body { 
        background: url(../Images/img7.png) no-repeat center center fixed; 
        -webkit-background-size: cover;
        -moz-background-size: cover;
        -o-background-size: cover;
        background-size: cover;          
    }

@media only screen and (max-width: 767px) {
  body {
    background-image: url(../Images/tapizResponsivo.png);
  }
}

.buttonEnviar {
    background-color: #A67D65;
    color: #FFFFFF;
    border: 1px solid #C1BAAA;
    padding: 10px 28px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 14px;
    -webkit-transition-duration: 0.4s; /* Safari */
    transition-duration: 0.4s;
    width: 120px;
}

    .buttonEnviar:hover {
        background-color: #FFFFFF;
        color: #C1BAAA;
        border: 1px solid #C1BAAA;
    }