/* roulang page: index */
:root {
      --primary: #10B981;
      --primary-light: #00F0A8;
      --secondary: #0F172A;
      --accent: #FF6B35;
      --bg-page: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #475569;
      --border-color: rgba(226, 232, 240, 0.8);
      --shadow-sm: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
      --shadow-hover: 0 20px 25px -5px rgba(16, 185, 129, 0.12), 0 8px 10px -6px rgba(16, 185, 129, 0.08);
    }
    * { box-sizing: border-box; }
    body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; background-color: var(--bg-page); color: var(--text-main); line-height: 1.6; }
    .card-hover { transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.25s cubic-bezier(0.4, 0, 0.2, 1); }
    .card-hover:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
    details summary::-webkit-details-marker { display: none; }