/* Reset and 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: #fafafa;
}

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

/* Navigation */
header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 80px;
}

.logo h1 {
    color: #2c3e50;
    font-size: 1.8rem;
    margin-bottom: 0;
}

.logo p {
    color: #7f8c8d;
    font-size: 0.9rem;
    margin-top: 0;
}

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

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.nav-menu a:hover,
.nav-menu a.active {
    background-color: #3498db;
    color: white;
}

/* Clean, removed hero section styles */

/* Buttons - Simplified for academic look */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 1px solid #3498db;
    cursor: pointer;
    font-size: 1rem;
}

.btn.primary {
    background-color: #3498db;
    color: white;
    border-color: #3498db;
}

.btn.primary:hover {
    background-color: #2980b9;
    border-color: #2980b9;
}

.btn.secondary {
    background-color: transparent;
    color: white;
    border-color: white;
}

.btn.secondary:hover {
    background-color: white;
    color: #333;
}

.btn.outline {
    background-color: transparent;
    color: #3498db;
    border-color: #3498db;
}

.btn.outline:hover {
    background-color: #3498db;
    color: white;
}

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

/* Content Sections - Simplified */
section {
    padding: 4rem 0;
}

.card {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 4px;
    border-left: 3px solid #3498db;
    margin-bottom: 1.5rem;
}

.card h3 {
    color: #2c3e50;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.card h4 {
    color: #34495e;
    margin-bottom: 0.8rem;
    font-size: 1.1rem;
}

/* Page Headers */
.page-header {
    background: #34495e;
    color: white;
    padding: 3rem 0;
    text-align: center;
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.page-header p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* Content Pages */
.content-section {
    background: white;
    padding: 4rem 0;
}

.content-section h2 {
    color: #2c3e50;
    margin-bottom: 2rem;
    font-size: 2rem;
    border-bottom: 3px solid #3498db;
    padding-bottom: 0.5rem;
}

.content-section h3 {
    color: #34495e;
    margin: 2rem 0 1rem 0;
    font-size: 1.4rem;
}

.content-section p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    line-height: 1.8;
}

.two-column {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin: 2rem 0;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.skill-category {
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: 8px;
    border-top: 3px solid #3498db;
}

.skill-category h4 {
    color: #2c3e50;
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.skill-category ul {
    list-style: none;
}

.skill-category li {
    padding: 0.3rem 0;
    color: #555;
}

/* Contact Page */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin: 2rem 0;
}

.contact-info {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 8px;
}

.contact-info h3 {
    color: #2c3e50;
    margin-bottom: 1.5rem;
}

.contact-item {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
    padding: 0.5rem 0;
}

.contact-item strong {
    min-width: 100px;
    color: #34495e;
}

.contact-item a {
    color: #3498db;
    text-decoration: none;
}

.contact-item a:hover {
    text-decoration: underline;
}

/* Footer */
footer {
    background: #2c3e50;
    color: white;
    text-align: center;
    padding: 2rem 0;
}

footer a {
    color: #3498db;
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        padding: 1rem 20px;
    }

    .nav-menu {
        margin-top: 1rem;
        gap: 1rem;
    }

    .two-column,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .btn {
        min-width: 180px;
        text-align: center;
        margin-bottom: 0.5rem;
    }
}