html {
	background: #2f3032;
	background: -webkit-radial-gradient(top, #383A56, #303133);
	background: -moz-radial-gradient(top, #383A56, #303133);
	background: radial-gradient(to bottom, #383A56, #303133);
}

body {
	background: #2f3032;
	min-height: calc(100vh - 64px);
	
    font-size: 16px;
    font-family: "Helvetica", sans-serif;
    line-height: 1.75rem;
	width: 960px;
	margin: auto;
    overflow-x: auto;
    overflow-y: auto;
	color: white;
	margin-top: 32px;
	margin-bottom: 32px;
	border-radius: 8px;
	border: 2px solid #383A56;
	padding: 32px;
}

header {
	border-bottom: 2px solid #383A56;
    padding-top: 1rem;
    padding-bottom: 1rem;
    font-size: 20px;
    text-align: center;
	border-radius: 0px 0px 3px 3px;
}

header > h1 {
    margin: 0rem;
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
}

main {
    display: flex;
    flex-direction: row;
    margin-bottom: 1rem;
    overflow-y: hidden;
}

section {
    min-width: 74%;
    width: 74%;
    overflow-y: hidden;
}

/*
    Navigation bar
*/
nav {
    padding-top: 1rem;
    position: sticky;
    width: 20%;
    min-width: 20%;
    max-width: 20%;
    margin-right: 5%;
    display: flex;
    flex-direction: column;
    text-align: left;
    font-size: 1rem;
    user-select: none;
	max-height: calc(100vh - 64px);
}

.outer-tree {
    width: 100%;
    list-style: none;
    padding: 0;
    margin: 0;
}

.outer-tree > li {
	margin-bottom: 0.25rem;
}

.outer-tree > li > span {
    display: block;
    width: 100%;
	padding: 0.25rem;
}

.outer-tree > li > span > i {
    transform: rotate(0deg);
    transition: 100ms ease-in-out transform;
}

.outer-tree li > span > span {
    padding-left: 1rem;;
}

.inner-tree {
	margin-left: 0.5rem;
    padding-left: 1rem;
    list-style: none;
	border-left: 1px solid white;
}

.inner-tree > li {
}

.inner-tree > li > label {
    color: white;
    font-weight: bold;
    text-align: center;
	text-decoration: underline;
}

.inner-tree > li > a {
    margin-left: 0.5rem;
}

nav a {
	color: white;
	text-decoration: none;
    display: inline-block;
    min-width: 196px;
}

nav a:hover {
	opacity: 0.8;
    cursor: pointer;
}

.nav-selected {
    font-weight: bold;
	color: #ede68a;
}

.spin-loader {
    border: 5px solid #f3f3f3;
    border-top: 5px solid #555;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 2s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

article > p {
    padding-left: 2rem;
    padding-right: 2rem;
}

/*
    Helpful widgets
*/
.vec2_input_group {
    position: relative;
    margin-top: 1rem;
    display: flex;
    flex-direction: row;
    width: 100%;
    justify-content: space-evenly;
    padding: 0.25rem;
}

.vec2_input_group > label {
    position: absolute;
    top: -1rem;
    left: 0rem;
    font-size: 0.8rem;
    font-weight: bold;
    text-align: left;
}

.vec2_input_group > input {
    width: 45%;
}

.slider_container {
    display: flex;
    flex-direction: column;
}

.slider_container > label {
    font-weight: 500;
}

/*
    WebGL container styling from here on.
*/
article .opengl_canvas_container {
    position: relative;
    width: 100%;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    border-radius: 3px;
}

article .opengl_canvas_container .play_button {
    all: unset;
    font-size: 2rem;
    width: 128px;
    height: 128px;
    position: absolute;
    top: calc(50% - 56px);
    left: calc(50% - 56px);
    border: 1px solid white;
    color: white;
    background-color: transparent;
    border-radius: 50%;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
}

.opengl_canvas_container canvas {
    border-radius: 3px 3px 0px 0px;
    border: 1px solid #b0a565;
}

article .opengl_canvas_container .play_button:hover {
    cursor: pointer;
}

article .opengl_canvas_container .stop_button {
    all: unset;
    font-size: 1rem;
    background-color: red;
    color: white;
    position: absolute;
    width: 128px;
    height: 2rem;
    border-radius: 2px;
    top: 0.5rem;
    left: 496px;
    display: none;
}

article .opengl_canvas_container .stop_button:hover {
    cursor: pointer;
}

article pre {
    width: 90%;
    overflow-x: auto;
    padding-left: 2rem;
    font-size: 0.9rem;
}

.opengl_canvas_sidebar {
    border: 1px solid #b0a565;
	border-radius: 0px 0px 3px 3px;
	display: grid;
	grid-template-columns: repeat(3, 1fr);
}

.opengl_canvas_sidebar .opengl_value_tracker {
	grid-column: 1 span /4;
    font-size: 14px;
	display: grid;
	grid-template-columns: repeat(3, 1fr);
}

.opengl_canvas_sidebar .opengl_value_tracker > li {
    padding-bottom: 0.5rem;
}

.opengl_canvas_sidebar .opengl_value_tracker > li > b {
    display: inline-block;
    width: 128px;
}

.opengl_canvas_sidebar .opengl_value_tracker > li > span {
    display: inline-block;
}

#references a,
#references a:visited {
    color: #EDE68A;
    opacity: 0.8;
}

#references a:hover {
    opacity: 1.0;
}

/*
    Code styles
*/
.code_keyword {
    color: blue;
    font-weight: bold;
}

.code_constant {
    font-weight: bold;
}

.code_str {
    color: orange;
}

.code_comment {
    color: green;
}