:root {
            --bg-dark: #0F0F1E;
            --bg-light: #1A1A2E;
            --neon-green: #39FF14;
            --electric-blue: #00D1FF;
            --orange-accent: #FF6B35;
            --text-gray: #CCCCCC;
        }

        body {
            font-family: 'Share Tech Mono', monospace;
            background: var(--bg-dark);
            color: var(--text-gray);
            overflow-x: hidden;
            scroll-behavior: smooth;
        }

        /* --- Pure CSS/SVG Background Patterns (No Images) --- */
        .bg-pattern {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            background: radial-gradient(circle at 50% 50%, var(--bg-light), var(--bg-dark));
        }

        .grid-layer {
            position: absolute;
            inset: 0;
            background-image: 
                linear-gradient(rgba(57, 255, 20, 0.05) 1px, transparent 1px),
                linear-gradient(90deg, rgba(57, 255, 20, 0.05) 1px, transparent 1px);
            background-size: 50px 50px;
            transform: perspective(500px) rotateX(45deg);
            animation: moveGrid 20s linear infinite;
        }

        @keyframes moveGrid {
            0% { background-position: 0 0; }
            100% { background-position: 0 500px; }
        }

        /* --- UI Components --- */
        .neon-border {
            border: 1px solid rgba(57, 255, 20, 0.3);
            box-shadow: 0 0 15px rgba(57, 255, 20, 0.1);
            transition: all 0.3s ease;
        }

        .neon-border:hover {
            border-color: var(--neon-green);
            box-shadow: 0 0 25px rgba(57, 255, 20, 0.3);
        }

        .neon-text {
            color: var(--neon-green);
            text-shadow: 0 0 10px rgba(57, 255, 20, 0.5);
        }

        .btn-cyber {
            background: transparent;
            border: 1px solid var(--electric-blue);
            color: var(--electric-blue);
            padding: 12px 24px;
            text-transform: uppercase;
            font-weight: bold;
            position: relative;
            overflow: hidden;
            transition: 0.3s;
        }

        .btn-cyber:hover {
            background: var(--electric-blue);
            color: black;
            box-shadow: 0 0 20px var(--electric-blue);
        }

        .ticker-wrap {
            background: rgba(0, 0, 0, 0.9);
            border-bottom: 1px solid rgba(57, 255, 20, 0.2);
            overflow: hidden;
            white-space: nowrap;
        }

        .ticker-content {
            display: inline-block;
            animation: tickerScroll 40s linear infinite;
            padding: 8px 0;
            font-size: 0.75rem;
            color: var(--neon-green);
        }

        @keyframes tickerScroll {
            0% { transform: translateX(100%); }
            100% { transform: translateX(-100%); }
        }

        .view-section { display: none; }
        .view-section.active { display: block; animation: fadeIn 0.6s ease; }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .gauge-container {
            width: 150px;
            height: 75px;
            border: 2px solid #222;
            border-bottom: none;
            border-radius: 100px 100px 0 0;
            position: relative;
            overflow: hidden;
        }

        .gauge-needle {
            position: absolute;
            bottom: 0;
            left: 50%;
            width: 4px;
            height: 100%;
            background: var(--neon-green);
            transform-origin: bottom center;
            transition: transform 1s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* Technical SVG Icons (Base64/Pure SVG) */
        .icon-node {
            width: 48px;
            height: 48px;
            fill: none;
            stroke: var(--neon-green);
            stroke-width: 1.5;
        }

        .chapter-card {
            background: rgba(0, 0, 0, 0.4);
            border-left: 4px solid var(--electric-blue);
            padding: 2rem;
            margin-bottom: 2rem;
        }