@import url('https://fonts.cdnfonts.com/css/seven-segment');       
:root{
    --eins: rgb(174, 0, 255);
    --zwei: rgb(0, 255, 51);
}
body{
    background-size: 500% 200%;
    /*background-image: linear-gradient(
        -135deg, 
        red 0%,
        orange 20%,
        yellow 40%,
        green 60%,
        blue 80%,
        rgb(191, 0, 255) 100%
    );*/
    background-image: linear-gradient(-45deg, var(--eins) 0%, rgb(255, 0, 0) 50%, rgb(255, 131, 0) 100%);
    animation: AnimateBG 10s ease infinite;
    height: 98vh;
    margin: 0;
    font-family: 'Seven Segment', monospace;
    font-weight: bold;
    user-select: none;
}
@keyframes AnimateBG { 
    0%{background-position:0% 50%}
    50%{background-position:100% 50%}
    100%{background-position:0% 50%}
}
img{
    width: 100%;
    height: auto;
}
#openmenu,
#closemenu{
    width: 3rem;
    height: 3rem;
    position: fixed;
    bottom: 0;
    left: 0;
    margin-left: 0.5rem;
    margin-bottom: 0.5rem;
    background-color: #000000;
    padding: 1rem;
    border-radius: 50%;
    opacity: .5;
    z-index: 5;
}
#openmenu{
    display: block;
}
#closemenu{
    display: none;
}
#menu{
    display: none;
    position: absolute;
    background-color: #2a2a2ae0;
    border: solid 1px #000000;
    border-radius: 5px;
    width: 50%;
    height: 50%;
    margin: 25%;
    margin-top: 15rem;
    z-index: 4;
    text-align: center;
    color: #ffffff;
}
select{
    background-color: #262626;
    color: white;
    border: none;
    outline: none;
}
option{
    background-color: #262626;
    color: white;
}
input{
    accent-color: #303030;
}
#style{
    margin-top: 3rem;
}
#size{
    margin-top: 3rem;
}
#clock{
    font-size: 300px;
    height: 98vh;
    width: 98vw;
    /*display: none;*/
    display: flex;
    justify-content: center;
    align-items: center;
    position:absolute;
    z-index: 1;
}

@media (max-width: 600px) {
    #openmenu,
    #closemenu{
        width: 1.5rem;
        height: 1.5rem;
        padding: .7rem;
    }
    #menu{
        width: 90%;
        margin-left:1rem;
    }
}