/* ---- app.css ---- */
:root {
  color-scheme: light;
  --bg: #f4f7f6; --surface: #fff; --surface-2: #edf3f1; --surface-3: #e4ece9;
  --text: #12221e; --muted: #61716c; --line: #d4dfdb; --line-strong: #b9cbc5;
  --accent: #0f6957; --accent-strong: #095343; --accent-soft: #dff1eb;
  --correct: #086d3f; --correct-soft: #c9ead9; --wrong: #b4232e; --wrong-soft: #f7cfd3;
  --flag: #7a5200; --flag-soft: #f6d66c; --shadow: 0 14px 36px rgba(23,50,42,.08);
  --reader-size: 20px; --reader-family: Arial, Helvetica, sans-serif; --reader-weight: 650;
  --drawer-width: 210px; --header-safe-top: env(safe-area-inset-top, 0px);
  --header-row-height: 54px; --header-height: calc(var(--header-row-height) + var(--header-safe-top)); --radius: 16px;
}
html[data-theme="dark"] {
  color-scheme: dark; --bg: #101714; --surface: #18211e; --surface-2: #202c28; --surface-3: #293832;
  --text: #eef5f2; --muted: #a7b8b2; --line: #2e3f39; --line-strong: #425851;
  --accent: #6fcab3; --accent-strong: #52b99f; --accent-soft: #1b3c33;
  --correct: #7be0a8; --correct-soft: #1c4c32; --wrong: #ff9099; --wrong-soft: #51262b;
  --flag: #ffd36a; --flag-soft: #4f3c10; --shadow: 0 18px 46px rgba(0,0,0,.25);
}
html[data-theme="dark"][data-reading-comfort="off"] {
  --bg:#000000; --surface:#000000; --surface-2:#000000; --surface-3:#000000;
  --accent-soft:#000000; --correct-soft:#000000; --wrong-soft:#000000; --flag-soft:#000000;
  --shadow:none;
}
html[data-theme="dark"][data-reading-comfort="off"] .app-header,
html[data-theme="dark"][data-reading-comfort="off"] .auth-screen { background:#000000; }
* { box-sizing: border-box; }
html { min-height: 100%; scroll-behavior: smooth; }
body { margin: 0; min-height: 100%; background: var(--bg); color: var(--text); font-family: Arial, Helvetica, sans-serif; -webkit-font-smoothing: antialiased; }
button,input,select,textarea { font: inherit; color: inherit; }
button,a { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
:focus-visible { outline: 3px solid color-mix(in srgb,var(--accent) 48%,transparent); outline-offset: 2px; }
.hidden { display: none !important; }
.loading-screen { min-height:100vh; display:grid; place-items:center; padding:24px; }
.loading-card { width:min(560px,100%); padding:34px; text-align:center; background:var(--surface); border:1px solid var(--line); border-radius:24px; box-shadow:var(--shadow); }
.spinner { width:34px;height:34px;margin:0 auto 16px;border:3px solid var(--line);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite; }
@keyframes spin { to { transform:rotate(360deg); } }

.auth-screen { min-height:100svh;padding:clamp(14px,3vw,34px);display:grid;place-items:center;background:
  radial-gradient(circle at 12% 15%,color-mix(in srgb,var(--accent) 13%,transparent),transparent 32%),
  radial-gradient(circle at 88% 85%,color-mix(in srgb,var(--correct) 10%,transparent),transparent 30%),var(--bg); }
.auth-layout { width:min(1100px,100%);min-height:min(760px,calc(100svh - 40px));display:grid;grid-template-columns:minmax(0,1.08fr) minmax(360px,.92fr);overflow:hidden;border:1px solid var(--line);border-radius:30px;background:var(--surface);box-shadow:0 26px 80px rgba(12,45,36,.17); }
.auth-brand { position:relative;isolation:isolate;overflow:hidden;padding:clamp(28px,5vw,64px);display:flex;flex-direction:column;color:#eefbf7;background:linear-gradient(145deg,#0b4438 0%,#0f6957 56%,#164f48 100%); }
.auth-brand::before,.auth-brand::after { content:"";position:absolute;z-index:-1;border-radius:50%;border:1px solid rgba(255,255,255,.14); }
.auth-brand::before { width:430px;height:430px;right:-235px;top:-180px;box-shadow:0 0 0 54px rgba(255,255,255,.025),0 0 0 108px rgba(255,255,255,.018); }
.auth-brand::after { width:320px;height:320px;left:-190px;bottom:-190px;box-shadow:0 0 0 44px rgba(255,255,255,.025); }
.auth-brand-top { display:flex;align-items:center;gap:12px;font-size:13px;font-weight:850;letter-spacing:.02em; }
.auth-monogram,.auth-seal { display:grid;place-items:center;border-radius:12px;font-weight:900; }
.auth-monogram { width:42px;height:42px;color:#0b4438;background:#bdeadd;box-shadow:inset 0 0 0 1px rgba(255,255,255,.55); }
.mind-orbit { position:relative;width:min(310px,64vw);aspect-ratio:1;margin:auto;display:grid;place-items:center;border:1px solid rgba(255,255,255,.19);border-radius:50%;box-shadow:0 0 0 26px rgba(255,255,255,.04),0 0 0 52px rgba(255,255,255,.025); }
.mind-orbit::before,.mind-orbit::after { content:"";position:absolute;background:rgba(255,255,255,.16); }
.mind-orbit::before { width:76%;height:1px;transform:rotate(32deg); }.mind-orbit::after { width:1px;height:76%;transform:rotate(32deg); }
.orbit-core { width:112px;height:112px;display:grid;place-items:center;border-radius:42% 58% 52% 48%;color:#0b4438;background:#d7f5ec;font-family:Georgia,serif;font-size:58px;box-shadow:0 16px 40px rgba(0,0,0,.18); }
.mind-orbit i { position:absolute;width:15px;height:15px;border:3px solid #0f6957;border-radius:50%;background:#d7f5ec;box-shadow:0 0 0 7px rgba(215,245,236,.12); }
.mind-orbit i:nth-child(2){top:9%;left:27%}.mind-orbit i:nth-child(3){top:31%;right:6%}.mind-orbit i:nth-child(4){bottom:9%;right:28%}.mind-orbit i:nth-child(5){bottom:30%;left:6%}
.auth-brand-copy { max-width:620px; }.auth-brand-copy .eyebrow { color:#bdeadd; }.auth-brand-copy h1 { max-width:620px;margin:9px 0 14px;font-size:clamp(32px,4.5vw,56px);line-height:1.02;letter-spacing:-.045em; }.auth-brand-copy p { max-width:580px;margin:0;color:rgba(238,251,247,.78);font-size:14px;line-height:1.65; }
.auth-trust { display:flex;flex-wrap:wrap;gap:8px;margin-top:28px; }.auth-trust span { padding:7px 10px;border:1px solid rgba(255,255,255,.16);border-radius:999px;background:rgba(255,255,255,.07);font-size:10px;font-weight:800; }
.auth-panel { padding:clamp(28px,5vw,58px);display:flex;flex-direction:column;justify-content:center; }
.auth-panel-head { display:flex;align-items:center;gap:13px; }.auth-panel-head h2 { margin:2px 0 0;font-size:clamp(26px,3vw,36px);letter-spacing:-.035em; }.auth-seal { width:46px;height:46px;flex:none;color:#fff;background:var(--accent-strong);font-size:13px;letter-spacing:.05em; }
.auth-intro { margin:18px 0;color:var(--muted);font-size:13px;line-height:1.55; }
.auth-message { margin-bottom:14px;padding:11px 12px;border:1px solid color-mix(in srgb,var(--accent) 32%,var(--line));border-radius:11px;background:var(--accent-soft);color:var(--accent-strong);font-size:12px;font-weight:750; }
.auth-form { display:grid;gap:13px; }.auth-field { display:grid;gap:6px; }.auth-field span { font-size:11px;font-weight:850; }.auth-field input { width:100%;min-height:48px;padding:0 14px;border:1px solid var(--line-strong);border-radius:12px;background:var(--surface-2); }.auth-field input:focus { border-color:var(--accent);background:var(--surface);outline:3px solid color-mix(in srgb,var(--accent) 17%,transparent); }
.auth-text-button { justify-self:end;padding:0;border:0;background:transparent;color:var(--accent);font-size:11px;font-weight:850; }.auth-submit { width:100%;min-height:49px;margin-top:2px; }.auth-submit:disabled { opacity:.6;cursor:wait; }
.auth-switch { margin-top:16px;text-align:center;color:var(--muted);font-size:12px; }.auth-switch button { padding:0;border:0;background:transparent;color:var(--accent);font-weight:850; }
.auth-divider { display:flex;align-items:center;gap:10px;margin:22px 0 13px;color:var(--muted);font-size:9px;font-weight:800;letter-spacing:.08em;text-transform:uppercase; }.auth-divider::before,.auth-divider::after { content:"";height:1px;flex:1;background:var(--line); }
.auth-demo { width:100%; }.auth-footnote { margin:10px 0 0;text-align:center;color:var(--muted);font-size:9px;line-height:1.5; }

.app-header { position:sticky;top:0;z-index:80;height:var(--header-height);display:flex;align-items:center;gap:8px;padding:calc(var(--header-safe-top) + 8px) 10px 7px;background:color-mix(in srgb,var(--surface) 94%,transparent);border-bottom:1px solid var(--line);backdrop-filter:blur(16px); }
.icon-button { width:38px;height:38px;min-width:38px;display:inline-grid;place-items:center;border:1px solid var(--line);border-radius:50%;background:var(--surface);font-weight:800;touch-action:manipulation; }
.icon-button:hover,.tool-icon:hover { border-color:var(--accent);background:var(--accent-soft); }
.icon-button:disabled { opacity:.34;cursor:default; }
.menu-button { font-size:20px;line-height:1; }
.back-button { font-size:22px;line-height:1; }
.home-button { background:var(--accent-strong);color:#fff;border-color:transparent;font-size:14px; }
.header-center { position:relative; flex:1; min-width:0; display:flex;align-items:center; }
.header-crumbs { min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--muted);font-size:12px; }
.header-crumbs button { border:0;background:transparent;color:var(--accent);padding:0; }
.search-wrap { position:relative; }
.search-panel { position:absolute;top:44px;left:0;width:min(520px,calc(100vw - 30px));padding:8px;background:var(--surface);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow); }
.search-panel input { width:100%;height:40px;padding:0 12px;background:var(--surface-2);border:1px solid var(--line);border-radius:10px; }
.search-results { max-height:56vh;overflow:auto;margin-top:7px; }
.search-result { width:100%;padding:10px;border:0;border-radius:9px;background:transparent;text-align:left; }
.search-result:hover { background:var(--surface-2); }
.search-result small,.search-result span { display:block; }
.search-result small { color:var(--accent);font-weight:800;margin-bottom:3px; }
.search-result span { color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap; }
.account-wrap { position:relative; }
.account-button { position:relative;background:var(--accent-soft);color:var(--accent-strong);font-size:12px; }
.sync-dot { position:absolute;width:8px;height:8px;border-radius:50%;background:var(--correct);right:-1px;bottom:-1px;border:2px solid var(--surface); }
.sync-dot[data-sync-status="saving"] { background:#2563eb; }
.sync-dot[data-sync-status="offline"],.sync-dot[data-sync-status="retrying"] { background:#d97706; }
.sync-dot[data-sync-status="action-required"] { background:var(--wrong); }
.account-popover { position:absolute;top:44px;left:0;min-width:220px;padding:14px;background:var(--surface);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow); }
.account-popover strong,.account-popover span { display:block; }
.account-popover span { color:var(--muted);font-size:12px;margin-top:4px; }
.account-popover .app-version { margin-top:9px;font-size:10px;font-weight:850;letter-spacing:.04em; }
.account-popover a,.account-popover [data-action="sign-out"] { display:block;margin-top:12px;color:var(--wrong);font-weight:800;text-decoration:none;font-size:13px; }
.account-popover [data-action="sign-out"] { border:0;background:transparent;padding:0;cursor:pointer;font:inherit;font-weight:800; }
.account-popover [data-action="sign-out"][aria-busy="true"] { opacity:.65;cursor:wait; }

.app-frame { display:grid;grid-template-columns:0 minmax(0,1fr);transition:grid-template-columns .22s ease; }
.app-frame.drawer-open { grid-template-columns:var(--drawer-width) minmax(0,1fr); }
.side-drawer { position:sticky;top:var(--header-height);height:calc(100vh - var(--header-height));overflow:hidden;background:var(--surface);border-right:1px solid var(--line); }
.drawer-inner { width:var(--drawer-width);height:100%;padding:12px 10px;display:flex;flex-direction:column;gap:5px; }
.drawer-link { width:100%;min-height:42px;padding:0 12px;display:flex;align-items:center;gap:10px;border:0;border-radius:11px;background:transparent;text-align:left;font-size:13px;font-weight:750; }
.drawer-link:hover,.drawer-link.active { background:var(--accent-soft);color:var(--accent); }
.drawer-premium { margin-left:auto;padding:3px 6px;border-radius:999px;background:var(--flag-soft);color:var(--flag);font-size:8px;font-weight:900;letter-spacing:.03em; }
.drawer-link.flagged { color:var(--flag); }
.drawer-link.wrong { color:var(--wrong); }
.drawer-icon { width:25px;text-align:center;font-size:17px; }
.drawer-spacer { flex:1; }
.drawer-note { padding:10px;color:var(--muted);font-size:11px;line-height:1.45; }
.drawer-version { padding:0 10px 8px;color:var(--muted);font-size:9px;font-weight:850;letter-spacing:.05em;text-transform:uppercase; }
.content { min-width:0; }
.page-shell { width:min(1080px,calc(100% - 28px));margin:0 auto;padding:24px 0 70px; }
.reader-shell { width:100%;padding:10px 12px 54px; }
h1,h2,h3,p { margin-top:0; }
h1 { margin-bottom:8px;font-size:clamp(26px,4vw,40px);line-height:1.08;letter-spacing:-.035em; }
.muted { color:var(--muted); }
.small { font-size:12px; }
.eyebrow { color:var(--accent);font-size:11px;font-weight:900;letter-spacing:.13em;text-transform:uppercase; }
.panel { background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow); }
.empty-state { padding:38px;text-align:center;background:var(--surface);border:1px dashed var(--line-strong);border-radius:16px; }

.library-shell { max-width:1180px; }
.library-grid { display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,470px),1fr));gap:16px;align-items:stretch; }
.book-tile { min-height:260px;position:relative;overflow:hidden;display:grid;grid-template-columns:minmax(150px,38%) minmax(0,1fr);border:1px solid var(--line);border-radius:18px;background:var(--surface);box-shadow:var(--shadow);text-align:left;padding:0; }
.book-tile:hover { transform:translateY(-2px);border-color:var(--accent); }
.book-cover-compact { min-height:100%;padding:22px 18px;color:#fff;background:linear-gradient(145deg,#155a4d,#0c3f36);position:relative;overflow:hidden; }
.book-cover-compact::after { content:"";position:absolute;width:145px;height:145px;border:25px solid rgba(255,255,255,.07);border-radius:50%;right:-68px;bottom:-75px; }
.book-cover-image { min-height:100%;display:grid;place-items:center;overflow:hidden;background:#f5f7f6; }
.book-cover-image img { width:100%;height:100%;object-fit:contain;display:block; }
.cover-kicker { font-size:10px;font-weight:900;letter-spacing:.17em; }
.cover-title { margin-top:6px;font-size:24px;font-weight:850;letter-spacing:-.04em; }
.cover-meta { position:absolute;left:18px;bottom:18px;font-size:10px;color:rgba(255,255,255,.82); }
.tile-body { min-width:0;padding:20px;display:flex;flex-direction:column; }
.tile-heading h2 { margin:0;font-size:clamp(18px,2.3vw,25px);line-height:1.12;letter-spacing:-.025em; }
.tile-heading p { margin:7px 0 18px;color:var(--muted);font-size:12px; }
.tile-meta { color:var(--muted);font-size:12px; }
.tile-progress { margin-top:auto; }
.tile-stats { display:flex;justify-content:space-between;gap:10px;margin-bottom:7px;font-size:11px;color:var(--muted); }
.progress-track { height:7px;overflow:hidden;border-radius:999px;background:var(--surface-3); }
.progress-fill { height:100%;background:var(--accent);border-radius:inherit; }
.book-placeholder { aspect-ratio:1/1;border:1px dashed color-mix(in srgb,var(--line) 44%,transparent);border-radius:18px;background:color-mix(in srgb,var(--surface) 18%,transparent);display:grid;place-items:center;color:color-mix(in srgb,var(--muted) 22%,transparent);font-size:10px;letter-spacing:.05em; }
.saved-notes-list { display:grid;gap:12px; }
.saved-note-card { overflow:hidden;padding:0; }
.saved-note-link { width:100%;padding:11px 15px;display:flex;justify-content:space-between;gap:12px;border:0;border-bottom:1px solid var(--line);background:var(--surface-2);color:var(--accent);text-align:left;font-size:12px;font-weight:850; }
.saved-note-link time { flex:none;color:var(--muted);font-size:10px;font-weight:600; }
.saved-question { padding:16px 18px 12px;font-family:var(--reader-family);font-size:calc(var(--reader-size) * .78);font-weight:var(--reader-weight);line-height:1.55; }
.saved-note-text { margin:0 18px 18px;padding:13px 15px;border-left:4px solid var(--accent);border-radius:0 11px 11px 0;background:var(--accent-soft);font-family:var(--reader-family);font-size:calc(var(--reader-size) * .72);font-weight:var(--reader-weight);line-height:1.5; }

.book-panel { padding:18px 20px;margin-bottom:14px;display:flex;align-items:center;justify-content:space-between;gap:14px; }
.book-panel h1 { font-size:clamp(24px,3vw,32px);margin:0; }
.book-panel-meta { color:var(--muted);font-size:12px;margin-top:4px; }
.status-pill { flex:none;padding:7px 10px;border-radius:999px;background:var(--accent-soft);color:var(--accent);font-size:11px;font-weight:850; }
.chapter-list { display:grid;grid-template-columns:1fr;gap:10px; }
.chapter-card { width:100%;padding:15px 17px;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:12px;border:1px solid var(--line);border-radius:14px;background:var(--surface);box-shadow:0 5px 18px rgba(20,50,41,.04);text-align:left; }
.chapter-card:hover { border-color:var(--accent);transform:translateX(2px); }
.chapter-card.locked { opacity:.82;cursor:pointer;background:linear-gradient(135deg,var(--surface),var(--surface-2)); }
.chapter-card.locked:hover { border-color:var(--flag); }
.premium-lock { display:inline-flex;padding:4px 9px;border-radius:999px;color:var(--flag);background:var(--flag-soft);font-weight:850; }
.premium-feature-panel { width:min(620px,100%);margin:8vh auto 0;text-align:center;padding:clamp(28px,6vw,56px); }
.premium-feature-panel p { max-width:480px;margin:14px auto 22px;color:var(--muted);line-height:1.65; }
.chapter-label { color:var(--accent);font-size:10px;font-weight:900;letter-spacing:.09em; }
.chapter-card h3 { margin:3px 0 9px;font-size:16px; }
.chapter-meta { display:flex;gap:12px;color:var(--muted);font-size:11px; }
.chapter-count { font-size:18px;font-weight:900; }

.reader-topnav { margin-bottom:10px;padding:10px 12px;background:var(--surface);border:1px solid var(--line);border-radius:13px; }
.chapter-strip-head { display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:8px; }
.chapter-strip-head strong { font-size:13px; }
.chapter-strip-head span { color:var(--muted);font-size:11px; }
.number-strip { position:relative;display:flex;flex-wrap:wrap;align-items:center;gap:6px;overflow:visible;padding:2px; }
.number-page { display:contents; }
.number-chip { width:33px;height:33px;min-width:33px;border:1px solid var(--line);border-radius:9px;background:var(--surface-2);font-size:11px;font-weight:800; }
.number-chip.correct { background:color-mix(in srgb,var(--correct) 22%,var(--surface));border-color:color-mix(in srgb,var(--correct) 60%,var(--line));color:var(--correct); }
.number-chip.wrong { background:color-mix(in srgb,var(--wrong) 20%,var(--surface));border-color:color-mix(in srgb,var(--wrong) 62%,var(--line));color:var(--wrong); }
.number-chip.flagged { box-shadow:0 0 0 2px color-mix(in srgb,var(--flag) 72%,transparent);background-color:color-mix(in srgb,var(--flag-soft) 45%,var(--surface)); }
.number-chip.current { outline:3px solid var(--accent-strong);outline-offset:1px;background:var(--accent-strong);border-color:var(--accent-strong);color:#fff; }
.reader-card { position:relative;width:100%;padding:14px clamp(16px,4vw,46px) 28px;background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow); }
.reader-toolbar { display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:10px;border-bottom:1px solid var(--line); }
.question-index { color:var(--text);font-size:15px;font-weight:900; }
.marker-row { display:flex;align-items:center;gap:6px;position:relative; }
.tool-icon { width:34px;height:34px;display:grid;place-items:center;border:1px solid var(--line);border-radius:9px;background:var(--surface);font-size:15px; }
.tool-icon.active,.tool-icon.speaking,.mini-tool.speaking { background:var(--accent-soft);color:var(--accent);border-color:var(--accent); }
.tool-word { min-height:34px;padding:0 9px;border:1px solid var(--line);border-radius:9px;background:var(--surface);font-size:11px;font-weight:850; }
.tool-word.active { background:var(--accent-soft);color:var(--accent);border-color:var(--accent); }
.review-tool { min-height:36px;padding:0 10px;display:inline-flex;align-items:center;gap:5px;border:1px solid var(--line);border-radius:9px;background:var(--surface);font-size:11px;font-weight:850;white-space:nowrap;touch-action:manipulation; }
.review-tool:hover { border-color:var(--accent);background:var(--accent-soft); }
.review-tool.flag { color:var(--flag); }
.tool-icon.flag { color:var(--flag); }
.tool-icon.flag.active { background:var(--flag-soft);border-color:var(--flag);color:var(--flag); }
.highlight-palette { position:absolute;right:0;top:40px;z-index:10;display:flex;gap:7px;padding:8px;background:var(--surface);border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow); }
.color-dot { width:26px;height:26px;border:1px solid rgba(0,0,0,.16);border-radius:50%; }
.color-dot.yellow { background:#ffe477; }.color-dot.green { background:#9fe3b7; }.color-dot.blue { background:#a9d8ff; }.color-dot.pink { background:#ffb9d0; }
.color-dot.remove { display:grid;place-items:center;background:var(--surface-2);color:var(--wrong);font-size:18px;font-weight:900; }
.reader-content { font-family:var(--reader-family);font-size:var(--reader-size);font-weight:var(--reader-weight);line-height:1.7; }
.text-section { margin:22px 0; }
.section-label { margin-bottom:7px;color:var(--accent);font-family:Arial,Helvetica,sans-serif;font-size:11px;font-weight:900;letter-spacing:.13em;text-transform:uppercase; }
.lead-in { margin:0;padding:18px 20px;background:var(--surface-2);border-left:5px solid color-mix(in srgb,var(--accent) 28%,var(--line));border-radius:0 14px 14px 0;white-space:pre-line; }
.question-stem { margin:0;white-space:pre-line; }
.options { width:100%;min-width:0;display:grid;gap:7px;margin:16px 0; }
.option { width:100%;max-width:100%;height:auto;min-height:54px;padding:10px 13px;display:flex;align-items:center;gap:11px;overflow:visible;border:1px solid var(--line-strong);border-radius:13px;background:var(--surface);text-align:left;line-height:1.35; }
.option:hover:not([aria-disabled="true"]) { border-color:var(--accent);background:var(--accent-soft); }
.option:disabled { cursor:default;opacity:1; }
.option-letter { width:34px;height:34px;flex:0 0 34px;display:grid;place-items:center;border-radius:9px;background:var(--surface-2);color:var(--accent);font-weight:900; }
.option.active { background:var(--accent-soft);border:2px solid var(--accent); }
.option.active .option-letter { background:var(--accent);color:#fff; }
.option.correct { background:var(--correct-soft);border:2px solid var(--correct);color:color-mix(in srgb,var(--correct) 82%,var(--text)); }
.option.correct .option-letter { background:color-mix(in srgb,var(--correct) 20%,var(--surface));color:var(--correct);border:1px solid var(--correct); }
.option.incorrect { background:var(--wrong-soft);border:2px solid var(--wrong);color:color-mix(in srgb,var(--wrong) 82%,var(--text)); }
.option.incorrect .option-letter { background:color-mix(in srgb,var(--wrong) 20%,var(--surface));color:var(--wrong);border:1px solid var(--wrong); }
.multi-submit-row { display:flex;align-items:center;justify-content:space-between;gap:12px;margin:0 0 16px;padding:10px 12px;border:1px solid var(--line);border-radius:12px;background:var(--surface-2);font-family:Arial,Helvetica,sans-serif;font-size:11px;color:var(--muted); }
.multi-submit-row .button:disabled { opacity:.45;cursor:not-allowed; }
.reader-inline-nav { display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:center;gap:12px;margin:18px auto;padding-top:14px;border-top:1px solid var(--line); }
.nav-button { width:min(100%,180px);min-height:48px;padding:0 18px;display:inline-flex;align-items:center;justify-content:center;gap:9px;border:1px solid var(--line-strong);border-radius:12px;background:var(--surface-2);color:var(--text);font-family:Arial,Helvetica,sans-serif;font-size:13px;font-weight:900;box-shadow:0 4px 12px rgba(20,50,41,.06); }
.nav-button:first-child { justify-self:end; }
.nav-button:last-child { justify-self:start; }
.nav-button:hover:not(:disabled) { border-color:var(--accent);background:var(--accent-soft);color:var(--accent-strong); }
.nav-button.finish-button { color:#fff;background:var(--accent-strong);border-color:var(--accent-strong); }
.nav-button:disabled { opacity:.34;cursor:not-allowed; }
.nav-label { color:var(--muted);font-family:Arial,Helvetica,sans-serif;font-size:11px; }
.edge-nav { position:absolute;top:12px;z-index:5;width:34px;height:38px;border:1px solid var(--line);background:var(--surface);box-shadow:var(--shadow);font-size:22px; }
.edge-nav.prev { left:-8px;border-radius:0 12px 12px 0; }.edge-nav.next { right:-8px;border-radius:12px 0 0 12px; }
.edge-nav:disabled { display:none; }
.answer-area { display:grid;gap:11px;margin-top:4px; }
.answer-section { padding:17px 19px;border:1px solid var(--line);border-radius:14px;background:var(--surface-2); }
.answer-section.correct-answer { background:var(--correct-soft);border-color:color-mix(in srgb,var(--correct) 45%,var(--line)); }
.answer-section h3 { margin:0 0 9px;font-family:Arial,Helvetica,sans-serif;font-size:15px; }
.answer-section p { margin:0;white-space:pre-line; }
.explanation-head { display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin-bottom:10px; }
.explanation-head h3 { flex:none;margin:5px 0 0; }
.explanation-tools { width:min(100%,600px);display:grid;grid-template-columns:repeat(auto-fit,minmax(118px,1fr));gap:7px; }
.explanation-highlight-wrap { position:relative;display:grid; }
.explanation-highlight-wrap .highlight-palette { top:35px;right:0; }
.mini-tool { width:100%;min-height:36px;padding:0 10px;border:1px solid var(--line);border-radius:8px;background:var(--surface);font-family:Arial,Helvetica,sans-serif;font-size:10px;font-weight:850;white-space:nowrap; }
.mini-tool.remove-highlight { color:var(--wrong); }
.note-card { margin-top:18px;padding-top:16px;border-top:1px solid var(--line); }
.note-card textarea { width:100%;height:auto;min-height:120px;max-height:none;field-sizing:content;resize:none;overflow:hidden;overflow-wrap:anywhere;white-space:pre-wrap;overflow-anchor:none;padding:14px;border:1px solid var(--line);border-radius:12px;background:var(--surface-2);font-family:var(--reader-family);font-size:var(--reader-size);font-weight:var(--reader-weight);line-height:1.5; }
.note-actions { display:flex;justify-content:flex-end;align-items:center;gap:10px;margin-top:8px; }
.next-note-button { min-width:160px; }
.note-status { color:var(--muted);font-family:Arial,Helvetica,sans-serif;font-size:11px; }
mark.hl-yellow { background:#ffe477; } mark.hl-green { background:#9fe3b7; } mark.hl-blue { background:#a9d8ff; } mark.hl-pink { background:#ffb9d0; }
mark { color:#12221e;border-radius:3px;padding:0 .04em; }
mark.selected-highlight { outline:2px solid var(--accent);outline-offset:2px; }

.mode-head { margin-bottom:16px; }
.mode-head p { margin:5px 0 0;color:var(--muted); }
.queue-list { display:flex;flex-wrap:wrap;align-items:flex-start;gap:clamp(8px,1.6vw,14px); }
.queue-item { width:clamp(48px,3.25em,66px);aspect-ratio:1;padding:0;display:grid;place-items:center;flex:0 0 auto;border:1px solid var(--line-strong);border-radius:50%;background:var(--surface);text-align:center;box-shadow:0 4px 12px rgba(20,50,41,.06); }
.queue-item:hover { border-color:var(--accent);background:var(--accent-soft);color:var(--accent-strong);transform:translateY(-1px); }
.queue-number { display:grid;place-items:center;font-size:clamp(13px,.72em,18px);font-weight:900; }
.queue-copy { min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap; }
.queue-time { color:var(--muted);font-size:10px; }
.practice-banner { margin-bottom:10px;padding:9px 12px;border-radius:12px;background:var(--surface);border:1px solid var(--line);color:var(--muted);font-size:12px; }
.practice-banner.wrong { color:var(--wrong); }.practice-banner.flagged { color:var(--flag);background:var(--flag-soft); }
.exam-form { padding:22px; }
.form-grid { display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px; }
.field { display:grid;gap:7px;font-weight:800; }
.field span { font-size:13px; }
.field select,.field input[type="number"],.field input[type="range"] { width:100%;min-height:44px;padding:0 12px;border:1px solid var(--line);border-radius:11px;background:var(--surface-2); }
.field input[type="range"] { padding:0; }
.voice-field-row { display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px;align-items:center; }
.voice-field-row select { width:100%;min-width:0;min-height:44px;padding:0 12px;border:1px solid var(--line);border-radius:11px;background:var(--surface-2);touch-action:manipulation; }
.voice-refresh { min-height:44px;white-space:nowrap; }
.field-hint { color:var(--muted);font-size:11px;font-weight:600; }
.source-box { margin-top:15px;padding:14px;border:1px solid var(--line);border-radius:12px; }
.source-box legend { font-weight:900;padding:0 6px; }
.source-box label { display:flex;align-items:center;gap:8px;padding:7px; }
.button { min-height:42px;padding:0 16px;border:1px solid var(--line-strong);border-radius:11px;background:var(--surface);font-weight:850;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:8px; }
.button.primary { color:#fff;background:var(--accent-strong);border-color:var(--accent-strong); }
.button.flag { color:var(--flag);background:var(--flag-soft);border-color:var(--flag); }
.button-row { display:flex;flex-wrap:wrap;gap:9px;margin-top:18px; }
.exam-score { padding:35px;text-align:center; }.exam-score strong { display:block;font-size:50px;color:var(--accent); }

.admin-console { display:grid;gap:18px; }
.admin-loading { min-height:180px;display:grid;place-items:center;color:var(--muted);font-weight:750; }
.admin-section { padding:clamp(18px,3vw,28px); }
.admin-section-head { display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:18px; }
.admin-section-head h2 { margin:3px 0 0;font-size:24px; }
.admin-section-head input { width:min(330px,100%);min-height:44px;padding:0 13px;border:1px solid var(--line-strong);border-radius:11px;background:var(--surface-2); }
.admin-users,.admin-chapters { display:grid;gap:9px; }
.admin-user,.admin-chapter { display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:16px;padding:14px;border:1px solid var(--line);border-radius:14px;background:var(--surface-2); }
.admin-user > div:first-child,.admin-chapter > span { min-width:0;display:grid;gap:3px; }
.admin-user span,.admin-user small,.admin-chapter small { color:var(--muted);font-size:11px;overflow-wrap:anywhere; }
.admin-user-actions { display:flex;align-items:center;flex-wrap:wrap;justify-content:flex-end;gap:7px; }
.admin-user-actions select,.admin-chapter select { min-height:40px;padding:0 10px;border:1px solid var(--line);border-radius:10px;background:var(--surface); }
.admin-date { display:grid;gap:3px;color:var(--muted);font-size:9px;font-weight:800; }.admin-date input { min-height:40px;padding:0 8px;border:1px solid var(--line);border-radius:10px;background:var(--surface);font-size:10px; }
.admin-duration select { min-width:180px; }
.admin-date input:disabled { opacity:.55;cursor:not-allowed; }
.admin-user-owner { background:color-mix(in srgb,var(--accent-soft) 74%,var(--surface)); }
.admin-permanent-badge { display:inline-flex;align-items:center;padding:7px 10px;border-radius:999px;background:var(--accent-soft);color:var(--accent-strong)!important;font-size:10px!important;font-weight:900;white-space:nowrap; }
.admin-user-actions .button { min-height:40px;padding:0 13px;font-size:11px; }

.settings-dialog { width:min(680px,calc(100% - 24px));max-height:88vh;padding:0;border:1px solid var(--line);border-radius:20px;background:var(--surface);color:var(--text);box-shadow:0 30px 100px rgba(0,0,0,.32); }
.settings-dialog::backdrop { background:rgba(9,19,16,.55);backdrop-filter:blur(4px); }
.dialog-head,.dialog-actions { display:flex;align-items:center;justify-content:space-between;gap:12px;padding:15px 18px;border-bottom:1px solid var(--line); }
.dialog-head h2 { margin:0;font-size:20px; }.dialog-head p { margin:2px 0 0;color:var(--muted);font-size:11px; }
.dialog-body { padding:18px;display:grid;gap:15px;max-height:62vh;overflow:auto; }
.dialog-actions { justify-content:flex-end;border-top:1px solid var(--line);border-bottom:0; }
.sound-fieldset { display:flex;flex-wrap:wrap;gap:8px 18px;padding:13px;border:1px solid var(--line);border-radius:12px; }
.sound-fieldset legend { font-weight:900;padding:0 6px; }.sound-fieldset label { display:flex;align-items:center;gap:7px; }
.toast { position:fixed;z-index:200;left:50%;bottom:22px;transform:translate(-50%,18px);padding:10px 14px;border-radius:12px;background:var(--text);color:var(--surface);font-weight:800;font-size:12px;opacity:0;pointer-events:none;transition:.2s ease; }
.toast.show { opacity:1;transform:translate(-50%,0); }

@media (min-width:768px) and (max-width:1366px) {
  :root { --header-row-height:66px; }
  .app-header { gap:10px;padding:calc(var(--header-safe-top) + 11px) 16px 8px; }
  .icon-button { width:46px;height:46px;min-width:46px;font-size:15px; }
  .menu-button,.back-button { font-size:24px; }
  .account-button { font-size:13px; }
  .header-crumbs { font-size:13px; }
  .search-panel,.account-popover { top:52px; }
}

@media (max-width:760px) {
  :root { --drawer-width:min(82vw,270px); }
  .app-frame.drawer-open { grid-template-columns:var(--drawer-width) minmax(320px,1fr);overflow-x:auto; }
  .page-shell { width:calc(100% - 20px);padding-top:16px; }
  .reader-shell { padding:8px 5px 40px; }
  .book-tile { min-height:235px;grid-template-columns:minmax(132px,38%) minmax(0,1fr); }
  .library-grid { grid-template-columns:1fr;gap:11px; }
  .cover-title { font-size:20px; }.tile-body { padding:15px; }.tile-heading h2 { font-size:18px; }
  .book-panel { align-items:flex-start; }.status-pill { display:none; }
  .reader-card { padding:11px 14px 24px;border-radius:14px; }
  .reader-content { line-height:1.58; }
  .lead-in { padding:14px; }.option { min-height:50px; }
  .number-chip { width:31px;height:31px;min-width:31px; }
  .explanation-head { flex-direction:column; }.explanation-tools { width:100%; }
  .form-grid { grid-template-columns:1fr; }
  .auth-screen { padding:0;place-items:stretch; }.auth-layout { min-height:100svh;grid-template-columns:1fr;border:0;border-radius:0; }.auth-brand { min-height:250px;padding:24px; }.mind-orbit { position:absolute;width:190px;right:-38px;top:42px;opacity:.62; }.orbit-core { width:78px;height:78px;font-size:40px; }.auth-brand-copy { margin-top:auto;max-width:68%; }.auth-brand-copy h1 { margin-bottom:8px;font-size:30px; }.auth-brand-copy p { display:none; }.auth-trust { margin-top:14px;max-width:80%; }.auth-panel { padding:28px 22px 34px; }
  .admin-section-head { align-items:stretch;flex-direction:column; }.admin-section-head input { width:100%; }
  .admin-user,.admin-chapter { grid-template-columns:1fr; }.admin-user-actions { justify-content:stretch; }.admin-user-actions > * { flex:1 1 130px; }.admin-chapter select { width:100%; }
}
@media (max-width:430px) {
  .book-tile { min-height:215px;grid-template-columns:minmax(112px,38%) minmax(0,1fr); }
  .book-cover-compact { min-height:100%;padding:17px 12px; }.cover-meta { left:12px;bottom:14px; }
  .tile-body { padding:13px; }.tile-heading h2 { font-size:16px; }.tile-heading p { margin-bottom:12px;font-size:10px; }
  .reader-toolbar { align-items:flex-start; }.marker-row { gap:4px;flex-wrap:wrap;justify-content:flex-end; }.tool-icon { width:32px;height:32px; }.review-tool { min-height:34px;padding:0 8px;font-size:10px; }
  .chapter-strip-head { align-items:flex-start;flex-direction:column;gap:3px; }
  .reader-inline-nav { gap:7px; }.nav-button { min-height:44px;padding:0 10px;font-size:12px; }.nav-label { font-size:10px;text-align:center; }
  .voice-field-row { grid-template-columns:1fr; }.voice-refresh { width:100%; }
  .auth-brand { min-height:230px; }.auth-brand-top { max-width:62%;font-size:11px; }.auth-brand-copy { max-width:72%; }.auth-brand-copy h1 { font-size:26px; }.auth-trust span:nth-child(3) { display:none; }.auth-panel { padding:24px 18px 30px; }
}
@media (prefers-reduced-motion:reduce) { *,*::before,*::after { scroll-behavior:auto!important;transition:none!important;animation:none!important; } }

/* IQMentis 9.0 — compact scientific workspace */
.drawer-inner { overflow-y:auto;overscroll-behavior:contain; }
.brand-mark { width:44px;height:44px;flex:none;position:relative;display:grid;place-items:center;border-radius:15px;background:linear-gradient(145deg,#f5fffb,#b8eadc);color:#073e34;border:1px solid rgba(8,83,67,.18);box-shadow:0 8px 18px rgba(5,65,52,.18),inset 0 1px 0 #fff; }
.brand-mark svg { width:31px;height:31px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round; }
.brand-mark b { position:absolute;right:3px;bottom:2px;padding:1px 3px;border-radius:5px;background:var(--accent-strong);color:#fff;font-size:7px;letter-spacing:-.04em; }
.brand-mark.on-dark { background:linear-gradient(145deg,#e8fff8,#9fe1d0);box-shadow:0 9px 22px rgba(0,0,0,.22),inset 0 1px 0 #fff; }
.auth-brand-top > span:last-child { display:grid;gap:1px; }
.auth-brand-top strong { font-size:17px;letter-spacing:-.02em; }
.auth-brand-top small { color:rgba(238,251,247,.72);font-size:9px;letter-spacing:.08em;text-transform:uppercase; }
.password-control { position:relative;display:block; }
.auth-field .password-control input { padding-right:52px; }
.password-toggle { position:absolute;right:6px;top:50%;width:39px;height:39px;transform:translateY(-50%);display:grid;place-items:center;border:0;border-radius:10px;background:transparent;color:var(--accent);font-size:18px; }
.password-toggle:hover { background:var(--accent-soft); }
.auth-card .brand-mark { margin:0 auto 16px; }

.app-header { display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:12px;padding-left:14px;padding-right:14px; }
.header-left,.header-right { display:flex;align-items:center;gap:7px; }
.header-right { justify-self:end; }
.header-center { justify-content:center; }
.header-crumbs { width:100%;text-align:center;font-weight:700; }
.header-library-switch,.library-mobile-tabs { display:inline-grid;grid-template-columns:1fr 1fr;padding:4px;border:1px solid var(--line);border-radius:14px;background:var(--surface-2);box-shadow:inset 0 1px 3px rgba(13,50,42,.06); }
.header-library-switch button,.library-mobile-tabs button { min-height:34px;padding:0 13px;border:0;border-radius:10px;background:transparent;color:var(--muted);font-size:11px;font-weight:850;white-space:nowrap; }
.header-library-switch button.active,.library-mobile-tabs button.active { background:var(--surface);color:var(--accent-strong);box-shadow:0 5px 13px rgba(14,60,49,.12),inset 0 1px 0 rgba(255,255,255,.8); }
.library-home-button { min-height:38px;padding:0 12px;display:inline-flex;align-items:center;gap:7px;border:1px solid color-mix(in srgb,var(--accent) 34%,var(--line));border-radius:12px;background:linear-gradient(180deg,var(--surface),var(--accent-soft));color:var(--accent-strong);box-shadow:0 4px 0 color-mix(in srgb,var(--accent) 28%,var(--line)),0 8px 14px rgba(11,71,59,.1);font-size:11px; }
.library-home-button:active { transform:translateY(3px);box-shadow:0 1px 0 color-mix(in srgb,var(--accent) 28%,var(--line)); }
.library-home-button span { font-size:17px; }
.account-button { position:relative;width:42px;height:42px;padding:0;border:0;border-radius:14px;background:transparent; }
.avatar-sticker { width:40px;height:40px;display:grid;place-items:center;border:2px solid #fff;border-radius:15px 15px 15px 6px;background:linear-gradient(145deg,#dff5ee,#acdcca);color:var(--accent-strong);box-shadow:0 6px 15px rgba(11,71,59,.2),inset 0 1px 0 #fff;font-size:11px;font-weight:950;transform:rotate(-2deg); }
.account-button:hover .avatar-sticker { transform:rotate(0) translateY(-1px); }
.account-popover { right:0;left:auto; }
.sync-dot { right:-1px;bottom:-1px; }
.search-panel { left:0; }

.library-shell { width:min(1440px,calc(100% - 28px));max-width:none; }
.library-mobile-tabs { display:none;margin-bottom:13px; }
.library-grid { display:grid;grid-template-columns:minmax(300px,.85fr) minmax(420px,1.15fr);gap:18px;align-items:start; }
.library-panel { min-width:0;padding:15px;border:1px solid var(--line);border-radius:20px;background:color-mix(in srgb,var(--surface) 86%,var(--surface-2));box-shadow:var(--shadow); }
.library-panel > header { display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px;padding:0 3px; }
.library-panel > header h1 { margin:3px 0 0;font-size:21px;letter-spacing:-.025em; }
.library-count { width:31px;height:31px;display:grid;place-items:center;border-radius:10px;background:var(--accent-soft);color:var(--accent-strong);font-size:11px;font-weight:900; }
.library-books { display:grid;gap:9px; }
.book-tile { min-height:0;position:relative;display:block;overflow:hidden;border:1px solid var(--line);border-radius:15px;background:var(--surface);box-shadow:0 7px 18px rgba(17,55,45,.06);padding:0; }
.book-tile:hover { transform:translateY(-1px);border-color:color-mix(in srgb,var(--accent) 52%,var(--line));box-shadow:0 11px 24px rgba(17,55,45,.1); }
.book-open { width:100%;min-height:122px;padding:8px 42px 8px 8px;display:grid;grid-template-columns:78px minmax(0,1fr);gap:12px;border:0;background:transparent;text-align:left; }
.book-cover-image { width:78px;height:106px;min-height:0;align-self:center;border-radius:9px;background:linear-gradient(145deg,#edf5f2,#d9e7e2);box-shadow:0 6px 14px rgba(12,48,39,.16); }
.book-cover-image img { width:100%;height:100%;object-fit:contain;background:#fff; }
.cover-fallback { display:none;width:100%;height:100%;place-items:center;border:1px solid var(--line);border-radius:inherit;background:linear-gradient(145deg,#0d5c4c,#143f38);color:#e9fff8;font-size:22px;font-weight:900; }
.book-cover-image.missing-cover .cover-fallback,.book-panel-cover.missing-cover .cover-fallback { display:grid; }
.book-cover-image.missing-cover img,.book-panel-cover.missing-cover img { display:none; }
.library-refresh-button { display:inline-flex;align-items:center;justify-content:center;gap:5px;min-height:38px;padding:0 10px;border:1px solid var(--line);border-radius:12px;background:var(--surface);color:var(--text);font-size:12px;touch-action:manipulation; }
.library-refresh-button > span { font-size:22px;line-height:1; }
.library-refresh-button:disabled { opacity:.65;cursor:wait; }
@media (max-width:640px) { .library-refresh-button { padding:0 6px;gap:3px;font-size:10px; } }
.favorite-button { position:absolute;z-index:3;right:8px;top:8px;width:32px;height:32px;display:grid;place-items:center;border:1px solid var(--line);border-radius:11px;background:var(--surface-2);color:#87938f;font-size:17px;box-shadow:0 4px 10px rgba(12,48,39,.08); }
.favorite-button.active { border-color:#d5a416;background:#fff3bd;color:#9c6b00;text-shadow:0 1px 0 #fff; }
.tile-body { padding:4px 0;display:flex;min-height:106px; }
.tile-heading h2 { padding-right:3px;font-size:15px;line-height:1.16;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden; }
.tile-heading p { margin:5px 0 8px;font-size:9px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis; }
.tile-meta { display:flex;align-items:center;flex-wrap:wrap;gap:7px;font-size:10px; }
.tile-meta span { color:var(--muted); }
.tile-progress { margin-top:auto; }
.tile-stats { justify-content:flex-end;margin-bottom:4px;font-size:9px; }
.progress-track { height:5px; }
.library-empty { min-height:160px;padding:25px;display:grid;place-items:center;align-content:center;gap:5px;text-align:center;border:1px dashed var(--line-strong);border-radius:14px;background:var(--surface);color:var(--muted); }
.library-empty > span { font-size:30px;color:var(--accent); }
.library-empty strong { color:var(--text); }
.library-empty p { margin:0;font-size:11px; }

.book-shell { width:min(1220px,calc(100% - 28px)); }
.book-panel { min-height:126px;padding:12px 16px;display:grid;grid-template-columns:76px minmax(0,1fr);justify-content:stretch; }
.book-panel-cover { width:70px;height:98px;display:grid;place-items:center;overflow:hidden;border-radius:9px;background:var(--surface-2);box-shadow:0 7px 18px rgba(13,50,42,.14); }
.book-panel-cover img { width:100%;height:100%;object-fit:contain;background:#fff; }
.book-panel-copy { min-width:0;display:grid;align-content:center; }
.book-panel h1 { margin:2px 0;font-size:clamp(21px,2.4vw,29px);white-space:nowrap;overflow:hidden;text-overflow:ellipsis; }
.book-panel-meta { margin:1px 0 8px; }
.book-panel-progress { display:grid;grid-template-columns:minmax(130px,380px) auto;align-items:center;gap:10px;color:var(--muted);font-size:10px; }
.chapter-list { grid-template-columns:repeat(2,minmax(0,1fr));gap:8px; }
.chapter-card { min-height:96px;padding:11px 13px;gap:8px;border-radius:13px; }
.chapter-card:hover { transform:translateY(-1px); }
.chapter-card.loading { cursor:wait;opacity:.72;background:linear-gradient(90deg,var(--surface),var(--surface-2),var(--surface));background-size:220% 100%;animation:content-pulse 1.2s ease infinite; }
.chapter-main { min-width:0;display:flex;flex-direction:column; }
.chapter-card h3 { margin:2px 0 7px;font-size:14px;line-height:1.18;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden; }
.chapter-meta { gap:8px;font-size:9px;white-space:nowrap; }
.chapter-card .progress-track { margin-top:auto; }
.chapter-count { font-size:15px; }

.reader-topnav { padding:9px 11px; }
.chapter-strip-head { margin-bottom:7px; }
.chapter-strip-head > div { min-width:0;display:flex;align-items:baseline;gap:10px; }
.chapter-strip-head strong { max-width:min(55vw,720px);overflow:hidden;text-overflow:ellipsis;white-space:nowrap; }
.chapter-reset-button { min-height:32px;padding:0 10px;flex:none;border:1px solid color-mix(in srgb,var(--wrong) 42%,var(--line));border-radius:9px;background:color-mix(in srgb,var(--wrong-soft) 55%,var(--surface));color:var(--wrong);font-size:10px;font-weight:900; }
.number-strip { flex-wrap:nowrap;overflow-x:auto;overscroll-behavior-x:contain;padding:3px 2px 7px;scrollbar-width:thin; }
.number-chip { width:31px;height:31px;min-width:31px;border-radius:9px; }
.reader-card { touch-action:pan-y; }
.reader-toolbar { align-items:flex-start; }
.marker-row { flex-wrap:wrap;justify-content:flex-end; }
.tool-word { min-height:34px;display:inline-flex;align-items:center;gap:5px; }
.tool-word.comparison-tool.active { color:#fff;background:linear-gradient(180deg,#2f7df5,#155ed0);border-color:#1458c3;box-shadow:0 3px 0 #0d469f,0 7px 13px rgba(24,100,210,.22); }
.tool-word.comparison-tool:active { transform:translateY(2px);box-shadow:0 1px 0 #0d469f; }
.tool-word.flag { color:var(--flag); }
.tool-word.reset-tool { color:var(--wrong); }
.reader-content,.reader-content * { -webkit-user-select:text;user-select:text; }
.reader-toolbar button,.reader-inline-nav button,.number-strip button,.option-letter { -webkit-user-select:none;user-select:none; }
.vignette-section { margin-top:18px; }
.option { cursor:pointer;-webkit-user-select:text;user-select:text; }
.option[aria-disabled="true"] { cursor:text;opacity:1; }
.option-text { min-width:0;max-width:100%;flex:1 1 auto;white-space:normal;overflow-wrap:anywhere;word-break:break-word;cursor:text; }
.reveal-answer-box { margin-top:15px;padding:14px;display:grid;gap:12px;border:1px solid var(--line);border-radius:13px;background:var(--surface-2); }
.reveal-answer-box > div:last-child { display:flex;align-items:center;justify-content:space-between;gap:12px;color:var(--muted);font-size:11px;line-height:1.45; }
.reveal-answer-button { min-width:136px;flex:none; }
.reveal-source-options { display:grid;gap:6px; }
.reveal-source-options > div { padding:8px 10px;display:grid;grid-template-columns:28px minmax(0,1fr);gap:8px;border:1px solid var(--line);border-radius:9px;background:var(--surface);font-family:var(--reader-family);font-size:calc(var(--reader-size) * .72);line-height:1.45;user-select:text; }
.reveal-source-options b { color:var(--accent); }
mark.selected-highlight { outline:0;box-shadow:none; }
mark { cursor:pointer; }

.content-loading-card { min-height:150px;margin-top:5vh;padding:22px;display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:16px; }
.content-loading-card h1 { margin:0 0 4px;font-size:22px; }
.content-loading-card p { margin:0;color:var(--muted);font-size:12px;line-height:1.5; }
.content-loading-mark { width:46px;height:46px;display:grid;place-items:center;border-radius:14px;background:var(--accent-soft);color:var(--accent);font-size:24px;font-weight:900; }
.content-loading-pulse { width:34px;height:34px;border:3px solid var(--line);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite; }
@keyframes content-pulse { 0%,100% { background-position:0 0; } 50% { background-position:100% 0; } }

.comparison-page { width:min(980px,calc(100% - 28px)); }
.comparison-page .mode-head p { max-width:720px;color:var(--muted);font-size:12px;line-height:1.55; }
.comparison-list { display:grid;gap:13px; }
.comparison-card { overflow:hidden;padding:0; }
.comparison-card > header { padding:13px 16px;display:flex;align-items:center;justify-content:space-between;gap:12px;border-bottom:1px solid var(--line);background:var(--surface-2); }
.comparison-card > header span { color:var(--accent);font-size:9px;font-weight:850; }
.comparison-card > header h2 { margin:2px 0 0;font-size:17px; }
.comparison-actions { display:flex;align-items:center;justify-content:flex-end;gap:6px;flex-wrap:wrap; }
.comparison-lead,.comparison-stem { margin:0;padding:16px 18px 0;font-family:var(--reader-family);font-size:calc(var(--reader-size) * .8);font-weight:var(--reader-weight);line-height:1.55;user-select:text; }
.comparison-stem { padding-bottom:12px; }
.comparison-options { margin:0;padding:0 18px 14px;display:grid;gap:9px;list-style:none; }
.comparison-option { padding:10px 12px;display:grid;grid-template-columns:30px minmax(0,1fr);align-items:start;gap:8px;border:1px solid var(--line);border-radius:10px;background:var(--surface);font-family:var(--reader-family);font-size:calc(var(--reader-size) * .7);line-height:1.45;user-select:text; }
.comparison-option b { width:28px;height:28px;display:grid;place-items:center;border-radius:8px;background:var(--surface-2);color:var(--accent); }
.comparison-option.correct { border-color:color-mix(in srgb,var(--correct) 48%,var(--line));background:color-mix(in srgb,var(--correct-soft) 32%,var(--surface)); }
.comparison-answer,.comparison-explanation { margin:0 18px 14px;padding:12px 14px;border-radius:11px;background:var(--accent-soft); }
.comparison-explanation { background:var(--surface-2); }
.comparison-answer h3,.comparison-explanation h3 { margin:0 0 5px;color:var(--accent);font-size:11px;text-transform:uppercase;letter-spacing:.07em; }
.comparison-answer p,.comparison-explanation p { margin:0;font-family:var(--reader-family);font-size:calc(var(--reader-size) * .68);line-height:1.55;user-select:text; }
.remove-comparison { color:var(--wrong); }
.sync-notice { margin-bottom:12px;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:var(--surface-2);color:var(--muted);font-size:11px; }

.admin-page { width:min(1280px,calc(100% - 28px)); }
.admin-filterbar { margin:-2px 0 14px;display:grid;grid-template-columns:minmax(220px,1.4fr) repeat(3,minmax(130px,.65fr));gap:8px; }
.admin-filterbar input,.admin-filterbar select { width:100%;min-height:40px;padding:0 11px;border:1px solid var(--line);border-radius:10px;background:var(--surface-2);font-size:10px;font-weight:750; }
.admin-users { gap:8px; }
.admin-user { display:block;padding:0;overflow:hidden;border-radius:15px;background:var(--surface); }
.admin-user[open] { border-color:color-mix(in srgb,var(--accent) 48%,var(--line));box-shadow:0 10px 25px rgba(12,48,39,.08); }
.admin-user-summary { min-height:72px;padding:10px 13px;display:grid;grid-template-columns:44px minmax(0,1fr) auto auto auto;align-items:center;gap:11px;list-style:none;cursor:pointer; }
.admin-user-summary::-webkit-details-marker { display:none; }
.admin-avatar { width:42px;height:42px;display:grid;place-items:center;border:3px solid var(--line);border-radius:14px;background:linear-gradient(145deg,var(--surface-2),var(--surface-3));font-size:11px;font-weight:950; }
.admin-avatar.online { border-color:#19a76e;box-shadow:0 0 0 3px rgba(25,167,110,.13); }
.admin-identity { min-width:0;display:grid;gap:2px; }
.admin-identity strong,.admin-identity span,.admin-identity small { overflow:hidden;text-overflow:ellipsis;white-space:nowrap; }
.admin-identity span,.admin-identity small { color:var(--muted);font-size:10px; }
.admin-user-metrics { min-width:68px;text-align:center;display:grid; }
.admin-user-metrics b { font-size:14px; }
.admin-user-metrics small { color:var(--muted);font-size:8px;text-transform:uppercase;letter-spacing:.08em; }
.plan-pill { padding:6px 9px;border-radius:999px;background:var(--surface-2);color:var(--muted);font-size:9px;font-weight:900; }
.plan-pill.premium { background:#fff0b0;color:#785000; }
.admin-chevron { color:var(--muted);transition:transform .2s ease; }
.admin-user[open] .admin-chevron { transform:rotate(180deg); }
.admin-user-actions { padding:12px 13px 14px;display:grid;gap:10px;border-top:1px solid var(--line);background:var(--surface-2); }
.subscription-current { display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:7px; }
.subscription-current > span { padding:8px 10px;display:grid;gap:2px;border:1px solid var(--line);border-radius:10px;background:var(--surface); }
.subscription-current small { font-size:8px!important;text-transform:uppercase;letter-spacing:.07em; }
.subscription-current strong { font-size:11px; }
.subscription-fields { display:grid;grid-template-columns:1.15fr 1fr 1fr;gap:8px; }
.admin-date { font-size:9px; }
.admin-date select,.admin-date input { width:100%;min-height:38px!important; }
.admin-date input[readonly] { background:color-mix(in srgb,var(--surface) 60%,var(--surface-2));color:var(--muted); }
.subscription-buttons { display:flex;justify-content:flex-end;gap:8px; }
.danger-soft { color:var(--wrong);border-color:color-mix(in srgb,var(--wrong) 40%,var(--line));background:color-mix(in srgb,var(--wrong-soft) 48%,var(--surface)); }
.admin-user-owner { padding:0;background:color-mix(in srgb,var(--accent-soft) 60%,var(--surface)); }
.admin-user-owner .admin-permanent-badge { margin:0 13px 12px; }
.admin-chapters { grid-template-columns:repeat(2,minmax(0,1fr));gap:7px; }
.admin-chapter { min-height:64px;padding:8px 10px;gap:10px;border-radius:11px; }
.admin-chapter strong { font-size:11px; }
.admin-chapter small { font-size:9px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis; }
.admin-chapter select { min-height:34px;min-width:92px;font-size:10px; }

@media (max-width:900px) {
  .app-header { gap:7px;padding-left:8px;padding-right:8px; }
  .header-library-switch { display:none; }
  .header-center { min-width:0; }
  .header-crumbs { text-align:left;font-size:10px; }
  .library-home-button b { display:none; }
  .library-home-button { width:40px;padding:0;justify-content:center; }
  .library-grid { grid-template-columns:1fr; }
  .library-mobile-tabs { display:grid;position:sticky;top:calc(var(--header-height) + 6px);z-index:30; }
  .library-panel { display:none; }
  .library-panel.mobile-active { display:block; }
  .chapter-list { grid-template-columns:1fr; }
  .admin-chapters { grid-template-columns:1fr; }
  .admin-filterbar { grid-template-columns:repeat(2,minmax(0,1fr)); }.admin-filterbar input { grid-column:1/-1; }
}

@media (max-width:560px) {
  .app-header { grid-template-columns:auto minmax(0,1fr) auto; }
  .header-left { gap:4px; }
  .header-left .icon-button { width:34px;height:34px;min-width:34px; }
  .search-button { display:none; }
  .header-right { gap:5px; }
  .account-button,.avatar-sticker { width:36px;height:36px; }
  .avatar-sticker { border-radius:13px 13px 13px 5px;font-size:9px; }
  .header-center .header-crumbs { display:none; }
  .library-shell { width:calc(100% - 16px);padding-top:10px; }
  .library-panel { padding:10px; }
  .library-panel > header h1 { font-size:19px; }
  .book-open { min-height:112px;grid-template-columns:68px minmax(0,1fr);gap:10px;padding-left:7px; }
  .book-cover-image { width:68px;height:94px; }
  .tile-body { min-height:94px; }
  .tile-heading h2 { font-size:14px; }
  .book-panel { min-height:112px;grid-template-columns:62px minmax(0,1fr);padding:10px; }
  .book-panel-cover { width:56px;height:82px; }
  .book-panel .eyebrow { display:none; }
  .book-panel h1 { font-size:20px; }
  .book-panel-progress { grid-template-columns:1fr;gap:4px; }
  .chapter-strip-head { flex-direction:row;align-items:center; }
  .chapter-strip-head > div { display:grid;gap:2px; }
  .chapter-strip-head span { font-size:9px; }
  .chapter-reset-button { padding:0 8px;font-size:9px; }
  .reader-toolbar { display:grid;gap:8px; }
  .marker-row { justify-content:flex-start; }
  .tool-word { min-height:32px;padding:0 7px;font-size:9px;gap:4px; }
  .content-loading-card { grid-template-columns:auto minmax(0,1fr);padding:16px; }.content-loading-card .button,.content-loading-pulse { grid-column:1/-1;justify-self:stretch; }
  .comparison-page { width:calc(100% - 16px); }.comparison-card > header { align-items:flex-start;flex-direction:column; }.comparison-actions { width:100%;justify-content:flex-start; }.comparison-lead,.comparison-stem { padding-left:13px;padding-right:13px; }.comparison-options { padding-left:13px;padding-right:13px; }.comparison-answer,.comparison-explanation { margin-left:13px;margin-right:13px; }
  .admin-page { width:calc(100% - 16px); }
  .admin-filterbar { grid-template-columns:1fr; }.admin-filterbar input { grid-column:auto; }
  .admin-section { padding:12px; }
  .admin-user-summary { grid-template-columns:38px minmax(0,1fr) auto;gap:8px; }
  .admin-avatar { width:36px;height:36px;border-radius:12px; }
  .admin-user-metrics { display:none; }
  .plan-pill { grid-column:3;grid-row:1; }
  .admin-chevron { display:none; }
  .subscription-current,.subscription-fields { grid-template-columns:1fr; }
  .subscription-buttons { flex-direction:column; }
}

/* Unified library: the two shelves are separate views at every width. */
.library-mobile-tabs { display:grid;position:sticky;top:calc(var(--header-height) + 6px);z-index:30;margin-bottom:13px; }
.library-grid { display:block; }
.library-panel { display:none; }
.library-panel.mobile-active { display:block; }
.library-books { display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:13px; }
.book-open { min-height:0;padding:10px;display:flex;flex-direction:column;gap:8px;text-align:left; }
.book-cover-image { width:min(100%,140px);height:auto;aspect-ratio:2 / 3;margin:0 auto;background:transparent; }
.book-cover-image img { background:transparent; }
.tile-body { width:100%;min-height:0;padding:0; }
.tile-heading h2 { font-size:14px; }
.tile-heading p { margin-bottom:9px; }
.library-books-icon { display:inline-grid;place-items:center;font-size:19px;line-height:1;filter:drop-shadow(0 2px 0 color-mix(in srgb,var(--accent) 25%,transparent)); }
.reading-comfort-field { gap:6px; }
.reading-comfort-field small { color:var(--muted);font-size:11px;font-weight:600;line-height:1.35; }

/* The original Light and Dark variables stay above. Comfort is an independent override. */
html[data-reading-comfort="on"] {
  color-scheme:light;
  --bg:#EAF4F8; --surface:#EFF7F9; --surface-2:#E6F4EB; --surface-3:#EDF8F1;
  --text:#14221D; --muted:#65736D; --line:#CFDDE1; --line-strong:#B7C9CE;
  --accent:#0B6942; --accent-strong:#0B6942; --accent-soft:#DCEFE4;
  --correct:#0B6942; --correct-soft:#DCEFE4; --wrong:#B32632; --wrong-soft:#F7E0E2;
  --shadow:0 14px 36px rgba(50,83,86,.08);
}
html[data-theme="dark"][data-reading-comfort="on"] {
  color-scheme:dark;
  --bg:#101A17; --surface:#18231F; --surface-2:#15211D; --surface-3:#18251F;
  --text:#DCE6E1; --muted:#9FADA7; --line:#304039; --line-strong:#43574E;
  --accent:#6BC892; --accent-strong:#6BC892; --accent-soft:#1B3A2A;
  --correct:#6BC892; --correct-soft:#1B3A2A; --wrong:#E98A94; --wrong-soft:#43272B;
  --shadow:0 18px 46px rgba(0,0,0,.22);
}
html[data-reading-comfort="on"] .app-header { background:color-mix(in srgb,var(--bg) 82%,var(--surface));border-color:var(--line); }
html[data-reading-comfort="on"] .reader-topnav { background:color-mix(in srgb,var(--bg) 70%,var(--surface)); }
html[data-reading-comfort="on"] .reader-card { background:var(--surface-2); }
html[data-reading-comfort="on"] .reader-toolbar { background:color-mix(in srgb,var(--surface-2) 72%,var(--surface));margin:-4px -6px 0;padding:8px 6px 12px;border-radius:10px 10px 0 0; }
html[data-reading-comfort="on"] .option { background:var(--surface-3); }
html[data-reading-comfort="on"] .option.correct { background:var(--correct);border-color:var(--correct);color:#fff; }
html[data-reading-comfort="on"] .option.correct .option-letter { background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.55);color:#fff; }
html[data-reading-comfort="on"] .option.incorrect { background:var(--wrong-soft);border-color:var(--wrong);color:#111; }
html[data-reading-comfort="on"] .option.incorrect .option-letter { background:var(--wrong);border-color:var(--wrong);color:#fff; }
html[data-theme="dark"][data-reading-comfort="on"] .option.incorrect { color:var(--text); }
html[data-theme="dark"][data-reading-comfort="on"] .option.incorrect .option-letter { color:#101A17; }
html[data-theme="dark"][data-reading-comfort="on"] .option.correct { background:#176A49;border-color:#27805D;color:#fff; }
html[data-theme="dark"][data-reading-comfort="on"] .option.correct .option-letter { color:#fff; }

/* Question navigation is a horizontal sequence of two-row, thirty-question pages. */
.number-strip { display:flex;flex-wrap:nowrap;align-items:start;gap:10px;overflow-x:auto;overscroll-behavior-x:contain;padding:3px 2px 8px;scrollbar-width:thin; }
.number-page { flex:0 0 auto;display:grid;grid-auto-flow:row;grid-template-columns:repeat(var(--number-columns,15),31px);grid-template-rows:repeat(2,31px);gap:6px; }
.number-chip { width:31px;height:31px;min-width:31px; }
.reader-context-head { margin-bottom:0;border-bottom:0;border-radius:13px 13px 0 0;padding-bottom:4px; }
.reader-context-head .chapter-strip-head { margin-bottom:0; }
.reader-number-nav { position:static;margin-bottom:10px;padding:3px 11px 8px;border-top:0;border-radius:0 0 13px 13px;background:var(--surface); }
.practice-topnav.reader-number-nav { border:1px solid var(--line);border-radius:13px; }

/* Answer feedback stays high-contrast in every theme. */
.option.correct { background:var(--correct);border-color:var(--correct);color:#fff; }
.option.correct .option-letter { background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.65);color:#fff; }
.option.incorrect { background:var(--wrong);border-color:var(--wrong);color:#fff; }
.option.incorrect .option-letter { background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.65);color:#fff; }

/* Compact reader rhythm: content remains responsive but unnecessary empty space is removed. */
.reader-card { padding-bottom:18px; }
.reader-toolbar { gap:8px;padding-bottom:8px; }
.reader-content { line-height:1.55; }
.text-section { margin:14px 0; }
.lead-in { padding:12px 14px; }
.options { gap:6px;margin:10px 0; }
.option { min-height:0;padding:9px 12px; }
.reader-inline-nav { margin:12px auto;padding-top:10px; }
.nav-button { min-height:44px;padding:0 14px; }
.answer-area { gap:8px;margin-top:2px; }
.answer-section { padding:12px 14px; }
.answer-section.answer-summary { display:flex;align-items:center;gap:8px; }
.answer-section.answer-summary h3,.answer-section.answer-summary p { margin:0; }
.answer-section.answer-summary h3 { white-space:nowrap; }
.answer-section.answer-summary p { font-weight:850; }
.explanation-head { margin-bottom:8px; }
.explanation-head .explanation-tools { width:100%; }

/* Keep the chrome quiet but visually distinct from the page. */
.app-header { background:color-mix(in srgb,var(--surface) 92%,var(--text)); }

@media (max-width:1240px) { .library-books { grid-template-columns:repeat(3,minmax(0,1fr)); } }
@media (max-width:880px) { .library-books { grid-template-columns:repeat(2,minmax(0,1fr)); } }
@media (max-width:560px) {
  .library-books { grid-template-columns:repeat(2,minmax(0,1fr));gap:9px; }
  .book-open { min-height:214px;padding:8px;gap:7px; }
  .book-cover-image { width:min(100%,84px);height:116px; }
  .tile-heading h2 { font-size:12px; }
  .tile-heading p { margin:3px 0 6px;font-size:8px; }
  .tile-meta { gap:4px;font-size:8px; }
  .tile-stats { font-size:8px; }
  .number-page { grid-template-columns:repeat(var(--number-columns,15),29px);grid-template-rows:repeat(2,29px);gap:5px; }
  .number-chip { width:29px;height:29px;min-width:29px;font-size:10px; }
}


/* IQMentis 9.1 local-first reader refinements */
.answer-section.answer-summary {
  display:grid;
  align-items:start;
  gap:6px;
}
.answer-section.answer-summary h3 {
  margin:0;
  white-space:normal;
}
.answer-section.answer-summary p {
  margin:0;
  font-weight:850;
}
.explanation-tools {
  display:flex;
  flex-wrap:wrap;
  align-items:center;
}
.explanation-tools > .mini-tool:not(.explanation-note-copy),
.explanation-tools > .explanation-highlight-wrap {
  flex:1 1 118px;
}
.mini-tool.explanation-note-copy {
  width:36px;
  min-width:36px;
  min-height:36px;
  flex:0 0 36px;
  display:grid;
  place-items:center;
  padding:0;
  border-radius:9px;
}
.mini-tool.explanation-note-copy svg {
  width:19px;
  height:19px;
  fill:none;
  stroke:currentColor;
  stroke-width:1.9;
  stroke-linecap:round;
  stroke-linejoin:round;
}

/* Bounded Administration: separate views, paginated lists, and lazy user detail. */
.admin-area-tabs { display:flex;gap:8px;margin:0 0 14px; }
.admin-area-tabs .button { min-width:150px; }
.admin-section-head small { color:var(--muted);font-size:10px;font-weight:800; }
.admin-list-status { min-height:34px;margin:0 0 10px;padding:9px 11px;border:1px solid var(--line);border-radius:10px;background:var(--surface-2);color:var(--muted);font-size:10px;line-height:1.45; }
.admin-load-more { width:100%;margin-top:12px; }
.admin-detail-loading,.admin-detail-error { padding:11px;border:1px dashed var(--line-strong);border-radius:10px;color:var(--muted);font-size:10px;text-align:center; }
.admin-detail-error { color:var(--wrong);border-color:color-mix(in srgb,var(--wrong) 45%,var(--line)); }
.admin-user-actions[aria-busy="true"],.admin-chapter select:disabled { opacity:.68; }

@media (max-width:560px) {
  .admin-area-tabs { display:grid;grid-template-columns:1fr 1fr; }
  .admin-area-tabs .button { min-width:0;padding:0 8px;font-size:10px; }
  .admin-section-head { align-items:flex-start; }
}

;
/* ---- answer-choice-ui-fix.css ---- */
/* IQMentis answer-choice interaction refinement.
   Grading owns the interior color: correct = green, selected wrong = red.
   Hover/touch/text-selection never changes that grading color; interaction adds only a soft yellow outer outline. */

.option {
  grid-template-columns: 38px minmax(0, 1fr) auto;
}

/* Before grading: keep the option interior neutral. Hover/draft selection gets only a soft yellow outline. */
.option:hover:not([aria-disabled="true"]):not(.correct):not(.incorrect),
.option.active {
  background: var(--surface);
  border-color: color-mix(in srgb, #d6a51f 58%, var(--line-strong));
  box-shadow: 0 0 0 3px color-mix(in srgb, #d6a51f 14%, transparent);
  color: var(--text);
}

.option.active .option-letter {
  background: var(--surface-2);
  color: color-mix(in srgb, #d6a51f 78%, var(--text));
  border: 1px solid color-mix(in srgb, #d6a51f 58%, transparent);
}

/* After grading: the correct answer is clearly green. */
.option.correct,
.option.correct[aria-pressed="true"] {
  background: var(--correct-soft);
  border: 2px solid var(--correct);
  color: var(--correct);
  box-shadow: none;
}

.option.correct .option-letter,
.option.correct[aria-pressed="true"] .option-letter {
  background: color-mix(in srgb, var(--correct) 14%, var(--surface-2));
  color: var(--correct);
  border: 1px solid var(--correct);
}

/* After grading: only the selected wrong answer is red. */
.option.incorrect,
.option.incorrect[aria-pressed="true"] {
  background: var(--wrong-soft);
  border: 2px solid var(--wrong);
  color: var(--wrong);
  box-shadow: none;
}

.option.incorrect .option-letter,
.option.incorrect[aria-pressed="true"] .option-letter {
  background: color-mix(in srgb, var(--wrong) 14%, var(--surface-2));
  color: var(--wrong);
  border: 1px solid var(--wrong);
}

/* Other locked options remain completely neutral after grading. */
.option[aria-disabled="true"]:not(.correct):not(.incorrect) {
  background: var(--surface);
  border-color: var(--line-strong);
  color: var(--text);
  box-shadow: none;
}

/* Hover/touch after grading never introduces a new green/red transparency.
   It preserves the existing graded interior and adds only a light yellow outside ring. */
.option.correct:hover,
.option.correct:focus-visible {
  background: var(--correct-soft);
  border-color: var(--correct);
  color: var(--correct);
  box-shadow: 0 0 0 3px color-mix(in srgb, #d6a51f 14%, transparent);
}

.option.incorrect:hover,
.option.incorrect:focus-visible {
  background: var(--wrong-soft);
  border-color: var(--wrong);
  color: var(--wrong);
  box-shadow: 0 0 0 3px color-mix(in srgb, #d6a51f 14%, transparent);
}

.option[aria-disabled="true"]:not(.correct):not(.incorrect):hover,
.option[aria-disabled="true"]:not(.correct):not(.incorrect):focus-visible {
  background: var(--surface);
  border-color: var(--line-strong);
  color: var(--text);
  box-shadow: 0 0 0 3px color-mix(in srgb, #d6a51f 14%, transparent);
}

/* Clear result icon at the far right after grading. */
.option.correct::after,
.option.incorrect::after {
  justify-self: end;
  align-self: center;
  min-width: 30px;
  padding-left: 8px;
  font-family: system-ui, -apple-system, "Segoe UI Emoji", "Apple Color Emoji", sans-serif;
  font-size: 22px;
  line-height: 1;
  text-align: center;
  user-select: none;
  -webkit-user-select: none;
}
.option.correct::after { content: "✅"; }
.option.incorrect::after { content: "❌"; }

@media (max-width: 640px) {
  .option.correct::after,
  .option.incorrect::after {
    min-width: 26px;
    padding-left: 5px;
    font-size: 19px;
  }
}

/* IQMentis focused reader polish: full-page search, quiet note status, stable settings. */

html.iqm-overlay-open,
html.iqm-settings-open,
html.iqm-overlay-open body,
html.iqm-settings-open body {
  overflow: hidden;
}

/* Full-page question search. Uses the same defined IQMentis palette as the Reader. */
.iqm-search-page {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 0;
  background: var(--bg);
  color: var(--text);
}

.iqm-search-appbar {
  position: sticky;
  top: 0;
  z-index: 2;
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: calc(var(--header-safe-top) + 7px) 12px 7px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface) 96%, transparent);
  backdrop-filter: blur(14px);
}

.iqm-search-appbar-left {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 10px;
}

.iqm-search-appbar-left > div {
  min-width: 0;
  display: grid;
  gap: 1px;
}

.iqm-search-appbar-left span {
  color: var(--muted);
  font-size: 9px;
  font-weight: 850;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.iqm-search-appbar-left strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 14px;
}

.iqm-search-library {
  flex: none;
}

.iqm-search-main {
  width: min(980px, calc(100% - 24px));
  margin: 0 auto;
  padding: 18px 0 70px;
  overflow: auto;
  overscroll-behavior: contain;
}

.iqm-search-fields {
  display: grid;
  gap: 10px;
}

.iqm-search-main {
  flex: 1;
  min-height: 0;
}

.iqm-search-input-wrap {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 9px;
  padding: 0 13px;
  border: 1px solid var(--line-strong);
  border-radius: 13px;
  background: var(--surface);
  box-shadow: 0 6px 20px rgba(0,0,0,.04);
}

.iqm-search-input-wrap > span {
  color: var(--accent);
  font-size: 20px;
  font-weight: 800;
}

.iqm-search-input-wrap input {
  width: 100%;
  min-width: 0;
  min-height: 50px;
  padding: 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: 16px;
}

.iqm-search-status {
  min-height: 28px;
  padding: 8px 3px 2px;
  color: var(--muted);
  font-size: 12px;
}

.iqm-search-results {
  display: grid;
  gap: 18px;
  margin-top: 4px;
}

.iqm-search-card {
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 15px;
  background: var(--surface);
  box-shadow: 0 9px 24px rgba(0,0,0,.045);
}

.iqm-search-card > header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 14px;
  border-bottom: 1px solid var(--line);
  background: var(--surface-2);
}

.iqm-search-sequence {
  display: grid;
  place-items: center;
  flex: 0 0 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-weight: 900;
}

.iqm-search-card > header div {
  min-width: 0;
  display: grid;
  gap: 2px;
}

.iqm-search-card > header strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 13px;
}

.iqm-search-card > header small {
  color: var(--muted);
  font-size: 10px;
}

.iqm-search-question {
  padding: 15px 15px 7px;
  font-size: 15px;
  font-weight: 650;
  line-height: 1.58;
}

.iqm-search-question p {
  margin: 0 0 9px;
}

.iqm-search-options {
  display: grid;
  gap: 9px;
  margin: 5px 15px 13px;
  padding: 0;
  list-style: none;
}

.iqm-search-options li {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 8px;
  align-items: start;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface-2);
  color: var(--text);
  line-height: 1.45;
}

.iqm-search-options li b {
  color: var(--muted);
}

.iqm-search-options li.is-correct {
  border-color: color-mix(in srgb, var(--correct) 60%, var(--line));
  box-shadow: inset 4px 0 0 var(--correct);
  background: color-mix(in srgb, var(--correct-soft) 45%, var(--surface));
}

.iqm-search-options li.is-correct b {
  color: var(--correct);
}

.iqm-search-card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 12px 15px 15px;
}

/* Search explanations stay available independently of answer highlighting. */
.iqm-search-explanation {
  min-width:0;
  margin:16px 15px 0;
  border:1px solid var(--line);
  border-radius:10px;
  background:color-mix(in srgb,var(--surface-2) 95%,var(--text) 5%);
  color:var(--text);
}
.iqm-search-explanation > summary {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  min-height:44px;
  padding:8px 12px;
  list-style:none;
  cursor:pointer;
  direction:ltr;
}
.iqm-search-explanation > summary::-webkit-details-marker { display:none; }
.iqm-search-explanation > summary:focus-visible {
  outline:2px solid var(--accent);
  outline-offset:2px;
  border-radius:10px;
}
.iqm-search-explanation-label {
  flex:1;
  min-width:0;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.iqm-search-explanation .sr-only {
  position:absolute;
  width:1px;
  height:1px;
  padding:0;
  margin:-1px;
  overflow:hidden;
  clip-path:inset(50%);
  white-space:nowrap;
}
.iqm-search-explanation-toggle {
  flex-shrink:0;
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--muted);
  font-size:12px;
  font-weight:600;
}
.iqm-search-explanation-collapse { display:none; }
.iqm-search-explanation[open] .iqm-search-explanation-expand { display:none; }
.iqm-search-explanation[open] .iqm-search-explanation-collapse { display:inline; }
.iqm-search-explanation[open] .iqm-search-explanation-chevron { transform:rotate(180deg); }
.iqm-search-explanation-full {
  margin:0;
  padding:10px 12px 12px;
  border-top:1px solid var(--line);
  white-space:pre-wrap;
  overflow-wrap:anywhere;
  line-height:1.55;
}
#iqmSearchPage .iqm-search-explanation-full {
  font-family:var(--reader-family) !important;
  font-size:var(--reader-size) !important;
  font-weight:var(--reader-weight) !important;
}

.iqm-search-action {
  min-height: 38px;
  padding: 0 12px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  font-weight: 800;
  font-size: 11px;
}

.iqm-search-action:hover,
.iqm-search-action:focus-visible {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.iqm-search-action.active-flag {
  border-color: color-mix(in srgb, var(--flag) 58%, var(--line));
  background: var(--flag-soft);
  color: var(--flag);
}

.iqm-search-action.active-compare {
  border-color: color-mix(in srgb, var(--accent) 58%, var(--line));
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.iqm-search-more {
  display: block;
  margin: 18px auto 0;
  min-width: 160px;
}

.iqm-search-action.speaking {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.iqm-search-action.open-book {
  margin-left: auto;
}

/* iPad-safe settings presentation. The native modal top-layer is avoided; a fixed
   IQMentis backdrop is used instead so selects/buttons remain fully interactive. */
.iqm-settings-backdrop {
  position: fixed;
  inset: 0;
  z-index: 188;
  background: rgba(9,19,16,.56);
  backdrop-filter: blur(4px);
}

.settings-dialog.iqm-settings-stable[open] {
  position: fixed;
  top: max(5vh, env(safe-area-inset-top, 0px));
  left: 50%;
  right: auto;
  bottom: auto;
  z-index: 190;
  width: min(680px, calc(100vw - 24px));
  max-height: min(90svh, 880px);
  margin: 0;
  transform: translateX(-50%);
  display: block;
  overflow: hidden;
}

.settings-dialog.iqm-settings-stable::backdrop {
  display: none;
  background: transparent;
  backdrop-filter: none;
}

.settings-dialog.iqm-settings-stable .dialog-body {
  max-height: calc(min(90svh, 880px) - 142px);
  -webkit-overflow-scrolling: touch;
}

.settings-dialog.iqm-settings-stable select,
.settings-dialog.iqm-settings-stable input,
.settings-dialog.iqm-settings-stable button {
  pointer-events: auto;
  touch-action: manipulation;
}

/* Notes are saved explicitly with Save note; routine draft/save labels stay quiet. */
#noteStatus {
  display: none !important;
}

.iqm-global-search-button {
  display: inline-grid !important;
}

@media (max-width: 700px) {
  .iqm-search-main {
    width: calc(100% - 14px);
    padding-top: 10px;
  }

  .iqm-search-appbar {
    padding-left: 8px;
    padding-right: 8px;
  }

  .iqm-search-appbar-left strong {
    max-width: 46vw;
    font-size: 12px;
  }

  .iqm-search-library b {
    display: none;
  }

  .iqm-search-card {
    border-radius: 12px;
  }

  .iqm-search-question {
    padding: 13px 11px 6px;
  }

  .iqm-search-options {
    margin-left: 11px;
    margin-right: 11px;
  }

  .iqm-search-options li {
    grid-template-columns: 26px 1fr;
  }

  .iqm-search-card-actions {
    padding-left: 11px;
    padding-right: 11px;
  }

  .iqm-search-action.open-book {
    margin-left: 0;
  }

  .settings-dialog.iqm-settings-stable[open] {
    top: max(2vh, env(safe-area-inset-top, 0px));
    width: calc(100vw - 14px);
    max-height: 94svh;
  }

  .settings-dialog.iqm-settings-stable .dialog-body {
    max-height: calc(94svh - 142px);
  }
}

/* ---- settings-stable.css ---- */
/* Native-dialog-free settings overlay for reliable iPad interaction. */
.iqm-settings-page {
  position: fixed;
  inset: 0;
  z-index: 220;
  display: grid;
  place-items: center;
  padding: max(14px, env(safe-area-inset-top, 0px)) 12px max(14px, env(safe-area-inset-bottom, 0px));
  background: rgba(7, 18, 15, .58);
  backdrop-filter: blur(4px);
  overflow: auto;
}

.iqm-settings-page.hidden { display: none !important; }

.iqm-settings-page #settingsForm {
  width: min(680px, 100%);
  max-height: min(90svh, 880px);
  display: flex;
  flex-direction: column;
  margin: auto;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 30px 100px rgba(0,0,0,.34);
  overflow: hidden;
  pointer-events: auto;
}

.iqm-settings-page .dialog-body {
  flex: 1 1 auto;
  min-height: 0;
  max-height: none;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
}

.iqm-settings-page select,
.iqm-settings-page input,
.iqm-settings-page button {
  pointer-events: auto;
  touch-action: manipulation;
}

html.iqm-settings-page-open,
html.iqm-settings-page-open body {
  overflow: hidden;
}

@media (max-width: 700px) {
  .iqm-settings-page {
    place-items: stretch;
    padding: max(8px, env(safe-area-inset-top, 0px)) 7px max(8px, env(safe-area-inset-bottom, 0px));
  }

  .iqm-settings-page #settingsForm {
    width: 100%;
    max-height: calc(100svh - max(16px, env(safe-area-inset-top, 0px) + env(safe-area-inset-bottom, 0px)));
    border-radius: 16px;
  }
}

;
/* ---- final-interface.css ---- */
/* IQMentis final interface baseline refinements.
   Keep the global question-search control visible on phones in both portrait and landscape.
   app.css intentionally hid .search-button below 560px; this final override preserves the
   now-established full-page search without changing any reader layout or study data. */

.app-header .header-left .search-wrap {
  display: block !important;
  flex: none;
}

.app-header .header-left .search-button,
.app-header .header-left .iqm-global-search-button {
  display: inline-grid !important;
  visibility: visible !important;
  opacity: 1 !important;
  flex: 0 0 auto;
}


/* Locked final reader adjustments: compact controls, stable selection, and unified navigation. */
.header-center .reader-crumbs {
  display: inline-flex !important;
  align-items: center;
  gap: 5px;
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  padding: 2px;
  scrollbar-width: none;
  text-overflow: clip;
}
.header-center .reader-crumbs::-webkit-scrollbar { display: none; }
.reader-crumbs > button,
.reader-crumbs > span {
  flex: 0 0 auto;
  min-height: 28px;
  padding: 0 9px;
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--surface-2);
  color: var(--accent-strong);
  font-size: 10px;
  font-weight: 850;
  white-space: nowrap;
}
.reader-crumbs > b {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 11px;
}

.tool-icon,
.icon-only-tool {
  width: 38px !important;
  min-width: 38px !important;
  padding: 0 !important;
  display: inline-grid !important;
  place-items: center;
}
.selected-read-tool,
.compact-tool {
  width: auto !important;
  min-width: 0 !important;
  padding-inline: 9px !important;
  display: inline-flex !important;
  align-items: center;
  justify-content: center;
  gap: 4px;
}
.highlight-brush {
  font-size: 17px !important;
  line-height: 1;
}
.explanation-tools {
  width: auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 7px;
}
.explanation-highlight-wrap {
  flex: 0 0 auto;
  display: inline-flex;
}
mark.selected-highlight {
  outline: 1px solid var(--accent) !important;
  outline-offset: 1px !important;
  box-shadow: none !important;
  border-radius: 3px !important;
}
.note-actions [data-action="save-note"].saved {
  border-color: var(--correct);
  background: var(--correct-soft);
  color: var(--correct);
}

.practice-topnav {
  margin-top: -2px;
  margin-bottom: 10px;
}
.practice-topnav .number-strip {
  padding: 4px;
}

.comparison-card > header {
  gap: 10px;
}
.comparison-actions {
  width: auto !important;
  max-width: 100%;
  display: flex !important;
  flex-wrap: nowrap !important;
  align-items: center;
  justify-content: flex-start !important;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: none;
}
.comparison-actions::-webkit-scrollbar { display: none; }
.comparison-actions .mini-tool {
  flex: 0 0 auto;
  width: auto;
  min-width: 0;
}
.comparison-page .mode-head {
  margin-bottom: 14px;
}

@media (max-width: 560px) {
  .app-header .header-center {
    display: flex !important;
  }
  .reader-crumbs > button,
  .reader-crumbs > span {
    min-height: 26px;
    padding-inline: 7px;
    font-size: 9px;
  }
  .marker-row {
    align-items: center;
  }
  .selected-read-tool span:last-child {
    display: inline;
  }
  .comparison-card > header {
    align-items: stretch;
  }
  .comparison-actions {
    align-self: stretch;
  }
}

/* Settings overlay parser recovery. */
.iqm-settings-page {
  position: fixed;
  inset: 0;
  z-index: 220;
  display: grid;
  background: rgba(7, 18, 15, .58);
  backdrop-filter: blur(4px);
  overflow: auto;
}

/* Owner/Administrator inline question text editor. */
.question-index-group {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: none;
}
.inline-question-edit-button {
  min-height: 30px;
  padding: 0 9px;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  border: 1px solid color-mix(in srgb, var(--accent) 48%, var(--line));
  border-radius: 9px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 10px;
  font-weight: 900;
}
.inline-question-edit-button:hover,
.inline-question-edit-button:focus-visible {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent-soft) 72%, var(--surface));
}
html.iqm-inline-editor-open,
html.iqm-inline-editor-open body {
  overflow: hidden;
}
.iqm-inline-question-editor {
  position: fixed;
  inset: 0;
  z-index: 360;
  display: grid;
  place-items: center;
  padding: max(12px, env(safe-area-inset-top, 0px)) 12px max(12px, env(safe-area-inset-bottom, 0px));
  background: rgba(7, 18, 15, .68);
  backdrop-filter: blur(5px);
}
.inline-question-editor-form {
  width: min(780px, 100%);
  max-height: min(94svh, 940px);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 30px 100px rgba(0,0,0,.38);
}
.inline-question-editor-head,
.inline-question-editor-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 17px;
  border-bottom: 1px solid var(--line);
}
.inline-question-editor-head h2,
.inline-question-editor-head p,
.inline-editor-status { margin: 0; }
.inline-question-editor-head h2 { font-size: 20px; }
.inline-question-editor-head p { margin-top: 2px;color: var(--muted);font-size: 10px; }
.inline-question-editor-body {
  min-height: 0;
  padding: 16px;
  display: grid;
  gap: 14px;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
}
.inline-question-editor-body textarea {
  width: 100%;
  min-height: 68px;
  resize: vertical;
  padding: 10px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: var(--surface-2);
  line-height: 1.45;
}
.inline-question-editor-body textarea:focus {
  border-color: var(--accent);
  outline: 3px solid color-mix(in srgb, var(--accent) 16%, transparent);
  background: var(--surface);
}
.inline-editor-locked {
  padding: 10px 12px;
  display: grid;
  grid-template-columns: auto minmax(0,1fr);
  gap: 9px;
  align-items: start;
  border: 1px solid color-mix(in srgb, var(--correct) 38%, var(--line));
  border-radius: 10px;
  background: color-mix(in srgb, var(--correct-soft) 38%, var(--surface));
  font-size: 10px;
  line-height: 1.45;
}
.inline-editor-locked span {
  padding: 3px 6px;
  border-radius: 999px;
  background: var(--correct);
  color: #fff;
  font-size: 8px;
  font-weight: 900;
  text-transform: uppercase;
}
.inline-editor-options {
  margin: 0;
  padding: 12px;
  display: grid;
  gap: 9px;
  border: 1px solid var(--line);
  border-radius: 12px;
}
.inline-editor-options legend { padding: 0 6px;font-size: 11px;font-weight: 900; }
.inline-editor-option {
  display: grid;
  grid-template-columns: 34px minmax(0,1fr);
  gap: 8px;
  align-items: start;
}
.inline-editor-option b {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: var(--accent-soft);
  color: var(--accent-strong);
}
.inline-editor-status { min-height: 18px;color: var(--wrong);font-size: 11px;font-weight: 750; }
.inline-question-editor-actions {
  justify-content: flex-end;
  border-top: 1px solid var(--line);
  border-bottom: 0;
}
.iqm-inline-question-editor.saving { cursor: wait; }

@media (max-width: 560px) {
  .inline-question-edit-button span { display: none; }
  .inline-question-edit-button { width: 30px;padding: 0;justify-content: center; }
  .iqm-inline-question-editor { place-items: stretch;padding: max(7px, env(safe-area-inset-top, 0px)) 7px max(7px, env(safe-area-inset-bottom, 0px)); }
  .inline-question-editor-form { max-height: calc(100svh - 14px);border-radius: 15px; }
  .inline-question-editor-body { padding: 12px; }
  .inline-question-editor-actions .button { padding-inline: 11px;font-size: 10px; }
}

/* Match explanation speech controls to the question toolbar. */
.explanation-tools > [data-action="read-explanation"],
.explanation-tools > [data-action="read-explanation-selected"] {
  flex: 0 0 auto;
}

/* Reversible question Skip state. Scoped to the existing reader controls only. */
.skip-tool { margin-inline-start:auto; }
.skip-tool.active {
  border-color:color-mix(in srgb,var(--muted) 62%,var(--line));
  background:var(--surface-2);
  color:var(--muted);
}
.skip-text { color:var(--muted); }
.number-chip.skipped {
  position:relative;
  border-color:color-mix(in srgb,var(--muted) 46%,var(--line));
  background:color-mix(in srgb,var(--surface-2) 72%,transparent);
  color:color-mix(in srgb,var(--muted) 72%,transparent);
  box-shadow:none;
}
.number-chip.skipped.current {
  outline-color:color-mix(in srgb,var(--accent-strong) 58%,var(--line));
  background:color-mix(in srgb,var(--surface-2) 82%,var(--accent-soft));
  color:var(--muted);
}
.number-chip .skip-mark {
  position:absolute;
  inset-block-start:-5px;
  inset-inline-end:-4px;
  width:14px;
  height:14px;
  display:grid;
  place-items:center;
  border:1px solid var(--surface);
  border-radius:50%;
  background:var(--muted);
  color:var(--surface);
  font:900 10px/1 Arial,sans-serif;
}
.option.skipped-muted,
.option.skipped-muted:hover,
.option.skipped-muted:focus-visible {
  border-color:var(--line);
  background:var(--surface-2);
  color:var(--muted);
  opacity:.56;
  box-shadow:none;
}
.option.skipped-muted .option-text { text-decoration:line-through; }
.option.skipped-muted .option-letter {
  border:1px solid var(--line);
  background:var(--surface-3);
  color:var(--muted);
}
.option.skipped-correct { opacity:1; }

/* 2026-09-23 interface refinement. Reader-only colors deliberately exclude auth. */
html[data-theme="light"][data-reading-comfort="off"] body:has(#app > .app-header) {
  --bg:#ffffff;
  --surface:#ffffff;
  --surface-2:#ffffff;
  --surface-3:#ffffff;
  --panel-sky:#ffffff;
  --reader-wash:#ffffff;
  --reader-wash-border:#293665;
  --option-surface:#ffffff;
  --text:#202b5c;
  --muted:#52608c;
  --line:#344273;
  --line-strong:#293665;
  --accent:#26366f;
  --accent-strong:#202b5c;
  --accent-soft:#f1f3ff;
  --shadow:0 10px 28px rgba(32,43,92,.065);
}

html[data-theme="light"][data-reading-comfort="on"] body:has(#app > .app-header) {
  --bg:#edf7fc;
  --surface:#edf7fc;
  --surface-2:#edf7fc;
  --surface-3:#edf7fc;
  --panel-sky:#edf7fc;
  --reader-wash:#edf7fc;
  --reader-wash-border:#293665;
  --option-surface:#edf7fc;
  --text:#202b5c;
  --muted:#52608c;
  --line:#344273;
  --line-strong:#293665;
  --accent:#26366f;
  --accent-strong:#202b5c;
  --accent-soft:#dfeafb;
  --shadow:0 10px 28px rgba(32,43,92,.07);
}

html[data-theme="light"][data-reading-comfort="off"] body:has(#app > .app-header) :is(
  .app-header,.app-frame,.content,.page-shell,.reader-shell,.side-drawer,.drawer-inner,
  .reader-topnav,.reader-card,.reader-content,.panel,.book-tile,.chapter-card,
  .answer-section,.note-card,.option,.number-chip,.tool-icon,.tool-word,.mini-tool,
  .button,.reader-crumbs > button,.settings-dialog
) {
  background-color:#ffffff;
}

html[data-theme="light"] body:has(#app > .app-header) :is(
  .reader-topnav,.reader-card,.reader-content,.panel,.book-tile,.chapter-card,
  .answer-section,.note-card,.option,.number-chip,.tool-icon,.tool-word,.mini-tool,
  .button,.reader-crumbs > button,.settings-dialog
) {
  border-color:var(--line-strong);
}

html[data-theme="light"] body:has(#app > .app-header) .header-left .icon-button {
  border-color:var(--line-strong);
  color:var(--text);
}

/* Keep the navigation fixed while the library or reader content scrolls independently. */
.app-frame .side-drawer {
  position:fixed;
  left:0;
  top:var(--header-height);
  z-index:70;
  width:var(--drawer-width);
  height:calc(100dvh - var(--header-height));
  transform:translateX(-100%);
  visibility:hidden;
  pointer-events:none;
  transition:transform .22s ease,visibility 0s linear .22s;
}
.app-frame > .content { grid-column:2; }
.app-frame.drawer-open .side-drawer {
  transform:translateX(0);
  visibility:visible;
  pointer-events:auto;
  transition:transform .22s ease;
}
.app-frame .drawer-inner { overflow-y:auto;overscroll-behavior:contain; }

/* Chapter progress is compact, readable and semantically colored in every mode. */
.chapter-card:not(.locked) .chapter-meta { align-items:center;flex-wrap:wrap;gap:6px; }
.chapter-card:not(.locked) .chapter-meta > span,
.chapter-card:not(.locked) .chapter-meta > strong {
  min-height:24px;
  padding:3px 7px;
  display:inline-flex;
  align-items:center;
  border:1px solid color-mix(in srgb,var(--line-strong) 74%,transparent);
  border-radius:999px;
  background:color-mix(in srgb,var(--surface-2) 84%,transparent);
  font-weight:850;
}
.chapter-card .chapter-meta .wrong-text {
  border-color:color-mix(in srgb,var(--wrong) 72%,var(--line));
  background:color-mix(in srgb,var(--wrong-soft) 70%,var(--surface));
  color:var(--wrong);
}
.chapter-card .chapter-meta .flag-text {
  border-color:color-mix(in srgb,var(--flag) 72%,var(--line));
  background:color-mix(in srgb,var(--flag-soft) 66%,var(--surface));
  color:var(--flag);
}
.chapter-card .chapter-meta .skip-text {
  border-color:color-mix(in srgb,#397cb8 68%,var(--line));
  background:color-mix(in srgb,#d9efff 74%,var(--surface));
  color:color-mix(in srgb,#235f99 84%,var(--text));
}

/* Skip uses a crossed-eye metaphor and a quiet, faded question-number treatment. */
.skip-tool { display:inline-flex;align-items:center;gap:6px; }
.skip-eye { width:18px;height:18px;display:inline-grid;place-items:center; }
.skip-eye svg { width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round; }
.number-chip.skipped,
.number-chip.skipped.current {
  position:relative;
  padding:13px 2px 2px;
  display:grid;
  place-items:center;
  border-color:color-mix(in srgb,#417dad 62%,var(--line));
  background:color-mix(in srgb,#d9efff 82%,var(--surface));
  color:color-mix(in srgb,#44749c 62%,var(--muted));
  opacity:.68;
  box-shadow:none;
}
.number-chip.skipped.current { outline-color:color-mix(in srgb,#5ba7df 74%,var(--line)); }
.number-chip.skipped > span { align-self:end;line-height:1; }
.number-chip .skip-mark {
  inset:0 0 auto;
  width:100%;
  height:17px;
  border:0;
  border-radius:8px 8px 0 0;
  background:transparent;
  color:color-mix(in srgb,#2f638f 72%,var(--muted));
  font:900 18px/16px Arial,sans-serif;
}

/* Eye-comfort answer feedback uses the same deep success/error tones in both themes. */
html[data-reading-comfort="on"] body:has(#app > .app-header) .option.correct,
html[data-reading-comfort="on"] body:has(#app > .app-header) .option.correct[aria-pressed="true"] {
  border-color:#17654a;
  background:#0a3f2c;
  color:#ffffff;
}
html[data-reading-comfort="on"] body:has(#app > .app-header) .option.incorrect,
html[data-reading-comfort="on"] body:has(#app > .app-header) .option.incorrect[aria-pressed="true"] {
  border-color:#8c2c38;
  background:#5b1520;
  color:#ffffff;
}
html[data-reading-comfort="on"] body:has(#app > .app-header) :is(.option.correct,.option.incorrect) .option-letter {
  border-color:rgba(255,255,255,.64);
  background:rgba(255,255,255,.14);
  color:#ffffff;
}

/* 2026-09-23 precision polish: visual-only refinements for library, chapters and reader. */
html[data-theme="light"] body:has(#app > .app-header) {
  --text:#111918;
  --muted:#45534f;
  --line:#c8d3d0;
  --line-strong:#aabbb6;
  --accent:#126c5b;
  --accent-strong:#0c594b;
  --accent-soft:#e2f2ed;
}
html[data-theme="light"][data-reading-comfort="off"] body:has(#app > .app-header) {
  --bg:#ffffff;
  --surface:#ffffff;
  --surface-2:#f7f9f8;
  --surface-3:#f1f5f3;
  --panel-sky:#ffffff;
  --reader-wash:#ffffff;
  --option-surface:#ffffff;
}
html[data-theme="light"][data-reading-comfort="on"] body:has(#app > .app-header) {
  --bg:#edf7fc;
  --surface:#f4fbfe;
  --surface-2:#e7f3f8;
  --surface-3:#e1eff5;
  --panel-sky:#e7f3f8;
  --reader-wash:#eaf5fa;
  --option-surface:#eef8fb;
}

/* The library switch lives in the fixed header and its two choices read as separate controls. */
.library-mobile-tabs { display:none !important; }
.header-center:has(.header-library-switch) { min-width:0;display:flex;justify-content:center; }
.header-library-switch {
  width:min(520px,100%);
  gap:8px;
  padding:0;
  border:0;
  background:transparent;
  box-shadow:none;
}
.header-library-switch button {
  min-height:39px;
  padding:0 14px;
  border:1px solid color-mix(in srgb,var(--line-strong) 74%,transparent);
  border-radius:12px;
  background:linear-gradient(180deg,color-mix(in srgb,var(--surface) 97%,#fff),color-mix(in srgb,var(--surface-2) 92%,var(--bg)));
  color:var(--text);
  box-shadow:0 4px 0 color-mix(in srgb,var(--line-strong) 70%,transparent),0 8px 17px rgba(12,44,38,.1),inset 0 1px 0 rgba(255,255,255,.7);
  font-size:11px;
  font-weight:900;
}
.header-library-switch button b { color:inherit;font-weight:950; }
.header-library-switch button.active {
  border-color:color-mix(in srgb,var(--accent) 62%,var(--line));
  background:linear-gradient(180deg,color-mix(in srgb,var(--accent-soft) 52%,var(--surface)),color-mix(in srgb,var(--accent-soft) 82%,var(--surface-2)));
  color:var(--accent-strong);
  box-shadow:0 4px 0 color-mix(in srgb,var(--accent) 46%,var(--line)),0 9px 18px rgba(12,74,62,.14),inset 0 1px 0 rgba(255,255,255,.72);
}
.header-library-switch button:active { transform:translateY(3px);box-shadow:0 1px 0 var(--line-strong); }
@media (max-width:900px) {
  .header-library-switch { display:grid; }
  .header-center:has(.header-library-switch) { display:flex; }
}
@media (max-width:680px) {
  .app-header:has(.header-library-switch) { gap:6px;padding-left:7px;padding-right:7px; }
  .app-header:has(.header-library-switch) .header-left { gap:3px; }
  .app-header:has(.header-library-switch) .header-left .icon-button { width:33px;height:33px;min-width:33px; }
  .app-header:has(.header-library-switch) .header-library-switch { gap:5px; }
  .app-header:has(.header-library-switch) .header-library-switch button { min-height:34px;padding:0 7px;font-size:9px; }
  .app-header:has(.header-library-switch) .library-home-button { width:36px;min-height:36px;padding:0;justify-content:center; }
  .app-header:has(.header-library-switch) .library-home-button b { display:none; }
  .app-header:has(.header-library-switch) .account-button,
  .app-header:has(.header-library-switch) .avatar-sticker { width:34px;height:34px; }
}
@media (max-width:480px) {
  .app-header:has(.header-library-switch) .back-button { display:none; }
  .app-header:has(.header-library-switch) .header-library-switch button { padding:0 5px;font-size:8px; }
}

/* Book shelves: soft elevation and spacing replace the former heavy outline. */
.library-shell { padding-top:18px; }
.library-panel {
  padding:18px;
  border:0;
  border-radius:22px;
  background:color-mix(in srgb,var(--surface-2) 52%,var(--bg));
  box-shadow:inset 0 1px 0 color-mix(in srgb,#fff 50%,transparent),0 14px 34px rgba(17,45,39,.07);
}
.library-panel > header h1,.tile-heading h2,.tile-meta strong { color:var(--text);font-weight:900; }
.library-books { gap:18px; }
.book-tile {
  border:1px solid color-mix(in srgb,var(--line) 46%,transparent);
  border-radius:18px;
  background:linear-gradient(145deg,color-mix(in srgb,var(--surface) 98%,#fff),color-mix(in srgb,var(--surface-2) 84%,var(--surface)));
  box-shadow:0 7px 0 color-mix(in srgb,var(--line) 66%,transparent),0 16px 30px rgba(19,48,42,.12),inset 0 1px 0 rgba(255,255,255,.72);
  overflow:visible;
}
.book-tile:hover {
  transform:translateY(-3px);
  border-color:color-mix(in srgb,var(--line-strong) 62%,transparent);
  box-shadow:0 9px 0 color-mix(in srgb,var(--line) 62%,transparent),0 20px 36px rgba(19,48,42,.15),inset 0 1px 0 rgba(255,255,255,.72);
}
.book-open { border-radius:inherit; }
.favorite-button { border-color:color-mix(in srgb,var(--line-strong) 62%,transparent);box-shadow:0 3px 0 color-mix(in srgb,var(--line) 72%,transparent),0 7px 13px rgba(17,45,39,.12); }
html[data-theme="dark"] body:has(#app > .app-header) :is(.library-panel > header h1,.tile-heading h2,.tile-meta strong,.book-open) { color:#f8fbfa; }
html[data-theme="dark"] body:has(#app > .app-header) .book-tile {
  background:linear-gradient(145deg,color-mix(in srgb,var(--surface) 94%,#fff 6%),color-mix(in srgb,var(--surface-2) 92%,#000));
  border-color:color-mix(in srgb,var(--line) 55%,transparent);
  box-shadow:0 7px 0 color-mix(in srgb,var(--line) 58%,#000),0 18px 34px rgba(0,0,0,.34),inset 0 1px 0 rgba(255,255,255,.08);
}

/* Chapter cards use one heading line, breathable separation and semantic progress chips. */
.book-panel {
  border:1px solid color-mix(in srgb,var(--line) 58%,transparent);
  background:linear-gradient(145deg,color-mix(in srgb,var(--surface) 96%,#fff),color-mix(in srgb,var(--surface-2) 76%,var(--surface)));
  box-shadow:0 10px 25px rgba(17,45,39,.09),inset 0 1px 0 rgba(255,255,255,.7);
}
.chapter-list { gap:14px; }
.chapter-card {
  min-height:104px;
  padding:15px 17px;
  border:1px solid color-mix(in srgb,var(--line-strong) 52%,transparent);
  border-radius:16px;
  background:linear-gradient(145deg,color-mix(in srgb,var(--surface-2) 72%,var(--surface)),color-mix(in srgb,var(--surface) 95%,var(--bg)));
  box-shadow:0 5px 0 color-mix(in srgb,var(--line) 62%,transparent),0 12px 24px rgba(17,45,39,.085),inset 0 1px 0 rgba(255,255,255,.62);
}
.chapter-card:hover { transform:translateY(-2px);border-color:color-mix(in srgb,var(--accent) 48%,var(--line));box-shadow:0 7px 0 color-mix(in srgb,var(--line) 58%,transparent),0 16px 28px rgba(17,45,39,.12); }
.chapter-heading { display:flex;align-items:baseline;gap:10px;min-width:0;margin-bottom:9px; }
.chapter-label { flex:none;color:var(--text);font-size:15px;font-weight:900;letter-spacing:0; }
.chapter-card h3 { min-width:0;margin:0;color:var(--text);font-size:17px;line-height:1.22;font-weight:900; }
.chapter-count { color:var(--text);font-size:20px;line-height:1;font-weight:950; }
.chapter-card:not(.locked) .chapter-meta > span,
.chapter-card:not(.locked) .chapter-meta > strong { border-color:transparent;box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--line) 72%,transparent); }
.chapter-card .progress-track { margin-top:10px; }
html[data-theme="dark"] body:has(#app > .app-header) :is(.chapter-label,.chapter-card h3,.chapter-count,.book-panel h1) { color:#f8fbfa; }
html[data-theme="dark"] body:has(#app > .app-header) .chapter-card {
  background:linear-gradient(145deg,color-mix(in srgb,var(--surface-2) 86%,#fff 4%),color-mix(in srgb,var(--surface) 90%,#000));
  border-color:color-mix(in srgb,var(--line) 58%,transparent);
  box-shadow:0 5px 0 color-mix(in srgb,var(--line) 58%,#000),0 14px 28px rgba(0,0,0,.3),inset 0 1px 0 rgba(255,255,255,.07);
}

/* A compact crossed-eye glyph replaces the fast-forward skip metaphor in summaries. */
.skip-stat,.skip-text,.book-panel-progress > span { align-items:center; }
.skip-stat,.skip-text { display:inline-flex !important;gap:4px; }
.skip-symbol { width:14px;height:10px;position:relative;display:inline-block;flex:none;border:1.8px solid currentColor;border-radius:50% / 58%;transform:translateY(1px); }
.skip-symbol::before { content:"";position:absolute;left:4px;top:2px;width:3px;height:3px;border-radius:50%;background:currentColor; }
.skip-symbol::after { content:"";position:absolute;left:-2px;top:4px;width:17px;height:1.8px;border-radius:2px;background:currentColor;transform:rotate(-35deg);box-shadow:0 0 0 1px var(--surface); }

/* Reader navigation and card separation: quiet depth, visible numbers and preserved status colors. */
.reader-context-head,.reader-number-nav {
  border-color:color-mix(in srgb,var(--line-strong) 68%,transparent);
  background:linear-gradient(180deg,color-mix(in srgb,var(--surface) 96%,#fff),color-mix(in srgb,var(--surface-2) 78%,var(--surface)));
}
.reader-number-nav { box-shadow:0 5px 0 color-mix(in srgb,var(--line) 58%,transparent),0 11px 22px rgba(17,45,39,.075); }
.number-chip {
  border:1px solid color-mix(in srgb,var(--line-strong) 72%,transparent);
  background:linear-gradient(145deg,color-mix(in srgb,var(--surface-2) 88%,#fff),color-mix(in srgb,var(--surface-3) 80%,var(--surface)));
  color:var(--text);
  box-shadow:0 3px 0 color-mix(in srgb,var(--line) 72%,transparent),0 6px 10px rgba(17,45,39,.08),inset 0 1px 0 rgba(255,255,255,.7);
  font-weight:900;
}
.number-chip.current { outline:2px solid color-mix(in srgb,var(--accent) 72%,transparent);outline-offset:2px;background:var(--accent-strong);border-color:var(--accent-strong);color:#fff;box-shadow:0 3px 0 color-mix(in srgb,var(--accent-strong) 74%,#000),0 7px 12px rgba(10,84,70,.2); }
.number-chip.correct { color:var(--correct); }
.number-chip.wrong { color:var(--wrong); }
.number-chip.skipped,.number-chip.skipped.current { opacity:1; }
.number-chip.skipped .skip-mark { color:#111918;text-shadow:0 1px 0 rgba(255,255,255,.6); }
html[data-theme="dark"] body:has(#app > .app-header) .number-chip.skipped .skip-mark { color:#ffffff;text-shadow:0 1px 2px #000; }
.reader-card {
  border:1px solid color-mix(in srgb,var(--line-strong) 70%,transparent);
  background:linear-gradient(145deg,color-mix(in srgb,var(--reader-wash) 96%,#fff),color-mix(in srgb,var(--surface) 88%,var(--surface-2)));
  box-shadow:0 7px 0 color-mix(in srgb,var(--line) 58%,transparent),0 18px 36px rgba(17,45,39,.1),inset 0 1px 0 rgba(255,255,255,.68);
}
.reader-toolbar {
  margin:-2px -4px 0;
  padding:8px 4px 13px;
  border-bottom:1px solid color-mix(in srgb,var(--line-strong) 70%,transparent);
  background:transparent;
}
.question-index { color:var(--text);font-weight:950; }
.reader-content :is(.question-stem,.vignette-section,.lead-in,.option-text,.answer-section p,.note-card textarea) { color:var(--text); }
html[data-theme="light"] body:has(#app > .app-header) .reader-content :is(.question-stem,.vignette-section,.lead-in,.option-text,.answer-section p) { color:#111918; }
html[data-theme="dark"] body:has(#app > .app-header) .reader-content :is(.question-stem,.vignette-section,.lead-in,.option-text,.answer-section p) { color:#f8fbfa; }

/* Tools have distinct, readable purposes while retaining their existing actions. */
.reader-toolbar :is(.tool-icon,.tool-word),.editor-trigger {
  border-color:color-mix(in srgb,var(--line-strong) 68%,transparent);
  background:linear-gradient(180deg,color-mix(in srgb,var(--surface) 96%,#fff),color-mix(in srgb,var(--surface-2) 88%,var(--surface)));
  color:var(--text);
  box-shadow:0 3px 0 color-mix(in srgb,var(--line) 72%,transparent),0 7px 12px rgba(17,45,39,.08);
  font-weight:900;
}
.reader-toolbar :is(.tool-icon,.tool-word):active,.editor-trigger:active { transform:translateY(2px);box-shadow:0 1px 0 var(--line); }
.reader-toolbar .flag { color:var(--flag);background:linear-gradient(180deg,color-mix(in srgb,var(--flag-soft) 50%,var(--surface)),color-mix(in srgb,var(--flag-soft) 72%,var(--surface-2))); }
.reader-toolbar .reset-tool { color:var(--wrong);background:linear-gradient(180deg,color-mix(in srgb,var(--wrong-soft) 44%,var(--surface)),color-mix(in srgb,var(--wrong-soft) 66%,var(--surface-2))); }
.reader-toolbar .skip-tool { color:color-mix(in srgb,var(--text) 82%,var(--muted)); }
.reader-toolbar .skip-tool.active { color:var(--wrong);background:linear-gradient(180deg,color-mix(in srgb,var(--wrong-soft) 38%,var(--surface)),color-mix(in srgb,var(--wrong-soft) 58%,var(--surface-2))); }
.reader-toolbar .comparison-tool { color:#245fc0; }
html[data-theme="dark"] body:has(#app > .app-header) .reader-toolbar .comparison-tool { color:#8ab6ff; }
html[data-theme="dark"] body:has(#app > .app-header) :is(.reader-card,.reader-context-head,.reader-number-nav) { box-shadow:0 6px 0 color-mix(in srgb,var(--line) 54%,#000),0 18px 34px rgba(0,0,0,.32),inset 0 1px 0 rgba(255,255,255,.07); }

/* Final palette: conventional high-contrast surfaces; no indigo text or washed-out panels. */
html[data-theme="light"][data-reading-comfort="off"] body:has(#app > .app-header) {
  --bg:#ffffff;
  --surface:#ffffff;
  --surface-2:#f7f9f8;
  --surface-3:#f1f5f3;
  --panel-sky:#ffffff;
  --reader-wash:#ffffff;
  --reader-wash-border:#aabbb6;
  --option-surface:#ffffff;
  --text:#111918;
  --muted:#45534f;
  --line:#c8d3d0;
  --line-strong:#aabbb6;
  --accent:#126c5b;
  --accent-strong:#0c594b;
  --accent-soft:#e2f2ed;
  --shadow:0 14px 34px rgba(17,45,39,.09);
}
html[data-theme="light"][data-reading-comfort="on"] body:has(#app > .app-header) {
  --bg:#e5ebe8;
  --surface:#fbfcfb;
  --surface-2:#edf2ef;
  --surface-3:#e0e8e4;
  --panel-sky:#f2f5f3;
  --reader-wash:#fafcfb;
  --reader-wash-border:#93aaa4;
  --option-surface:#ffffff;
  --text:#101716;
  --muted:#46534f;
  --line:#b8c8c4;
  --line-strong:#93aaa4;
}
html[data-theme="dark"][data-reading-comfort="off"] body:has(#app > .app-header) {
  --bg:#0d100f;
  --surface:#171b19;
  --surface-2:#202622;
  --surface-3:#29312d;
  --text:#f7faf9;
  --muted:#b0bbb6;
  --line:#38443f;
  --line-strong:#52615a;
  --accent:#77cfb7;
  --accent-strong:#57bea3;
  --accent-soft:#1b3b32;
  --shadow:0 18px 42px rgba(0,0,0,.34);
}
html[data-theme="light"] body:has(#app > .app-header) :is(
  .app-header,.header-crumbs,.header-crumbs button,.icon-button,.drawer-link,
  .library-panel,.library-panel h1,.book-open,.book-panel,.book-panel h1,
  .chapter-card,.chapter-card h3,.chapter-label,.chapter-count,
  .reader-topnav,.reader-card,.question-index,.reader-toolbar button
) { color:var(--text); }
html[data-theme="dark"] body:has(#app > .app-header) :is(
  .app-header,.header-crumbs,.header-crumbs button,.icon-button,.drawer-link,
  .library-panel,.library-panel h1,.book-open,.book-panel,.book-panel h1,
  .chapter-card,.chapter-card h3,.chapter-label,.chapter-count,
  .reader-topnav,.reader-card,.question-index
) { color:#f7faf9; }
html[data-theme="light"] body:has(#app > .app-header) :is(.book-tile,.chapter-card,.reader-card,.reader-topnav,.tool-icon,.tool-word,.option) {
  border-color:color-mix(in srgb,var(--line-strong) 62%,transparent);
}
.number-chip.skipped.current {
  background:linear-gradient(145deg,#dceef5,#c7e1ec);
  border-color:#77a8bc;
  color:#365d6d;
  outline-color:#4c91ad;
  box-shadow:0 3px 0 #8bb3c3,0 7px 12px rgba(45,91,109,.16);
}
html[data-theme="dark"] body:has(#app > .app-header) .number-chip.skipped.current {
  background:linear-gradient(145deg,#2c4149,#213139);
  border-color:#6d929f;
  color:#d7e7ec;
  outline-color:#83adbb;
  box-shadow:0 3px 0 #18252a,0 7px 12px rgba(0,0,0,.28);
}
.reader-content .option.correct {
  background:var(--correct) !important;
  border-color:var(--correct) !important;
  color:#ffffff !important;
}
.reader-content .option.incorrect {
  background:var(--wrong) !important;
  border-color:var(--wrong) !important;
  color:#ffffff !important;
}
.reader-content :is(.option.correct,.option.incorrect) :is(.option-text,.option-letter) { color:#ffffff !important; }

/* Final reader hierarchy and semantic color pass. Presentation only. */
.reader-shell {
  width:calc(100% - 24px);
  margin-inline:auto;
  padding-inline:0;
}
.book-panel-progress {
  width:100%;
  display:grid;
  grid-template-columns:minmax(0,1fr);
  align-items:stretch;
  gap:7px;
}
.book-panel-progress > span {
  width:100%;
  display:block;
  color:var(--text);
  font-weight:750;
  line-height:1.35;
  white-space:nowrap;
}
.book-panel-progress .progress-track { width:100%; }
.book-panel-progress .skip-symbol { margin-inline-end:5px; }

.chapter-strip-head { align-items:center; }
.chapter-strip-head > div {
  min-width:0;
  display:grid;
  grid-template-columns:minmax(0,1fr);
  align-items:start;
  gap:3px;
}
.chapter-strip-head > div > span {
  display:block;
  overflow:hidden;
  color:var(--muted);
  font-size:10px;
  line-height:1.25;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.reader-context-head .chapter-reset-button {
  border-color:#b95c66;
  background:linear-gradient(180deg,#f7d9dd,#efc2c8);
  color:#921c2a;
  box-shadow:0 3px 0 #d5a1a8,0 7px 13px rgba(146,28,42,.13);
}

html[data-theme="light"] body:has(#app > .app-header) .number-chip,
html[data-theme="dark"][data-reading-comfort="off"] body:has(#app > .app-header) .number-chip {
  opacity:1;
  font-weight:900;
}
html[data-theme="light"] body:has(#app > .app-header) .number-chip {
  border-color:#b7c5c1;
  background:#f8faf9 !important;
  color:#111918 !important;
}
html[data-theme="light"] body:has(#app > .app-header) .number-chip.correct {
  border-color:rgba(8,109,63,.48);
  background:rgba(8,109,63,.16) !important;
  color:#075b36 !important;
}
html[data-theme="light"] body:has(#app > .app-header) .number-chip.wrong {
  border-color:rgba(180,35,46,.48);
  background:rgba(180,35,46,.15) !important;
  color:#8e1723 !important;
}
html[data-theme="light"] body:has(#app > .app-header) .number-chip.flagged {
  border-color:#c49416;
  background:rgba(243,193,45,.32) !important;
  color:#781b26 !important;
  box-shadow:0 3px 0 rgba(196,148,22,.34),0 6px 10px rgba(80,58,8,.1);
}
html[data-theme="light"] body:has(#app > .app-header) .number-chip.current:not(.skipped) {
  border-color:#168069;
  background:#ffffff !important;
  color:#0b6c58 !important;
  outline:2px solid rgba(22,128,105,.72);
  outline-offset:2px;
  box-shadow:0 3px 0 rgba(22,128,105,.28),0 7px 12px rgba(11,108,88,.12);
}
html[data-theme="light"] body:has(#app > .app-header) .number-chip.skipped,
html[data-theme="light"] body:has(#app > .app-header) .number-chip.skipped.current {
  border-color:#73a7c5;
  background:rgba(131,190,224,.28) !important;
  color:#174f78 !important;
  outline-color:#5f9cbd;
  box-shadow:0 3px 0 rgba(95,156,189,.24),0 6px 10px rgba(23,79,120,.08);
}
html[data-theme="light"] body:has(#app > .app-header) .number-chip.skipped .skip-mark {
  color:#111111;
  text-shadow:0 1px 0 #ffffff;
}

html[data-theme="dark"][data-reading-comfort="off"] body:has(#app > .app-header) .number-chip {
  border-color:#53615b;
  background:#202622 !important;
  color:#f7faf9 !important;
}
html[data-theme="dark"][data-reading-comfort="off"] body:has(#app > .app-header) .number-chip.correct {
  border-color:#3d9c73;
  background:rgba(31,143,95,.32) !important;
  color:#8ee0b3 !important;
}
html[data-theme="dark"][data-reading-comfort="off"] body:has(#app > .app-header) .number-chip.wrong {
  border-color:#b94552;
  background:rgba(190,50,64,.34) !important;
  color:#ff9da7 !important;
}
html[data-theme="dark"][data-reading-comfort="off"] body:has(#app > .app-header) .number-chip.flagged {
  border-color:#c99c31;
  background:rgba(218,168,35,.30) !important;
  color:#ffd46b !important;
}
html[data-theme="dark"][data-reading-comfort="off"] body:has(#app > .app-header) .number-chip.current:not(.skipped) {
  border-color:#77cfb7;
  background:#171b19 !important;
  color:#a4edd8 !important;
  outline:2px solid rgba(119,207,183,.72);
  outline-offset:2px;
}
html[data-theme="dark"][data-reading-comfort="off"] body:has(#app > .app-header) .number-chip.skipped,
html[data-theme="dark"][data-reading-comfort="off"] body:has(#app > .app-header) .number-chip.skipped.current {
  border-color:#669ab7;
  background:rgba(70,135,171,.34) !important;
  color:#b9ddf0 !important;
}
html[data-theme="dark"][data-reading-comfort="off"] body:has(#app > .app-header) .number-chip.skipped .skip-mark { color:#ffffff; }

.reader-toolbar .comparison-tool {
  border-color:#79b9d5 !important;
  background:linear-gradient(180deg,#e7f7ff,#d4effb) !important;
  color:#185b78 !important;
}
.reader-toolbar [data-action="read-question"] {
  border-color:#8995cf !important;
  background:linear-gradient(180deg,#eef0ff,#dfe4ff) !important;
  color:#26366f !important;
}
.reader-toolbar .highlight-brush {
  border-color:#d78daf !important;
  background:linear-gradient(180deg,#ffeaf4,#f8d6e7) !important;
  color:#8a2958 !important;
}
.reader-toolbar .reset-tool {
  border-color:#bf6670 !important;
  background:linear-gradient(180deg,#f9dce0,#efc5ca) !important;
  color:#941d2a !important;
}
.reader-toolbar .skip-tool,
.reader-toolbar .skip-tool.active {
  border-color:#a8b0ad !important;
  background:linear-gradient(180deg,#f3f5f4,#e4e8e6) !important;
  color:#111918 !important;
}
html[data-theme="light"] body:has(#app > .app-header) .reader-toolbar .flag { border-color:#c39a2e !important;background:linear-gradient(180deg,#fff0ad,#f7dd7d) !important;color:#6e5100 !important; }
html[data-theme="dark"] body:has(#app > .app-header) .reader-toolbar .comparison-tool { background:linear-gradient(180deg,#183b4a,#122f3b) !important;color:#a8dcf2 !important; }
html[data-theme="dark"] body:has(#app > .app-header) .reader-toolbar [data-action="read-question"] { background:linear-gradient(180deg,#29325f,#20284e) !important;color:#dfe4ff !important; }
html[data-theme="dark"] body:has(#app > .app-header) .reader-toolbar .highlight-brush { background:linear-gradient(180deg,#51253a,#421d30) !important;color:#ffc2df !important; }
html[data-theme="dark"] body:has(#app > .app-header) .reader-toolbar .reset-tool { background:linear-gradient(180deg,#57232a,#461a21) !important;color:#ffb1ba !important; }
html[data-theme="dark"] body:has(#app > .app-header) .reader-toolbar .skip-tool,
html[data-theme="dark"] body:has(#app > .app-header) .reader-toolbar .skip-tool.active { background:linear-gradient(180deg,#303633,#252a28) !important;color:#f7faf9 !important; }

.reader-content .question-stem {
  margin-block:2px 16px;
  padding:13px 16px;
  border:0;
  border-inline-start:5px solid var(--accent);
  border-radius:0 12px 12px 0;
  background:color-mix(in srgb,var(--accent-soft) 58%,var(--surface));
  color:var(--text);
}
html[dir="rtl"] .reader-content .question-stem { border-radius:12px 0 0 12px; }

html[data-theme="light"] body:has(#app > .app-header) .reader-crumbs > :is(button,span) {
  border-color:#b5c0eb;
  background:#eef0ff;
  color:#111918;
}

.note-card {
  padding:15px;
  border:1px solid color-mix(in srgb,var(--line-strong) 68%,transparent);
  border-inline-start:5px solid var(--accent);
  border-radius:14px;
  background:color-mix(in srgb,var(--surface-2) 68%,var(--surface));
  box-shadow:0 5px 0 color-mix(in srgb,var(--line) 58%,transparent),0 11px 22px rgba(17,45,39,.07);
}
.note-card textarea {
  border-color:color-mix(in srgb,var(--line-strong) 72%,transparent);
  background:var(--surface);
}
.note-actions [data-action="save-note"],
.settings-dialog .dialog-actions .button.primary,
.iqm-settings-page .dialog-actions .button.primary {
  border-color:var(--accent-strong) !important;
  background:var(--accent-strong) !important;
  color:#ffffff !important;
  box-shadow:0 3px 0 color-mix(in srgb,var(--accent-strong) 72%,#000),0 7px 13px rgba(12,89,75,.18);
}

@media (max-width:640px) {
  .reader-shell { width:calc(100% - 16px); }
  .book-panel-progress > span { white-space:normal; }
  .chapter-strip-head > div > span { font-size:9px; }
  .reader-content .question-stem { padding:11px 12px; }
}

/* General reader cleanup shared by every theme and study mode. */
.number-chip.skipped,
.number-chip.skipped.current {
  inline-size:calc(100% - 4px) !important;
  block-size:calc(100% - 4px) !important;
  min-inline-size:0 !important;
  margin:auto;
  padding:9px 1px 1px;
  align-self:center;
  justify-self:center;
  border-color:color-mix(in srgb,#79a8bd 54%,var(--line)) !important;
  background:color-mix(in srgb,#d9eff7 48%,var(--surface)) !important;
  color:color-mix(in srgb,#37697f 70%,var(--muted)) !important;
  outline-width:1px;
  outline-offset:1px;
  box-shadow:none !important;
}
.number-chip.skipped .skip-mark {
  height:12px;
  color:color-mix(in srgb,var(--text) 74%,var(--muted));
  font:900 13px/12px Arial,sans-serif;
  text-shadow:none;
}
.number-chip.skipped > span { font-size:.9em; }

.reader-toolbar {
  margin:0;
  padding:8px 0 12px;
  border:0 !important;
  border-bottom:2px solid color-mix(in srgb,var(--line-strong) 86%,var(--text)) !important;
  border-radius:0;
  background:transparent;
  box-shadow:none;
}
.reader-toolbar + .reader-content { padding-top:10px; }

.note-card {
  margin-top:14px;
  padding:0 !important;
  border:0 !important;
  border-radius:0 !important;
  background:transparent !important;
  box-shadow:none !important;
}
.note-card textarea { width:100%; }
.note-card .note-actions { padding-inline:0; }

/* General toolbar states: quiet until selected, then use the established active color. */
.reader-toolbar .comparison-tool:not(.active) {
  border-color:color-mix(in srgb,var(--line-strong) 82%,transparent) !important;
  background:transparent !important;
  color:var(--text) !important;
  box-shadow:none !important;
}
.reader-toolbar :is(.flag,.review-tool.flag):not(.active) {
  background:transparent !important;
  box-shadow:none !important;
}
html[data-theme="light"] body:has(#app > .app-header) .reader-toolbar :is(.flag,.review-tool.flag):not(.active) {
  border-color:#b38413 !important;
  color:#806000 !important;
}
html[data-theme="dark"] body:has(#app > .app-header) .reader-toolbar :is(.flag,.review-tool.flag):not(.active) {
  border-color:#d5ad3d !important;
  color:#ffd75a !important;
}
.reader-toolbar :is(.flag,.review-tool.flag).active {
  border-color:color-mix(in srgb,var(--flag) 86%,var(--line)) !important;
  background:linear-gradient(180deg,color-mix(in srgb,var(--flag-soft) 72%,var(--surface)),color-mix(in srgb,var(--flag-soft) 90%,var(--surface-2))) !important;
  color:var(--flag) !important;
  box-shadow:0 3px 0 color-mix(in srgb,var(--flag) 46%,var(--line)),0 7px 12px color-mix(in srgb,var(--flag) 14%,transparent) !important;
}
.reader-toolbar .highlight-brush,
.explanation-highlight-wrap .highlight-brush {
  border-color:#c76f99 !important;
  background:#f4c6db !important;
  color:#111111 !important;
  box-shadow:0 3px 0 rgba(151,69,108,.28),0 7px 12px rgba(151,69,108,.12) !important;
  font-size:11px !important;
  font-weight:900;
}
.explanation-highlight-wrap .highlight-brush { font-size:10px !important; }

/* Unified, translucent grading feedback for every theme and study surface. */
html[data-theme="light"] body:has(#app > .app-header) {
  --graded-correct-bg:rgba(15,103,73,.17);
  --graded-correct-border:#26775b;
  --graded-correct-text:#174f3c;
  --graded-correct-letter-bg:rgba(15,103,73,.31);
  --graded-correct-letter-border:#1d684f;
  --graded-wrong-bg:rgba(111,29,44,.17);
  --graded-wrong-border:#843044;
  --graded-wrong-text:#641f2e;
  --graded-wrong-letter-bg:rgba(111,29,44,.31);
  --graded-wrong-letter-border:#742638;
}
html[data-theme="dark"] body:has(#app > .app-header) {
  --graded-correct-bg:rgba(35,126,91,.30);
  --graded-correct-border:#4f9c7f;
  --graded-correct-text:#e2f4ed;
  --graded-correct-letter-bg:rgba(31,116,84,.52);
  --graded-correct-letter-border:#62ae91;
  --graded-wrong-bg:rgba(119,37,52,.34);
  --graded-wrong-border:#b66472;
  --graded-wrong-text:#f7e6e9;
  --graded-wrong-letter-bg:rgba(124,35,52,.56);
  --graded-wrong-letter-border:#c17380;
}
:is(.reader-content .option.correct,.smart-option.correct,.comparison-option.correct,.iqm-search-options li.is-correct) {
  border-color:var(--graded-correct-border) !important;
  background:var(--graded-correct-bg) !important;
  color:var(--graded-correct-text) !important;
  box-shadow:none !important;
}
:is(.reader-content .option.incorrect,.smart-option.incorrect) {
  border-color:var(--graded-wrong-border) !important;
  background:var(--graded-wrong-bg) !important;
  color:var(--graded-wrong-text) !important;
  box-shadow:none !important;
}
:is(.reader-content .option.correct .option-letter,.smart-option.correct .smart-option-letter,.comparison-option.correct b,.iqm-search-options li.is-correct b) {
  border-color:var(--graded-correct-letter-border) !important;
  background:var(--graded-correct-letter-bg) !important;
  color:var(--graded-correct-text) !important;
}
:is(.reader-content .option.incorrect .option-letter,.smart-option.incorrect .smart-option-letter) {
  border-color:var(--graded-wrong-letter-border) !important;
  background:var(--graded-wrong-letter-bg) !important;
  color:var(--graded-wrong-text) !important;
}
:is(.reader-content .option.correct .option-text,.smart-option.correct .smart-option-text,.comparison-option.correct span,.iqm-search-options li.is-correct span) {
  color:var(--graded-correct-text) !important;
}
:is(.reader-content .option.incorrect .option-text,.smart-option.incorrect .smart-option-text) {
  color:var(--graded-wrong-text) !important;
}

/* Keep inactive actions genuinely unfilled even against older theme-specific gradients. */
html[data-theme] body:has(#app > .app-header) .reader-toolbar .comparison-tool:not(.active) {
  background:transparent !important;
  background-image:none !important;
  color:var(--text) !important;
  box-shadow:none !important;
}
html[data-theme] body:has(#app > .app-header) .reader-toolbar :is(.flag,.review-tool.flag):not(.active) {
  background:transparent !important;
  background-image:none !important;
  box-shadow:none !important;
}

/* Highlight is deliberately identical in every theme and comfort setting. */
html[data-theme] body:has(#app > .app-header) .reader-toolbar .highlight-brush,
html[data-theme] body:has(#app > .app-header) .explanation-highlight-wrap .highlight-brush {
  border-color:#c76f99 !important;
  background:#f4c6db !important;
  background-image:none !important;
  color:#111111 !important;
  box-shadow:0 3px 0 rgba(151,69,108,.28),0 7px 12px rgba(151,69,108,.12) !important;
}

/* Light mode without eye comfort: distinct study collections in the drawer. */
html[data-theme="light"][data-reading-comfort="off"] body:has(#app > .app-header) .drawer-link.flagged {
  color:#765600;
}
html[data-theme="light"][data-reading-comfort="off"] body:has(#app > .app-header) .drawer-link.comparison {
  color:#155b88;
}
html[data-theme="light"][data-reading-comfort="off"] body:has(#app > .app-header) .drawer-link.wrong {
  color:#842536;
}
html[data-theme="light"][data-reading-comfort="off"] body:has(#app > .app-header) :is(.drawer-link.flagged,.drawer-link.comparison,.drawer-link.wrong) .drawer-icon {
  color:inherit;
}
html[data-theme="light"][data-reading-comfort="off"] body:has(#app > .app-header) .drawer-link.flagged:is(:hover,.active) {
  background:rgba(182,137,19,.12);
  color:#765600;
}
html[data-theme="light"][data-reading-comfort="off"] body:has(#app > .app-header) .drawer-link.comparison:is(:hover,.active) {
  background:rgba(30,105,151,.10);
  color:#155b88;
}
html[data-theme="light"][data-reading-comfort="off"] body:has(#app > .app-header) .drawer-link.wrong:is(:hover,.active) {
  background:rgba(132,37,54,.09);
  color:#842536;
}

/* 2026-09-24 final reader corrections requested across the study surfaces. */

/* In both light variants, every readable question part follows Settings exactly. */
html[data-theme="light"] body:has(#app > .app-header) .reader-content :is(
  .question-stem,
  .vignette-section,
  .lead-in,
  .answer-section p
) {
  font-size:var(--reader-size) !important;
}

/* Keep the glyph optically centred inside its own square after grading. */
:is(
  .reader-content .option-letter,
  .smart-option-letter,
  .comparison-option > b,
  .iqm-search-options li > b
) {
  align-self:center;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:0;
  line-height:1;
  vertical-align:middle;
}

/* A skipped chip is a smaller crossed-eye tile with its number kept in the corner. */
.number-chip.skipped,
.number-chip.skipped.current {
  position:relative;
  inline-size:27px !important;
  block-size:27px !important;
  width:27px !important;
  height:27px !important;
  min-inline-size:0 !important;
  margin:auto;
  padding:0 !important;
  display:grid;
  place-items:center;
  opacity:.78;
  overflow:hidden;
  transform:none;
}
.number-chip.skipped .skip-mark {
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  display:grid;
  place-items:center;
  border:0;
  border-radius:inherit;
  background:transparent;
  color:currentColor;
  text-shadow:none;
}
.number-chip.skipped .skip-mark svg {
  width:72%;
  height:72%;
  fill:none;
  stroke:currentColor;
  stroke-width:2;
  stroke-linecap:round;
  stroke-linejoin:round;
}
.number-chip.skipped > .skip-chip-number {
  position:absolute;
  inset-inline-end:2px;
  inset-block-end:1px;
  z-index:1;
  font:900 7px/1 Arial,sans-serif;
  color:currentColor;
}

/* Dark mode, with or without eye comfort: light status fills and dark readable labels. */
html[data-theme="dark"][data-reading-comfort] body:has(#app > .app-header) .number-chip:not(.correct):not(.wrong):not(.flagged):not(.comparison):not(.skipped) {
  background:transparent !important;
  background-image:none !important;
  color:#ffffff !important;
  border-color:#53645d;
  box-shadow:none;
}
html[data-theme="dark"][data-reading-comfort] body:has(#app > .app-header) .number-chip.comparison:not(.flagged) {
  border-color:#79bddc !important;
  background:#bfe9f8 !important;
  background-image:none !important;
  color:#263f78 !important;
  box-shadow:0 3px 0 rgba(52,113,143,.30);
}
html[data-theme="dark"][data-reading-comfort] body:has(#app > .app-header) .number-chip.correct:not(.flagged) {
  border-color:#79bd9b !important;
  background:#bfe5cf !important;
  background-image:none !important;
  color:#07583b !important;
  box-shadow:0 3px 0 rgba(38,112,77,.28);
}
html[data-theme="dark"][data-reading-comfort] body:has(#app > .app-header) .number-chip.flagged {
  border-color:#d5ac35 !important;
  background:#f9dfa0 !important;
  background-image:none !important;
  color:#725000 !important;
  box-shadow:0 3px 0 rgba(149,108,13,.30);
}

/* Study timers inherit the active theme. */
.study-session-timer {
  flex:none;display:inline-flex;align-items:center;gap:6px;padding:3px 8px 3px 3px;
  border:1px solid var(--line);border-radius:10px;background:var(--surface-2);color:var(--text);
  direction:ltr;white-space:nowrap;
}
.study-session-timer time { min-width:8ch;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:13px;font-weight:500;font-variant-numeric:tabular-nums;line-height:1.4; }
.study-timer-toggle {
  flex:none;display:inline-grid;place-items:center;width:32px;height:32px;padding:0;
  border:1px solid var(--line);border-radius:7px;background:var(--surface);color:var(--accent);touch-action:manipulation;
}
.study-timer-toggle:hover { border-color:var(--accent); }
.study-timer-toggle:focus-visible { outline:2px solid var(--accent);outline-offset:2px; }
.study-timer-toggle[aria-pressed="true"] { background:var(--accent-soft); }
.chapter-strip-head > .chapter-study-controls { flex:none;display:flex;align-items:center;gap:14px; }
.chapter-strip-head:has(.chapter-study-controls) > div:first-child { flex:1; }
.chapter-strip-head:has(.chapter-study-controls) strong { max-width:100%; }
.practice-strip-actions:has(.study-session-timer) { align-items:center;flex-wrap:wrap;gap:10px; }
.study-title-row { display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px 16px;margin-bottom:8px; }
.study-title-row > h1 { margin-bottom:0; }
@media (max-width:640px) {
  .chapter-strip-head:has(.chapter-study-controls) { flex-wrap:wrap;gap:8px; }
  .chapter-strip-head:has(.chapter-study-controls) > div:first-child { flex-basis:100%; }
  .chapter-strip-head > .chapter-study-controls { width:100%;justify-content:flex-end;gap:14px; }
}

/* Unified fixed navigation rail and requested reader refinements. */
:root { --drawer-rail-width:46px; }
.app-frame { grid-template-columns:var(--drawer-rail-width) minmax(0,1fr) !important;transition:grid-template-columns .24s ease !important; }
.app-frame.drawer-open { grid-template-columns:var(--drawer-width) minmax(0,1fr) !important; }
.side-drawer { width:100%;min-width:0;overflow:hidden;border-right:1px solid var(--line);transition:width .24s ease,border-color .24s ease; }
.drawer-inner { width:100%;padding:10px 7px;gap:5px;overflow-x:hidden;overflow-y:auto; }
.drawer-link { min-height:42px;padding:0 9px;gap:10px;white-space:nowrap;overflow:hidden; }
.drawer-icon { width:26px;height:26px;min-width:26px;display:grid;place-items:center; }
.drawer-icon svg { width:21px;height:21px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round; }
.app-frame:not(.drawer-open) .drawer-inner { padding-inline:3px; }
.app-frame:not(.drawer-open) .drawer-link { padding-inline:6px; }
.drawer-label,.drawer-premium,.drawer-version { opacity:0;max-width:0;overflow:hidden;transition:opacity .16s ease,max-width .24s ease; }
.drawer-open .drawer-label,.drawer-open .drawer-premium,.drawer-open .drawer-version { opacity:1;max-width:190px; }
.drawer-link.comparison .drawer-icon { color:#1f6e9e; }
.drawer-link.wrong .drawer-icon { color:var(--wrong); }
.drawer-link.flagged .drawer-icon { color:var(--flag); }
.drawer-link.previous-years .drawer-icon { color:var(--previous-year,#7646a3); }
.drawer-spacer { min-height:10px; }
.voice-field-row { display:block !important; }
.voice-field-row > select { width:100% !important;max-width:none !important; }
.chapter-reset-button { background:color-mix(in srgb,var(--wrong-soft) 82%,var(--surface)) !important;border-color:color-mix(in srgb,var(--wrong) 58%,var(--line)) !important;color:var(--wrong) !important;box-shadow:inset 0 0 0 999px color-mix(in srgb,var(--wrong-soft) 34%,transparent) !important; }
.iqm-search-page { overflow:hidden !important;height:100dvh;max-height:100dvh;min-height:0; }
.iqm-search-appbar { flex-shrink:0; }
.iqm-search-frame { flex:1 1 0;min-height:0;display:grid;grid-template-columns:var(--drawer-rail-width) minmax(0,1fr);transition:grid-template-columns .24s ease;overflow:hidden; }
.iqm-search-frame.drawer-open { grid-template-columns:var(--drawer-width) minmax(0,1fr); }
.iqm-search-frame .side-drawer { top:0;height:100%; }
.iqm-search-main { width:100% !important;max-width:none !important;height:100%;min-height:0;box-sizing:border-box;padding-bottom:calc(32px + env(safe-area-inset-bottom,0px));overflow-y:auto !important;overflow-x:hidden !important;overscroll-behavior:contain;scrollbar-gutter:stable; }
.iqm-search-main > * { width:min(100% - 32px,1010px);margin-inline:auto; }
.iqm-search-card-actions .previous-year-search.active { background:var(--previous-year-fill,#eedffa);border-color:var(--previous-year-border,#ab82c8);color:var(--previous-year-ink,#59317b); }
html.iqm-overlay-open,html.iqm-overlay-open body { overflow:hidden !important; }
@media (max-width:640px) {
  :root { --drawer-rail-width:52px;--drawer-width:min(82vw,270px); }
  .drawer-inner { padding-inline:5px; }
  .drawer-link { padding-inline:8px; }
  .iqm-search-main > * { width:min(100% - 18px,1010px); }
}

/* Final persistent navigation rail: the compact icon column stays visible in every
   application view; the hamburger only expands the label column. */
.app-frame .side-drawer {
  position:sticky;
  left:auto;
  top:var(--header-height);
  z-index:70;
  width:100%;
  height:calc(100dvh - var(--header-height));
  transform:none;
  visibility:visible;
  pointer-events:auto;
  transition:width .24s ease,border-color .24s ease;
}
.app-frame.drawer-open .side-drawer {
  transform:none;
  visibility:visible;
  pointer-events:auto;
}
.iqm-search-frame .side-drawer {
  top:0;
  height:100%;
  min-height:0;
  max-height:100%;
}

/* Search uses the available space below its actual header, including iPad safe areas. */
#iqmSearchPage .drawer-inner { height:100%;min-height:0;box-sizing:border-box;padding-bottom:calc(12px + env(safe-area-inset-bottom,0px));overflow-y:auto; }
#iqmSearchPage .drawer-inner > * { flex-shrink:0; }
#iqmSearchPage .drawer-spacer { flex:1 0 16px; }

/* Question and answer text share the live reading preferences in every theme. */
#iqmSearchPage :is(.iqm-search-question,.iqm-search-options,.iqm-search-options li,.iqm-search-options li > b,.iqm-search-options li > span) {
  font-family:var(--reader-family) !important;
  font-size:var(--reader-size) !important;
  font-weight:var(--reader-weight) !important;
  overflow-wrap:anywhere;
}

/* Compact, content-width mobile-only overlay drawer. Preserve the tablet/desktop rail. */
.mobile-drawer-backdrop { display:none; }
@media (max-width:640px), (max-width:900px) and (max-height:500px) and (pointer:coarse) {
  .app-frame,.app-frame.drawer-open {
    display:block !important;
    grid-template-columns:minmax(0,1fr) !important;
    width:100%;
    min-width:0;
    overflow-x:clip !important;
  }
  .app-frame > .content { grid-column:auto !important;width:100%;min-width:0; }
  .app-frame .side-drawer {
    position:fixed !important;
    left:0 !important;
    top:var(--header-height) !important;
    z-index:72;
    width:max-content !important;
    max-width:calc(100dvw - 20px);
    height:calc(100dvh - var(--header-height)) !important;
    transform:translate3d(-105%,0,0) !important;
    visibility:hidden !important;
    pointer-events:none !important;
    transition:transform .22s ease, visibility 0s linear .22s !important;
    box-shadow:12px 16px 30px rgba(0,0,0,.14);
  }
  .app-frame.drawer-open .side-drawer {
    transform:translate3d(0,0,0) !important;
    visibility:visible !important;
    pointer-events:auto !important;
    transition:transform .22s ease !important;
  }
  .app-frame .drawer-inner,
  .iqm-search-frame .drawer-inner {
    width:max-content !important;
    max-width:100%;
    min-width:0;
    box-sizing:border-box;
    padding:10px 9px;
  }
  .app-frame .drawer-link,
  .iqm-search-frame .drawer-link {
    width:100%;
    min-width:0;
    box-sizing:border-box;
    padding-inline:10px;
    gap:10px;
  }
  .app-frame.drawer-open .drawer-label,
  .iqm-search-frame.drawer-open .drawer-label {
    max-width:none;
    white-space:nowrap;
  }
  .app-frame > .mobile-drawer-backdrop,
  .iqm-search-frame > .mobile-drawer-backdrop {
    display:block;
    position:fixed;
    inset:var(--header-height) 0 0;
    z-index:71;
    width:100%;
    height:auto;
    padding:0;
    border:0;
    background:rgba(0,0,0,.22);
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transition:opacity .2s ease,visibility 0s linear .2s;
  }
  .app-frame.drawer-open > .mobile-drawer-backdrop,
  .iqm-search-frame.drawer-open > .mobile-drawer-backdrop {
    opacity:1;
    visibility:visible;
    pointer-events:auto;
    transition:opacity .2s ease;
  }
  /* Do not change the root scroll container when the menu opens: doing so
     can unstick/hide the header on mobile Safari and Chromium. The backdrop
     absorbs background gestures; the drawer keeps its own scrolling. */
  html.iqm-mobile-nav-open,
  html.iqm-mobile-nav-open body { overflow:visible !important; }
  html.iqm-mobile-nav-open body:has(#app > .app-header) .app-header {
    position:sticky !important;
    top:0 !important;
    z-index:180 !important;
  }
  .app-frame > .mobile-drawer-backdrop {
    touch-action:none;
    overscroll-behavior:contain;
  }
  .app-frame .side-drawer .drawer-inner {
    overscroll-behavior:contain;
  }

  /* Search is a separate overlay with its own menu and scrollable content. */
  .iqm-search-frame,.iqm-search-frame.drawer-open {
    position:relative;
    display:block !important;
    grid-template-columns:minmax(0,1fr) !important;
    width:100%;
    min-width:0;
    overflow:hidden !important;
  }
  .iqm-search-frame .iqm-search-main { width:100% !important;min-width:0; }
  .iqm-search-frame .side-drawer {
    position:absolute !important;
    top:0 !important;
    left:0 !important;
    z-index:72;
    width:max-content !important;
    max-width:calc(100dvw - 20px);
    height:100% !important;
    transform:translate3d(-105%,0,0) !important;
    visibility:hidden !important;
    pointer-events:none !important;
    transition:transform .22s ease, visibility 0s linear .22s !important;
    box-shadow:12px 16px 30px rgba(0,0,0,.14);
  }
  .iqm-search-frame.drawer-open .side-drawer {
    transform:translate3d(0,0,0) !important;
    visibility:visible !important;
    pointer-events:auto !important;
    transition:transform .22s ease !important;
  }
  .iqm-search-frame > .mobile-drawer-backdrop {
    position:absolute;
    inset:0;
  }
}

/* Random Exam: independent, combinable pool cards; books remain a separate AND scope. */
.exam-form { padding:clamp(14px,2.5vw,26px); }
.exam-method-box { min-width:0;margin:0 0 18px;padding:14px;border:1px solid var(--line);border-radius:14px; }
.exam-method-box legend { padding:0 7px;font-size:14px;font-weight:900; }
.exam-method-hint { margin:0 0 12px;color:var(--muted);font-size:12px;font-weight:550;line-height:1.5; }
.exam-method-grid { display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,230px),1fr));gap:10px; }
.exam-method-choice { display:flex;gap:11px;align-items:flex-start;min-width:0;min-height:74px;padding:13px 12px;border:1px solid var(--line-strong);border-radius:12px;background:var(--surface-2);cursor:pointer;transition:border-color .15s,background .15s; }
.exam-method-choice:has(input:checked) { background:var(--accent-soft);border-color:var(--accent); }
.exam-method-choice:focus-within { outline:2px solid var(--accent);outline-offset:2px; }
.exam-method-choice input { flex:none;width:19px;height:19px;margin:2px 0 0;accent-color:var(--accent-strong);cursor:pointer; }
.exam-method-copy { min-width:0;display:grid;gap:4px; }
.exam-method-copy strong { font-size:13px;line-height:1.35; }
.exam-method-copy small { font-size:11px;color:var(--muted);line-height:1.35;font-weight:500; }
.exam-start-row { margin:16px 0 0; }
.exam-start-row .button { min-height:47px; }
.exam-books-box { margin-top:18px; }
@media (max-width:640px) {
  .exam-method-grid { grid-template-columns:1fr;gap:8px; }
  .exam-method-choice { min-height:64px; }
  .exam-start-row .button { width:100%; }
}



/* Search shares the normal app shell, navigation and Settings. */
#app.iqm-search-screen { height:100dvh;display:flex;flex-direction:column;overflow:hidden; }
#app.iqm-search-screen > .app-header { flex-shrink:0; }
#app.iqm-search-screen > .app-frame { flex:1;min-height:0;overflow:hidden; }
#app.iqm-search-screen .content { height:100%;min-height:0;overflow:hidden; }
#app.iqm-search-screen .iqm-search-page { position:relative;inset:auto;z-index:auto;height:100%;max-height:100%;min-height:0; }
.iqm-search-fields { grid-template-columns:minmax(0,1fr) minmax(0,1fr) auto;align-items:stretch;direction:ltr; }
.iqm-search-submit { padding:0 18px;background:var(--accent-strong);color:#fff;font-weight:700; }
.iqm-search-status { font-size:14px;font-weight:600; }
#iqmSearchPage .iqm-search-explanation-label { font:italic 600 15px/1.4 Arial,sans-serif !important;color:#b05c9e !important; }
@media (max-width:640px) {
  .iqm-search-fields { grid-template-columns:minmax(0,1fr) auto;gap:8px; }
  .iqm-search-input-wrap { grid-column:1;grid-row:1;min-width:0; }
  .iqm-search-input-wrap:nth-child(2) { grid-row:2; }
  .iqm-search-submit { grid-column:2;grid-row:1 / 3;padding:0 12px; }
}

/* New Search appears only on the Search route; one unobtrusive clear button per field. */
.app-header .header-left .new-search-button {
  display: inline-flex !important;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: auto !important;
  min-width: max-content !important;
  padding: 0 10px;
  white-space: nowrap;
  font-size: 13px;
  font-weight: 650;
}
.iqm-search-input-wrap { grid-template-columns: auto minmax(0,1fr) auto; }
#iqmSearchPage .iqm-search-input-wrap input::-webkit-search-cancel-button { display: none; }
#iqmSearchPage .iqm-search-clear {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  min-width: 30px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 21px;
  line-height: 1;
  touch-action: manipulation;
}
#iqmSearchPage .iqm-search-clear[hidden] { display: none !important; }
#iqmSearchPage .iqm-search-clear:hover,
#iqmSearchPage .iqm-search-clear:focus-visible { background: var(--accent-soft); color: var(--accent-strong); }