boid.css

@import url('https://fonts.googleapis.com/css?family=Open+Sans:400,700&display=swap');
* {
    margin: 0;
    padding: 0;
    user-select: none;
    box-sizing: border-box;
}

html {
    /* width: 100%; */
    /* height: 100vh; */
    font-size: 16px;
    font-family: "Open Sans", Helvetica, Arial, sans-serif;
    color: #eee;
    margin-bottom: 40px;
    overflow: hidden;
}


/* #container :last-child {
	margin-bottom: 30px;
} */


/* webkit scrollbar */

::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #0004;
}

::-webkit-scrollbar-thumb {
    background: #fff4;
}

::-webkit-scrollbar-thumb:hover {
    background: #fff3;
}

.hidden {
    transition: transform 0.5s;
    transform: translateX(100%);
}

h3 {
    font-size: 1.6em;
    margin-bottom: 12px;
    margin-top: 20px;
}

h4 {
    font-size: 1.3em;
    margin-bottom: 0;
    margin-top: 10px;
}

h5 {
    font-size: 1.1em;
    margin-bottom: 5px;
    margin-top: 10px;
}

canvas {
    display: block;
    margin: 0 auto;
    position: absolute;
    top: 0px;
    left: 0px;
    z-index: -1;
}

p {
    display: block;
    margin: 10px auto 0 auto !important;
}

select {
    display: block;
    padding: 5px 0;
}


/* slider css */

input[type="range"] {
    -webkit-appearance: none;
    width: 50%;
    height: 8px;
    background: #0008;
    outline: none;
    transition: background 0.2s;
}

input[type="range"]:hover {
    background: #fff2;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    background: #fff8;
    border: 0;
    border-radius: 0;
    transition: background 0.2s;
}

input[type="range"]::-webkit-slider-thumb:hover {
    background: #fffb;
}

input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: #fff8;
    transition: background 0.2s;
    border: 0;
    border-radius: 0;
}

input[type="range"]::-moz-range-thumb:hover {
    background: #fffb;
}


/* checkbox css */

input[type="checkbox"] {
    opacity: 0;
}

label::before {
    content: "";
    display: inline-block;
    height: 16px;
    width: 16px;
    background: #0008;
    transition: background 0.2s;
    position: absolute;
    top: 3px;
    left: -20px;
}

input[type="checkbox"]:hover+label::before {
    background: #fff2;
}

label::after {
    content: "";
    display: inline-block;
    height: 3px;
    width: 9px;
    border-left: 2px solid;
    border-bottom: 2px solid;
    border-color: #fff8;
    transform: rotate(-45deg);
    transition: opacity 0.1s, border-color 0.2s;
    opacity: 0;
    position: absolute;
    left: -17px;
    top: 7px;
}

input[type="checkbox"]:checked+label::after {
    opacity: 1;
}

input[type="checkbox"]:hover+label::after {
    border-color: #fffb;
}

label {
    position: relative;
}


/* pause button */

div .pauser {
    display: grid;
    align-items: center;
    justify-items: center;
    grid-column: 2 / span 1;
    grid-row: 3 / span 1;
    pointer-events: all;
}

.pauser input[type="checkbox"] {
    height: 36px;
    /* display: inline-block; */
}

.pauser label {
    align-items: center;
    justify-items: center;
}

.pauser label::before {
    /* height: 36px;
	width: 36px;

	top: -12px;
	left: -13px; */
    content: none;
}

.pauser label::after {
    height: 24px;
    width: 20px;
    border-right: 6px solid;
    border-left: 6px solid;
    border-bottom: none;
    border-top: none;
    border-color: #fff8;
    left: -5px;
    top: -6px;
    transform: rotate(0);
    transition: all 0.1s, border-color 0.2s;
    opacity: 1;
    box-sizing: border-box;
}

.pauser input[type="checkbox"]:checked+label::after {
    height: 24px;
    width: 8px;
    border-right: 0px solid transparent;
    border-left: 16px solid #fff8;
    border-bottom: 12px solid transparent;
    border-top: 12px solid transparent;
    left: -2px;
}


/* button css */

button {
    display: block;
    margin-top: 10px;
    padding: 10px;
    font-size: 16px;
    font-family: "Open Sans", Helvetica, Arial, sans-serif;
    color: #eee;
    border: 2px solid #0008;
    border-radius: 0;
    background: #0008;
    transition: background 0.1s;
}

button:hover {
    background: #fff2;
}

button:active {
    background: #fff4;
}

button.copied {
    border: 2px solid #0ff4;
}

.resetters * {
    float: left;
    margin-right: 10px;
}

.resetters::after {
    content: "";
    clear: both;
    display: table;
}


/* nexter */

.nexter {
    position: relative;
    right: 0;
    float: right;
    top: -4px;
    display: none;
}

input[type="checkbox"]:checked+label+.nexter {
    display: block;
}