/* roulang page: index */
:root {
            --primary: #38bdf8;
            --primary-glow: rgba(56, 189, 248, 0.35);
            --bg-base: #070c18;
            --card-glass: rgba(15, 23, 42, 0.75);
            --border-glass: rgba(56, 189, 248, 0.15);
        }
        body {
            background-color: var(--bg-base);
            color: #cbd5e1;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            overflow-x: hidden;
        }
        .glass-panel {
            background: var(--card-glass);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
        }
        .glass-panel:hover {
            border-color: rgba(56, 189, 248, 0.35);
        }
        .btn-glow {
            position: relative;
            background: linear-gradient(135deg, #0284c7, #2563eb);
            box-shadow: 0 0 20px rgba(14, 165, 233, 0.4);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .btn-glow:hover {
            box-shadow: 0 0 30px rgba(14, 165, 233, 0.7);
            transform: translateY(-2px);
        }
        .btn-glow-amber {
            position: relative;
            background: linear-gradient(135deg, #d97706, #b45309);
            box-shadow: 0 0 20px rgba(245, 158, 11, 0.35);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .btn-glow-amber:hover {
            box-shadow: 0 0 30px rgba(245, 158, 11, 0.6);
            transform: translateY(-2px);
        }
        .grid-bg {
            background-image: radial-gradient(rgba(56, 189, 248, 0.12) 1px, transparent 1px);
            background-size: 32px 32px;
        }

/* roulang page: category1 */
:root {
      --primary: #38bdf8;
      --primary-glow: rgba(56, 189, 248, 0.35);
      --bg-base: #070c18;
      --card-glass: rgba(15, 23, 42, 0.75);
      --border-glass: rgba(56, 189, 248, 0.15);
    }
    body {
      background-color: var(--bg-base);
      color: #cbd5e1;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      overflow-x: hidden;
    }
    .glass-panel {
      background: rgba(15, 23, 42, 0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
    }
    .card-glass {
      background: var(--card-glass);
      border: 1px solid var(--border-glass);
      backdrop-filter: blur(12px);
    }
    .card-glass:hover {
      border-color: rgba(56, 189, 248, 0.4);
    }
    .btn-glow {
      position: relative;
      background: linear-gradient(135deg, #0284c7, #2563eb);
      box-shadow: 0 0 20px rgba(14, 165, 233, 0.4);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .btn-glow:hover {
      box-shadow: 0 0 30px rgba(14, 165, 233, 0.7);
      transform: translateY(-2px);
    }
    .btn-glow-amber {
      position: relative;
      background: linear-gradient(135deg, #d97706, #b45309);
      box-shadow: 0 0 20px rgba(245, 158, 11, 0.35);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .btn-glow-amber:hover {
      box-shadow: 0 0 30px rgba(245, 158, 11, 0.6);
      transform: translateY(-2px);
    }
    .shadow-glow-amber {
      box-shadow: 0 0 15px rgba(245, 158, 11, 0.5);
    }
    .grid-bg {
      background-image: radial-gradient(rgba(56, 189, 248, 0.12) 1px, transparent 1px);
      background-size: 32px 32px;
    }