*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--bg:#fff;--fg:#171717;--muted:#6b7280;--border:#e5e7eb;--card:#f8fafc;--primary:#2563eb;--primary-hover:#1d4ed8;--danger:#ef4444;--radius:8px}html{scroll-behavior:smooth;font-size:16px}body{background:var(--bg);color:var(--fg);-webkit-font-smoothing:antialiased;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.6}a{color:inherit;text-decoration:none}@keyframes spin{to{transform:rotate(360deg)}}.btn{border-radius:var(--radius);cursor:pointer;border:none;justify-content:center;align-items:center;gap:6px;padding:8px 16px;font-size:.875rem;font-weight:500;transition:background .15s,opacity .15s;display:inline-flex}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--primary-hover)}.btn-ghost{color:var(--fg);background:0 0}.btn-ghost:hover:not(:disabled){background:var(--card)}.btn-danger{background:var(--danger);color:#fff}.input{border:1px solid var(--border);border-radius:var(--radius);background:var(--bg);width:100%;color:var(--fg);outline:none;padding:8px 12px;font-size:.875rem;transition:border-color .15s;display:block}.input:focus{border-color:var(--primary);box-shadow:0 0 0 3px #2563eb1a}.label{color:var(--fg);margin-bottom:4px;font-size:.8125rem;font-weight:500;display:block}.card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:20px}.error-text{color:var(--danger);margin-top:4px;font-size:.8125rem}