.masterhead {
    height: 100vh;
    min-height: 1300px;
    background-image: url('https://source.unsplash.com/BtbjCFUvBXs/1920x1080');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.myordermain {
    height: 100vh;
    min-height: 800px;
}

.centeronpage {
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

nav {
    text-align:center;
}