/* ============================================================
   Atlas & Co — Immobilier V2 — Bold & Blanc
   Palette : blanc #FFFFFF · noir #0A0A0A · accent #1A1A1A · gris #6B6B6B
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --blanc:  #FFFFFF;
  --noir:   #0A0A0A;
  --gris:   #6B6B6B;
  --border: #E8E8E8;
  --fond:   #F5F5F3;
  --font-display: 'Fraunces', Georgia, serif;
  --font-body:    'Inter', system-ui, sans-serif;
}

html { scroll-behavior: smooth; }
body.at-page { background: var(--blanc); color: var(--noir); font-family: var(--font-body); font-weight: 300; }

/* CONTAINER */
.at-container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; }

/* BACK */
.at-back {
  position: fixed; top: 1.25rem; left: 1.25rem; z-index: 200;
  display: flex; align-items: center; gap: 0.4rem;
  font-size: 0.8rem; color: var(--gris); text-decoration: none;
  background: rgba(255,255,255,.9); backdrop-filter: blur(8px);
  padding: 0.4rem 0.9rem; border-radius: 50px; border: 1px solid var(--border);
  transition: color .2s;
}
.at-back svg { width: 14px; height: 14px; }
.at-back:hover { color: var(--noir); }

/* HEADER */
.at-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255,255,255,.95); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.at-header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.at-logo {
  font-family: var(--font-display); font-size: 1.1rem; font-weight: 800;
  letter-spacing: .05em; text-decoration: none; color: var(--noir);
}
.at-logo span { color: var(--gris); font-weight: 400; }
.at-nav { display: flex; gap: 2rem; }
.at-nav a { text-decoration: none; color: var(--gris); font-size: 0.875rem; transition: color .2s; }
.at-nav a:hover { color: var(--noir); }

/* BOUTONS */
.at-btn-primary {
  display: inline-block; padding: 0.7rem 1.6rem;
  background: var(--noir); color: var(--blanc);
  border-radius: 4px; text-decoration: none; font-size: 0.875rem;
  font-weight: 500; border: none; cursor: pointer;
  transition: background .2s, transform .15s; font-family: var(--font-body);
}
.at-btn-primary:hover { background: #333; transform: translateY(-1px); }
.at-btn-white {
  display: inline-block; padding: 0.7rem 1.6rem;
  background: var(--blanc); color: var(--noir);
  border-radius: 4px; text-decoration: none; font-size: 0.875rem; font-weight: 500;
  transition: all .2s;
}
.at-btn-white:hover { background: #eee; }
.at-btn-ghost-white {
  display: inline-block; padding: 0.7rem 1.6rem;
  background: transparent; color: var(--blanc);
  border-radius: 4px; text-decoration: none; font-size: 0.875rem; font-weight: 400;
  border: 1px solid rgba(255,255,255,.5); transition: all .2s;
}
.at-btn-ghost-white:hover { border-color: #fff; background: rgba(255,255,255,.1); }
.at-btn-full { width: 100%; text-align: center; }

/* EYEBROW */
.at-eyebrow {
  font-size: 0.72rem; font-weight: 500; letter-spacing: .14em;
  text-transform: uppercase; color: var(--gris); margin-bottom: 1rem;
}

/* HERO */
.at-hero { position: relative; height: 100vh; min-height: 600px; display: flex; flex-direction: column; justify-content: flex-end; }
.at-hero-img-wrap { position: absolute; inset: 0; }
.at-hero-img-wrap img { width: 100%; height: 100%; object-fit: cover; display: block; }
.at-hero-overlay { position: absolute; inset: 0; background: linear-gradient(to top, rgba(0,0,0,.75) 0%, rgba(0,0,0,.2) 60%, transparent 100%); }
.at-hero-content {
  position: relative; z-index: 2;
  padding: 0 2rem; max-width: 1200px; margin: 0 auto; width: 100%;
  padding-bottom: 5rem;
}
.at-hero-content .at-eyebrow { color: rgba(255,255,255,.7); }
.at-hero-title {
  font-family: var(--font-display); font-size: clamp(3rem, 7vw, 6rem);
  font-weight: 800; color: var(--blanc); line-height: 1.0; margin-bottom: 2rem;
}
.at-hero-ctas { display: flex; gap: 1rem; }
.at-hero-stats {
  position: relative; z-index: 2;
  background: var(--blanc); display: flex; align-items: center;
  padding: 1.5rem 3rem; gap: 3rem;
}
.at-hstat { display: flex; flex-direction: column; }
.at-hstat-num { font-family: var(--font-display); font-size: 1.6rem; font-weight: 700; }
.at-hstat-label { font-size: 0.75rem; color: var(--gris); }
.at-hstat-sep { width: 1px; height: 40px; background: var(--border); }

/* INTRO */
.at-intro { padding: 6rem 0; }
.at-intro-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }
.at-display-title {
  font-family: var(--font-display); font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800; line-height: 1.05;
}
.at-display-title em { font-style: italic; font-weight: 400; color: var(--gris); }
.at-display-title-sm {
  font-family: var(--font-display); font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 800; line-height: 1.1; margin-bottom: 1.25rem;
}
.at-display-title-sm em { font-style: italic; font-weight: 400; color: var(--gris); }
.at-intro-text { color: var(--gris); line-height: 1.75; font-size: 1.05rem; }

/* BIENS — BENTO */
.at-biens { padding: 0 0 6rem; }
.at-section-label {
  display: flex; justify-content: space-between; align-items: center;
  padding-bottom: 1.5rem; border-bottom: 1px solid var(--border); margin-bottom: 1.5rem;
  font-size: 0.8rem;
}
.at-link-arrow { color: var(--noir); text-decoration: none; font-weight: 500; transition: gap .2s; }
.at-link-arrow:hover { text-decoration: underline; }

.at-bento {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  grid-template-rows: auto auto;
  gap: 1rem;
}
.at-bento-card {
  border-radius: 8px; overflow: hidden;
  border: 1px solid var(--border); background: var(--blanc);
  display: flex; flex-direction: column;
  transition: transform .2s, box-shadow .2s;
}
.at-bento-card:hover { transform: translateY(-3px); box-shadow: 0 16px 40px rgba(0,0,0,.08); }
.at-bento-large { grid-column: 1; grid-row: 1 / 3; }
.at-bento-sm { grid-column: span 1; }
.at-bento-wide { grid-column: 2 / 4; }
.at-bento-dark { background: var(--noir); border-color: var(--noir); justify-content: flex-end; min-height: 220px; }

.at-bento-img { flex: 1; overflow: hidden; min-height: 200px; position: relative; }
.at-bento-img img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .4s; }
.at-bento-card:hover .at-bento-img img { transform: scale(1.03); }
.at-bento-badge {
  position: absolute; top: 1rem; left: 1rem;
  background: var(--noir); color: var(--blanc);
  font-size: 0.7rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase;
  padding: 0.3rem 0.75rem; border-radius: 2px;
}
.at-bento-info { padding: 1.25rem 1.5rem; }
.at-bento-loc { font-size: 0.72rem; color: var(--gris); letter-spacing: .06em; text-transform: uppercase; margin-bottom: 0.35rem; }
.at-bento-title { font-family: var(--font-display); font-size: 1.1rem; font-weight: 700; margin-bottom: 0.35rem; }
.at-bento-meta { font-size: 0.8rem; color: var(--gris); margin-bottom: 0.75rem; }
.at-bento-price { font-family: var(--font-display); font-size: 1.2rem; font-weight: 700; }
.at-bento-cta { margin-top: 1.25rem; display: inline-block; }

/* SERVICES */
.at-services { padding: 6rem 0; background: linear-gradient(135deg, #f5f5f3 0%, #eae8e3 50%, #f0ede8 100%); }
.at-services-header { margin-bottom: 3rem; }
.at-services-list { display: flex; flex-direction: column; gap: 0; }
.at-service-item {
  display: grid; grid-template-columns: 80px 1fr;
  padding: 2rem 0; border-bottom: 1px solid var(--border);
  gap: 2rem; align-items: start;
}
.at-service-item:first-child { border-top: 1px solid var(--border); }
.at-service-num { font-family: var(--font-display); font-size: 0.75rem; font-weight: 700; color: var(--gris); padding-top: 0.25rem; }
.at-service-item h3 { font-family: var(--font-display); font-size: 1.35rem; font-weight: 700; margin-bottom: 0.5rem; }
.at-service-item p { color: var(--gris); line-height: 1.65; font-size: 0.9rem; }

/* AGENCE */
.at-agence { padding: 6rem 0; }
.at-agence-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 5rem; align-items: center; }
.at-agence-visual img { width: 100%; border-radius: 8px; display: block; aspect-ratio: 4/3; object-fit: cover; }
.at-agence-content p { color: var(--gris); line-height: 1.7; margin-bottom: 1.25rem; }
.at-agence-content .at-btn-primary { margin-top: 0.5rem; }

/* CONTACT */
.at-contact { padding: 6rem 0; background: var(--fond); }
.at-contact-inner { display: grid; grid-template-columns: 1fr 1.4fr; gap: 5rem; align-items: start; }
.at-contact-left p { color: var(--gris); line-height: 1.7; margin-bottom: 2rem; }
.at-contact-details { display: flex; flex-direction: column; gap: 0.6rem; font-size: 0.875rem; color: var(--gris); }

/* FORM */
.at-form { display: flex; flex-direction: column; gap: 1.25rem; }
.at-form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.at-form label { display: block; font-size: 0.75rem; font-weight: 500; letter-spacing: .04em; text-transform: uppercase; margin-bottom: 0.4rem; color: var(--noir); }
.at-form input, .at-form select, .at-form textarea {
  width: 100%; padding: 0.8rem 1rem;
  border: 1.5px solid var(--border); border-radius: 4px;
  background: var(--blanc); font-family: var(--font-body); font-size: 0.875rem;
  color: var(--noir); outline: none; transition: border-color .2s;
}
.at-form input:focus, .at-form select:focus, .at-form textarea:focus { border-color: var(--noir); }

/* FOOTER */
.at-footer { padding: 2rem 0; background: var(--noir); }
.at-footer-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem; }
.at-footer-logo { font-family: var(--font-display); font-size: 1rem; font-weight: 800; color: var(--blanc); letter-spacing: .05em; }
.at-footer-logo em { font-style: normal; color: var(--gris); font-weight: 400; }
.at-footer p { font-size: 0.75rem; color: rgba(255,255,255,.4); }
.at-footer-links { display: flex; gap: 1.5rem; }
.at-footer-links a { color: rgba(255,255,255,.4); text-decoration: none; font-size: 0.75rem; transition: color .2s; }
.at-footer-links a:hover { color: #fff; }

/* ANIMATIONS */
.at-reveal { opacity: 0; transform: translateY(20px); transition: opacity .6s ease, transform .6s ease; }
.at-reveal.at-visible { opacity: 1; transform: translateY(0); }
.at-reveal-stagger > * { transform: translateY(16px); transition: transform .5s ease; }
.at-reveal-stagger.at-visible > * { transform: translateY(0); }
.at-reveal-stagger.at-visible > *:nth-child(1) { transition-delay: .0s; }
.at-reveal-stagger.at-visible > *:nth-child(2) { transition-delay: .1s; }
.at-reveal-stagger.at-visible > *:nth-child(3) { transition-delay: .2s; }
.at-reveal-stagger.at-visible > *:nth-child(4) { transition-delay: .3s; }

/* RESPONSIVE */
@media (max-width: 1024px) {
  .at-bento { grid-template-columns: 1fr 1fr; }
  .at-bento-large { grid-column: 1 / 3; grid-row: auto; }
  .at-bento-wide { grid-column: 1 / 3; }
}
@media (max-width: 768px) {
  .at-nav { display: none; }
  .at-hero-title { font-size: 2.5rem; }
  .at-hero-stats { flex-wrap: wrap; gap: 1.5rem; padding: 1.25rem 2rem; }
  .at-intro-inner { grid-template-columns: 1fr; }
  .at-bento { grid-template-columns: 1fr; }
  .at-bento-large, .at-bento-wide { grid-column: 1; }
  .at-agence-inner { grid-template-columns: 1fr; }
  .at-contact-inner { grid-template-columns: 1fr; gap: 2.5rem; }
  .at-form-row { grid-template-columns: 1fr; }
}

/* VERSION SWITCH */
.at-version-switch {
  position: fixed; bottom: 1.5rem; right: 1.5rem; z-index: 200;
  display: flex; align-items: center;
  font-size: 0.8rem; color: var(--gris); text-decoration: none;
  background: rgba(255,255,255,.92); backdrop-filter: blur(8px);
  padding: 0.45rem 1rem; border-radius: 50px; border: 1px solid var(--border);
  transition: color .2s;
}
.at-version-switch:hover { color: var(--noir); }