* { box-sizing: border-box; }
html, body { margin: 0; background: #f6f7f6; }
body { font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif; color: #14181a; }
main { max-width: 460px; margin: 0 auto; padding: 22px 16px 48px; min-height: 100vh; }
header { display: flex; align-items: center; gap: 10px; font-size: 20px; margin-bottom: 18px; }
.progression { height: 6px; background: #e3e8e5; border-radius: 6px; overflow: hidden; margin-bottom: 28px; }
#barre { height: 100%; width: 0; background: #2bd46b; transition: width .35s ease; }
.etape { background: #fff; border-radius: 18px; padding: 26px 20px; box-shadow: 0 2px 10px rgba(0,0,0,.05); }
.entree { animation: entree .35s cubic-bezier(.2,.7,.3,1); }
@keyframes entree { from { opacity: 0; transform: translateX(24px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .entree { animation: none; } #barre { transition: none; } }
.numero { color: #0f6e56; font-weight: 600; font-size: 13px; text-transform: uppercase; letter-spacing: .04em; margin: 0 0 8px; }
h1 { font-size: 24px; line-height: 1.25; margin: 0 0 10px; }
.aide { color: #555; line-height: 1.5; margin: 0 0 18px; }
input { display: block; width: 100%; margin: 14px 0 18px; padding: 14px; font-size: 18px; border: 1.5px solid #ccd3cf; border-radius: 12px; background: #fff; }
input:focus { outline: none; border-color: #0f6e56; }
.champ-tel { display: flex; align-items: center; gap: 8px; }
.champ-tel span { font-size: 18px; font-weight: 600; padding: 14px 4px; }
.champ-tel input { flex: 1; }
button { width: 100%; padding: 15px; font-size: 16px; font-weight: 600; color: #fff; background: #0f6e56; border: 0; border-radius: 12px; cursor: pointer; }
button:disabled { opacity: .6; }
.choix-liste { display: grid; gap: 10px; margin: 16px 0 18px; }
.carte { text-align: left; color: #14181a; background: #fff; border: 1.5px solid #ccd3cf; font-size: 17px; }
.carte small { display: block; font-weight: 400; color: #666; font-size: 13px; margin-top: 3px; }
.carte.choisi { border-color: #0f6e56; background: #eaf7f0; }
.case { display: flex; gap: 10px; align-items: flex-start; line-height: 1.45; font-size: 15px; margin: 0 0 18px; }
.case input { width: 22px; height: 22px; margin: 1px 0 0; flex: none; }
.erreur { color: #b42318; min-height: 1.2em; margin: 14px 4px 0; }
.retour { background: none; color: #555; font-weight: 500; margin-top: 4px; }
.coche { width: 64px; height: 64px; border-radius: 50%; background: #2bd46b; color: #fff; font-size: 34px; display: flex; align-items: center; justify-content: center; margin-bottom: 16px; }