.button {
    display: inline-block;
    padding: 5px 8px;
    font-size: 15px;
    cursor: pointer;
    text-align: center;
    text-decoration: none;
    outline: none;
    color: #fff;
    background-color: #607d8b;
    border: none;
}
.button:hover {background-color: #9E9E9E}

.button:active {
    background-color: #9E9E9E;
    box-shadow: 0 5px #666;
    transform: translateY(4px);
}

input[type=checkbox] {
    transform: scale(1.5);
}

#google_login {
    width: 45%;
    position: relative;
    display: inline-block;
}

.social_auth .img-normal {
    display: inline;
}

.social_auth .img-focus {
    display: none;
}

.social_auth .img-pressed {
    display: none;
}

.social_auth:hover .img-normal {
    display: none;
}

.social_auth:hover .img-focus {
    display: inline;
}

.social_auth:hover .img-pressed {
    display: none;
}

.social_auth:active .img-normal {
    display: none;
}

.social_auth:active .img-focus {
    display: none;
}

.social_auth:active .img-pressed {
    display: inline;
}