.btn2{
    border: none;
    font-family: inherit;
    font-size: 20px;
    color: inherit;
    background: none;
    cursor: pointer; 
    display: inline-block; 
    width:60px;
  height:60px;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 700;
    outline: none;
    position: relative;
    -webkit-transition: all 0.3s;
    -moz-transition: all 0.3s;
    transition: all 0.3s;
  z-index:999;
}
.btn-12{
       border: 3px solid #fff !important;
    color: #fff !important;
}
.btn-12b:hover, .btn-1b:active {
        color: #0545a0 !important;
    background: #fff;
}
.btn-12b:hover:after, .btn-1b:active:after {
    height: 100%;
}
 
.btn-12b:after {
    width: 100%;
    height: 0;
    top: 0;
    left: 0;
    background: #fff;
}
 
.btn2:after {
    content: '';
    position: absolute;
    z-index: -1;
    -webkit-transition: all 0.3s;
    -moz-transition: all 0.3s;
    transition: all 0.3s;
}