/* roulang page: index */
:root {
            --brand-primary: #0F766E;
            --brand-accent: linear-gradient(135deg, #14B8A6 0%, #0284C7 100%);
            --bg-page: #F8FAFC;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--bg-page);
            color: #1E293B;
            overflow-x: hidden;
        }
        .btn-gradient {
            background: linear-gradient(135deg, #14B8A6 0%, #0F766E 100%);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .btn-gradient:hover {
            background: linear-gradient(135deg, #0F766E 0%, #115E59 100%);
            box-shadow: 0 10px 20px -5px rgba(15, 118, 110, 0.4);
            transform: translateY(-2px);
        }
        .card-elevated {
            transition: all 0.3s ease;
        }
        .card-elevated:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 32px -8px rgba(15, 118, 110, 0.12);
        }