:root {
  --encre: #10243b; --marine: #0d1b3a; --azur: #2b82f5; --ciel: #e8f1fd;
  --sable: #f6f4ef; --corail: #2b82f5; --gris: #5b6b7c; --fond: #fff; --trait: #d9e2ec;
}
@media (prefers-color-scheme: dark) {
  :root { --encre: #e6edf5; --marine: #08122a; --azur: #6aa8ff; --ciel: #12304f;
    --sable: #0f1d2d; --gris: #9fb0c3; --fond: #0a1522; --trait: #23374d; }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font: 17px/1.65 system-ui, -apple-system, "Segoe UI", sans-serif; color: var(--encre); background: var(--fond); }
a { color: var(--azur); }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .6em; }
h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); }
h1 em { font-style: normal; color: #6aa8ff; }
.conteneur { width: min(1100px, 100% - 32px); margin-inline: auto; }
.evitement { position: absolute; left: -999px; } .evitement:focus { left: 8px; top: 8px; background: #fff; padding: 8px; z-index: 10; }

.entete { position: sticky; top: 0; z-index: 5; background: var(--marine); color: #fff; }
.entete__ligne { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-block: 12px; flex-wrap: wrap; }
.marque { display: flex; align-items: center; gap: 10px; color: #fff; text-decoration: none; font-size: 1.15rem; }
.marque__logo { height: 44px; width: auto; }
.menu { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.menu a:not(.bouton) { color: #dbe7f5; text-decoration: none; font-size: .95rem; }
.menu a:not(.bouton):hover { color: #fff; }

.bouton { display: inline-block; padding: 12px 22px; border-radius: 999px; background: #1f6fe0; color: #fff; font-weight: 600; text-decoration: none; }
.bouton:hover { filter: brightness(1.08); }
.bouton--petit { padding: 7px 16px; font-size: .9rem; }
.bouton--grand { padding: 16px 32px; font-size: 1.15rem; }
.bouton--clair { background: transparent; border: 2px solid rgba(255,255,255,.5); }
.actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }

.heros { background: linear-gradient(135deg, var(--marine), #123a78); color: #fff; padding: 72px 0; }
.heros__grille { display: grid; grid-template-columns: 1.4fr 1fr; gap: 48px; align-items: center; }
.chapeau { font-size: 1.15rem; color: #dbe7f5; max-width: 40em; }
.heros__points { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.heros__points li { background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.15); border-radius: 14px; padding: 16px 18px; }
.heros__points strong { display: block; } .heros__points span { color: #c3d4e8; font-size: .95rem; }

.surtitre { text-transform: uppercase; letter-spacing: .1em; font-size: .8rem; font-weight: 700; color: var(--azur); margin: 0 0 .6em; }
.bloc { padding: 72px 0; }
.bloc--teinte { background: var(--sable); }
.bloc--partenaire { background: var(--ciel); }
.bloc--contact { background: var(--marine); color: #fff; text-align: center; }
.duo { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.liste { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.liste li { padding: 12px 16px 12px 44px; position: relative; background: var(--fond); border: 1px solid var(--trait); border-radius: 12px; }
.liste li::before { content: "✓"; position: absolute; left: 16px; color: var(--azur); font-weight: 800; }
.cartes { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; margin-top: 28px; }
.carte { border: 1px solid var(--trait); border-radius: 16px; padding: 24px; background: var(--sable); }
.carte h3 { font-size: 1.15rem; }
.note { color: var(--gris); margin-top: 28px; }
.etapes { margin: 0; padding-left: 1.2em; display: grid; gap: 12px; }
.lien-fleche { font-weight: 700; }
.contact p { color: #dbe7f5; }

.pied { background: var(--marine); color: #c3d4e8; padding: 24px 0; font-size: .9rem; }
.pied__ligne { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.pied a { color: #c3d4e8; margin-left: 16px; }

.page { padding: 56px 0 80px; max-width: 780px; }
.page h2 { margin-top: 1.6em; font-size: 1.3rem; }
.trou { background: #fff3cd; color: #5c4400; padding: 2px 8px; border-radius: 6px; }
.alerte { border-left: 4px solid var(--azur); background: var(--sable); padding: 12px 18px; border-radius: 8px; }

@media (max-width: 800px) {
  .heros__grille, .duo { grid-template-columns: 1fr; gap: 28px; }
  .duo--inverse > :first-child { order: 2; }
  .bloc { padding: 48px 0; } .heros { padding: 48px 0; }
  .menu { gap: 12px; } .pied a { margin: 0 16px 0 0; }
}

/* Formulaire de contact */
.bloc--contact { text-align: left; }
.contact { display: grid; grid-template-columns: 1fr 1.3fr; gap: 56px; align-items: start; }
.contact__direct a { color: #fff; font-weight: 700; }
.formulaire { background: var(--fond); color: var(--encre); border-radius: 20px; padding: 28px; display: grid; gap: 16px; box-shadow: 0 20px 50px rgba(0,0,0,.25); }
.formulaire__duo { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.champ { display: grid; gap: 6px; }
.champ label { font-size: .85rem; font-weight: 600; color: var(--gris); }
.champ input, .champ select, .champ textarea { font: inherit; color: var(--encre); background: var(--fond); border: 1.5px solid var(--trait); border-radius: 10px; padding: 11px 13px; width: 100%; }
.champ input:focus, .champ select:focus, .champ textarea:focus { outline: 3px solid color-mix(in srgb, var(--azur) 35%, transparent); border-color: var(--azur); }
.formulaire .bouton { border: 0; cursor: pointer; justify-self: start; font: inherit; font-weight: 600; }
.formulaire__legal { margin: 0; font-size: .85rem; color: var(--gris); }
.formulaire__erreur { background: #fde8e4; color: #8a2a12; border-radius: 10px; padding: 10px 14px; margin: 0; }
.formulaire__erreur p { margin: 0; }
.champ-piege { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
@media (max-width: 800px) { .contact, .formulaire__duo { grid-template-columns: 1fr; } .contact { gap: 28px; } }