:root {
	--primary: #1b3a4b;
	--secondary: #507d8c;
	--accent: #c48f65;
	--light: #f7f9fa;
	--dark: #2d2d2d;
	--white: #ffffff;
}

html {
	scroll-behavior: smooth;
}

* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
	font-family: 'Plus Jakarta Sans', sans-serif;
}

body {
	background-color: var(--light);
	color: var(--dark);
	line-height: 1.7;
	font-weight: 300;
}

.container {
	max-width: 1200px;
	margin: 0 auto;
	padding: 0 20px;
	scroll-margin-top: 100px;
}

header {
	background-color: rgba(255, 255, 255, 0.95);
	box-shadow: 0 2px 15px rgba(0, 0, 0, 0.05);
	position: fixed;
	width: 100%;
	top: 0;
	z-index: 100;
	backdrop-filter: blur(10px);
}

.navbar {
	display: flex;
	justify-content: space-between;
	align-items: center;
	padding: 20px 0;
}

.logo {
	font-size: 22px;
	font-weight: 500;
	color: var(--primary);
	text-decoration: none;
}

.nav-links {
	display: flex;
	list-style: none;
}

.nav-links li {
	margin-left: 35px;
}

.nav-links a {
	text-decoration: none;
	color: var(--dark);
	font-weight: 400;
	transition: color 0.3s, transform 0.3s;
	position: relative;
	font-size: 15px;
}

.nav-links a:after {
	content: '';
	position: absolute;
	width: 0;
	height: 2px;
	background: var(--accent);
	left: 0;
	bottom: -5px;
	transition: width 0.3s;
}

.nav-links a:hover {
	color: var(--accent);
}

.nav-links a:hover:after {
	width: 100%;
}

.hero {
	padding: 180px 0 120px;
	background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
	color: white;
	text-align: center;
}

.hero-content {
	max-width: 800px;
	margin: 0 auto;
}

.hero h1 {
	font-size: 3.5rem;
	margin-bottom: 20px;
	font-weight: 600;
}

.hero p {
	font-size: 1.2rem;
	margin-bottom: 35px;
	opacity: 0.9;
	font-weight: 300;
	color: rgba(255, 255, 255, 0.8);
}

.btn {
	display: inline-block;
	background-color: var(--accent);
	color: white;
	padding: 14px 34px;
	border-radius: 50px;
	text-decoration: none;
	font-weight: 500;
	font-size: 15px;
	transition: transform 0.3s, box-shadow 0.3s;
}

.btn:hover {
	transform: translateY(-3px);
	box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

section {
	padding: 80px 0;
}

.section-title {
	font-size: 2.2rem;
	margin-bottom: 25px;
	color: var(--primary);
	font-weight: 600;
	position: relative;
	display: inline-block;
	margin-bottom: 50px;
}

.section-title:after {
	content: '';
	position: absolute;
	width: 60px;
	height: 3px;
	background: var(--accent);
	left: 0;
	bottom: -10px;
}

.center-title {
	text-align: center;
	margin-left: 50%;
	transform: translateX(-50%);
}

.center-title:after {
	left: 50%;
	transform: translateX(-50%);
}

.two-columns {
	display: flex;
	gap: 50px;
	margin-bottom: 60px;
}

.profile-img {
	flex: 1;
	max-width: 400px;
}

.profile-img img {
	width: 100%;
	height: auto;
	border-radius: 12px;
	box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.profile-content {
	flex: 1;
}

.education-item {
	margin-bottom: 20px;
	position: relative;
	padding-left: 25px;
}

.education-item:before {
	content: '';
	position: absolute;
	width: 8px;
	height: 8px;
	background: var(--accent);
	border-radius: 50%;
	left: 0;
	top: 12px;
}

.education-item h4 {
	font-weight: 500;
	color: var(--primary);
	margin-bottom: 5px;
}

.education-item p {
	color: var(--dark);
	opacity: 0.8;
}

.metrics {
	display: flex;
	flex-wrap: wrap;
	gap: 20px;
	margin-top: 40px;
	margin-bottom: 30px;
}

.metric-item {
	background-color: white;
	padding: 15px 20px;
	border-radius: 10px;
	box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
	min-width: 120px;
	text-align: center;
}

.metric-item h4 {
	color: var(--accent);
	font-size: 30px;
	font-weight: 600;
	margin-bottom: 5px;
}

.metric-item p {
	color: var(--dark);
	font-size: 14px;
	font-weight: 400;
}

.research-areas {
	margin-top: 40px;
}

.research-tag {
	display: inline-block;
	background-color: rgba(80, 125, 140, 0.1);
	color: var(--primary);
	padding: 5px 15px;
	border-radius: 20px;
	margin-right: 10px;
	margin-bottom: 10px;
	font-size: 14px;
	font-weight: 500;
}

.services-grid {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 25px;
	margin-bottom: 60px;
}

.service-card {
	background-color: white;
	border-radius: 12px;
	overflow: hidden;
	box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
	transition: transform 0.3s, box-shadow 0.3s;
	padding: 30px;
}

.service-card:hover {
	transform: translateY(-8px);
	box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.service-card h3 {
	font-size: 1.3rem;
	margin-bottom: 15px;
	color: var(--primary);
	font-weight: 500;
}

.pub-list {
	margin-bottom: 40px;
}

.pub-item {
	position: relative;
	padding-left: 20px;
	margin-bottom: 25px;
	border-left: 3px solid var(--accent);
	padding-left: 20px;
}

/* Featured Videos Section */
.videos-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
	gap: 30px;
	margin-bottom: 60px;
}

.video-card {
	background-color: white;
	border-radius: 12px;
	overflow: hidden;
	box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
	transition: transform 0.3s, box-shadow 0.3s;
}

.video-card:hover {
	transform: translateY(-8px);
	box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.video-wrapper {
	position: relative;
	width: 100%;
	height: 0;
	padding-bottom: 56.25%;
	/* 16:9 aspect ratio */
	background-color: #000;
}

.video-wrapper iframe {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	border: none;
}

.video-content {
	padding: 25px;
}

.video-card h3 {
	font-size: 1.2rem;
	margin-bottom: 12px;
	color: var(--primary);
	font-weight: 500;
	line-height: 1.4;
}

.video-card p {
	color: var(--dark);
	opacity: 0.8;
	font-size: 14px;
	line-height: 1.6;
}

.video-meta {
	display: flex;
	justify-content: space-between;
	align-items: center;
	margin-top: 15px;
	padding-top: 15px;
	border-top: 1px solid #e0e0e0;
	font-size: 13px;
	color: var(--dark);
	opacity: 0.7;
}

.contact-form {
	max-width: 600px;
	margin: 0 auto;
	background-color: white;
	padding: 40px;
	border-radius: 12px;
	box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.h-captcha {
	margin-bottom: 16px;
}

.form-group {
	margin-bottom: 20px;
}

.form-group label {
	display: block;
	margin-bottom: 8px;
	font-weight: 500;
	color: var(--dark);
	font-size: 15px;
}

.form-group input,
.form-group textarea {
	width: 100%;
	padding: 14px;
	border: 1px solid #e0e0e0;
	border-radius: 8px;
	font-size: 15px;
	font-family: 'Plus Jakarta Sans', sans-serif;
	transition: border-color 0.3s, box-shadow 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
	outline: none;
	border-color: var(--accent);
	box-shadow: 0 0 0 3px rgba(196, 143, 101, 0.15);
}

.form-group textarea {
	height: 150px;
	resize: vertical;
}

.form-submit {
	background-color: var(--accent);
	color: white;
	border: none;
	padding: 14px 34px;
	border-radius: 50px;
	font-size: 15px;
	font-weight: 500;
	cursor: pointer;
	transition: transform 0.3s, box-shadow 0.3s;
	letter-spacing: 0.5px;
	font-family: 'Plus Jakarta Sans', sans-serif;
}

.form-submit:hover {
	transform: translateY(-3px);
	box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.contact-info {
	display: flex;
	justify-content: space-between;
	flex-wrap: wrap;
	margin-top: 60px;
}

.contact-info-item {
	flex: 1;
	min-width: 200px;
	margin-bottom: 30px;
	text-align: center;
}

.contact-info-icon {
	color: var(--accent);
	font-size: 24px;
	margin-bottom: 15px;
}

.contact-info-item h4 {
	font-weight: 500;
	margin-bottom: 5px;
	color: var(--primary);
}

footer {
	background-color: var(--dark);
	color: white;
	padding: 30px 0;
	text-align: center;
	margin-top: 40px;
}

.social-links {
	display: flex;
	justify-content: center;
	gap: 15px;
	margin: 20px 0;
}

.social-links a {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 40px;
	height: 40px;
	background-color: rgba(255, 255, 255, 0.1);
	color: var(--white);
	border-radius: 50%;
	transition: all 0.3s;
}

.social-links a:hover {
	background-color: var(--accent);
	transform: translateY(-3px);
}

/* Responsive */
@media (max-width: 768px) {
	.navbar {
		flex-direction: column;
		padding: 15px 0;
	}

	.nav-links {
		margin-top: 15px;
	}

	.nav-links li {
		margin-left: 15px;
	}

	.hero {
		padding: 180px 0 80px;
	}

	.hero h1 {
		font-size: 2.3rem;
		line-height: 1.3;
	}

	.two-columns {
		flex-direction: column;
	}

	.profile-img {
		max-width: 100%;
		margin-bottom: 30px;
	}

	.services-grid {
		grid-template-columns: 1fr;
	}

	.videos-grid {
		grid-template-columns: 1fr;
	}

	.metrics {
		justify-content: center;
	}
}