/* Hide the default checkbox */
.container input {
  position: absolute;
  opacity: 0;
  cursor: pointer;
  height: 0;
  width: 0;
}

.container {
  display: block;
  position: relative;
  cursor: pointer;
  font-size: 20px;
  user-select: none;
}

.checkmark {
  position: relative;
  top: 0;
  left: 0;
  height: 1.3em;
  width: 1.3em;
}

.checkmark span {
  width: 32px;
  height: 2px;
  background-color: white;
  position: absolute;
  transition: all 0.3s ease-in-out;
  -webkit-transition: all 0.3s ease-in-out;
  -moz-transition: all 0.3s ease-in-out;
  -ms-transition: all 0.3s ease-in-out;
  -o-transition: all 0.3s ease-in-out;
}

.checkmark span:nth-child(1) {
  top: 10%;
}

.checkmark span:nth-child(2) {
  top: 50%;
}

.checkmark span:nth-child(3) {
  top: 90%;
}

.container input:checked + .checkmark span:nth-child(1) {
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
  -webkit-transform: translateY(-50%) rotate(45deg);
  -moz-transform: translateY(-50%) rotate(45deg);
  -ms-transform: translateY(-50%) rotate(45deg);
  -o-transform: translateY(-50%) rotate(45deg);
}

.container input:checked + .checkmark span:nth-child(2) {
  top: 50%;
  transform: translateY(-50%) rotate(-45deg);
  -webkit-transform: translateY(-50%) rotate(-45deg);
  -moz-transform: translateY(-50%) rotate(-45deg);
  -ms-transform: translateY(-50%) rotate(-45deg);
  -o-transform: translateY(-50%) rotate(-45deg);
}

.container input:checked + .checkmark span:nth-child(3) {
  transform: translateX(-50px);
  -webkit-transform: translateX(-50px);
  -moz-transform: translateX(-50px);
  -ms-transform: translateX(-50px);
  -o-transform: translateX(-50px);
  opacity: 0;
}