/* Base du thème : réinitialisation, typographie, boutons, en-tête, pied de page. */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 96px; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 16px/1.4 var(--font); letter-spacing: -0.03em; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; border-radius: 4px; }
h1, h2, h3, p { margin: 0; }
img { max-width: 100%; height: auto; }
[hidden] { display: none !important; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; animation: none !important; } }

h1 { font-weight: 500; font-size: 42px; line-height: 1.1; letter-spacing: -1.26px; }
h2 { font-weight: 500; font-size: 24px; line-height: 1.2; letter-spacing: -0.72px; }
h3 { font-weight: 500; font-size: 20px; line-height: 1.4; letter-spacing: -0.6px; }
mark { background: linear-gradient(transparent 58%, var(--yellow) 58%); color: inherit; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding-left: 24px; padding-right: 24px; }
.skip-link { position: absolute; left: -9999px; top: 0; background: var(--ink); color: #fff; padding: 12px 18px; z-index: 100; }
.skip-link:focus { left: 12px; top: 12px; }

/* Boutons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 12px; font: 400 16px/1.4 var(--font); letter-spacing: -0.03em; color: var(--ink); padding: 12px 18px; border-radius: var(--r10); border: 1px solid var(--ink); background: transparent; cursor: pointer; white-space: nowrap; }
.btn:hover { background: var(--fog); text-decoration: none; }
.btn--primary { background: var(--yellow); }
.btn--primary:hover { background: var(--yellow); box-shadow: inset 0 0 0 1px var(--ink); }
.btn--ink { background: var(--ink); color: var(--yellow); }
.btn--ink:hover { background: var(--ink); outline: 2px solid var(--ink); outline-offset: 2px; }
.btn--ghost { border-color: transparent; padding-left: 12px; padding-right: 12px; }
.btn--sm { padding: 6px 12px; }

/* En-tête */
.site-header { position: sticky; top: 0; z-index: 10; background: var(--paper); }
.bar { height: 72px; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 24px; }
.logo { display: inline-flex; align-items: center; gap: 8px; font-size: 20px; letter-spacing: -0.6px; }
.logo:hover { text-decoration: none; }
.nav { display: flex; gap: 24px; }
.nav a { padding: 6px 0; white-space: nowrap; }
.nav a[aria-current="page"] { background: linear-gradient(transparent 62%, var(--yellow) 62%); }
.bar-right { display: flex; justify-content: flex-end; align-items: center; gap: 12px; }
.menu-btn { display: none; }
.menu-panel { display: grid; gap: 6px; padding-top: 12px; padding-bottom: 24px; border-top: 1px solid var(--ink); }
.menu-panel a { padding: 12px 0; font-size: 20px; letter-spacing: -0.6px; }

/* Pied de page */
.site-footer { margin-top: 96px; border-top: 1px solid var(--ink); }
.foot { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; padding: 36px 24px 48px; align-items: center; }
.foot ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 24px; flex-wrap: wrap; font-size: 14px; letter-spacing: -0.42px; }

@media (max-width: 1040px) {
  .bar { grid-template-columns: 1fr auto; height: 66px; }
  .nav, .bar-right .btn--ghost:not(.menu-btn) { display: none; }
  .menu-btn { display: inline-flex; }
}
@media (min-width: 1041px) { .menu-panel { display: none; } }
@media (max-width: 520px) { .bar-right .cta-join { display: none; } }
@media (max-width: 900px) {
  .btn { white-space: normal; text-align: center; }
  h1 { font-size: 36px; letter-spacing: -1.08px; }
  .site-footer { margin-top: 66px; }
}