.btn {
    position: relative;

    display: block;
    padding: 30px;

    overflow: hidden;

    border-width: 0;
    outline: none;
    border-radius: 2px;
    box-shadow: 0 5px 7px rgba(43, 45, 196, 0.6);

    background-color: rgba(107, 16, 138, 0.85);
    color: #ecf0f1;
    font-size: 4rem;

    transition: background-color .3s;
}