.rsb-form { max-width: 720px; margin: 1rem auto; padding: 1rem; border: 1px solid #e5e7eb; border-radius: 12px; }
.rsb-grid { display:grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 12px; }
.rsb-grid .rsb-span { grid-column: 1 / -1; }
.rsb-form label { display:block; font-weight:600; margin-bottom:6px; }
.rsb-form input, .rsb-form select, .rsb-form textarea { width:100%; padding:8px; border:1px solid #d1d5db; border-radius:8px; }
.rsb-form button { padding:.6rem 1rem; border-radius:10px; }
.rsb-notice { max-width: 720px; margin: 1rem auto; padding:.8rem 1rem; border-radius:10px; }
.rsb-notice.ok { background:#ecfdf5; border:1px solid #10b98133; }
.rsb-notice.err { background:#fef2f2; border:1px solid #ef444433; }
@media (max-width:640px){ .rsb-grid { grid-template-columns: 1fr; } }