.search-submit span {
  width: 24px;
  height: 24px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23fff' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='10.8' cy='10.8' r='6.6'/%3E%3Cpath d='m16 16 4.2 4.2'/%3E%3C/svg%3E") center / 24px 24px no-repeat;
}

.search-submit span::before,
.search-submit span::after {
  display: none !important;
}