/* THEME BTP CHANTIER — Dark + jaune ruban warning (style gros-oeuvres) */
:root {
  --primary: #fbc02d;
  --primary-dark: #f9a825;
  --bg: #1a1a1a;
  --bg-alt: #232323;
  --bg-card: #2a2a2a;
  --text: #f5f5f5;
  --text-mute: #aaa;
  --border: #3a3a3a;
  --warning: #ffeb3b;
}
* { box-sizing: border-box; }
body { font-family: 'Roboto Condensed', 'Inter', system-ui, sans-serif; margin: 0; color: var(--text); background: var(--bg); line-height: 1.6; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
header { background: #000; padding: 18px 0; border-bottom: 6px solid var(--primary); position: relative; }
header::after { content: ''; position: absolute; bottom: -12px; left: 0; right: 0; height: 8px; background-image: repeating-linear-gradient(45deg, var(--primary) 0, var(--primary) 12px, #000 12px, #000 24px); }
header nav { display: flex; justify-content: space-between; align-items: center; }
header .logo { font-size: 1.4rem; font-weight: 900; color: #fff; text-decoration: none; letter-spacing: .02em; }
header .logo span { color: var(--primary); }
.btn-cta { display: inline-block; background: var(--primary); color: #000; padding: 14px 32px; border-radius: 0; text-decoration: none; font-weight: 800; font-size: .95rem; letter-spacing: .05em; text-transform: uppercase; transition: all .2s; border: 3px solid var(--primary); }
.btn-cta:hover { background: transparent; color: var(--primary); }
.hero { padding: 80px 0; }
.hero .badge-zone { display: inline-block; background: var(--warning); color: #000; padding: 8px 20px; font-weight: 800; font-size: .85rem; letter-spacing: .05em; text-transform: uppercase; margin-bottom: 30px; }
.hero h1 { font-size: 4.5rem; margin: 0 0 24px 0; line-height: 1; font-weight: 900; text-transform: uppercase; letter-spacing: -.02em; }
.hero h1 mark { background: var(--primary); color: #000; padding: 0 16px; }
.hero p.lead { font-size: 1.1rem; color: var(--text-mute); max-width: 600px; margin: 0 0 40px 0; }
section { padding: 80px 0; }
section.alt { background: var(--bg-alt); }
section h2 { font-size: 2.4rem; margin: 0 0 32px 0; font-weight: 900; text-transform: uppercase; letter-spacing: -.01em; }
.cards-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; }
.card { background: var(--bg-card); padding: 28px; border-radius: 0; border-left: 4px solid var(--primary); }
.card h3 { color: var(--primary); font-size: 1.2rem; margin: 0 0 12px 0; text-transform: uppercase; letter-spacing: .02em; }
.card p { color: var(--text-mute); }
footer { background: #000; padding: 60px 0 20px; margin-top: 60px; border-top: 6px solid var(--primary); color: var(--text-mute); }
footer a { color: var(--primary); text-decoration: none; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 30px; margin-bottom: 30px; }
@media (max-width: 700px) { .hero h1 { font-size: 2.5rem; } }