body {
            margin: 0;
            padding: 0;
            font-family: 'Courier New', Consolas, monospace;
            color: #d0ffe0;
            background: #000;
            line-height: 1.65;
        }
        #tron-bg {
            position: fixed;
            inset: 0;
            z-index: -1;
            opacity: 0.75;               /* bright when idle */
            transition: opacity 1.6s ease-in-out;
            pointer-events: none;
        }
        #tron-bg.dim {
            opacity: 0.18;               /* subtle when interacting */
        }
        .container {
            max-width: 960px;
            margin: 60px auto;
            padding: 0 24px;
            position: relative;
            z-index: 2;
        }
        .section {
            opacity: 0;
            transform: translateY(80px);
            transition: all 0.9s cubic-bezier(0.22, 0.61, 0.36, 1);
            margin: 100px 0;
            padding: 48px 40px;
            background: rgba(0, 12, 20, 0.88);
            border: 1px solid #00d4ff22;
            border-radius: 8px;
            box-shadow: 0 0 40px #00d4ff0d;
        }
        .section.in-view {
            opacity: 1;
            transform: translateY(0);
        }
        h1, h2 {
            color: #00d4ff;
            text-shadow: 0 0 14px #00d4ff99;
            margin-bottom: 0.8em;
        }
        a {
            color: #00d4ff;
            text-decoration: none;
            border-bottom: 1px solid #00d4ff40;
        }
        a:hover {
            border-bottom-color: #00d4ff;
            text-shadow: 0 0 8px #00d4ff;
        }