/* roulang page: index */
:root {
      --primary: #1E40AF;
      --primary-hover: #1D4ED8;
      --secondary: #3B82F6;
      --accent-teal: #0D9488;
      --accent-amber: #F59E0B;
      --bg-base: #F8FAFC;
      --bg-card: #FFFFFF;
      --bg-dark: #0F172A;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border: #E2E8F0;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    }
    body {
      background-color: var(--bg-base);
      color: var(--text-body);
      margin: 0;
      padding: 0;
    }
    .custom-shadow {
      box-shadow: 0 4px 20px -4px rgba(30, 58, 138, 0.06);
    }
    .hover-lift {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .hover-lift:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 24px -6px rgba(30, 58, 138, 0.12);
    }
    details summary::-webkit-details-marker {
      display: none;
    }