:root {
  --bleu: #0A72B8;
  --bleu-fonce: #08497a;
  --rouge: #C62127;
  --nuit: #0f1b2a;
  --texte: #1d2733;
  --gris: #5c6773;
  --fond: #f4f6f9;
  --blanc: #fff;
  --rayon: 14px;
  --ombre: 0 10px 30px rgba(15, 27, 42, .10);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--texte);
  background: var(--blanc);
  line-height: 1.6;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
.conteneur { width: min(1180px, 100% - 32px); margin-inline: auto; }

/* ---------- En-tête ---------- */
.entete {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(8px);
  box-shadow: 0 1px 0 rgba(0,0,0,.06);
}
.entete .conteneur { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.marque { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.marque img { width: 46px; height: 46px; }
.marque strong { display: block; font-family: "Montserrat", sans-serif; font-size: 1.15rem; letter-spacing: .02em; line-height: 1.1; }
.marque strong span:first-child { color: var(--bleu); }
.marque strong span:last-child { color: var(--rouge); }
.marque small { color: var(--gris); font-size: .75rem; letter-spacing: .12em; text-transform: uppercase; }

.menu { display: flex; gap: 28px; list-style: none; align-items: center; }
.menu a { text-decoration: none; font-weight: 500; font-size: .95rem; }
.menu a:hover { color: var(--bleu); }
.menu .bouton { color: #fff; }
.burger { display: none; background: none; border: 0; font-size: 1.8rem; cursor: pointer; color: var(--nuit); }

/* ---------- Boutons ---------- */
.bouton {
  display: inline-block; padding: 12px 24px; border-radius: 999px;
  background: var(--rouge); color: #fff; text-decoration: none; font-weight: 600;
  border: 2px solid var(--rouge); transition: transform .15s, background .15s;
  cursor: pointer; font-size: 1rem;
}
.bouton:hover { transform: translateY(-2px); background: #a91b20; }
.bouton.contour { background: transparent; border-color: #fff; }
.bouton.contour:hover { background: rgba(255,255,255,.12); }

/* ---------- Héros ---------- */
.heros {
  min-height: 100vh; display: grid; align-items: center; color: #fff;
  background:
    linear-gradient(100deg, rgba(8,32,60,.92) 0%, rgba(8,32,60,.70) 45%, rgba(8,32,60,.25) 100%),
    url("images/hero.jpg") center/cover no-repeat;
  padding-top: 72px;
}
.heros .etiquette {
  display: inline-block; padding: 6px 14px; border-radius: 999px;
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.25);
  font-size: .85rem; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 20px;
}
.heros h1 {
  font-family: "Montserrat", sans-serif; font-size: clamp(2.2rem, 5.5vw, 4rem);
  line-height: 1.1; max-width: 760px; margin-bottom: 20px;
}
.heros h1 em { font-style: normal; color: #ff5a5f; }
.heros p { font-size: 1.15rem; max-width: 600px; opacity: .92; margin-bottom: 32px; }
.heros .actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- Sections ---------- */
section { padding: 96px 0; }
.titre-section { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.titre-section .sur-titre { color: var(--rouge); font-weight: 700; letter-spacing: .14em; text-transform: uppercase; font-size: .8rem; }
.titre-section h2 { font-family: "Montserrat", sans-serif; font-size: clamp(1.8rem, 3.5vw, 2.6rem); line-height: 1.2; margin: 8px 0 14px; color: var(--nuit); }
.titre-section p { color: var(--gris); }
.fond-gris { background: var(--fond); }

/* Atouts */
.atouts { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: -150px; position: relative; z-index: 2; padding: 0; }
.atout { background: #fff; padding: 28px; border-radius: var(--rayon); box-shadow: var(--ombre); border-top: 4px solid var(--bleu); }
.atout:nth-child(even) { border-top-color: var(--rouge); }
.atout .icone { font-size: 1.8rem; }
.atout h3 { font-size: 1.05rem; margin: 10px 0 6px; color: var(--nuit); }
.atout p { color: var(--gris); font-size: .93rem; }

/* À propos */
.apropos { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.apropos .photos { position: relative; }
.apropos .photos img { border-radius: var(--rayon); box-shadow: var(--ombre); }
.apropos .photos img:last-child {
  position: absolute; width: 55%; right: -24px; bottom: -40px; border: 6px solid #fff;
}
.apropos h2 { font-family: "Montserrat", sans-serif; font-size: clamp(1.8rem, 3.5vw, 2.4rem); line-height: 1.2; margin: 8px 0 18px; color: var(--nuit); }
.apropos p { color: var(--gris); margin-bottom: 14px; }
.liste-coche { list-style: none; margin: 20px 0 28px; display: grid; gap: 10px; }
.liste-coche li::before { content: "✔"; color: var(--bleu); font-weight: 700; margin-right: 10px; }

/* Services */
.services { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.service { background: #fff; border-radius: var(--rayon); overflow: hidden; box-shadow: var(--ombre); transition: transform .2s; }
.service:hover { transform: translateY(-6px); }
.service img { height: 210px; width: 100%; object-fit: cover; }
.service div { padding: 22px 24px 26px; }
.service h3 { color: var(--nuit); margin-bottom: 8px; font-size: 1.15rem; }
.service p { color: var(--gris); font-size: .95rem; }

/* Réalisations */
.galerie { display: grid; grid-template-columns: repeat(4, 1fr); grid-auto-rows: 220px; gap: 14px; }
.galerie figure { position: relative; border-radius: var(--rayon); overflow: hidden; }
.galerie figure.large { grid-column: span 2; }
.galerie figure.haute { grid-row: span 2; }
.galerie img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.galerie figure:hover img { transform: scale(1.06); }
.galerie figcaption {
  position: absolute; inset: auto 0 0 0; padding: 14px 16px; color: #fff; font-weight: 600;
  background: linear-gradient(transparent, rgba(0,0,0,.7));
}

/* Étapes */
.etapes { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: etape; }
.etape { text-align: center; padding: 10px; }
.etape::before {
  counter-increment: etape; content: counter(etape);
  display: grid; place-items: center; width: 56px; height: 56px; margin: 0 auto 16px;
  border-radius: 50%; background: var(--bleu); color: #fff; font-weight: 800; font-size: 1.3rem;
}
.etape:nth-child(even)::before { background: var(--rouge); }
.etape h3 { color: var(--nuit); margin-bottom: 6px; }
.etape p { color: var(--gris); font-size: .95rem; }

/* Bandeau appel */
.bandeau {
  color: #fff; text-align: center; padding: 80px 0;
  background: linear-gradient(rgba(8,32,60,.85), rgba(8,32,60,.85)), url("images/bandeau.jpg") center/cover;
}
.bandeau h2 { font-family: "Montserrat", sans-serif; font-size: clamp(1.6rem, 3.5vw, 2.4rem); margin-bottom: 12px; }
.bandeau p { opacity: .9; margin-bottom: 28px; }

/* Contact */
.contact { display: grid; grid-template-columns: 1fr 1.3fr; gap: 40px; }
.infos { background: var(--nuit); color: #fff; padding: 36px; border-radius: var(--rayon); }
.infos h3 { font-size: 1.3rem; margin-bottom: 20px; }
.infos .ligne { display: flex; gap: 14px; margin-bottom: 18px; }
.infos .ligne span:first-child { font-size: 1.3rem; }
.infos .ligne small { display: block; opacity: .65; font-size: .8rem; text-transform: uppercase; letter-spacing: .08em; }
.infos a { color: #fff; }
.infos .legal { margin-top: 24px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.15); font-size: .85rem; opacity: .8; }
form { background: #fff; padding: 36px; border-radius: var(--rayon); box-shadow: var(--ombre); display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
form .plein { grid-column: 1 / -1; }
label { font-size: .85rem; font-weight: 600; color: var(--nuit); display: block; margin-bottom: 6px; }
input, select, textarea {
  width: 100%; padding: 12px 14px; border: 1px solid #d5dbe3; border-radius: 10px;
  font: inherit; background: #fbfcfd;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--bleu); border-color: transparent; }
textarea { min-height: 130px; resize: vertical; }

/* Pied de page */
.pied { background: #0a1320; color: rgba(255,255,255,.75); padding: 56px 0 24px; font-size: .92rem; }
.pied .colonnes { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; margin-bottom: 36px; }
.pied h4 { color: #fff; margin-bottom: 14px; }
.pied ul { list-style: none; display: grid; gap: 8px; }
.pied a { text-decoration: none; }
.pied a:hover { color: #fff; }
.pied .marque strong { color: #fff; }
.pied .bas { border-top: 1px solid rgba(255,255,255,.1); padding-top: 20px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; font-size: .82rem; }

/* Page mentions légales */
.page-legale { padding: 140px 0 80px; }
.page-legale h1 { font-family: "Montserrat", sans-serif; color: var(--nuit); margin-bottom: 30px; }
.page-legale h2 { color: var(--bleu); margin: 32px 0 10px; font-size: 1.25rem; }
.page-legale p, .page-legale li { color: var(--gris); }
.page-legale table { border-collapse: collapse; width: 100%; max-width: 640px; }
.page-legale td { padding: 8px 12px; border-bottom: 1px solid #e3e7ec; }
.page-legale td:first-child { font-weight: 600; color: var(--nuit); width: 45%; }

/* Animation d'apparition */
.apparait { opacity: 0; transform: translateY(24px); transition: opacity .7s, transform .7s; }
.apparait.visible { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .atouts { grid-template-columns: repeat(2, 1fr); }
  .services { grid-template-columns: repeat(2, 1fr); }
  .galerie { grid-template-columns: repeat(2, 1fr); }
  .etapes { grid-template-columns: repeat(2, 1fr); }
  .apropos, .contact { grid-template-columns: 1fr; }
  .apropos .photos img:last-child { right: 0; }
  .pied .colonnes { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 1000px) {
  .burger { display: block; }
  .menu {
    position: absolute; top: 72px; left: 0; right: 0; flex-direction: column; gap: 0;
    background: #fff; box-shadow: 0 10px 20px rgba(0,0,0,.08); display: none; padding: 10px 0 20px;
  }
  .menu.ouvert { display: flex; }
  .menu li { width: 100%; text-align: center; padding: 10px 0; }
  section { padding: 72px 0; }
  .atouts { margin-top: -80px; }
}
@media (max-width: 560px) {
  .atouts, .services, .galerie, .etapes, .pied .colonnes { grid-template-columns: 1fr; }
  .galerie figure.large { grid-column: auto; }
  .galerie figure.haute { grid-row: auto; }
  form { grid-template-columns: 1fr; padding: 24px; }
  .apropos .photos img:last-child { display: none; }
  .marque small { display: none; }
}

/* ---------- Avant / après ---------- */
.comparaisons { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.comparaison { background: #fff; border-radius: var(--rayon); overflow: hidden; box-shadow: var(--ombre); }
.comparaison figcaption { padding: 18px 22px 22px; color: var(--gris); font-size: .95rem; }
.comparaison figcaption strong { display: block; color: var(--nuit); font-size: 1.1rem; margin-bottom: 4px; }
.ba { position: relative; aspect-ratio: 3 / 4; overflow: hidden; user-select: none; touch-action: pan-y; }
.ba img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.ba .ba-avant { clip-path: inset(0 calc(100% - var(--pos)) 0 0); }
.ba-ligne {
  position: absolute; top: 0; bottom: 0; left: var(--pos); width: 3px; margin-left: -1.5px;
  background: #fff; box-shadow: 0 0 8px rgba(0,0,0,.4); pointer-events: none;
}
.ba-ligne::after {
  content: "◀ ▶"; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  background: #fff; color: var(--nuit); font-size: .7rem; letter-spacing: 2px; white-space: nowrap;
  padding: 10px 10px; border-radius: 999px; box-shadow: 0 2px 10px rgba(0,0,0,.3);
}
.ba-tag {
  position: absolute; top: 12px; padding: 4px 12px; border-radius: 999px; font-size: .75rem;
  font-weight: 700; text-transform: uppercase; letter-spacing: .08em; color: #fff; pointer-events: none;
}
.ba-tag.gauche { left: 12px; background: var(--rouge); }
.ba-tag.droite { right: 12px; background: var(--bleu); }
.ba input[type=range] {
  position: absolute; inset: 0; width: 100%; height: 100%; margin: 0; opacity: 0; cursor: ew-resize;
  -webkit-appearance: none; appearance: none;
}
@media (max-width: 1000px) { .comparaisons { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .comparaisons { grid-template-columns: 1fr; } }