/* roulang page: index */
:root {
      --bg-dark: #0a0f1d;
      --bg-card: rgba(15, 23, 42, 0.72);
      --border-glow: rgba(56, 189, 248, 0.18);
      --glow-blue: rgba(2, 132, 199, 0.45);
    }
    body {
      background-color: var(--bg-dark);
      color: #f8fafc;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      overflow-x: hidden;
    }
    .glass-card {
      background: var(--bg-card);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border: 1px solid var(--border-glow);
      box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.05);
    }
    .glow-btn {
      background: linear-gradient(135deg, #0284c7 0%, #2563eb 100%);
      box-shadow: 0 0 22px var(--glow-blue);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .glow-btn:hover {
      box-shadow: 0 0 32px rgba(56, 189, 248, 0.65);
      filter: brightness(1.1);
      transform: translateY(-1px);
    }
    .tag-badge {
      border: 1px solid rgba(56, 189, 248, 0.25);
      background: rgba(2, 132, 199, 0.1);
    }
    details summary::-webkit-details-marker {
      display: none;
    }