/* ==========================================================================
   jrleja.github.io
   Hand-written replacement for the 2018 HTML5 UP "Read Only" stylesheet.

   Preserves the layout that defines the site -- a fixed teal sidebar on the
   right, content column on the left -- while dropping jQuery, Font Awesome,
   and the render-blocking Google Fonts import.

   Everything is driven by the custom properties in :root. To retheme the
   site, change those and nothing else.
   ========================================================================== */

/* --- Tokens --------------------------------------------------------------- */

:root {
	/* Brand. Deepened from the old theme's #4acaa8, which gave white text only
	   2.04:1 contrast -- well under the WCAG AA floor of 4.5:1. These clear it:
	   the sidebar is 5.23:1 and link text on white is 5.24:1. Same hue, and
	   still the only place to change it. */
	--accent: #1a7a62;
	--accent-strong: #11543f;
	--sidebar-bg: #1d7a63;
	--sidebar-fg: #ffffff;
	--sidebar-fg-dim: rgba(255, 255, 255, 0.92);
	--sidebar-rule: rgba(255, 255, 255, 0.24);

	/* Surfaces and text. */
	--bg: #ffffff;
	--bg-sunken: #f7f8f8;
	--fg: #454b4d;
	--fg-strong: #21262a;
	--fg-dim: #6b7378;
	--rule: #e3e7e8;

	/* Type. A system stack: no network request, no layout shift. */
	--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
		"Helvetica Neue", Arial, sans-serif;
	--font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;

	/* Rhythm. */
	--sidebar-w: 23em;
	--container-w: 45em;
	--gap: 1.5rem;
	--radius: 8px;

	color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
	:root {
		--accent: #5fd3b4;
		--accent-strong: #85e0c6;
		--sidebar-bg: #1c5f50;
		--sidebar-fg: #f2fbf8;
		--sidebar-fg-dim: rgba(242, 251, 248, 0.8);
		--sidebar-rule: rgba(242, 251, 248, 0.22);

		--bg: #14181a;
		--bg-sunken: #1b2023;
		--fg: #c3cacd;
		--fg-strong: #eef2f3;
		--fg-dim: #8c969b;
		--rule: #2b3336;
	}
}

/* --- Base ----------------------------------------------------------------- */

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

html {
	scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
	html {
		scroll-behavior: auto;
	}
	*,
	*::before,
	*::after {
		transition-duration: 0.01ms !important;
		animation-duration: 0.01ms !important;
	}
}

body {
	margin: 0;
	background: var(--bg);
	color: var(--fg);
	font: 400 16px/1.65 var(--font-sans);
	-webkit-font-smoothing: antialiased;
	text-rendering: optimizeLegibility;
}

img {
	max-width: 100%;
	height: auto;
	display: block;
}

code,
pre {
	font-family: var(--font-mono);
	font-size: 0.9em;
}

a {
	color: var(--accent);
	text-decoration-thickness: 1px;
	text-underline-offset: 2px;
}

a:hover {
	color: var(--accent-strong);
}

:where(a, button, [tabindex]):focus-visible {
	outline: 2px solid var(--accent);
	outline-offset: 2px;
	border-radius: 2px;
}

h1,
h2,
h3,
h4 {
	color: var(--fg-strong);
	line-height: 1.25;
	margin: 0 0 0.6em;
	font-weight: 600;
}

h2 {
	font-size: 1.05rem;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: var(--fg-dim);
	font-weight: 700;
}

h3 {
	font-size: 1.3rem;
	margin-top: 2.2rem;
}

h4 {
	font-size: 1rem;
}

p {
	margin: 0 0 1.1em;
}

ul,
ol {
	margin: 0 0 1.2em;
	padding-left: 1.3em;
}

li {
	margin-bottom: 0.45em;
}

hr {
	border: 0;
	border-top: 1px solid var(--rule);
	margin: 2.5rem 0;
}

.skip-link {
	position: absolute;
	left: 0.5rem;
	top: -3rem;
	z-index: 10;
	padding: 0.6em 1em;
	background: var(--sidebar-bg);
	color: var(--sidebar-fg);
	font-size: 0.9rem;
	font-weight: 600;
	border-radius: 0 0 var(--radius) var(--radius);
	transition: top 0.15s;
}

.skip-link:focus {
	top: 0;
	color: var(--sidebar-fg);
}

#main:focus {
	outline: none;
}

/* --- Sidebar -------------------------------------------------------------- */

#header {
	background: var(--sidebar-bg);
	color: var(--sidebar-fg);
	display: flex;
	flex-direction: column;
	gap: var(--gap);
	padding: 2.5rem 2rem;
	text-align: center;
}

/* Keep the sidebar links at the bottom without stretching everything else. */
#header .links {
	margin-top: auto;
	padding-top: 2rem;
}

#header a {
	color: inherit;
}

#header .identity p {
	color: var(--sidebar-fg-dim);
	font-size: 0.92rem;
	margin: 0;
}

.image.avatar {
	display: block;
	width: 8.5em;
	margin: 0 auto 1.25rem;
	border-radius: 50%;
	overflow: hidden;
	aspect-ratio: 1;
	box-shadow: 0 2px 14px rgba(0, 0, 0, 0.18);
}

.image.avatar img {
	width: 100%;
	height: 100%;
	object-fit: cover;
}

#logo {
	font-size: 1.7rem;
	font-weight: 700;
	letter-spacing: -0.01em;
	color: var(--sidebar-fg);
	margin: 0 0 0.35rem;
}

#logo a {
	text-decoration: none;
}

/* Nav */

#nav ul {
	list-style: none;
	margin: 0;
	padding: 0;
}

#nav li {
	margin: 0;
	border-top: 1px solid var(--sidebar-rule);
}

#nav li:last-child {
	border-bottom: 1px solid var(--sidebar-rule);
}

#nav a {
	display: block;
	padding: 0.75em 0.5em;
	font-size: 0.82rem;
	font-weight: 600;
	letter-spacing: 0.1em;
	text-transform: uppercase;
	text-decoration: none;
	color: var(--sidebar-fg-dim);
	transition: color 0.15s, background-color 0.15s;
}

#nav a:hover {
	color: var(--sidebar-fg);
	background: rgba(255, 255, 255, 0.08);
}

#nav a.active {
	color: var(--sidebar-fg);
	background: rgba(255, 255, 255, 0.14);
}

/* Sidebar footer links */

.icons {
	list-style: none;
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: center;
	gap: 0.4rem 1rem;
	margin: 0;
	padding: 0;
}

.icons li {
	margin: 0;
}

.icons a {
	display: inline-flex;
	align-items: center;
	gap: 0.4em;
	font-size: 0.85rem;
	font-weight: 700;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	text-decoration: none;
	color: var(--sidebar-fg-dim);
	transition: color 0.15s;
}

.icons a:hover {
	color: var(--sidebar-fg);
}

.icons svg {
	width: 1.15em;
	height: 1.15em;
}

/* In the old icon-font design this text was hidden; here it labels the icon. */
.icons .label {
	font-size: inherit;
}

/* --- Layout --------------------------------------------------------------- */

#wrapper {
	min-height: 100vh;
}

.container {
	max-width: var(--container-w);
	margin: 0 auto;
	padding: 0 2rem;
}

#main > section {
	padding: 3.5rem 0;
	border-bottom: 1px solid var(--rule);
	scroll-margin-top: 1rem;
}

#main > section:first-child {
	padding-top: 0;
}

#main > section:last-child {
	border-bottom: 0;
}

/* Banner */

.image.main {
	margin: 0 0 2rem;
}

.image.main img {
	width: 100%;
	max-height: 22rem;
	object-fit: contain;
	background: #ffffff;
	border-radius: var(--radius);
	padding: 0.75rem;
}

header.major {
	margin-bottom: 1.75rem;
	padding-bottom: 0.6rem;
	border-bottom: 1px solid var(--rule);
}

header.major h2 {
	margin: 0;
}

/* --- People grid ---------------------------------------------------------- */

.people-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(10.5rem, 1fr));
	gap: 2rem 1.75rem;
	align-items: start;
	margin-bottom: 1rem;
}

.person {
	display: flex;
	flex-direction: column;
	gap: 0.7rem;
}

.person .image-wrap {
	overflow: hidden;
	border-radius: var(--radius);
	background: var(--bg-sunken);
	aspect-ratio: 1;
}

.person .image-wrap img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	transition: transform 0.25s ease;
}

.person a:hover img {
	transform: scale(1.03);
}

.person h4 {
	margin: 0;
	font-size: 0.9rem;
	font-weight: 400;
	line-height: 1.5;
	color: var(--fg);
}

.person h4 b {
	display: block;
	color: var(--fg-strong);
	font-weight: 600;
	margin-bottom: 0.15em;
}

/* --- Alumni list ---------------------------------------------------------- */

.alumni-heading {
	margin-top: 2.75rem;
}

ul.alumni {
	list-style: none;
	padding: 0;
	margin: 0 0 1.75rem;
	font-size: 0.94rem;
}

ul.alumni li {
	padding: 0.5em 0;
	border-bottom: 1px solid var(--rule);
	margin: 0;
	color: var(--fg-dim);
}

ul.alumni li:last-child {
	border-bottom: 0;
}

ul.alumni b {
	color: var(--fg-strong);
	font-weight: 600;
}

/* --- Press ---------------------------------------------------------------- */

ul.press {
	list-style: none;
	padding: 0;
	margin: 0;
}

ul.press > li {
	padding: 0.9em 0;
	border-bottom: 1px solid var(--rule);
	margin: 0;
}

ul.press > li:last-child {
	border-bottom: 0;
}

ul.press b {
	display: inline-block;
	min-width: 6.5em;
	color: var(--fg-dim);
	font-size: 0.82rem;
	font-weight: 700;
	letter-spacing: 0.05em;
	text-transform: uppercase;
}

/* --- Talks ---------------------------------------------------------------- */

ul.talks {
	list-style: none;
	padding: 0;
	margin: 0 0 1.5rem;
	font-size: 0.94rem;
}

ul.talks li {
	display: flex;
	justify-content: space-between;
	gap: 1rem;
	padding: 0.45em 0;
	border-bottom: 1px solid var(--rule);
	margin: 0;
}

ul.talks .date {
	flex: none;
	color: var(--fg-dim);
	font-variant-numeric: tabular-nums;
	font-size: 0.88rem;
}

/* --- Publications --------------------------------------------------------- */

ol.pubs {
	padding-left: 1.4em;
	font-size: 0.94rem;
}

ol.pubs li {
	margin-bottom: 0.9em;
}

/* --- Figures (Research) --------------------------------------------------- */

#main .figure {
	margin: 2rem 0 2.5rem;
}

#main .figure .image img {
	width: 100%;
	border-radius: var(--radius);
	background: var(--bg-sunken);
}

#main .figure {
	margin-inline: 0;
}

#main .figure figcaption {
	margin-top: 0.7rem;
	font-size: 0.88rem;
	font-style: italic;
	color: var(--fg-dim);
	line-height: 1.5;
}

/* --- Features (Outreach) -------------------------------------------------- */

.features {
	display: grid;
	gap: 2.5rem;
}

.features article {
	display: grid;
	grid-template-columns: minmax(0, 14rem) minmax(0, 1fr);
	gap: 1.5rem;
	align-items: start;
	margin: 0;
}

.features .image img {
	border-radius: var(--radius);
	aspect-ratio: 4 / 3;
	object-fit: cover;
	width: 100%;
}

.features .inner h3 {
	margin-top: 0;
	font-size: 1.05rem;
}

.features .inner p:last-child {
	margin-bottom: 0;
}

/* --- Page footer ---------------------------------------------------------- */

#footer {
	padding: 2.5rem 0 3rem;
	background: var(--bg-sunken);
	border-top: 1px solid var(--rule);
}

.copyright {
	margin: 0;
	font-size: 0.84rem;
	color: var(--fg-dim);
}

/* --- Responsive ----------------------------------------------------------- */

/* Desktop: sidebar pinned right, content column to its left. */
@media screen and (min-width: 1000px) {
	#header {
		position: fixed;
		top: 0;
		right: 0;
		width: var(--sidebar-w);
		height: 100vh;
		overflow-y: auto;
		padding: 3rem 2rem;
	}

	#wrapper {
		margin-right: var(--sidebar-w);
	}

	#main > section {
		scroll-margin-top: 0;
	}
}

/* Tablet and below: the sidebar becomes a normal header at the top. No JS
   panel, no hamburger -- it simply stacks. */
@media screen and (max-width: 999px) {
	#header {
		padding: 2.5rem 1.5rem 1.75rem;
	}

	#nav ul {
		display: flex;
		flex-wrap: wrap;
		justify-content: center;
		gap: 0 0.25rem;
	}

	#nav li,
	#nav li:last-child {
		border: 0;
	}

	#nav a {
		padding: 0.5em 0.75em;
		border-radius: 999px;
	}

	.image.main img {
		max-height: 14rem;
	}
}

@media screen and (max-width: 640px) {
	body {
		font-size: 15px;
	}

	.container {
		padding: 0 1.25rem;
	}

	#main > section {
		padding: 2.5rem 0;
	}

	.people-grid {
		grid-template-columns: repeat(auto-fit, minmax(9.5rem, 1fr));
		gap: 1.5rem 1.25rem;
	}

	/* Stack the outreach blocks rather than squeezing a 2-column grid. */
	.features article {
		grid-template-columns: 1fr;
		gap: 1rem;
	}

	.features .image img {
		aspect-ratio: 16 / 9;
	}

	ul.press b {
		display: block;
		min-width: 0;
		margin-bottom: 0.2em;
	}

	ul.talks li {
		flex-direction: column;
		gap: 0.15rem;
	}
}

/* --- Print ---------------------------------------------------------------- */

@media print {
	#header,
	#footer {
		display: none;
	}

	#wrapper {
		margin: 0;
	}

	body {
		color: #000;
		background: #fff;
	}

	a {
		color: #000;
	}
}