:root {
            --bg: #A19EC2;
            --text: Times;
            --accent: #5544E6;
            --border: #ccc;
        }

        .dark {
            --bg: #a1a1a1;
            --text: #6B1EB9;
            --accent: #6B02D6;
            --border: #20063B;
        }

        body {
            margin: 0;
            font-family: Times, sans-serif;
            background: var(--bg);
            color: var(--text);
        }

        header {
            padding: 1rem;
            border-bottom: 2px solid var(--border);
            text-align: center;
        }

        nav {
            display: flex;
            justify-content: center;
            gap: 1rem;
            padding: 0.5rem;
            border-bottom: 1px solid var(--border);
            background: var(--bg);
        }

        nav a {
            text-decoration: none;
            color: var(--text);
            border: 1px solid var(--border);
            padding: 0.25rem 0.5rem;
            border-radius: 1px;
            cursor: pointer;
        }

        nav a:hover {
            background: var(--accent);
            color: var(--bg);
        }

        /* --- Layout --- */
        .container {
            display: grid;
            grid-template-columns: 233px 1fr 200px;
            gap: 1rem;
            max-width: 1457px;
            margin: 1rem auto;
            padding: 1rem;
            border: 2px solid var(--border);
            border-radius: 1px;
            background: var(--bg);
        }

        aside {
            border: 1px solid var(--border);
            padding: 1rem;
            border-radius: 1px;
            background: var(--bg);
        }

        main {
            padding: 1rem;
        }

        section {
            display: none;
            margin-bottom: 2rem;
        }

        .active {
            display: block;
        }

        footer {
            text-align: center;
            padding: 1rem;
            border-top: 1px solid var(--border);
            margin-top: 2rem;
        }

        .theme-toggle {
            position: fixed;
            bottom: 1rem;
            left: 1rem;
            padding: 0.5rem 1rem;
            border: 1px solid var(--border);
            background: var(--bg);
            color: var(--text);
            cursor: pointer;
            border-radius: 1px;
        }

        /* Responsive */
        @media (max-width: 800px) {
            .container {
                grid-template-columns: 1fr;
            }

            aside {
                order: 2;
            }

            main {
                order: 1;
            }
        }