body {
    position: absolute;
    top: 0;
    margin: 0;
    font-family: Arial;
    color: white;
    background: url("https://HIHIQY1.nl/bg.png");
}

body * {
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

a {
    color: rgb(100, 255, 100);;
}

#header {
    position: fixed;
    left: 0;
    top: 0;
    z-index: 1;
    width: 100%;
    height: 10vh;
    background-color: rgba(0, 0, 0, .75);
    box-shadow: 0px 0px 10px 5px rgba(255, 255, 255, .8);
}
#headeritems {
    position: absolute;
    height: 100%;
    overflow: hidden;
}
.headeritem {
    float: left;
    height: 100%;
    background-color: rgba(255, 255, 255, .25);
    padding: 1vw;
    box-sizing: border-box;
    transition-duration: .5s;
    cursor: pointer;
}
.headeritem:hover {
    background-color: rgba(255, 255, 255, .5);
}
.headeritem span {
    position: relative;
    top: 50%;
    display: block;
    transform: translateY(-50%);
    font-size: 1.5vw;
}

#title {
    margin: 0;
    margin-top: Calc(10vh + 2.5vh);
    font-size: 10vw;
    text-align: center;
    text-shadow: 0 0 10px white;
}

#textblocks {
    margin-top: 2.5vh;
    margin-left: 2.5%;
    width: 95%;
}

.tile {
    margin-bottom: Calc(15px + 1vw);
    width: 100%;
    background-color: rgba(255, 255, 255, .25);
    border-radius: 2.5vh;
    box-shadow: 0px 0px 10px 5px rgba(255, 255, 255, .8);
    overflow: hidden;
    padding: 2vw;
    box-sizing: border-box;
}
.tiletext, .tile p {
    margin: 0;
    text-align: center;
    font-size: 2vw;
}
.tiletitle {
    position: relative;
    left: 50%;
    transform: translateX(-50%);
    display: inline-block;
    font-size: 5vw;
    margin: 0;
    text-shadow: 0 0 5px white;
    text-align: center;
}

@media only screen and (orientation: portrait) {
    #header {
        display: none;
    }
    #textblocks {
        margin-left: 5%;
        width: 90%;
    }
    #title {
        margin-top: 0;
        font-size: 10vh;
    }
    .tile {
        margin-bottom: Calc(15px + 1vh);
        padding: 2vh;
    }
    .tiletext, .tile p {
        font-size: 2vh;
    }
    .tiletitle {
        font-size: 5vh;
    }
}