* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html {
    font-family: sans-serif;
}
body {
    background-color: #aaa;
    color: #fff;
    overflow: hidden;
}
#controls {
    padding: 0.5rem;
    position: absolute;
    top: 0;
    width: 100%;
    background-color: #888;
    background-color: rgba(0, 0, 0, 0.35);
}
#controls h3 {
    display: inline-block
}
#slider-holder {
    float: right;
}
.tag {
    padding: 0 0.5rem
}
.hidden {
    display: none;
}
/* range input formatting
 * relies heavly on this:
 * https://codepen.io/thebabydino/pen/pvpJWX
 */
input[type=range] {
    -webkit-appearance: none;
    -moz-appearance: none;
    background-color: transparent;
    display: inline-block;
    margin: 0 auto;
    width: 11rem;
    height: 1rem;
    cursor: pointer;
}
/* thumb */
input[type='range']::-webkit-slider-thumb {
    -webkit-appearance: none;
    position: relative;
    margin: -0.25em;
    border: none;
    /* Firefox, IE */
    width: 1em;
    height: 1em;
    border-radius: 0.5em;
    background: #fff;
}
input[type='range']::-moz-range-thumb {
    border: none;
    /* Firefox, IE */
    width: 1em;
    height: 1em;
    border-radius: 0.5em;
    cursor: ew-resize;
    background: #fff;
}
input[type='range']::-ms-thumb {
    border: none;
    /* Firefox, IE */
    width: 1em;
    height: 1em;
    border-radius: 0.5em;
    background: #fff;
}
/* track */
input[type="range"]::-webkit-slider-runnable-track {
    -webkit-appearance: none;
    height: 0.5em;
    border-radius: 0.25em;
    background: #777;
}
input[type='range']::-moz-range-track {
    border: none;
    height: 0.5em;
    border-radius: 0.25em;
    background: #777;
}
input[type='range']::-ms-track {
    border: none;
    height: 0.5em;
    border-radius: 0.25em;
    background: #777;
    color: transparent;
}