input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  vertical-align: middle;
  width: 20px;
  height: 20px;
  border: 2px solid #ccc;
  border-radius: 6px;
  background-color: #fff;
  cursor: pointer;
  position: relative;
  transition: all 0.2s ease;
}

input[type="checkbox"]:checked {
  background-color: #5b8cc5;
  border-color: #5b8cc5;
}

input[type="checkbox"]:checked::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 2px;
  width: 4px;
  height: 10px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}