/* roulang page: index */
:root {
      --bg-surface: #F8F9FA;
      --bg-dark: #0A0D12;
      --primary-color: #111827;
      --accent-color: #0D9488;
      --alert-color: #E11D48;
      --border-color: #E2E8F0;
    }
    body {
      background-color: var(--bg-surface);
      color: #334155;
      font-feature-settings: "cv02", "cv03", "cv04", "cv11";
      -webkit-font-smoothing: antialiased;
    }
    .video-hero-overlay {
      background: linear-gradient(180deg, rgba(10, 13, 18, 0.78) 0%, rgba(10, 13, 18, 0.92) 100%);
    }
    .glass-card {
      background: rgba(255, 255, 255, 0.95);
      border: 1px solid var(--border-color);
      box-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 10px 15px -5px rgba(0,0,0,0.02);
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .glass-card:hover {
      transform: translateY(-2px);
      border-color: var(--accent-color);
      box-shadow: 0 12px 24px -8px rgba(13, 148, 136, 0.12);
    }
    .code-grid-bg {
      background-image: radial-gradient(rgba(13, 148, 136, 0.15) 1px, transparent 1px);
      background-size: 24px 24px;
    }