/* roulang page: index */
:root {
      --primary: #1e40af;
      --accent: #0284c7;
      --bg-light: #f8fafc;
      --text-main: #0f172a;
      --text-muted: #64748b;
      --border-color: #e2e8f0;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      color: var(--text-main);
      background-color: #ffffff;
      -webkit-font-smoothing: antialiased;
    }
    .custom-shadow {
      box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05), 0 2px 6px -2px rgba(15, 23, 42, 0.03);
    }
    .hover-lift {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .hover-lift:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 25px -5px rgba(15, 23, 42, 0.08), 0 10px 10px -5px rgba(15, 23, 42, 0.04);
    }
    .tech-gradient-text {
      background: linear-gradient(135deg, #1e40af 0%, #0284c7 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .tech-card-border {
      border: 1px solid #e2e8f0;
      transition: border-color 0.3s ease;
    }
    .tech-card-border:hover {
      border-color: #93c5fd;
    }
    .glass-nav {
      backdrop-filter: blur(12px);
      background-color: rgba(255, 255, 255, 0.92);
    }