/* ============================================================
   SPL — Théorie vol à voile · Editorial Swiss aviation design
   Default theme: Iris (white / blue-violet / bronze)
   ============================================================ */

:root {
  /* Iris — default */
  --bg:        #ffffff;
  --bg-deep:   #f3f2f8;
  --surface:   #ffffff;
  --surface-2: #f5f3fb;
  --ink:       #161255;
  --ink-2:     #3b2f8a;
  --muted:     #6f6a8e;
  --rule:      rgba(22, 18, 85, 0.13);
  --rule-strong: rgba(22, 18, 85, 0.30);
  --accent:    #b87333;
  --accent-ink:#ffffff;
  --ok:        #2f6b6a;
  --ko:        #a8344f;
  --warn:      #8a6a14;
  --banner-bg: #161255;
  --banner-fg: #f5f3fb;
  --banner-fg-soft: rgba(245, 243, 251, 0.72);
  --banner-fg-dim: rgba(245, 243, 251, 0.46);
  --banner-rule: rgba(245, 243, 251, 0.18);
}

[data-theme="paper"] {
  --bg:        #ebe6d7;
  --bg-deep:   #e3ddca;
  --surface:   #f4efe1;
  --surface-2: #ede7d4;
  --ink:       #14181f;
  --ink-2:     #2b3038;
  --muted:     #6d7079;
  --rule:      rgba(20, 24, 31, 0.14);
  --rule-strong: rgba(20, 24, 31, 0.32);
  --accent:    #c4441f;
  --accent-ink:#ffffff;
  --ok:        #2f6f3d;
  --ko:        #b53326;
  --warn:      #9a6a13;
  --banner-bg: #14181f;
  --banner-fg: #f4efe1;
  --banner-fg-soft: rgba(244, 239, 225, 0.7);
  --banner-fg-dim: rgba(244, 239, 225, 0.5);
  --banner-rule: rgba(244, 239, 225, 0.18);
}

[data-theme="midnight"] {
  --bg:        #0d1117;
  --bg-deep:   #080b10;
  --surface:   #131922;
  --surface-2: #1a2230;
  --ink:       #ece7d6;
  --ink-2:     #c8c3b3;
  --muted:     #8b8f98;
  --rule:      rgba(236, 231, 214, 0.13);
  --rule-strong: rgba(236, 231, 214, 0.32);
  --accent:    #ff8a3d;
  --accent-ink:#0d1117;
  --ok:        #6dd28a;
  --ko:        #ff7a72;
  --warn:      #f0b03a;
  --banner-bg: #ece7d6;
  --banner-fg: #14181f;
  --banner-fg-soft: rgba(20, 24, 31, 0.68);
  --banner-fg-dim: rgba(20, 24, 31, 0.42);
  --banner-rule: rgba(20, 24, 31, 0.18);
}

[data-theme="topo"] {
  --bg:        #e6e1d0;
  --bg-deep:   #ddd6c1;
  --surface:   #f0ecdc;
  --surface-2: #e8e2cf;
  --ink:       #15293c;
  --ink-2:     #2a405a;
  --muted:     #5e6c80;
  --rule:      rgba(21, 41, 60, 0.16);
  --rule-strong: rgba(21, 41, 60, 0.36);
  --accent:    #b7501c;
  --accent-ink:#ffffff;
  --ok:        #2e6749;
  --ko:        #a93521;
  --warn:      #976912;
  --banner-bg: #15293c;
  --banner-fg: #f0ecdc;
  --banner-fg-soft: rgba(240, 236, 220, 0.7);
  --banner-fg-dim: rgba(240, 236, 220, 0.45);
  --banner-rule: rgba(240, 236, 220, 0.18);
}

/* ============================================================
   Reset
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  background: var(--bg);
  color: var(--ink);
  font-family: 'Geist', -apple-system, BlinkMacSystemFont, sans-serif;
  font-feature-settings: 'ss01' on, 'cv11' on;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
input, select, textarea { font: inherit; color: inherit; }
img { max-width: 100%; height: auto; display: block; }

::selection { background: var(--accent); color: var(--accent-ink); }

/* ============================================================
   Type system
   ============================================================ */
.serif    { font-family: 'Fraunces', Georgia, serif; font-style: italic; }
.mono     { font-family: 'Geist Mono', ui-monospace, monospace; }
.eyebrow  { font-family: 'Geist Mono', ui-monospace, monospace; text-transform: uppercase; letter-spacing: 0.14em; font-size: 11px; font-weight: 500; color: var(--muted); }
.eyebrow-ink { color: var(--ink-2); }
.num      { font-family: 'Geist Mono', ui-monospace, monospace; font-variant-numeric: tabular-nums; font-feature-settings: 'tnum' on; }

.display {
  font-family: 'Geist', sans-serif;
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 0.96;
}

.h-xxl { font-size: clamp(56px, 9vw, 132px); }
.h-xl  { font-size: clamp(40px, 5.6vw, 72px); letter-spacing: -0.028em; line-height: 1.02; font-weight: 600; }
.h-lg  { font-size: clamp(28px, 3.2vw, 40px); letter-spacing: -0.022em; line-height: 1.08; font-weight: 600; }
.h-md  { font-size: 22px; letter-spacing: -0.012em; font-weight: 600; line-height: 1.2; }
.h-sm  { font-size: 17px; font-weight: 600; letter-spacing: -0.005em; }

.lead  { font-size: 19px; line-height: 1.5; color: var(--ink-2); font-weight: 400; }
.body  { font-size: 15px; line-height: 1.55; color: var(--ink-2); }
.small { font-size: 13px; color: var(--muted); line-height: 1.5; }
.tiny  { font-size: 11px; color: var(--muted); letter-spacing: 0.02em; }

.serif-em { font-family: 'Fraunces', Georgia, serif; font-style: italic; font-weight: 400; color: var(--accent); letter-spacing: -0.02em; }

/* ============================================================
   Layout primitives
   ============================================================ */
.app { min-height: 100vh; display: flex; flex-direction: column; }
.shell { width: 100%; max-width: 1320px; margin: 0 auto; padding: 0 32px; }
.shell--narrow { max-width: 1000px; }

.hidden { display: none !important; }

.rule { height: 1px; width: 100%; background: var(--rule); }
.rule-strong { height: 1px; width: 100%; background: var(--rule-strong); }
.hairline-top    { border-top: 1px solid var(--rule); }
.hairline-bottom { border-bottom: 1px solid var(--rule); }
.hairline-all    { border: 1px solid var(--rule); }
.cluster { display: flex; align-items: center; gap: 16px; }
.cluster-sm { display: flex; align-items: center; gap: 8px; }
.cluster-tight { display: flex; align-items: center; gap: 4px; }
.stack { display: flex; flex-direction: column; }

/* ============================================================
   Top bar
   ============================================================ */
.topbar {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--rule);
}
.topbar__inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  height: 64px;
  gap: 24px;
}
.brand {
  display: inline-flex; align-items: baseline; gap: 10px;
  font-family: 'Geist Mono', ui-monospace, monospace;
  font-weight: 600; font-size: 14px; letter-spacing: 0.04em;
  text-transform: uppercase;
}
.brand__mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 28px; height: 28px;
  background: var(--ink); color: var(--bg);
  border-radius: 6px;
  align-self: center; transform: translateY(2px);
}
.brand__mark svg { display: block; width: 20px; height: 20px; }
.brand__sep { color: var(--muted); font-weight: 400; }
.brand__sub { color: var(--muted); font-weight: 400; text-transform: none; letter-spacing: 0; font-family: 'Geist', sans-serif; font-size: 13px; }

.navlinks { display: flex; gap: 4px; justify-content: center; }
.navlinks a, .navlinks button {
  padding: 6px 14px;
  font-family: 'Geist Mono', ui-monospace, monospace;
  font-size: 11px; font-weight: 500;
  text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--muted); border-radius: 999px;
  transition: color .15s, background .15s;
  position: relative;
}
.navlinks a:hover, .navlinks button:hover { color: var(--ink); }
.navlinks a.is-active, .navlinks button.is-active {
  color: var(--ink);
  background: var(--surface-2);
  box-shadow: inset 0 0 0 1px var(--rule);
}
.navlinks .dot {
  display: inline-block; width: 4px; height: 4px;
  background: var(--accent); border-radius: 50%;
  margin-right: 6px; transform: translateY(-1px); opacity: 0;
}
.navlinks .is-active .dot { opacity: 1; }

.topbar__right { display: flex; align-items: center; gap: 10px; justify-self: end; }
.topbar__right .time { font-family: 'Geist Mono', ui-monospace, monospace; font-size: 11px; color: var(--muted); letter-spacing: 0.04em; }
.icon-btn {
  width: 32px; height: 32px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 999px; color: var(--muted); font-size: 14px;
}
.icon-btn:hover { background: var(--surface-2); color: var(--ink); }

/* ============================================================
   Hero
   ============================================================ */
.hero { padding-block: 80px 64px; position: relative; }
.hero__meta {
  display: flex; justify-content: space-between; align-items: baseline;
  margin-bottom: 28px; flex-wrap: wrap; gap: 12px;
}
.hero__title { margin-bottom: 24px; max-width: 14ch; }
.hero__title em {
  font-family: 'Fraunces', Georgia, serif;
  font-style: italic; font-weight: 400;
  color: var(--accent); letter-spacing: -0.02em;
}
.hero__sub { max-width: 52ch; margin-bottom: 56px; }

.cluster-strip {
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--rule-strong);
  border-bottom: 1px solid var(--rule);
}
.cluster-strip__cell {
  padding: 22px 24px 22px 0;
  border-right: 1px solid var(--rule);
  display: flex; flex-direction: column; gap: 8px;
}
.cluster-strip__cell:last-child { border-right: 0; padding-right: 0; }
.cluster-strip__cell:not(:first-child) { padding-left: 24px; }
.cluster-strip__label { font-family: 'Geist Mono', monospace; font-size: 11px; text-transform: uppercase; color: var(--muted); letter-spacing: 0.14em; }
.cluster-strip__value {
  font-family: 'Geist', sans-serif;
  font-size: clamp(34px, 4.8vw, 56px);
  font-weight: 500; letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  line-height: 1; display: flex; align-items: baseline; gap: 6px;
}
.cluster-strip__value .unit { font-size: 14px; color: var(--muted); font-weight: 400; letter-spacing: 0; }

@media (max-width: 840px) {
  .cluster-strip { grid-template-columns: repeat(2, 1fr); }
  .cluster-strip__cell:nth-child(2) { border-right: 0; padding-right: 0; }
  .cluster-strip__cell:nth-child(3) { border-top: 1px solid var(--rule); }
  .cluster-strip__cell:nth-child(4) { border-top: 1px solid var(--rule); }
}

/* Horizon ornament */
.horizon { display: flex; align-items: center; gap: 16px; margin: 0 0 28px; }
.horizon__line { flex: 1; height: 1px; background: var(--rule); }
.horizon__label { font-family: 'Geist Mono', monospace; font-size: 11px; text-transform: uppercase; letter-spacing: 0.16em; color: var(--muted); }
.horizon__tick { width: 10px; height: 10px; border: 1px solid var(--ink); border-radius: 50%; }

/* ============================================================
   Matières grid
   ============================================================ */
.matieres {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 0;
  border-top: 1px solid var(--rule); border-left: 1px solid var(--rule);
}
@media (max-width: 980px) { .matieres { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .matieres { grid-template-columns: 1fr; } }

.matiere {
  background: var(--bg);
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 28px 28px 24px;
  cursor: pointer; position: relative;
  display: flex; flex-direction: column; gap: 14px;
  text-align: left; transition: background .2s ease;
  min-height: 240px; overflow: hidden;
  color: var(--ink);
}
.matiere:hover { background: var(--surface-2); }
.matiere::before {
  content: ''; position: absolute; inset: 0;
  border-left: 3px solid transparent;
  pointer-events: none; transition: border-color .25s ease;
}
.matiere:hover::before { border-left-color: var(--accent); }

.matiere__head {
  display: flex; align-items: baseline; justify-content: space-between; gap: 12px;
}
.matiere__code { font-family: 'Geist Mono', monospace; font-size: 11px; font-weight: 500; color: var(--muted); letter-spacing: 0.14em; }
.matiere__nshort { font-family: 'Geist Mono', monospace; font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.1em; }
.matiere__big {
  font-family: 'Geist', sans-serif;
  font-weight: 500; font-size: 92px;
  line-height: 0.86; letter-spacing: -0.05em;
  font-variant-numeric: tabular-nums; color: var(--ink);
}
.matiere__name { font-family: 'Geist', sans-serif; font-weight: 500; font-size: 19px; letter-spacing: -0.012em; line-height: 1.2; margin-top: 4px; }
.matiere__desc { font-size: 13px; color: var(--muted); line-height: 1.5; margin-top: auto; }
.matiere__foot {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 10px; padding-top: 12px; border-top: 1px solid var(--rule);
  font-family: 'Geist Mono', monospace; font-size: 11px;
  letter-spacing: 0.08em; text-transform: uppercase;
}
.matiere__progress { display: flex; align-items: center; gap: 8px; color: var(--muted); }
.matiere__bar { width: 60px; height: 2px; background: var(--rule); position: relative; overflow: hidden; }
.matiere__bar > div { position: absolute; inset: 0; background: var(--accent); transform-origin: left; }
.matiere__cta { display: inline-flex; align-items: center; gap: 6px; color: var(--ink); font-weight: 500; }
.matiere:hover .matiere__cta { color: var(--accent); }

/* ============================================================
   Section heads
   ============================================================ */
.section { padding-block: 72px 56px; }
.section--tight { padding-block: 40px; }
.section__head {
  display: flex; align-items: flex-end; justify-content: space-between;
  margin-bottom: 36px; gap: 24px; flex-wrap: wrap;
}
.section__head h2 { font-family: 'Geist', sans-serif; font-weight: 600; letter-spacing: -0.022em; font-size: clamp(28px, 3.4vw, 44px); line-height: 1.04; max-width: 18ch; }
.section__head .col-right { text-align: right; max-width: 36ch; }

/* ============================================================
   Banner (exam CTA)
   ============================================================ */
.banner {
  background: var(--banner-bg);
  color: var(--banner-fg);
  padding: 56px 48px;
  display: grid; grid-template-columns: 1.4fr 1fr;
  gap: 48px; align-items: end;
  position: relative; overflow: hidden;
}
.banner__eyebrow { color: var(--banner-fg-soft); font-family: 'Geist Mono', monospace; font-size: 11px; text-transform: uppercase; letter-spacing: 0.14em; margin-bottom: 20px; }
.banner__title {
  font-family: 'Geist', sans-serif; font-weight: 500;
  font-size: clamp(36px, 5vw, 64px);
  letter-spacing: -0.028em; line-height: 1.02;
  max-width: 18ch; margin-bottom: 12px;
}
.banner__title em { color: var(--accent); font-family: 'Fraunces', serif; font-style: italic; font-weight: 400; }
.banner__sub { color: var(--banner-fg-soft); font-size: 16px; line-height: 1.5; margin-bottom: 28px; max-width: 44ch; }
.banner__meta { border-left: 1px solid var(--banner-rule); padding-left: 32px; display: flex; flex-direction: column; gap: 20px; }
.banner__meta-row { display: flex; justify-content: space-between; gap: 24px; align-items: baseline; padding-bottom: 12px; border-bottom: 1px solid var(--banner-rule); }
.banner__meta-row:last-child { border-bottom: 0; padding-bottom: 0; }
.banner__meta-label { font-family: 'Geist Mono', monospace; font-size: 11px; text-transform: uppercase; letter-spacing: 0.14em; color: var(--banner-fg-dim); }
.banner__meta-value { font-family: 'Geist Mono', monospace; font-size: 15px; font-weight: 500; }

@media (max-width: 820px) {
  .banner { grid-template-columns: 1fr; padding: 36px 28px; gap: 28px; }
  .banner__meta { border-left: 0; border-top: 1px solid var(--banner-rule); padding-left: 0; padding-top: 24px; }
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 22px; font-family: 'Geist Mono', monospace;
  font-size: 12px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.1em;
  border-radius: 999px; cursor: pointer;
  transition: transform .12s, background .18s, color .18s, border-color .18s;
  border: 1px solid transparent; white-space: nowrap;
  text-decoration: none;
}
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--accent); color: var(--accent-ink); }
.btn--primary:hover { background: color-mix(in srgb, var(--accent) 88%, black); }
.btn--ink { background: var(--ink); color: var(--bg); }
.btn--ink:hover { background: var(--ink-2); }
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--rule-strong); }
.btn--ghost:hover { border-color: var(--ink); background: var(--surface-2); }
.btn--inverse { background: var(--bg); color: var(--ink); }
.btn--inverse:hover { background: color-mix(in srgb, var(--bg) 90%, black); }
.btn--sm { padding: 9px 14px; font-size: 11px; }
.btn--lg { padding: 16px 28px; font-size: 13px; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }

.linklike {
  background: none; border: 0; padding: 0;
  font: inherit; color: var(--ink); cursor: pointer;
  text-decoration: underline;
  text-decoration-color: var(--rule-strong);
  text-underline-offset: 4px;
}
.linklike:hover { text-decoration-color: var(--accent); color: var(--accent); }

/* ============================================================
   Colophon
   ============================================================ */
.colophon {
  border-top: 1px solid var(--rule);
  padding: 48px 0 64px;
  display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 40px;
}
.colophon h4 { font-family: 'Geist Mono', monospace; font-size: 11px; text-transform: uppercase; letter-spacing: 0.14em; color: var(--muted); margin-bottom: 16px; font-weight: 500; }
.colophon p, .colophon li { font-size: 14px; color: var(--ink-2); line-height: 1.55; }
.colophon ul { list-style: none; }
.colophon ul li { padding: 4px 0; }
.colophon a { text-decoration: underline; text-decoration-color: var(--rule-strong); text-underline-offset: 3px; }
.colophon a:hover { text-decoration-color: var(--accent); color: var(--accent); }
@media (max-width: 820px) { .colophon { grid-template-columns: 1fr 1fr; } }

/* ============================================================
   Quiz
   ============================================================ */
.quiz { padding-block: 40px 80px; }
.quiz__context {
  display: grid; grid-template-columns: 1fr auto auto;
  align-items: center; gap: 24px;
  padding: 22px 0; border-bottom: 1px solid var(--rule);
  margin-bottom: 56px;
}
.quiz__ctx-id { display: flex; align-items: baseline; gap: 14px; }
.quiz__ctx-id .big {
  font-family: 'Geist', sans-serif; font-weight: 500;
  font-size: 44px; line-height: 1;
  letter-spacing: -0.03em; font-variant-numeric: tabular-nums;
}
.quiz__ctx-meta { font-family: 'Geist', sans-serif; font-size: 15px; color: var(--muted); }
.quiz__ctx-meta strong { color: var(--ink); font-weight: 500; }
.quiz__progress { display: flex; align-items: center; gap: 14px; }
.quiz__progress .bar { width: 200px; height: 2px; background: var(--rule); position: relative; overflow: hidden; }
.quiz__progress .bar > div { position: absolute; inset: 0 auto 0 0; background: var(--accent); transform-origin: left; }
.quiz__progress .txt { font-family: 'Geist Mono', monospace; font-size: 12px; color: var(--muted); letter-spacing: 0.06em; }

.question { max-width: 880px; margin: 0 auto; padding: 24px 0; }
.question__meta { display: flex; gap: 12px; margin-bottom: 28px; align-items: center; flex-wrap: wrap; }
.tag {
  display: inline-flex; align-items: center;
  font-family: 'Geist Mono', monospace;
  font-size: 11px; letter-spacing: 0.1em;
  text-transform: uppercase; padding: 5px 10px;
  border: 1px solid var(--rule-strong);
  border-radius: 999px; color: var(--ink-2);
}
.tag--accent { border-color: var(--accent); color: var(--accent); }
.tag--ok { border-color: var(--ok); color: var(--ok); }
.tag--ko { border-color: var(--ko); color: var(--ko); }
.tag--warn { border-color: var(--warn); color: var(--warn); }

.question__text {
  font-family: 'Geist', sans-serif; font-weight: 500;
  font-size: clamp(24px, 3.2vw, 36px);
  letter-spacing: -0.018em; line-height: 1.18;
  margin-bottom: 28px; text-wrap: balance;
}

.q-images {
  display: flex; flex-wrap: wrap; gap: 12px;
  margin: 0 0 28px;
}
.q-images:empty { display: none; }
.q-images img {
  max-width: 100%; max-height: 360px;
  border: 1px solid var(--rule);
  border-radius: 4px; background: #ffffff;
  padding: 6px; cursor: zoom-in;
  transition: border-color .15s;
}
.q-images img:hover { border-color: var(--ink); }
.question-figure { margin: 0; max-width: 100%; }
.question-figure figcaption { max-width: 760px; margin-top: 6px; font-size: 11px; line-height: 1.5; color: var(--muted); }
.question-figure figcaption a { text-decoration: underline; }
.image-expand { display: block; padding: 0; border: 0; background: none; cursor: zoom-in; max-width: 100%; }
.image-expand img { display: block; }
#illustration-dialog { border: 1px solid var(--rule); border-radius: 4px; padding: 16px; max-width: 96vw; max-height: 94vh; }
#illustration-dialog::backdrop { background: #15202b99; }
#illustration-dialog form { display: flex; justify-content: flex-end; margin: 0 0 12px; }
.illustration-scroll { max-width: 90vw; max-height: 78vh; overflow: auto; }
.illustration-scroll img { display: block; width: 960px; max-width: none; height: auto; }

.choices { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.choice {
  display: grid; grid-template-columns: auto 1fr auto;
  align-items: center; gap: 18px;
  padding: 18px 22px;
  border: 1px solid var(--rule);
  background: var(--surface);
  border-radius: 4px; cursor: pointer;
  transition: background .15s, border-color .15s, transform .1s;
  text-align: left; width: 100%;
  color: var(--ink);
}
.choice:hover { border-color: var(--ink); background: var(--surface-2); }
.choice__letter {
  width: 30px; height: 30px;
  border: 1px solid var(--rule-strong);
  border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  font-family: 'Geist Mono', monospace;
  font-size: 12px; font-weight: 600;
  color: var(--ink); flex-shrink: 0;
}
.choice__text { font-size: 16px; line-height: 1.45; color: var(--ink); }
.choice__hint { font-family: 'Geist Mono', monospace; font-size: 10px; color: var(--muted); letter-spacing: 0.08em; text-transform: uppercase; }
.choice.is-selected { border-color: var(--ink); background: var(--surface-2); }
.choice.is-selected .choice__letter { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.choice.is-correct { border-color: var(--ok); background: color-mix(in srgb, var(--ok) 10%, var(--surface)); }
.choice.is-correct .choice__letter { background: var(--ok); color: white; border-color: var(--ok); }
.choice.is-wrong { border-color: var(--ko); background: color-mix(in srgb, var(--ko) 10%, var(--surface)); }
.choice.is-wrong .choice__letter { background: var(--ko); color: white; border-color: var(--ko); }
.choice:disabled { cursor: default; }

.feedback {
  margin-top: 24px; padding: 20px 22px;
  border-left: 3px solid;
  background: var(--surface-2);
}
.feedback--ok { border-color: var(--ok); }
.feedback--ko { border-color: var(--ko); }
.feedback__head {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 8px;
  font-family: 'Geist Mono', monospace;
  font-size: 12px; letter-spacing: 0.1em;
  text-transform: uppercase; font-weight: 600;
}
.feedback--ok .feedback__head { color: var(--ok); }
.feedback--ko .feedback__head { color: var(--ko); }
.feedback__body { font-size: 15px; color: var(--ink-2); line-height: 1.55; }
.question-sources { margin-top: 12px; font-size: 13px; line-height: 1.5; }
.question-sources > span { font-weight: 600; }
.question-sources ul { margin: 4px 0 0; padding-left: 20px; }
.question-sources a { text-decoration: underline; overflow-wrap: anywhere; }
.question-sources .source-note { color: var(--muted); }
.review-explanation { margin-top: 12px; color: var(--ink-2); }

.question__actions {
  margin-top: 40px; padding-top: 28px;
  border-top: 1px solid var(--rule);
  display: flex; justify-content: space-between;
  gap: 12px; align-items: center; flex-wrap: wrap;
}
.question__actions .left, .question__actions .right { display: flex; gap: 8px; flex-wrap: wrap; }

.session-bar {
  margin-top: 56px; padding: 16px 0;
  border-top: 1px solid var(--rule);
  display: flex; justify-content: space-between; gap: 18px;
  font-family: 'Geist Mono', monospace;
  font-size: 12px; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--muted);
  flex-wrap: wrap;
}
.session-bar strong { color: var(--ink); font-weight: 500; }

/* ============================================================
   Exam setup
   ============================================================ */
.exam-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 0;
  border-top: 1px solid var(--rule); border-left: 1px solid var(--rule);
  margin-bottom: 32px;
}
@media (max-width: 980px) { .exam-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .exam-grid { grid-template-columns: 1fr; } }

.exam-card {
  padding: 24px 24px 22px;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  background: var(--bg); cursor: pointer;
  display: flex; flex-direction: column; gap: 12px;
  transition: background .18s; text-align: left;
  min-height: 180px; position: relative;
  color: var(--ink);
}
.exam-card:hover { background: var(--surface-2); }
.exam-card::after {
  content: '→'; position: absolute;
  top: 24px; right: 24px;
  font-size: 16px; color: var(--muted);
  transition: color .18s, transform .2s;
}
.exam-card:hover::after { color: var(--accent); transform: translateX(4px); }
.exam-card__head { display: flex; align-items: baseline; gap: 10px; }
.exam-card__code { font-family: 'Geist Mono', monospace; font-size: 12px; color: var(--muted); letter-spacing: 0.12em; }
.exam-card__name {
  font-family: 'Geist', sans-serif; font-weight: 500;
  font-size: 19px; line-height: 1.2;
  letter-spacing: -0.012em; margin-top: 4px;
  max-width: 18ch;
}
.exam-card__metrics {
  margin-top: auto; padding-top: 16px;
  border-top: 1px dashed var(--rule);
  display: flex; gap: 24px;
}
.exam-card__metric .v {
  font-family: 'Geist Mono', monospace;
  font-size: 22px; font-weight: 500;
  font-variant-numeric: tabular-nums; letter-spacing: -0.01em;
}
.exam-card__metric .k { font-family: 'Geist Mono', monospace; font-size: 10px; text-transform: uppercase; letter-spacing: 0.12em; color: var(--muted); display: block; margin-top: 2px; }

.allexam-banner {
  background: var(--banner-bg); color: var(--banner-fg);
  padding: 36px 40px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 32px; flex-wrap: wrap; margin-bottom: 32px;
}
.allexam-banner h3 {
  font-family: 'Geist', sans-serif; font-weight: 500;
  font-size: clamp(22px, 2.6vw, 32px);
  letter-spacing: -0.018em; line-height: 1.15;
  max-width: 22ch;
}
.allexam-banner h3 em { color: var(--accent); font-family: 'Fraunces', serif; font-style: italic; font-weight: 400; }
.allexam-banner__metrics { display: flex; gap: 24px; align-items: center; }
.allexam-banner__metric { text-align: right; }
.allexam-banner__metric .v { font-family: 'Geist Mono', monospace; font-size: 28px; font-weight: 500; font-variant-numeric: tabular-nums; }
.allexam-banner__metric .k { font-family: 'Geist Mono', monospace; font-size: 10px; text-transform: uppercase; letter-spacing: 0.12em; color: var(--banner-fg-dim); display: block; margin-top: 2px; }

/* ============================================================
   Exam running
   ============================================================ */
.exam-running { padding-block: 32px 60px; }
.exam-bar {
  display: grid; grid-template-columns: auto 1fr auto;
  align-items: center; gap: 32px;
  padding: 20px 0;
  border-top: 1px solid var(--rule-strong);
  border-bottom: 1px solid var(--rule);
  margin-bottom: 48px;
}
.exam-bar__timer { display: flex; align-items: baseline; gap: 14px; }
.exam-bar__timer .label { font-family: 'Geist Mono', monospace; font-size: 11px; text-transform: uppercase; letter-spacing: 0.14em; color: var(--muted); }
.exam-bar__timer .v {
  font-family: 'Geist Mono', monospace;
  font-size: 44px; font-weight: 500;
  letter-spacing: -0.01em; font-variant-numeric: tabular-nums;
  line-height: 1;
}
.exam-bar__timer.is-warn .v { color: var(--warn); }
.exam-bar__timer.is-danger .v { color: var(--ko); animation: blink 1.1s infinite; }
@keyframes blink { 50% { opacity: 0.5; } }

.exam-bar__progress { display: flex; flex-direction: column; gap: 6px; }
.exam-bar__progress .lbl { font-family: 'Geist Mono', monospace; font-size: 11px; text-transform: uppercase; letter-spacing: 0.14em; color: var(--muted); }
.exam-bar__pips {
  display: grid; grid-auto-flow: column;
  grid-auto-columns: 1fr; gap: 3px; height: 8px;
}
.exam-bar__pip { background: var(--rule); border-radius: 1px; cursor: pointer; }
.exam-bar__pip.answered { background: var(--ink); }
.exam-bar__pip.current { background: var(--accent); }

/* ============================================================
   Exam results
   ============================================================ */
.results { padding-block: 40px 80px; }
.results__score {
  display: grid; grid-template-columns: 1fr auto;
  gap: 32px; align-items: end;
  padding: 48px 0;
  border-top: 1px solid var(--rule-strong);
  border-bottom: 1px solid var(--rule);
  margin-bottom: 48px;
}
.results__big {
  font-family: 'Geist', sans-serif; font-weight: 500;
  font-size: clamp(72px, 14vw, 200px);
  line-height: 0.85; letter-spacing: -0.045em;
  font-variant-numeric: tabular-nums;
  display: flex; align-items: baseline; gap: 0;
}
.results__big .unit { font-size: 32%; color: var(--muted); font-weight: 400; letter-spacing: 0; }
.results__stamp {
  border: 3px solid; border-radius: 6px;
  padding: 18px 32px;
  font-family: 'Geist Mono', monospace;
  font-size: 24px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.16em;
  transform: rotate(-3deg); align-self: center;
  white-space: nowrap;
}
.results__stamp.pass { border-color: var(--ok); color: var(--ok); }
.results__stamp.fail { border-color: var(--ko); color: var(--ko); }

.results__breakdown { display: flex; flex-direction: column; gap: 8px; margin-bottom: 56px; }
.breakdown-row {
  display: grid;
  grid-template-columns: 70px 1fr 200px 80px;
  align-items: center; gap: 18px;
  padding: 14px 0;
  border-bottom: 1px solid var(--rule);
}
.breakdown-row .code { font-family: 'Geist Mono', monospace; font-size: 12px; color: var(--muted); }
.breakdown-row .name { font-family: 'Geist', sans-serif; font-weight: 500; }
.breakdown-row .name .small { display: block; margin-top: 2px; }
.breakdown-row .barwrap {
  height: 6px; background: var(--rule);
  position: relative; overflow: hidden;
}
.breakdown-row .barwrap > div { position: absolute; inset: 0 auto 0 0; transform-origin: left; }
.breakdown-row.pass .barwrap > div { background: var(--ok); }
.breakdown-row.fail .barwrap > div { background: var(--ko); }
.breakdown-row .pct {
  font-family: 'Geist Mono', monospace;
  font-size: 18px; font-weight: 500;
  text-align: right; font-variant-numeric: tabular-nums;
}
.breakdown-row.pass .pct { color: var(--ok); }
.breakdown-row.fail .pct { color: var(--ko); }

.review-list { display: flex; flex-direction: column; gap: 6px; }
.review-item {
  display: grid; grid-template-columns: auto 1fr auto;
  gap: 16px; padding: 16px 18px;
  background: var(--surface-2);
  border-left: 2px solid; align-items: start;
}
.review-item.ok { border-color: var(--ok); }
.review-item.ko { border-color: var(--ko); }
.review-item__idx { font-family: 'Geist Mono', monospace; font-size: 14px; font-weight: 500; color: var(--muted); }
.review-item__q { font-size: 14px; line-height: 1.5; }
.review-item__q .ans { display: block; margin-top: 6px; font-size: 12px; color: var(--muted); font-family: 'Geist Mono', monospace; }
.review-item__q .ans strong { color: var(--ink); font-weight: 500; }

/* ============================================================
   Stats
   ============================================================ */
.stats__overview {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
  border-top: 1px solid var(--rule-strong);
  border-bottom: 1px solid var(--rule);
  margin: 24px 0 56px;
}
@media (max-width: 840px) { .stats__overview { grid-template-columns: repeat(2, 1fr); } }
.stats__cell { padding: 28px 28px 28px 0; border-right: 1px solid var(--rule); }
.stats__cell:last-child { border-right: 0; }
.stats__cell:not(:first-child) { padding-left: 28px; }
.stats__cell .k { font-family: 'Geist Mono', monospace; font-size: 11px; text-transform: uppercase; letter-spacing: 0.14em; color: var(--muted); margin-bottom: 14px; }
.stats__cell .v {
  font-family: 'Geist', sans-serif; font-weight: 500;
  font-size: clamp(36px, 5vw, 60px);
  line-height: 1; letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  display: flex; align-items: baseline; gap: 6px;
}
.stats__cell .v .unit { font-size: 15px; color: var(--muted); font-weight: 400; }
.stats__cell .delta { font-family: 'Geist Mono', monospace; font-size: 11px; color: var(--muted); margin-top: 10px; }
.stats__cell .delta.up { color: var(--ok); }

.stats__rows { display: flex; flex-direction: column; }
.stats-row {
  display: grid;
  grid-template-columns: 60px 1fr 200px 80px 80px;
  align-items: center; gap: 24px;
  padding: 18px 0; border-bottom: 1px solid var(--rule);
  cursor: pointer; color: var(--ink);
}
.stats-row:first-child { border-top: 1px solid var(--rule); }
.stats-row:hover { background: var(--surface-2); }
.stats-row .code { font-family: 'Geist Mono', monospace; font-size: 12px; color: var(--muted); letter-spacing: 0.06em; }
.stats-row .name { font-family: 'Geist', sans-serif; font-weight: 500; font-size: 16px; }
.stats-row .name .small { display: block; color: var(--muted); margin-top: 2px; font-size: 12px; }
.stats-row .bar { height: 4px; background: var(--rule); position: relative; }
.stats-row .bar > div { position: absolute; inset: 0 auto 0 0; background: var(--accent); }
.stats-row .ratio { font-family: 'Geist Mono', monospace; font-size: 13px; color: var(--muted); text-align: right; font-variant-numeric: tabular-nums; }
.stats-row .pct { font-family: 'Geist Mono', monospace; font-size: 18px; font-weight: 500; text-align: right; font-variant-numeric: tabular-nums; }

@media (max-width: 820px) {
  .stats-row { grid-template-columns: 50px 1fr 60px; }
  .stats-row .bar, .stats-row .ratio { display: none; }
}

/* ============================================================
   Empty / misc
   ============================================================ */
.empty {
  padding: 80px 24px; text-align: center;
  border: 1px dashed var(--rule-strong);
  border-radius: 6px;
}
.empty h3 { margin-bottom: 8px; }
.empty p { color: var(--muted); }

.divider-label { display: flex; align-items: center; gap: 12px; margin: 48px 0 28px; }
.divider-label .line { flex: 1; height: 1px; background: var(--rule); }
.divider-label .lbl { font-family: 'Geist Mono', monospace; font-size: 11px; text-transform: uppercase; letter-spacing: 0.14em; color: var(--muted); }

/* Loading */
.loading {
  display: flex; align-items: center; justify-content: center;
  gap: 14px; padding: 120px 24px; color: var(--muted);
}
.loading .dot { width: 8px; height: 8px; background: var(--accent); border-radius: 50%; animation: pulse 1.4s ease-in-out infinite; }
.loading .dot:nth-child(2) { animation-delay: 0.2s; }
.loading .dot:nth-child(3) { animation-delay: 0.4s; }
@keyframes pulse { 0%, 80%, 100% { opacity: 0.2; } 40% { opacity: 1; } }

/* ============================================================
   Form: custom exam
   ============================================================ */
details.custom-exam {
  margin-top: 32px;
  border-top: 1px solid var(--rule);
  padding-top: 32px;
}
details.custom-exam > summary {
  cursor: pointer; list-style: none;
  font-family: 'Geist Mono', monospace;
  font-size: 12px; text-transform: uppercase;
  letter-spacing: 0.12em; color: var(--ink);
  display: inline-flex; align-items: center; gap: 10px;
}
details.custom-exam > summary::-webkit-details-marker { display: none; }
details.custom-exam > summary::before { content: '+'; font-size: 16px; color: var(--accent); }
details.custom-exam[open] > summary::before { content: '−'; }

.custom-form { margin-top: 28px; display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
@media (max-width: 720px) { .custom-form { grid-template-columns: 1fr; } }
.field { display: flex; flex-direction: column; gap: 8px; }
.field label { font-family: 'Geist Mono', monospace; font-size: 11px; text-transform: uppercase; letter-spacing: 0.12em; color: var(--muted); }
.field input[type="number"] {
  padding: 12px 14px; background: var(--surface);
  border: 1px solid var(--rule-strong); border-radius: 4px;
  font-family: 'Geist Mono', monospace; font-size: 16px;
  font-weight: 500; color: var(--ink);
}
.field input[type="number"]:focus { outline: 0; border-color: var(--ink); }

.matiere-picker {
  grid-column: 1 / -1;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px;
}
@media (max-width: 720px) { .matiere-picker { grid-template-columns: 1fr 1fr; } }
.matiere-picker label {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 14px;
  border: 1px solid var(--rule); background: var(--surface);
  border-radius: 4px; cursor: pointer;
  font-size: 13px; font-family: 'Geist', sans-serif; color: var(--ink);
}
.matiere-picker label:has(input:checked) { border-color: var(--ink); background: var(--surface-2); }
.matiere-picker input { accent-color: var(--accent); }
.matiere-picker .mp-code { font-family: 'Geist Mono', monospace; font-size: 11px; color: var(--muted); margin-right: 4px; }

.custom-form-foot {
  grid-column: 1 / -1;
  display: flex; gap: 8px; margin-top: 8px; align-items: center;
  flex-wrap: wrap;
}
.custom-form-foot .spacer { flex: 1; }