/* Jonathan Neal's system font stack
https://github.com/jonathantneal/system-font-css/blob/gh-pages/system-font.css */
@font-face {
	font-family: system-ui;
	font-style: normal;
	font-weight: 300;
	src: local(".SFNS-Light"), local(".SFNSText-Light"), local(".HelveticaNeueDeskInterface-Light"), local(".LucidaGrandeUI"), local("Segoe UI Light"), local("Ubuntu Light"), local("Roboto-Light"), local("DroidSans"), local("Tahoma"), sans-serif;
}

@font-face {
	font-family: system-ui;
	font-style: italic;
	font-weight: 300;
	src: local(".SFNS-LightItalic"), local(".SFNSText-LightItalic"), local(".HelveticaNeueDeskInterface-Italic"), local(".LucidaGrandeUI"), local("Segoe UI Light Italic"), local("Ubuntu Light Italic"), local("Roboto-LightItalic"), local("DroidSans"), local("Tahoma"), sans-serif;
}

@font-face {
	font-family: system-ui;
	font-style: normal;
	font-weight: 400;
	src: local(".SFNS-Regular"), local(".SFNSText-Regular"), local(".HelveticaNeueDeskInterface-Regular"), local(".LucidaGrandeUI"), local("Segoe UI"), local("Ubuntu"), local("Roboto-Regular"), local("DroidSans"), local("Tahoma"), sans-serif;
}

@font-face {
	font-family: system-ui;
	font-style: italic;
	font-weight: 400;
	src: local(".SFNS-Italic"), local(".SFNSText-Italic"), local(".HelveticaNeueDeskInterface-Italic"), local(".LucidaGrandeUI"), local("Segoe UI Italic"), local("Ubuntu Italic"), local("Roboto-Italic"), local("DroidSans"), local("Tahoma"), sans-serif;
}

@font-face {
	font-family: system-ui;
	font-style: normal;
	font-weight: 500;
	src: local(".SFNS-Medium"), local(".SFNSText-Medium"), local(".HelveticaNeueDeskInterface-MediumP4"), local(".LucidaGrandeUI"), local("Segoe UI Semibold"), local("Ubuntu Medium"), local("Roboto-Medium"), local("DroidSans-Bold"), local("Tahoma Bold"), sans-serif;
}

@font-face {
	font-family: system-ui;
	font-style: italic;
	font-weight: 500;
	src: local(".SFNS-MediumItalic"), local(".SFNSText-MediumItalic"), local(".HelveticaNeueDeskInterface-MediumItalicP4"), local(".LucidaGrandeUI"), local("Segoe UI Semibold Italic"), local("Ubuntu Medium Italic"), local("Roboto-MediumItalic"), local("DroidSans-Bold"), local("Tahoma Bold"), sans-serif;
}

@font-face {
	font-family: system-ui;
	font-style: normal;
	font-weight: 700;
	src: local(".SFNS-Bold"), local(".SFNSText-Bold"), local(".HelveticaNeueDeskInterface-Bold"), local(".LucidaGrandeUI"), local("Segoe UI Bold"), local("Ubuntu Bold"), local("Roboto-Bold"), local("DroidSans-Bold"), local("Tahoma Bold"), sans-serif;
}

@font-face {
	font-family: system-ui;
	font-style: italic;
	font-weight: 700;
	src: local(".SFNS-BoldItalic"), local(".SFNSText-BoldItalic"), local(".HelveticaNeueDeskInterface-BoldItalic"), local(".LucidaGrandeUI"), local("Segoe UI Bold Italic"), local("Ubuntu Bold Italic"), local("Roboto-BoldItalic"), local("DroidSans-Bold"), local("Tahoma Bold"), sans-serif;
}

@font-face {
	font-family: iosevka;
	font-style: normal;
	font-weight: 300;
	src: url("/font/iosevka/ss07-regular.woff2");
	font-display: swap;
}

@font-face {
	font-family: iosevka;
	font-style: italic;
	font-weight: 300;
	src: url("/font/iosevka/ss07-italic.woff2");
	font-display: swap;
}

@font-face {
	font-family: iosevka;
	font-style: italic;
	font-weight: 500;
	src: url("/font/iosevka/ss07-bold-italic.woff2");
	font-display: swap;
}

*,*::before,*::after {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}

:root, body.light-theme {
	--syntax-border: rgba(255, 255, 255, 0.2);
	--syntax-bg: rgba(0, 0, 0, 0.05);
	--syntax-left-edge: #ccc;
	--syntax-sh: #775;
	--syntax-name: #480;
	--syntax-mag: #d04;
	--syntax-lit: #40f;
	--syntax-lits: #660;
	--syntax-aq: #04d;
	--syntax-err: #960050;

	--ff: system-ui;
	--msff: iosevka;
	/* primary "brand" colors */
	--pc: #0af;
	--pcd: #0cf;
	--bg: #fff;
	--fg: #111;
	--heading-fg: #333;
	--bg-header: #eee;
	--icon-shadow: #4df;

	--input-bg: #eee;
	--input-hover-bg: #ddd;
	--input-focus-bg: var(--input-bg);

	--button-bg: #eee;
	--button-hover-bg: #ddd;
	--button-focus-bg: var(--input-bg);

	--link-fg: var(--pc);
	--link-visited-fg: var(--pcd);
}

.hide-in-light-theme {
	display: none;
}

@media (prefers-color-scheme: dark) {
	:root {
		--syntax-border: rgba(255, 255, 255, 0.2);
		--syntax-bg: rgba(255, 255, 255, 0.03);
		--syntax-left-edge: #333;
		--syntax-sh: #75715e;
		--syntax-name: #a6e22e;
		--syntax-mag: #f92672;
		--syntax-lit: #ae81ff;
		--syntax-lits: #e6db74;
		--syntax-aq: #66d9ef;
		--syntax-err: #960050;

		--ff: system-ui;
		--msff: iosevka;
		/* primary "brand" colors */
		/* --pc: #df3c59; /* original red */
		/* --pcd: #8e293b; /* darker version for gradients */
		--pc: #0af;
		--pcd: #0cf;
		--bg: #111;
		--fg: #fff;
		--heading-fg: #ccc;
		--bg-header: #191919;
		--icon-shadow: #000;

		--input-bg: #222;
		--input-hover-bg: #333;
		--input-focus-bg: var(--input-bg);

		--button-bg: #222;
		--button-hover-bg: #333;
		--button-focus-bg: var(--input-bg);
	}

	.hide-in-dark-theme {
		display: none;
	}

	.hide-in-light-theme {
		display: inherit;
	}

	body.light-theme .hide-in-dark-theme {
		display: inherit;
	}

	body.dark-theme .hide-in-light-theme {
		display: none;
	}
}

body.dark-theme {
	--syntax-border: rgba(255, 255, 255, 0.2);
	--syntax-bg: rgba(255, 255, 255, 0.03);
	--syntax-left-edge: #333;
	--syntax-sh: #75715e;
	--syntax-name: #a6e22e;
	--syntax-mag: #f92672;
	--syntax-lit: #ae81ff;
	--syntax-lits: #e6db74;
	--syntax-aq: #66d9ef;
	--syntax-err: #960050;

	--ff: system-ui;
	--msff: iosevka;
	/* primary "brand" colors */
	/* --pc: #df3c59; /* original red */
	/* --pcd: #8e293b; /* darker version for gradients */
	--pc: #0af;
	--pcd: #0cf;
	--bg: #111;
	--fg: #fff;
	--heading-fg: #ccc;
	--bg-header: #191919;
	--icon-shadow: #000;

	--input-bg: #222;
	--input-hover-bg: #333;
	--input-focus-bg: var(--input-bg);

	--button-bg: #222;
	--button-hover-bg: #333;
	--button-focus-bg: var(--input-bg);
}

body.dark-theme .hide-in-dark-theme {
	display: none;
}

body.dark-theme .hide-in-light-theme {
	display: inherit;
}

body.light-theme .hide-in-dark-theme {
	display: inherit;
}

body.light-theme .hide-in-light-theme {
	display: none;
}

input[type=image] {
	stroke: var(--button-fg);
	fill: var(--button-fg);
}

body > main {
	padding: 0.5em;
	line-height: 1.6em;
}

body > main > .highlight,
main > h1,
main > h2,
main > h3,
main > h4,
main > h5,
main > h6,
body > main > form,
body > main > ul,
body > main > ol,
body > main > p {
	margin-top: 1em;
	margin-bottom: 0.25em;
	max-width: 60ch;
}

body > main > .highlight {
	max-width: 100vw;
}

main > h1 + p,
main > h2 + p,
main > h3 + p,
main > h4 + p,
main > h5 + p,
main > h6 + p {
	margin-top: 0;
}

main > h1,
main > h2,
main > h3,
main > h4,
main > h5,
main > h6 {
	color: var(--heading-fg);
}

main > *:first-child {
	margin-top: 0;
}

main > p > code {
	padding: 0.1em 0.25em;
	border-radius: 0.25em;
	background-color: rgba(255, 255, 255, 0.03);
}

body {
	background-color: var(--bg);
	color: var(--fg);
	font-family: var(--ff);
	font-weight: 500;
	font-size: 1rem;
}

code, pre {
	font-family: var(--msff), monospace;
}

body > header {
	font-family: var(--msff), monospace;
	position: relative;
	display: flex;
	background-color: var(--bg-header);
	color: var(--fg);
	box-shadow: 0 0 0.5em rgba(0, 0, 0, 0.25);
	margin-bottom: 0.5em;
}

body > header > section {
	display: flex;
}

body > header > section > a {
	line-height: 1.5em;
	display: flex;
	justify-content: center;
	align-items: center;
	padding: 0.25em 0.5em;
	color: var(--fg);
}

body > header > section > a:visited {
	color: var(--fg);
}

body > header > section > a:hover {
	background: rgba(255, 255, 255, 0.1);
}

body > header > section > a > img,
body > header > section > a > img {
	max-width: 48px;
}

body > header > section > a {
	text-decoration: none;
}

body > header > section > a > h1 {
	font-weight: 300;
	font-size: 150%;
}

input, textarea {
	background: var(--input-bg);
	border: 0;
	font: inherit;
	padding: 0.5em 1em;
	color: var(--input-fg);
	border-radius: 0.25em;
}

input:hover, textarea:hover {
	background: var(--input-hover-bg);
}

input:focus, textarea:focus {
	background: var(--input-focus-bg);
}

button, input[type=submit] {
	font: inherit;
	background: var(--button-bg);
	color: var(--button-fg);
	cursor: pointer;
	border: 0;
	padding: 0.5em 1em;
}

button:hover, input[type=submit]:hover {
	background: var(--button-hover-bg);
}

button:focus, input[type=submit]:focus {
	background: var(--button-hover-bg);
}

ul, ol {
	padding-left: 2em;
}

a {
	text-decoration-skip-ink: auto;
	color: var(--link-fg);
}

a:visited {
	color: var(--link-visited-fg);
}

.lead {
	font-size: 1.5rem;
}

.rounded {
	border-radius: 0.5em;
}

form > label,
form > fieldset {
	border: 0;
	display: flex;
	flex-direction: column;
}

form > fieldset ~ label,
form > label ~ fieldset,
form > label ~ label,
form > fieldset ~ fieldset {
	margin-top: 0.5em;
}

img, embed, frame, iframe {
	max-width: 100vw;
}

@media (max-width: 600px) {
	body > header {
		flex-direction: column;
		font-size: 125%;
	}
}

main > .highlight pre.chroma {
	border: 0;
	padding: 0.25em 0.5em;
	border-left: solid 0.25em var(--syntax-left-edge);
	overflow-x: auto;
	background-color: var(--syntax-bg);
}

.js-only {
	display: none;
}

.no-bg {
	background: none;
}

.hidden-in-browsers {
	display: none;
}

.centerize {
	display: flex;
	justify-content: center;
	align-items: center;
	align-content: conter;
}

#icon-shadow {
	stroke:var(--icon-shadow);
}

@media (max-width: 600px) {
	.hidden-on-mobile { display: none; }
}

@media (min-width: 600px) {
	body.align-left .hide-in-align-left {
		display: none;
	}

	body.align-center .hide-in-align-center {
		display: none;
	}

	body.align-center > main {
		max-width: 60ch;
		margin: 0 auto;
	}

	body.align-center > main img,
	body.align-center > main embed,
	body.align-center > main frame,
	body.align-center > main iframe {
		max-width: 100%;
		margin: 0 auto;
		display: block
	}
}

/* syntax highlighting */
/* TabSize */ .chroma { -moz-tab-size: 2; tab-size: 2 }
/* Background */ .chroma { color: var(--fg); border: solid 0.05em var(--syntax-border) }
/* Error */ .chroma .err { color: var(--syntax-err); background-color: var(--syntax-bg) }
/* LineTableTD */ .chroma .lntd { vertical-align: top; padding: 0; margin: 0; border: 0; }
/* LineTable */ .chroma .lntable { border-spacing: 0; padding: 0; margin: 0; border: 0; width: auto; overflow: auto; display: block; }
/* LineHighlight */ .chroma .hl { display: block; width: 100%; background-color: var(--syntax-lhl) }
/* LineNumbersTable */ .chroma .lnt { margin-right: 0.4em; padding: 0 0.4em 0 0.4em; }
/* LineNumbers */ .chroma .ln { margin-right: 0.4em; padding: 0 0.4em 0 0.4em; }
/* Keyword */ .chroma .k { color: var(--syntax-aq) }
/* KeywordConstant */ .chroma .kc { color: var(--syntax-aq) }
/* KeywordDeclaration */ .chroma .kd { color: var(--syntax-aq) }
/* KeywordNamespace */ .chroma .kn { color: var(--syntax-mag) }
/* KeywordPseudo */ .chroma .kp { color: var(--syntax-aq) }
/* KeywordReserved */ .chroma .kr { color: var(--syntax-aq) }
/* KeywordType */ .chroma .kt { color: var(--syntax-aq) }
/* NameAttribute */ .chroma .na { color: var(--syntax-name) }
/* NameClass */ .chroma .nc { color: var(--syntax-name) }
/* NameConstant */ .chroma .no { color: var(--syntax-aq) }
/* NameDecorator */ .chroma .nd { color: var(--syntax-name) }
/* NameException */ .chroma .ne { color: var(--syntax-name) }
/* NameFunction */ .chroma .nf { color: var(--syntax-name) }
/* NameOther */ .chroma .nx { color: var(--syntax-name) }
/* NameTag */ .chroma .nt { color: var(--syntax-mag) }
/* Literal */ .chroma .l { color: var(--syntax-lit) }
/* LiteralDate */ .chroma .ld { color: var(--syntax-lits) }
/* LiteralString */ .chroma .s { color: var(--syntax-lits) }
/* LiteralStringAffix */ .chroma .sa { color: var(--syntax-lits) }
/* LiteralStringBacktick */ .chroma .sb { color: var(--syntax-lits) }
/* LiteralStringChar */ .chroma .sc { color: var(--syntax-lits) }
/* LiteralStringDelimiter */ .chroma .dl { color: var(--syntax-lits) }
/* LiteralStringDoc */ .chroma .sd { color: var(--syntax-lits) }
/* LiteralStringDouble */ .chroma .s2 { color: var(--syntax-lits) }
/* LiteralStringEscape */ .chroma .se { color: var(--syntax-lit) }
/* LiteralStringHeredoc */ .chroma .sh { color: var(--syntax-lits) }
/* LiteralStringInterpol */ .chroma .si { color: var(--syntax-lits) }
/* LiteralStringOther */ .chroma .sx { color: var(--syntax-lits) }
/* LiteralStringRegex */ .chroma .sr { color: var(--syntax-lits) }
/* LiteralStringSingle */ .chroma .s1 { color: var(--syntax-lits) }
/* LiteralStringSymbol */ .chroma .ss { color: var(--syntax-lits) }
/* LiteralNumber */ .chroma .m { color: var(--syntax-lit) }
/* LiteralNumberBin */ .chroma .mb { color: var(--syntax-lit) }
/* LiteralNumberFloat */ .chroma .mf { color: var(--syntax-lit) }
/* LiteralNumberHex */ .chroma .mh { color: var(--syntax-lit) }
/* LiteralNumberInteger */ .chroma .mi { color: var(--syntax-lit) }
/* LiteralNumberIntegerLong */ .chroma .il { color: var(--syntax-lit) }
/* LiteralNumberOct */ .chroma .mo { color: var(--syntax-lit) }
/* Operator */ .chroma .o { color: var(--syntax-mag) }
/* OperatorWord */ .chroma .ow { color: var(--syntax-mag) }
/* Comment */ .chroma .c { color: var(--syntax-sh) }
/* CommentHashbang */ .chroma .ch { color: var(--syntax-sh) }
/* CommentMultiline */ .chroma .cm { color: var(--syntax-sh) }
/* CommentSingle */ .chroma .c1 { color: var(--syntax-sh) }
/* CommentSpecial */ .chroma .cs { color: var(--syntax-sh) }
/* CommentPreproc */ .chroma .cp { color: var(--syntax-sh) }
/* CommentPreprocFile */ .chroma .cpf { color: var(--syntax-sh) }
/* GenericDeleted */ .chroma .gd { color: var(--syntax-mag) }
/* GenericEmph */ .chroma .ge { font-style: italic }
/* GenericInserted */ .chroma .gi { color: var(--syntax-name) }
/* GenericStrong */ .chroma .gs { font-weight: bold }
/* GenericSubheading */ .chroma .gu { color: var(--syntax-sh) }