/* Feuille de style — Studio One landing page.
   Palette et typographie reprises de la maquette validée sur Claude Design. */

:root {
  --ink: #1B1712;
  --ink-soft: #4A443C;
  --paper: #FAF6EF;
  --sand: #E9DFCF;
  --sand-deep: #D8C9AE;
  --terracotta: #BE6239;
  --terracotta-deep: #9C4C2A;
  --line: #DCD0BC;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Manrope', system-ui, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.5;
}

h1, h2, .serif { font-family: 'Spectral', Georgia, serif; }

a { color: var(--terracotta); text-decoration: none; }
a:hover { color: var(--terracotta-deep); }

.container { max-width: 1180px; margin: 0 auto; padding: 0 6vw; }
.container.narrow { max-width: 780px; }

.section { padding: 96px 0; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 40;
  background: rgba(250,246,239,0.92); backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 18px 6vw; }
.logo { font-family: 'Spectral', serif; font-size: 21px; font-weight: 600; letter-spacing: 0.02em; }
.main-nav { display: flex; gap: 32px; font-size: 14px; font-weight: 600; }
.main-nav a { color: var(--ink-soft); }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 16px 30px; border-radius: 999px; font-weight: 600; font-size: 15px; cursor: pointer; border: none; transition: transform .15s ease, background .15s ease, color .15s ease; }
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { background: var(--terracotta-deep); transform: translateY(-1px); color: var(--paper); }
.btn-ghost { background: transparent; color: var(--ink); border: 1.5px solid var(--ink); }
.btn-ghost:hover { background: var(--ink); color: var(--paper); }
.btn-small { padding: 12px 22px; font-size: 14px; }
.btn-full { width: 100%; }

.eyebrow { text-transform: uppercase; letter-spacing: 0.14em; font-size: 12px; font-weight: 700; color: var(--terracotta-deep); margin: 0 0 14px; }
.section-title { font-size: 36px; font-weight: 500; line-height: 1.2; margin: 0 0 40px; max-width: 640px; }
.body-text { font-size: 17px; line-height: 1.7; color: var(--ink-soft); }

/* Hero */
.hero { padding-top: 64px; padding-bottom: 64px; }
.hero-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 56px; align-items: center; }
.hero h1 { font-size: 52px; line-height: 1.08; font-weight: 500; margin: 0 0 24px; }
.hero-lead { font-size: 18px; line-height: 1.6; color: var(--ink-soft); max-width: 500px; margin: 0 0 20px; }
.hero-sub { font-size: 15px; line-height: 1.6; color: var(--ink-soft); max-width: 480px; margin: 0 0 32px; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; margin-bottom: 16px; }
.reassurance { font-size: 13px; color: var(--ink-soft); }
.hero-visual { position: relative; aspect-ratio: 4/5; border-radius: 24px; overflow: hidden; background: var(--sand-deep); }
.hero-slide { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; animation: heroFade 16s infinite; }
.hero-slide:nth-child(1) { animation-delay: 0s; }
.hero-slide:nth-child(2) { animation-delay: 4s; }
.hero-slide:nth-child(3) { animation-delay: 8s; }
.hero-slide:nth-child(4) { animation-delay: 12s; }
@keyframes heroFade { 0% { opacity: 0; } 6% { opacity: 1; } 22% { opacity: 1; } 28% { opacity: 0; } 100% { opacity: 0; } }

/* Concept */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.feature-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 18px; }
.feature-list li { padding: 16px 0 0; border-top: 2px solid var(--ink); display: flex; flex-direction: column; gap: 6px; }
.feature-list span { font-size: 14px; color: var(--ink-soft); line-height: 1.6; }
.image-frame { border-radius: 20px; overflow: hidden; }
.image-frame img { width: 100%; height: 100%; object-fit: cover; display: block; }
.ratio-4-5 { aspect-ratio: 4/5; }

/* Grids */
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0,1fr)); gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0,1fr)); }

/* Metiers */
.card { background: var(--paper); border: 1px solid var(--line); border-radius: 18px; padding: 28px; transition: box-shadow .2s ease, transform .2s ease; }
.card:hover { box-shadow: 0 18px 40px rgba(27,23,18,0.08); transform: translateY(-2px); }
.metier-card { text-align: center; }
.icon-badge { width: 48px; height: 48px; border-radius: 999px; background: var(--sand); display: flex; align-items: center; justify-content: center; margin: 0 auto 14px; color: var(--terracotta-deep); }
.metier-label { font-weight: 700; font-size: 14.5px; }

/* Avantages */
.adv-card { padding: 22px; border: 1px solid var(--line); border-radius: 16px; }
#avantages .adv-card { border-color: rgba(250,246,239,0.15); }
.adv-card strong { display: block; margin-bottom: 8px; font-size: 15px; }
.adv-card p { margin: 0; font-size: 13.5px; line-height: 1.6; color: var(--ink-soft); }
#avantages .adv-card p { color: rgba(250,246,239,0.72); }

/* Comparaison */
.compare-col { border-radius: 18px; padding: 30px; }
.compare-traditional { background: var(--paper); border: 1.5px solid var(--line); }
.compare-studioone { background: var(--ink); color: var(--paper); }
.compare-title { font-family: 'Spectral', serif; font-weight: 600; font-size: 18px; margin-bottom: 18px; }
.compare-traditional .compare-title { color: var(--ink-soft); }
.compare-row { display: flex; gap: 10px; align-items: flex-start; margin-bottom: 14px; font-size: 14.5px; }
.compare-traditional .compare-row { color: var(--ink-soft); }
.icon-x { color: #A69A85; flex-shrink: 0; }
.icon-check { color: var(--terracotta); flex-shrink: 0; }

/* Fonctionnement */
.step-card { }
.step-number { font-family: 'Spectral', serif; font-size: 34px; color: var(--terracotta); margin-bottom: 10px; }
.step-card strong { display: block; margin-bottom: 8px; font-size: 15px; }
.step-card p { margin: 0; font-size: 13.5px; color: var(--ink-soft); line-height: 1.6; }

/* Projection */
.projection { position: relative; padding: 0; min-height: 420px; display: flex; align-items: center; overflow: hidden; }
.projection > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.projection-overlay { position: absolute; inset: 0; background: rgba(27,23,18,0.72); }
.projection-content { position: relative; text-align: center; padding: 96px 6vw; color: var(--paper); }
.projection-quote { font-family: 'Spectral', serif; font-size: 26px; font-style: italic; line-height: 1.55; margin: 0 0 24px; }
.projection-note { font-size: 13.5px; color: rgba(250,246,239,0.75); margin: 0; }

/* FAQ */
.faq-list { display: flex; flex-direction: column; }
.faq-item { border-bottom: 1px solid var(--line); padding: 18px 0; }
.faq-item summary { font-weight: 700; font-size: 15.5px; cursor: pointer; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '+'; float: right; color: var(--terracotta-deep); font-size: 20px; }
.faq-item[open] summary::after { content: '\2212'; }
.faq-item p { font-size: 14.5px; color: var(--ink-soft); line-height: 1.65; margin: 12px 0 0; max-width: 620px; }

/* Formulaire */
.progress-bar { display: flex; gap: 6px; margin-bottom: 32px; }
.progress-seg { height: 4px; flex: 1; border-radius: 4px; background: var(--line); }
.progress-seg.active, .progress-seg.done { background: var(--terracotta); }
.form-step { display: none; border: none; padding: 0; margin: 0; }
.form-step.active { display: block; }
.field { margin-bottom: 18px; }
.field label { font-size: 13px; font-weight: 600; color: var(--ink-soft); margin-bottom: 6px; display: block; }
.field input, .field select, .field textarea {
  width: 100%; padding: 14px 16px; border-radius: 12px; border: 1.5px solid var(--line);
  font-family: 'Manrope', sans-serif; font-size: 15px; background: var(--paper); color: var(--ink);
}
.checkbox-field { display: flex; gap: 8px; align-items: flex-start; margin-bottom: 12px; font-size: 13px; color: var(--ink-soft); }
.checkbox-field input { width: auto; margin-top: 3px; }
.step-actions { display: flex; gap: 12px; }
.step-actions .btn { flex: 1; }
.hidden-field { position: absolute; left: -9999px; }

/* Footer */
.site-footer { background: var(--ink); color: rgba(250,246,239,0.6); padding: 40px 0; font-size: 13px; }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; align-items: center; }
.footer-logo { font-family: 'Spectral', serif; color: var(--paper); font-size: 16px; }
.footer-links { display: flex; gap: 24px; }
.footer-links a { color: rgba(250,246,239,0.6); }

/* CTA mobile sticky */
.mobile-cta { display: none; position: fixed; bottom: 0; left: 0; right: 0; z-index: 50; background: var(--paper); border-top: 1px solid var(--line); padding: 12px 16px; box-shadow: 0 -8px 24px rgba(27,23,18,0.08); }

/* Responsive */
@media (max-width: 900px) {
  .section { padding: 64px 0; }
  .hero-grid, .two-col { grid-template-columns: 1fr; }
  .grid-3, .grid-4 { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .grid-2.comparison { grid-template-columns: 1fr; }
  .main-nav { display: none; }
  .header-inner .btn-small { display: none; }
  .mobile-cta { display: block; }
  body { padding-bottom: 76px; }
}
@media (max-width: 560px) {
  .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .hero h1 { font-size: 40px; }
}