body {
    margin: 0; 
    padding: 0; 
    font-size: 18px; 
}
menu {
    width: 300px; 
    padding: 10px; 
    margin: 10px; 
    border: 5px solid red; 
}

header {
    background: #99c; 
    height: 50vh; 
}

h1 {
    font-size: 1.5rem; 
}

.extras {
    font-size: 12px; 
    width: 400px; 
    background: #9c9
}