body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:#f5f6f8;color:#1f2937}.container{max-width:640px;margin:32px auto;padding:24px;background:#fff;border-radius:8px;box-shadow:0 1px 3px #00000014}h1{margin-top:0;font-size:1.5rem}.form{display:flex;flex-direction:column;gap:16px}.field{display:flex;flex-direction:column;gap:4px}.field label{font-weight:600;font-size:.95rem}.field input,.field select{padding:8px 10px;border:1px solid #cbd5e1;border-radius:4px;font-size:1rem}.field-error{color:#b91c1c;font-size:.85rem;min-height:1em}.form-success{padding:12px;background:#d1fae5;color:#065f46;border-radius:4px}.form-error{padding:12px;background:#fee2e2;color:#991b1b;border-radius:4px}.button{padding:10px 16px;background:#2563eb;color:#fff;border:0;border-radius:4px;font-size:1rem;cursor:pointer}.button:disabled{background:#94a3b8;cursor:not-allowed}.spinner{display:inline-block;width:14px;height:14px;border:2px solid #ffffff;border-top-color:transparent;border-radius:50%;animation:spin .8s linear infinite;vertical-align:middle;margin-right:8px}@keyframes spin{to{transform:rotate(360deg)}}