:root {
            --blue: #6367FF;
            --cyan: #CFECF3;
            --yellow: #FEFD99;
            --black: #1A1A1A;
        }

        body {
            font-family: 'PT Sans', sans-serif;
            background-color: #f8fafc;
            color: var(--black);
            overflow-x: hidden;
        }

        /* Floating Header */
        header {
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            width: 90%;
            left: 5%;
        }
        header.scrolled {
            top: 10px;
            width: 95%;
            left: 2.5%;
            background-color: rgba(99, 103, 255, 0.9);
            backdrop-filter: blur(10px);
            padding: 10px 20px;
        }

        /* Hero Animation */
        .map-bg {
            background-image: radial-gradient(circle at 2px 2px, rgba(255,255,255,0.05) 1px, transparent 0);
            background-size: 40px 40px;
            background-color: var(--blue);
            overflow: hidden;
        }

        .route-line {
            position: absolute;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--yellow), transparent);
            width: 200px;
            animation: moveRoute 4s linear infinite;
            opacity: 0.3;
        }

        @keyframes moveRoute {
            0% { transform: translateX(-200px) translateY(0); opacity: 0; }
            50% { opacity: 0.5; }
            100% { transform: translateX(100vw) translateY(100px); opacity: 0; }
        }

        /* Timeline Progress */
        .timeline-line {
            height: 4px;
            background: rgba(99, 103, 255, 0.1);
            position: relative;
        }
        .timeline-progress {
            position: absolute;
            height: 100%;
            background: var(--blue);
            width: 0%;
            transition: width 2s ease;
        }

        /* Cards */
        .tilted-card {
            transform: rotate(-3deg);
            transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        }
        .tilted-card:hover {
            transform: rotate(0deg) translateY(-15px);
            box-shadow: 0 30px 60px -12px rgba(0,0,0,0.2);
        }

        .asymmetric-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            grid-auto-rows: 200px;
            gap: 20px;
        }

        .card-large { grid-column: span 2; grid-row: span 2; }
        .card-medium { grid-column: span 2; grid-row: span 1; }
        .card-small { grid-column: span 1; grid-row: span 1; }

        /* General Utilities */
        .page-node { display: none; }
        .page-node.active { display: block; animation: fadeIn 0.6s ease-out; }
        @keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

        .reveal { opacity: 0; transform: translateY(30px); transition: all 0.8s ease-out; }
        .reveal.active { opacity: 1; transform: translateY(0); }

        /* Responsive Mobile Nav */
        #mobile-nav { transform: translateX(100%); transition: 0.4s ease-in-out; }
        #mobile-nav.open { transform: translateX(0); }