header {
    border: 5px solid #3f0000;
    padding: 20px;
    border-radius: 30px;
    margin-bottom: 30px;
}
main {
    border: 5px solid #830000;
    padding: 10px;
    border-radius: 30px;
}
footer {
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    background-color: #ff3a3a;
    border-top: 5px solid #a00000;
    padding: 20px;
}