header #search_submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 40px;
  padding: 0;
  border: 0;
  color: #f5f7fa;
  background: #252b33;
  vertical-align: middle;
  cursor: pointer;
}
header #search_submit svg,
header #search_btn svg {
  display: block;
  flex: none;
  color: #f5f7fa;
}
header #search_btn { color: #f5f7fa; cursor: pointer; }
header #search_btn::before { content: none; }