/* roulang page: index */
:root {
            --primary-blue: #0F3E7A;
            --primary-accent: #1D4ED8;
            --live-green: #059669;
            --alert-red: #DC2626;
            --bg-light: #F8FAFC;
            --bg-muted: #F1F5F9;
            --dark-surface: #0B132B;
            --text-main: #0F172A;
            --text-secondary: #334155;
            --text-muted: #64748B;
            --border-soft: #E2E8F0;
            --card-shadow: 0 10px 30px -5px rgba(15, 23, 42, 0.06);
            --card-shadow-hover: 0 20px 35px -5px rgba(15, 62, 122, 0.12);
        }

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
            color: var(--text-main);
            background-color: var(--bg-light);
        }

        /* Drawer Overlay & Panel Transitions */
        .drawer-overlay {
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .drawer-overlay.active {
            opacity: 1;
            pointer-events: auto;
        }

        .drawer-panel {
            transform: translateX(100%);
            transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .drawer-panel.active {
            transform: translateX(0);
        }

        /* Custom Card Hover */
        .tech-card {
            box-shadow: var(--card-shadow);
            transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
        }
        .tech-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--card-shadow-hover);
            border-color: rgba(29, 78, 216, 0.3);
        }

        /* Pulse Dot for Live Matches */
        .pulse-live {
            position: relative;
        }
        .pulse-live::after {
            content: '';
            position: absolute;
            width: 100%;
            height: 100%;
            top: 0;
            left: 0;
            background-color: inherit;
            border-radius: 50%;
            animation: pulse-ring 1.8s cubic-bezier(0.24, 0, 0.38, 1) infinite;
        }
        @keyframes pulse-ring {
            0% { transform: scale(0.95); opacity: 0.8; }
            100% { transform: scale(2.2); opacity: 0; }
        }

        /* Sticky Bottom Bar */
        #stickyBar {
            transform: translateY(120%);
            transition: transform 0.35s ease-out;
        }
        #stickyBar.show {
            transform: translateY(0);
        }

        /* FAQ Content Max Height */
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, opacity 0.3s ease;
            opacity: 0;
        }
        .faq-item.active .faq-answer {
            max-height: 200px;
            opacity: 1;
        }
        .faq-item.active .faq-chevron {
            transform: rotate(180deg);
        }