:root {
            --bg-color: #0a0f1e;
            --surface-color: #111827;
            --surface-hover: #1a2332;
            --border-color: #1f2937;
            --text-primary: #f1f5f9;
            --text-secondary: #94a3b8;
            --text-muted: #64748b;
            --primary-color: #6366f1;
            --primary-hover: #4f46e5;
            --primary-glow: rgba(99, 102, 241, 0.25);
            --danger-color: #ef4444;
            --danger-hover: #dc2626;
            --success-color: #10b981;
            --success-glow: rgba(16, 185, 129, 0.3);
            --warning-color: #f59e0b;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --glass-bg: rgba(17, 24, 39, 0.85);
            --glass-border: rgba(255, 255, 255, 0.06);
            --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.4);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        [data-theme="light"] {
            --bg-color: #f0f2f5;
            --surface-color: #ffffff;
            --surface-hover: #f8fafc;
            --border-color: #e2e8f0;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --glass-bg: rgba(255, 255, 255, 0.9);
            --glass-border: rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.08);
        }

        * { box-sizing: border-box; margin: 0; padding: 0; }

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            background-color: var(--bg-color);
            color: var(--text-primary);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            transition: background-color var(--transition), color var(--transition);
            overflow-x: hidden;
        }