.kotb{max-width:520px;border:1px solid #e5e7eb;border-radius:10px;padding:14px;background:#fff}
.kotb-label{display:block;font-weight:600;margin-bottom:8px}
.kotb-row{display:flex;gap:10px;align-items:stretch}
.kotb-input{flex:1;padding:10px 12px;border:1px solid #cbd5e1;border-radius:8px;font-size:16px}
.kotb-call{display:inline-flex;align-items:center;justify-content:center;padding:10px 14px;border-radius:8px;text-decoration:none;border:1px solid #0ea5e9;background:#0ea5e9;color:#fff;font-weight:700;white-space:nowrap}
.kotb-call:hover{filter:brightness(0.95)}
.kotb-hint{margin-top:8px;color:#475569;font-size:13px}
.kotb-msg{margin-top:10px;color:#b91c1c;font-size:13px;min-height:1em}