.btn-open {
    display: inline-block;
    width: 400px;
    height:150px;
    text-align: center;
    font-size: 30px;
    line-height:110px;
    text-decoration: none;
    font-weight: bold;
    position: relative;
    overflow: hidden;
    z-index: 1;
    text-decoration: none!important;
    margin: 0 30px 30px;
}
.btn-open p {
    position: absolute;
    top: 50px;
    left: 0;
    text-align: center;
    font-size: 20px;
    width: 100%;
}
.btn-open {
    background-color: none;
    border: 2px solid #ffd667;
    color: #ffd667;
}
.btn-open:after{
    width: 100%;
    height: 0;
    content:"";
    position: absolute;
    top: 50%;
    left: 50%;
    opacity: 0;
    transform: translateX(-50%) translateY(-50%);
    transition: .3s;
    z-index: -1;
}
.btn-open:after {
    background : #ffd667;
}

a.btn-open:hover {
    color: #fff!important;
}

.btn-open:hover:after{
    height: 240%;
    opacity: 1;
    color: #fff;
}
.btn-open:active:after{
    height: 340%;
    opacity: 1;
}
.btn-open.grayout {
    background-color: #f8fafc!important;
    color: #d6d6d6!important;
    border: 2px solid #d6d6d6!important;
}
.btn-open.grayout:hover{
    color: #d6d6d6!important;
}
.btn-open.grayout:hover:after{
    height: 0!important;
}
.btn-open.grayout:active:after{
    height: 0!important;
}
@media screen and (max-width: 767px){
    .btn-open {
        width: 90%;
        height: 65px;
        text-align: center;
        font-size: 1.2rem;
        line-height: 2rem;
        text-decoration: none;
        font-weight: bold;
        position: relative;
        overflow: hidden;
        z-index: 1;
        text-decoration: none!important;
        margin: 0 20px 30px;
    }
    .btn-open p {
        position: absolute;
        top: 30px;
        left: 0;
        text-align: center;
        font-size: 1rem;
        width: 100%;
    }
    .btn-open:after{
        transition: 0s;
    }
}