:root{color-scheme:light;font-family:system-ui,-apple-system,sans-serif}body{margin:0;background:#f7f5f2;color:#222}.page{max-width:640px;margin:0 auto;padding:2rem 1.5rem}.page-narrow{max-width:360px}.page-header{display:flex;align-items:center;justify-content:space-between}form{display:flex;flex-direction:column;gap:.75rem}label{display:flex;flex-direction:column;gap:.25rem;font-weight:600}input,select{font:inherit;padding:.5rem;border:1px solid #ccc;border-radius:4px}button{font:inherit;padding:.5rem 1rem;border:none;border-radius:4px;background:#2f6f4f;color:#fff;cursor:pointer}button:disabled{opacity:.6;cursor:default}.error{color:#b3261e}