header,
nav,
section,
footer {
    background-color: brown;
    color: blue;
    width: 100px;
    padding: 20px;
    margin: 4px;
    border-width: 5px;
    border-style: groove;
    border-color: blue;
    border-radius: 100px;
}

.container {
    background-color: azure;

}

.tag {
    color: azure;
}