/* CG Drywall — feuille de style unique
   Palette sombre bleu nuit + accent or. Nommage BEM en francais. */

:root {
  --nuit: #0d1520;
  --nuit-2: #111c29;
  --ardoise: #182534;
  --ardoise-clair: #22334699;
  --or: #d4a24c;
  --or-clair: #e8bd6f;
  --texte: #eef2f7;
  --texte-doux: #9fb0c3;
  --bordure: #ffffff14;
  --bordure-forte: #ffffff26;

  --large: 1200px;
  --marge: clamp(1.25rem, 4vw, 2.5rem);
  --rayon: 4px;
  --entete-h: 76px;

  --police: "Helvetica Neue", Helvetica, Arial, "Segoe UI", system-ui, sans-serif;
  --transition: 220ms cubic-bezier(0.4, 0, 0.2, 1);
}

*,
*::before,
*::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--entete-h);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--police);
  font-size: 17px;
  line-height: 1.65;
  color: var(--texte);
  background: var(--nuit);
  overflow-x: hidden;
}

body.est-bloque { overflow: hidden; }

img { max-width: 100%; height: auto; display: block; }

a { color: inherit; text-decoration: none; }

h1, h2, h3 {
  margin: 0;
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.4rem, 6.5vw, 4.25rem); }
h2 { font-size: clamp(1.9rem, 4vw, 2.9rem); }
h3 { font-size: 1.2rem; letter-spacing: -0.01em; }

p { margin: 0 0 1rem; }

:focus-visible {
  outline: 2px solid var(--or);
  outline-offset: 3px;
}

/* --- utilitaires --- */

.enveloppe {
  width: 100%;
  max-width: var(--large);
  margin-inline: auto;
  padding-inline: var(--marge);
}

.surtitre {
  margin: 0 0 0.9rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--or);
}

.or { color: var(--or); }

.saut {
  position: absolute;
  left: -9999px;
  z-index: 100;
  padding: 0.75rem 1.25rem;
  background: var(--or);
  color: var(--nuit);
  font-weight: 700;
}
.saut:focus { left: 1rem; top: 1rem; }

/* --- boutons --- */

.bouton {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.95rem 1.75rem;
  border: 1px solid transparent;
  border-radius: var(--rayon);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
  cursor: pointer;
  transition: background var(--transition), color var(--transition),
              border-color var(--transition), transform var(--transition);
}

.bouton--or {
  background: var(--or);
  color: var(--nuit);
}
.bouton--or:hover { background: var(--or-clair); transform: translateY(-1px); }

.bouton--fantome {
  border-color: var(--bordure-forte);
  color: var(--texte);
  background: transparent;
}
.bouton--fantome:hover { border-color: var(--or); color: var(--or); }

.lien-fleche {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 700;
  color: var(--or);
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: border-color var(--transition), gap var(--transition);
}
.lien-fleche::after { content: "\2192"; transition: transform var(--transition); }
.lien-fleche:hover { border-color: var(--or); }
.lien-fleche:hover::after { transform: translateX(4px); }

/* --- entete --- */

.entete {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  background: #0d1520e6;
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition);
}
.entete.est-defile {
  background: #0b1219f2;
  border-bottom-color: var(--bordure);
}

.entete__barre {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  min-height: var(--entete-h);
}

.marque {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-right: auto;
}
.marque img {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  object-fit: cover;
  flex: none;
}
.marque__texte { display: flex; flex-direction: column; line-height: 1.25; }
.marque__texte strong { font-size: 1.05rem; letter-spacing: 0.01em; }
.marque__texte em {
  font-style: normal;
  font-size: 0.72rem;
  color: var(--texte-doux);
  letter-spacing: 0.04em;
}

.nav { display: flex; gap: 1.75rem; }
.nav a {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--texte-doux);
  padding: 0.4rem 0;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}
.nav a:hover,
.nav a.est-actif { color: var(--texte); border-bottom-color: var(--or); }

.entete__actions { display: flex; align-items: center; gap: 0.9rem; }

.langue {
  display: flex;
  border: 1px solid var(--bordure-forte);
  border-radius: var(--rayon);
  overflow: hidden;
}
.langue button {
  padding: 0.35rem 0.6rem;
  border: 0;
  background: transparent;
  color: var(--texte-doux);
  font: inherit;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}
.langue button.est-actif { background: var(--or); color: var(--nuit); }
.langue button:not(.est-actif):hover { color: var(--texte); }

.entete__tel { padding: 0.6rem 1.1rem; font-size: 0.88rem; }

.burger {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--bordure-forte);
  border-radius: var(--rayon);
  background: transparent;
  cursor: pointer;
}
.burger span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 3.5px auto;
  background: var(--texte);
  transition: transform var(--transition), opacity var(--transition);
}
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

/* --- heros --- */

.heros {
  position: relative;
  display: flex;
  align-items: flex-end;
  min-height: 100svh;
  padding: calc(var(--entete-h) + 4rem) 0 clamp(3rem, 8vh, 6rem);
  isolation: isolate;
}
.heros__image { position: absolute; inset: 0; z-index: -2; }
.heros__image img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 45%; }
.heros::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, #0d1520cc 0%, #0d152066 35%, #0d1520f2 100%),
    linear-gradient(90deg, #0d1520d9 0%, #0d152040 70%);
}
.heros__contenu { max-width: 46rem; }
.heros h1 span { display: block; }
.heros__texte {
  margin: 1.75rem 0 2.25rem;
  font-size: clamp(1.05rem, 1.6vw, 1.2rem);
  color: var(--texte-doux);
  max-width: 34rem;
}
.heros__actions { display: flex; flex-wrap: wrap; gap: 0.9rem; }

/* --- bandeau --- */

.bandeau {
  background: var(--or);
  color: var(--nuit);
}
.bandeau__grille {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  padding-block: 0;
}
.bandeau__grille > div {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 1.6rem 1.25rem;
  border-left: 1px solid #0d152026;
}
.bandeau__grille > div:first-child { border-left: 0; }
.bandeau strong { font-size: 0.95rem; }
.bandeau span { font-size: 0.82rem; opacity: 0.75; }

/* --- sections --- */

.section { padding-block: clamp(4.5rem, 10vw, 7.5rem); }
.section--sombre { background: var(--nuit-2); }

.section__entete { max-width: 46rem; margin-bottom: clamp(2.5rem, 5vw, 4rem); }
.section__intro { margin-top: 1.25rem; color: var(--texte-doux); font-size: 1.05rem; }

/* --- cartes services --- */

.cartes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.25rem;
}
.carte {
  position: relative;
  padding: 2.25rem 1.75rem 1.75rem;
  background: var(--ardoise);
  border: 1px solid var(--bordure);
  border-radius: var(--rayon);
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition);
}
.carte::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--or);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition);
}
.carte:hover { border-color: var(--bordure-forte); transform: translateY(-3px); }
.carte:hover::before { transform: scaleY(1); }
.carte__numero {
  display: block;
  margin-bottom: 0.9rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--or);
}
.carte h3 { margin-bottom: 0.75rem; }
.carte p { margin: 0; color: var(--texte-doux); font-size: 0.95rem; }

/* --- galerie --- */

.galerie {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 200px;
  gap: 0.75rem;
}
.galerie__item {
  position: relative;
  padding: 0;
  border: 0;
  border-radius: var(--rayon);
  overflow: hidden;
  cursor: zoom-in;
  background: var(--ardoise);
}
.galerie__item--large { grid-row: span 2; grid-column: span 2; }
.galerie__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 500ms cubic-bezier(0.4, 0, 0.2, 1), filter var(--transition);
  filter: saturate(0.9);
}
.galerie__item::after {
  content: "";
  position: absolute;
  inset: 0;
  box-shadow: inset 0 0 0 1px var(--bordure);
  transition: box-shadow var(--transition);
}
.galerie__item:hover img { transform: scale(1.05); filter: saturate(1.05); }
.galerie__item:hover::after { box-shadow: inset 0 0 0 2px var(--or); }

/* --- etapes --- */

.etapes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 2rem 1.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}
.etapes li { position: relative; padding-top: 2rem; border-top: 1px solid var(--bordure); }
.etapes__numero {
  position: absolute;
  top: -0.9rem;
  left: 0;
  display: grid;
  place-items: center;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 50%;
  background: var(--or);
  color: var(--nuit);
  font-size: 0.85rem;
  font-weight: 700;
}
.etapes h3 { margin-bottom: 0.6rem; }
.etapes p { margin: 0; color: var(--texte-doux); font-size: 0.95rem; }

/* --- a propos --- */

.apropos {
  padding-block: clamp(4.5rem, 10vw, 7.5rem);
  background:
    linear-gradient(180deg, var(--nuit) 0%, var(--nuit-2) 100%);
}
.apropos__grille {
  display: grid;
  grid-template-columns: 0.85fr 1fr;
  align-items: center;
  gap: clamp(2rem, 5vw, 4.5rem);
}
.apropos__image { margin: 0; }
.apropos__image img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: var(--rayon);
  border: 1px solid var(--bordure);
}
.apropos__texte p { color: var(--texte-doux); }
.apropos__texte h2 { margin-bottom: 1.5rem; }

/* --- villes --- */

.villes {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 0.6rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.villes li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.1rem;
  background: var(--ardoise);
  border: 1px solid var(--bordure);
  border-radius: var(--rayon);
  font-size: 0.92rem;
  font-weight: 600;
}
.villes li::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--or);
  flex: none;
}

/* --- contact --- */

.contact { padding-block: clamp(4.5rem, 10vw, 7.5rem); background: var(--nuit); }
.contact__grille {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2.5rem, 5vw, 4.5rem);
  align-items: start;
}
.contact__texte p { color: var(--texte-doux); }
.contact__texte h2 { margin-bottom: 1.25rem; }

.coordonnees {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.5rem;
  margin: 2.5rem 0 0;
}
.coordonnees dt {
  margin-bottom: 0.3rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--or);
}
.coordonnees dd { margin: 0; font-size: 0.98rem; word-break: break-word; }
.coordonnees__note {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.86rem;
  color: var(--texte-doux);
}
.coordonnees a { border-bottom: 1px solid var(--bordure-forte); transition: border-color var(--transition); }
.coordonnees a:hover { border-bottom-color: var(--or); }

.formulaire {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.1rem;
  padding: clamp(1.5rem, 3vw, 2.25rem);
  background: var(--ardoise);
  border: 1px solid var(--bordure);
  border-radius: var(--rayon);
}
.champ { display: flex; flex-direction: column; gap: 0.4rem; }
.champ--large { grid-column: 1 / -1; }
.champ label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--texte-doux);
}
.champ input,
.champ select,
.champ textarea {
  width: 100%;
  padding: 0.8rem 0.9rem;
  border: 1px solid var(--bordure-forte);
  border-radius: var(--rayon);
  background: #0d1520;
  color: var(--texte);
  font: inherit;
  font-size: 0.95rem;
  transition: border-color var(--transition);
}
.champ textarea { resize: vertical; min-height: 120px; }
.champ input:focus,
.champ select:focus,
.champ textarea:focus { border-color: var(--or); outline: none; }
.champ input.est-invalide,
.champ textarea.est-invalide { border-color: #e06b5c; }

.formulaire .bouton { grid-column: 1 / -1; }
.formulaire__note {
  grid-column: 1 / -1;
  margin: -0.4rem 0 0;
  font-size: 0.8rem;
  color: var(--texte-doux);
  text-align: center;
}

/* --- pied --- */

.pied {
  padding-top: clamp(3rem, 6vw, 4.5rem);
  background: var(--nuit-2);
  border-top: 1px solid var(--bordure);
}
.pied__grille {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 2rem;
  padding-bottom: 2.5rem;
}
.pied__marque { display: flex; align-items: center; gap: 0.85rem; }
.pied__marque img { width: 46px; height: 46px; border-radius: 50%; object-fit: cover; }
.pied__marque div { display: flex; flex-direction: column; line-height: 1.35; }
.pied__marque span { font-size: 0.8rem; color: var(--texte-doux); }
.pied__liens { display: flex; flex-wrap: wrap; gap: 1.25rem; font-size: 0.9rem; color: var(--texte-doux); }
.pied__liens a:hover { color: var(--or); }
.pied__mention { margin: 0; font-size: 0.88rem; color: var(--texte-doux); text-align: right; }
.pied__mention a { color: var(--texte); }
.pied__bas {
  margin: 0;
  padding: 1.25rem var(--marge);
  border-top: 1px solid var(--bordure);
  font-size: 0.8rem;
  color: var(--texte-doux);
  text-align: center;
}

/* --- visionneuse --- */

.visionneuse {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1rem;
  padding: clamp(1rem, 4vw, 3rem);
  background: #060a10f5;
  backdrop-filter: blur(6px);
  animation: apparait 200ms ease;
}
.visionneuse[hidden] { display: none; }
@keyframes apparait { from { opacity: 0; } to { opacity: 1; } }

.visionneuse figure {
  grid-column: 2;
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  min-height: 0;
}
.visionneuse img {
  max-width: 100%;
  max-height: 78vh;
  object-fit: contain;
  border-radius: var(--rayon);
}
.visionneuse figcaption {
  font-size: 0.9rem;
  color: var(--texte-doux);
  text-align: center;
}

.visionneuse__fermer,
.visionneuse__nav {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border: 1px solid var(--bordure-forte);
  border-radius: 50%;
  background: #ffffff0f;
  color: var(--texte);
  font-size: 1.6rem;
  line-height: 1;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}
.visionneuse__fermer:hover,
.visionneuse__nav:hover { background: var(--or); color: var(--nuit); }
.visionneuse__fermer {
  position: absolute;
  top: clamp(1rem, 3vw, 2rem);
  right: clamp(1rem, 3vw, 2rem);
  font-size: 1.9rem;
}
.visionneuse__nav--prec { grid-column: 1; }
.visionneuse__nav--suiv { grid-column: 3; }

/* --- appel flottant --- */

.appel-flottant {
  position: fixed;
  right: 1.1rem;
  bottom: 1.1rem;
  z-index: 40;
  display: none;
  place-items: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--or);
  color: var(--nuit);
  font-size: 1.5rem;
  box-shadow: 0 8px 24px #0006;
}

/* --- animations d'entree --- */

.a-reveler {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 600ms ease, transform 600ms ease;
}
.a-reveler.est-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .a-reveler { opacity: 1; transform: none; }
}

/* --- responsive --- */

@media (max-width: 1024px) {
  .bandeau__grille { grid-template-columns: repeat(2, 1fr); }
  .bandeau__grille > div:nth-child(odd) { border-left: 0; }
  .bandeau__grille > div:nth-child(n + 3) { border-top: 1px solid #0d152026; }
  .galerie { grid-template-columns: repeat(2, 1fr); grid-auto-rows: 180px; }
  .apropos__grille { grid-template-columns: 1fr; }
  .apropos__image img { aspect-ratio: 16 / 10; }
  .contact__grille { grid-template-columns: 1fr; }
  .pied__grille { grid-template-columns: 1fr; text-align: left; }
  .pied__mention { text-align: left; }
}

@media (max-width: 860px) {
  .nav {
    position: fixed;
    inset: var(--entete-h) 0 auto;
    flex-direction: column;
    gap: 0;
    padding: 1rem var(--marge) 2rem;
    background: var(--nuit);
    border-bottom: 1px solid var(--bordure);
    transform: translateY(-120%);
    visibility: hidden;
    transition: transform var(--transition), visibility var(--transition);
  }
  .nav.est-ouvert { transform: none; visibility: visible; }
  .nav a {
    padding: 0.95rem 0;
    font-size: 1.05rem;
    border-bottom: 1px solid var(--bordure);
  }
  .nav a:hover, .nav a.est-actif { border-bottom-color: var(--bordure); color: var(--or); }
  .burger { display: block; }
  .entete__tel { display: none; }
  .marque__texte em { display: none; }
  .appel-flottant { display: grid; }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .bandeau__grille { grid-template-columns: 1fr; }
  .bandeau__grille > div { border-left: 0; }
  .bandeau__grille > div + div { border-top: 1px solid #0d152026; }
  .galerie { grid-template-columns: 1fr; grid-auto-rows: 240px; }
  .galerie__item--large { grid-row: span 1; grid-column: span 1; }
  .formulaire { grid-template-columns: 1fr; }
  .heros__actions .bouton { flex: 1 1 100%; }
  .visionneuse { grid-template-columns: 1fr; }
  .visionneuse figure { grid-column: 1; }
  .visionneuse__nav--prec { grid-column: 1; grid-row: 2; justify-self: start; }
  .visionneuse__nav--suiv { grid-column: 1; grid-row: 2; justify-self: end; }
}