 

#chk_container * {
  box-sizing: border-box;
}

#chk_container {
  margin: 0 auto;
  display: block;
  margin-top: 0px;
  width: 34px;
/*  height: 41px; */
 
  border-radius: 5px;
  position: relative;
 
    color: #6e6e6e;
    display: inline-block;
    text-shadow: 0 1px 0 #fff;
    -webkit-transition: border-color .218s;
    -moz-transition: border .218s;
    -o-transition: border-color .218s;
    transition: border-color .218s;
    background: #f3f3f3;
    background: -webkit-gradient(linear,0% 40%,0% 70%,from(#F5F5F5),to(#F1F1F1));
    background: -moz-linear-gradient(linear,0% 40%,0% 70%,from(#F5F5F5),to(#F1F1F1));
    border: solid 1px #b3b3b3;
    border-radius: 5px;
    -webkit-border-radius: 5px;
    -moz-border-radius: 5px;
 
}
#chk_container label {
   
  width: 42px;
  z-index: 0;
  display: inline-block;
  position: absolute;
  top: 0;
  left: 0;
}
#chk_container label div {
  height:20px;
  width: 20px;
  border: solid 3px rgba(255, 0, 0, 0.6);
  margin: 6px;
  border-radius: 50%;
  transform: rotate(45deg);
  transition: all 100ms ease-in-out, border 50ms ease 100ms;
}
#chk_container input {
  height:30px;
  width: 32px;
  margin: 0;
  opacity: 0;
  z-index: 1;
  position: relative;
  cursor: pointer;
}
#chk_container input:checked + label > div {
  border-radius: 0px;
  border:4px solid green;
  border-top: 0;
  border-left: 0;
  height: 16px;
  width: 10px;
  margin-top: 7px;
  margin-left: 11px;
  transform: rotate(40deg);
  transition: all 150ms ease-in-out;
}

#chk_container:hover {
    color: #333;
    border-color: #999;
    -moz-box-shadow: 0 2px 0 rgba(0, 0, 0, 0.3); 
	-webkit-box-shadow:0 2px 5px rgba(0, 0, 0, 0.3);
    box-shadow: 2px 2px 5px rgba(0, 0, 0, 0.15);
}