body {
            font-family: 'Urbanist', sans-serif;
            background-color: #fff;
            color: #000;
            overflow-x: hidden;
            scroll-behavior: smooth;
        }

        /* THE 3-LINE GRID SYSTEM */
        .grid-container {
            position: relative;
            width: 100%;
        }
        .v-line {
            position: absolute;
            width: 1px;
            background: rgba(0,0,0,0.15);
            top: 0;
            bottom: 0;
            height: 0;
            transition: height 1.8s cubic-bezier(0.19, 1, 0.22, 1);
            z-index: 5;
        }
        .v-line.white-line { background: rgba(255,255,255,0.3); }
        .v-line.blue-line { background: #3852B4; }
        
        .active .v-line { height: 100%; }

        /* Core Grid Positions */
        .line-left { left: 15%; }
        .line-center { left: 50%; }
        .line-right { left: 85%; }

        /* FIXED BACKGROUNDS */
        .fixed-bg {
            background-attachment: fixed;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        /* NAVIGATION CIRCLES */
        .nav-btn {
            width: 100px;
            height: 100px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: #fff;
            color: #000;
            font-size: 11px;
            font-weight: 800;
            text-transform: uppercase;
            letter-spacing: 0.1em;
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            cursor: pointer;
            border: 1px solid rgba(0,0,0,0.1);
            pointer-events: auto;
        }
        .nav-btn:hover {
            transform: scale(1.1);
            box-shadow: 0 15px 35px rgba(56, 82, 180, 0.2);
            background: #3852B4;
            color: #fff;
            border-color: #3852B4;
        }

        /* TYPOGRAPHY REVEAL */
        .reveal-up {
            opacity: 0;
            transform: translateY(30px);
            transition: all 1s ease-out;
        }
        .active .reveal-up {
            opacity: 1;
            transform: translateY(0);
        }

        /* PAGE ENGINE */
        .page {
            display: none;
            opacity: 0;
            transition: opacity 0.6s ease;
        }
        .page.active {
            display: block;
            opacity: 1;
        }

        /* VIDEO CARDS */
        .video-card {
            transition: all 0.5s ease;
        }
        .video-card:hover {
            transform: scale(1.05);
            background: rgba(255,255,255,0.2);
        }

        /* CUSTOM SCROLLBAR */
        ::-webkit-scrollbar { width: 4px; }
        ::-webkit-scrollbar-track { background: #fff; }
        ::-webkit-scrollbar-thumb { background: #3852B4; }

        /* FADE SYSTEMS */
        .fade-blue-white {
            background: linear-gradient(to bottom, #3852B4 0%, #ffffff 100%);
        }
        .fade-white-blue {
            background: linear-gradient(to bottom, #ffffff 0%, #3852B4 100%);
        }