.arrow {
    position: absolute;
    top: 50%;
    left: 50%;
    margin-top: -30px;
    margin-left: -60px;
    display: inline-block;
    font-size: 20px;
    color: #33ff66;
    text-align: center;
    width: 90px;
    height: 60px;
    line-height: 60px;
    border: 5px solid #33ff66;
    overflow: hidden;
    text-transform: uppercase;
    cursor: pointer;
    transition: width 0.5s ease-in-out, margin 0.5s ease-in-out, border-radius 0.25s ease-in-out, color 0.25s ease-in-out;
    border-radius: 30px;
}
.arrow:hover, .arrow.auto {
    width: 60px;
    margin-left: -30px;
    border-radius: 40px;
    color: rgba(179, 195, 58, 0);
    transition: width 0.5s ease-in-out, margin 0.5s ease-in-out, border-radius 1s 0.25 ease-in-out, color 0.25s ease-in-out 0.25s;
}
.arrow:hover:before, .arrow.auto:before {
    animation: lineUp 1s cubic-bezier(0, 0.6, 1, 0.4) infinite 0.5s;
}
.arrow:hover:after, .arrow.auto:after {
    animation: tipUp 1s cubic-bezier(0, 0.6, 1, 0.4) infinite 0.5s;
}
.arrow:before {
    position: absolute;
    display: inline-block;
    content: "";
    background: #33ff66;
    width: 5px;
    height: 40px;
    top: 50%;
    left: 50%;
    margin-top: -8px;
    margin-left: -5px;
    transform: translateY(50px);
}
.arrow:after {
    position: absolute;
    display: inline-block;
    content: "";
    width: 20px;
    height: 20px;
    color: #33ff66;
    border-top: 5px solid;
    border-left: 5px solid;
    transform: rotateZ(45deg);
    top: 50%;
    left: 50%;
    margin-top: -8px;
    margin-left: -12px;
    transform: translateY(50px) rotateZ(45deg);
}

@keyframes tipUp {
    0% {
        transform: translateY(50px) rotateZ(45deg);
    }
    100% {
        transform: translateY(-70px) rotateZ(45deg);
    }
}
@keyframes lineUp {
    0% {
        transform: translateY(50px);
    }
    100% {
        transform: translateY(-70px);
    }
}