/* Atelier Lumière — feuille de style éditoriale noir & blanc */

:root {
  --noir: #111111;
  --noir-doux: #171717;
  --encre: #1d1d1d;
  --gris: #8b8b8b;
  --gris-clair: #b9b9b9;
  --ligne: #2a2a2a;
  --blanc: #f5f2ec;
  --blanc-pur: #ffffff;
  --accent: #d8c7a0;
  --serif: Georgia, 'Times New Roman', Times, serif;
  --sans: system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --pad: clamp(1.25rem, 5vw, 4rem);
  --max: 1180px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--noir);
  color: var(--blanc);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  letter-spacing: 0.01em;
}

h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 400;
  line-height: 1.12;
  letter-spacing: -0.01em;
  margin: 0 0 0.6em;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding-inline: var(--pad); }

.skip {
  position: absolute; left: -999px; top: 0;
  background: var(--blanc); color: var(--noir); padding: 0.6rem 1rem; z-index: 100;
}
.skip:focus { left: 0; }

/* ---------- Boutons ---------- */
.btn {
  display: inline-block;
  font-family: var(--sans);
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.95rem 1.9rem;
  border: 1px solid var(--blanc);
  color: var(--blanc);
  background: transparent;
  cursor: pointer;
  transition: background 0.25s ease, color 0.25s ease;
}
.btn:hover { background: var(--blanc); color: var(--noir); }
.btn-ghost { border-color: var(--ligne); color: var(--gris-clair); }
.btn-ghost:hover { border-color: var(--blanc); background: transparent; color: var(--blanc); }
.btn-plein { width: 100%; background: var(--blanc); color: var(--noir); border-color: var(--blanc); }
.btn-plein:hover { background: var(--accent); border-color: var(--accent); }

.eyebrow {
  font-size: 0.74rem; letter-spacing: 0.28em; text-transform: uppercase;
  color: var(--accent); margin: 0 0 1.1rem;
}

/* ---------- En-tête ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(17, 17, 17, 0.88);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--ligne);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 74px; }
.brand { display: flex; align-items: center; gap: 0.6rem; font-family: var(--serif); font-size: 1.35rem; }
.brand-mark { color: var(--accent); font-size: 1.5rem; }
.brand-text em { font-style: italic; color: var(--accent); }

.nav { display: flex; align-items: center; gap: 1.9rem; }
.nav a { font-size: 0.9rem; color: var(--gris-clair); transition: color 0.2s; }
.nav a:hover { color: var(--blanc); }
.nav-cta { border: 1px solid var(--ligne); padding: 0.5rem 1rem; color: var(--blanc) !important; }
.nav-cta:hover { border-color: var(--accent); }

.burger { display: none; background: none; border: 0; cursor: pointer; width: 34px; height: 26px; padding: 0; }
.burger span { display: block; height: 1.5px; background: var(--blanc); margin: 6px 0; transition: 0.3s; }
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero { padding: clamp(3rem, 9vw, 7rem) 0; border-bottom: 1px solid var(--ligne); }
.hero-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: clamp(2rem, 6vw, 5rem); align-items: center; }
.hero h1 { font-size: clamp(2.4rem, 6vw, 4.5rem); }
.lede { font-size: 1.15rem; color: var(--gris-clair); max-width: 42ch; margin: 1.5rem 0 2.2rem; }
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }

.film-strip { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; padding: 14px; background: var(--noir-doux); border: 1px solid var(--ligne); }
.frame { display: block; aspect-ratio: 3 / 4; border: 1px solid var(--ligne); }
.f1 { background: linear-gradient(135deg, #3a3a3a, #101010); }
.f2 { background: linear-gradient(200deg, #4a463c, #14120c); }
.f3 { background: linear-gradient(160deg, #2c2c2c, #0c0c0c); }
.f4 { background: linear-gradient(300deg, #444, #171717); }

/* ---------- Marquee ---------- */
.strip-marquee { overflow: hidden; border-bottom: 1px solid var(--ligne); background: var(--noir-doux); }
.marquee { display: flex; white-space: nowrap; animation: defile 26s linear infinite; }
.marquee span { font-family: var(--serif); font-style: italic; font-size: 1.5rem; color: var(--gris); padding: 1rem 0; }
@keyframes defile { to { transform: translateX(-50%); } }
@media (prefers-reduced-motion: reduce) { .marquee { animation: none; } }

/* ---------- Sections ---------- */
.section { padding: clamp(3.5rem, 9vw, 6.5rem) 0; border-bottom: 1px solid var(--ligne); }
.section-head { max-width: 60ch; margin-bottom: 3rem; }
.section-head h2 { font-size: clamp(1.9rem, 4.5vw, 3rem); }
.section-sub { color: var(--gris-clair); margin: 0.6rem 0 0; }

/* ---------- Galerie ---------- */
.filtres { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-bottom: 2.2rem; }
.filtre {
  font-family: var(--sans); font-size: 0.78rem; letter-spacing: 0.1em; text-transform: uppercase;
  background: transparent; color: var(--gris-clair); border: 1px solid var(--ligne);
  padding: 0.55rem 1.1rem; cursor: pointer; transition: 0.2s;
}
.filtre:hover { border-color: var(--gris); color: var(--blanc); }
.filtre.est-actif { background: var(--blanc); color: var(--noir); border-color: var(--blanc); }

.grille { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.tuile { margin: 0; }
.tuile-img { aspect-ratio: 4 / 5; border: 1px solid var(--ligne); position: relative; transition: transform 0.4s ease, filter 0.4s ease; filter: grayscale(1) contrast(1.05); }
.tuile:hover .tuile-img { transform: translateY(-4px); filter: grayscale(0.4) contrast(1.1); }
.tuile figcaption { margin-top: 0.7rem; font-size: 0.85rem; color: var(--gris-clair); line-height: 1.4; }
.tag { display: block; font-size: 0.68rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent); margin-bottom: 0.2rem; }

.tuile.t-a .tuile-img { background: radial-gradient(circle at 30% 30%, #4a4a4a, #101010); }
.tuile.t-b .tuile-img { background: linear-gradient(160deg, #52504a, #0e0e0e); }
.tuile.t-c .tuile-img { background: linear-gradient(45deg, #333, #0c0c0c 70%); }
.tuile.t-d .tuile-img { background: radial-gradient(circle at 70% 20%, #3d3d3d, #121212); }
.tuile.t-e .tuile-img { background: linear-gradient(210deg, #55503f, #100f0b); }
.tuile.t-f .tuile-img { background: linear-gradient(120deg, #3a3a3a, #161616); }
.tuile.t-g .tuile-img { background: radial-gradient(circle at 50% 80%, #4b463a, #0d0d0d); }
.tuile.t-h .tuile-img { background: linear-gradient(300deg, #2e2e2e, #0b0b0b); }
.tuile[hidden] { display: none; }
.grille-vide { color: var(--gris); font-style: italic; padding: 2rem 0; }

/* ---------- Prestations ---------- */
.cartes { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.carte { border: 1px solid var(--ligne); padding: 2rem 1.6rem; background: var(--noir-doux); position: relative; }
.carte h3 { font-size: 1.5rem; }
.carte .prix { color: var(--gris-clair); font-size: 0.95rem; margin: 0 0 0.2rem; }
.carte .prix strong { color: var(--blanc); font-size: 1.15rem; }
.carte .duree { color: var(--gris); font-size: 0.85rem; margin: 0 0 1.3rem; padding-bottom: 1.3rem; border-bottom: 1px solid var(--ligne); }
.carte ul { list-style: none; padding: 0; margin: 0; }
.carte li { font-size: 0.92rem; color: var(--gris-clair); padding: 0.35rem 0 0.35rem 1.2rem; position: relative; }
.carte li::before { content: "—"; position: absolute; left: 0; color: var(--accent); }
.carte-phare { border-color: var(--accent); }
.ruban { position: absolute; top: -1px; right: -1px; background: var(--accent); color: var(--noir); font-size: 0.66rem; letter-spacing: 0.12em; text-transform: uppercase; padding: 0.35rem 0.8rem; }

/* ---------- À propos ---------- */
.apropos-grid { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: clamp(2rem, 6vw, 4rem); align-items: center; }
.portrait-cadre { aspect-ratio: 4 / 5; border: 1px solid var(--ligne); background: linear-gradient(160deg, #4a4a4a, #0e0e0e); filter: grayscale(1) contrast(1.1); }
.apropos-copy p { color: var(--gris-clair); }
.chiffres { display: flex; gap: 2.5rem; margin: 2rem 0 0; flex-wrap: wrap; }
.chiffres dt { font-family: var(--serif); font-size: 2rem; color: var(--blanc); }
.chiffres dd { margin: 0; font-size: 0.82rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--gris); }

/* ---------- Témoignages ---------- */
.avis { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.avis blockquote { margin: 0; border-left: 2px solid var(--accent); padding: 0.4rem 0 0.4rem 1.5rem; }
.avis p { font-family: var(--serif); font-style: italic; font-size: 1.12rem; color: var(--blanc); }
.avis footer { color: var(--gris); font-size: 0.85rem; margin-top: 0.8rem; font-style: normal; }

/* ---------- Formulaires ---------- */
.client-grid, .contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 6vw, 4.5rem); align-items: start; }
.carte-form { border: 1px solid var(--ligne); background: var(--noir-doux); padding: clamp(1.6rem, 4vw, 2.4rem); }
.champ { margin-bottom: 1.2rem; }
.champ-duo { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.champ label { display: block; font-size: 0.76rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--gris-clair); margin-bottom: 0.5rem; }
.champ input, .champ select, .champ textarea {
  width: 100%; background: var(--noir); border: 1px solid var(--ligne); color: var(--blanc);
  font-family: var(--sans); font-size: 0.98rem; padding: 0.8rem 0.9rem; transition: border-color 0.2s;
}
.champ input:focus, .champ select:focus, .champ textarea:focus { outline: none; border-color: var(--accent); }
.champ textarea { resize: vertical; }
.champ-ligne { display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.check { display: flex; align-items: center; gap: 0.5rem; text-transform: none; letter-spacing: 0; font-size: 0.85rem; color: var(--gris-clair); }
.check input { width: auto; }
.lien-mineur { font-size: 0.82rem; color: var(--accent); }
.lien-mineur:hover { text-decoration: underline; }
.form-msg { min-height: 1.2em; margin: 1rem 0 0; font-size: 0.9rem; }
.form-msg.err { color: #e5867d; }
.form-msg.ok { color: var(--accent); }
.champ.invalide input, .champ.invalide select, .champ.invalide textarea { border-color: #e5867d; }

/* ---------- Contact ---------- */
.coordonnees { list-style: none; padding: 0; margin: 1.8rem 0 0; }
.coordonnees li { padding: 0.7rem 0; border-bottom: 1px solid var(--ligne); color: var(--blanc); }
.coordonnees li span { display: inline-block; width: 90px; color: var(--gris); font-size: 0.74rem; letter-spacing: 0.14em; text-transform: uppercase; }
.coordonnees a:hover { color: var(--accent); }

/* ---------- Pied de page ---------- */
.site-footer { padding: clamp(2.5rem, 6vw, 4rem) 0 2rem; }
.footer-inner { display: flex; justify-content: space-between; gap: 2rem; flex-wrap: wrap; padding-bottom: 2rem; border-bottom: 1px solid var(--ligne); }
.footer-brand { font-family: var(--serif); font-size: 1.25rem; display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }
.footer-note { width: 100%; font-family: var(--sans); font-size: 0.8rem; color: var(--gris); margin: 0.4rem 0 0; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 1.4rem; align-items: center; }
.footer-nav a { font-size: 0.88rem; color: var(--gris-clair); }
.footer-nav a:hover { color: var(--blanc); }
.footer-bas { padding-top: 1.5rem; }
.footer-bas p { font-size: 0.78rem; color: var(--gris); margin: 0; }

/* ---------- Toast ---------- */
.toast {
  position: fixed; bottom: 1.6rem; left: 50%; transform: translateX(-50%) translateY(1rem);
  background: var(--blanc); color: var(--noir); padding: 0.9rem 1.5rem; font-size: 0.9rem;
  box-shadow: 0 12px 40px rgba(0,0,0,0.5); opacity: 0; transition: opacity 0.3s, transform 0.3s; z-index: 100;
  max-width: 90vw;
}
.toast.visible { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .grille, .cartes { grid-template-columns: repeat(2, 1fr); }
  .avis { grid-template-columns: 1fr; }
  .hero-grid, .apropos-grid, .client-grid, .contact-grid { grid-template-columns: 1fr; }
  .hero-art { order: -1; max-width: 360px; }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .burger { display: block; }
  .nav {
    position: absolute; top: 74px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--noir); border-bottom: 1px solid var(--ligne);
    max-height: 0; overflow: hidden; transition: max-height 0.3s ease;
  }
  .nav.ouvert { max-height: 420px; }
  .nav a { padding: 1rem var(--pad); border-top: 1px solid var(--ligne); }
  .nav-cta { border: 0; }
  .grille { grid-template-columns: 1fr 1fr; }
  .cartes { grid-template-columns: 1fr; }
  .champ-duo { grid-template-columns: 1fr; }
  .chiffres { gap: 1.5rem; }
}