style.css

@import url("https://fonts.googleapis.com/css2?family=Lexend+Deca&family=Open+Sans:wght@300;400;600&display=swap");

:root {
	/* --base: #ff7675; */
	--base: #2f86c9;
	--title-font: "Lexend Deca", Helvetica, sans-serif;
	--text-font: "Open Sans", Helvetica, sans-serif;
}

* {
	margin: 0;
	padding: 0;
	user-select: none;
	box-sizing: border-box;
}

*::before,
*::after {
	box-sizing: border-box;
}

html {
	width: 100%;

	font-size: 16px;
	font-family: var(--text-font);
	color: #eee;

	margin-bottom: 40px;

	overflow: hidden;
}

body {
	width: 100%;
	height: 100vh;
	overflow: hidden;
	background: #161616;
}

#container {
	background-color: #0006;
	width: calc(min(100%, 500px) - 40px);
	height: calc(100vh - 60px);
	padding: 20px 30px 50px 30px;
	overflow: auto;
	position: absolute;
	top: 30px;
	right: 0;
	border-radius: 20px 0 0 20px;

	/* firefox/experimental scrollbar */
	scrollbar-color: #fff4 #0004;
	scrollbar-width: thin;
	transition: transform 0.5s;
}

#container.hidden {
	transform: translateX(100%);
}

#toggler {
	position: absolute;
	top: calc(50vh - 10px);
	right: calc(min(100%, 500px) - 35px);
	height: 25px;
	width: auto;
	transform: rotate(0);
	transition: transform 0.5s, right 0.5s;
	cursor: pointer;
}

#toggler.hidden {
	transform: rotate(180deg);
	right: 5px;
}

#toggler .img {
	filter: invert();
	opacity: 0.8;
	transition: filter 0.2s, opacity 0.2s;
}
#toggler:hover .img {
	filter: invert() drop-shadow(-10px 0 0 var(--base)) drop-shadow(0 0 5px #fff8);
	opacity: 1;
}

#toggler img {
	height: 25px;
	width: auto;
	transition: transform 0.2s, opacity 0.2s;
}
#toggler:hover img {
	transform: translateX(5px);
}
#toggler img.gone {
	opacity: 0;
}
#toggler:hover img.gone {
	opacity: 1;
}

/* webkit scrollbar */
::-webkit-scrollbar {
	width: 10px;
}
::-webkit-scrollbar-track {
	background: #0004;
}
::-webkit-scrollbar-thumb {
	background: #fff4;
}
::-webkit-scrollbar-thumb:hover {
	background: #fff3;
}

h3,
h4,
h5 {
	font-family: var(--title-font);
	letter-spacing: 2px;
	filter: drop-shadow(0 0 5px #fff6);
}

h3 {
	font-size: 1.6em;
	margin-bottom: 12px;
	margin-top: 20px;
}
h4 {
	font-size: 1.3em;
	margin-bottom: 5px;
	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;
	background: #161616;
}

p {
	display: block;
	margin-top: 10px;
}

p.info {
	font-size: 0.9em;
}

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

/* header */

header * {
	overflow: auto;
	display: inline-block;
}

.source {
	color: var(--base);
	text-decoration: none;
	border-bottom: 1px solid var(--base);
	transition: 0.2s border, 0.2s color;
	margin-bottom: 12px;
	margin-left: 4px;
}

.source:hover {
	color: #eeef;
	border-bottom: 2px solid transparent;
	filter: drop-shadow(0 0 5px #fff8);
}

/* slider css */

input[type="range"] {
	-webkit-appearance: none;
	width: 100%;
	height: 8px;
	background: #0008;
	outline: none;
	transition: background 0.2s;
}

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

input[type="range"]::-webkit-slider-thumb {
	appearance: none;
	width: 16px;
	height: 16px;
	background: var(--base);
	opacity: 0.8;
	transition: opacity 0.2s, filter 0.2s;
	border: 0;
	border-radius: 2px;
	cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb:hover {
	opacity: 1;
	filter: drop-shadow(0 0 5px #fff8);
}

input[type="range"]::-moz-range-thumb {
	width: 16px;
	height: 16px;
	background: var(--base);
	opacity: 0.8;
	transition: opacity 0.2s, filter 0.2s;
	border: 0;
	border-radius: 2px;
	cursor: pointer;
}
input[type="range"]::-moz-range-thumb:hover {
	opacity: 1;
	filter: drop-shadow(0 0 5px #fff8);
}

/* checkbox css */

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

label::before {
	content: "";
	display: inline-block;

	height: 16px;
	width: 16px;

	background: #0008;
	transition: background 0.2s, filter 0.2s;

	position: absolute;
	top: 3px;
	left: -20px;
	border-radius: 2px;
	cursor: pointer;
}
input[type="checkbox"]:hover + label::before {
	background: #fff2;
	filter: drop-shadow(0 0 5px #fff8);
}

label::after {
	content: "";
	display: inline-block;
	height: 5px;
	width: 11px;
	border-left: 2px solid;
	border-bottom: 2px solid;
	border-color: var(--base);

	transform: rotate(-45deg);
	transition: opacity 0.1s, border-color 0.2s;
	opacity: 0;

	position: absolute;
	left: -17px;
	top: 8px;
	cursor: pointer;
}
input[type="checkbox"]:checked + label::after {
	opacity: 0.8;
}
input[type="checkbox"]:checked:hover + label::after {
	opacity: 1;
}

label {
	position: relative;
}

/* pause button */

#pauser {
	display: flex;
	justify-content: space-between;
	width: 100%;
	height: 40px;
	margin-top: 10px;
}

#pauser input[type="checkbox"] {
	height: 36px;
	display: none;
}

#pauser label::before {
	height: 36px;
	width: 36px;

	top: 2px;
	left: 0;
	border: 2px solid #0008;
}

#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: 8px;
	top: 8px;

	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: 11px;
}

/* nexter */

.nexter {
	margin-top: 0;
	display: none;
}

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

/* button css */

button {
	font-family: var(--title-font);
	display: inline-block;
	padding: 5px 10px;
	border-radius: 10px;
	border: 2px solid var(--base);
	text-decoration: none;
	user-select: none;

	background-color: #0008;
	color: var(--base);

	margin-top: 10px;
	margin-bottom: 5px;
	box-shadow: 0 4px 0 var(--base);
	cursor: pointer;
	transition: background 0.2s, color 0.2s, filter 0.2s, transform 0.1s,
		box-shadow 0.1s;
}

button:hover {
	background: var(--base);
	color: #eee;
	filter: drop-shadow(0 0 5px #fff4);
}

button:active {
	transform: translateY(3px);
	box-shadow: 0 1px 0 var(--base);
}

.resetters {
	display: flex;
	gap: 12px;
}

.resetters * {
	flex: 1;
}

/* tooltip */

.tooltip {
	border-bottom: 1px dotted #fff8;
	opacity: 0.8;
	position: relative;
	display: block;
	width: 10px;
	text-align: center;
	margin-left: 10px;
	cursor: help;
	float: right;
}

.tooltip .tip {
	opacity: 0;
	visibility: hidden;
	position: absolute;
	bottom: 0;
	right: 15px;
	width: 200px;
	font-size: 0.8em;
	background-color: #000b;
	padding: 10px;
	border-radius: 10px;
	text-align: left;
	transition: opacity 0.2s, visibility 0.2s;
	cursor: default;
}

.tooltip:hover .tip {
	opacity: 1;
	visibility: visible;
}

/* debug menu */

#debug ~ #debug-opts {
	opacity: 0;
	display: none;
	transition: display 0.2s, opacity 0.2s;
}

#debug:checked ~ #debug-opts {
	opacity: 1;
	display: block;
}

/* popups */

.popupwindow {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100vh;
	background: #0004;
	display: grid;
	place-items: center;
	z-index: 2;
	visibility: hidden;
	opacity: 0;
	transition: opacity 0.2s, visibility 0.2s;
}

.popup {
	display: none;
	background: #0008;
	padding: 40px;
	border-radius: 20px;
}

.popup textarea {
	display: block;
	background: #0008;
	color: #eee;
	outline: none;
	border: 1px solid transparent;
	transition: border 0.2s;
	resize: none;
	padding: 10px;
	border-radius: 10px;
	width: 100%;
}

.popup textarea:focus {
	outline: none;
	border: 1px solid var(--base);
}

.visible {
	visibility: visible;
	opacity: 1;
}

.popup.visible {
	display: block;
}

.close {
	float: right;
	--base: #d63031;
}

/* queries */

@media (prefers-reduced-motion: reduce) {
	*,
	*::before,
	*::after {
		animation-delay: -1ms !important;
		animation-duration: 1ms !important;
		animation-iteration-count: 1 !important;
		background-attachment: initial !important;
		scroll-behavior: auto !important;
		transition-duration: 0s !important;
		transition-delay: 0s !important;
	}
}