*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

html,
body{
    width:100%;
    background:#efefef;
    font-family:Arial, Helvetica, sans-serif;
}

/* CONTENEDOR PRINCIPAL */

.contenedor{
    width:100%;
    max-width:2160px;
    margin:0 auto;
    position:relative;
}

/* IMAGEN PRINCIPAL */

.imagen-principal{
    width:100%;
    display:block;
}

/* CONTENEDOR BOTÓN */

.contenedor-volver{

    width:100%;

    display:flex;

    justify-content:center;

    align-items:center;

    padding:40px 0 60px 0;

    background:#efefef;
}

/* BOTÓN */

.btn-volver{

    background:#c8a52b;

    color:#222;

    text-decoration:none;

    font-weight:bold;

    letter-spacing:.5px;

    padding:18px 35px;

    border-radius:50px;

    transition:all .25s ease;

    box-shadow:0 4px 12px rgba(0,0,0,.15);
}

/* HOVER */

.btn-volver:hover{

    background:#b6921f;

    transform:translateY(-2px);

    box-shadow:0 6px 18px rgba(0,0,0,.20);
}

/* RESPONSIVE */

@media(max-width:900px){

    .contenedor-volver{

        padding:30px 0 50px 0;
    }

    .btn-volver{

        font-size:15px;

        padding:16px 28px;
    }
}

@media(max-width:600px){

    .btn-volver{

        width:80%;

        text-align:center;

        font-size:14px;
    }
}