:root {
            --brown: #4B2E2B;
            --olive: #41431B;
            --white: #F7F3EE;
            --concrete: #D9D2C3;
        }

        body {
            background-color: #4B2E2B;
            color: var(--brown);
            font-family: 'Inter', sans-serif;
            margin: 0;
            overflow-x: hidden;
        }

        .stencil { 
            font-family: 'Stardos Stencil', system-ui; 
            text-transform: uppercase; 
            letter-spacing: 0.15em; 
        }

        /* Fixed Social Rail */
        .social-rail {
            position: fixed;
            left: 0;
            top: 0;
            bottom: 0;
            width: 80px;
            background-color: var(--brown);
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 2.5rem;
            z-index: 1000;
        }

        .social-icon {
            width: 42px;
            height: 42px;
            border: 1px solid white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            transition: all 0.5s cubic-bezier(0.19, 1, 0.22, 1);
            text-decoration: none;
            font-size: 0.8rem;
        }

        .social-icon:hover {
            background: white;
            color: var(--brown);
            transform: rotate(360deg);
        }

        /* Layout Margins */
        .main-container {
            margin-left: 80px;
            margin-right: 80px;
            position: relative;
        }

        @media (max-width: 1024px) {
            .main-container { margin-left: 0; margin-right: 0; }
            .social-rail { display: none; }
        }

        /* Hero Section */
        .hero {
            height: 100vh;
            background:url('https://i1-c.pinimg.com/736x/9d/fe/ce/9dfece4ae21e97f4bb2bc5ae27b8d1d5.jpg');
            background-size: cover;
            background-position: center;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
            color: white;
        }

        .nav-link {
            position: relative;
            padding-bottom: 5px;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 1px;
            background: white;
            transition: width 0.6s cubic-bezier(0.19, 1, 0.22, 1);
        }

        .nav-link:hover::after {
            width: 100%;
        }

        /* Blueprint Borders */
        .bp-container {
            border: 2px solid white;
            position: relative;
        }

        .bp-split {
            display: grid;
            grid-template-columns: 1fr 1fr;
            border-bottom: 2px solid white;
        }

        /* Button Fill Animation */
        .btn-fill {
            position: relative;
            overflow: hidden;
            z-index: 1;
            transition: color 0.6s ease;
        }

        .btn-fill::before {
            content: '';
            position: absolute;
            top: 0; left: -100%;
            width: 100%; height: 100%;
            background: white;
            z-index: -1;
            transition: left 0.6s cubic-bezier(0.19, 1, 0.22, 1);
        }

        .btn-fill:hover::before {
            left: 0;
        }

        .btn-fill:hover {
            color: var(--olive);
        }

        /* Page Handling */
        .page { display: none; }
        .page.active { display: block; }

        /* Custom Scrollbar */
        ::-webkit-scrollbar { width: 6px; }
        ::-webkit-scrollbar-track { background: var(--white); }
        ::-webkit-scrollbar-thumb { background: var(--brown); }

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

        .floor-option {
            cursor: pointer;
            padding: 1.5rem;
            border-bottom: 1px solid rgba(0,0,0,0.1);
            transition: background 0.3s;
        }
        .floor-option:hover { background: rgba(0,0,0,0.05); }
        .floor-option.selected { background: var(--brown); color: white; }

        #visualizer-img {
            transition: opacity 0.5s ease;
        }