:root {
  --fond: #f6f7fb;
  --carte: #ffffff;
  --texte: #14161f;
  --doux: #5d6375;
  --trait: #e3e6ef;
  --accent: #4f5bd5;
  --accent-fort: #3c47b8;
  --accent-pale: #eceefe;
  --ok: #1f9d6b;
  --erreur: #c9364a;
  --rayon: 14px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --fond: #0f1117;
    --carte: #171a23;
    --texte: #eceef5;
    --doux: #9aa0b4;
    --trait: #262a37;
    --accent: #7d87f0;
    --accent-fort: #9aa2f5;
    --accent-pale: #1e2236;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--fond);
  color: var(--texte);
  font: 16px/1.55 Inter, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

header {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 1040px; width: 100%; margin: 0 auto; padding: 18px 20px;
}
.marque { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 19px; color: var(--texte); letter-spacing: -0.01em; }
.marque:hover { text-decoration: none; }
.marque svg { width: 30px; height: 30px; }
nav { display: flex; gap: 22px; font-size: 15px; }
nav a { color: var(--doux); }
nav a:hover { color: var(--texte); text-decoration: none; }

main { flex: 1; width: 100%; max-width: 1040px; margin: 0 auto; padding: 0 20px 48px; }

.hero { text-align: center; padding: 48px 0 28px; }
.hero h1 { font-size: clamp(30px, 5vw, 46px); line-height: 1.12; margin: 0 0 14px; letter-spacing: -0.025em; }
.hero p { color: var(--doux); font-size: 18px; margin: 0 auto; max-width: 560px; }

.depot {
  background: var(--carte); border: 2px dashed var(--trait); border-radius: 20px;
  max-width: 680px; margin: 26px auto 0; padding: 44px 24px; text-align: center;
  transition: border-color .15s, background .15s; cursor: pointer;
}
.depot.survol { border-color: var(--accent); background: var(--accent-pale); }
.depot svg { width: 46px; height: 46px; color: var(--accent); }
.depot strong { display: block; font-size: 19px; margin: 12px 0 4px; }
.depot .petit { color: var(--doux); font-size: 14px; }
.bouton {
  display: inline-block; border: 0; border-radius: 10px; background: var(--accent); color: #fff;
  font: inherit; font-weight: 600; font-size: 15px; line-height: 1; padding: 13px 22px; cursor: pointer; margin-top: 18px;
}
.bouton:hover { background: var(--accent-fort); text-decoration: none; }
.bouton.second { background: transparent; color: var(--accent); border: 1px solid var(--trait); }

.barre { height: 8px; background: var(--trait); border-radius: 99px; overflow: hidden; margin: 18px auto 6px; max-width: 420px; }
.barre div { height: 100%; width: 0; background: var(--accent); transition: width .2s; }
.lien { display: flex; gap: 8px; max-width: 520px; margin: 16px auto 0; }
.lien input { flex: 1; min-width: 0; padding: 12px 14px; border-radius: 10px; border: 1px solid var(--trait); background: var(--fond); color: var(--texte); font: inherit; font-size: 15px; }
.lien .bouton { margin: 0; }
.message { margin-top: 12px; font-size: 14px; }
.message.erreur { color: var(--erreur); }
.message.ok { color: var(--ok); }

.atouts { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin-top: 56px; }
.atout { background: var(--carte); border: 1px solid var(--trait); border-radius: var(--rayon); padding: 22px; }
.atout h3 { margin: 0 0 6px; font-size: 16px; }
.atout p { margin: 0; color: var(--doux); font-size: 15px; }

.lecture { max-width: 960px; margin: 8px auto 0; }
.ecran { background: #000; border-radius: var(--rayon); overflow: hidden; aspect-ratio: 16 / 9; display: flex; align-items: center; justify-content: center; }
.ecran video, .ecran img { width: 100%; height: 100%; object-fit: contain; display: block; }
.infos { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 10px; margin-top: 16px; }
.infos h1 { font-size: 20px; margin: 0; word-break: break-word; }
.infos .petit { color: var(--doux); font-size: 14px; }
.actions { display: flex; gap: 10px; flex-wrap: wrap; }
.actions .bouton { margin: 0; padding: 10px 16px; font-size: 14px; }

.page { max-width: 640px; margin: 24px auto 0; background: var(--carte); border: 1px solid var(--trait); border-radius: 20px; padding: 32px; }
.page h1 { margin-top: 0; font-size: 26px; letter-spacing: -0.02em; }
.page p, .page li { color: var(--doux); }
label { display: block; font-weight: 600; font-size: 14px; margin: 16px 0 6px; }
input[type=text], textarea, select {
  width: 100%; padding: 12px 14px; border-radius: 10px; border: 1px solid var(--trait);
  background: var(--fond); color: var(--texte); font: inherit; font-size: 15px;
}
textarea { min-height: 110px; resize: vertical; }
.cache { display: none; }

footer { border-top: 1px solid var(--trait); color: var(--doux); font-size: 13px; }
footer div { max-width: 1040px; margin: 0 auto; padding: 18px 20px; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px; }
footer a { color: var(--doux); }

@media (max-width: 560px) {
  nav { gap: 14px; font-size: 14px; }
  .hero { padding-top: 28px; }
  .page { padding: 22px; }
  .lien { flex-direction: column; }
}