/* roulang page: index */
:root {
      --bg-dark: #060B19;
      --brand-cyan: #00E5FF;
      --brand-mint: #00FFA3;
      --card-bg: rgba(15, 28, 63, 0.65);
      --border-cyan: rgba(0, 229, 255, 0.2);
    }
    body {
      background-color: #060B19;
      color: #E2E8F0;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      overflow-x: hidden;
    }
    .glass-card {
      background: rgba(15, 28, 63, 0.65);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid rgba(0, 229, 255, 0.18);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .glass-card:hover {
      border-color: rgba(0, 229, 255, 0.6);
      transform: translateY(-4px);
      box-shadow: 0 12px 30px -10px rgba(0, 229, 255, 0.25);
    }
    .glow-btn {
      background: linear-gradient(135deg, #00E5FF, #00B4D8);
      color: #040711;
      font-weight: 700;
      box-shadow: 0 0 20px rgba(0, 229, 255, 0.45);
      transition: all 0.25s ease-in-out;
    }
    .glow-btn:hover {
      box-shadow: 0 0 32px rgba(0, 229, 255, 0.75);
      transform: translateY(-2px);
    }
    .outline-btn {
      border: 1px solid #00E5FF;
      color: #00E5FF;
      transition: all 0.25s ease-in-out;
    }
    .outline-btn:hover {
      background: rgba(0, 229, 255, 0.12);
      box-shadow: 0 0 16px rgba(0, 229, 255, 0.3);
      color: #FFFFFF;
    }
    .text-glow {
      text-shadow: 0 0 16px rgba(0, 229, 255, 0.4);
    }
    details summary::-webkit-details-marker {
      display:none;
    }