:root {
	--ink: #172420;
	--ink-soft: #3d4a41;
	--paper: #eef1ea;
	--paper-raised: #e3e7dc;
	--accent: #2f6f6a;
	--accent-soft: #dfe9e6;
	--ochre: #a97a34;
	--line: #c7cdbd;
	--line-strong: #a9b19c;
	--danger: #a8412f;
	--font-display: Georgia, "Iowan Old Style", "Palatino Linotype", "Book Antiqua", serif;
	--font-body: -apple-system, "Segoe UI", ui-sans-serif, system-ui, sans-serif;
	--font-mono: ui-monospace, "SF Mono", "Cascadia Code", "Roboto Mono", monospace;
}
@media (prefers-color-scheme: dark) {
	:root {
		--ink: #e9ede2;
		--ink-soft: #b6bfae;
		--paper: #121815;
		--paper-raised: #1a221d;
		--accent: #5fa39c;
		--accent-soft: #1d2b28;
		--ochre: #d1a25c;
		--line: #2c352d;
		--line-strong: #414d3f;
		--danger: #d97362;
	}
}
:root[data-theme="dark"] {
	--ink: #e9ede2;
	--ink-soft: #b6bfae;
	--paper: #121815;
	--paper-raised: #1a221d;
	--accent: #5fa39c;
	--accent-soft: #1d2b28;
	--ochre: #d1a25c;
	--line: #2c352d;
	--line-strong: #414d3f;
	--danger: #d97362;
}
:root[data-theme="light"] {
	--ink: #172420;
	--ink-soft: #3d4a41;
	--paper: #eef1ea;
	--paper-raised: #e3e7dc;
	--accent: #2f6f6a;
	--accent-soft: #dfe9e6;
	--ochre: #a97a34;
	--line: #c7cdbd;
	--line-strong: #a9b19c;
	--danger: #a8412f;
}

* { box-sizing: border-box; }

html, body {
	margin: 0;
	background: var(--paper);
	color: var(--ink);
	font-family: var(--font-body);
	line-height: 1.55;
}

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

.wrap {
	max-width: 860px;
	margin: 0 auto;
	padding: 0 28px;
}

.label {
	font-family: var(--font-mono);
	font-size: 0.72rem;
	letter-spacing: 0.11em;
	text-transform: uppercase;
	color: var(--ink-soft);
}

/* nav */
nav.top {
	position: sticky;
	top: 0;
	z-index: 10;
	background: var(--paper);
	border-bottom: 1px solid var(--line);
}
nav.top .wrap {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding-top: 22px;
	padding-bottom: 22px;
}
nav.top .mark {
	font-family: var(--font-display);
	font-size: 1.05rem;
	font-style: italic;
	color: var(--ink);
	text-decoration: none;
}
nav.top ul {
	list-style: none;
	display: flex;
	gap: 26px;
	margin: 0;
	padding: 0;
	font-family: var(--font-mono);
	font-size: 0.78rem;
	letter-spacing: 0.04em;
}
nav.top a {
	color: var(--ink-soft);
	text-decoration: none;
}
nav.top a.current { color: var(--ink); border-bottom: 1px solid var(--accent); padding-bottom: 3px; }
nav.top a:hover { color: var(--ink); }
.ext { font-size: 1em; opacity: 0.7; }

.nav-right {
	display: flex;
	align-items: center;
	gap: 22px;
}
.theme-toggle {
	display: flex;
	align-items: center;
	justify-content: center;
	width: 30px;
	height: 30px;
	padding: 0;
	background: none;
	border: 1px solid var(--line);
	border-radius: 50%;
	color: var(--ink-soft);
	cursor: pointer;
}
.theme-toggle:hover { color: var(--ink); border-color: var(--line-strong); }
.theme-toggle .icon-moon { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: block; }
@media (prefers-color-scheme: dark) {
	:root:not([data-theme="light"]) .theme-toggle .icon-sun { display: none; }
	:root:not([data-theme="light"]) .theme-toggle .icon-moon { display: block; }
}

/* hero */
header.hero { padding: 76px 0 56px; }
header.hero .wrap {
	display: grid;
	grid-template-columns: 1fr 180px;
	gap: 40px;
	align-items: start;
}
header.hero .hero-tags { grid-column: 1 / -1; margin-top: 32px; justify-content: center; }
header.hero .label { color: var(--accent); }
header.hero h1 {
	font-family: var(--font-display);
	font-size: clamp(2.6rem, 5vw, 3.6rem);
	line-height: 1.05;
	margin: 14px 0 20px;
	text-wrap: balance;
	font-weight: 400;
}
header.hero p.intro {
	font-size: 1.15rem;
	color: var(--ink-soft);
	max-width: 56ch;
	margin: 0 0 30px;
}
.links-row {
	display: flex;
	gap: 22px;
	font-family: var(--font-mono);
	font-size: 0.82rem;
}
.links-row a {
	text-decoration: none;
	border-bottom: 1px solid var(--line-strong);
	padding-bottom: 2px;
}
.links-row a:hover { border-color: var(--accent); color: var(--accent); }

.headshot { width: 180px; height: 180px; border-radius: 50%; object-fit: cover; object-position: center top; display: block; }

.contour { display: block; width: 100%; height: 46px; margin: 8px 0 0; }

/* about */
section.about { padding: 50px 0 60px; border-top: 1px solid var(--line); }
section.about p {
	font-size: 1.04rem;
	max-width: 62ch;
	color: var(--ink-soft);
	margin: 0 0 16px;
}
section.about p:last-child { margin-bottom: 0; }

.section-head {
	display: flex;
	align-items: baseline;
	gap: 14px;
	margin-bottom: 28px;
}
.section-head h2 {
	font-family: var(--font-display);
	font-weight: 400;
	font-size: 1.5rem;
	margin: 0;
}
.section-head .rule {
	flex: 1;
	height: 1px;
	background: var(--line);
}

/* projects */
section.projects { padding: 20px 0 64px; }
.project-grid {
	display: grid;
	grid-template-columns: 1fr;
	gap: 18px;
}
.card {
	border: 1px solid var(--line);
	background: var(--paper-raised);
	padding: 22px 22px 24px;
}
.card .label { color: var(--ochre); }
.card-meta {
	display: flex;
	align-items: baseline;
	justify-content: space-between;
	gap: 12px;
	margin-bottom: 10px;
}
.card .year {
	font-family: var(--font-mono);
	font-size: 0.72rem;
	color: var(--ink-soft);
	white-space: nowrap;
}
.card h3 {
	font-family: var(--font-display);
	font-weight: 400;
	font-size: 1.22rem;
	margin: 0 0 10px;
	text-wrap: balance;
}
.card p {
	color: var(--ink-soft);
	font-size: 0.96rem;
	margin: 0 0 16px;
}
.card .view {
	font-family: var(--font-mono);
	font-size: 0.78rem;
	color: var(--accent);
	text-decoration: none;
}
.card .view:hover { text-decoration: underline; }

/* contact */
section.contact { border-top: 1px solid var(--line-strong); padding: 44px 0 60px; }
section.contact h2 {
	font-family: var(--font-display);
	font-weight: 400;
	font-size: 1.7rem;
	margin: 0 0 12px;
}
section.contact > .wrap > p { color: var(--ink-soft); margin: 0 0 22px; max-width: 50ch; }
.expertise-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 28px; }
.expertise-tags span {
	font-family: var(--font-mono);
	font-size: 0.7rem;
	letter-spacing: 0.03em;
	background: var(--accent-soft);
	color: var(--ink);
	padding: 5px 10px;
}
form.contact-form {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 16px;
	max-width: 560px;
}
form.contact-form .full { grid-column: 1 / -1; }
form.contact-form label {
	display: block;
	font-family: var(--font-mono);
	font-size: 0.68rem;
	letter-spacing: 0.06em;
	text-transform: uppercase;
	color: var(--ink-soft);
	margin-bottom: 6px;
}
form.contact-form input,
form.contact-form textarea {
	width: 100%;
	background: var(--paper-raised);
	border: 1px solid var(--line-strong);
	color: var(--ink);
	font-family: var(--font-body);
	font-size: 0.95rem;
	padding: 10px 12px;
}
form.contact-form input:focus,
form.contact-form textarea:focus {
	outline: 2px solid var(--accent);
	outline-offset: 1px;
}
form.contact-form textarea { resize: vertical; min-height: 100px; }
form.contact-form button {
	justify-self: start;
	background: var(--accent);
	color: var(--paper);
	border: none;
	font-family: var(--font-mono);
	font-size: 0.8rem;
	letter-spacing: 0.04em;
	padding: 11px 22px;
	cursor: pointer;
}
form.contact-form button:hover { opacity: 0.88; }
.form-error {
	margin: 12px 0 0;
	font-family: var(--font-mono);
	font-size: 0.78rem;
	color: var(--danger);
}

/* field notes gallery page */
header.page-head { padding: 56px 0 10px; }
header.page-head h1 {
	font-family: var(--font-display);
	font-weight: 400;
	font-size: clamp(2.1rem, 4vw, 2.6rem);
	margin: 12px 0 14px;
	text-wrap: balance;
}
header.page-head p {
	color: var(--ink-soft);
	max-width: 60ch;
	margin: 0;
}
section.gallery { padding: 34px 0 90px; }
.gallery-grid {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 14px;
}
.gallery-grid figure { margin: 0; aspect-ratio: 1 / 1; }
.gallery-grid figure img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
}
.gallery-grid img[src*="03-delta-fieldwork"] { object-position: 85% center; }
.gallery-grid figcaption {
	margin-top: 8px;
	font-family: var(--font-mono);
	font-size: 0.68rem;
	color: var(--ink-soft);
}

/* project detail page */
section.project-detail { padding: 34px 0 90px; }
section.project-detail figure { margin: 0 0 40px; text-align: center; }
section.project-detail figure img {
	width: 100%;
	max-width: 560px;
	height: auto;
	display: block;
	margin: 0 auto;
	border: 1px solid var(--line);
}
section.project-detail figcaption {
	margin-top: 8px;
	font-family: var(--font-mono);
	font-size: 0.72rem;
	color: var(--ink-soft);
}
section.project-detail p { color: var(--ink-soft); max-width: 62ch; margin: 0 0 16px; }
.back-link {
	display: inline-block;
	margin-top: 8px;
	font-family: var(--font-mono);
	font-size: 0.78rem;
	color: var(--accent);
	text-decoration: none;
}
.back-link:hover { text-decoration: underline; }

/* site footer */
footer.site-footer {
	border-top: 1px solid var(--line-strong);
	padding: 48px 0 40px;
}
footer.site-footer .meta {
	font-family: var(--font-mono);
	font-size: 0.72rem;
	color: var(--ink-soft);
	letter-spacing: 0.03em;
}

@media (max-width: 620px) {
	nav.top .wrap { flex-direction: column; align-items: flex-start; gap: 12px; padding-top: 18px; padding-bottom: 18px; }
	nav.top ul { flex-wrap: wrap; gap: 14px; }
	header.hero { padding: 52px 0 40px; }
	header.hero .wrap { grid-template-columns: 1fr; }
	.headshot { width: 120px; height: 120px; }
	form.contact-form { grid-template-columns: 1fr; }
	.gallery-grid { gap: 8px; }
}