:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --text-color: #1f2937;
    --light-text: #6b7280;
    --background-color: #ffffff;
    --section-bg: #f3f4f6;
    --card-bg: #ffffff;
    --accent-color: #2563eb;
}

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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navbar Styles */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s ease;
}

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

/* Mobile menu button */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background-color: var(--text-color);
    margin: 2px 0;
    transition: 0.3s;
    border-radius: 3px;
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

/* Hero Section */
.hero {
    height: 60vh;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(135deg, #f3f4f6 0%, #e5e7eb 100%);
    padding-top: 4rem;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 2rem;
}

.hero-image {
    position: relative;
    width: 200px;
    height: 200px;
    margin: 0 auto 2rem;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.5s ease;
}

/* .hero-image:hover {
    transform: rotate(360deg);
} */

.hero-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: opacity 0.5s ease;
}

.profile-img-main {
    opacity: 1;
}

/* .hero-image:hover .profile-img-main {
    opacity: 0;
}

.hero-image:hover .profile-img-hover {
    opacity: 1;
} */

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.subtitle {
    font-size: 1.25rem;
    color: var(--light-text);
    margin-bottom: 1.5rem;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
}

.social-links a {
    color: var(--text-color);
    font-size: 1.5rem;
    transition: color 0.3s ease;
}

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

/* Section Styles */
.section {
    padding: 6rem 0;
}

.section:nth-child(even) {
    background-color: var(--section-bg);
}

.section h2 {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
    color: var(--text-color);
}

/* About Section */
.about-content {
    max-width: 1200px;
    margin: 0 auto;
}

.about-text {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-color);
    max-width: 100%;
}

.about-text p {
    margin-bottom: 1.5rem;
}

.about-text p:last-child {
    margin-bottom: 0;
}

.profile-image {
    border-radius: 8px;
}

/* Additional Jekyll-specific styles */
.publications-list {
    margin-top: 2rem;
}

.publication-item {
    background: var(--card-bg);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.publication-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.publication-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.publication-authors {
    color: var(--light-text);
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.publication-authors {
    color: var(--text-color);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    font-style: italic;
}

.publication-venue {
    color: var(--accent-color);
    font-weight: 500;
    margin-bottom: 1rem;
}

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

.publication-link {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.3s ease;
}

.publication-link:hover {
    color: var(--secondary-color);
}

.publications-footnote {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid #e5e7eb;
    text-align: left;
}

.publications-footnote p {
    margin: 0;
    color: var(--light-text);
    font-style: italic;
}

.publications-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    gap: 1rem;
    flex-wrap: wrap;
}

.search-box {
    position: relative;
    flex: 1;
    max-width: 400px;
}

.search-box input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.search-box i {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--light-text);
}

.sort-controls select {
    padding: 0.75rem 1rem;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 1rem;
    background: white;
    min-width: 200px;
}

/* Education and Experience timeline styles */
.experience-timeline, .education-timeline {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.experience-item, .education-item {
    display: flex;
    margin-bottom: 3rem;
    position: relative;
}

.experience-date, .education-date {
    flex: 0 0 150px;
    font-weight: 600;
    color: var(--primary-color);
    padding-right: 2rem;
    text-align: right;
}

.experience-content, .education-content {
    flex: 1;
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    position: relative;
}

.experience-content::before, .education-content::before {
    content: '';
    position: absolute;
    left: -10px;
    top: 2rem;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    border: 4px solid var(--background-color);
}

.experience-title, .education-degree {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.experience-content h3, .education-content h3 {
    color: var(--text-color);
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
}

.experience-content ul, .education-content ul {
    margin-top: 1rem;
    padding-left: 1.5rem;
}

.experience-content li, .education-content li {
    margin-bottom: 0.5rem;
}

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

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

.research-item:hover {
    transform: translateY(-2px);
}

.research-item h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

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

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.1rem;
}

.contact-item i {
    color: var(--primary-color);
    width: 20px;
    text-align: center;
}

.contact-item a {
    color: var(--text-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-item a:hover {
    color: var(--primary-color);
}

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

.skill-category {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.skill-category h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.1rem;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.5rem;
}

.skill-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.skill-tag {
    background: var(--primary-color);
    color: white;
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.skill-tag:hover {
    background: var(--secondary-color);
    transform: translateY(-1px);
}

/* Software section styles */
.software-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.software-item {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
}

.software-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.software-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.software-item h4 {
    color: var(--primary-color);
    margin: 0;
    font-size: 1.2rem;
    font-weight: 600;
    flex: 1;
}

.software-meta {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-shrink: 0;
}

.software-language {
    background: var(--accent-color);
    color: white;
    padding: 0.3rem 0.6rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.software-stars {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    color: var(--primary-color);
    font-weight: 500;
    font-size: 0.85rem;
}

.software-stars i {
    color: #fbbf24;
    font-size: 0.8rem;
}

.software-description {
    color: var(--text-color);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.software-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.3s ease;
}

.software-link:hover {
    color: var(--secondary-color);
}

.software-link i {
    font-size: 0.85rem;
}

/* Responsive design adjustments */
@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav-links {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(10px);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        gap: 2rem;
        padding-top: 2rem;
        transition: left 0.3s ease;
        z-index: 1000;
    }
    
    .nav-links.active {
        left: 0;
    }
    
    .nav-links li {
        margin: 0;
    }
    
    .nav-links a {
        font-size: 1.2rem;
        padding: 1rem;
        display: block;
        text-align: center;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .experience-item, .education-item {
        flex-direction: column;
    }
    
    .experience-date, .education-date {
        text-align: left;
        margin-bottom: 1rem;
        flex: none;
    }
    
    .publications-controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-box {
        max-width: none;
    }
    
    .skills-grid, .software-grid {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding: 0 1rem;
    }
    
    .section {
        padding: 4rem 0;
    }
}
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 300px;
    float: left;
    margin: 0 2rem 1rem 0;
    shape-outside: margin-box;
}

.profile-image img {
    width: 100%;
    height: auto;
    display: block;
}

.read-more-btn {
    display: block;
    margin: 2rem auto 0;
    padding: 0.75rem 1.5rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s ease;
}

.read-more-btn:hover {
    background-color: var(--secondary-color);
}

.read-more-btn.expanded::after {
    content: "Read Less";
}

.read-more-btn:not(.expanded)::after {
    content: "Read More";
}

/* Publications Section */
.publications-summary {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
    margin-bottom: 3rem;
    padding: 2rem;
    background: white;
    border-radius: 1rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.view-all-link {
    flex-shrink: 0;
}

.view-all-link .btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    border: 2px solid var(--primary-color);
    font-weight: 500;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.view-all-link .btn:hover {
    background: var(--secondary-color);
    border-color: var(--secondary-color);
    transform: translateY(-2px);
}

.summary-item {
    text-align: center;
    min-width: 120px;
}

.summary-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.summary-label {
    font-size: 1rem;
    color: var(--light-text);
}

.summary-details {
    display: block;
    font-size: 0.8rem;
    color: var(--light-text);
    margin-top: 0.25rem;
    font-style: italic;
}

.publications-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    gap: 1rem;
}

.search-box {
    position: relative;
    flex: 1;
    max-width: 400px;
}

.search-box input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    border: 1px solid #e5e7eb;
    border-radius: 0.5rem;
    font-size: 1rem;
}

.search-box i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--light-text);
}

.sort-controls select {
    padding: 0.75rem 1rem;
    border: 1px solid #e5e7eb;
    border-radius: 0.5rem;
    font-size: 1rem;
    background-color: white;
}

.publications-table-container {
    width: 100%;
    overflow-x: auto;
    margin: 20px 0;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.publications-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin: 0 auto;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    overflow: hidden;
}

.publications-table th,
.publications-table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #e0e0e0;
    border-right: 1px solid #e0e0e0;
}

.publications-table th {
    background-color: #f8f9fa;
    font-weight: 600;
    color: #333;
    border-bottom: 2px solid #e0e0e0;
}

.publications-table tr:hover {
    background-color: #f5f5f5;
}

.publications-table td:last-child,
.publications-table th:last-child {
    border-right: none;
}

.publications-table tr:last-child td {
    border-bottom: none;
}

.publications-table td:nth-child(1) { /* Year column */
    width: 8%;
}

.publications-table td:nth-child(2) { /* Title column */
    width: 30%;
}

.publications-table td:nth-child(3) { /* Authors column */
    width: 35%;
}

.publications-table td:nth-child(4) { /* Journal column */
    width: 20%;
}

.publications-table td:nth-child(5) { /* PMID column */
    width: 7%;
}

.publications-table a {
    color: var(--primary-color);
    text-decoration: none;
}

.publications-table a:hover {
    text-decoration: underline;
}

/* Experience Section */
.experience-timeline {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
    background: #f8f9fa;
    border-radius: 10px;
}

.experience-timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    width: 6px;
    height: 100%;
    background: #007bff;
    transform: translateX(-50%);
    z-index: -1;
}

.experience-item {
    position: relative;
    margin-bottom: 60px;
    width: 100%;
    opacity: 1;
    transform: translateY(0);
    transition: all 0.8s ease;
}

.experience-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.experience-date {
    position: absolute;
    background: #007bff;
    color: white;
    padding: 8px 20px;
    border-radius: 30px;
    font-weight: bold;
    margin-bottom: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    z-index: 10;
    font-size: 1.1rem;
    top: -20px;
    width: fit-content;
}

/* Position dates on alternating sides */
.experience-item:nth-child(odd) .experience-date {
    left: 5%;
    transform: none;
}

.experience-item:nth-child(even) .experience-date {
    right: 5%;
    transform: none;
}

.experience-content {
    position: relative;
    width: 45%;
    padding: 30px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.1);
    margin: 20px auto;
    transition: all 0.5s ease;
    z-index: 10;
    border: 1px solid rgba(0,0,0,0.1);
    margin-top: 40px;
    transform: scale(0.95);
}

.experience-item:nth-child(odd) .experience-content {
    margin-left: 5%;
    float: left;
}

.experience-item:nth-child(even) .experience-content {
    margin-left: 50%;
    float: right;
}

.experience-content:hover {
    transform: translateY(-15px) scale(1.02);
    box-shadow: 0 15px 30px rgba(0,0,0,0.15);
}

.experience-content h3 {
    color: #007bff;
    margin-bottom: 15px;
    font-size: 1.5rem;
    font-weight: 600;
}

.experience-title {
    color: #333;
    margin-bottom: 20px;
    font-weight: 500;
    font-size: 1.2rem;
}

.experience-content ul {
    list-style-type: disc;
    padding-left: 20px;
    margin-top: 15px;
}

.experience-content li {
    margin-bottom: 12px;
    line-height: 1.6;
    color: #555;
}

/* Clear floats */
.experience-item::after {
    content: "";
    display: table;
    clear: both;
}

/* Mobile Responsiveness for Experience Section */
@media (max-width: 768px) {
    .experience-timeline::before {
        left: 30px;
        transform: none;
    }

    .experience-date {
        left: 15px !important;
        right: auto !important;
        transform: none;
        margin-left: 0;
        font-size: 1rem;
        padding: 8px 20px;
        top: -15px;
    }

    .experience-content {
        width: 85%;
        margin-left: 15% !important;
        float: none !important;
        padding: 20px;
        margin-top: 30px;
    }

    .experience-item:nth-child(odd) .experience-content,
    .experience-item:nth-child(even) .experience-content {
        margin-left: 15% !important;
        float: none !important;
    }
}

/* Add scroll animation */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Contact Section */
.contact-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
    padding: 20px 0;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 1rem;
}

.contact-links a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s ease;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    background: #f8f9fa;
}

.contact-links a:hover {
    color: var(--primary-color);
    background: #e9ecef;
}

.contact-links i {
    font-size: 1.2rem;
}

.contact-links span {
    font-size: 1rem;
}

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

/* CV Section */
.resume-content {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.resume-download {
    text-align: center;
}

.resume-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 0.5rem;
    font-weight: 500;
    transition: background-color 0.3s ease;
}

.resume-button:hover {
    background-color: var(--secondary-color);
}

.resume-preview {
    background: white;
    border-radius: 1rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.resume-preview iframe {
    border: none;
    width: 100%;
    min-height: 600px;
}

@media (max-width: 768px) {
    .hero {
        height: auto;
        min-height: auto;
        padding: 6rem 0 4rem;
    }
    
    .hero-image {
        width: 150px;
        height: 150px;
    }
    
    .about-text {
        font-size: 1rem;
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }

    .subtitle {
        font-size: 1.2rem;
    }

    .nav-links {
        display: none;
    }

    .resume-preview iframe {
        min-height: 400px;
    }

    .publications-summary {
        gap: 1rem;
    }

    .summary-item {
        min-width: 100px;
    }

    .summary-number {
        font-size: 2rem;
    }

    .publications-controls {
        flex-direction: column;
        align-items: stretch;
    }

    .search-box {
        max-width: none;
    }

    .publications-table {
        display: block;
        overflow-x: auto;
    }

    .experience-timeline::before {
        left: 0;
        transform: none;
    }
    
    .experience-date {
        left: 0;
        transform: none;
        margin-left: 20px;
    }
    
    .experience-content {
        width: 85%;
        margin-left: 15% !important;
    }
    
    .experience-item:nth-child(odd) .experience-content,
    .experience-item:nth-child(even) .experience-content {
        margin-left: 15% !important;
    }
}

.pagination-container {
    margin-top: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.pagination {
    display: flex;
    gap: 10px;
    align-items: center;
}

.pagination button {
    padding: 8px 12px;
    border: 1px solid #ddd;
    background-color: #f8f9fa;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.pagination button:hover:not(:disabled) {
    background-color: #e9ecef;
    border-color: #dee2e6;
}

.pagination button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pagination span {
    padding: 8px 12px;
    color: #666;
}

/* Research Interests Section */
.research-interests-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
    padding: 0 1rem;
}

.research-interest-card {
    background: #fff;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.research-interest-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
}

.research-interest-card i {
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 1rem;
    display: block;
}

.research-interest-card h3 {
    color: #2c3e50;
    margin-bottom: 1rem;
    font-size: 1.4rem;
    line-height: 1.3;
}

.research-interest-card p {
    color: #666;
    line-height: 1.6;
    font-size: 1rem;
    margin-bottom: 0;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .research-interests-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        padding: 0 0.5rem;
    }
    
    .research-interest-card {
        padding: 1.5rem;
    }

    .research-interest-card i {
        font-size: 2rem;
    }

    .research-interest-card h3 {
        font-size: 1.2rem;
    }

    .research-interest-card p {
        font-size: 0.95rem;
    }
}

@media (max-width: 480px) {
    .research-interests-grid {
        gap: 1rem;
    }
    
    .research-interest-card {
        padding: 1.25rem;
    }

    .research-interest-card i {
        font-size: 1.75rem;
    }

    .research-interest-card h3 {
        font-size: 1.1rem;
    }

    .research-interest-card p {
        font-size: 0.9rem;
    }
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    opacity: 1;
    transition: opacity 0.5s ease-out;
}

.loading-screen.fade-out {
    opacity: 0;
    pointer-events: none;
}

.scientific-icons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
    max-width: 800px;
    padding: 2rem;
}

.scientific-icons i {
    font-size: 4rem;
    color: #2c3e50;
    opacity: 0;
    transform: translateY(20px);
    animation: iconFloat 2s ease-in-out infinite;
}

.scientific-icons i:nth-child(1) { animation-delay: 0.1s; }
.scientific-icons i:nth-child(2) { animation-delay: 0.3s; }
.scientific-icons i:nth-child(3) { animation-delay: 0.5s; }
.scientific-icons i:nth-child(4) { animation-delay: 0.7s; }
.scientific-icons i:nth-child(5) { animation-delay: 0.9s; }
.scientific-icons i:nth-child(6) { animation-delay: 1.1s; }

@keyframes iconFloat {
    0% {
        opacity: 0;
        transform: translateY(20px);
    }
    50% {
        opacity: 1;
        transform: translateY(-10px);
    }
    100% {
        opacity: 0;
        transform: translateY(20px);
    }
}

.main-content {
    opacity: 0;
    transition: opacity 0.5s ease-in;
}

.main-content.fade-in {
    opacity: 1;
}

/* Responsive adjustments for loading screen */
@media (max-width: 768px) {
    .scientific-icons {
        gap: 1.5rem;
    }
    
    .scientific-icons i {
        font-size: 3rem;
    }
}

@media (max-width: 480px) {
    .scientific-icons {
        gap: 1rem;
    }
    
    .scientific-icons i {
        font-size: 2.5rem;
    }
}

/* Career Highlights Section */
.highlights-content {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 2rem;
}

.highlights-list {
    list-style: none !important;
    padding: 0 !important;
    margin: 0 !important;
}

.highlights-list li {
    position: relative !important;
    padding: 1.5rem 0 1.5rem 3rem !important;
    border-bottom: 1px solid #e5e7eb !important;
    font-size: 1.35rem !important;
    font-weight: 600 !important;
    line-height: 1.7 !important;
    color: var(--text-color) !important;
    transition: all 0.3s ease !important;
    border-radius: 8px !important;
    margin: 0.5rem 0 !important;
    cursor: pointer !important;
}

.highlights-list li:last-child {
    border-bottom: none;
}

.highlights-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    top: 1.5rem;
    color: var(--primary-color);
    font-size: 1.5rem;
    font-weight: bold;
    line-height: 1;
}

.highlights-list li:hover {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding-left: 3.5rem;
    padding-right: 1.5rem;
    border-radius: 12px;
    margin: 0.5rem -1rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
    border-left: 4px solid var(--primary-color);
    font-weight: 700;
}

/* Mobile Responsiveness for Career Highlights Section */
@media (max-width: 768px) {
    .highlights-content {
        padding: 0 1rem;
    }

    .highlights-list li {
        padding: 1.25rem 0 1.25rem 2.5rem;
        font-size: 1.2rem;
        font-weight: 600;
    }

    .highlights-list li::before {
        left: 0.5rem;
        top: 1.25rem;
        font-size: 1.25rem;
    }

    .highlights-list li:hover {
        padding-left: 3rem;
        padding-right: 1rem;
        margin: 0.5rem -0.5rem;
        box-shadow: 0 3px 8px rgba(0, 0, 0, 0.1);
        transform: translateY(-1px);
        border-left: 3px solid var(--primary-color);
        font-weight: 700;
    }
}

@media (max-width: 480px) {
    .highlights-list li {
        padding: 1rem 0 1rem 2rem;
        font-size: 1.1rem;
        font-weight: 600;
    }

    .highlights-list li::before {
        left: 0.25rem;
        top: 1rem;
        font-size: 1.1rem;
    }

    .highlights-list li:hover {
        padding-left: 2.5rem;
        padding-right: 0.75rem;
        margin: 0.5rem -0.25rem;
        box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
        transform: translateY(-1px);
        border-left: 3px solid var(--primary-color);
        font-weight: 700;
    }
}

/* Education Section */
.education-timeline {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
    background-color: var(--section-bg);
    border-radius: 16px;
}

.education-timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background-color: var(--accent-color);
    opacity: 0.3;
}

.education-item {
    position: relative;
    margin-bottom: 40px;
    width: 100%;
}

.education-date {
    position: absolute;
    left: 0;
    width: 200px;
    text-align: right;
    padding-right: 30px;
    color: var(--accent-color);
    font-weight: 600;
    font-size: 1.3rem;
}

.education-content {
    margin-left: 220px;
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.08);
    width: calc(100% - 220px);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.education-content:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.12);
}

.education-content h3 {
    margin: 0 0 10px 0;
    color: var(--text-color);
    font-size: 1.8rem;
}

.education-degree {
    font-weight: 600;
    color: var(--accent-color);
    margin: 5px 0;
    font-size: 1.4rem;
}

.education-details {
    color: var(--light-text);
    margin: 5px 0;
    font-size: 1.2rem;
}

/* Media Queries */
@media (max-width: 768px) {
    .section {
        padding: 4rem 0;
    }

    .section h2 {
        font-size: 2rem;
        margin-bottom: 2rem;
    }

    .education-timeline {
        padding: 15px;
    }

    .education-date {
        position: relative;
        left: 0;
        width: 100%;
        text-align: left;
        padding-right: 0;
        margin-bottom: 10px;
        font-size: 1.2rem;
    }

    .education-content {
        margin-left: 0;
        width: 100%;
        padding: 20px;
    }

    .education-content h3 {
        font-size: 1.6rem;
    }

    .education-degree {
        font-size: 1.2rem;
    }

    .education-details {
        font-size: 1.1rem;
    }
}

@media (max-width: 480px) {
    .section {
        padding: 3rem 0;
    }

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

    .education-content {
        padding: 15px;
    }
}