/*====================
     about button
====================*/
.btn {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    position: relative;
    width: 320px;
    height: 45px;
    border: none;
    box-shadow: none;
    width: 150px;
    height: 100%;
    line-height: 42px;
    -webkit-perspective: 230px;
    perspective: 230px;
    cursor: pointer;
    
}

.btn span {
    /*
    background: rgba(55, 201, 120, 1);
    background: linear-gradient(0deg, rgba(55, 201, 120, 1) 0%, rgba(55, 201, 120, 1) 100%);*/
    display: block;
    position: absolute;
    font-weight: 600;
    text-transform: capitalize;
    width: 130px;
    height: 40px;
    box-shadow: 0 0 0.8rem #12f7ff;
    border-radius: 5px;
    margin: 0;
    text-align: center;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    -webkit-transition: all .5s;
    transition: all .5s;
}

.btn span:nth-child(1) {
    box-shadow: 0 0 0.8rem #12f7ff;
    -webkit-transform: rotateX(90deg);
    -moz-transform: rotateX(90deg);
    transform: rotateX(90deg);
    -webkit-transform-origin: 50% 50% -20px;
    -moz-transform-origin: 50% 50% -20px;
    transform-origin: 50% 50% -20px;
}

.btn span:nth-child(2) {
    background: var(--background-color);
    color: var(--hover-color);
   -webkit-transform: rotateX(0deg);
    -moz-transform: rotateX(0deg);
    transform: rotateX(0deg);
    -webkit-transform-origin: 50% 50% -20px;
    -moz-transform-origin: 50% 50% -20px;
    transform-origin: 50% 50% -20px;
}

.btn:hover span:nth-child(1) {
    color: var(--hover-color);
    box-shadow: 0 0 0.8rem #12f7ff;
    -webkit-transform: rotateX(0deg);
    -moz-transform: rotateX(0deg);
    transform: rotateX(0deg);
}

.btn:hover span:nth-child(2) {
    box-shadow: 0 0 0.8rem #12f7ff;
    color: transparent;
    -webkit-transform: rotateX(-90deg);
    -moz-transform: rotateX(-90deg);
    transform: rotateX(-90deg);
}

.btn:nth-child(2) {
    background: var(--background-color);
    color: var(--hover-color);
}

.btn:nth-child(2):hover {
    color: var(--background-color);
}

.btn:nth-child(2)::before {
    background: var(--hover-color);
}