index.css

body {
    background: black;
    color: white;
    font-family: sans-serif;
    text-align: center;
    margin: 0;
}

a {
    color: white;
}

.hidden {
    display: none;
}
.hidden.fsafari {
    position: absolute;
    width: 0;
    height: 0;
    overflow: hidden;
    display: initial;
}

.gray {
    opacity: 0.5;
}

.bold {
    font-weight: bold;
}

.flexbox {
    display: flex;
    flex-wrap: wrap;
}

.flexbox > * {
    flex: 1;
}

embed {
    width: 70vh;
    min-width: 300px;
    max-width: 100%;
    display: block;
    margin: auto;
}

input {
    display: none;
}

input#z + label {background-image: url(img/NoSmoking.png), url(img/Shiny.png);}
input#z:checked + label {background-image: url(img/Shiny.png);}
input#b + label {background-image: url(img/Bronze.png);}
input#s + label {background-image: url(img/Silver.png);}
input#g + label {background-image: url(img/Gold.png);}
input#d + label {background-image: url(img/Diamond.png);}
input + label {
    width: 30px;
    height: 30px;
    background-color: black;
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    display: inline-block;
    border: 1px solid maroon;
    border-radius: 6px;
    cursor: pointer;
}
input:checked + label {
    border-color: lime;
    background-color: white;
}

img {
    height: 30px;
    vertical-align: -8px;
}

#sgmnow {
    position: absolute;
    right: 0;
}
#sgmnow img {
    height: 40px;
    margin: 5px;
}