/*
	Personal site refinements layered on top of HTML5 UP's Strata theme.
	Keep component styles here so the upstream theme remains easy to update.
*/

:root {
	--accent: #49bf9d;
	--accent-dark: #2f8f74;
	--accent-soft: rgba(73, 191, 157, 0.1);
	--ink: #343b40;
	--muted: #687178;
	--subtle: #899197;
	--line: #e6ebe9;
	--surface: #ffffff;
	--surface-soft: #f8fbfa;
	--card-radius: 0.65em;
	--card-shadow: 0 0.65em 1.8em rgba(38, 56, 50, 0.07);
}

html {
	scroll-behavior: smooth;
}

body,
input,
select,
textarea {
	color: var(--muted);
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
}

#main h1,
#main h2,
#main h3,
#main h4,
#main strong {
	color: var(--ink);
	font-weight: 600;
}

:where(a, button, input, select, textarea):focus-visible {
	outline: 3px solid rgba(73, 191, 157, 0.38);
	outline-offset: 3px;
}

/* Sidebar */

#header {
	background-color: #17201d;
	background-image:
		linear-gradient(145deg, rgba(18, 28, 25, 0.82), rgba(31, 24, 21, 0.72)),
		url("../../images/bg.PNG");
	background-position: center center !important;
	background-repeat: no-repeat;
	background-size: cover;
	padding-bottom: 6em;
	padding-top: 6em;
}

#header .inner {
	display: flex;
	flex-direction: column;
	align-items: flex-end;
}

#header .image.avatar {
	box-shadow: 0 0 0 0.3em rgba(255, 255, 255, 0.1), 0 0.75em 2em rgba(0, 0, 0, 0.22);
}

.sidebar-identity {
	display: flex;
	flex-direction: column;
	align-items: flex-end;
	gap: 0.3em;
	margin: 0;
}

.sidebar-identity strong {
	font-size: 1.12em;
	font-weight: 600;
	letter-spacing: 0.01em;
}

.sidebar-identity span {
	color: rgba(255, 255, 255, 0.68);
	display: block;
	font-size: 0.78em;
	line-height: 1.45;
}

.site-nav,
.site-nav ul {
	display: flex;
	flex-direction: column;
	align-items: flex-end;
	gap: 0.45em;
}

.site-nav {
	margin-top: 1.8em;
}

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

.site-nav a {
	border: 0;
	color: rgba(255, 255, 255, 0.62);
	font-size: 0.78em;
	letter-spacing: 0.035em;
	padding: 0.12em 0;
	position: relative;
}

.site-nav a::after {
	background: var(--accent);
	bottom: 0;
	content: "";
	height: 1px;
	position: absolute;
	right: 0;
	transform: scaleX(0);
	transform-origin: right;
	transition: transform 180ms ease;
	width: 100%;
}

.site-nav a:hover,
.site-nav a:focus-visible {
	color: #ffffff !important;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
	transform: scaleX(1);
}

/* Main layout and hero */

#main {
	padding-top: 6em;
}

#main > section {
	scroll-margin-top: 2em;
}

#about .major {
	margin-bottom: 1.35em;
}

.eyebrow,
.section-kicker {
	color: var(--accent-dark);
	font-size: 0.72em;
	font-weight: 600;
	letter-spacing: 0.14em;
	line-height: 1.4;
	margin: 0 0 0.7em;
	text-transform: uppercase;
}

.hero-title {
	font-size: clamp(2em, 3.2vw, 2.7em);
	letter-spacing: -0.025em;
	line-height: 1.12;
	margin-bottom: 0.35em;
}

.hero-role {
	color: #555f65;
	font-size: 1.08em;
	font-weight: 400;
	line-height: 1.5;
	margin-bottom: 1.15em;
}

.intro-copy {
	font-size: 1.04em;
	line-height: 1.82;
	max-width: 48em;
}

.hero-actions,
.hero-actions ul {
	display: flex;
	flex-wrap: wrap;
	gap: 0.75em;
	list-style: none;
	margin: 0;
	padding: 0;
}

.hero-actions li {
	padding: 0;
}

.hero-actions .button.primary {
	box-shadow: 0 0.45em 1.1em rgba(73, 191, 157, 0.18);
}

.button.primary {
	background: var(--accent);
	border-color: var(--accent);
	color: #ffffff !important;
}

.button.primary:hover,
.button.primary:focus-visible {
	background: var(--accent-dark);
	border-color: var(--accent-dark);
}

/* Section headings */

.section-heading {
	margin-bottom: 1.8em;
}

.section-heading h2,
h2.section-heading {
	font-size: 1.6em;
	letter-spacing: -0.015em;
	line-height: 1.25;
	margin-bottom: 0.3em;
}

.section-heading > :last-child {
	margin-bottom: 0;
}

.section-heading.has-action {
	display: flex;
	align-items: flex-end;
	justify-content: space-between;
	gap: 1.5em;
}

.section-heading.has-action > div > :last-child {
	margin-bottom: 0;
}

.repository-link {
	display: inline-flex;
	align-items: center;
	flex-shrink: 0;
	gap: 0.35em;
	background: #ffffff;
	border: 1px solid var(--line);
	border-radius: 999px;
	color: var(--accent-dark);
	font-size: 0.82em;
	font-weight: 600;
	padding: 0.55em 0.9em;
	text-decoration: none;
	transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease;
}

.repository-link > span {
	display: inline-block;
	transition: transform 180ms ease;
}

.repository-link:hover,
.repository-link:focus-visible {
	background: var(--accent-soft);
	border-color: rgba(73, 191, 157, 0.45);
	color: var(--accent-dark) !important;
}

.repository-link:hover > span,
.repository-link:focus-visible > span {
	transform: translate(0.12em, -0.12em);
}

/* Shared cards */

.content-card {
	background: var(--surface);
	border: 1px solid var(--line);
	border-radius: var(--card-radius);
	box-shadow: 0 0.25em 0.9em rgba(38, 56, 50, 0.035);
	height: 100%;
	padding: 1.5em;
	transition: border-color 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}

.content-card > :last-child {
	margin-bottom: 0;
}

.content-card h3 {
	font-size: 1.08em;
	line-height: 1.42;
	margin-bottom: 0.55em;
}

.content-card h3 a {
	border-bottom: 0;
}

.content-card p {
	line-height: 1.65;
}

.publication-card {
	background: linear-gradient(135deg, var(--surface-soft), var(--surface));
	border-left: 0.25em solid var(--accent);
	padding-left: 1.65em;
}

.publication-card h3 {
	font-size: 1.24em;
}

.card-meta,
.term-links,
.card-links {
	display: flex;
	align-items: center;
	flex-wrap: wrap;
	gap: 0.55em;
}

.card-meta {
	color: var(--subtle);
	font-size: 0.8em;
	letter-spacing: 0.025em;
	margin-bottom: 0.8em;
}

.meta-pill,
.project-tag,
.term-chip {
	display: inline-flex;
	align-items: center;
	border-radius: 999px;
	font-size: 0.78em;
	font-weight: 600;
	line-height: 1.35;
}

.meta-pill,
.project-tag {
	background: var(--accent-soft);
	color: var(--accent-dark);
	padding: 0.34em 0.72em;
}

.publication-authors {
	color: #737d83;
	font-size: 0.92em;
	margin-bottom: 1em;
}

.text-link,
.card-links a,
.teaching-resource a {
	border-bottom: 0;
	color: var(--accent-dark);
	font-weight: 600;
	text-decoration: none;
}

.text-link {
	display: inline-flex;
	align-items: center;
	gap: 0.35em;
}

.text-link > span,
.card-links a > span,
.term-chip > span {
	display: inline-block;
	transition: transform 180ms ease;
}

.text-link:hover > span,
.text-link:focus-visible > span,
.card-links a:hover > span,
.card-links a:focus-visible > span,
.term-chip:hover > span,
.term-chip:focus-visible > span {
	transform: translate(0.12em, -0.12em);
}

/* Experience */

.experience-list {
	display: grid;
	gap: 2em;
}

.experience-item {
	display: grid;
	grid-template-columns: minmax(10em, 0.42fr) minmax(0, 1fr);
	align-items: start;
	gap: 2em;
}

.experience-status {
	color: var(--accent-dark);
	font-size: 0.68em;
	font-weight: 600;
	letter-spacing: 0.08em;
	margin-bottom: 0.4em;
	text-transform: uppercase;
}

.experience-company h3,
.experience-details h3 {
	font-size: 1.05em;
	line-height: 1.45;
	margin-bottom: 0.5em;
}

.experience-details p {
	line-height: 1.65;
	margin-bottom: 0.65em;
}

.project-list {
	display: grid;
	gap: 2.15em;
}

.project-row {
	display: grid;
	grid-template-columns: minmax(13em, 0.9fr) minmax(0, 1.25fr) auto;
	align-items: center;
	gap: 1.5em;
	padding: 0;
}

.project-title {
	min-width: 0;
}

.project-row h3 {
	font-size: 1.05em;
	line-height: 1.45;
	margin: 0;
}

.project-row h3 a {
	border-bottom: 0;
}

.project-summary {
	line-height: 1.65;
	margin: 0;
}

.project-tag {
	align-self: flex-start;
	font-size: 0.68em;
	letter-spacing: 0.08em;
	margin-bottom: 0.9em;
	text-transform: uppercase;
}

.project-row .project-tag {
	background: transparent;
	border-radius: 0;
	margin: 0 0 0.4em;
	padding: 0;
}

.card-links {
	font-size: 0.88em;
	margin-top: auto;
	padding-top: 1.1em;
}

.project-row .card-links {
	justify-content: flex-end;
	margin: 0;
	padding: 0;
	white-space: nowrap;
}

.card-links a {
	border-bottom: 1px solid rgba(47, 143, 116, 0.24);
}

.card-links a:hover,
.card-links a:focus-visible,
.teaching-resource a:hover,
.teaching-resource a:focus-visible {
	border-bottom-color: var(--accent);
	color: var(--accent) !important;
}

/* Open-source contribution details */

.contribution-list {
	list-style: none;
	margin: 1em 0 0;
	padding: 0;
}

.contribution-item {
	border-top: 1px solid var(--line);
	line-height: 1.62;
	padding: 1em 0 0 1.45em;
	position: relative;
}

.contribution-item + .contribution-item {
	margin-top: 1em;
}

.contribution-item::before {
	background: var(--accent);
	border-radius: 50%;
	content: "";
	height: 0.42em;
	left: 0.15em;
	position: absolute;
	top: 1.65em;
	width: 0.42em;
}

/* Teaching */

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

.teaching-item {
	display: grid;
	grid-template-columns: minmax(0, 1fr) auto;
	align-items: center;
	gap: 1.2em;
	border-bottom: 1px solid var(--line);
	padding: 1.2em 0;
}

.teaching-item:first-child {
	padding-top: 0;
}

.teaching-item:last-child {
	border-bottom: 0;
	padding-bottom: 0;
}

.course-code {
	color: var(--accent-dark);
	font-size: 0.88em;
	font-weight: 600;
	letter-spacing: 0.035em;
	margin: 0;
}

.teaching-details {
	display: flex;
	flex-direction: column;
	gap: 0.15em;
	line-height: 1.5;
	min-width: 0;
}

.teaching-details strong {
	font-size: 0.98em;
}

.teaching-details span {
	color: var(--subtle);
	font-size: 0.84em;
}

.teaching-details h3 {
	margin: 0;
}

.term-links {
	justify-content: flex-end;
}

.term-chip {
	background: #f1f5f4;
	border: 1px solid #e0e7e5;
	color: #5e696e;
	padding: 0.42em 0.75em;
	white-space: nowrap;
}

a.term-chip:hover,
a.term-chip:focus-visible {
	background: var(--accent-soft);
	border-color: rgba(73, 191, 157, 0.45);
	color: var(--accent-dark) !important;
}

.teaching-resource {
	color: var(--subtle);
	font-size: 0.82em;
	margin: 0.35em 0 0;
}

/* Contact and message form */

.contact-grid {
	display: grid;
	grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
	align-items: start;
	gap: 3em;
}

.contact-copy p {
	line-height: 1.7;
}

.contact-email {
	overflow-wrap: anywhere;
}

.message-form {
	display: grid;
	gap: 1em;
	margin: 0;
	max-width: 44em;
	width: 100%;
}

.form-row {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 1em;
}

.message-form label {
	font-size: 0.82em;
	font-weight: 600;
	margin-bottom: 0.45em;
}

.message-form input[type="text"],
.message-form input[type="email"],
.message-form textarea {
	background: #fbfcfc;
	border: 1px solid #dfe6e3;
	border-radius: 0.5em;
	color: var(--ink);
	font-size: 0.92em;
	padding: 0.78em 0.95em;
	transition: background-color 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
	width: 100%;
}

.message-form input[type="text"],
.message-form input[type="email"] {
	min-height: 3.15em;
}

.message-form textarea {
	line-height: 1.6;
	min-height: 10em;
	resize: vertical;
}

.message-form input::placeholder,
.message-form textarea::placeholder {
	color: #929a9f !important;
}

.message-form input[type="text"]:focus,
.message-form input[type="email"]:focus,
.message-form textarea:focus {
	background: #ffffff;
	border-color: var(--accent);
	box-shadow: 0 0 0 3px rgba(73, 191, 157, 0.12);
}

.message-form .button {
	align-self: start;
	justify-self: start;
	margin: 0;
}

.message-form .button.primary {
	box-shadow: 0 0.45em 1.1em rgba(73, 191, 157, 0.18);
}

.message-form .button:disabled {
	cursor: wait;
	opacity: 0.68;
}

.form-status {
	border-radius: 0.45em;
	font-size: 0.86em;
	line-height: 1.5;
	margin: 0;
	min-height: 1.5em;
}

.form-status:not(:empty) {
	padding: 0.7em 0.9em;
}

.form-status.is-success,
.is-success.form-status {
	background: rgba(73, 191, 157, 0.1);
	color: #287b64;
}

.form-status.is-error,
.is-error.form-status {
	background: rgba(192, 70, 70, 0.08);
	color: #a23f3f;
}

@media (hover: hover) {
	.content-card:not(.contact-card):hover {
		border-color: rgba(73, 191, 157, 0.42);
		box-shadow: var(--card-shadow);
		transform: translateY(-2px);
	}
}

@media screen and (max-width: 1200px) {
	.project-row {
		grid-template-columns: minmax(12em, 0.8fr) minmax(0, 1.2fr);
	}

	.project-row .card-links {
		grid-column: 2;
		justify-content: flex-start;
	}
}

/* Medium: Strata moves the sidebar above the page at this breakpoint. */

@media screen and (max-width: 980px) {
	#header {
		background-position: center center !important;
		padding-bottom: 4.25em;
		padding-top: 4.25em;
	}

	#header .inner,
	.sidebar-identity {
		align-items: center;
	}

	.site-nav,
	.site-nav ul {
		flex-direction: row;
		align-items: center;
		justify-content: center;
		flex-wrap: wrap;
	}

	.site-nav a::after {
		left: 0;
		right: auto;
		transform-origin: center;
	}

	#main {
		padding-top: 4.5em;
	}

	#footer {
		background-color: #17201d;
		background-image:
			linear-gradient(145deg, rgba(18, 28, 25, 0.88), rgba(31, 24, 21, 0.78)),
			url("../../images/bg.PNG");
		background-position: center center;
		background-repeat: no-repeat;
		background-size: cover;
	}

	.contact-grid {
		gap: 2em;
	}
}

/* Small: content cards and forms become a single, comfortable column. */

@media screen and (max-width: 736px) {
	#header {
		padding: 3.25em 1.5em;
	}

	#header .image.avatar {
		width: 5.75em;
	}

	#main {
		padding: 3em 1.5em 0.5em;
	}

	#main > section {
		margin-top: 2.75em;
		padding-top: 2.75em;
	}

	.hero-title {
		font-size: clamp(1.85em, 8vw, 2.25em);
	}

	.intro-copy {
		font-size: 1em;
	}

	.contact-grid,
	.form-row {
		grid-template-columns: 1fr;
	}

	.section-heading.has-action {
		align-items: flex-start;
		flex-direction: column;
		gap: 0.9em;
	}

	.project-row {
		grid-template-columns: 1fr;
		gap: 0.65em;
		padding: 0;
	}

	.project-list {
		gap: 1.85em;
	}

	.experience-item {
		grid-template-columns: 1fr;
		gap: 0.45em;
	}

	.experience-list {
		gap: 1.85em;
	}

	.project-row .card-links {
		grid-column: auto;
		justify-content: flex-start;
	}

	.contact-grid {
		gap: 1.5em;
	}

	.teaching-item {
		grid-template-columns: 1fr;
		gap: 0.55em;
	}

	.term-links {
		justify-content: flex-start;
	}

	.hero-actions,
	.hero-actions ul {
		align-items: stretch;
		flex-direction: column;
	}

	.hero-actions li,
	.hero-actions .button,
	.hero-actions li .button,
	.message-form .button {
		width: 100%;
	}

	.content-card {
		padding: 1.3em;
	}
}

@media screen and (max-width: 480px) {
	#header {
		padding: 2.75em 1.25em;
	}

	#header .image.avatar {
		width: 5.15em;
	}

	.sidebar-identity strong {
		font-size: 1em;
	}

	.sidebar-identity span {
		font-size: 0.72em;
	}

	.site-nav {
		margin-top: 1.35em;
	}

	.site-nav,
	.site-nav ul {
		gap: 0.35em 0.8em;
	}

	.site-nav a {
		font-size: 0.72em;
	}

	#main {
		padding: 2.5em 1.25em 0.25em;
	}

	#main > section {
		margin-top: 2.4em;
		padding-top: 2.4em;
	}

	.section-heading {
		margin-bottom: 1.4em;
	}

	.content-card {
		border-radius: 0.55em;
		padding: 1.15em;
	}

	.publication-card {
		padding-left: 1.25em;
	}

	.card-meta,
	.term-links,
	.card-links {
		gap: 0.45em;
	}
}

@media (prefers-reduced-motion: reduce) {
	html {
		scroll-behavior: auto;
	}

	.content-card,
	.site-nav a::after,
	.text-link > span,
	.card-links a > span,
	.term-chip > span,
	.repository-link,
	.repository-link > span,
	.message-form input,
	.message-form textarea {
		transition: none;
	}
}