header {
    display: none;
    position: fixed;
    width: 100vh;
    height: 50px;
    padding: 10px 0;
    margin: 0;
    bottom: -70px;
    left: 0;
    -webkit-transform: rotate(-90deg);
    -webkit-transform-origin: top left;
    -moz-transform: rotate(-90deg);
    -moz-transform-origin: top left;
    -o-transform: rotate(-90deg);
    -o-transform-origin: top left;
    -ms-transform: rotate(-90deg);
    -ms-transform-origin: top left;
    transform: rotate(-90deg);
    transform-origin: top left;
}

header a {
    border-bottom: none;
}

header a:hover {
    border-bottom: none;
}

header a:active {
    border-bottom: none;
}

header ul {
    text-align: center;
    padding: 0;
    margin: 0;
}

header ul > li {
    font-family: arial;
    font-size: 16px;
    padding-right: 50px;
    display: inline-block;
}

@media screen and (min-height: 416px) {
    header ul > li {
        font-size: 26px;
        padding-right: 20px;
    }
}

@media screen and (min-height: 576px) {
    header ul > li {
        padding-right: 60px;
        font-size: 36px;
    }
}