:root{--bg: #0f1419;--surface: #1a2332;--border: #2d3a4d;--text: #e6edf3;--text-muted: #8b949e;--accent: #58a6ff;--success: #3fb950;--error: #f85149;font-family:system-ui,-apple-system,sans-serif;line-height:1.5}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);min-height:100vh}#root{min-height:100vh;padding:1.5rem}input,select,button{font:inherit;color:var(--text);background:var(--surface);border:1px solid var(--border);border-radius:6px;padding:.5rem .75rem;margin-right:.5rem;margin-top:.25rem}input:focus,select:focus,button:focus{outline:2px solid var(--accent);outline-offset:2px}button:hover:not(:disabled){background:var(--border)}button:disabled{opacity:.6;cursor:not-allowed}label{display:block;margin-bottom:.25rem;font-weight:500}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}