.btn-whatsapp{
    position: fixed;
    right: 4%;
    bottom: 1%;
    z-index: 999;
}

.btn-whatsapp img {
width: 50px;
}

.up{
    position: fixed;
    right: 1%;
    bottom: 1%;
    z-index: 999;
}

.up img {
width: 50px;

}

.bienvenido {
    color: #fff;

    font-size: 72px;

    font-family: 'Raleway', sans-serif;

    font-weight: 800;
    text-align: center;

}

.welcome {
    text-align: center;

            color: #fff;

            font-size: 50px;

            font-family: 'Raleway', sans-serif;

            line-height: 80px;

            font-weight: 300;
}

@media only screen and (max-width: 479px){
    .btn-whatsapp{
        position: fixed;
        right: 20%;
        bottom: 3%;
        z-index: 999;
} 
.bienvenido {
    font-size: 45px;
}

.welcome {
    font-size: 30px;
}


.btn-whatsapp img {
width: 40px;
}

.up{
    position: fixed;
    right: 6%;
    bottom: 3%;
    z-index: 999;
}

.up img {
width: 40px;

}
}