:root {
  --nuit: #001B49;
  --bleu: #047EFA;
  --texte: #1B2440;
  --doux: #5B6683;
  --fond: #F5F7FC;
  --carte: #FFFFFF;
  --bord: #E3E8F3;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
  color: var(--texte);
  background: var(--fond);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--bleu); }

.conteneur { width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* Barre du haut */
.barre { background: var(--carte); border-bottom: 1px solid var(--bord); }
.barre .conteneur { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 16px; }
.barre img { height: 30px; width: auto; display: block; }
.bouton {
  display: inline-block; background: var(--bleu); color: #fff; text-decoration: none; font-weight: 700;
  padding: 12px 22px; border-radius: 999px; transition: transform .15s ease, box-shadow .15s ease; white-space: nowrap;
}
.bouton:hover { transform: translateY(-1px); box-shadow: 0 8px 20px rgba(4, 126, 250, .3); }
.bouton.petit { padding: 9px 16px; font-size: 14px; }
.bouton.clair { background: #fff; color: var(--nuit); }

/* Accroche */
.accroche { position: relative; overflow: hidden; background: var(--carte); padding: 80px 0 88px; }
.accroche .radar { position: absolute; right: -180px; top: 50%; transform: translateY(-50%); width: 620px; height: 620px; opacity: .55; pointer-events: none; }
.accroche .conteneur { position: relative; }
.etiquette { display: inline-block; color: var(--bleu); background: #E8F2FF; font-weight: 700; font-size: 13px; letter-spacing: .04em; text-transform: uppercase; padding: 6px 12px; border-radius: 999px; }
.accroche h1 { color: var(--nuit); font-size: clamp(32px, 5vw, 52px); line-height: 1.12; margin: 18px 0 18px; max-width: 720px; letter-spacing: -.02em; }
.accroche p { font-size: 18px; color: var(--doux); max-width: 600px; margin: 0 0 32px; }

/* Sections */
section { padding: 72px 0; }
h2 { color: var(--nuit); font-size: clamp(26px, 3.5vw, 36px); line-height: 1.2; margin: 0 0 12px; letter-spacing: -.01em; }
.intro { color: var(--doux); font-size: 17px; max-width: 640px; margin: 0 0 40px; }

.grille { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.carte { background: var(--carte); border: 1px solid var(--bord); border-radius: 16px; padding: 28px; }
.carte .icone { width: 44px; height: 44px; border-radius: 12px; background: #E8F2FF; display: grid; place-items: center; margin-bottom: 16px; }
.carte h3 { color: var(--nuit); font-size: 19px; margin: 0 0 8px; }
.carte p { margin: 0; color: var(--doux); }

/* Étapes */
.etapes { background: var(--nuit); color: #fff; }
.etapes h2 { color: #fff; }
.etapes .intro { color: #B9C4DD; }
.liste-etapes { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: etape; }
.liste-etapes li { background: rgba(255, 255, 255, .06); border: 1px solid rgba(255, 255, 255, .12); border-radius: 16px; padding: 24px; counter-increment: etape; }
.liste-etapes li::before { content: "0" counter(etape); display: block; color: var(--bleu); font-weight: 800; font-size: 22px; margin-bottom: 10px; }
.liste-etapes h3 { margin: 0 0 6px; font-size: 18px; }
.liste-etapes p { margin: 0; color: #B9C4DD; font-size: 15px; }

/* Contact */
.contact { text-align: center; }
.contact .intro { margin-left: auto; margin-right: auto; }
.coordonnees { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px 28px; margin-top: 28px; font-weight: 600; }
.coordonnees a { color: var(--nuit); text-decoration: none; }
.coordonnees a:hover { color: var(--bleu); }

/* Bas de page */
footer { background: var(--nuit); color: #B9C4DD; padding: 48px 0 32px; font-size: 14px; }
footer img { height: 26px; width: auto; display: block; margin-bottom: 20px; }
footer h3 { color: #fff; font-size: 15px; margin: 0 0 8px; }
footer a { color: #fff; }
.bas { display: grid; grid-template-columns: 1.2fr 1fr; gap: 32px; }
.bas p { margin: 0 0 6px; }
.copyright { border-top: 1px solid rgba(255, 255, 255, .12); margin-top: 32px; padding-top: 20px; }

/* Page texte (confidentialité) */
.texte { background: var(--carte); border: 1px solid var(--bord); border-radius: 16px; padding: 40px; margin: 48px auto; max-width: 820px; }
.texte h1 { color: var(--nuit); font-size: clamp(28px, 4vw, 38px); margin: 0 0 6px; }
.texte .maj { color: var(--doux); margin: 0 0 28px; }
.texte h2 { font-size: 21px; margin: 28px 0 8px; }
.texte p, .texte li { color: var(--texte); }

@media (max-width: 900px) {
  .grille { grid-template-columns: 1fr; }
  .liste-etapes { grid-template-columns: 1fr 1fr; }
  .bas { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .barre .bouton { display: none; }
  .accroche { padding: 56px 0 64px; }
  .accroche .radar { width: 420px; height: 420px; right: -220px; opacity: .35; }
  section { padding: 56px 0; }
  .liste-etapes { grid-template-columns: 1fr; }
  .texte { padding: 24px; margin: 24px 16px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .bouton { transition: none; }
}