/* ==========================================================================
   Heureux — design system
   ========================================================================== */

:root {
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;
  --font-serif: "Newsreader", "Iowan Old Style", "Palatino Linotype", Palatino,
    Georgia, serif;

  --bg: #f4f6f9;
  --bg-soft: #e8edf3;
  --surface: #ffffff;
  --surface-2: #f8fafc;
  --border: #e1e7ef;
  --border-strong: #ccd5e1;
  --text: #131720;
  --text-soft: #454f5e;
  --text-faint: #7a8492;

  --primary: #2563eb;
  --primary-soft: #e5edfd;
  --primary-ink: #ffffff;

  --accent: #c8a23a;
  --accent-soft: #f5ecd2;
  --accent-ink: #131720;

  --again: #c1121f;
  --hard: #a9782a;
  --good: #2563eb;
  --easy: #4f83f0;

  --new: #94a3b8;
  --learn: #c8a23a;
  --review: #3f6fd8;
  --mature: #1b3a8f;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06),
    0 1px 3px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.09),
    0 2px 8px -2px rgba(15, 23, 42, 0.07);
  --shadow-lg: 0 18px 40px -12px rgba(15, 23, 42, 0.28);

  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --maxw: 1080px;
}

[data-theme="dark"] {
  --bg: #0b1120;
  --bg-soft: #121a2c;
  --surface: #141d30;
  --surface-2: #1a2439;
  --border: #27334c;
  --border-strong: #37445f;
  --text: #eef2f8;
  --text-soft: #b4bece;
  --text-faint: #7d879b;

  --primary: #7ea6e0;
  --primary-soft: #1b2c48;
  --primary-ink: #0b1120;

  --accent: #d8b45a;
  --accent-soft: #2a2411;
  --accent-ink: #0b1120;

  --again: #ef5a6a;
  --hard: #d8b45a;
  --good: #7ea6e0;
  --easy: #9cc0ee;

  --new: #8b97ab;
  --learn: #d8b45a;
  --review: #6f9ad6;
  --mature: #b9cdec;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 6px 16px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 24px 50px -12px rgba(0, 0, 0, 0.6);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 0.4em; font-weight: 600; }
h1 { font-size: clamp(1.6rem, 3vw, 2.1rem); letter-spacing: -0.02em; }
h2 { font-size: 1.3rem; letter-spacing: -0.01em; }

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--primary);
  color: var(--primary-ink);
  padding: 0.5rem 1rem;
  z-index: 100;
  border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* ---------- Navigation ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0.6rem 1.2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 700;
  color: var(--text);
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}
.brand:hover { text-decoration: none; }
.brand__mark {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #1a3f9e, #2f6bef);
  color: var(--accent);
  border-radius: 9px;
  font-family: "Book Antiqua", "Palatino Linotype", Palatino, Georgia, serif;
  font-style: italic;
  font-weight: 700;
  font-size: 1.15rem;
  box-shadow: var(--shadow-sm);
}
.nav__links {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.nav__links > a {
  color: var(--text-soft);
  padding: 0.4rem 0.7rem;
  border-radius: 9px;
  font-weight: 500;
  font-size: 0.94rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}
.nav__links > a:hover { background: var(--bg-soft); color: var(--text); text-decoration: none; }
.nav__links > a.is-active { color: var(--primary); background: var(--primary-soft); }
.nav__search input {
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  border-radius: 999px;
  padding: 0.4rem 0.9rem;
  font-size: 0.9rem;
  width: 9rem;
  transition: width 0.2s ease, box-shadow 0.2s ease;
}
.nav__search input:focus { outline: none; width: 12rem; box-shadow: 0 0 0 3px var(--primary-soft); }
.nav__icon {
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text-soft);
  width: 36px;
  height: 36px;
  border-radius: 10px;
  cursor: pointer;
  display: grid;
  place-items: center;
  font-size: 1rem;
  position: relative;
}
.nav__icon:hover { color: var(--text); border-color: var(--border-strong); text-decoration: none; }
.nav__icon.is-active { color: var(--primary); border-color: var(--primary); }
.theme-icon { position: absolute; transition: opacity 0.2s, transform 0.3s; }
[data-theme="light"] .theme-icon--moon { opacity: 0; transform: rotate(-90deg); }
[data-theme="dark"] .theme-icon--sun { opacity: 0; transform: rotate(90deg); }

.nav__toggle { display: none; }

.pill {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.05rem 0.42rem;
  border-radius: 999px;
  background: var(--bg-soft);
  color: var(--text-soft);
  line-height: 1.5;
}
.pill--due { background: var(--primary); color: var(--primary-ink); }

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2rem 1.2rem 3rem;
  flex: 1;
}
.stack > * + * { margin-top: 1.2rem; }
.page-head { margin-bottom: 1.5rem; }
.page-head p { color: var(--text-soft); margin: 0.2rem 0 0; }
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-faint);
}

.grid { display: grid; gap: 1rem; }
.grid--tiles { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
.grid--decks { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }

/* ---------- Cards / surfaces ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.card--pad { padding: 1.25rem 1.4rem; }

.tile {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.2rem;
  box-shadow: var(--shadow-sm);
}
.tile__label { color: var(--text-faint); font-size: 0.82rem; font-weight: 600; }
.tile__value { font-size: 2rem; font-weight: 700; letter-spacing: -0.02em; margin-top: 0.15rem; }
.tile__sub { color: var(--text-soft); font-size: 0.85rem; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
  padding: 0.6rem 1.1rem;
  border-radius: 11px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: transform 0.08s ease, box-shadow 0.2s ease, background 0.2s;
}
.btn:hover { text-decoration: none; box-shadow: var(--shadow-md); transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn--primary { background: var(--primary); color: var(--primary-ink); border-color: transparent; }
.btn--lg { padding: 0.85rem 1.6rem; font-size: 1.05rem; border-radius: 13px; }
.btn--sm { padding: 0.4rem 0.9rem; font-size: 0.85rem; border-radius: 9px; }
.btn--ghost { background: transparent; }
.btn--block { width: 100%; }

/* ---------- Chips / badges ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.76rem;
  font-weight: 600;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  background: var(--bg-soft);
  color: var(--text-soft);
  border: 1px solid var(--border);
}
.chip--theme { color: #fff; border: none; background: var(--chip, var(--primary)); }
.chip--active { background: var(--primary); color: var(--primary-ink); border-color: transparent; }
.chip--sm { font-size: 0.72rem; padding: 0.12rem 0.5rem; }
.chip--muted { opacity: 0.45; }
.chip__n { font-weight: 700; opacity: 0.85; }
.chip--active .chip__n { opacity: 1; }

/* ---------- Scope filter (Browse / Stats) ---------- */
.scope-filter { display: flex; flex-direction: column; gap: 0.5rem; margin: -0.3rem 0 1.5rem; }
.scope-filter__row { display: flex; flex-wrap: wrap; gap: 0.4rem; align-items: center; }
.scope-filter__row .chip { text-decoration: none; }
.scope-filter__row .chip:hover { border-color: var(--primary); color: var(--text); }
.scope-filter__row .chip--active:hover { color: var(--primary-ink); }
.scope-filter__action { display: flex; align-items: center; gap: 0.75rem; flex-wrap: wrap; margin-top: 0.15rem; }
.scope-filter__label { font-size: 0.82rem; }
.dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.state-new { color: var(--new); }
.state-learning { color: var(--learn); }
.state-relearning { color: var(--learn); }
.state-review { color: var(--review); }
.bg-new { background: var(--new); }
.bg-learning { background: var(--learn); }
.bg-relearning { background: var(--learn); }
.bg-review { background: var(--review); }
.bg-mature { background: var(--mature); }

/* ---------- Progress ---------- */
.progress {
  height: 8px;
  border-radius: 999px;
  background: var(--bg-soft);
  overflow: hidden;
  display: flex;
}
.progress > span { display: block; height: 100%; }
.progress__label {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-soft);
  margin-bottom: 0.35rem;
}

/* ---------- Hero (dashboard) ---------- */
.hero {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  padding: 2rem 2.2rem;
  color: #fff;
  background:
    radial-gradient(120% 140% at 100% 0%, var(--accent) 0%, transparent 42%),
    linear-gradient(135deg, #1a3f9e, #2456c9 55%, #2f6bef);
  box-shadow: var(--shadow-lg);
}
.hero h1 { color: #fff; margin-bottom: 0.3rem; }
.hero__lead { color: rgba(255, 255, 255, 0.85); max-width: 42ch; margin: 0 0 1.3rem; }
.hero__stats { display: flex; flex-wrap: wrap; gap: 1.6rem; margin-bottom: 1.5rem; }
.hero__stat b { display: block; font-size: 1.9rem; font-weight: 700; line-height: 1; }
.hero__stat span { color: rgba(255,255,255,0.8); font-size: 0.85rem; }
.hero__actions { display: flex; gap: 0.7rem; flex-wrap: wrap; }
.hero .btn--primary { background: #fff; color: var(--primary); }
.hero .btn--ghost { border-color: rgba(255,255,255,0.5); color: #fff; }

/* ---------- Deck cards ---------- */
.deck {
  display: block;
  color: var(--text);
  position: relative;
  overflow: hidden;
}
.deck:hover {
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: color-mix(in srgb, var(--deck-color, var(--primary)) 45%, var(--border));
}
.deck__body { padding: 1.2rem 1.3rem 1.3rem; }
.deck__title { display: flex; align-items: center; gap: 0.7rem; font-weight: 600; font-size: 1.05rem; }
.deck__icon {
  flex: none;
  width: 40px; height: 40px;
  display: grid; place-items: center;
  font-size: 1.3rem; line-height: 1;
  border-radius: 11px;
  background: color-mix(in srgb, var(--deck-color, var(--primary)) 15%, var(--surface));
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--deck-color, var(--primary)) 22%, transparent);
}
.deck__emoji { font-size: 1.25rem; }
.deck__meta { color: var(--text-faint); font-size: 0.82rem; margin: 0.75rem 0 0.85rem; }
.deck__due { margin-left: auto; }

/* ---------- Exam hierarchy ---------- */
.exam-part { margin-top: 1.6rem; }
.exam-part__head { display: flex; align-items: center; gap: 0.85rem; margin: 0 0 0.9rem; }
.exam-part__emoji {
  flex: none;
  width: 46px; height: 46px;
  display: grid; place-items: center;
  font-size: 1.45rem; line-height: 1;
  border-radius: 13px;
  background: color-mix(in srgb, var(--deck-color, var(--primary)) 15%, var(--surface));
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--deck-color, var(--primary)) 24%, transparent);
}
.exam-part__title { display: flex; flex-direction: column; }
.exam-part__title h3 { margin: 0; font-size: 1.15rem; }
.exam-part__tag { color: var(--text-faint); font-size: 0.8rem; font-weight: 600; letter-spacing: 0.02em; }
.exam-part__head .badge-soon { margin-left: auto; }

.badge-soon {
  display: inline-block;
  font-size: 0.68rem; font-weight: 700;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--text-faint);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.15rem 0.55rem;
}
.badge-soon--lg { font-size: 0.82rem; padding: 0.3rem 0.9rem; margin: 0.6rem 0; }

.deck--soon { opacity: 0.62; }
.deck--soon .deck__icon { filter: grayscale(0.7); }
.deck--soon:hover { opacity: 0.85; transform: translateY(-1px); }
.deck--soon .badge-soon { margin-left: auto; }

.toolkit { margin-top: 1.8rem; }

.empty--soon { padding: 3rem 1rem; }
.empty__icon { font-size: 3rem; line-height: 1; margin-bottom: 0.4rem; }
.empty--soon h1 { margin: 0.3rem 0; }

/* ---------- Review screen ---------- */
.review {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - 220px);
}
.review__top {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}
.review__scope { font-weight: 600; }
.review__counters { margin-left: auto; display: flex; gap: 0.9rem; font-size: 0.85rem; font-weight: 600; }
.review__counters .c-new { color: var(--new); }
.review__counters .c-learn { color: var(--learn); }
.review__counters .c-review { color: var(--review); }
.review__bar { height: 4px; background: var(--bg-soft); border-radius: 999px; overflow: hidden; margin-bottom: 1.4rem; }
.review__bar > span { display: block; height: 100%; background: var(--primary); width: 0; transition: width 0.4s ease; }

.flashcard {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 1.8rem;
  min-height: 320px;
  display: flex;
  flex-direction: column;
}
.flashcard__head {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1.1rem;
  flex-wrap: wrap;
}
.flashcard__type { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.1em; font-weight: 700; color: var(--text-faint); }

.prompt-text {
  font-family: var(--font-serif);
  font-size: clamp(1.3rem, 2.6vw, 1.7rem);
  line-height: 1.4;
  color: var(--text);
}
.cue-text { font-size: 1.5rem; font-weight: 600; }
.cue-hint { color: var(--text-soft); margin-top: 0.6rem; font-style: italic; }
.instruction {
  margin-top: auto;
  padding-top: 1.2rem;
  color: var(--text-faint);
  font-size: 0.9rem;
}

.answer { animation: fade-in 0.25s ease; }
@keyframes fade-in { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

.divider { height: 1px; background: var(--border); margin: 1.3rem 0; border: 0; }

.spine-block { margin-bottom: 1.1rem; }
.spine-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.2rem;
}
.spine-text { font-family: var(--font-serif); font-size: 1.08rem; line-height: 1.5; }
.arg {
  border-left: 3px solid var(--border-strong);
  padding: 0.1rem 0 0.1rem 0.9rem;
  margin-bottom: 0.9rem;
}
.arg__idea { font-weight: 600; }
.arg__parts { margin-top: 0.35rem; display: grid; gap: 0.3rem; }
.arg__part { font-size: 0.93rem; color: var(--text-soft); }
.arg__part b { color: var(--text); font-weight: 600; }

.example-box {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.9rem 1.1rem;
  font-family: var(--font-serif);
  font-size: 1.05rem;
}
.example-box mark {
  background: color-mix(in srgb, var(--accent) 30%, transparent);
  color: inherit;
  padding: 0 0.15em;
  border-radius: 4px;
}

details.full-answer { margin-top: 1rem; }
details.full-answer > summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--primary);
  list-style: none;
}
details.full-answer > summary::-webkit-details-marker { display: none; }
details.full-answer > summary::before { content: "▸ "; }
details.full-answer[open] > summary::before { content: "▾ "; }
.answer-body { margin-top: 0.8rem; }
.answer-body h3 { font-size: 0.95rem; color: var(--text); margin-top: 1rem; }
.answer-body h4 { font-size: 0.85rem; color: var(--text-soft); margin: 0.6rem 0 0.1rem; }
.answer-body .sec-label {
  font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--primary); font-weight: 700; margin-top: 0.8rem;
}
.answer-body p { margin: 0.15rem 0; font-family: var(--font-serif); }

/* ---------- Answer controls ---------- */
.controls { margin-top: 1.4rem; }
.reveal-btn {
  width: 100%;
  padding: 1rem;
  font-size: 1.05rem;
  font-weight: 600;
  border-radius: 13px;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}
.reveal-btn:hover { box-shadow: var(--shadow-md); }
.grades { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.6rem; }
.grade {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 13px;
  padding: 0.7rem 0.4rem 0.6rem;
  cursor: pointer;
  text-align: center;
  transition: transform 0.08s, box-shadow 0.2s;
}
.grade:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.grade__key {
  display: inline-grid;
  place-items: center;
  width: 22px; height: 22px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  background: var(--bg-soft);
  color: var(--text-soft);
  margin-bottom: 0.3rem;
}
.grade__label { font-weight: 600; font-size: 0.95rem; display: block; }
.grade__int { font-size: 0.78rem; color: var(--text-faint); }
.grade--again { border-bottom: 3px solid var(--again); }
.grade--again .grade__label { color: var(--again); }
.grade--hard { border-bottom: 3px solid var(--hard); }
.grade--hard .grade__label { color: var(--hard); }
.grade--good { border-bottom: 3px solid var(--good); }
.grade--good .grade__label { color: var(--good); }
.grade--easy { border-bottom: 3px solid var(--easy); }
.grade--easy .grade__label { color: var(--easy); }

.kbd-hint { text-align: center; color: var(--text-faint); font-size: 0.8rem; margin-top: 0.9rem; }
kbd {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  border: 1px solid var(--border-strong);
  border-bottom-width: 2px;
  border-radius: 5px;
  padding: 0.05rem 0.35rem;
  background: var(--surface-2);
}

/* ---------- Review actions (undo / suspend) ---------- */
.review__actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.6rem;
  margin: 1.4rem auto 0;
  max-width: 44rem;
}
.linkbtn {
  background: none;
  border: none;
  color: var(--text-soft);
  font: inherit;
  font-size: 0.82rem;
  cursor: pointer;
  padding: 0.35rem 0.55rem;
  border-radius: 8px;
  transition: background 0.15s ease, color 0.15s ease;
}
.linkbtn:hover:not(:disabled) { background: var(--bg-soft); color: var(--text); }
.linkbtn:disabled { opacity: 0.4; cursor: default; }
.linkbtn--muted { color: var(--text-faint); }

.session-summary {
  margin: 0.4rem auto 0.9rem;
  color: var(--text-soft);
  font-size: 1.02rem;
}
.session-summary strong { color: var(--text); }

/* ---------- Done / empty ---------- */
.done-state { text-align: center; padding: 3rem 1rem; }
.done-state__emoji { font-size: 3.4rem; }
.done-state h2 { margin-top: 0.6rem; }
.done-state p { color: var(--text-soft); }

/* ---------- Lists / tables ---------- */
.qlist { display: flex; flex-direction: column; gap: 0.5rem; }
.qrow {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.75rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}
.qrow:hover { border-color: var(--border-strong); box-shadow: var(--shadow-sm); text-decoration: none; }
.qrow__num {
  flex: none;
  width: 30px; height: 30px;
  display: grid; place-items: center;
  border-radius: 8px;
  background: var(--bg-soft);
  color: var(--text-soft);
  font-weight: 700;
  font-size: 0.8rem;
}
.qrow__text { color: var(--text); font-family: var(--font-serif); font-size: 1.02rem; }
.qrow__meta { margin-left: auto; display: flex; align-items: center; gap: 0.5rem; flex: none; }
.qrow__state { width: 10px; height: 10px; border-radius: 50%; }

.alias-tag {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  border: 1px dashed var(--border-strong);
  border-radius: 6px;
  padding: 0 0.35rem;
}

/* ---------- Phrases ---------- */
.phrase {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.15rem;
  box-shadow: var(--shadow-sm);
}
.phrase__expr { font-family: var(--font-serif); font-size: 1.12rem; font-weight: 500; }
.phrase__cue { color: var(--text-soft); font-size: 0.9rem; margin-top: 0.15rem; }
.phrase__ex { margin-top: 0.6rem; font-family: var(--font-serif); color: var(--text); }
.phrase__ex mark { background: color-mix(in srgb, var(--accent) 32%, transparent); border-radius: 4px; padding: 0 0.12em; }
.phrase__foot { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.7rem; align-items: center; }
.phrase__note { color: var(--text-faint); font-size: 0.82rem; font-style: italic; }

.cat-nav { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1.4rem; }
.cat-nav a { font-size: 0.85rem; }

/* ---------- Detail (response) ---------- */
.detail-head { margin-bottom: 1.4rem; }
.detail-prompt { font-family: var(--font-serif); font-size: clamp(1.4rem, 3vw, 1.9rem); line-height: 1.35; }
.answer-columns { display: grid; gap: 1.2rem; }
.section-card { padding: 1.2rem 1.4rem; }
.detail-grid { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 1.4rem; align-items: start; }
.detail-side { display: grid; gap: 1rem; }
.kv { display: grid; gap: 0.35rem; margin: 0.8rem 0 1rem; }
.kv > div { display: flex; justify-content: space-between; font-size: 0.9rem; }
.kv dt { color: var(--text-soft); margin: 0; }
.kv dd { margin: 0; font-weight: 600; }
.state-line { display: flex; align-items: center; gap: 0.5rem; margin: 0.4rem 0 0.2rem; }
.reform { font-family: var(--font-serif); font-style: italic; color: var(--text-soft); font-size: 1.1rem; }
.position-claire { font-family: var(--font-serif); }
.grid--phrases { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.phrase-group { margin-bottom: 1.8rem; }
.search-form { display: flex; gap: 0.6rem; margin-top: 0.9rem; }
.search-form__input {
  flex: 1;
  padding: 0.75rem 1rem;
  border-radius: 12px;
  border: 1px solid var(--border-strong);
  background: var(--surface-2);
  color: var(--text);
  font-size: 1.02rem;
}
.empty { text-align: center; color: var(--text-soft); padding: 2.4rem 1rem; }
.mini-list { margin: 0.4rem 0 0; padding-left: 1.1rem; }
.mini-list li { margin-bottom: 0.35rem; }

/* ---------- Stats ---------- */
.bars { display: flex; align-items: flex-end; gap: 3px; height: 140px; }
.bars__col { flex: 1; display: flex; flex-direction: column; justify-content: flex-end; align-items: center; gap: 4px; }
.bars__bar { width: 100%; background: var(--primary); border-radius: 4px 4px 0 0; min-height: 2px; transition: height 0.3s; }
.bars__bar--soft { background: color-mix(in srgb, var(--primary) 45%, var(--bg-soft)); }

.heatmap { display: grid; grid-auto-flow: column; grid-template-rows: repeat(7, 1fr); gap: 3px; overflow-x: auto; padding-bottom: 0.3rem; }
.heat-cell { width: 13px; height: 13px; border-radius: 3px; background: var(--bg-soft); }
.heat-cell[data-level="1"] { background: color-mix(in srgb, var(--primary) 30%, var(--bg-soft)); }
.heat-cell[data-level="2"] { background: color-mix(in srgb, var(--primary) 50%, var(--bg-soft)); }
.heat-cell[data-level="3"] { background: color-mix(in srgb, var(--primary) 72%, var(--bg-soft)); }
.heat-cell[data-level="4"] { background: var(--primary); }

.legend { display: flex; gap: 1rem; flex-wrap: wrap; font-size: 0.82rem; color: var(--text-soft); }
.legend span { display: inline-flex; align-items: center; gap: 0.35rem; }

/* ---------- Forms ---------- */
.field { margin-bottom: 1.1rem; }
.field label { display: block; font-weight: 600; margin-bottom: 0.3rem; }
.field small { color: var(--text-faint); display: block; margin-top: 0.25rem; }
.field input[type="number"] {
  width: 130px;
  padding: 0.55rem 0.7rem;
  border-radius: 10px;
  border: 1px solid var(--border-strong);
  background: var(--surface-2);
  color: var(--text);
  font-size: 1rem;
}
.notice {
  padding: 0.7rem 1rem;
  border-radius: 10px;
  background: var(--primary-soft);
  color: var(--text);
  border: 1px solid color-mix(in srgb, var(--primary) 30%, transparent);
  margin-bottom: 1.2rem;
}
.danger-zone { border-color: color-mix(in srgb, var(--again) 40%, var(--border)); }
.btn--danger { color: var(--again); border-color: color-mix(in srgb, var(--again) 40%, var(--border-strong)); }

/* ---------- Utilities ---------- */
.muted { color: var(--text-soft); }
.faint { color: var(--text-faint); }
.center { text-align: center; }
.row { display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; }
.between { justify-content: space-between; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.hidden { display: none !important; }
.serif { font-family: var(--font-serif); }

/* ---------- Responsive ---------- */
@media (max-width: 760px) {
  .nav__toggle {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    margin-left: auto;
    width: 40px; height: 36px;
    border: 1px solid var(--border);
    border-radius: 9px;
    background: var(--surface-2);
    cursor: pointer;
  }
  .nav__toggle span { display: block; height: 2px; width: 18px; margin: 0 auto; background: var(--text); border-radius: 2px; }
  .nav__links {
    position: fixed;
    inset: 56px 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0.2rem;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 0.8rem 1.2rem 1.1rem;
    box-shadow: var(--shadow-lg);
    transform: translateY(-120%);
    transition: transform 0.25s ease;
    margin-left: 0;
  }
  .nav__links.is-open { transform: translateY(0); }
  .nav__search { margin-top: 0.4rem; }
  .nav__search input, .nav__search { width: 100%; }
  .nav__icon { width: auto; padding: 0 0.9rem; height: 40px; justify-content: flex-start; }
  .grades { grid-template-columns: repeat(2, 1fr); }
  .hero { padding: 1.5rem 1.4rem; }
  .detail-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}