:root {
	--bg: #f6f7fb;
	--card: rgba(255, 255, 255, 0.86);
	--card-border: rgba(17, 24, 39, 0.08);
	--text: #172033;
	--muted: #667085;
	--accent: #2563eb;
	--accent-dark: #1d4ed8;
	--avatar-border: #ffffff;
	--grid-line: rgba(15, 23, 42, 0.04);
	--pill: rgba(255, 255, 255, 0.6);
	--subcard: rgba(255, 255, 255, 0.62);
	--shadow: 0 24px 80px rgba(17, 24, 39, 0.13);
}

* {
	box-sizing: border-box;
}

body {
	margin: 0;
	min-height: 100vh;
	color: var(--text);
	background:
		radial-gradient(circle at top left, rgba(37, 99, 235, 0.18), transparent 34rem),
		radial-gradient(circle at bottom right, rgba(14, 165, 233, 0.16), transparent 32rem),
		var(--bg);
	font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
	line-height: 1.6;
}

body::before {
	position: fixed;
	inset: 0;
	z-index: -1;
	content: "";
	background-image: linear-gradient(var(--grid-line) 1px, transparent 1px),
		linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
	background-size: 44px 44px;
	mask-image: linear-gradient(to bottom, black, transparent 72%);
}

a {
	color: var(--accent);
	text-decoration: none;
	transition: color 160ms ease, transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

a:hover,
a:focus {
	color: var(--accent-dark);
}

.shell {
	width: min(960px, calc(100% - 32px));
	margin: 0 auto;
	padding: 56px 0;
}

.hero {
	display: grid;
	min-height: 100vh;
	place-items: center;
}

.hero-card,
.section-card,
.timeline-item {
	border: 1px solid var(--card-border);
	background: var(--card);
	box-shadow: var(--shadow);
	backdrop-filter: blur(18px);
}

.hero-card {
	width: min(760px, 100%);
	padding: clamp(32px, 7vw, 64px);
	border-radius: 36px;
	text-align: center;
}

.avatar {
	width: 168px;
	height: 168px;
	object-fit: cover;
	background: #08111f;
	border: 6px solid var(--avatar-border);
	border-radius: 999px;
	box-shadow: 0 18px 45px rgba(37, 99, 235, 0.24);
}

.eyebrow {
	margin: 24px 0 8px;
	color: var(--accent);
	font-size: 0.78rem;
	font-weight: 800;
	letter-spacing: 0.18em;
	text-transform: uppercase;
}

h1,
h2,
h3,
p {
	margin-top: 0;
}

h1 {
	margin-bottom: 12px;
	font-size: clamp(2.6rem, 9vw, 5.6rem);
	line-height: 0.95;
	letter-spacing: -0.07em;
}

h2 {
	margin-bottom: 8px;
	font-size: 1.35rem;
	letter-spacing: -0.03em;
}

.tagline,
.page-header p,
.short-info,
.timeline-item p,
.publication-list span,
.education-grid p {
	color: var(--muted);
}

.tagline {
	font-size: clamp(1.1rem, 3vw, 1.35rem);
}

.short-info {
	max-width: 560px;
	margin: 0 auto 16px;
}

.expertise-summary {
	max-width: 610px;
	margin: 0 auto 28px;
	color: var(--muted);
}

.cta-row {
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	gap: 12px;
	margin-bottom: 34px;
}

.card-grid {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 16px;
	margin: 34px 0;
}

.feature-card {
	display: flex;
	align-items: center;
	gap: 16px;
	padding: 18px;
	border: 1px solid var(--card-border);
	border-radius: 22px;
	background: var(--pill);
	color: var(--text);
	text-align: left;
}

.feature-card:hover,
.feature-card:focus {
	transform: translateY(-3px);
	border-color: rgba(37, 99, 235, 0.28);
	box-shadow: 0 18px 45px rgba(37, 99, 235, 0.14);
	color: var(--text);
}

.feature-icon {
	display: inline-grid;
	width: 52px;
	height: 52px;
	flex: 0 0 auto;
	place-items: center;
	border-radius: 16px;
	background: linear-gradient(135deg, var(--accent), #0ea5e9);
	color: #ffffff;
	font-weight: 800;
}

.feature-card strong,
.feature-card small {
	display: block;
}

.feature-card small {
	color: var(--muted);
}

.button,
.home-link {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	border: 1px solid rgba(37, 99, 235, 0.18);
	background: var(--pill);
	border-radius: 999px;
	font-weight: 700;
}

.button {
	padding: 10px 16px;
}

.button-primary {
	background: linear-gradient(135deg, var(--accent), #0ea5e9);
	color: #ffffff;
}

.button-primary:hover,
.button-primary:focus {
	color: #ffffff;
}

.button:hover,
.button:focus,
.home-link:hover,
.home-link:focus {
	border-color: rgba(37, 99, 235, 0.36);
	box-shadow: 0 12px 30px rgba(37, 99, 235, 0.12);
}

.page-header {
	margin-bottom: 28px;
	text-align: center;
}

.page-header h1 {
	margin: 22px 0 12px;
}

.page-header p {
	max-width: 680px;
	margin: 0 auto;
	font-size: 1.08rem;
}

.home-link {
	padding: 9px 16px;
}

.timeline {
	display: grid;
	gap: 14px;
}

.timeline-item {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 24px;
	padding: 24px;
	border-radius: 24px;
}

.timeline-item p {
	margin-bottom: 0;
}

.timeline-item a {
	white-space: nowrap;
	font-weight: 700;
}

.section-card {
	margin-top: 28px;
	padding: clamp(24px, 5vw, 40px);
	border-radius: 28px;
}

.education-grid {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 24px;
}

.education-grid article {
	padding: 22px;
	border: 1px solid var(--card-border);
	border-radius: 22px;
	background: var(--subcard);
}

.education-grid .eyebrow {
	margin-top: 0;
}

.education-grid a {
	display: block;
	margin-top: 10px;
}

.publication-list {
	display: grid;
	gap: 18px;
	margin: 18px 0 0;
	padding-left: 1.4rem;
}

.publication-list li {
	padding: 18px 20px;
	border: 1px solid var(--card-border);
	border-radius: 20px;
	background: var(--subcard);
}

.publication-list strong,
.publication-list span {
	display: block;
}

@media (max-width: 680px) {
	.shell {
		width: min(100% - 22px, 960px);
		padding: 32px 0;
	}

	.hero-card {
		padding: 28px 20px;
		border-radius: 28px;
	}

	.avatar {
		width: 132px;
		height: 132px;
	}

	.card-grid,
	.education-grid {
		grid-template-columns: 1fr;
	}

	.timeline-item {
		align-items: flex-start;
		flex-direction: column;
		gap: 10px;
	}

	.timeline-item a {
		white-space: normal;
	}
}

@media (prefers-color-scheme: dark) {
	:root {
		--bg: #020617;
		--card: rgba(15, 23, 42, 0.86);
		--card-border: rgba(148, 163, 184, 0.18);
		--text: #e5edf8;
		--muted: #a8b3c7;
		--accent: #60a5fa;
		--accent-dark: #93c5fd;
		--avatar-border: rgba(226, 232, 240, 0.92);
		--grid-line: rgba(148, 163, 184, 0.07);
		--pill: rgba(15, 23, 42, 0.7);
		--subcard: rgba(15, 23, 42, 0.64);
		--shadow: 0 24px 80px rgba(0, 0, 0, 0.34);
	}

	body {
		background:
			radial-gradient(circle at top left, rgba(37, 99, 235, 0.28), transparent 34rem),
			radial-gradient(circle at bottom right, rgba(14, 165, 233, 0.18), transparent 32rem),
			var(--bg);
	}
}