/* Design tokens — single source of truth for theme */
:root {
	--color-bg: #f6f4f0;
	--color-surface: #ffffff;
	--color-ink: #1a1f2b;
	--color-muted: #5c6478;
	--color-accent: #2f6f64;
	--color-accent-soft: #e3f0ec;
	--color-border: #d9d4cc;
	--color-focus: #1f5bff;
	--font-sans:
		'DM Sans', system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial,
		sans-serif;
	--font-serif: 'Source Serif 4', Georgia, 'Times New Roman', serif;
	--radius-sm: 8px;
	--radius-md: 14px;
	--shadow-sm: 0 1px 2px rgba(26, 31, 43, 0.06);
	--shadow-md: 0 12px 40px rgba(26, 31, 43, 0.08);
	--space-1: 0.25rem;
	--space-2: 0.5rem;
	--space-3: 0.75rem;
	--space-4: 1rem;
	--space-5: 1.5rem;
	--space-6: 2rem;
	--space-8: 3rem;
	--space-10: 4rem;
	--content-max: 72rem;
	--header-h: 4.25rem;
}

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

html {
	scroll-behavior: smooth;
}

body {
	margin: 0;
	min-height: 100vh;
	font-family: var(--font-sans);
	font-size: 1.0625rem;
	line-height: 1.65;
	color: var(--color-ink);
	background:
		radial-gradient(1200px 600px at 10% -10%, #e8f5f1 0%, transparent 55%),
		radial-gradient(900px 500px at 100% 0%, #efe8ff 0%, transparent 50%),
		var(--color-bg);
}

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

a {
	color: var(--color-accent);
	text-decoration-thickness: 1px;
	text-underline-offset: 3px;
}

a:hover {
	color: #245548;
}

:focus-visible {
	outline: 2px solid var(--color-focus);
	outline-offset: 2px;
}

.visually-hidden {
	position: absolute;
	width: 1px;
	height: 1px;
	padding: 0;
	margin: -1px;
	overflow: hidden;
	clip: rect(0, 0, 0, 0);
	white-space: nowrap;
	border: 0;
}

.skip-link {
	position: absolute;
	left: -999px;
	top: 0;
	z-index: 1000;
	padding: var(--space-3) var(--space-4);
	background: var(--color-ink);
	color: #fff;
	border-radius: 0 0 var(--radius-sm) var(--radius-sm);
}

.skip-link:focus {
	left: var(--space-4);
}

.shell {
	min-height: 100vh;
	display: flex;
	flex-direction: column;
}

main {
	flex: 1;
}

.container {
	width: min(100% - var(--space-6), var(--content-max));
	margin-inline: auto;
}

/* Header */
.site-header {
	position: sticky;
	top: 0;
	z-index: 50;
	background: color-mix(in srgb, var(--color-surface) 92%, transparent);
	backdrop-filter: blur(10px);
	border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
	width: min(100% - var(--space-6), var(--content-max));
	margin-inline: auto;
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--space-4);
	min-height: var(--header-h);
}

.site-logo {
	display: inline-flex;
	align-items: center;
	gap: var(--space-3);
	font-weight: 700;
	color: var(--color-ink);
	text-decoration: none;
}

.site-logo:hover {
	color: var(--color-ink);
}

.site-logo__mark {
	display: grid;
	place-items: center;
	width: 2.5rem;
	height: 2.5rem;
	border-radius: 12px;
	background: linear-gradient(145deg, var(--color-accent), #1f4d44);
	color: #fff;
	font-size: 0.85rem;
	letter-spacing: 0.02em;
}

.site-logo__text {
	letter-spacing: -0.02em;
}

.nav-toggle {
	display: none;
	flex-direction: column;
	justify-content: center;
	gap: 5px;
	width: 2.75rem;
	height: 2.75rem;
	padding: 0;
	border: 1px solid var(--color-border);
	border-radius: var(--radius-sm);
	background: var(--color-surface);
	cursor: pointer;
}

.nav-toggle__bar {
	display: block;
	width: 1.25rem;
	height: 2px;
	margin: 0 auto;
	background: var(--color-ink);
	border-radius: 2px;
}

.site-nav__list {
	list-style: none;
	margin: 0;
	padding: 0;
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: var(--space-2) var(--space-4);
}

.site-nav__link {
	display: inline-block;
	padding: var(--space-2) var(--space-3);
	border-radius: var(--radius-sm);
	color: var(--color-ink);
	text-decoration: none;
	font-weight: 500;
	font-size: 0.95rem;
}

.site-nav__link:hover {
	background: var(--color-accent-soft);
	color: var(--color-accent);
	text-decoration: none;
}

.site-nav__link.is-active {
	background: var(--color-accent-soft);
	color: var(--color-accent);
	text-decoration: none;
}

@media (max-width: 768px) {
	.nav-toggle {
		display: inline-flex;
	}

	.site-nav {
		position: absolute;
		left: 0;
		right: 0;
		top: var(--header-h);
		padding: var(--space-4);
		background: var(--color-surface);
		border-bottom: 1px solid var(--color-border);
		box-shadow: var(--shadow-md);
		display: none;
	}

	.site-nav.is-open {
		display: block;
	}

	.site-nav__list {
		flex-direction: column;
		align-items: stretch;
	}
}

.site-header--fallback .fallback-msg {
	margin: 0;
	padding: var(--space-3) 0;
	color: var(--color-muted);
	font-size: 0.95rem;
}

/* Hero */
.hero {
	padding: var(--space-10) 0 var(--space-8);
}

.hero__grid {
	display: grid;
	gap: var(--space-8);
	align-items: start;
}

@media (min-width: 900px) {
	.hero__grid {
		grid-template-columns: 1.35fr 1fr;
		gap: var(--space-10);
	}
}

.eyebrow {
	display: inline-block;
	font-size: 0.8rem;
	font-weight: 700;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: var(--color-accent);
	margin-bottom: var(--space-3);
}

.hero h1 {
	font-family: var(--font-serif);
	font-size: clamp(2.25rem, 4vw, 3.25rem);
	line-height: 1.15;
	letter-spacing: -0.02em;
	margin: 0 0 var(--space-4);
}

.lede {
	font-size: 1.125rem;
	color: var(--color-muted);
	max-width: 38rem;
	margin: 0 0 var(--space-5);
}

.hero__actions {
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-3);
}

.card {
	background: var(--color-surface);
	border: 1px solid var(--color-border);
	border-radius: var(--radius-md);
	box-shadow: var(--shadow-sm);
	padding: var(--space-5);
}

.card h2 {
	margin: 0 0 var(--space-3);
	font-size: 1.125rem;
}

.card ul {
	margin: 0;
	padding-left: 1.1rem;
	color: var(--color-muted);
}

.card li + li {
	margin-top: var(--space-2);
}

/* Buttons */
.btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: var(--space-2);
	padding: 0.7rem 1.1rem;
	border-radius: 999px;
	font-weight: 600;
	font-size: 0.95rem;
	text-decoration: none;
	border: 1px solid transparent;
	cursor: pointer;
	transition:
		background 0.15s ease,
		color 0.15s ease,
		border-color 0.15s ease;
}

.btn--primary {
	background: var(--color-accent);
	color: #fff;
}

.btn--primary:hover {
	background: #265a50;
	color: #fff;
	text-decoration: none;
}

.btn--ghost {
	background: transparent;
	border-color: var(--color-border);
	color: var(--color-ink);
}

.btn--ghost:hover {
	border-color: var(--color-accent);
	color: var(--color-accent);
	text-decoration: none;
}

/* Sections */
.section {
	padding: var(--space-8) 0;
}

.section--tight {
	padding-top: var(--space-6);
}

.section__title {
	font-family: var(--font-serif);
	font-size: clamp(1.75rem, 2.5vw, 2.25rem);
	margin: 0 0 var(--space-2);
}

.section__intro {
	max-width: 48rem;
	color: var(--color-muted);
	margin: 0 0 var(--space-6);
}

/* Project grid */
.project-grid {
	display: grid;
	gap: var(--space-5);
}

@media (min-width: 720px) {
	.project-grid {
		grid-template-columns: repeat(2, minmax(0, 1fr));
	}
}

@media (min-width: 1100px) {
	.project-grid {
		grid-template-columns: repeat(3, minmax(0, 1fr));
	}

	/* Hub page: two NomNom sides stay paired instead of a sparse third column */
	.project-grid--hub {
		grid-template-columns: repeat(2, minmax(0, 1fr));
		max-width: 56rem;
		margin-inline: auto;
	}
}

.project-card {
	display: flex;
	flex-direction: column;
	height: 100%;
	padding: var(--space-5);
	background: var(--color-surface);
	border: 1px solid var(--color-border);
	border-radius: var(--radius-md);
	box-shadow: var(--shadow-sm);
	text-decoration: none;
	color: inherit;
	transition:
		transform 0.15s ease,
		box-shadow 0.15s ease;
}

.project-card:hover {
	transform: translateY(-2px);
	box-shadow: var(--shadow-md);
	text-decoration: none;
	color: inherit;
}

.project-card__meta {
	font-size: 0.8rem;
	font-weight: 700;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: var(--color-accent);
	margin-bottom: var(--space-2);
}

.project-card h3 {
	margin: 0 0 var(--space-3);
	font-size: 1.2rem;
}

.project-card p {
	margin: 0 0 var(--space-4);
	color: var(--color-muted);
	flex: 1;
}

.project-card__cta {
	font-weight: 600;
	color: var(--color-accent);
}

/* Resume */
.resume-panel {
	display: grid;
	gap: var(--space-5);
}

@media (min-width: 900px) {
	.resume-panel {
		grid-template-columns: 1fr 320px;
		align-items: start;
	}
}

.pdf-frame {
	width: 100%;
	min-height: 720px;
	border: 1px solid var(--color-border);
	border-radius: var(--radius-md);
	background: #fff;
}

.resume-aside {
	position: sticky;
	top: calc(var(--header-h) + var(--space-4));
}

.resume-aside .btn {
	width: 100%;
	margin-bottom: var(--space-3);
}

.note {
	font-size: 0.95rem;
	color: var(--color-muted);
	margin: 0;
}

/* Project detail */
.page-hero {
	padding: var(--space-8) 0 var(--space-6);
	border-bottom: 1px solid var(--color-border);
	background: linear-gradient(
		180deg,
		color-mix(in srgb, var(--color-surface) 70%, transparent),
		transparent
	);
}

.page-hero h1 {
	font-family: var(--font-serif);
	font-size: clamp(1.85rem, 3vw, 2.5rem);
	margin: 0 0 var(--space-3);
}

.page-hero .lede {
	margin-bottom: var(--space-4);
}

.tag-row {
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-2);
	margin-bottom: var(--space-4);
}

.tag {
	font-size: 0.8rem;
	font-weight: 600;
	padding: 0.25rem 0.6rem;
	border-radius: 999px;
	background: var(--color-accent-soft);
	color: #1f4d44;
	border: 1px solid color-mix(in srgb, var(--color-accent) 25%, transparent);
}

.content-block {
	max-width: 48rem;
}

.content-block h2 {
	font-family: var(--font-serif);
	font-size: 1.35rem;
	margin-top: var(--space-6);
	margin-bottom: var(--space-3);
}

.content-block h2:first-child {
	margin-top: 0;
}

.content-block ul {
	padding-left: 1.2rem;
	color: var(--color-muted);
}

.content-block li + li {
	margin-top: var(--space-2);
}

.divider {
	height: 1px;
	background: var(--color-border);
	margin: var(--space-8) 0;
}

/* Footer */
.site-footer {
	border-top: 1px solid var(--color-border);
	background: color-mix(in srgb, var(--color-surface) 88%, transparent);
	margin-top: var(--space-10);
}

.site-footer__inner {
	width: min(100% - var(--space-6), var(--content-max));
	margin-inline: auto;
	padding: var(--space-5) 0;
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-4);
	align-items: center;
	justify-content: space-between;
}

.site-footer__copy {
	margin: 0;
	color: var(--color-muted);
	font-size: 0.95rem;
}

.site-footer__links {
	list-style: none;
	margin: 0;
	padding: 0;
	display: flex;
	gap: var(--space-4);
}

.site-footer__links a {
	font-weight: 600;
}