/* Démonstration privée — Toitures Arbelle (entreprise fictive) */
@font-face {
  font-family: "Instrument Sans";
  src: url("assets/instrument.woff2") format("woff2");
  font-weight: 400 700;
  font-display: swap;
}

:root {
  --ardoise: #1f2a33;
  --ardoise-2: #2c3a45;
  --zinc: #6b7a86;
  --pierre: #f5f2ec;
  --pierre-2: #ebe6dd;
  --blanc: #ffffff;
  --tuile: #a9512f;
  --tuile-fonce: #8c3f22;
  --texte: #1c242b;
  --texte-doux: #4c5862;
  --rayon: 14px;
  --ombre: 0 18px 40px -24px rgba(20, 30, 38, .45);
  --largeur: 1180px;
  --entete: 72px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Instrument Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.6;
  color: var(--texte);
  background: var(--pierre);
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
h1, h2, h3 { line-height: 1.15; letter-spacing: -0.015em; margin: 0 0 .5em; }
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); font-weight: 650; }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.5rem); font-weight: 620; }
h3 { font-size: 1.22rem; font-weight: 620; }
p { margin: 0 0 1em; }
.conteneur { width: min(var(--largeur), 100% - 40px); margin-inline: auto; }
.surtitre { text-transform: uppercase; letter-spacing: .14em; font-size: .78rem; font-weight: 650; color: var(--tuile); margin-bottom: .8em; }
.doux { color: var(--texte-doux); }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* Lien d'évitement */
.evitement { position: absolute; left: 12px; top: -60px; background: var(--ardoise); color: #fff; padding: 10px 14px; border-radius: 8px; z-index: 100; }
.evitement:focus { top: 12px; }
:focus-visible { outline: 3px solid var(--tuile); outline-offset: 3px; }

/* Bandeau de démonstration */
.bandeau-demo {
  background: #f1d9a8; color: #3b2a10; font-size: .86rem; text-align: center;
  padding: 8px 16px; line-height: 1.4;
}
.bandeau-demo strong { font-weight: 700; }

/* En-tête */
.entete {
  position: sticky; top: 0; z-index: 50;
  background: rgba(245, 242, 236, .92);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid rgba(31, 42, 51, .08);
}
.entete .conteneur { display: flex; align-items: center; justify-content: space-between; height: var(--entete); gap: 20px; }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 680; font-size: 1.12rem; color: var(--ardoise); }
.logo svg { width: 34px; height: 34px; }
.logo small { display: block; font-weight: 500; font-size: .74rem; color: var(--texte-doux); letter-spacing: .02em; }
.nav { display: flex; align-items: center; gap: 6px; }
.nav a { text-decoration: none; padding: 8px 12px; border-radius: 8px; font-weight: 550; font-size: .97rem; color: var(--ardoise-2); transition: background .2s, color .2s; }
.nav a:hover { background: var(--pierre-2); }
.nav a[aria-current="page"] { color: var(--tuile); }
.entete-actions { display: flex; align-items: center; gap: 10px; }
.tel-entete { text-decoration: none; font-weight: 650; color: var(--ardoise); white-space: nowrap; display: inline-flex; align-items: center; gap: 8px; }
.tel-entete svg { width: 18px; height: 18px; color: var(--tuile); }
.menu-bouton { display: none; background: none; border: 1px solid rgba(31,42,51,.2); border-radius: 10px; width: 46px; height: 46px; cursor: pointer; color: var(--ardoise); }
.menu-bouton svg { width: 22px; height: 22px; }

/* Boutons */
.bouton {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 50px; padding: 12px 22px; border-radius: 999px;
  font: inherit; font-weight: 650; font-size: 1rem; text-decoration: none; cursor: pointer;
  border: 1.5px solid transparent; transition: transform .2s ease, background .2s, box-shadow .2s, color .2s;
}
.bouton svg { width: 19px; height: 19px; flex: none; }
.bouton-principal { background: var(--tuile); color: #fff; box-shadow: 0 10px 24px -14px rgba(169, 81, 47, .9); }
.bouton-principal:hover { background: var(--tuile-fonce); transform: translateY(-1px); }
.bouton-clair { background: rgba(255,255,255,.12); color: #fff; border-color: rgba(255,255,255,.55); }
.bouton-clair:hover { background: rgba(255,255,255,.22); }
.bouton-contour { color: var(--ardoise); border-color: rgba(31,42,51,.3); background: transparent; }
.bouton-contour:hover { background: var(--pierre-2); }

/* Héros */
.heros { position: relative; min-height: min(86vh, 760px); display: flex; align-items: flex-end; color: #fff; overflow: hidden; }
.heros-image { position: absolute; inset: 0; }
.heros-image img { width: 100%; height: 100%; object-fit: cover; transform: scale(1.06); animation: zoom-doux 14s ease-out forwards; }
.heros::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(18,26,32,.2) 0%, rgba(18,26,32,.35) 40%, rgba(18,26,32,.86) 100%); }
.heros .conteneur { position: relative; z-index: 1; padding: 120px 0 64px; }
.heros h1 { max-width: 15ch; }
.heros p.chapeau { font-size: clamp(1.05rem, 1.6vw, 1.25rem); max-width: 54ch; color: rgba(255,255,255,.9); }
.heros .actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.heros .surtitre { color: #f0b08f; }
@keyframes zoom-doux { to { transform: scale(1); } }

.reperes { display: flex; flex-wrap: wrap; gap: 10px 26px; margin-top: 34px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.22); font-size: .95rem; color: rgba(255,255,255,.88); }
.reperes span { display: inline-flex; align-items: center; gap: 8px; }
.reperes svg { width: 18px; height: 18px; color: #f0b08f; }

/* Sections */
.section { padding: clamp(64px, 9vw, 112px) 0; }
.section-sombre { background: var(--ardoise); color: #e8edf1; }
.section-sombre .doux { color: #b5c1ca; }
.section-sombre .surtitre { color: #f0b08f; }
.section-claire { background: var(--blanc); }
.titre-section { max-width: 720px; margin-bottom: 40px; }

/* Page d'en-tête intérieure */
.entete-page { position: relative; color: #fff; padding: clamp(90px, 12vw, 150px) 0 clamp(48px, 6vw, 72px); overflow: hidden; }
.entete-page img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.entete-page::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(18,26,32,.45), rgba(18,26,32,.85)); }
.entete-page .conteneur { position: relative; z-index: 1; }
.entete-page p { max-width: 60ch; color: rgba(255,255,255,.9); font-size: 1.1rem; }
.entete-page .surtitre { color: #f0b08f; }

/* Cartes prestations */
.grille-prestations { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.carte { background: var(--blanc); border-radius: var(--rayon); overflow: hidden; box-shadow: var(--ombre); display: flex; flex-direction: column; transition: transform .35s ease, box-shadow .35s ease; text-decoration: none; color: inherit; }
.carte:hover { transform: translateY(-4px); box-shadow: 0 26px 50px -26px rgba(20,30,38,.55); }
.carte figure { margin: 0; aspect-ratio: 4 / 3; overflow: hidden; }
.carte figure img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s ease; }
.carte:hover figure img { transform: scale(1.04); }
.carte .corps { padding: 20px 22px 24px; }
.carte p { color: var(--texte-doux); margin: 0; font-size: .98rem; }
.carte .lien { display: inline-flex; gap: 6px; margin-top: 14px; font-weight: 650; color: var(--tuile); }

/* Démarche */
.etapes { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: etape; list-style: none; padding: 0; margin: 0; }
.etapes li { background: var(--ardoise-2); border-radius: var(--rayon); padding: 24px 22px; position: relative; }
.etapes li::before { counter-increment: etape; content: "0" counter(etape); display: block; font-weight: 700; color: #f0b08f; font-size: .95rem; margin-bottom: 12px; letter-spacing: .08em; }
.etapes p { margin: 0; color: #c3ced6; font-size: .97rem; }

/* Bloc image + texte */
.duo { display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(28px, 5vw, 64px); align-items: center; }
.duo figure { margin: 0; border-radius: var(--rayon); overflow: hidden; box-shadow: var(--ombre); aspect-ratio: 5 / 4; }
.duo figure img { width: 100%; height: 100%; object-fit: cover; }
.liste-coches { list-style: none; padding: 0; margin: 18px 0 26px; display: grid; gap: 10px; }
.liste-coches li { display: flex; gap: 12px; align-items: flex-start; }
.liste-coches svg { width: 20px; height: 20px; color: var(--tuile); flex: none; margin-top: 4px; }

/* Réalisations */
.filtres { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 28px; }
.filtre { font: inherit; font-weight: 600; font-size: .95rem; padding: 9px 16px; min-height: 44px; border-radius: 999px; border: 1.5px solid rgba(31,42,51,.2); background: transparent; cursor: pointer; color: var(--ardoise-2); transition: background .2s, color .2s, border-color .2s; }
.filtre[aria-pressed="true"] { background: var(--ardoise); color: #fff; border-color: var(--ardoise); }
.galerie { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.realisation { margin: 0; background: var(--blanc); border-radius: var(--rayon); overflow: hidden; box-shadow: var(--ombre); }
.realisation[hidden] { display: none; }
.realisation button { all: unset; display: block; width: 100%; cursor: zoom-in; aspect-ratio: 4 / 3; overflow: hidden; }
.realisation button:focus-visible { outline: 3px solid var(--tuile); outline-offset: -3px; }
.realisation img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s ease; }
.realisation:hover img { transform: scale(1.04); }
.realisation figcaption { padding: 16px 18px 18px; }
.realisation figcaption strong { display: block; font-size: 1.04rem; }
.realisation figcaption span { color: var(--texte-doux); font-size: .92rem; }
.etiquette { display: inline-block; font-size: .74rem; font-weight: 650; letter-spacing: .06em; text-transform: uppercase; color: var(--tuile); margin-bottom: 4px; }

/* Visionneuse */
.visionneuse { border: none; padding: 0; background: transparent; max-width: min(1100px, 94vw); width: 100%; }
.visionneuse::backdrop { background: rgba(12, 18, 22, .86); }
.visionneuse img { width: 100%; max-height: 80vh; object-fit: contain; border-radius: 10px; }
.visionneuse p { color: #e6ebef; text-align: center; margin: 12px 0 0; }
.visionneuse .fermer { position: absolute; top: -52px; right: 0; background: rgba(255,255,255,.14); color: #fff; border: none; border-radius: 999px; width: 44px; height: 44px; font-size: 1.4rem; cursor: pointer; }

/* Entreprise */
.valeurs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.valeur { background: var(--blanc); border-radius: var(--rayon); padding: 26px; box-shadow: var(--ombre); }
.valeur svg { width: 28px; height: 28px; color: var(--tuile); margin-bottom: 14px; }
.a-completer { border: 1.5px dashed rgba(169,81,47,.55); background: #fbf3ee; border-radius: var(--rayon); padding: 22px 24px; }
.a-completer h3 { color: var(--tuile-fonce); }
.a-completer ul { margin: 0; padding-left: 20px; color: var(--texte-doux); }

/* Contact */
.contact-grille { display: grid; grid-template-columns: 1.2fr .8fr; gap: clamp(24px, 4vw, 48px); align-items: start; }
.formulaire { background: var(--blanc); border-radius: var(--rayon); padding: clamp(22px, 4vw, 36px); box-shadow: var(--ombre); }
.champ { display: grid; gap: 6px; margin-bottom: 16px; }
.champ label, .champ legend { font-weight: 600; font-size: .95rem; }
.champ input, .champ select, .champ textarea {
  font: inherit; font-size: 16px; padding: 12px 14px; border-radius: 10px;
  border: 1.5px solid #cdd3d8; background: #fbfaf8; color: var(--texte); min-height: 48px; width: 100%;
}
.champ textarea { min-height: 120px; resize: vertical; }
.champ input:focus, .champ select:focus, .champ textarea:focus { border-color: var(--ardoise-2); outline: none; box-shadow: 0 0 0 3px rgba(169,81,47,.25); }
.champ .aide { font-size: .85rem; color: var(--texte-doux); }
.champ [aria-invalid="true"] { border-color: #b3261e; }
.erreur { color: #b3261e; font-size: .88rem; line-height: 1.35; min-height: 1.35em; display: block; }
.deux-colonnes { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
fieldset.champ { border: none; padding: 0; margin: 0 0 16px; }
.choix { display: flex; flex-wrap: wrap; gap: 8px; }
.choix label { display: inline-flex; align-items: center; gap: 8px; border: 1.5px solid #cdd3d8; border-radius: 999px; padding: 8px 14px; min-height: 44px; cursor: pointer; font-weight: 550; background: #fbfaf8; }
.choix input { accent-color: var(--tuile); width: 18px; height: 18px; min-height: 0; padding: 0; margin: 0; flex: none; }
.message-demo { margin-top: 16px; padding: 14px 16px; border-radius: 10px; background: #eef4ec; color: #22401c; display: none; }
.message-demo.visible { display: block; }
.coordonnees { background: var(--ardoise); color: #e8edf1; border-radius: var(--rayon); padding: 28px; }
.coordonnees a { color: #fff; }
.coordonnees .surtitre { color: #f0b08f; }
.coordonnees .doux { color: #b5c1ca; }
.coordonnees .grand-tel { display: flex; align-items: center; gap: 10px; font-size: 1.45rem; font-weight: 680; text-decoration: none; margin: 8px 0 4px; }
.coordonnees .grand-tel svg { width: 24px; height: 24px; color: #f0b08f; }
.coordonnees dl { margin: 20px 0 0; display: grid; gap: 14px; }
.coordonnees dt { font-size: .8rem; text-transform: uppercase; letter-spacing: .1em; color: #9fb0bc; }
.coordonnees dd { margin: 2px 0 0; }

/* Appel à l'action final */
.appel { background: linear-gradient(120deg, var(--ardoise) 0%, var(--ardoise-2) 100%); color: #fff; border-radius: 20px; padding: clamp(30px, 5vw, 56px); display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 24px; }
.appel h2 { margin: 0 0 6px; }
.appel p { margin: 0; color: #c3ced6; }
.appel .actions { display: flex; flex-wrap: wrap; gap: 12px; }

/* Pied de page */
.pied { background: #161e24; color: #aab7c1; padding: 56px 0 120px; font-size: .94rem; }
.pied .colonnes { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 32px; }
.pied h3 { color: #fff; font-size: 1rem; }
.pied a { color: #dfe6eb; text-decoration: none; }
.pied a:hover { text-decoration: underline; }
.pied ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.pied .mention { margin-top: 36px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.1); font-size: .84rem; color: #8494a0; }

/* Barre d'appel mobile */
.barre-mobile { display: none; }

/* Apparitions discrètes */
.revele { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.revele.visible { opacity: 1; transform: none; }
.js-off .revele { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .revele { opacity: 1; transform: none; }
  .heros-image img { transform: none; }
}

/* Tablette */
@media (max-width: 980px) {
  .grille-prestations, .galerie, .valeurs { grid-template-columns: repeat(2, 1fr); }
  .etapes { grid-template-columns: repeat(2, 1fr); }
  .duo, .contact-grille { grid-template-columns: 1fr; }
  .pied .colonnes { grid-template-columns: 1fr 1fr; }
}

/* Téléphone */
@media (max-width: 760px) {
  body { font-size: 16px; }
  :root { --entete: 64px; }
  .menu-bouton { display: inline-grid; place-items: center; }
  .tel-entete .numero { display: none; }
  .tel-entete { width: 46px; height: 46px; justify-content: center; border-radius: 10px; background: var(--tuile); color: #fff; }
  .tel-entete svg { color: #fff; width: 20px; height: 20px; }
  .logo small { font-size: .7rem; white-space: nowrap; }
  .nav { position: absolute; top: 100%; left: 0; right: 0; max-height: calc(100vh - var(--entete)); overflow-y: auto; flex-direction: column; align-items: stretch; gap: 0; background: var(--pierre); padding: 8px 20px 20px; border-bottom: 1px solid rgba(31,42,51,.12); box-shadow: 0 20px 30px -20px rgba(0,0,0,.3); display: none; }
  .nav.ouvert { display: flex; }
  .nav a { padding: 14px 6px; font-size: 1.08rem; border-bottom: 1px solid rgba(31,42,51,.08); border-radius: 0; }
  .grille-prestations, .galerie, .valeurs, .etapes, .deux-colonnes, .pied .colonnes { grid-template-columns: 1fr; }
  .heros { min-height: 88vh; }
  .heros .conteneur { padding: 100px 0 44px; }
  .heros .actions .bouton { flex: 1 1 100%; }
  .barre-mobile {
    display: grid; grid-template-columns: 1.3fr 1fr; gap: 10px;
    position: fixed; left: 0; right: 0; bottom: 0; z-index: 60;
    padding: 10px 14px calc(10px + env(safe-area-inset-bottom));
    background: rgba(22, 30, 36, .96); backdrop-filter: blur(8px);
    box-shadow: 0 -10px 30px -16px rgba(0,0,0,.5);
  }
  .barre-mobile .bouton { min-height: 54px; font-size: 1.04rem; padding: 10px 14px; }
  .pied { padding-bottom: 130px; }
}
@media (max-width: 400px) {
  .logo small { display: none; }
}

/* Téléphone non renseigné : liens d'appel désactivés */
[aria-disabled="true"].bouton, [aria-disabled="true"].tel-entete, [aria-disabled="true"].grand-tel { cursor: not-allowed; opacity: .62; }
[aria-disabled="true"].bouton:hover { transform: none; }
.bouton-principal[aria-disabled="true"]:hover { background: var(--tuile); }
.bouton-clair[aria-disabled="true"]:hover { background: rgba(255,255,255,.12); }
.barre-mobile .bouton[aria-disabled="true"] { font-size: .9rem; white-space: nowrap; gap: 6px; padding-inline: 8px; }

/* Un chantier, étape par étape (chantier fictif) */
.avertissement-fictif { background: #f1d9a8; color: #3b2a10; border-radius: 10px; padding: 12px 16px; margin: 0 0 28px; font-size: .95rem; line-height: 1.5; }
.chantier { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.etape-chantier { background: var(--pierre); border-radius: var(--rayon); overflow: hidden; display: flex; flex-direction: column; box-shadow: var(--ombre); }
.etape-chantier figure { margin: 0; position: relative; aspect-ratio: 4 / 3; overflow: hidden; }
.etape-chantier img { width: 100%; height: 100%; object-fit: cover; }
.etape-chantier figcaption { position: absolute; left: 10px; bottom: 10px; background: rgba(18, 26, 32, .8); color: #fff; font-size: .78rem; font-weight: 600; padding: 4px 10px; border-radius: 999px; }
.etape-chantier .texte { padding: 20px 22px 24px; }
.etape-num { display: block; font-size: .78rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--tuile); margin-bottom: 8px; }
.etape-chantier p { margin: 0; color: var(--texte-doux); font-size: .98rem; }
.mention-chantier { margin: 22px 0 0; font-size: .92rem; }
@media (max-width: 980px) {
  .chantier { grid-template-columns: 1fr; gap: 16px; }
  .etape-chantier figure { aspect-ratio: 16 / 9; }
}