/* --- ADMIN PANEL GRUNDLAGEN & VARIABLEN --- */
        :root {
            --admin-bg: #0A192F;
            --admin-surface: #172A45;
            --admin-sidebar-bg: #020412;
            --color-text: #E0E0E0;
            --color-text-muted: #8892b0;
            --color-gold: #D4AF37;
            --color-glow-blue: #00BFFF;
            --font-heading: 'Orbitron', sans-serif;
            --font-body: 'Roboto', sans-serif;
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body {
            font-family: var(--font-body);
            background-color: var(--admin-bg);
            color: var(--color-text);
            background-image: url('https://www.transparenttextures.com/patterns/stardust.png');
        }

        /* --- ADMIN LAYOUT (SIDEBAR + CONTENT) --- */
        .admin-layout {
            display: flex;
            min-height: 100vh;
        }
        .admin-sidebar {
            width: 250px;
            background-color: var(--admin-sidebar-bg);
            padding: 2rem 1rem;
            display: flex;
            flex-direction: column;
            flex-shrink: 0;
        }
        .admin-sidebar .logo {
            font-family: var(--font-heading);
            font-size: 1.2rem;
            text-align: center;
            margin-bottom: 3rem;
        }
        .admin-sidebar .logo span {
            display: block;
            font-size: 0.8rem;
            color: var(--color-text-muted);
        }
        .admin-sidebar nav a {
            display: flex;
            align-items: center;
            gap: 1rem;
            color: var(--color-text-muted);
            text-decoration: none;
            padding: 1rem;
            border-radius: 5px;
            margin-bottom: 0.5rem;
            transition: all 0.3s;
        }
        .admin-sidebar nav a:hover {
            background-color: var(--admin-surface);
            color: white;
        }
        .admin-sidebar nav a.active {
            background-color: var(--admin-surface);
            color: white;
            border-left: 3px solid var(--color-gold);
        }
        .admin-content {
            flex-grow: 1;
            padding: 3rem;
        }
        .admin-content h1 {
            font-family: var(--font-heading);
            font-size: 2.5rem;
            margin-bottom: 2rem;
        }

        /* --- DASHBOARD-SPEZIFISCHE STYLES --- */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 1.5rem;
            margin-bottom: 2rem;
        }
        .stat-card {
            background: var(--admin-surface);
            padding: 1.5rem;
            border-radius: 8px;
        }
        .stat-card .label { font-size: 0.9rem; color: var(--color-text-muted); margin-bottom: 0.5rem; }
        .stat-card .value { font-family: var(--font-heading); font-size: 2.2rem; font-weight: bold; }
        .stat-card .comparison { font-size: 0.8rem; color: #00FF7F; }
        .stat-card.highlight { border: 1px solid var(--color-glow-blue); }

        .charts-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
        }
        .chart-card {
            background: var(--admin-surface);
            padding: 1.5rem;
            border-radius: 8px;
        }
        .chart-card h2 { font-size: 1.1rem; margin-bottom: 1rem; }
        .chart-card img { width: 100%; height: auto; opacity: 0.8; }