:root{--primary-color: #3b82f6;--secondary-color: #8b5cf6;--bg-color: #ffffff;--surface-color: #f8fafc;--text-color: #1e293b;--text-secondary: #64748b;--border-color: #e2e8f0;--error-color: #ef4444;--success-color: #10b981;--warning-color: #f59e0b}[data-theme=dark]{--bg-color: #0f172a;--surface-color: #1e293b;--text-color: #f1f5f9;--text-secondary: #cbd5e1;--border-color: #334155}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background-color:var(--bg-color);color:var(--text-color);line-height:1.6}button{cursor:pointer;font-family:inherit}input,textarea,select{font-family:inherit}#app{min-height:100vh}