/* roulang page: index */
:root {
            --brand-primary: #1A56DB;
            --brand-teal: #0D9488;
            --brand-orange: #F97316;
            --bg-light: #F8FAFC;
            --text-main: #0F172A;
            --text-muted: #64748B;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: #334155;
            background-color: #F8FAFC;
        }
        .custom-card-shadow {
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05), 0 20px 25px -5px rgba(0, 0, 0, 0.02);
            transition: all 0.25s ease-in-out;
        }
        .custom-card-shadow:hover {
            box-shadow: 0 10px 15px -3px rgba(26, 86, 219, 0.08);
            transform: translateY(-3px);
        }
        details summary::-webkit-details-marker {
            display: none;
        }
        details[open] summary svg {
            transform: rotate(180deg);
        }