:root{--bg-primary: #121212;--bg-card: #1e1e1e;--text-primary: #ffffff;--text-secondary: #b0b0b0;--border-color: #333333;--accent-color: #3b82f6}body.light-theme{--bg-primary: #ffffff;--bg-card: #f9f9f9;--text-primary: #1a1a1a;--text-secondary: #4a4a4a;--border-color: #e0e0e0;--accent-color: #2563eb}body{margin:0;background-color:var(--bg-primary);color:var(--text-primary);font-family:system-ui,-apple-system,sans-serif;transition:background-color .3s,color .3s}