:root {
--primary-color: #2c5282;
--secondary-color: #4a5568;
--bg-color: #ffffff;
--text-color: #2d3748;
--accent-color: #e2e8f0;
}

* {
margin: 0;
padding: 0;
box-sizing: border-box;
}

body {
font-family: "Helvetica Neue", Arial, sans-serif;
line-height: 1.6;
color: var(--text-color);
background-color: var(--bg-color);
}

.nav {
background-color: white;
padding: 1rem 0;
position: fixed;
width: 100%;
top: 0;
z-index: 1000;
box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.nav-content {
max-width: 1200px;
margin: 0 auto;
display: flex;
justify-content: space-between;
align-items: center;
padding: 0 2rem;
}

.nav-links a {
color: var(--text-color);
text-decoration: none;
margin-left: 2rem;
font-weight: 500;
}

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

.hero {
background-color: var(--accent-color);
padding: 8rem 2rem 4rem;
margin-top: 4rem;
}

.hero-content {
max-width: 1200px;
margin: 0 auto;
display: grid;
grid-template-columns: 1fr 1fr;
gap: 4rem;
align-items: center;
}

.hero-text h1 {
font-size: 2.5rem;
color: var(--primary-color);
margin-bottom: 1rem;
}

.hero-text p {
font-size: 1.2rem;
color: var(--secondary-color);
margin-bottom: 2rem;
}

.social-links {
display: flex;
gap: 1rem;
}

.social-links a {
color: var(--primary-color);
text-decoration: none;
font-size: 1.5rem;
}

.container {
max-width: 1200px;
margin: 0 auto;
padding: 4rem 2rem;
}

.section {
margin-bottom: 4rem;
}

h2 {
color: var(--primary-color);
font-size: 2rem;
margin-bottom: 2rem;
}

.research-grid {
display: grid;
grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
gap: 2rem;
}

.research-card {
background: white;
padding: 2rem;
border-radius: 8px;
box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
transition: transform 0.3s ease;
}

.research-card:hover {
transform: translateY(-5px);
}

.research-card h3 {
color: var(--primary-color);
margin-bottom: 1rem;
}

.experience-timeline {
position: relative;
padding-left: 2rem;
}

.timeline-item {
position: relative;
padding-bottom: 2rem;
padding-left: 1rem;
}

.timeline-item::before {
content: "";
position: absolute;
left: -2rem;
top: 0;
width: 1px;
height: 100%;
background-color: var(--primary-color);
}

.timeline-item::after {
content: "";
position: absolute;
left: -2.35rem;
top: 0.5rem;
width: 0.75rem;
height: 0.75rem;
border-radius: 50%;
background-color: var(--primary-color);
}

.contact-section {
background-color: var(--accent-color);
padding: 4rem 0;
text-align: center;
}

footer {
background-color: var(--primary-color);
color: white;
text-align: center;
padding: 2rem 0;
}

@media (max-width: 768px) {
.hero-content {
    grid-template-columns: 1fr;
    text-align: center;
}

.social-links {
    justify-content: center;
}

.nav-content {
    flex-direction: column;
    gap: 1rem;
}

.nav-links a {
    margin: 0 1rem;
}
}