/* ==========================================================================
   ALKILA SA — Design tokens & global styles
   Direction visuelle : DECISIONS.md / BENCHMARK.md
   Palette : blanc cassé / anthracite chaud / accent bronze (usage parcimonieux)
   Typo : Cormorant Garamond (titres) + Inter (corps)
   ========================================================================== */

:root {
  /* Couleurs */
  --color-bg:          #FAF8F5;
  --color-surface:     #FFFFFF;
  --color-ink:         #26241F;
  --color-ink-soft:    #5C574D;
  --color-accent:      #8C6A42; /* bronze — AA sur fond clair */
  --color-accent-soft: #C2A878;
  --color-line:        #E7E2D9;
  --color-dark:        #1E1C19; /* footer / hero overlay */
  --color-dark-soft:   #B5AFA3; /* texte secondaire sur fond sombre */
  --color-success:     #3E6B4F;
  --color-error:       #8C3B2E;

  /* Typographie */
  --font-display: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;

  /* Échelle */
  --text-xs: 0.78rem;
  --text-sm: 0.9rem;
  --text-base: 1rem;
  --text-lg: 1.2rem;
  --text-xl: 1.6rem;
  --text-2xl: clamp(1.9rem, 4vw, 2.6rem);
  --text-hero: clamp(2.6rem, 7vw, 4.6rem);

  /* Espacements */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6.5rem;

  /* Divers */
  --radius: 4px;
  --shadow-card: 0 2px 24px rgba(38, 36, 31, 0.07);
  --shadow-card-hover: 0 8px 36px rgba(38, 36, 31, 0.13);
  --header-h: 72px;
  --transition: 0.25s ease;
  --container: 1180px;
}

/* ---------- Reset minimal ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--color-ink);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--color-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 var(--space-2);
  letter-spacing: 0.01em;
}
h1 { font-size: var(--text-2xl); }
h2 { font-size: var(--text-xl); }
h3 { font-size: var(--text-lg); }

/* Accessibilité : focus visible + skip link */
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 3px; }
.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--color-ink); color: #fff;
  padding: var(--space-1) var(--space-2); z-index: 200;
}
.skip-link:focus { left: 0; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 var(--space-3); }

/* ---------- Header fixe ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; height: var(--header-h);
  display: flex; align-items: center;
  background: rgba(250, 248, 245, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-line);
  z-index: 100;
}
.site-header .container {
  display: flex; align-items: center; justify-content: space-between; width: 100%;
}
.brand {
  font-family: var(--font-display);
  font-size: 1.45rem; font-weight: 600;
  letter-spacing: 0.18em; color: var(--color-ink);
}
.brand:hover { text-decoration: none; }
.brand .brand-sa { color: var(--color-accent); }

.main-nav ul { display: flex; gap: var(--space-3); list-style: none; margin: 0; padding: 0; }
.main-nav a {
  color: var(--color-ink-soft); font-size: var(--text-sm);
  letter-spacing: 0.06em; text-transform: uppercase;
  padding: var(--space-1) 0; border-bottom: 1px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}
.main-nav a:hover { color: var(--color-ink); text-decoration: none; }
.main-nav a[aria-current="page"] { color: var(--color-accent); border-bottom-color: var(--color-accent); }

.nav-toggle {
  display: none; background: none; border: none; cursor: pointer;
  padding: var(--space-1); color: var(--color-ink);
}
.nav-toggle svg { width: 26px; height: 26px; }

/* ---------- Hero ---------- */
.hero {
  position: relative; min-height: 92vh;
  display: flex; align-items: center; justify-content: center;
  text-align: center; color: #fff;
  /* Dégradé architectural = placeholder permanent ; la photo réelle se superpose */
  background: linear-gradient(160deg, #2E2B26 0%, #4A443B 45%, #8C6A42 130%);
  overflow: hidden;
}
.hero-img {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; opacity: 0.55;
}
.hero::after { /* voile pour garantir le contraste du texte */
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(rgba(30, 28, 25, 0.35), rgba(30, 28, 25, 0.55));
}
.hero-content { position: relative; z-index: 2; padding: var(--space-4); max-width: 820px; }
.hero-kicker {
  font-size: var(--text-sm); letter-spacing: 0.35em; text-transform: uppercase;
  color: var(--color-accent-soft); margin-bottom: var(--space-2);
}
.hero h1 { font-size: var(--text-hero); font-weight: 500; color: #fff; }
.hero p { font-size: var(--text-lg); color: rgba(255,255,255,0.85); max-width: 560px; margin: var(--space-2) auto var(--space-4); }

/* ---------- Boutons ---------- */
.btn {
  display: inline-block; padding: 0.85rem 2.2rem;
  font-family: var(--font-body); font-size: var(--text-sm);
  letter-spacing: 0.12em; text-transform: uppercase;
  border: 1px solid var(--color-accent); border-radius: var(--radius);
  cursor: pointer; transition: background var(--transition), color var(--transition);
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--color-accent); color: #fff; }
.btn-primary:hover { background: #75562F; border-color: #75562F; }
.btn-ghost { background: transparent; color: var(--color-accent); }
.btn-ghost:hover { background: var(--color-accent); color: #fff; }
.hero .btn-ghost { color: #fff; border-color: rgba(255,255,255,0.7); }
.hero .btn-ghost:hover { background: #fff; color: var(--color-ink); border-color: #fff; }

/* ---------- Sections ---------- */
.section { padding: var(--space-6) 0; }
.section-alt { background: var(--color-surface); border-block: 1px solid var(--color-line); }
.section-head { max-width: 640px; margin-bottom: var(--space-4); }
.section-kicker {
  font-size: var(--text-xs); letter-spacing: 0.3em; text-transform: uppercase;
  color: var(--color-accent); margin-bottom: var(--space-1);
}
.section-head p { color: var(--color-ink-soft); }

/* ---------- Grille objets ---------- */
.property-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-3);
  list-style: none; margin: 0; padding: 0;
}
.property-card {
  background: var(--color-surface); border: 1px solid var(--color-line);
  border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition), transform var(--transition);
}
.property-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-3px); }
.property-card a { color: inherit; display: block; }
.property-card a:hover { text-decoration: none; }
.card-media { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: var(--color-line); }
.card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.property-card:hover .card-media img { transform: scale(1.04); }
.card-badge {
  position: absolute; top: var(--space-2); left: var(--space-2);
  padding: 0.25rem 0.7rem; border-radius: 2px;
  font-size: var(--text-xs); letter-spacing: 0.08em; text-transform: uppercase;
  background: rgba(30, 28, 25, 0.82); color: #fff;
}
.card-badge.is-available { background: var(--color-success); }
.card-body { padding: var(--space-3); }
.card-body h3 { margin-bottom: 0.35rem; }
.card-meta {
  display: flex; flex-wrap: wrap; gap: 0.4rem 1rem;
  color: var(--color-ink-soft); font-size: var(--text-sm);
  margin-bottom: var(--space-2);
}
.card-price { font-size: var(--text-lg); font-weight: 600; color: var(--color-ink); }
.card-price small { font-size: var(--text-xs); font-weight: 400; color: var(--color-ink-soft); }

/* ---------- Fiche objet ---------- */
.detail-layout { display: grid; grid-template-columns: 1.6fr 1fr; gap: var(--space-4); align-items: start; }
.gallery-main {
  aspect-ratio: 16 / 10; overflow: hidden; border-radius: var(--radius);
  background: var(--color-line);
}
.gallery-main img { width: 100%; height: 100%; object-fit: cover; }
.gallery-thumbs { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-1); margin-top: var(--space-1); }
.gallery-thumbs button {
  padding: 0; border: 2px solid transparent; border-radius: var(--radius);
  overflow: hidden; cursor: pointer; background: var(--color-line);
  aspect-ratio: 4 / 3;
}
.gallery-thumbs button.is-active { border-color: var(--color-accent); }
.gallery-thumbs img { width: 100%; height: 100%; object-fit: cover; }

.detail-side {
  position: sticky; top: calc(var(--header-h) + var(--space-2));
  background: var(--color-surface); border: 1px solid var(--color-line);
  border-radius: var(--radius); padding: var(--space-3);
}
.detail-price { font-size: var(--text-xl); font-weight: 600; margin: var(--space-1) 0; }
.detail-price small { font-size: var(--text-sm); font-weight: 400; color: var(--color-ink-soft); }
.feature-list { list-style: none; margin: var(--space-2) 0; padding: 0; }
.feature-list li {
  display: flex; justify-content: space-between; gap: var(--space-2);
  padding: 0.55rem 0; border-bottom: 1px solid var(--color-line);
  font-size: var(--text-sm);
}
.feature-list li span:first-child { color: var(--color-ink-soft); }
.detail-side .btn { width: 100%; text-align: center; margin-top: var(--space-2); }
.detail-desc { white-space: pre-line; color: var(--color-ink-soft); }
.equip-tags { display: flex; flex-wrap: wrap; gap: var(--space-1); list-style: none; padding: 0; }
.equip-tags li {
  padding: 0.3rem 0.8rem; border: 1px solid var(--color-line); border-radius: 999px;
  font-size: var(--text-xs); color: var(--color-ink-soft); background: var(--color-surface);
}

/* ---------- À propos ---------- */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); align-items: center; }
.about-figure { aspect-ratio: 4 / 5; border-radius: var(--radius); overflow: hidden; background: var(--color-line); }
.about-figure img { width: 100%; height: 100%; object-fit: cover; }
.stat-row { display: flex; gap: var(--space-4); margin-top: var(--space-3); }
.stat-row div strong { display: block; font-family: var(--font-display); font-size: var(--text-2xl); color: var(--color-accent); }
.stat-row div span { font-size: var(--text-sm); color: var(--color-ink-soft); }

/* ---------- Section immeuble (À propos) ---------- */
.building-layout { display: grid; grid-template-columns: 1.25fr 1fr; gap: var(--space-3); align-items: stretch; margin-top: var(--space-4); }
.building-gallery { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-2); }
.building-gallery figure { margin: 0; border-radius: var(--radius); overflow: hidden; background: var(--color-line); }
.building-gallery img { width: 100%; height: 100%; aspect-ratio: 4 / 3; object-fit: cover; transition: transform 0.5s ease; }
.building-gallery figure:hover img { transform: scale(1.04); }
.map-card { display: flex; flex-direction: column; border: 1px solid var(--color-line); border-radius: var(--radius); overflow: hidden; background: var(--color-surface); }
.map-card iframe { width: 100%; flex: 1; min-height: 320px; border: 0; }
.map-card-footer { padding: var(--space-2) var(--space-3); font-size: var(--text-sm); display: flex; justify-content: space-between; gap: var(--space-2); flex-wrap: wrap; }

/* ---------- Formulaire contact ---------- */
.contact-layout { display: grid; grid-template-columns: 1fr 1.4fr; gap: var(--space-5); align-items: start; }
.contact-info p { color: var(--color-ink-soft); }
.contact-direct { list-style: none; padding: 0; margin: var(--space-3) 0; }
.contact-direct li { padding: 0.4rem 0; }
.contact-direct strong { display: block; font-size: var(--text-xs); letter-spacing: 0.15em; text-transform: uppercase; color: var(--color-ink-soft); }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-2); }
.form-field { display: flex; flex-direction: column; gap: 0.35rem; }
.form-field.full { grid-column: 1 / -1; }
.form-field label { font-size: var(--text-sm); font-weight: 500; }
.form-field label .req { color: var(--color-error); }
.form-field input, .form-field select, .form-field textarea {
  font: inherit; padding: 0.7rem 0.9rem;
  border: 1px solid var(--color-line); border-radius: var(--radius);
  background: var(--color-surface); color: var(--color-ink);
}
.form-field input:focus, .form-field select:focus, .form-field textarea:focus {
  border-color: var(--color-accent); outline: none;
}
.form-field .field-error { font-size: var(--text-xs); color: var(--color-error); min-height: 1em; }
.form-note { font-size: var(--text-xs); color: var(--color-ink-soft); grid-column: 1 / -1; }
/* Honeypot anti-spam : caché aux humains, rempli par les bots */
.hp-field { position: absolute; left: -9999px; opacity: 0; height: 0; overflow: hidden; }

.form-status { grid-column: 1 / -1; padding: var(--space-2); border-radius: var(--radius); font-size: var(--text-sm); }
.form-status.success { background: #EAF2EC; color: var(--color-success); border: 1px solid #C5DACB; }
.form-status.error { background: #F7ECEA; color: var(--color-error); border: 1px solid #E3C4BD; }
.form-status[hidden] { display: none; }

/* ---------- Bandeau CTA ---------- */
.cta-band { background: var(--color-dark); color: #fff; text-align: center; }
.cta-band h2 { color: #fff; font-size: var(--text-2xl); }
.cta-band p { color: var(--color-dark-soft); max-width: 520px; margin: 0 auto var(--space-3); }

/* ---------- Footer ---------- */
.site-footer { background: var(--color-dark); color: var(--color-dark-soft); padding: var(--space-5) 0 var(--space-3); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: var(--space-4); }
.site-footer .brand { color: #fff; }
.site-footer h3 { color: #fff; font-family: var(--font-body); font-size: var(--text-xs); letter-spacing: 0.2em; text-transform: uppercase; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { padding: 0.25rem 0; }
.site-footer a { color: var(--color-dark-soft); }
.site-footer a:hover { color: #fff; }
.footer-bottom {
  margin-top: var(--space-4); padding-top: var(--space-2);
  border-top: 1px solid rgba(255,255,255,0.12);
  font-size: var(--text-xs); display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--space-1);
}

/* ---------- Message d'erreur de rendu (garde-fou council) ---------- */
.render-error {
  padding: var(--space-3); border: 1px solid var(--color-error);
  border-radius: var(--radius); background: #F7ECEA; color: var(--color-error);
}

/* ---------- Responsive ---------- */
@media (max-width: 920px) {
  .property-grid { grid-template-columns: repeat(2, 1fr); }
  .detail-layout, .contact-layout, .about-grid, .building-layout { grid-template-columns: 1fr; }
  .detail-side { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .property-grid { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .section { padding: var(--space-5) 0; }
  .stat-row { flex-wrap: wrap; gap: var(--space-3); }

  /* Navigation mobile */
  .nav-toggle { display: block; }
  .main-nav {
    position: fixed; top: var(--header-h); left: 0; right: 0;
    background: var(--color-bg); border-bottom: 1px solid var(--color-line);
    transform: translateY(-130%); transition: transform var(--transition);
    visibility: hidden;
  }
  .main-nav.is-open { transform: translateY(0); visibility: visible; }
  .main-nav ul { flex-direction: column; gap: 0; padding: var(--space-2) var(--space-3); }
  .main-nav li { border-bottom: 1px solid var(--color-line); }
  .main-nav li:last-child { border-bottom: none; }
  .main-nav a { display: block; padding: var(--space-2) 0; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
  html { scroll-behavior: auto; }
}