:root {
  --paper: #f6f1e6;
  --sheet: #fffdf8;
  --ink: #16233b;
  --ink-soft: #4a5468;
  --rule: #d9cfbb;
  --seal: #a3242b;
  --seal-soft: #f3e3df;
  --gold: #b08a3e;
  --serif: "Libre Caslon Text", Georgia, serif;
  --sans: "Public Sans", "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 17px/1.7 var(--sans);
  background-image:
    radial-gradient(circle at 15% 10%, rgba(176, 138, 62, .07), transparent 40%),
    repeating-linear-gradient(0deg, transparent 0 31px, rgba(22, 35, 59, .025) 31px 32px);
}
a { color: var(--ink); text-decoration-color: var(--seal); text-underline-offset: 3px; }
a:hover { color: var(--seal); }

/* En-tete */
.top {
  max-width: 980px; margin: 0 auto; padding: 18px 16px;
  display: flex; flex-wrap: wrap; gap: 12px 28px; align-items: center; justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 10px; font: 700 19px var(--serif); text-decoration: none; }
.seal {
  width: 38px; height: 38px; border-radius: 50%; display: grid; place-items: center;
  font: 700 13px var(--serif); color: var(--seal); letter-spacing: .04em;
  border: 2px solid var(--seal); box-shadow: inset 0 0 0 3px var(--paper), inset 0 0 0 4px var(--seal);
}
.top nav { display: flex; flex-wrap: wrap; gap: 4px 18px; font-size: 15px; }
.top nav a { text-decoration: none; color: var(--ink-soft); padding: 4px 0; border-bottom: 2px solid transparent; }
.top nav a:hover, .top nav a[aria-current] { color: var(--ink); border-bottom-color: var(--seal); }

/* Feuille */
.sheet {
  max-width: 760px; margin: 8px auto 48px; padding: 44px 56px 52px;
  background: var(--sheet); border: 1px solid var(--rule);
  box-shadow: 0 1px 0 #fff inset, 0 24px 48px -32px rgba(22, 35, 59, .35);
  position: relative;
}
.sheet::before {
  content: ""; position: absolute; left: 30px; top: 0; bottom: 0; width: 1px; background: var(--seal-soft);
}
.crumb { font-size: 13px; color: var(--ink-soft); margin: 0 0 18px; }
.crumb a { color: var(--ink-soft); }
.crumb span { margin: 0 6px; color: var(--rule); }
h1, h2, h3 { font-family: var(--serif); line-height: 1.2; color: var(--ink); }
h1 { font-size: clamp(30px, 5vw, 42px); margin: 0 0 10px; letter-spacing: -.01em; }
h2 { font-size: 26px; margin: 2.2em 0 .6em; padding-top: .6em; border-top: 1px solid var(--rule); }
h3 { font-size: 20px; margin: 1.6em 0 .4em; }
.updated { font-size: 13px; color: var(--ink-soft); margin: 0 0 28px; }
.lead { font: italic 21px/1.55 var(--serif); color: var(--ink); margin: 0 0 1.4em; }
p, li { max-width: 66ch; }
strong { font-weight: 600; }

/* Encadres */
.answer {
  border-left: 4px solid var(--seal); background: var(--seal-soft);
  padding: 16px 20px; margin: 0 0 28px; font-size: 17px;
}
.answer strong:first-child { display: block; font: 700 13px var(--sans); letter-spacing: .08em; text-transform: uppercase; color: var(--seal); margin-bottom: 4px; }
.facts { width: 100%; border-collapse: collapse; margin: 18px 0 26px; font-size: 16px; }
.facts th, .facts td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--rule); vertical-align: top; }
.facts th { font-weight: 600; width: 42%; color: var(--ink-soft); }
.facts td b { font-family: var(--serif); font-size: 18px; }

/* Appel a l'action : jamais de gras au dela de 600 */
.cta {
  margin: 36px 0; padding: 26px 28px; display: grid; grid-template-columns: auto 1fr; gap: 6px 22px; align-items: center;
  border: 1px solid var(--ink); background: var(--ink); color: var(--sheet);
}
.cta .stamp {
  grid-row: span 3; width: 78px; height: 78px; border-radius: 50%; display: grid; place-items: center; text-align: center;
  border: 2px dashed var(--gold); color: var(--gold); font: 700 12px/1.15 var(--serif); transform: rotate(-12deg);
}
.cta h3 { color: var(--sheet); margin: 0; font-size: 21px; }
.cta p { margin: 0; color: #c9cfdb; font-size: 15px; }
.btn {
  justify-self: start; margin-top: 8px; display: inline-block; padding: 12px 22px;
  background: var(--seal); color: #fff; text-decoration: none; font-weight: 600; letter-spacing: .01em;
  border-radius: 2px; transition: transform .15s ease, background .15s ease;
}
.btn:hover { color: #fff; background: #8a1d23; transform: translateY(-1px); }

/* Quiz */
.quiz { counter-reset: q; margin: 24px 0; }
.q { counter-increment: q; border: 1px solid var(--rule); padding: 18px 20px 14px; margin: 0 0 16px; background: #fff; }
.q legend { float: left; width: 100%; font: 600 17px/1.45 var(--sans); padding: 0; margin-bottom: 10px; }
.q legend + label { clear: both; }
.q legend::before { content: counter(q) ". "; font-family: var(--serif); color: var(--seal); }
.q label { display: flex; gap: 10px; align-items: flex-start; padding: 7px 8px; margin: 2px -8px; cursor: pointer; border-radius: 2px; }
.q label:hover { background: var(--paper); }
.q input { margin-top: 6px; accent-color: var(--seal); }
.q.done label { cursor: default; }
.q .right { background: #e4f1e6; }
.q .wrong { background: var(--seal-soft); text-decoration: line-through; text-decoration-color: var(--seal); }
.q .why { display: none; font-size: 15px; color: var(--ink-soft); border-top: 1px dashed var(--rule); margin-top: 10px; padding-top: 10px; }
.q.done .why { display: block; }
.score { font: 700 22px var(--serif); padding: 16px 20px; border: 2px solid var(--ink); display: none; }
.score.show { display: block; }

/* FAQ */
.faq details { border-bottom: 1px solid var(--rule); padding: 12px 0; }
.faq summary { cursor: pointer; font-weight: 600; list-style: none; position: relative; padding-right: 28px; }
.faq summary::after { content: "+"; position: absolute; right: 4px; top: -2px; font: 400 22px var(--serif); color: var(--seal); }
.faq details[open] summary::after { content: "\2212"; }
.faq details div { padding-top: 8px; color: var(--ink-soft); }

.foot { max-width: 760px; margin: 0 auto 40px; padding: 0 16px; font-size: 13px; color: var(--ink-soft); }

@media (max-width: 720px) {
  body { font-size: 16px; }
  .sheet { padding: 28px 18px 36px; margin: 0 0 32px; border-left: 0; border-right: 0; }
  .sheet::before { display: none; }
  .cta { grid-template-columns: 1fr; padding: 22px 18px; }
  .cta .stamp { grid-row: auto; width: 64px; height: 64px; }
  .facts th { width: 46%; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }