@charset "UTF-8";

/* == base ============================================================== */

:root {
	color-scheme: light dark;

	--background: light-dark(white, hsl(220, 18%, 7%));
	--text: light-dark(hsla(0, 0%, 0%, .85), hsla(0, 0%, 100%, .9));
	--secondary-text: light-dark(hsla(0, 0%, 0%, .6), hsla(0, 0%, 100%, .62));
	--tertiary-text: light-dark(hsla(0, 0%, 0%, .45), hsla(0, 0%, 100%, .45));
	--separator: light-dark(hsla(0, 0%, 0%, .1), hsla(0, 0%, 100%, .12));
	--card-background: light-dark(hsla(0, 0%, 0%, .03), hsla(0, 0%, 100%, .05));

	/* scholarly ink blue; brightened on dark surfaces for legibility */
	--ink: hsl(215, 70%, 38%);
	--accent: light-dark(var(--ink), hsl(215, 85%, 70%));

	--mono: ui-monospace, 'SF Mono', 'Menlo', 'Cascadia Mono', monospace;
}

* {
	margin: 0;
	padding: 0;
}

html {
	/* global type scale: all rem-based sizes and widths grow together */
	font-size: 110%;
}

body {
	font: 1rem/1.6 -apple-system, BlinkMacSystemFont, 'SF Pro', 'Helvetica Neue', 'Segoe UI', sans-serif;
	color: var(--text);
	background: var(--background);
	-webkit-text-size-adjust: 100%;
}

a {
	color: var(--accent);
	text-decoration: none;
}
a:hover {
	text-decoration: underline;
}

h2 {
	font-size: 1.5rem;
	font-weight: 600;
	text-align: center;
	margin-block-end: 2rem;
}

h3 {
	font-size: 1.05rem;
	font-weight: 600;
}

main > section {
	padding: 3rem 1.25rem;
}


/* == header ============================================================ */

header nav ul {
	display: flex;
	justify-content: flex-end;
	gap: 1.75rem;
	list-style: none;
	padding: 1.1rem 1.25rem;
}

header nav a {
	color: var(--secondary-text);
	font-size: 1rem;
}
header nav a:hover {
	color: var(--accent);
	text-decoration: none;
}


/* == hero ============================================================== */

#top {
	text-align: center;
	padding-block-start: 3.5rem;
	padding-block-end: 1rem;
}

.logo {
	border-radius: 24px;
	box-shadow: 0 8px 32px light-dark(hsla(0, 10%, 20%, .18), hsla(0, 0%, 0%, .55));
	margin-block-end: 1.5rem;
}

#top h1 {
	font-family: var(--mono);
	font-size: 2.6rem;
	font-weight: 700;
	letter-spacing: -0.02em;
	margin-block-start: 0.5rem;
}

.tagline {
	font-size: 1.15rem;
	color: var(--secondary-text);
	margin-block-start: 0.5rem;
}

#latest {
	margin-block-start: 2rem;
}

.badge {
	display: inline-block;
	padding: 0.65em 1.5em;
	border: 1px solid var(--separator);
	border-radius: 2em;
	font-size: 0.95rem;
	font-weight: 500;
	color: var(--secondary-text);
	background: var(--card-background);
	cursor: default;
}

.phase {
	font-family: var(--mono);
	font-size: 0.8rem;
	color: var(--tertiary-text);
	margin-block-start: 1rem;
}


/* == how =============================================================== */

#how {
	max-width: 60rem;
	margin-inline: auto;
	padding-block-end: 1rem;
}

#how > div {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
	gap: 1.25rem;
}

#how > div > section {
	padding: 1.4rem 1.5rem;
	background: var(--card-background);
	border-radius: 14px;
}

#how h2 {
	font-size: 1.05rem;
	font-weight: 600;
	text-align: start;
	margin-block-end: 0.4rem;
}

#how p {
	font-size: 0.925rem;
	color: var(--secondary-text);
}


/* == course sections =================================================== */

#sustech, #berkeley, #oxford, #other {
	max-width: 60rem;
	margin-inline: auto;
}

#sustech h2, #berkeley h2, #oxford h2, #other h2 {
	font-family: var(--mono);
	font-weight: 500;
	color: var(--tertiary-text);
}
#sustech h2::before, #berkeley h2::before, #oxford h2::before, #other h2::before {
	content: '# ';
}

.group {
	font-family: var(--mono);
	font-size: 0.85rem;
	font-weight: 500;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: var(--tertiary-text);
	margin-block: 1.75rem 0.9rem;
}

.grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr));
	gap: 1.25rem;
}

.card {
	display: flex;
	flex-direction: column;
	padding: 1.3rem 1.5rem;
	background: var(--card-background);
	border-radius: 14px;
}

.card .code {
	font-family: var(--mono);
	font-size: 0.75rem;
	letter-spacing: 0.06em;
	color: var(--tertiary-text);
}

.card h3 {
	line-height: 1.4;
	margin-block: 0.25rem 0.35rem;
}

.card h3 a {
	color: var(--text);
}
.card h3 a:hover {
	color: var(--accent);
	text-decoration: none;
}

.card .term {
	font-size: 0.85rem;
	color: var(--tertiary-text);
}

.card .links {
	margin-block-start: auto;
	padding-block-start: 0.8rem;
	font-size: 0.875rem;
	font-weight: 500;
}

.card .links a + a {
	margin-inline-start: 1.1rem;
}


/* == contact + develop ================================================= */

#contact {
	text-align: center;
	padding-block: 4.5rem 0;
}

.prose + #contact {
	padding-block-end: 4.5rem;
}

#contact h3 {
	font-size: 1.05rem;
	font-weight: 600;
}

#contact p {
	color: var(--secondary-text);
	max-width: 32rem;
	margin: 0.5rem auto 0;
}

#contact .github {
	display: inline-block;
	margin-block-start: 1.75rem;
	padding: 0.65em 1.5em;
	border: 1px solid var(--accent);
	border-radius: 2em;
	font-size: 0.95rem;
	font-weight: 500;
}
#contact .github:hover {
	background: var(--accent);
	color: var(--background);
	text-decoration: none;
}

#develop {
	text-align: center;
	padding-block: 4.5rem;
}

#develop h3 {
	font-size: 1.05rem;
	font-weight: 600;
}

#develop p {
	color: var(--secondary-text);
	max-width: 32rem;
	margin: 0.5rem auto 0;
}

#develop .github {
	display: inline-block;
	margin-block-start: 1.75rem;
	padding: 0.65em 1.5em;
	border: 1px solid var(--accent);
	border-radius: 2em;
	font-size: 0.95rem;
	font-weight: 500;
}
#develop .github:hover {
	background: var(--accent);
	color: var(--background);
	text-decoration: none;
}


/* == footer ============================================================ */

footer {
	border-block-start: 1px solid var(--separator);
	padding: 2rem 1.5rem;
	text-align: center;
}

footer .copyright {
	font-size: 0.85rem;
	color: var(--tertiary-text);
}


/* == prose (conduct page) ============================================== */

.prose {
	max-width: 36rem;
	margin-inline: auto;
	padding: 0 1.25rem 3rem;
}

.prose section + section {
	margin-block-start: 2.75rem;
}

.prose h2 {
	font-family: var(--mono);
	font-size: 1.15rem;
	font-weight: 500;
	text-align: start;
	color: var(--tertiary-text);
	margin-block-end: 0.9rem;
}
.prose h2::before { content: '# '; }

.prose h3 {
	font-size: 1rem;
	font-weight: 600;
	margin-block: 1.5rem 0.4rem;
}

.prose p {
	color: var(--secondary-text);
	margin-block-start: 0.6rem;
}

.prose strong, .prose em {
	color: var(--text);
}

.prose ul {
	list-style: none;
	margin-block-start: 0.6rem;
}

.prose li {
	color: var(--secondary-text);
	padding-inline-start: 1.1rem;
	position: relative;
}

.prose li + li {
	margin-block-start: 0.5rem;
}

.prose li::before {
	content: '·';
	position: absolute;
	inset-inline-start: 0.2rem;
	color: var(--accent);
	font-weight: 700;
}