:root {
  --ink: #1d2521;
  --muted: #5b6862;
  --bg: #fbfcfb;
  --surface: #ffffff;
  --line: #dfe6e2;
  --accent: #1f6f55;
  --accent-soft: #e6f0ec;
  --error: #a3261e;
  --wrap: 46rem;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 1.0625rem/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 1rem; }

a { color: var(--accent); text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }

.skip { position: absolute; left: -999px; }
.skip:focus { left: 1rem; top: 1rem; background: var(--surface); padding: .5rem 1rem; z-index: 10; }

/* En-tête et menu */
.site-header { background: var(--surface); border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .5rem; padding-top: .75rem; padding-bottom: .75rem; }
.brand { font-weight: 700; color: var(--ink); text-decoration: none; font-size: 1.1rem; }
.nav-button { padding: .35rem .75rem; border: 1px solid var(--line); border-radius: 6px; background: var(--surface); font: inherit; cursor: pointer; }
.nav { flex-basis: 100%; }
.js .nav { display: none; }
.js .nav.open { display: block; }
.nav ul { list-style: none; margin: .5rem 0 0; padding: 0; }
.nav li { margin: 0; }
.nav a { display: block; padding: .4rem 0; text-decoration: none; }
.nav a[aria-current] { font-weight: 700; color: var(--ink); }
.nav li ul { margin: 0 0 .25rem 1rem; font-size: .95rem; }

/* Contenu */
main { padding-top: 1.5rem; padding-bottom: 3rem; }
h1 { font-size: clamp(1.6rem, 4vw, 2.1rem); line-height: 1.2; margin: .25rem 0 .5rem; }
h2 { font-size: 1.4rem; line-height: 1.3; margin: 2rem 0 .5rem; }
h3 { font-size: 1.15rem; margin: 1.5rem 0 .4rem; }
h4 { font-size: 1rem; margin: 1.25rem 0 .3rem; }
p, ul { margin: 0 0 1rem; }
img { max-width: 100%; height: auto; }

.updated { color: var(--muted); font-size: .9rem; margin-bottom: 1.5rem; }
.breadcrumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: .25rem; padding: 0; margin: 0 0 .5rem; font-size: .9rem; color: var(--muted); }
.breadcrumb li + li::before { content: "›"; margin-right: .25rem; }

.definition { background: var(--accent-soft); border-left: 4px solid var(--accent); padding: .75rem 1rem; margin: 0 0 1rem; border-radius: 0 6px 6px 0; }
.video a { display: inline-block; padding: .5rem .9rem; border: 1px solid var(--accent); border-radius: 6px; text-decoration: none; }

.notice { padding: .75rem 1rem; border-radius: 6px; background: var(--accent-soft); }
.notice.error { background: #fbeceb; color: var(--error); }
.notice ul { margin: 0; }

/* Questions des lecteurs */
.questions { margin-top: 3rem; border-top: 1px solid var(--line); padding-top: 1rem; }
.question { padding: .75rem 0; border-bottom: 1px solid var(--line); }
.question.reponse { margin-left: 1.5rem; }
.question p { margin: 0 0 .35rem; }
.question-meta { font-size: .9rem; color: var(--muted); }

/* Formulaire */
.contact label { display: block; font-weight: 600; margin-bottom: .25rem; }
.contact input, .contact textarea { width: 100%; padding: .55rem .65rem; border: 1px solid #b9c4be; border-radius: 6px; font: inherit; background: var(--surface); }
.contact button { padding: .6rem 1.2rem; border: 0; border-radius: 6px; background: var(--accent); color: #fff; font: inherit; font-weight: 600; cursor: pointer; }
.hp { position: absolute; left: -9999px; }
.small { font-size: .875rem; color: var(--muted); }

/* Pied de page */
.site-footer { border-top: 1px solid var(--line); background: var(--surface); font-size: .9rem; color: var(--muted); }
.site-footer .wrap { padding-top: 1rem; padding-bottom: 1.5rem; }
.site-footer ul { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: .25rem 1rem; margin: 0; }

@media (min-width: 60rem) {
  .nav-button { display: none; }
  .js .nav, .nav { display: block; }
  .nav > ul { display: flex; flex-wrap: wrap; gap: 0 1.25rem; margin: 0; }
  .nav li.has-sub { position: relative; }
  .nav li ul { display: none; position: absolute; top: 100%; left: 0; background: var(--surface); border: 1px solid var(--line); border-radius: 6px; padding: .5rem 1rem; margin: 0; min-width: 20rem; z-index: 5; }
  .nav li.has-sub:hover > ul, .nav li.has-sub:focus-within > ul { display: block; }
}