body {
    background-color: #e9eef3;
    font-family:Arial, Helvetica, sans-serif;
}

.site {
    width: 500px;
    margin: 0 auto;
}

.box1 {
    width: 400px;
    padding: 10px;
    margin: 30px auto;
    border: 3px solid #2c3e50;
    background-color: #d3e5ff;    
}

.box2 {
    width: 400px;
    padding: 30px;
    margin: 50px auto;
    border: 4px dashed #7b2cbf;
    background-color: #ffffff;
}

#box3 {
    width: 400px;
    padding: 5px;
    margin: 50px auto;
    border: 6px double #c1121f;
}

.box4 {
    width: 400px;
    padding: 30px;
    margin: 50px auto;
    border: 4px dashed #7b2cbf;
    background-color: #cff7e8;
    box-sizing: border-box;
}