#btn-mas {
    display: none;
}

.container {
    position: fixed;
    bottom: 350px;
    right: 10px;
}

.redes a,
.btn-mas img {
    display: block;
    text-decoration: none;
    background: transparent;
    color: transparent;
    width: 65px;
    height: 65px;
    line-height: 45px;
    text-align: center;
    border-radius: 50%;
    box-shadow: 0px 1px 10px rgba(0, 0, 0, 0.4);
    transition: all 500ms ease;
}

.redes a {

    opacity: 0;
    visibility: hidden;
}

#btn-mas:checked ~ .redes a {
    margin-right: 135px;
    opacity: 1;
    visibility: visible;
}

.btn-mas img {
    margin-top: -100px;
    margin-right: 10px;
    cursor: pointer;
    font-size: 23px;
}

#btn-mas:checked ~ .btn-mas img {
    transform: rotate(90deg);
    font-size: 25px;
}

.redes img {

    width: 210px;
}

.btn-mas label {

    background: transparent;
    color: transparent;
}

.redes img {
    border-radius: 20px 0px 0px;
}