body {
    Max-width: 90vw;
    height: 95vh;
    margin-left: 30px;
    padding: 0;
    background-color: rgb(13, 163, 151);
    background: url(../Img/predio.jpg) no-repeat center center;
    background-position: center;
    background-size: cover;
    filter: opacity(0.9);
    font-weight: bold;
    font-size: large;
    color: honeydew;
    overflow-y: hidden;
}
.red {
    color: red;
}
 
footer {
    position: fixed;
    width: 100%;
    height: 40px;
    line-height: 40px;
    vertical-align: middle;
    background-color: black;
    color: white;
    text-align: center;
    bottom: 0;
    left: 0;
}