/* roulang page: index */
:root {
            --primary: #1e40af;
            --accent: #0284c7;
            --bg-light: #f8fafc;
            --surface: #ffffff;
            --text-main: #0f172a;
            --text-body: #334155;
            --text-muted: #64748b;
            --border-color: #e2e8f0;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--bg-light);
            color: var(--text-body);
            line-height: 1.75;
        }
        .card-custom {
            background-color: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: 0.75rem;
            box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.05), 0 1px 2px -1px rgba(0, 0, 0, 0.05);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-custom:hover {
            transform: translateY(-4px);
            box-shadow: 0 10px 15px -3px rgba(30, 64, 175, 0.08), 0 4px 6px -4px rgba(30, 64, 175, 0.04);
            border-color: #cbd5e1;
        }
        .glass-header {
            backdrop-filter: blur(12px);
            background-color: rgba(255, 255, 255, 0.92);
        }