body {
    background-color: #61B7CF;
    color: #025167;
}

header, main, footer {
    width: 1024px;
    margin: 16px auto;
    display: flex;
    padding: 16px;
    border-radius: 16px;
    background-color: #fff;
    
}
.cage {
    width: 25%;
    height: 200px;

}
.big-cage {
    width: 50%;
    height: 400px;
}
.mid-cage {
    width: 33%;
    height: 250px;

}

img {
    width: 100%;
}