@import url('syntax-highlight/default.css') (prefers-color-scheme: light);
@import url('syntax-highlight/monokai.css') (prefers-color-scheme: dark);

:root {
	--font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
	--font-size-base: 20px;
	--line-height-base: 1.4;
	--line-height-headings: 1.2;
	--color-text: #404040;
	--color-primary: #00759a;
	--color-primary-light: #edf6f9;
	--color-primary-dark: #003b4d;
	--color-primary-300: #27a9c8;
	--color-secondary: #d49b00;
}

html {
	font-family: var(--font-family-base);
	height: 100%;
}

body {
	display: grid;
	grid-template-rows: auto 1fr auto;
	min-height: 100%;
	margin: 0;
	font-size: var(--font-size-base);
	line-height: var(--line-height-base);
	color: var(--color-text);
	background-color: #fff;
}

header {
	--background-gradient: linear-gradient(
		in oklab 90deg,
		var(--color-primary-dark),
		var(--color-primary-300)
	);
	padding: 40px 0;
	background: var(--color-primary) var(--background-gradient) no-repeat 0 0;
	color: #fff;

	.wrapper {
		display: flex;
		justify-content: space-between;
		align-items: start;
	}

	a {
		font-size: 14px;
		font-weight: 600;
		text-transform: uppercase;
		text-decoration: none;
		color: inherit;

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

	ul {
		display: flex;
		flex-wrap: wrap;
		list-style-type: none;
		gap: 0 20px;
		padding: 0;
		margin: 0;
	}
}

h1,
h2,
h3,
h4,
h5 {
	text-transform: uppercase;
	color: var(--color-primary);
}

h1 {
	margin: 50px 0 10px 0;
	font-size: 30px;
	line-height: var(--line-height-headings);
	font-weight: 600;
}

h2 {
	margin: 40px 0 10px 0;
	font-size: 24px;
	line-height: var(--line-height-headings);
}

h3 {
	font-size: 18px;
	margin: 40px 0 5px 0;
}

h4 {
	font-size: 16px;
	margin: 20px 0 5px 0;
}

h5 {
	font-size: 14px;
	margin: 20px 0 5px 0;
}

p {
	margin-top: 20px;
	margin-bottom: 20px;

	:first-child {
		margin-top: 0;
	}

	:last-child {
		margin-bottom: 0;
	}
}

a {
	color: var(--color-primary);
	text-decoration-thickness: 1px;

	&:hover {
		text-decoration: none;
	}
}

code {
	font-size: 90%;
	line-height: 1.3;
}

small {
	font-size: 85%;
}

blockquote {
	margin: 40px 0;
	padding: 20px;
	font-size: 24px;
	text-align: center;
	color: var(--color-primary);
	background-color: var(--color-primary-light);

	:first-child {
		margin-top: 0;
	}

	:last-child {
		margin-bottom: 0;
	}
}

footer {
	margin-top: 80px;
	padding: 40px 0;
	font-size: 16px;
	background-color: var(--color-primary-dark);
	color: #fff;
}

address {
	font-style: normal;
}

figure {
	margin: 0;
}

.wrapper {
	box-sizing: border-box;
	max-width: 1280px;
	margin: 0 auto;
}

.logo {
	line-height: 40px;

	a {
		display: block;
		width: 226px;
		height: 0;
		padding-top: 42px;
		overflow: hidden;
		background: url(../img/postcodeeu-logo.svg) no-repeat 0 0;
		background-size: contain;
	}
}

.footer-copyright {
	box-sizing: border-box;
	text-align: center;
	opacity: .65;
}

.kb-entries {
	padding: 20px 40px;
	background-color: var(--color-primary-light);

	::marker {
		color: var(--color-primary);
	}

	li + li {
		margin-top: 10px;
	}
}

.highlight pre {
	padding: 10px 20px;
	background-color: var(--color-primary-light);
}

@media (max-width: 1366px) {
	.wrapper {
		padding-left: 40px;
		padding-right: 40px;
	}
}

@media (max-width: 1024px) {
	.wrapper {
		padding-left: 20px;
		padding-right: 20px;
	}

	header {
		padding: 20px 0;

		.wrapper {
			display: block;
		}
	}

	.nav-primary {
		margin-top: 10px;
	}

	.nav-language {
		position: absolute;
		top: 20px;
		right: 40px;
	}
}

@media (max-width: 640px) {
	header {
		padding-top: 10px;
	}

	.wrapper {
		padding-left: 10px;
		padding-right: 10px;
	}

	.nav-primary {
		margin-bottom: 20px;
	}

	.nav-language {
		position: static;
	}
}

@media (prefers-color-scheme: dark) {
	:root {
		--color-text: oklch(from var(--color-primary-light) .9 c h);
	}

	body {
		background-color: oklch(from var(--color-primary) .25 calc(c * .25) h);
	}

	header {
		--background-gradient: linear-gradient(
			in oklab 90deg,
			var(--color-primary-dark),
			oklch(from var(--color-primary-300) .5 c h)
		);
	}

	h1,
	h2,
	h3,
	h4,
	h5 {
		color: oklch(from var(--color-primary-light) .85 c h);
	}

	a {
		color: var(--color-primary-300);
	}

	.kb-entries {
		background-color: oklch(from var(--color-primary) .3 calc(c * .45) h);

		a,
		::marker {
			color: var(--color-text);
			opacity: .85;
		}
	}

	.highlight pre {
		background-color: oklch(from var(--color-primary) .2 calc(c * .2) h);
	}

}