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

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: #333;
}

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

/* Header */
header {
    background: #2c5f2d;
    color: white;
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

nav h1 {
    font-size: 1.5rem;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

nav a {
    color: white;
    text-decoration: none;
    transition: color 0.3s;
}

nav a:hover {
    color: #97bc62;
}

/* Hero Section */
#hero {
    background: linear-gradient(135deg, #2c5f2d, #97bc62);
    color: white;
    padding: 150px 0 80px;
    text-align: center;
}

#hero h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

/* Sections */
section {
    padding: 60px 0;
}

section:nth-child(even) {
    background: #f8f9fa;
}

h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    text-align: center;
    color: #2c5f2d;
}

/* About Section */
.about-content {
    display: flex;
    gap: 3rem;
    align-items: center;
    max-width: 800px;
    margin: 0 auto;
}

.profile-img {
    flex: 1;
}

.profile-img img {
    width: 100%;
    max-width: 300px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.bio {
    flex: 2;
}

.bio h3 {
    color: #2c5f2d;
    margin-bottom: 0.5rem;
}

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

.research-item {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

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

.research-item h3 {
    color: #2c5f2d;
    margin-bottom: 1rem;
}

/* Publications */
.publication-list {
    max-width: 800px;
    margin: 0 auto;
}

.publication {
    background: white;
    padding: 1.5rem;
    margin-bottom: 1rem;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.publication h4 {
    color: #2c5f2d;
    margin-bottom: 0.5rem;
}

/* Contact */
.contact-info {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.contact-info p {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

/* Footer */
footer {
    background: #2c5f2d;
    color: white;
    text-align: center;
    padding: 2rem 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }
    
    nav ul {
        gap: 1rem;
    }
    
    #hero h2 {
        font-size: 2rem;
    }
    
    .about-content {
        flex-direction: column;
        text-align: center;
    }
    
    .research-grid {
        grid-template-columns: 1fr;
    }
}