/* roulang page: index */
:root {
      --bg-dark: #0A0D14;
      --accent: #00D2A0;
      --accent-hover: #00B88C;
      --surface: #121824;
      --card-bg: #1B2230;
      --text-main: #F8FAFC;
      --text-muted: #94A3B8;
      --border-subtle: #242E42;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    body {
      background-color: var(--bg-dark);
      color: var(--text-main);
      overflow-x: hidden;
      line-height: 1.7;
    }
    .custom-scroll::-webkit-scrollbar {
      width: 6px;
      height: 6px;
    }
    .custom-scroll::-webkit-scrollbar-thumb {
      background: #242E42;
      border-radius: 3px;
    }
    .hero-mask {
      background: linear-gradient(135deg, rgba(10, 13, 20, 0.96) 20%, rgba(10, 13, 20, 0.75) 60%, rgba(0, 210, 160, 0.12) 100%);
    }
    .tech-grid-pattern {
      background-image: radial-gradient(rgba(0, 210, 160, 0.15) 1px, transparent 1px);
      background-size: 24px 24px;
    }