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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header styles */
header {
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: #003366;
}

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

nav ul li {
    margin-left: 30px;
}

nav ul li a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
}

nav ul li a:hover {
    color: #003366;
}

/* Hero section */
.hero {
    background-color: #f8f9fa;
    padding: 80px 0;
    text-align: center;
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: #003366;
}

.hero p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto;
    color: #666;
}

/* Section styles */
section {
    padding: 80px 0;
}

section h2 {
    font-size: 2rem;
    margin-bottom: 40px;
    text-align: center;
    color: #003366;
}

/* About section */
.about {
    background-color: #fff;
}

.about p {
    font-size: 1.1rem;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

/* Research section */
.research {
    background-color: #f8f9fa;
}

.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.research-item {
    background-color: #fff;
    padding: 30px;
    border-radius: 5px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.research-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.research-item h3 {
    color: #003366;
    margin-bottom: 15px;
}

/* Publications section */
.publications {
    background-color: #fff;
}

.publication-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.publication-item {
    padding: 20px;
    border-left: 4px solid #003366;
    background-color: #f8f9fa;
}

.publication-item h3 {
    color: #003366;
    margin-bottom: 10px;
}

/* Team section */
.team {
    background-color: #f8f9fa;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.team-member {
    text-align: center;
    padding: 30px;
    background-color: #fff;
    border-radius: 5px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.team-member h3 {
    color: #003366;
    margin-bottom: 10px;
}

/* Contact section */
.contact {
    background-color: #fff;
    text-align: center;
}

/* Footer */
footer {
    background-color: #003366;
    color: #fff;
    text-align: center;
    padding: 30px 0;
}

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

    nav ul {
        margin-top: 15px;
    }

    nav ul li {
        margin: 0 10px;
    }

    .hero h2 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    section {
        padding: 60px 0;
    }

    section h2 {
        font-size: 1.8rem;
    }
}