:root{--blue: #3b82f6;--ink: #1f2937;--muted: #6b7280;--line: #d1d5db}*{box-sizing:border-box}body{margin:0;padding:32px 16px;background:#f4f5f7;color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;display:flex;justify-content:center}.card{background:#fff;border-radius:12px;box-shadow:0 1px 3px #00000014;max-width:560px;padding:32px;width:100%}h1{font-size:20px;margin:0 0 8px}.muted{color:var(--muted);font-size:14px;margin:0 0 24px}label{display:block;font-size:13px;font-weight:600;margin:16px 0 6px}input[type=text],input[type=date]{border:1px solid var(--line);border-radius:6px;font-size:15px;padding:10px;width:100%}canvas{border:1px solid var(--line);border-radius:6px;display:block;touch-action:none;width:100%}.row{align-items:center;display:flex;gap:12px;justify-content:space-between;margin-top:24px}button{background:var(--blue);border:none;border-radius:6px;color:#fff;cursor:pointer;font-size:15px;padding:12px 24px}button:disabled{background:var(--line);cursor:not-allowed}button.link{background:none;color:var(--muted);padding:12px 0;text-decoration:underline}.error{color:#b91c1c;font-size:14px;margin-top:12px}