:root{color-scheme:light;--bg: #f7f7f6;--surface: #ffffff;--border: #e4e4e2;--text: #1a1a1a;--text-muted: #6b6b6b;--accent: #2563eb;--accent-hover: #1d4ed8;--danger: #dc2626;font-family:-apple-system,Segoe UI,Roboto,Arial,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text)}button{font-family:inherit;cursor:pointer}input,select,textarea{font-family:inherit;font-size:14px;padding:8px 10px;border:1px solid var(--border);border-radius:6px;background:var(--surface);color:var(--text)}.btn-primary{background:var(--accent);color:#fff;border:none;padding:9px 16px;border-radius:6px;font-size:14px;font-weight:600}.btn-primary:hover{background:var(--accent-hover)}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-secondary{background:transparent;color:var(--text-muted);border:1px solid var(--border);padding:8px 14px;border-radius:6px;font-size:14px}.error-text{color:var(--danger);font-size:13px}