/* PASS Médecine — Chimie : feuille de style */

:root {
  --bg: #f5f4fb;
  --dot: #d9d5ee;
  --card: #ffffff;
  --line: #e1ddf0;
  --line-strong: #c9c2e6;
  --ink: #1b1733;
  --ink-soft: #4d4868;
  --muted: #6e6989;

  --primary: #4b32c3;        /* violet scientifique */
  --primary-2: #2f5fd0;      /* bleu */
  --primary-soft: #ece8fc;
  --primary-ink: #3a2699;

  --good: #17804f;
  --good-soft: #e3f5ec;
  --bad: #c2530f;            /* accent erreurs / alertes */
  --bad-soft: #fdeee3;
  --streak: #d6246e;         /* série en cours */

  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 1px 2px rgba(27, 23, 51, .04), 0 6px 20px rgba(27, 23, 51, .05);
  --font-title: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  --font-text: "DM Sans", "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

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

body {
  margin: 0;
  font-family: var(--font-text);
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
  background-color: var(--bg);
  background-image: radial-gradient(var(--dot) 1px, transparent 1.2px);
  background-size: 22px 22px;
  overflow-x: hidden;
}

h1, h2, h3, h4 { font-family: var(--font-title); line-height: 1.2; margin: 0 0 .5em; }
h2 { font-size: 1.5rem; letter-spacing: -.01em; }
h3 { font-size: 1.15rem; }
p { margin: 0 0 .8em; }
a { color: var(--primary); }
b, strong { font-weight: 700; color: var(--primary-ink); }

.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }

/* ---------- En-tête ---------- */
.site-header { padding-top: 18px; border-bottom: 1px solid var(--line); background: linear-gradient(180deg, rgba(255,255,255,.85), rgba(255,255,255,.55)); }
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.brand { font-family: var(--font-title); font-weight: 700; font-size: .98rem; color: var(--primary-ink); }
.brand-mark { display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 8px; background: var(--primary); color: #fff; margin-right: 4px; font-size: .95rem; }
.top-actions { display: flex; gap: 8px; }
.overline { margin: 34px 0 8px; font-size: .74rem; letter-spacing: .18em; text-transform: uppercase; font-weight: 700; color: var(--primary-2); }
.hero-title { font-size: clamp(2rem, 6vw, 3.4rem); letter-spacing: -.03em; margin-bottom: 14px; }
.hero-title span { color: var(--primary); }
.hero-lead { max-width: 640px; color: var(--ink-soft); font-size: 1.05rem; }
.hero-format { font-size: .88rem; color: var(--muted); border-left: 3px solid var(--primary-2); padding-left: 10px; max-width: 720px; }

.tabs { display: flex; gap: 4px; margin-top: 24px; overflow-x: auto; scrollbar-width: none; -webkit-overflow-scrolling: touch; }
.tabs::-webkit-scrollbar { display: none; }
.tab {
  flex: 0 0 auto; border: 0; background: none; cursor: pointer;
  font: 600 .95rem var(--font-title); color: var(--muted);
  padding: 12px 14px; border-bottom: 3px solid transparent;
}
.tab:hover { color: var(--ink); }
.tab.active { color: var(--primary); border-bottom-color: var(--primary); }

main.wrap { padding-top: 28px; padding-bottom: 40px; outline: none; }
.site-footer { font-size: .8rem; color: var(--muted); padding-bottom: 30px; }

/* ---------- Boutons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  font: 600 .92rem var(--font-text); cursor: pointer;
  border-radius: 999px; padding: 9px 18px;
  border: 1px solid var(--primary); background: var(--primary); color: #fff;
  transition: background .15s, border-color .15s, color .15s;
}
.btn:hover { background: var(--primary-ink); border-color: var(--primary-ink); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn-ghost { background: transparent; color: var(--primary); border-color: var(--line-strong); }
.btn-ghost:hover { background: var(--primary-soft); color: var(--primary-ink); border-color: var(--primary); }
.btn-small { padding: 6px 13px; font-size: .84rem; }
.btn-danger { background: var(--bad); border-color: var(--bad); }
.btn-danger:hover { background: #9e420b; border-color: #9e420b; }
.linkbtn { border: 0; background: none; padding: 0; font: inherit; color: var(--primary); cursor: pointer; text-decoration: underline; text-underline-offset: 2px; text-align: left; }
.linkbtn:hover { color: var(--primary-ink); }
.row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.row.end { justify-content: flex-end; }
.row.between { justify-content: space-between; }

/* ---------- Cartes ---------- */
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); min-width: 0; }
.card + .card { margin-top: 14px; }
.section-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 14px; margin: 34px 0 14px; }
.section-head:first-child { margin-top: 0; }
.section-head h2 { margin: 0; }
.dnum { font: 700 .78rem var(--font-title); color: #fff; background: var(--primary); border-radius: 6px; padding: 2px 8px; }
.weight { font-size: .85rem; color: var(--muted); }
.muted { color: var(--muted); }
.small { font-size: .86rem; }
.intro { color: var(--ink-soft); max-width: 720px; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-bottom: 20px; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; }
.stat .v { font: 700 1.7rem var(--font-title); color: var(--primary); line-height: 1.1; }
.stat .l { font-size: .82rem; color: var(--muted); }
.stat.streak .v { color: var(--streak); }

.bar { height: 10px; background: #ebe8f5; border-radius: 99px; overflow: hidden; }
.bar > span { display: block; height: 100%; background: linear-gradient(90deg, var(--primary), var(--primary-2)); border-radius: 99px; transition: width .4s; }
.bar.good > span { background: var(--good); }
.bar.warn > span { background: var(--bad); }
.bar-line { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 4px 12px; margin: 12px 0; }
.bar-line .bar { grid-column: 1 / -1; }
.bar-line .lbl { font-size: .92rem; min-width: 0; }
.bar-line .val { font: 600 .9rem var(--font-title); }

/* ---------- Pastilles ---------- */
.pill { display: inline-block; font: 600 .74rem var(--font-text); padding: 2px 10px; border-radius: 99px; white-space: nowrap; border: 1px solid transparent; }
.pill.todo { background: #f0eff5; color: var(--muted); border-color: #e1dfea; }
.pill.doing { background: #e6eefc; color: #1f4fae; border-color: #c9d8f6; }
.pill.done { background: var(--good-soft); color: var(--good); border-color: #bfe6d1; }
.pill.read { background: var(--good-soft); color: var(--good); }
.pill.extra { background: var(--bad-soft); color: var(--bad); }
.tag { display: inline-block; font: 600 .76rem var(--font-title); color: var(--primary-ink); background: var(--primary-soft); padding: 2px 8px; border-radius: 6px; }

/* ---------- Programme ---------- */
.obj { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px 16px; padding: 16px 0; border-top: 1px solid var(--line); }
.obj:first-of-type { border-top: 0; padding-top: 4px; }
.obj h3 { margin: 0 0 4px; font-size: 1.02rem; }
.obj .oid { color: var(--primary); margin-right: 6px; }
.notions { display: flex; flex-wrap: wrap; gap: 5px; margin: 8px 0; padding: 0; list-style: none; }
.notions li { font-size: .8rem; background: #f6f5fb; border: 1px solid var(--line); border-radius: 6px; padding: 1px 7px; }
.obj-side { display: flex; flex-direction: column; align-items: flex-end; gap: 8px; text-align: right; }
.obj-links { font-size: .86rem; }
.obj-links .linkbtn { margin-right: 10px; }
.check { display: inline-flex; align-items: center; gap: 6px; font-size: .84rem; color: var(--ink-soft); cursor: pointer; }
.check input { width: 17px; height: 17px; accent-color: var(--primary); }

/* ---------- Cours ---------- */
.course-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; }
.course-card { text-align: left; cursor: pointer; font: inherit; color: inherit; display: flex; flex-direction: column; gap: 6px; transition: border-color .15s, transform .15s; }
.course-card:hover { border-color: var(--primary); transform: translateY(-1px); }
.course-card .num { font: 700 .8rem var(--font-title); color: var(--primary-2); letter-spacing: .06em; }
.course-card h3 { margin: 0; font-size: 1.05rem; }
.course-card p { margin: 0; font-size: .9rem; color: var(--ink-soft); }
.course-card .meta { display: flex; gap: 8px; align-items: center; justify-content: space-between; margin-top: auto; padding-top: 6px; }

.course-detail h2 { font-size: 1.7rem; }
.recall { background: var(--primary-soft); border: 1px solid #d6cef7; border-radius: var(--radius-sm); padding: 12px 16px; margin: 14px 0 22px; }
.recall ul { margin: 6px 0 0; padding-left: 18px; }
.course-section { margin: 26px 0; }
.course-section h3 { color: var(--primary-ink); display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.course-section ul { padding-left: 20px; margin: 0; }
.course-section li { margin: 6px 0; }
.course-nav { display: flex; flex-wrap: wrap; gap: 10px; justify-content: space-between; border-top: 1px solid var(--line); padding-top: 18px; margin-top: 26px; }

/* ---------- Filtres ---------- */
.filters { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 6px; margin-bottom: 14px; scrollbar-width: thin; }
.chip { flex: 0 0 auto; border: 1px solid var(--line-strong); background: var(--card); color: var(--ink-soft); border-radius: 99px; padding: 6px 13px; font: 600 .84rem var(--font-text); cursor: pointer; white-space: nowrap; }
.chip:hover { border-color: var(--primary); color: var(--primary); }
.chip.active { background: var(--primary); border-color: var(--primary); color: #fff; }
.chip .n { opacity: .7; font-weight: 500; margin-left: 3px; }
.active-filter { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; background: #e6eefc; border: 1px solid #c9d8f6; color: #1f4fae; border-radius: var(--radius-sm); padding: 8px 12px; margin-bottom: 14px; font-size: .9rem; }

/* ---------- Question ---------- */
.q-meta { display: flex; flex-wrap: wrap; gap: 6px 10px; align-items: center; font-size: .84rem; color: var(--muted); margin-bottom: 10px; }
.q-text { font-size: 1.08rem; font-weight: 500; margin-bottom: 16px; overflow-wrap: anywhere; }
.answers { display: grid; gap: 9px; }
.answer {
  display: grid; grid-template-columns: 30px minmax(0, 1fr); gap: 10px; align-items: start;
  width: 100%; text-align: left; font: inherit; color: inherit; cursor: pointer;
  background: #fbfaff; border: 1.5px solid var(--line); border-radius: var(--radius-sm); padding: 10px 12px;
  transition: border-color .12s, background .12s;
}
.answer:hover:not(:disabled) { border-color: var(--primary); }
.answer:disabled { cursor: default; }
.answer .letter { display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 7px; background: #fff; border: 1px solid var(--line-strong); font: 700 .85rem var(--font-title); color: var(--primary); }
.answer .txt { overflow-wrap: anywhere; min-width: 0; padding-top: 2px; }
.answer.selected { border-color: var(--primary); background: var(--primary-soft); }
.answer.selected .letter { background: var(--primary); color: #fff; border-color: var(--primary); }
.answer.correct { border-color: var(--good); background: var(--good-soft); }
.answer.correct .letter { background: var(--good); color: #fff; border-color: var(--good); }
.answer.wrong { border-color: var(--bad); background: var(--bad-soft); }
.answer.wrong .letter { background: var(--bad); color: #fff; border-color: var(--bad); }
.answer .why { grid-column: 2; font-size: .86rem; color: var(--ink-soft); border-top: 1px dashed var(--line-strong); padding-top: 6px; margin-top: 2px; }
.answer .why .vf { font-weight: 700; margin-right: 4px; }
.answer .why .vf.t { color: var(--good); }
.answer .why .vf.f { color: var(--bad); }

.feedback { margin-top: 16px; border-radius: var(--radius-sm); padding: 14px 16px; border: 1px solid; overflow-wrap: anywhere; }
.feedback.ok { background: var(--good-soft); border-color: #bfe6d1; }
.feedback.ko { background: var(--bad-soft); border-color: #f5cfb4; }
.feedback h4 { margin: 0 0 6px; font-size: 1rem; }
.feedback.ok h4 { color: var(--good); }
.feedback.ko h4 { color: var(--bad); }
.feedback p:last-child { margin-bottom: 0; }
.q-actions { display: flex; flex-wrap: wrap; gap: 10px; justify-content: space-between; align-items: center; margin-top: 16px; }
.kbd-hint { font-size: .78rem; color: var(--muted); }
.empty { text-align: center; padding: 34px 20px; }
.empty .big { font-size: 2.2rem; }

/* ---------- Examen ---------- */
.exam-layout { display: grid; grid-template-columns: minmax(0, 1fr) 250px; gap: 18px; align-items: start; }
.exam-side { position: sticky; top: 12px; }
.timer { font: 700 1.9rem var(--font-title); color: var(--primary); font-variant-numeric: tabular-nums; }
.timer.low { color: var(--bad); }
.qgrid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 5px; margin: 12px 0; }
.qnum { border: 1px solid var(--line-strong); background: #fff; border-radius: 6px; font: 600 .78rem var(--font-title); padding: 6px 0; cursor: pointer; color: var(--ink-soft); position: relative; min-width: 32px; }
.qnum.answered { background: var(--primary-soft); border-color: #bfb3f2; color: var(--primary-ink); }
.qnum.marked::after { content: ""; position: absolute; top: 2px; right: 2px; width: 7px; height: 7px; border-radius: 50%; background: var(--bad); }
.qnum.current { outline: 2px solid var(--primary); outline-offset: 1px; }
.legend { display: flex; flex-wrap: wrap; gap: 10px; font-size: .76rem; color: var(--muted); }
.legend i { display: inline-block; width: 11px; height: 11px; border-radius: 3px; margin-right: 4px; vertical-align: -1px; border: 1px solid var(--line-strong); }
.legend .l-ans { background: var(--primary-soft); border-color: #bfb3f2; }
.legend .l-mark { background: var(--bad); border-color: var(--bad); border-radius: 50%; }
.legend .l-cur { outline: 2px solid var(--primary); }
.exam-rules { padding-left: 20px; }
.exam-rules li { margin: 4px 0; }
.dist { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 6px 16px; font-size: .88rem; margin: 10px 0 0; padding: 0; list-style: none; }
.notice { background: #fff7e8; border: 1px solid #f3d9a4; border-radius: var(--radius-sm); padding: 10px 14px; font-size: .88rem; color: #6b4a0a; }
.result-head { display: flex; flex-wrap: wrap; gap: 20px; align-items: center; }
.score-big { font: 700 3rem var(--font-title); color: var(--primary); line-height: 1; }
.score-big small { font-size: 1.2rem; color: var(--muted); }
.verdict { font: 700 1.1rem var(--font-title); padding: 6px 14px; border-radius: 99px; }
.verdict.pass { background: var(--good-soft); color: var(--good); }
.verdict.fail { background: var(--bad-soft); color: var(--bad); }
details.errors summary { cursor: pointer; font: 600 1rem var(--font-title); color: var(--primary-ink); padding: 4px 0; }
.err-item { border-top: 1px solid var(--line); padding: 14px 0; overflow-wrap: anywhere; }
.err-item .q-text { font-size: 1rem; margin-bottom: 8px; }
.err-item ul { margin: 6px 0; padding-left: 20px; font-size: .92rem; }
.err-item li.ok { color: var(--good); }
.err-item li.ko { color: var(--bad); }

/* ---------- Tableaux ---------- */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { font: 600 .8rem var(--font-title); color: var(--muted); text-transform: uppercase; letter-spacing: .05em; }
.prio li { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 8px; padding: 9px 0; border-top: 1px solid var(--line); }
.prio li:first-child { border-top: 0; }
.prio { list-style: none; padding: 0; margin: 0; }

/* ---------- KaTeX ---------- */
.katex { font-size: 1.05em; }
.q-text .katex, .answer .katex, .feedback .katex, .course-section .katex { white-space: normal; }
.katex-error { color: #cc0000; }

/* ---------- Mobile ---------- */
@media (max-width: 760px) {
  .wrap { padding: 0 16px; }
  .overline { margin-top: 22px; }
  .obj { grid-template-columns: minmax(0, 1fr); }
  .obj-side { align-items: flex-start; text-align: left; }
  .exam-layout { grid-template-columns: minmax(0, 1fr); }
  .exam-side { position: static; order: -1; padding: 12px 14px; }
  .exam-side .timer { font-size: 1.3rem; }
  .exam-side h3, .exam-side .legend { display: none; }
  .qgrid { display: flex; overflow-x: auto; gap: 5px; margin: 8px 0 4px; padding-bottom: 4px; }
  .qnum { flex: 0 0 36px; }
  .exam-side-top { display: flex; justify-content: space-between; align-items: center; gap: 10px; }
  .card { padding: 16px; }
  .course-grid { grid-template-columns: minmax(0, 1fr); }
}