:root{--bg-color: #121212;--surface-color: #1e1e1e;--primary-color: #bb86fc;--text-color: #e0e0e0;--text-secondary: #a0a0a0;--success-color: #03dac6;--error-color: #cf6679;--border-radius: 12px}body{margin:0;padding:0;background-color:var(--bg-color);color:var(--text-color);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased}button{cursor:pointer;border:none;border-radius:var(--border-radius);padding:12px 20px;font-weight:600;transition:opacity .2s}button:active{opacity:.8}