/* roulang page: index */
:root {
      --primary: #0066FF;
      --secondary: #00B4D8;
      --accent: #FF5A36;
      --bg-dark: #0B132B;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --border-color: rgba(148, 163, 184, 0.2);
    }
    body {
      color: #334155;
      background-color: #FFFFFF;
      overflow-x: hidden;
    }
    .custom-scroll::-webkit-scrollbar {
      height: 6px;
    }
    .custom-scroll::-webkit-scrollbar-track {
      background: #f1f5f9;
    }
    .custom-scroll::-webkit-scrollbar-thumb {
      background: #cbd5e1;
      border-radius: 9999px;
    }
    .glass-nav {
      background: rgba(255, 255, 255, 0.88);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
    }
    .tech-border {
      border: 1px solid rgba(148, 163, 184, 0.2);
      transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .tech-border:hover {
      border-color: rgba(0, 102, 255, 0.4);
      transform: translateY(-4px);
      box-shadow: 0 12px 28px -8px rgba(0, 102, 255, 0.08);
    }
    .glow-cyan {
      box-shadow: 0 0 35px -5px rgba(0, 180, 216, 0.25);
    }
    details summary::-webkit-details-marker {
      display: none;
    }
    details[open] summary svg {
      transform: rotate(180deg);
    }