header,
nav,
footer {
    
    border: solid 2px;
    color: rgb(0, 0, 0);
}

header {
    font-size: 50px;
    text-align: center;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}

nav {
    height: 7vh;
    font-size: 3.5vh;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    text-align: center;
    text-decoration: none;
    color: black;
}

footer {
    font-size: 2vh;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}