/* Enveloppe Atelier IA (lot IA-05) : responsive, cibles tactiles >= 44 px, RGAA
   (contrastes, focus visible, lien d'évitement), thème clair/sombre. */
:root {
  --fond: #f8f4ee;
  --texte: #1f1b17;
  --accent: #a9472a;
  --accent-texte: #ffffff;
  --bord: #d8cfc2;
  --cible-tactile: 44px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --fond: #1f1b17;
    --texte: #f8f4ee;
    --bord: #4a443c;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Source Sans 3", system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--fond);
  color: var(--texte);
  line-height: 1.5;
}
header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--bord);
}
.logo { border-radius: 12px; }
h1 { font-size: 1.25rem; margin: 0; }
main { padding: 1rem; max-width: 40rem; margin: 0 auto; }
a, button {
  min-height: var(--cible-tactile);
  min-width: var(--cible-tactile);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-size: 1rem;
}
button, .bouton {
  background: var(--accent);
  color: var(--accent-texte);
  border: none;
  cursor: pointer;
  text-decoration: none;
}
a { color: var(--accent); }
a:focus-visible, button:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}
.lien-evitement {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: var(--accent-texte);
  padding: 0.5rem 1rem;
  z-index: 10;
}
.lien-evitement:focus { left: 0; }
.menton {
  font-size: 0.875rem;
  opacity: 0.85;
  border-top: 1px solid var(--bord);
  padding-top: 0.75rem;
}
@media (max-width: 480px) {
  main { padding: 0.75rem; }
  h1 { font-size: 1.1rem; }
}