*{
    padding: 0px;
    margin: 0px;
    box-sizing: border-box;
}
header>h1, main>h2, main>p{
    max-width: 400px;
    margin: auto;
}
header>h1{
    height: 100px;
    background-color: aqua;
    text-align: center;
    padding-top: 20px;
    
}
main>p{
    background-color: beige;
}
main>h2{
    background-color: aquamarine;
}