.gwv-btn {
  display: block;
  margin: 8px auto 0;      /* centers the button under the row */
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid #d1d5db;
  background: #111;
  color: #fff;
  cursor: pointer;
  font-size: 14px;
  line-height: 1.2;
}

.gwv-btn[disabled] {
  opacity: 0.6;
  cursor: not-allowed;
  background: #f3f4f6;
  color: #6b7280;
}