style.css

@media screen and (min-width: 100em) {
	header {
		padding: 0 4em;
	}
}

:root {
	-webkit-tap-highlight-color: #ffffff80;
	--background-color: #000000;
	--border-color: #404040;
	--grey-background-color: #202020;
	--grey-text-color: #505050;
	--orange: #ab3d00;
	--orange-text-color: #ffbb94;
	--pink: #a92471;
	--pink-text-color: #ff92d4;
	--text-color: #e2e2e2;
	background-color: var(--background-color);
	color: var(--text-color);
	font-family: "Quicksand", sans-serif;
	font-optical-sizing: auto;
	font-style: normal;
	font-weight: 400;
}

body {
	display: flex;
	flex-direction: column;
	margin: 0;
	min-height: 100vh;
	min-width: 24em;
}

header {
	background: linear-gradient(0deg, var(--border-color), var(--background-color) 0.2em);
	min-height: 4.2em;

	& > .menu {
		cursor: pointer;
		font-size: 2em;
		line-height: 2em;
		margin-left: auto;
		min-width: 2em;
		text-align: center;

		&::before {
			content: '☰';
		}

		&:hover {
			background-color: var(--pink);
		}
	}
}

h1 {
	display: inline-block;
	float: left;
	font-size: 1em;
	margin: 0.7em 1em 0 0.2em;
	min-width: 18em;
	position: relative;

	svg.logo {
		display: inline-block;
		height: 3em;
		margin: -0.2em 0.2em 0 0;
		min-width: 3em;

		path {
			fill: var(--grey-text-color);
			stroke: none;
			transition: fill 1s;
		}
	}

	a {
		display: inline-block;
		text-decoration: none;
	}

	a:hover svg.logo path {
		fill: var(--text-color);
	}

	span {
		color: var(--grey-text-color);
		font-family: "Signika", sans-serif;
		font-size: 2.1em;
		font-weight: normal;
		vertical-align: top;

		&.quadrimus {
			background: linear-gradient(90deg, var(--pink) 0%, var(--pink) 20%, var(--orange) 80%, var(--orange) 100%);
			background-clip: text;
			color: transparent;
			font-weight: bold;
		}
	}
}

nav {
	display: flex;
	flex-grow: 1;

	a {
		color: var(--text-color);
		display: flex;
		font-size: 1.4em;
		gap: 0.2em;
		line-height: 3em;
		padding: 0 1em;
		text-decoration: none;

		&.right:last-child {
			margin-left: auto;
		}

		&.external::after {
			background-image: url('data:image/svg+xml;base64,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');
			background-position: center;
			background-repeat: no-repeat;
			content: '';
			display: inline-block;
			opacity: 25%;
			width: 1em;
		}

		&:hover {
			background-color: var(--pink);
			color: var(--text-color);
		}

		&:nth-child(even):hover {
			background-color: var(--orange);
		}

		&.active {
			color: var(--text-color);
			font-weight: bold;
			position: relative;
		}

		&.active::before {
			bottom: 0;
			content: '▼';
			display: block;
			left: calc(50% - 0.5em);
			line-height: 100%;
			opacity: 25%;
			position: absolute;
			text-align: center;
			width: 1em;
		}
	}
}

@media screen and (max-width: 64em) {
	header {
		.menu {
			background-color: var(--background-color);
			display: inline-block !important;
			float: right;
			position: relative;
			z-index: 2;
		}
	}

	h1 {
		margin-right: 0;
		max-width: calc(100vw - 8em);
		min-width: unset;
		white-space: nowrap;
	}

	nav {
		display: none;

		&.opened {
			clear: both;
			display: flex;
			flex-direction: column;
			flex-grow: 1;
		}

		a {
			justify-content: center;
			padding: 0;
			width: 100%;

			&:last-child {
				margin-left: 0;
			}
		}
	}

	section {
		&.blocks {
			flex-direction: column;
		}

		&.conversion {
			flex-direction: column;

			figure {
				&:first-child {
					margin-bottom: 0;
				}

				&:last-child {
					margin-top: 0;
				}
			}

			div {
				flex-direction: row-reverse !important;
				margin-bottom: 0 !important;

				&::before {
					content: '⇧' !important;
				}

				&::after {
					content: '⇩' !important;
				}
			}
		}

		&.text {
			margin-inline: 0.8em !important;

			& > h2 {
				margin-block: 0.4em;
			}
		}
	}
}

@media screen and (max-width: 32em) {
	h1 {
		margin-top: 0.5em;
		position: relative;

		svg.logo {
			margin-top: 0;
		}

		& > span:last-child {
			left: 2.45em;
			position: absolute;
			top: 0.95em;
		}

		span {
			font-size: 1.4em !important;
		}
	}

	body.ig {
		h1 span {
			font-size: 19px !important;

			&:last-child {
				left: 56px;
				top: 22px;
			}
		}
	}
}

main {
	align-self: center;
	flex-grow: 1;
	max-width: 70em;
	position: relative;
	padding: 0 0.2em 2em 0.2em;
	width: 70em;
}

@media screen and (max-width: 71em) {
	main {
		align-self: stretch;
		max-width: none;
		width: auto;
	}
}

h2 {
	color: var(--pink);
	font-family: "Signika", sans-serif;
	font-size: 2em;
	text-align: center;
}

h3 {
	color: var(--orange);
	font-family: "Signika", sans-serif;
	font-size: 1.5em;
}

p {
	text-align: justify;
}

a {
	color: var(--text-color);

	&:hover {
		color: var(--pink-text-color);
	}

	&:active {
		color: var(--orange-text-color);
	}
}

ul {
	list-style-type: disc;
	padding-left: 1.5em;

	&.list-ellipsis {
		list-style-type: '… ';
	}

	&.list-tilda {
		list-style-type: '~ ';
	}
}

code {
	background-color: var(--grey-background-color);
	border-radius: 0.4em;
	color: var(--text-color);
	display: inline-block;
	font-family: monospace;
	font-size: 1.4em;
	line-height: 1.7em;
	padding: 0 0.2em;
	white-space: pre-line;

	& > b {
		color: var(--pink-text-color);
	}

	& > i {
		color: var(--orange-text-color);
		font-style: normal;
	}
}

figure > code {
	border: 0.1em solid var(--orange);
	display: block;
	padding: 0.8em;

	&:has(+ figcaption) {
		border-bottom-left-radius: 0;
		border-bottom-right-radius: 0;
	}

	& + figcaption {
		align-items: flex-start;
		background-color: var(--background-color);
		border: 0.1em solid var(--orange);
		border-top: none;
		border-radius: 0 0 0.4em 0.4em;
		color: var(--text-color);
		display: flex;
		overflow: hidden;

		& > span {
			display: inline-block;
			padding: 0.4em;
		}

		& > a {
			color: var(--text-color);
			border: 0.1em solid var(--orange);
			border-right: none;
			border-top: none;
			display: inline-block;
			margin: 0 0 -0.1em auto;
			padding: 0.4em;
			text-align: center;
			text-decoration: none;
			width: 4em;

			&:hover {
				background-color: var(--orange);
				color: var(--text-color);
			}
		}
	}
}

section.blocks {
	display: flex;
	gap: 1em;

	& > div {
		background-color: var(--grey-background-color);
		border-radius: 1em;
		display: flex;
		flex: 1;
		flex-direction: column;
		padding: 1em;

		& > h3 {
			color: var(--pink);
			margin: 0;
			text-align: center;
		}

		&:nth-child(even) > h3 {
			color: var(--orange);
		}

		& > figure {
			align-items: center;
			display: flex;
			margin: auto 0 0 0;
			min-height: var(--figure-height, auto);
			justify-content: center;
		}
	}

	&.download > div {
		& > a {
			background-color: var(--background-color);
			background-image: url('data:image/svg+xml;base64,PHN2ZyB2aWV3Qm94PSIwIDAgNSAxMCIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIj48cGF0aCBzdHlsZT0iZmlsbDogI2UyZTJlMjsgc3Ryb2tlOiBub25lOyIgZD0ibSAwLDEuMjUgaCAxLjc1IHYgMy40OTk5OTk5IGwgMS43NDk5OTk5LC0wLjAyMzI2NCAtMy40OTk5OTk5LDMuNTIzMjYzOCB6IiAvPjwvc3ZnPg');
			background-repeat: no-repeat;
			color: var(--text-color);
			display: flex;
			font-weight: bold;
			margin-top: 0.5em;
			overflow: hidden;
			position: relative;
			padding: 0.5em 0.5em 0.5em 1.2em;
			text-decoration: none;
			white-space: nowrap;

			&:hover {
				background-color: var(--pink);
			}

			&:nth-child(even):hover {
				background-color: var(--orange);
			}

			& > span {
				font-weight: normal;
				margin-left: auto;
				padding-left: 0.2em;
			}
		}
	}

	& > div {
		& > ul {
			padding-left: 1em;

			& > li {
				margin-bottom: 0.5em;
			}
		}

		& > p {
			display: block;
			margin: 0.5em 0.2em;
		}
	}
}

section.conversion {
	display: flex;
	gap: 0.2em;

	& > figure {
		flex-grow: 1;
		margin: 1em 0;
	}

	& > div {
		display: flex;
		flex-direction: column;
		font-size: 2em;
		font-weight: normal;
		justify-content: center;
		margin-bottom: 1em;

		&::before {
			content: '⇨';
		}

		&::after {
			content: '⇦';
		}
	}
}

section.text {
	margin-inline: 0.4em;

	ul {
		li {
			margin-block: 0.5em;
		}
	}
}

div.warning {
	background: linear-gradient(10deg, var(--pink), var(--orange));
	border-radius: 0.5em;
	margin: 1em 0;
	padding: 1.5em 1em 1.5em 4.7em;
	position: relative;

	&::before {
		background-image: url('data:image/svg+xml;base64,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');
		background-position-y: center;
		background-repeat: no-repeat;
		color: var(--pink);
		content: '';
		display: block;
		left: 0.4em;
		font-size: 2em;
		font-weight: normal;
		height: 75%;
		line-height: 0.85em;
		position: absolute;
		text-align: center;
		top: 0.3em;
		width: 1.61em;
	}
}

section.font {
	border: 0.2em solid var(--border-color);
	border-radius: 1em;
	padding-bottom: 1em;

	& > h3 {
		border-top: 0.15em solid var(--border-color);
		border-radius: 1em 1em 0 0;
		font-size: 1.5em;
		margin: 1em 0 1em 0;
		padding: 0.4em 0 0 0;
		text-align: center;

		&:first-child {
			border-top: none;
			margin-top: 0;
		}

		&::after {
			background: linear-gradient(90deg, var(--background-color) 0%, var(--border-color) 50%, var(--background-color) 100%);
			content: '';
			display: block;
			height: 0.1em;
			margin: 0.5em auto 0 auto;
			width: min(80%, 20em);
		}
	}

	& > div {
		display: flex;
		flex-wrap: wrap;
	}
}

book-detail > div {
	border: 0.2em solid var(--border-color);
	border-radius: 1em;
	display: grid;
	grid-gap: 1.5em;
	grid-template-columns: 14em auto auto min-content;
	grid-template-rows: 1.7em auto;
	margin-bottom: 1em;
	padding: 1em;

	& > img {
		align-self: center;
		display: block;
		grid-column: 1;
		grid-row: 1 / 3;
		height: 12em;
		margin: auto;
		width: 12em;
	}

	& > .title, & > .author {
		display: block;
		font-size: 1.5em;
		font-weight: bold;
		grid-column: 2;
		grid-row: 1;

		&::after {
			background: linear-gradient(90deg, var(--pink), transparent);
			content: '';
			display: block;
			height: 0.15em;
			margin-top: 0.25em;
			width: 80%;
		}
	}

	& > .author {
		grid-column: 3;

		&::after {
			background: linear-gradient(90deg, var(--orange), transparent);
		}
	}

	& > .description {
		display: block;
		grid-column: 2 / 4;
		grid-row: 2;
		text-align: justify;
	}

	& > dl {
		display: grid;
		grid-column: 4;
		grid-gap: 0.5em 0;
		grid-row: 1;
		height: min-content;
		margin: 0;
		width: min-content;

		dt {
			background-color: var(--grey-background-color);
			border-bottom-left-radius: 0.5em;
			border-top-left-radius: 0.5em;
			font-weight: bold;
			grid-column: 1;
			padding: 0.5em;
		}

		dd {
			background-color: var(--grey-background-color);
			border-bottom-right-radius: 0.5em;
			border-top-right-radius: 0.5em;
			grid-column: 2;
			margin: 0;
			padding: 0.5em;
		}

		.isbn {
			white-space: nowrap;
		}
	}
}

footer {
	background: linear-gradient(180deg, var(--border-color), var(--background-color) 0.2em);
	color: var(--grey-text-color);
	font-weight: bold;
	margin: auto;
	padding: 0.5em 0 1em 0;
	width: 100%;

	p {
		margin: 0;
		text-align: center;
	}

	a {
		color: var(--grey-text-color);
		text-decoration: underline;

		&:hover {
			color: var(--text-color);
		}
	}
}

body.ig {
	h1 span {
		font-size: 27px;
	}

	header {
		min-height: 0;

		& > .menu {
			font-size: 32px;
			line-height: 52px;
			min-width: 52px;
		}
	}
}