*{
    box-sizing: border-box;
}

header {
    max-width:1000px;
    min-height:80px;
    padding:20px;
    margin: 10px auto;
    background-color:blue;
}
div#logo{
    width:100px;
    line-height:50px;
    color:yellowgreen;
    font-weight: 900;
    font-size: 30px;
    text-align: center;
    background-color:azure;
}