/* roulang page: index */
:root {
      --primary-teal: #0D9488;
      --primary-blue: #0284C7;
      --accent-orange: #F97316;
      --bg-light: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --card-border: rgba(226, 232, 240, 0.8);
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      color: var(--text-main);
      background-color: var(--bg-light);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      overflow-x: hidden;
    }
    .custom-shadow {
      box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.07);
    }
    .card-hover {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card-hover:hover {
      transform: translateY(-4px);
      box-shadow: 0 16px 36px -8px rgba(13, 148, 136, 0.16);
    }
    .glass-nav {
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    }
    .brand-gradient-text {
      background: linear-gradient(135deg, #0D9488 0%, #0284C7 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .brand-gradient-bg {
      background: linear-gradient(135deg, #0D9488 0%, #0284C7 100%);
    }
    details summary::-webkit-details-marker {
      display: none;
    }