:root {
    /* Color Palette - Pastel Blue Theme */
    --primary-color: #5aa9e6;
    /* Richer pastel blue */
    --primary-light: #7fc8f8;
    --primary-dark: #3a86c6;
    --accent-color: #ff9fb2;
    /* Soft pink accent if needed, or stick to blues */
    --bg-color: #f9fcff;
    /* Very light blue tint */
    --text-color: #333333;
    --text-light: #666666;
    --white: #ffffff;
    --border-color: #e1e8ed;

    /* Layout */
    --container-width: 1200px;
    --header-height: 80px;
}

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

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

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.site-header {
    height: var(--header-height);
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo img {
    height: 50px;
    width: auto;
}

.logo-text h1 {
    font-size: 1.2rem;
    color: var(--primary-dark);
    font-weight: 700;
}

.logo-text p {
    font-size: 0.75rem;
    color: var(--text-light);
    letter-spacing: 0.5px;
}

.main-nav ul {
    display: flex;
    gap: 30px;
}

.main-nav a {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-color);
    position: relative;
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--primary-color);
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s;
}

.main-nav a:hover::after,
.main-nav a.active::after {
    width: 100%;
}

.mobile-menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero-section {
    position: relative;
    height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background-color: var(--primary-light);
    /* Fallback */
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('../assets/images/hero_background.png');
    background-size: cover;
    background-position: center;
    filter: brightness(0.9) contrast(0.95);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(90, 169, 230, 0.8), rgba(255, 255, 255, 0.6));
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 900px;
    color: var(--text-color);
}

.hero-content h2 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 5px;
    color: #fff;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.university-name {
    font-size: 1.3rem;
    font-weight: 400;
    margin-bottom: 25px;
    color: rgba(255, 255, 255, 0.9);
    font-style: italic;
}

.hero-description {
    font-size: 1.2rem;
    margin-bottom: 40px;
    color: #fff;
    font-weight: 500;
}

.highlight {
    color: #fff;
    /* Keeping white for cleanliness on the pastel bg */
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s;
    margin: 0 10px;
}

.btn-primary {
    background: var(--white);
    color: var(--primary-color);
    border: 2px solid var(--white);
}

.btn-primary:hover {
    background: transparent;
    color: var(--white);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

.btn-outline:hover {
    background: var(--white);
    color: var(--primary-color);
}

/* PI Section */
.pi-section {
    padding: 100px 0;
    background: var(--white);
}

.pi-container {
    display: flex;
    align-items: center;
    gap: 60px;
}

.pi-image {
    flex: 0 0 250px;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(90, 169, 230, 0.2);
}

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

.pi-content {
    flex: 1;
}

.section-badge {
    display: inline-block;
    padding: 5px 15px;
    background: #eef7ff;
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.pi-content h3 {
    font-size: 2.2rem;
    margin-bottom: 10px;
    color: var(--primary-dark);
}

.pi-name {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-light);
    margin-bottom: 25px;
}

.pi-text p {
    margin-bottom: 20px;
    text-align: justify;
    line-height: 1.8;
}

.intro-text {
    font-size: 1.15rem;
    color: var(--primary-dark);
    margin-bottom: 25px !important;
}

/* Explore Grid */
.explore-section {
    padding: 100px 0;
    background-color: var(--bg-color);
}

.section-header {
    margin-bottom: 50px;
}

.section-header h3 {
    font-size: 2rem;
    color: var(--primary-dark);
    margin-bottom: 15px;
}

.explore-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-bottom: 50px;
    max-width: 1000px;
    /* Optional: Constrain width so 2 columns don't look too stretched */
    margin-left: auto;
    margin-right: auto;
}

@media (max-width: 768px) {
    .explore-grid {
        grid-template-columns: 1fr;
    }
}

.explore-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.03);
    transition: transform 0.3s, box-shadow 0.3s;
    border-top: 5px solid transparent;
}

.explore-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(90, 169, 230, 0.15);
    border-top-color: var(--primary-color);
}

.icon-box {
    width: 60px;
    height: 60px;
    background: #eef7ff;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 25px;
}

.explore-card h4 {
    font-size: 1.25rem;
    margin-bottom: 15px;
    color: var(--text-color);
}

.explore-card p {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 25px;
    min-height: 48px;
}

.card-link {
    color: var(--primary-color);
    font-size: 1.1rem;
}

.explore-footer {
    text-align: center;
    margin-top: 60px;
}

.explore-footer p {
    margin-bottom: 20px;
    color: var(--text-light);
}

.explore-footer .btn-primary {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

.explore-footer .btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
}

/* Collaborators */
.collaborators-section {
    padding: 60px 0;
    background: var(--white);
    text-align: center;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.collaborators-section h3 {
    margin-bottom: 40px;
    color: var(--text-light);
    font-size: 1.2rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.logos-grid {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 50px;
    flex-wrap: wrap;
    opacity: 0.6;
}

.collab-logo {
    height: 50px;
    width: auto;
    object-fit: contain;
    filter: grayscale(100%);
    opacity: 0.7;
    transition: all 0.3s;
}

.collab-logo:hover {
    filter: grayscale(0%);
    opacity: 1;
}

/* Footer */
.site-footer {
    background: #2b3a4a;
    /* Darker blue/slate */
    color: #dfe6ed;
    padding-top: 80px;
}

.footer-container {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 40px;
    padding-bottom: 60px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 15px;
}

.footer-logo-img {
    height: 40px;
    width: auto;
}

.footer-brand h4 {
    font-size: 1.4rem;
    color: var(--white);
    margin-bottom: 2px;
}

.footer-links h5,
.footer-contact h5 {
    color: var(--white);
    font-size: 1.1rem;
    margin-bottom: 25px;
}

.footer-links ul li {
    margin-bottom: 10px;
}

.footer-contact p {
    margin-bottom: 15px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.footer-contact i {
    color: var(--white);
    /* Changed to white */
    margin-top: 5px;
    /* Alignment for multi-line address */
}

.address-paragraph span {
    flex: 1;
}

.footer-bottom {
    background: #232f3c;
    padding: 20px 0;
    text-align: center;
    font-size: 0.85rem;
    color: #8fa0b0;
}

/* Utilities */
.center {
    text-align: center;
}

/* Responsive */
@media (max-width: 900px) {
    .pi-container {
        flex-direction: column;
    }

    .pi-image {
        flex: 0 0 auto;
        width: 100%;
        max-width: 400px;
    }
}

@media (max-width: 768px) {
    .main-nav {
        display: none;
    }

    .mobile-menu-toggle {
        display: block;
    }

    .hero-content h2 {
        font-size: 2.2rem;
    }

    .footer-container {
        flex-direction: column;
        text-align: center;
    }

    .footer-contact p {
        justify-content: center;
    }
}

/* Contact Page Styles */
.contact-page-section {
    padding: 80px 0;
    min-height: 80vh;
}

.contact-layout {
    display: flex;
    gap: 50px;
    align-items: flex-start;
}

.contact-info-form {
    flex: 1;
}

.contact-map {
    flex: 1;
    height: 100%;
    min-height: 500px;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
}

.contact-header-info {
    margin-bottom: 50px;
}

.contact-header-info h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 20px;
    line-height: 1.4;
}

.contact-address {
    margin-bottom: 20px;
    color: var(--text-light);
}

.contact-details p {
    margin-bottom: 5px;
    color: var(--text-color);
    font-weight: 500;
}

/* Contact Form */
.contact-form-wrapper h3 {
    font-size: 1.8rem;
    margin-bottom: 10px;
    color: var(--text-color);
}

.form-instruction {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 30px;
}

.required {
    color: #e74c3c;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-color);
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 25px;
    /* Rounded Style as per screenshot hint, or stick to theme */
    font-family: inherit;
    font-size: 1rem;
    background-color: #fcfcfc;
    transition: border-color 0.3s;
}

textarea.form-control {
    border-radius: 15px;
    resize: vertical;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    background-color: #fff;
}

.submit-btn {
    padding: 12px 40px;
    background-color: var(--primary-color);
    color: var(--white);
    border: 1px solid var(--primary-color);
    cursor: pointer;
    font-weight: 600;
    /* Ensure font weight matches */
}

.submit-btn:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    color: var(--white);
}

/* Responsive */
@media (max-width: 900px) {
    .contact-layout {
        flex-direction: column;
    }

    .contact-map {
        width: 100%;
        min-height: 300px;
    }
}

/* News Page Styles */
.news-page-section {
    padding: 80px 0;
    min-height: 80vh;
    background-color: var(--bg-color);
}

.news-container {
    max-width: 900px;
    /* Constrain width for better readability */
}

.news-header {
    margin-bottom: 60px;
}

.news-header h2 {
    font-size: 2.2rem;
    color: var(--text-color);
    margin-bottom: 10px;
    font-weight: 700;
}

.news-header p {
    color: var(--text-light);
    font-size: 1.1rem;
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.news-card {
    background: var(--white);
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.03);
    border: 1px solid var(--border-color);
    transition: transform 0.3s, box-shadow 0.3s;
}

.news-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(90, 169, 230, 0.1);
}

.news-meta-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    font-size: 0.9rem;
    color: var(--text-light);
}

.news-date i {
    margin-right: 5px;
}

.news-id {
    font-weight: 600;
    opacity: 0.7;
}

.news-title {
    font-size: 1.6rem;
    color: var(--text-color);
    margin-bottom: 15px;
    font-weight: 700;
    line-height: 1.3;
}

.news-location {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 25px;
    font-style: italic;
}

.news-content {
    color: #4a4a4a;
    line-height: 1.7;
}

.seminar-item {
    margin-bottom: 15px;
    font-weight: 600;
    color: var(--text-color);
    border-bottom: 2px solid #f0f0f0;
    padding-bottom: 5px;
    display: inline-block;
}

.seminar-talk {
    margin-bottom: 20px;
    padding-left: 10px;
    border-left: 3px solid var(--primary-light);
}

.seminar-talk strong {
    color: #333;
}

.mt-3 {
    margin-top: 30px;
}

/* Team Page Styles */
.team-page-section {
    padding: 80px 0;
    min-height: 80vh;
    background-color: var(--bg-color);
}

.team-header {
    margin-bottom: 50px;
}

.team-header h2 {
    font-size: 2.2rem;
    color: var(--text-color);
    margin-bottom: 15px;
    font-weight: 700;
}

.team-header p {
    color: var(--text-light);
    font-size: 1.1rem;
}

/* Professor Card */
.professor-card-container {
    display: flex;
    justify-content: center;
    margin-bottom: 80px;
}

.professor-card {
    background: var(--white);
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    text-align: center;
    max-width: 500px;
    width: 100%;
    border-top: 5px solid transparent;
    transition: all 0.3s;
}

.professor-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(90, 169, 230, 0.15);
    border-top-color: var(--primary-color);
}

.prof-image-box {
    width: 200px;
    height: 200px;
    margin: 0 auto 25px;
    border-radius: 20px;
    overflow: hidden;
    /* Style somewhat like the screenshot - rounded rect */
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    border: 3px solid #eef7ff;
}

.prof-image-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.professor-card h3 {
    font-size: 1.5rem;
    color: var(--text-color);
    margin-bottom: 5px;
    font-weight: 700;
}

.prof-title {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 15px;
}

.prof-email {
    display: inline-block;
    color: var(--text-light);
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.prof-email:hover {
    color: var(--primary-color);
}

.prof-desc {
    font-size: 0.95rem;
    color: var(--text-light);
    line-height: 1.6;
}

/* Students Grid */
.students-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
    margin-bottom: 80px;
}

@media (max-width: 1100px) {
    .students-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .students-grid {
        grid-template-columns: 1fr;
    }
}

.student-card {
    background: var(--white);
    border-radius: 12px;
    padding: 30px 20px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.03);
    border: 1px solid var(--border-color);
    transition: transform 0.3s;
}

.student-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-light);
}

.student-img {
    width: 120px;
    height: 140px;
    /* Portrait aspect ratio as per screenshot */
    margin: 0 auto 20px;
    border-radius: 10px;
    overflow: hidden;
    background-color: #f0f0f0;
}

.student-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.student-card h4 {
    font-size: 1.1rem;
    color: var(--text-color);
    margin-bottom: 5px;
    font-weight: 700;
}

.student-role {
    color: var(--text-light);
    font-size: 0.85rem;
    margin-bottom: 20px;
}

.student-links {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 20px;
}

.student-links a {
    color: #999;
    font-size: 1rem;
    transition: color 0.3s;
}

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

.student-email {
    display: block;
    font-size: 0.8rem;
    color: var(--primary-color);
    opacity: 0.8;
}

.student-email:hover {
    opacity: 1;
}

/* Alumni Section */
.alumni-section {
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
}

.alumni-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    max-width: 900px;
    margin: 0 auto;
}

.alumni-card {
    background: var(--white);
    border-radius: 12px;
    padding: 25px;
    display: flex;
    align-items: flex-start;
    gap: 25px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    border: 1px solid var(--border-color);
}

.alumni-img {
    flex: 0 0 80px;
    height: 80px;
    border-radius: 50%;
    overflow: hidden;
    background-color: #f0f0f0;
}

.alumni-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.alumni-info {
    flex: 1;
}

.alumni-header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 5px;
}

.alumni-info h3 {
    font-size: 1.1rem;
    color: var(--text-color);
    margin: 0;
}

.grad-year {
    background: #f0f0f0;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.75rem;
    color: #666;
    font-weight: 600;
}

.alumni-degree {
    font-size: 0.85rem;
    color: #666;
    margin-bottom: 10px;
    font-weight: 500;
}

.alumni-desc {
    font-size: 0.9rem;
    color: var(--text-color);
    margin-bottom: 10px;
}

.alumni-current {
    font-size: 0.85rem;
    color: var(--primary-color);
    margin-bottom: 5px;
    font-weight: 500;
}

.alumni-email {
    font-size: 0.8rem;
    color: var(--text-light);
}

@media (max-width: 600px) {
    .alumni-card {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .alumni-header-row {
        flex-direction: column;
        gap: 5px;
    }
}

/* Research Page Styles */
.research-page-section {
    padding: 80px 0;
    min-height: 50vh;
    background-color: var(--bg-color);
}

.research-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.research-card {
    background: var(--white);
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.03);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.research-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    border-color: var(--primary-light);
}

.research-icon-img {
    width: 480px;
    height: 200px;
    margin-top: 5px;
    margin-bottom: 5px;
}

.research-icon-img img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.research-card h3 {
    font-size: 1.4rem;
    color: var(--text-color);
    margin-bottom: 15px;
    font-weight: 700;
}

.research-card p {
    font-size: 1rem;
    color: var(--text-light);
    line-height: 1.6;
}

/* Full width card for 3rd row */
.full-width-card {
    grid-column: 1 / -1;
    flex-direction: row;
    align-items: center;
    gap: 30px;
}

.icon-box-large {
    width: 80px;
    height: 80px;
    background-color: #f0f7ff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 2.5rem;
    flex-shrink: 0;
}

.full-width-content {
    flex: 1;
}

@media (max-width: 768px) {
    .research-grid {
        grid-template-columns: 1fr;
    }

    .full-width-card {
        flex-direction: column;
        text-align: center;
    }
}

/* Projects Section */
.projects-section {
    padding: 80px 0;
    background-color: #f9f9f9;
}

.projects-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    max-width: 1000px;
    margin: 0 auto;
}

.project-card {
    background: var(--white);
    border-radius: 10px;
    padding: 30px;
    border: 1px solid var(--border-color);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.02);
}

.project-card.completed {
    opacity: 0.9;
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.project-badge {
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    color: white;
}

.ongoing-badge {
    background-color: #27ae60;
}

.completed-badge {
    background-color: #7f8c8d;
}

.project-date {
    font-size: 0.9rem;
    color: #888;
}

.project-title-kr {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 8px;
}

.project-title-en {
    font-size: 1.05rem;
    color: #555;
    margin-bottom: 15px;
}

.project-fund {
    font-size: 0.9rem;
    color: var(--primary-color);
    font-weight: 500;
}

.project-image {
    margin-top: 20px;
    max-width: 100%;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid #eee;
}

.project-image img {
    width: 100%;
    height: auto;
    max-height: 400px;
    object-fit: contain;
    background-color: #f8f8f8;
}

/* Toggle Button */
.projects-toggle-container {
    text-align: center;
    margin: 40px 0;
}

.toggle-btn {
    /* Styles matching .btn-primary from Hero but for light bg */
    background: var(--white);
    color: var(--primary-color);
    font-weight: 600;
    /* Match Hero button weight */
    border: 2px solid var(--white);
    /* Start with white border like Hero, or distinct if needed. Using white to keep it clean with shadow */
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    /* Keep shadow for visibility on light bg */
    cursor: pointer;
}

.toggle-btn:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(90, 169, 230, 0.3);
    /* Add colored shadow on hover */
}

.projects-list.hidden {
    display: none;
}

/* Publication Page Styles */
.publications-page-section {
    padding: 80px 0;
    min-height: 50vh;
}

.bg-light {
    background-color: #f9f9f9;
}

.publications-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    max-width: 1000px;
    margin: 0 auto;
}

.publications-list.hidden {
    display: none;
}

.pub-card {
    background: var(--white);
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    border: 1px solid var(--border-color);
    transition: transform 0.2s;
}

.pub-card:hover {
    transform: translateY(-2px);
    border-color: var(--primary-light);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.pub-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.pub-badge {
    padding: 4px 10px;
    border-radius: 15px;
    font-size: 0.75rem;
    font-weight: 600;
    color: white;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.pub-badge.journal {
    background-color: #55c57a;
    /* Greenish */
}

.pub-badge.conference {
    background-color: #5aa9e6;
    /* Blueish */
}

.pub-badge.thesis {
    background-color: #9b59b6;
    /* Purple for thesis */
}

.pub-badge.book {
    background-color: #e67e22;
    /* Orange for book */
}

.pub-badge.patent {
    background-color: #2ecc71;
    /* Another green for patent */
}

.pub-year {
    font-size: 0.9rem;
    color: #888;
}

.pub-title {
    font-size: 1.2rem;
    margin-bottom: 8px;
    color: var(--text-color);
    line-height: 1.4;
    font-weight: 700;
}

.pub-authors {
    font-size: 0.95rem;
    color: #555;
    margin-bottom: 8px;
}

.pub-venue {
    font-size: 0.9rem;
    color: var(--primary-color);
    font-weight: 500;
    line-height: 1.5;
}

.section-header h2 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-color);
}

/* Mobile Navigation Styles */
@media screen and (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
    }

    .main-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--white);
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        padding: 20px 0;
        border-top: 1px solid #f0f0f0;
    }

    .main-nav.active-mobile {
        display: block;
        animation: slideDown 0.3s ease forwards;
    }

    @keyframes slideDown {
        from {
            opacity: 0;
            transform: translateY(-10px);
        }

        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .main-nav ul {
        flex-direction: column;
        gap: 0;
    }

    .main-nav li {
        width: 100%;
        text-align: center;
    }

    .main-nav a {
        display: block;
        padding: 15px 0;
        border-bottom: 1px solid #f9f9f9;
    }

    .main-nav a:hover,
    .main-nav a.active {
        background-color: #f5faff;
        color: var(--primary-color);
    }

    .main-nav a::after {
        display: none;
    }

    /* Research Page Mobile Fixes */
    .research-grid {
        grid-template-columns: 1fr;
    }

    .research-card {
        width: 100%;
        padding: 20px;
    }

    .research-icon-img {
        width: 100%;
        height: auto;
    }

    .research-icon-img img {
        width: 100%;
        height: auto;
        object-fit: contain;
    }

    .full-width-card {
        flex-direction: column;
        text-align: center;
    }
}