/* roulang page: index */
:root {
            --brand-primary: #1D4ED8;
            --brand-hover: #1E40AF;
            --brand-bg: #F8FAFC;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--brand-bg);
            color: #0F172A;
            scroll-behavior: smooth;
        }
        .custom-glass {
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }
        .tab-active {
            border-bottom: 2px solid var(--brand-primary);
            color: var(--brand-primary);
        }