/* Thème automatique — suit les préférences système (clair / sombre) */

html {
  color-scheme: dark light;
}

@media (prefers-color-scheme: light) {
  :root[data-theme="auto"] {
    --bg: #f8fafc;
    --bg-elevated: #f1f5f9;
    --bg-card: #ffffff;
    --border: rgba(15, 23, 42, 0.1);
    --border-hover: rgba(8, 145, 178, 0.45);
    --accent: #0891b2;
    --accent-dim: rgba(8, 145, 178, 0.12);
    --accent-glow: rgba(8, 145, 178, 0.22);
    --text: #0f172a;
    --text-muted: #475569;
    --text-soft: #64748b;
    color-scheme: light;
  }

  :root[data-theme="auto"] .site-header.is-scrolled .site-header__bar {
    background: rgba(248, 250, 252, 0.92);
    border-color: var(--border);
  }

  :root[data-theme="auto"] .hero-grid {
    background-image:
      linear-gradient(rgba(15, 23, 42, 0.06) 1px, transparent 1px),
      linear-gradient(90deg, rgba(15, 23, 42, 0.06) 1px, transparent 1px);
  }

  :root[data-theme="auto"] .hero-metric div,
  :root[data-theme="auto"] .sector-pill {
    background: rgba(255, 255, 255, 0.92);
  }

  :root[data-theme="auto"] .btn-primary {
    color: #ffffff;
  }

  :root[data-theme="auto"] .project-card:hover,
  :root[data-theme="auto"] .featured-project:hover {
    box-shadow: 0 16px 40px rgba(15, 23, 42, 0.12);
  }

  :root[data-theme="auto"] .social-links img {
    filter: brightness(0.2);
  }

  :root[data-theme="auto"] .site-loader {
    background: #eef2f7;
  }

  :root[data-theme="auto"] .site-loader__message {
    color: #1e293b;
  }

  /* Wordmark blanc : pastille sombre en mode clair */
  :root[data-theme="auto"] .logo {
    background: #0a0a12;
    padding: 0.35rem 0.55rem;
    border-radius: 10px;
  }
}

@media (prefers-color-scheme: dark) {
  :root[data-theme="auto"] {
    color-scheme: dark;
  }

  /* Loader reste clair : logo-dark (WE navy) */
  :root[data-theme="auto"] .site-loader {
    background: #eef2f7;
  }

  :root[data-theme="auto"] .site-loader__message {
    color: #1e293b;
  }
}