/* roulang page: index */
:root {
      --primary: #2563EB;
      --primary-dark: #0F172A;
      --accent: #10B981;
      --text-main: #0F172A;
      --text-muted: #475569;
      --bg-light: #F8FAFC;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      color: #0F172A;
      background-color: #FFFFFF;
    }
    .video-hero-overlay {
      background: radial-gradient(circle at center, rgba(15, 23, 42, 0.72) 0%, rgba(11, 15, 25, 0.94) 100%);
    }
    .glass-nav {
      backdrop-filter: blur(12px);
      background-color: rgba(255, 255, 255, 0.92);
    }
    .card-hover {
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }
    .card-hover:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 25px -5px rgba(15, 23, 42, 0.08), 0 10px 10px -5px rgba(15, 23, 42, 0.04);
    }
    details > summary::-webkit-details-marker {
      display: none;
    }