:root {
    --primer-color-accent: 255, 255, 0;
    --color-accent: yellow;
	--hue-accent: 0deg;

    --padding: 20px;
	--running-size: 80px;
	--header-search-size: var(--running-size);
}

/* # Cornerstones */

* {
    margin: 0;
    box-sizing: border-box;
    font-family: "Roboto Mono", sans-serif;
    color: inherit;
	font-size: inherit;
}

::-webkit-scrollbar {
    display: none;
}

body {
	display: grid;
	justify-items: center;
	grid-template-rows: var(--running-size) 1fr;
    overscroll-behavior: none;
	background-color: black;
    color: white;
	overflow-x: hidden;
	min-height: 100svh;
	font-size: 15px;
}

body::before {
	transition: 1s opacity;
	content: "";
	position: absolute;
	top: -5%;
	right: 0;
	width: 20%;
	height: 5%;
	border-radius: 100%;
	z-index: 1000;
	box-shadow:
		0 0 30svh 10svh rgba(var(--primer-color-accent), .2),
		0 0 30svh 60svh rgba(var(--primer-color-accent), .1),
		0 0 30svh 150svh rgba(var(--primer-color-accent), .02)
	;
	opacity: 0;
}

/* "enable" the corner glow effect on initial load when a page has been fully loaded */
body[vv-top-page]::before {
	opacity: 1;
}

a {
    display: contents;
    color: inherit;
    text-decoration: none;
}

/* # Components */

:is(h1, h2, h3, p, li) > a {
	--underline-tickness: 3px;

    display: initial;
    text-decoration: underline;
    text-decoration-thickness: var(--underline-tickness);
	text-underline-offset: var(--underline-tickness);
    text-decoration-color: var(--color-accent);
}

h1 {
	font-size: 30px;
	color: var(--color-accent);
}

h2 {
	font-size: 30px;
}

h3 {
	font-size: 25px;
}

/* ## Buttons */

button {
	border: none;
	background-color: transparent;
	color: inherit;
	fill: inherit;
	cursor: pointer;
}

/* ### Inline */

button.inline {
	padding: calc(var(--padding) / 2) var(--padding);
	color: white;
	border: solid 2px white;
	border-radius: 6px;
}

button.inline.solid {
	color: black;
	border-color: var(--color-accent);
	background-color: var(--color-accent);
}

a > button::after {
	content: " ➜";
}

/* ### Text links */

a[target="_blank"] > button::after,
:is(h1, h2, h3, p, li) > a[target="_blank"]::after {
	content: " ↑";
	color: var(--color-accent);
	white-space: nowrap;
}

a > button.solid:not(:hover)::after {
	color: black;
}

/* ## Header */

header {
	--border-style: solid 1px rgba(255, 255, 255, .2);

	position: sticky;
	top: 0;
	width: 100%;
	height: var(--running-size);
	border-bottom: var(--border-style);
	display: grid;
	align-items: stretch;
	grid-template-columns: 1fr var(--header-search-size) var(--running-size);
	grid-template-rows: var(--running-size);
	background-color: rgba(0, 0, 0, .8);
	z-index: 100;
	perspective: 3000px;
	-webkit-backdrop-filter: blur(20px);
	backdrop-filter: blur(20px);
	overflow: hidden;
}

header > * {
	--anim-3d-depth: 5px;
	--anim-3d-peek: 25deg;

	transition: 300ms background-color;
	transform: rotateX(0deg);
	backface-visibility: hidden;
	box-shadow: 0 var(--anim-3d-depth) 0 0 rgba(255, 255, 255, .2);
}

/* enable 3d flip animation */
@media not (prefers-reduced-motion: reduce) {
	header > * {
		--transform-duration: 600ms;

		transition: var(--transform-duration) transform, 300ms background-color;
	}
}

header nav {
	display: flex;
	align-items: center;
	padding: var(--padding);
}

header .logo {
	fill: none;
}

header .logo path.stroke {
	fill: var(--color-accent);
}

header header .search {
	display: none;
}

/* ### Buttons */

header button {
	--icon-size: 25px;

	display: grid;
	width: 100%;
	border-left: var(--border-style);
	grid-template-columns: 1fr;
	align-items: center;
	justify-items: center;
	padding: var(--padding);
	gap: var(--padding);
	fill: var(--color-accent);
	font-size: 13px;
	color: rgba(255, 255, 255, .5);
	cursor: pointer;
}

header button:not(.logo) svg {
	width: var(--icon-size);
}

header button.search p {
	display: none;
}

/* ### Searchbox */

header searchbox {
	position: absolute;
	right: 0;
	width: 100%;
	height: var(--running-size);
	background-color: var(--color-accent);
	display: grid;
	align-items: stretch;
	grid-template-columns: 1fr var(--running-size);
	grid-template-rows: var(--running-size);
	box-shadow: none;
	transform: rotateX(180deg);
}

header searchbox > * {
	box-shadow: 0 calc(var(--anim-3d-depth) * -1) 0 0 rgba(var(--primer-color-accent), .8);
}

header searchbox button {
	transition: 300ms background-color, 300ms border-color;
	border-color: rgba(0, 0, 0, .1);
	fill: black;
}

header searchbox input {
	padding: 0 var(--padding);
	background-color: transparent;
	outline: none;
	color: black;
	border: none;
}

/* #### Active */

header.searchboxActive > * {
	transform: rotateX(-180deg);
}

header.searchboxActive searchbox {
	transform: rotateX(0);
}

/* ## Main */

main {
	position: relative;
	padding: calc(var(--padding) * 1.5);
	width: 100%;
	max-width: 1000px;
}

main > * {
	transition: 100ms opacity;
	opacity: 1;
}

main.loading > * {
	opacity: 0;
}

/* ## Search results */

search-results {
	transition: 500ms opacity, 300ms transform;
	position: fixed;
	top: var(--running-size);
	right: 0;
	width: 100%;
	padding: var(--padding);
	height: calc(100svh - var(--running-size));
	background-color: black;
	pointer-events: none;
	opacity: 0;
	transform: scale(.99);
	transform-origin: 100% 0;
	overflow-y: scroll;
}

search-results:not([vv-page]) {
	display: grid;
	align-items: center;
	justify-items: center;
}

header.searchboxActive ~ search-results {
	opacity: 1;
	pointer-events: all;
	transform: scale(1);
}

/* ### "Start typing" prompt */

search-results .info {
	display: flex;
	align-items: center;
	flex-direction: column;
	margin: auto;
	gap: 3svh;
}

search-results .info :is(svg, img) {
	width: 128px;
	fill: var(--color-accent);
}

/* # Feature queries */

@media (hover: hover) {
	:is(h1, h2, h3, p, li) > a:hover {
		text-underline-offset: 1px;
		text-decoration-thickness: calc(var(--underline-tickness) * 2);
		color: var(--color-accent);
	}

	/* # Components */

	button.inline {
		transition: 200ms background-color, 200ms border-color, 200ms color;
	}

	button:hover {
		border-color: rgba(255, 255, 255, .2);
		background-color: rgba(255, 255, 255, .1);
	}

	button.solid:hover {
		color: var(--color-accent);
		border-color: rgba(var(--primer-color-accent), .2);
		background-color: rgba(var(--primer-color-accent), .2);
		box-shadow: 0 -10px 20px 10px rgba(var(--primer-color-accent), .05);
	}

	/* ## Header */

	header .logo:hover path.solid {
		fill: var(--color-accent);
	}

	header searchbox button:hover {
		background-color: rgba(0, 0, 0, .08);
	}

	/* ### Search */

	@media not (prefers-reduced-motion: reduce) {
		header:not(.searchboxActive) button.search:hover,
		header:not(.searchboxActive) button.search:hover + button.logo {
			transform: rotateX(calc(var(--anim-3d-peek) * -1));
		}

		header:not(.searchboxActive) button.search:hover ~ searchbox {
			transform: rotateX(calc(180deg - var(--anim-3d-peek)));
		}
	}
}

/* # Size queries */

@media (min-width: 700px) {
	:root {
		--header-search-size: 250px;
	}

	/* # Cornerstones */

	body::before {
		right: unset;
		left: 0;
		box-shadow:
			0 0 30svh 10svh rgba(var(--primer-color-accent), .1),
			0 0 30svh 60svh rgba(var(--primer-color-accent), .05),
			0 0 30svh 150svh rgba(var(--primer-color-accent), .02)
		;
	}

	/* ## Header */

	header nav {
		margin: 0 calc(var(--padding) / 2);
	}

	header > button.search {
		grid-template-columns: var(--icon-size) 1fr;
	}

	header > button.search p {
		display: initial;
	}

	header.searchboxActive > nav {
		transform: rotateX(0deg);
		pointer-events: all;
	}

	/* ### Searchbox */

	header searchbox {
		width: calc(var(--header-search-size) + var(--running-size));
	}

	/* ### Menu */

	/* Move the search box to the header */
	header > button.search {
		display: grid;
		justify-items: baseline;
	}

	@media (min-height: 600px) {
		search-results {
			top: calc(var(--running-size) + var(--padding));
			width: 50%;
			height: calc(100svh - 100px);
			background-color: rgba(0, 0, 0, .8);
			box-shadow: 
				inset 0 0 100px 200px rgba(0, 0, 0, 1),
				0 0 100px 200px rgba(0, 0, 0, 1)
			;
			--webkit-backdrop-filter: blur(15px);
			backdrop-filter: blur(15px);
		}
	}
}