:root {
  color-scheme: light;
  --bg: oklch(0.955 0.012 86);
  --surface: oklch(0.982 0.008 86);
  --surface-2: oklch(0.925 0.014 82);
  --ink: oklch(0.235 0.024 192);
  --ink-soft: oklch(0.42 0.022 190);
  --muted: oklch(0.56 0.018 190);
  --line: oklch(0.84 0.015 86);
  --line-strong: oklch(0.73 0.02 86);
  --accent: oklch(0.67 0.19 40);
  --accent-dark: oklch(0.47 0.16 38);
  --accent-soft: oklch(0.91 0.045 44);
  --lime: oklch(0.86 0.105 119);
  --lime-dark: oklch(0.45 0.095 124);
  --good: oklch(0.56 0.13 153);
  --good-soft: oklch(0.92 0.045 154);
  --bad: oklch(0.57 0.18 25);
  --bad-soft: oklch(0.93 0.042 25);
  --warning: oklch(0.72 0.15 78);
  --hero-bg: oklch(0.235 0.024 192);
  --hero-ink: oklch(0.97 0.01 86);
  --hero-muted: oklch(0.82 0.015 86);
  --hero-line: oklch(0.5 0.02 190);
  --on-accent: oklch(0.22 0.03 35);
  --shadow-sm: 0 1px 2px oklch(0.18 0.02 190 / 0.07), 0 6px 20px oklch(0.18 0.02 190 / 0.04);
  --shadow-lg: 0 24px 70px oklch(0.18 0.02 190 / 0.12);
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 24px;
  --sidebar: 228px;
  --max: 1120px;
  font-family: "Avenir Next", Avenir, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: oklch(0.19 0.018 194);
  --surface: oklch(0.235 0.018 194);
  --surface-2: oklch(0.28 0.019 194);
  --ink: oklch(0.93 0.012 86);
  --ink-soft: oklch(0.78 0.012 86);
  --muted: oklch(0.68 0.014 190);
  --line: oklch(0.34 0.018 194);
  --line-strong: oklch(0.43 0.02 194);
  --accent: oklch(0.72 0.17 43);
  --accent-dark: oklch(0.86 0.1 47);
  --accent-soft: oklch(0.31 0.06 36);
  --lime: oklch(0.76 0.11 122);
  --lime-dark: oklch(0.85 0.09 124);
  --good: oklch(0.72 0.12 153);
  --good-soft: oklch(0.29 0.055 153);
  --bad: oklch(0.72 0.16 25);
  --bad-soft: oklch(0.3 0.07 25);
  --shadow-sm: 0 1px 2px oklch(0.05 0.02 190 / 0.24), 0 8px 22px oklch(0.05 0.02 190 / 0.18);
  --shadow-lg: 0 28px 80px oklch(0.05 0.02 190 / 0.35);
}

@media (prefers-color-scheme: dark) {
  [data-theme="auto"] {
    color-scheme: dark;
    --bg: oklch(0.19 0.018 194);
    --surface: oklch(0.235 0.018 194);
    --surface-2: oklch(0.28 0.019 194);
    --ink: oklch(0.93 0.012 86);
    --ink-soft: oklch(0.78 0.012 86);
    --muted: oklch(0.68 0.014 190);
    --line: oklch(0.34 0.018 194);
    --line-strong: oklch(0.43 0.02 194);
    --accent: oklch(0.72 0.17 43);
    --accent-dark: oklch(0.86 0.1 47);
    --accent-soft: oklch(0.31 0.06 36);
    --lime: oklch(0.76 0.11 122);
    --lime-dark: oklch(0.85 0.09 124);
    --good: oklch(0.72 0.12 153);
    --good-soft: oklch(0.29 0.055 153);
    --bad: oklch(0.72 0.16 25);
    --bad-soft: oklch(0.3 0.07 25);
    --shadow-sm: 0 1px 2px oklch(0.05 0.02 190 / 0.24), 0 8px 22px oklch(0.05 0.02 190 / 0.18);
    --shadow-lg: 0 28px 80px oklch(0.05 0.02 190 / 0.35);
  }
}

* { box-sizing: border-box; }
html { min-height: 100%; background: var(--bg); scroll-behavior: smooth; }
body { min-width: 320px; min-height: 100vh; margin: 0; background: var(--bg); color: var(--ink); font-size: 15px; line-height: 1.5; -webkit-font-smoothing: antialiased; }
button, input, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { color: inherit; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 12px; font-size: 2rem; line-height: 1.08; letter-spacing: -0.045em; }
h2 { margin-bottom: 6px; font-size: 1.25rem; line-height: 1.2; letter-spacing: -0.025em; }
h3 { font-size: 1rem; }
small { line-height: 1.35; }
svg { flex: 0 0 auto; }

.skip-link { position: fixed; z-index: 1000; left: 12px; top: 12px; transform: translateY(-160%); padding: 10px 14px; border-radius: 8px; background: var(--ink); color: var(--bg); }
.skip-link:focus { transform: translateY(0); }
:focus-visible { outline: 3px solid color-mix(in oklch, var(--accent) 72%, transparent); outline-offset: 3px; }
::selection { background: var(--lime); color: oklch(0.2 0.02 190); }

.app-shell { min-height: 100vh; }
.sidebar { display: none; }
.page-frame { min-width: 0; }
.page { width: min(100%, var(--max)); min-height: calc(100vh - 64px); margin: 0 auto; padding: 30px 18px calc(104px + env(safe-area-inset-bottom)); }
.mobile-top { position: sticky; z-index: 40; top: 0; display: flex; min-height: 64px; align-items: center; justify-content: space-between; padding: max(10px, env(safe-area-inset-top)) 18px 10px; border-bottom: 1px solid color-mix(in oklch, var(--line) 76%, transparent); background: color-mix(in oklch, var(--bg) 92%, transparent); backdrop-filter: blur(14px); }
.wordmark { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; line-height: 1.08; }
.wordmark small { color: var(--muted); font-size: 11px; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; }
.mark { display: grid; width: 34px; height: 34px; place-items: center; border-radius: 10px; background: var(--ink); color: var(--bg); font-size: 12px; font-weight: 800; letter-spacing: 0.04em; }

.bottom-nav { position: fixed; z-index: 50; right: 0; bottom: 0; left: 0; display: grid; grid-template-columns: repeat(4, 1fr); padding: 7px 10px max(8px, env(safe-area-inset-bottom)); border-top: 1px solid var(--line); background: color-mix(in oklch, var(--surface) 94%, transparent); backdrop-filter: blur(18px); }
.nav-item { display: flex; min-height: 52px; align-items: center; justify-content: center; gap: 4px; border-radius: 12px; color: var(--muted); font-size: 11px; font-weight: 650; }
.bottom-nav .nav-item { flex-direction: column; }
.nav-item.active { background: var(--surface-2); color: var(--ink); }
.nav-item.active .icon { color: var(--accent); }

.page-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; margin: 0 0 30px; }
.page-heading > div:first-child { max-width: 720px; }
.page-heading .subhead { max-width: 62ch; margin-bottom: 0; color: var(--muted); font-size: 0.98rem; }
.eyebrow, .section-kicker { margin-bottom: 7px; color: var(--muted); font-size: 0.7rem; font-weight: 800; letter-spacing: 0.12em; text-transform: uppercase; }
.home-heading h1 { max-width: 560px; }
.streak-badge { display: flex; flex: 0 0 auto; align-items: center; gap: 6px; padding: 8px 10px; border: 1px solid var(--line); border-radius: 999px; color: var(--accent-dark); background: var(--surface); }
.streak-badge strong { font-size: 0.95rem; }
.streak-badge span { display: none; color: var(--muted); font-size: 0.72rem; }

.button { display: inline-flex; min-height: 44px; align-items: center; justify-content: center; gap: 8px; border: 1px solid var(--line); border-radius: 12px; padding: 10px 15px; background: var(--surface); color: var(--ink); font-weight: 700; cursor: pointer; transition: transform 180ms cubic-bezier(.22,1,.36,1), border-color 180ms ease, background 180ms ease; }
.button:active:not(:disabled) { transform: scale(0.98); }
.button:disabled, button:disabled { cursor: not-allowed; opacity: 0.48; }
.button.primary { border-color: var(--accent); background: var(--accent); color: var(--on-accent); box-shadow: 0 8px 20px color-mix(in oklch, var(--accent) 22%, transparent); }
.button.dark { border-color: var(--ink); background: var(--ink); color: var(--bg); }
.button.quiet { background: transparent; }
.button.danger { border-color: color-mix(in oklch, var(--bad) 46%, var(--line)); color: var(--bad); background: transparent; }
.button.large { min-height: 50px; padding-inline: 20px; }
.button.compact { min-height: 36px; padding: 6px 11px; border-radius: 9px; font-size: 0.78rem; }
.icon-button { display: inline-grid; width: 42px; height: 42px; place-items: center; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); cursor: pointer; }
.icon-button.selected { border-color: var(--accent); color: var(--accent-dark); background: var(--accent-soft); }
.text-button { border: 0; padding: 3px; background: transparent; color: var(--accent-dark); font-size: 0.78rem; font-weight: 750; cursor: pointer; }

.today-panel { display: grid; gap: 26px; align-items: center; margin-bottom: 22px; padding: 26px 22px; border-radius: var(--radius-lg); background: var(--hero-bg); color: var(--hero-ink); box-shadow: var(--shadow-lg); overflow: hidden; }
.today-copy { max-width: 620px; }
.today-copy .section-kicker { color: var(--hero-muted); }
.today-copy h2 { margin-bottom: 8px; font-size: 1.55rem; color: oklch(0.97 0.01 86); }
.today-copy p { margin-bottom: 20px; color: var(--hero-muted); }
.today-actions { display: flex; flex-wrap: wrap; gap: 9px; }
.today-panel .button.quiet { border-color: var(--hero-line); color: var(--hero-ink); }
.goal-dial { --progress: 0deg; position: relative; display: grid; width: 124px; height: 124px; place-items: center; justify-self: center; border-radius: 50%; background: conic-gradient(var(--lime) var(--progress), oklch(0.34 0.02 190) 0); }
.goal-dial > div { position: absolute; inset: 9px; display: flex; align-items: center; justify-content: center; gap: 5px; border-radius: inherit; background: var(--hero-bg); }
.goal-dial strong { color: oklch(0.97 0.01 86); font-size: 2rem; line-height: 1; }
.goal-dial span { color: oklch(0.73 0.015 86); font-size: 0.68rem; line-height: 1.2; }

.metric-strip { display: grid; grid-template-columns: repeat(3, 1fr); margin-bottom: 38px; border-block: 1px solid var(--line); }
.metric-strip > div { min-width: 0; padding: 15px 9px; }
.metric-strip > div + div { border-left: 1px solid var(--line); }
.metric-strip span, .metric-strip small { display: block; color: var(--muted); font-size: 0.65rem; }
.metric-strip strong { display: block; margin: 3px 0 2px; font-size: 1.25rem; letter-spacing: -0.035em; }
.metric-strip small { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.home-grid { display: grid; gap: 34px; margin-bottom: 34px; }
.section-block { min-width: 0; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 16px; margin-bottom: 14px; }
.section-head p, .section-head h2 { margin-bottom: 0; }
.section-head > a { color: var(--accent-dark); font-size: 0.76rem; font-weight: 750; }
.queue-list { border-top: 1px solid var(--line); }
.queue-row { display: grid; width: 100%; grid-template-columns: auto minmax(0, 1fr) auto auto; align-items: center; gap: 11px; padding: 13px 2px; border: 0; border-bottom: 1px solid var(--line); background: transparent; text-align: left; cursor: pointer; }
.queue-row > span:nth-child(2), .topic-row > div { min-width: 0; }
.queue-row strong, .queue-row small { display: block; }
.queue-row strong { font-size: 0.9rem; }
.queue-row small { color: var(--muted); font-size: 0.7rem; }
.queue-row b { font-size: 0.9rem; }
.queue-icon { display: grid; width: 38px; height: 38px; place-items: center; border-radius: 11px; }
.queue-icon.due { color: var(--accent-dark); background: var(--accent-soft); }
.queue-icon.mistakes { color: var(--bad); background: var(--bad-soft); }
.queue-icon.saved { color: var(--lime-dark); background: color-mix(in oklch, var(--lime) 30%, var(--surface)); }
.queue-icon.mock { color: oklch(0.2 0.02 190); background: var(--lime); }

.topic-list { border-top: 1px solid var(--line); }
.topic-row { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: 12px; padding: 13px 2px; border-bottom: 1px solid var(--line); }
.topic-row strong, .topic-row small { display: block; }
.topic-row strong { margin-bottom: 6px; font-size: 0.84rem; }
.topic-row small { margin-top: 5px; color: var(--muted); font-size: 0.68rem; }
.topic-row b { font-size: 0.78rem; }
.topic-number { display: inline-grid; width: 30px; height: 30px; place-items: center; border-radius: 9px; background: var(--surface-2); color: var(--ink-soft); font-size: 0.72rem; font-weight: 800; }
.progress-track { height: 5px; overflow: hidden; border-radius: 999px; background: var(--surface-2); }
.progress-track i { display: block; height: 100%; border-radius: inherit; background: var(--accent); transition: width 250ms cubic-bezier(.22,1,.36,1); }

.mock-banner { display: flex; flex-direction: column; align-items: stretch; gap: 18px; padding: 20px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow-sm); }
.mock-banner > div { display: flex; align-items: center; gap: 14px; }
.mock-banner p, .mock-banner h2 { margin-bottom: 0; }
.mock-banner p:last-child { margin-top: 5px; color: var(--muted); font-size: 0.76rem; }

.builder { display: grid; gap: 32px; }
.builder-section { padding-bottom: 28px; border-bottom: 1px solid var(--line); }
.builder-section > h2, .builder-label h2 { margin-bottom: 14px; font-size: 0.92rem; }
.builder-label { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.builder-label output { display: grid; min-width: 42px; height: 34px; place-items: center; border-radius: 10px; background: var(--ink); color: var(--bg); font-weight: 800; }
.segmented { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.segmented label, .filter-pills label, .theme-options label { cursor: pointer; }
.segmented input, .filter-pills input, .topic-picker input, .theme-options input { position: absolute; opacity: 0; pointer-events: none; }
.segmented label > span { display: grid; grid-template-columns: auto 1fr; gap: 2px 10px; min-height: 86px; align-content: center; padding: 16px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.segmented .icon { grid-row: 1 / span 2; align-self: center; color: var(--muted); }
.segmented strong, .segmented small { display: block; }
.segmented small { color: var(--muted); font-size: 0.7rem; }
.segmented input:checked + span { border-color: var(--accent); background: var(--accent-soft); box-shadow: inset 0 0 0 1px var(--accent); }
.segmented input:checked + span .icon { color: var(--accent-dark); }
.range { width: 100%; height: 28px; accent-color: var(--accent); cursor: pointer; }
.filter-pills { display: flex; flex-wrap: wrap; gap: 7px; }
.filter-pills span, .theme-options span { display: inline-flex; min-height: 40px; align-items: center; border: 1px solid var(--line); border-radius: 999px; padding: 7px 13px; background: var(--surface); font-size: 0.78rem; font-weight: 700; }
.filter-pills input:checked + span, .theme-options input:checked + span { border-color: var(--ink); background: var(--ink); color: var(--bg); }
.topic-picker { display: grid; gap: 8px; }
.topic-picker label { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: 11px; min-height: 58px; padding: 8px 10px; border: 1px solid var(--line); border-radius: 13px; background: var(--surface); cursor: pointer; }
.topic-picker strong, .topic-picker small { display: block; }
.topic-picker strong { font-size: 0.82rem; }
.topic-picker small { color: var(--muted); font-size: 0.68rem; }
.topic-picker label > i { display: grid; width: 24px; height: 24px; place-items: center; border: 1px solid var(--line-strong); border-radius: 7px; color: transparent; font-style: normal; }
.topic-picker label:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); }
.topic-picker input:checked ~ i { border-color: var(--accent); background: var(--accent); color: oklch(0.98 0 0); }
.builder-submit { position: sticky; z-index: 10; bottom: calc(74px + env(safe-area-inset-bottom)); display: flex; flex-direction: column; gap: 12px; margin-inline: -8px; padding: 14px; border: 1px solid var(--line); border-radius: var(--radius); background: color-mix(in oklch, var(--surface) 94%, transparent); box-shadow: var(--shadow-lg); backdrop-filter: blur(16px); }
.builder-submit strong, .builder-submit small { display: block; }
.builder-submit small { color: var(--muted); font-size: 0.68rem; }

.progress-summary { display: grid; gap: 0; margin-bottom: 36px; border-block: 1px solid var(--line); }
.progress-summary > div { padding: 20px 6px; }
.progress-summary > div + div { border-top: 1px solid var(--line); }
.accuracy-figure strong { display: block; font-size: 2.8rem; line-height: 1; letter-spacing: -0.06em; }
.accuracy-figure span, .accuracy-figure small, .coverage-figure span, .coverage-figure small { display: block; }
.accuracy-figure span { margin-top: 7px; font-weight: 700; }
.accuracy-figure small, .coverage-figure small { margin-top: 5px; color: var(--muted); }
.coverage-figure > div { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 12px; }
.coverage-figure strong { font-size: 1.8rem; }
.coverage-figure .progress-track { height: 8px; }
.progress-facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.progress-facts > div { display: grid; justify-items: start; gap: 3px; }
.progress-facts span { color: var(--accent-dark); }
.progress-facts strong { font-size: 1.25rem; }
.progress-facts small { color: var(--muted); }
.progress-topics { margin-bottom: 40px; }
.topic-table { border-top: 1px solid var(--line); }
.topic-table-row { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: 11px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.topic-table-row > div { min-width: 0; }
.topic-table-row strong, .topic-table-row small { display: block; }
.topic-table-row strong { overflow: hidden; font-size: 0.82rem; text-overflow: ellipsis; white-space: nowrap; }
.topic-table-row small { color: var(--muted); font-size: 0.67rem; }
.topic-table-row .progress-track { grid-column: 2 / 3; }
.topic-table-row > b { grid-column: 3; grid-row: 1; font-size: 0.78rem; }
.topic-table-row .button { grid-column: 2 / -1; justify-self: start; }
.history-list { border-top: 1px solid var(--line); }
.history-list > div { display: grid; grid-template-columns: auto minmax(0, 1fr) auto auto; align-items: center; gap: 10px; padding: 12px 2px; border-bottom: 1px solid var(--line); }
.history-list strong, .history-list small { display: block; }
.history-list strong { font-size: 0.8rem; }
.history-list small { color: var(--muted); font-size: 0.67rem; }
.history-mark { display: grid; width: 34px; height: 34px; place-items: center; border-radius: 10px; color: var(--accent-dark); background: var(--accent-soft); }
.history-mark.mock { color: var(--lime-dark); background: color-mix(in oklch, var(--lime) 30%, var(--surface)); }
.empty-state { display: grid; min-height: 280px; place-items: center; align-content: center; padding: 30px 20px; text-align: center; }
.empty-state > span { display: grid; width: 58px; height: 58px; place-items: center; border-radius: 17px; background: var(--surface-2); color: var(--accent-dark); }
.empty-state h3 { margin: 14px 0 5px; }
.empty-state p { max-width: 42ch; color: var(--muted); }

.tabs { display: flex; gap: 4px; overflow-x: auto; margin-bottom: 18px; padding-bottom: 6px; scrollbar-width: none; }
.tabs::-webkit-scrollbar { display: none; }
.tabs a { display: inline-flex; flex: 0 0 auto; min-height: 40px; align-items: center; gap: 8px; border-radius: 999px; padding: 8px 12px; color: var(--muted); font-size: 0.78rem; font-weight: 700; }
.tabs a b { display: grid; min-width: 22px; height: 22px; place-items: center; border-radius: 999px; background: var(--surface-2); font-size: 0.66rem; }
.tabs a.active { background: var(--ink); color: var(--bg); }
.tabs a.active b { background: color-mix(in oklch, var(--bg) 20%, transparent); }
.review-list { border-top: 1px solid var(--line); }
.review-row { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: start; gap: 10px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.review-question { min-width: 0; border: 0; padding: 0; background: transparent; text-align: left; cursor: pointer; }
.review-question strong { display: -webkit-box; overflow: hidden; font-size: 0.8rem; font-weight: 650; -webkit-box-orient: vertical; -webkit-line-clamp: 2; }
.review-question small { display: block; margin-top: 5px; color: var(--muted); font-size: 0.66rem; }
.review-row .icon-button { width: 36px; height: 36px; }

.settings-grid { display: grid; }
.settings-section { display: grid; gap: 18px; padding: 26px 0; border-top: 1px solid var(--line); }
.settings-section > div:first-child p { max-width: 50ch; margin: 0; color: var(--muted); font-size: 0.8rem; }
.settings-fields { display: grid; gap: 12px; }
.settings-fields label span { display: block; margin-bottom: 6px; color: var(--muted); font-size: 0.72rem; font-weight: 700; }
.settings-fields input { width: 100%; min-height: 46px; border: 1px solid var(--line); border-radius: 11px; padding: 9px 11px; background: var(--surface); color: var(--ink); }
.theme-options, .data-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.file-button { position: relative; overflow: hidden; }
.file-button input { position: absolute; inset: 0; opacity: 0; cursor: pointer; }
.settings-save { position: sticky; bottom: calc(76px + env(safe-area-inset-bottom)); display: flex; align-items: center; justify-content: flex-end; gap: 14px; padding: 12px 0; background: var(--bg); }
.settings-save span { color: var(--good); font-size: 0.78rem; font-weight: 700; }
.app-footer { display: flex; flex-wrap: wrap; gap: 10px 20px; padding: 24px 0; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.7rem; }
.app-footer .install-button { margin-left: auto; }

.study-shell { min-height: 100dvh; background: var(--bg); }
.study-topbar, .result-top { position: sticky; z-index: 20; top: 0; display: grid; min-height: 64px; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: 12px; padding: max(10px, env(safe-area-inset-top)) 14px 10px; border-bottom: 1px solid var(--line); background: color-mix(in oklch, var(--bg) 94%, transparent); backdrop-filter: blur(14px); }
.study-topbar > div { min-width: 0; text-align: center; }
.study-topbar strong, .study-topbar span { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.study-topbar strong { font-size: 0.82rem; }
.study-topbar span { color: var(--muted); font-size: 0.68rem; }
.study-progress { position: sticky; z-index: 21; top: 63px; height: 3px; border-radius: 0; }
.session-timer { min-width: 60px; color: var(--ink-soft); font-variant-numeric: tabular-nums; font-weight: 800; text-align: right; }
.session-timer.urgent { color: var(--bad); }
.question-stage { width: min(100%, 880px); margin: 0 auto; padding: 24px 16px 190px; }
.question-card { min-width: 0; }
.question-meta { display: flex; align-items: center; gap: 8px; margin-bottom: 18px; color: var(--muted); font-size: 0.69rem; }
.question-meta span:last-child { margin-left: auto; }
.question-card h1 { max-width: 34ch; margin-bottom: 25px; font-size: 1.18rem; line-height: 1.42; letter-spacing: -0.015em; white-space: pre-wrap; }
.answer-list { display: grid; gap: 9px; }
.answer-option { display: grid; width: 100%; min-height: 58px; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: 11px; border: 1px solid var(--line); border-radius: 14px; padding: 11px; background: var(--surface); text-align: left; cursor: pointer; transition: border-color 160ms ease, background 160ms ease, transform 160ms cubic-bezier(.22,1,.36,1); }
.answer-option > span { display: grid; width: 32px; height: 32px; place-items: center; border: 1px solid var(--line-strong); border-radius: 9px; color: var(--ink-soft); font-size: 0.72rem; font-weight: 800; }
.answer-option strong { font-size: 0.82rem; font-weight: 600; line-height: 1.42; }
.answer-option.selected { border-color: var(--accent); background: var(--accent-soft); }
.answer-option.correct { border-color: var(--good); background: var(--good-soft); opacity: 1; }
.answer-option.correct > span { border-color: var(--good); background: var(--good); color: oklch(0.98 0 0); }
.answer-option.wrong { border-color: var(--bad); background: var(--bad-soft); opacity: 1; }
.answer-option.wrong > span { border-color: var(--bad); color: var(--bad); }
.answer-option.muted { opacity: 0.52; }
.answer-feedback { margin-top: 22px; padding-top: 20px; border-top: 1px solid var(--line); }
.feedback-verdict { display: flex; align-items: center; gap: 11px; margin-bottom: 13px; }
.feedback-verdict > span { display: grid; width: 42px; height: 42px; place-items: center; border-radius: 12px; }
.answer-feedback.is-correct .feedback-verdict > span { color: var(--good); background: var(--good-soft); }
.answer-feedback.is-wrong .feedback-verdict > span { color: var(--bad); background: var(--bad-soft); }
.feedback-verdict p, .feedback-verdict strong { display: block; margin: 0; }
.feedback-verdict p { font-weight: 800; }
.feedback-verdict strong { color: var(--muted); font-size: 0.72rem; }
.answer-feedback > p { max-width: 72ch; color: var(--ink-soft); font-size: 0.85rem; line-height: 1.6; white-space: pre-wrap; }
.answer-feedback > small { color: var(--muted); font-size: 0.7rem; }
.study-actions { position: fixed; z-index: 30; right: 0; bottom: 0; left: 0; padding: 11px 14px max(12px, env(safe-area-inset-bottom)); border-top: 1px solid var(--line); background: color-mix(in oklch, var(--surface) 96%, transparent); backdrop-filter: blur(18px); }
.keyboard-hint { display: block; color: var(--muted); font-size: 0.7rem; text-align: center; }
.rating-prompt { width: min(100%, 720px); margin: 0 auto; }
.rating-prompt > span { display: block; margin-bottom: 7px; color: var(--muted); font-size: 0.67rem; font-weight: 700; text-align: center; }
.rating-prompt > div { display: grid; grid-template-columns: repeat(3, 1fr); gap: 7px; }
.rating { min-height: 52px; border: 1px solid var(--line); border-radius: 12px; padding: 7px 5px; background: var(--surface); cursor: pointer; }
.rating strong, .rating small { display: block; }
.rating strong { font-size: 0.75rem; }
.rating small { color: var(--muted); font-size: 0.62rem; }
.rating.again { border-color: color-mix(in oklch, var(--bad) 50%, var(--line)); }
.rating.good { border-color: color-mix(in oklch, var(--good) 55%, var(--line)); background: var(--good-soft); }
.mock-action { display: flex; width: min(100%, 880px); align-items: center; justify-content: space-between; gap: 14px; margin: 0 auto; }
.mock-action > span { color: var(--muted); font-size: 0.72rem; }

.result-top { grid-template-columns: auto 1fr auto; text-align: center; }
.results-page { width: min(100%, 980px); margin: 0 auto; padding: 34px 18px 80px; }
.result-hero { display: grid; gap: 26px; align-items: center; padding: 28px 0 34px; }
.result-score { display: grid; width: 160px; height: 160px; place-items: center; align-content: center; border-radius: 50%; background: var(--ink); color: var(--bg); box-shadow: var(--shadow-lg); }
.result-score strong, .result-score span { display: block; }
.result-score strong { font-size: 2.8rem; line-height: 1; letter-spacing: -0.06em; }
.result-score span { margin-top: 7px; font-size: 0.67rem; }
.result-hero > div:last-child > p:not(.eyebrow) { max-width: 56ch; color: var(--muted); }
.result-breakdown { display: grid; grid-template-columns: repeat(2, 1fr); margin-bottom: 44px; border-block: 1px solid var(--line); }
.result-breakdown div { padding: 16px 8px; }
.result-breakdown div:nth-child(even) { border-left: 1px solid var(--line); }
.result-breakdown span, .result-breakdown strong { display: block; }
.result-breakdown span { color: var(--muted); font-size: 0.68rem; }
.result-breakdown strong { margin-top: 3px; font-size: 1.25rem; }
.result-review { border-top: 1px solid var(--line); }
.result-review button { display: grid; width: 100%; grid-template-columns: auto minmax(0, 1fr) auto; align-items: start; gap: 10px; padding: 14px 0; border: 0; border-bottom: 1px solid var(--line); background: transparent; text-align: left; cursor: pointer; }
.result-review strong, .result-review small { display: -webkit-box; overflow: hidden; -webkit-box-orient: vertical; }
.result-review strong { font-size: 0.8rem; -webkit-line-clamp: 2; }
.result-review small { margin-top: 5px; color: var(--muted); font-size: 0.67rem; -webkit-line-clamp: 2; }

.toast { position: fixed; z-index: 200; right: 16px; bottom: calc(88px + env(safe-area-inset-bottom)); left: 16px; transform: translateY(20px); padding: 12px 15px; border-radius: 12px; background: var(--ink); color: var(--bg); box-shadow: var(--shadow-lg); font-size: 0.8rem; font-weight: 700; opacity: 0; pointer-events: none; transition: opacity 180ms ease, transform 180ms cubic-bezier(.22,1,.36,1); }
.toast.show { transform: translateY(0); opacity: 1; }

@media (hover: hover) {
  .button:hover:not(:disabled), .answer-option:hover:not(:disabled), .topic-picker label:hover, .segmented label:hover > span { border-color: var(--line-strong); }
  .queue-row:hover:not(:disabled), .review-row:hover, .result-review button:hover { background: color-mix(in oklch, var(--surface-2) 52%, transparent); }
  .nav-item:hover { color: var(--ink); }
}

@media (pointer: coarse) {
  .button, .answer-option, .queue-row, .nav-item { min-height: 48px; }
}

@media (min-width: 560px) {
  .page { padding-inline: 28px; }
  .today-panel { grid-template-columns: minmax(0, 1fr) auto; padding: 32px; }
  .goal-dial { width: 140px; height: 140px; }
  .streak-badge span { display: inline; }
  .mock-banner { flex-direction: row; align-items: center; justify-content: space-between; }
  .builder-submit { flex-direction: row; align-items: center; justify-content: space-between; }
  .builder-submit .button { flex: 0 0 auto; }
  .topic-picker { grid-template-columns: 1fr 1fr; }
  .settings-fields { grid-template-columns: 1fr 1fr; }
  .result-hero { grid-template-columns: auto minmax(0, 1fr); }
  .result-breakdown { grid-template-columns: repeat(4, 1fr); }
  .result-breakdown div { border-left: 1px solid var(--line); }
  .result-breakdown div:first-child { border-left: 0; }
  .toast { right: 20px; bottom: 20px; left: auto; max-width: 360px; }
}

@media (min-width: 760px) {
  h1 { font-size: 2.45rem; }
  .page { padding-top: 46px; }
  .home-grid { grid-template-columns: 1fr 1fr; gap: 42px; }
  .progress-summary { grid-template-columns: 1fr 1.15fr 1fr; }
  .progress-summary > div { padding: 24px; }
  .progress-summary > div + div { border-top: 0; border-left: 1px solid var(--line); }
  .topic-table-row { grid-template-columns: auto minmax(200px, 1fr) minmax(130px, .6fr) auto auto; }
  .topic-table-row .progress-track { grid-column: auto; }
  .topic-table-row > b { grid-column: auto; grid-row: auto; }
  .topic-table-row .button { grid-column: auto; justify-self: auto; }
  .settings-section { grid-template-columns: minmax(220px, .85fr) minmax(300px, 1.15fr); gap: 40px; }
  .question-stage { padding: 42px 28px 190px; }
  .question-card h1 { font-size: 1.38rem; }
  .answer-option { min-height: 64px; padding: 13px 15px; }
  .answer-option strong { font-size: 0.9rem; }
  .result-hero { padding-block: 54px; }
}

@media (min-width: 960px) {
  .app-shell { display: grid; grid-template-columns: var(--sidebar) minmax(0, 1fr); }
  .sidebar { position: sticky; top: 0; display: flex; height: 100vh; flex-direction: column; padding: 28px 20px 22px; border-right: 1px solid var(--line); background: var(--surface); }
  .sidebar nav { display: grid; gap: 5px; margin-top: 44px; }
  .sidebar .nav-item { flex-direction: row; justify-content: flex-start; gap: 12px; min-height: 44px; padding: 8px 11px; border-radius: 11px; font-size: 0.82rem; }
  .sidebar-foot { margin-top: auto; color: var(--muted); font-size: 0.69rem; }
  .mini-progress { height: 4px; margin-top: 8px; overflow: hidden; border-radius: 999px; background: var(--surface-2); }
  .mini-progress i { display: block; height: 100%; background: var(--accent); }
  .mobile-top, .bottom-nav { display: none; }
  .page { min-height: 100vh; padding: 56px 42px 80px; }
  .builder-submit, .settings-save { bottom: 18px; }
  .today-panel { padding: 40px; }
  .today-copy h2 { font-size: 1.85rem; }
  .goal-dial { width: 156px; height: 156px; }
  .metric-strip > div { padding: 20px; }
  .metric-strip span, .metric-strip small { font-size: 0.72rem; }
  .metric-strip strong { font-size: 1.5rem; }
  .study-topbar, .result-top { padding-inline: 26px; }
  .question-stage { padding-top: 58px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
}