:root {
    --primary-dark: #0b4f6c;
    --primary-medium: #087ca7;
    --primary-light: #01baef;
    --secondary-dark: #083344;
    --secondary-light: #e1f5fe;
    --accent: #ff6b6b;
    --light-bg: #f8fafc;
    --text-dark: #222;
    --text-medium: #444;
    --text-light: #666;
    --white: #ffffff;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 15px 40px rgba(0, 0, 0, 0.15);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

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

/* =========================================== */
/* RESPONSIVE IMPROVEMENTS                    */
/* =========================================== */

/* Logo Responsiveness */
.logo-img {
    max-height: 200px;
    width: auto;
    transition: all 0.3s ease;
}

/* Tablet view */
@media (max-width: 1024px) {
    .logo-img {
        max-height: 160px;
    }
    
    .header-container {
        padding: 20px 15px;
    }
}

/* Mobile view */
@media (max-width: 768px) {
    .logo-img {
        max-height: 120px;
    }
    
    .header-container {
        padding: 15px 10px;
        min-height: auto;
    }
    
    .logo-wrapper {
        display: flex;
        justify-content: center;
        width: 100%;
    }
}

/* Small mobile view */
@media (max-width: 480px) {
    .logo-img {
        max-height: 100px;
    }
    
    .header-container {
        padding: 10px;
    }
}

/* Extra small devices */
@media (max-width: 360px) {
    .logo-img {
        max-height: 80px;
    }
}

/* =========================================== */
/* RESPONSIVE NAVIGATION                       */
/* =========================================== */

/* Mobile Navigation */
@media (max-width: 768px) {
    nav {
        position: relative;
        padding: 10px 0;
    }
    
    .nav-container {
        flex-direction: column;
        width: 100%;
        display: none; /* Hidden by default on mobile */
    }
    
    /* Show navigation when parent is hovered or focused */
    nav:hover .nav-container,
    nav:focus-within .nav-container {
        display: flex;
        position: absolute;
        top: 100%;
        left: 0;
        background: var(--secondary-dark);
        z-index: 1000;
        box-shadow: 0 5px 15px rgb(233, 58, 23);
    }
    
    .nav-container a {
        width: 100%;
        padding: 15px 20px;
        text-align: center;
        border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    
    .nav-container a:last-child {
        border-bottom: none;
    }
    
    /* Mobile menu indicator */
    nav::before {
        content: '☰ Menu';
        display: block;
        text-align: center;
        color: white;
        font-weight: 600;
        padding: 10px;
        cursor: pointer;
        background: rgba(34, 31, 31, 0.662);
    }
    
    nav:hover::before {
        content: '✕ Close';
    }
}

/* =========================================== */
/* RESPONSIVE PEOPLE SECTION                   */
/* =========================================== */

@media (max-width: 768px) {
    /* Adjust card grids */
    .btech-row .people-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .interns-row .people-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    /* Make cards more compact */
    .faculty-card,
    .student-card,
    .btech-card,
    .intern-card {
        min-height: 320px;
    }
    
    .person-main {
        padding: 20px 15px;
    }
    
    .person-image {
        width: 100px;
        height: 100px;
    }
    
    .person-basic-info h4 {
        font-size: 1.1rem;
    }
    
    .person-basic-info p {
        font-size: 0.9rem;
    }
    
    /* Modal adjustments for mobile */
    .faculty-card:focus-within .person-details,
    .student-card:focus-within .person-details,
    .btech-card:focus-within .person-details,
    .intern-card:focus-within .person-details {
        width: 95vw;
        max-height: 85vh;
        padding: 20px 15px;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%) !important;
    }
    
    .details-content h4 {
        font-size: 1.2rem;
        margin-bottom: 10px;
    }
    
    .details-content p {
        font-size: 0.95rem;
        line-height: 1.5;
    }
    
    .expertise {
        gap: 5px;
        margin: 10px 0;
    }
    
    .expertise-tag {
        font-size: 0.8rem;
        padding: 4px 8px;
    }
    
    .contact-info p {
        font-size: 0.85rem;
        margin-bottom: 5px;
    }
}

@media (max-width: 480px) {
    /* Single column for all cards on very small screens */
    .btech-row .people-container,
    .interns-row .people-container {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    /* Side-by-side layout for PhD & M.Tech on mobile */
    .phd-mtech-row {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    /* Smaller cards */
    .person-image {
        width: 80px;
        height: 80px;
    }
    
    .person-basic-info h4 {
        font-size: 1rem;
    }
    
    /* Modal full screen on very small devices */
    .faculty-card:focus-within .person-details,
    .student-card:focus-within .person-details,
    .btech-card:focus-within .person-details,
    .intern-card:focus-within .person-details {
        width: 100vw;
        height: 100vh;
        max-height: 100vh;
        border-radius: 0;
        top: 0;
        left: 0;
        transform: none !important;
    }
}

.endless-marquee {
    background: linear-gradient(90deg, #1a237e, #283593);
    color: white;
    padding: 15px 0;
    overflow: hidden;
    position: relative;
}

.marquee-track {
    display: flex;
    width: max-content;
    animation: scroll 20s linear infinite;
}

.marquee-content {
    display: flex;
    align-items: center;
    gap: 60px;
    padding: 0 30px;
}

.marquee-content span,
.marquee-content a {
    font-weight: 500;
    font-size: 1.1rem;
    white-space: nowrap;
}

.apply-link {
    background: #ff6b6b;
    color: white;
    padding: 8px 20px;
    border-radius: 20px;
    text-decoration: none;
    font-weight: bold;
}

/* The Magic: Continuous scroll that never stops */
@keyframes scroll {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%); /* Moves exactly one marquee-content width */
    }
}

/* Pause on hover for better UX */
.endless-marquee:hover .marquee-track {
    animation-play-state: paused;
}

/* =========================================== */
/* RESPONSIVE PUBLICATIONS SECTION             */
/* =========================================== */

/* =========================================== */
/* AUTOMATIC NUMBERED PUBLICATIONS           */
/* =========================================== */

/* Reset counter for each publication category */
.publication-category {
    counter-reset: journal-counter conference-counter;
}

/* Journal items - automatic numbering */
.publication-item.journal .pub-number::before {
    counter-increment: journal-counter;
    content: counter(journal-counter);
}

/* Conference items - automatic numbering */
.publication-item.conference .pub-number::before {
    counter-increment: conference-counter;
    content: counter(conference-counter);
}

/* Publication items styling */
.publication-item {
    position: relative;
    margin-bottom: 25px;
    padding: 20px 20px 20px 60px; /* Add left padding for number */
    background: white;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.publication-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.journal {
    border-left: 4px solid #3498db;
}

.conference {
    border-left: 4px solid #e74c3c;
}

.pub-number {
    position: absolute;
    left: 15px;
    top: 20px;
    width: 30px;
    height: 30px;
    background: #2d3748;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 0.9rem;
}

/* Hide the existing number text in HTML and show CSS-generated number */
.pub-number {
    /* Hide the HTML text */
    color: transparent;
    overflow: hidden;
}

.pub-number::before {
    /* Show CSS-generated number */
    color: white;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.pub-content {
    padding-left: 0;
}

.pub-title {
    color: #4a5568;
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 10px;
}

.pub-title strong {
    color: #2d3748;
}

.pub-title em {
    color: #2d3748;
    font-style: italic;
}

.pub-venue {
    color: #3498db;
    font-weight: 500;
}

.pub-metrics {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 10px;
}

.impact-factor, .quartile, .award, .conference-type, .paper-type {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

.impact-factor {
    background: #4299e1;
    color: white;
}

.quartile {
    color: white;
}

.q1 {
    background: #e74c3c;
}

.q2 {
    background: #f39c12;
}

.award {
    background: #f39c12;
    color: white;
}

.conference-type {
    background: #8e44ad;
    color: white;
}

.paper-type {
    background: #3498db;
    color: white;
}

/* Publication Statistics */
.publication-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-top: 60px;
    text-align: center;
}

.stat-item {
    padding: 25px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: bold;
    color: #3498db;
    margin-bottom: 10px;
}

.stat-label {
    color: #4a5568;
    font-size: 1.1rem;
}

/* =========================================== */
/* RESPONSIVE DESIGN - UPDATED                */
/* =========================================== */

@media (max-width: 768px) {
    #publications .container {
        padding: 0 15px;
    }
    
    .publication-item {
        padding: 15px 15px 15px 50px; /* Adjusted left padding */
        margin-bottom: 15px;
    }
    
    .pub-number {
        position: absolute; /* Keep absolute positioning */
        left: 10px;
        top: 15px;
        width: 25px;
        height: 25px;
        font-size: 0.8rem;
        display: flex; /* Keep as flex */
    }
    
    .pub-content {
        padding-left: 0;
    }
    
    .pub-title {
        font-size: 0.95rem;
        line-height: 1.5;
    }
    
    .pub-metrics {
        flex-direction: column;
        align-items: flex-start;
        gap: 5px;
    }
    
    .publication-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    
    .stat-item {
        padding: 15px;
    }
    
    .stat-number {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .publication-stats {
        grid-template-columns: 1fr;
    }
    
    .pub-title {
        font-size: 0.9rem;
    }
    
    .publication-item {
        padding: 15px 15px 15px 45px; /* Smaller left padding for mobile */
    }
    
    .pub-number {
        width: 22px;
        height: 22px;
        left: 8px;
        top: 12px;
        font-size: 0.7rem;
    }
}

/* =========================================== */
/* COMPATIBILITY FIXES                        */
/* =========================================== */

/* Make sure existing HTML numbers don't show up */
.pub-number span,
.pub-number div {
    display: none;
}

/* Ensure CSS counters work correctly */
.publication-list {
    display: block;
}

/* Fix for Firefox */
@-moz-document url-prefix() {
    .pub-number::before {
        line-height: 30px;
    }
    
    @media (max-width: 768px) {
        .pub-number::before {
            line-height: 25px;
        }
    }
}

/* Safari specific fix */
@media not all and (min-resolution:.001dpcm) { 
    @supports (-webkit-appearance:none) {
        .pub-number {
            color: rgba(255, 255, 255, 0);
        }
        .pub-number::before {
            color: white;
        }
    }
}

/* =========================================== */
/* COMPREHENSIVE AUTOMATIC COUNTER SYSTEM     */
/* =========================================== */

/* Reset all counters */
#publications {
    counter-reset: journal-papers conference-papers best-paper-awards acl-papers;
}

/* Count each journal paper */
.publication-item.journal {
    counter-increment: journal-papers;
}

/* Count each conference paper */
.publication-item.conference {
    counter-increment: conference-papers;
}

/* Count awards - you'll need to add a class to award-winning papers */
.publication-item.award-winning {
    counter-increment: best-paper-awards;
}

/* Count ACL papers - you'll need to add a class to ACL papers */
.publication-item.acl-paper {
    counter-increment: acl-papers;
}

/* Update all stat numbers */
.stat-item:nth-child(1) .stat-number::before {
    content: counter(journal-papers);
}

.stat-item:nth-child(2) .stat-number::before {
    content: counter(conference-papers);
}

.stat-item:nth-child(3) .stat-number::before {
    content: counter(best-paper-awards);
}

.stat-item:nth-child(4) .stat-number::before {
    content: counter(acl-papers);
}


/* Announcements Container */
.announcements-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 25px;
    margin: 30px auto;
    max-width: 1400px;
    padding: 0 20px;
}

.left-section,
.right-section {
    width: 100%;
}

/* Common Styles for Both Announcements */
details {
    background: white;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid #eaeaea;
    margin-bottom: 15px;
    overflow: hidden;
    transition: all 0.3s ease;
}

details[open] {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
}

/* Summary Styles */
summary {
    list-style: none;
    padding: 18px 25px;
    cursor: pointer;
    font-weight: 600;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.3s ease;
    position: relative;
}

/* Hide default arrow */
summary::-webkit-details-marker {
    display: none;
}

.announcement-summary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.job-summary {
    background: linear-gradient(135deg, #4CAF50 0%, #388E3C 100%);
    color: white;
}

.summary-icon {
    font-size: 1.3rem;
}

.summary-text {
    flex-grow: 1;
}

.summary-arrow {
    font-size: 0.9rem;
    transition: transform 0.3s ease;
}

details[open] .summary-arrow {
    transform: rotate(180deg);
}

/* Hover effects */
summary:hover {
    opacity: 0.95;
}

/* Content Styles */
.announcement-content,
.job-content {
    padding: 0;
    animation: slideDown 0.4s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.announcement-header,
.job-header {
    padding: 20px 25px 10px;
    background: #f8f9fa;
}

.announcement-header h2,
.job-header h2 {
    margin: 0;
    color: #2c3e50;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.announcement-card,
.job-card {
    padding: 0 25px 25px;
}

/* Section Styles */
.section {
    margin: 20px 0;
}

.section h3 {
    color: #2c3e50;
    margin: 0 0 15px 0;
    font-size: 1.3rem;
}

.section h4 {
    color: #2c3e50;
    margin: 0 0 12px 0;
    font-size: 1.2rem;
}

/* Deadline Box */
.deadline-box {
    background: #f8f9fa;
    padding: 15px;
    border-radius: 8px;
    margin: 10px 0;
}

.deadline-box p {
    margin: 8px 0;
}

.highlight {
    color: #d32f2f;
    font-weight: 600;
    background: rgba(211, 47, 47, 0.1);
    padding: 8px 12px;
    border-radius: 6px;
    display: inline-block;
    margin-top: 10px;
}

/* Divider */
.divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, #e0e0e0, transparent);
    margin: 20px 0;
}

/* Benefits/Requirements Grid */
.benefits,
.requirements,
.benefits-list {
    display: grid;
    gap: 12px;
    margin: 15px 0;
}

.benefits {
    grid-template-columns: repeat(3, 1fr);
}

.requirements,
.benefits-list {
    grid-template-columns: repeat(2, 1fr);
}

.benefit-item,
.requirement,
.benefit {
    background: #f8f9fa;
    padding: 15px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s ease;
}

.benefit-item:hover,
.requirement:hover,
.benefit:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.benefit-icon,
.req-icon {
    font-size: 1.5rem;
}

/* Description */
.description {
    background: #e3f2fd;
    padding: 15px;
    border-radius: 8px;
    line-height: 1.6;
    margin: 15px 0;
    border-left: 4px solid #2196f3;
}

/* Details List */
.details {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
}

.details p {
    margin: 10px 0;
    padding-bottom: 10px;
    border-bottom: 1px solid #e0e0e0;
}

.details p:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

/* Tags */
.research-tags,
.focus-areas {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 15px 0;
}

.tag,
.area-tag {
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

.tag {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.area-tag {
    background: linear-gradient(135deg, #4CAF50 0%, #388E3C 100%);
    color: white;
}

/* Buttons */
.contact-btn,
.apply-btn,
.details-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 25px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    margin-right: 15px;
    margin-top: 10px;
}

.contact-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.apply-btn {
    background: linear-gradient(135deg, #d32f2f 0%, #b71c1c 100%);
    color: white;
}

.details-btn {
    background: transparent;
    color: #2c3e50;
    border: 2px solid #2c3e50;
}

.contact-btn:hover,
.apply-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.details-btn:hover {
    background: #2c3e50;
    color: white;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .announcements-container {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .announcements-container {
        padding: 0 15px;
    }
    
    summary {
        padding: 15px 20px;
        font-size: 1rem;
    }
    
    .announcement-header h2,
    .job-header h2 {
        font-size: 1.3rem;
    }
    
    .benefits {
        grid-template-columns: 1fr;
    }
    
    .requirements,
    .benefits-list {
        grid-template-columns: 1fr;
    }
    
    .section h3 {
        font-size: 1.2rem;
    }
    
    .section h4 {
        font-size: 1.1rem;
    }
    
    .announcement-card,
    .job-card {
        padding: 0 20px 20px;
    }
    
    .contact-btn,
    .apply-btn,
    .details-btn {
        display: block;
        margin: 10px 0;
        text-align: center;
    }
}

@media (max-width: 480px) {
    summary {
        flex-direction: column;
        text-align: center;
        gap: 8px;
    }
    
    .summary-icon {
        font-size: 1.5rem;
    }
}

/* =========================================== */
/* RESPONSIVE RESEARCH SECTION                 */
/* =========================================== */

@media (max-width: 768px) {
    .research-list li {
        padding: 15px;
        flex-direction: column;
        gap: 10px;
    }
    
    .research-list li i {
        font-size: 1.5rem;
        align-self: center;
    }
    
    .research-list li h3 {
        font-size: 1.1rem;
        text-align: center;
    }
    
    .research-list li p {
        text-align: center;
        font-size: 0.95rem;
    }
}

/* =========================================== */
/* RESPONSIVE ABOUT SECTION                    */
/* =========================================== */

@media (max-width: 768px) {
    #about p {
        padding: 20px;
        font-size: 1rem;
        line-height: 1.6;
    }
    
    #about p:first-of-type {
        font-size: 1.1rem;
    }
    
    /* Remove two-column layout on mobile */
    #about p {
        column-count: 1;
    ;
    }
    
    /* Adjust paragraph spacing */
    #about p br {
        margin: 10px 0;
    }
}

/* =========================================== */
/* RESPONSIVE CONTACT SECTION                  */
/* =========================================== */

@media (max-width: 768px) {
    #contact {
        padding: 50px 15px;
    }
    
    #contact h2 {
        font-size: 2rem;
        margin-bottom: 30px;
    }
    
    #contact > div {
        padding: 0 10px;
    }
    
    #contact > div > div {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    #contact > div > div > div {
        padding: 20px;
    }
    
    .location-link {
        padding: 8px 15px;
        font-size: 0.9rem;
    }
}


/* RESPONSIVE FOOTER                          */

@media (max-width: 768px) {
    footer {
        padding: 30px 15px;
    }
    
    .footer-content {
        gap: 15px;
        text-align: center;
    }
    
    .footer-content p {
        font-size: 0.9rem;
        line-height: 1.5;
    }
    
    .social-links {
        gap: 15px;
    }
    
    .social-links a {
        width: 35px;
        height: 35px;
        font-size: 0.9rem;
    }
}

/* =========================================== */
/* TOUCH DEVICE OPTIMIZATIONS                 */
/* =========================================== */

/* Larger touch targets for mobile */
@media (max-width: 768px) {
    .person-main,
    .nav-container a {
        min-height: 44px; /* Minimum touch target size */
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .close-btn::after {
        min-width: 44px;
        min-height: 44px;
    }
    
    .logo-wrapper {
        min-height: 60px;
        display: flex;
        align-items: center;
    }
}

/* Prevent text selection on interactive elements */
.person-main,
.faculty-card,
.student-card,
.btech-card,
.intern-card,
.nav-container a {
    user-select: none;
    -webkit-user-select: none;
}

/* Smooth scrolling for details */
.details-content {
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
}

/* =========================================== */
/* FIX FOR IOS SAFARI                         */
/* =========================================== */

@supports (-webkit-touch-callout: none) {
    .faculty-card:focus-within .person-details,
    .student-card:focus-within .person-details,
    .btech-card:focus-within .person-details,
    .intern-card:focus-within .person-details {
        max-height: -webkit-fill-available;
    }
}

/* =========================================== */
/* PRINT STYLES                               */
/* =========================================== */

@media print {
    .person-details,
    .faculty-card:focus-within .person-details,
    .student-card:focus-within .person-details,
    .btech-card:focus-within .person-details,
    .intern-card:focus-within .person-details {
        position: static !important;
        opacity: 1 !important;
        visibility: visible !important;
        transform: none !important;
        page-break-inside: avoid;
    }
    
    .faculty-card:focus-within::before,
    .student-card:focus-within::before,
    .btech-card:focus-within::before,
    .intern-card:focus-within::before {
        display: none;
    }
    
    .close-btn::after {
        display: none;
    }
}

/* =========================================== */
/* ACCESSIBILITY IMPROVEMENTS                 */
/* =========================================== */

/* High contrast mode support */
@media (prefers-contrast: high) {
    .person-details {
        border: 2px solid white;
    }
    
    .expertise-tag {
        border: 2px solid white;
    }
    
    .nav-container a {
        border: 1px solid white;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .faculty-card:focus-within .person-details,
    .student-card:focus-within .person-details,
    .btech-card:focus-within .person-details,
    .intern-card:focus-within .person-details {
        animation: none;
    }
}


.logo-wrapper {
        display: inline-block;
        text-decoration: none;
    }
    
    .logo-img {
        height: 200px;
        width: auto;
        filter: brightness(1);
        transition: filter 0.3s ease, transform 0.3s ease;
    }
    
    .logo-img:hover {
        filter: brightness(1.1);
        transform: scale(1.02);
    }
    
    /* Hide from sighted users, keep for screen readers */
    .visually-hidden {
        position: absolute;
        width: 1px;
        height: 1px;
        padding: 0;
        margin: -1px;
        overflow: hidden;
        clip: rect(0, 0, 0, 0);
        white-space: nowrap;
        border: 0;
    }
    
    /* Adjust header height if needed */
    .header-container {
        padding: 15px 0;
        min-height: 80px;
        display: flex;
        align-items: center;
    }


body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background-color: #f9fbfd;
    overflow-x: hidden;
}

/* Header & Navigation */
header {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-medium));
    color: var(--white);
    padding: 40px 20px 50px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.header-container {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    margin: 0 auto;
}

.logo-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    margin-bottom: 20px;
}

.logo {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--white), var(--secondary-light));
    display: flex;
    justify-content: center;
    align-items: center;
    border: 5px solid rgba(255, 255, 255, 0.3);
    box-shadow: var(--shadow);
}

.logo i.fa-brain {
    font-size: 3rem;
    color: var(--primary-dark);
}

.logo-text {
    font-size: 2.8rem;
    font-weight: 800;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
    letter-spacing: 1px;
}

.logo-subtext {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-top: 10px;
    letter-spacing: 1.5px;
}



nav {
    background-color: var(--secondary-dark);
    padding: 0;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

nav a {
    color: var(--white);
    padding: 18px 24px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: 0.5px;
    transition: var(--transition);
    position: relative;
    display: inline-block;
}

nav a:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background-color: var(--primary-light);
    transition: var(--transition);
}

nav a:hover::after {
    width: 80%;
}

/* Main Title Style */
#section-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    text-align: center;
    color: #2d3748;
    margin: 0 auto 50px;
    padding: 0 20px;
    position: relative;
    max-width: 800px;
    font-family: Georgia, 'Times New Roman', serif;
}


#section-title:before {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(90deg, 
        #4299e1 0%, 
        #38a169 50%, 
        #e53e3e 100%);
    border-radius: 2px;
    animation: lineGrow 1s ease-out;
}

@keyframes lineGrow {
    from {
        width: 0;
    }
    to {
        width: 100px;
    }
}

/* Add this for a subtle highlight */
#section-title span {
    position: relative;
    display: inline-block;
}

#section-title span:after {
    content: '';
    position: absolute;
    bottom: 5px;
    left: 0;
    width: 100%;
    height: 10px;
    background: rgba(66, 153, 225, 0.1);
    z-index: -1;
    transform: skewX(-15deg);
}

/* Enhanced About Section - Clean Version */
#about {
    padding: 80px 20px;
    background: 
        linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%),
        repeating-linear-gradient(
            45deg,
            transparent,
            transparent 10px,
            rgba(66, 153, 225, 0.02) 10px,
            rgba(66, 153, 225, 0.02) 20px
        );
    font-family: 'Georgia', 'Times New Roman', Times, serif;
}

#about .container {
    max-width: 900px;
    margin: 0 auto;
}

#about p {
    counter-increment: paragraph;
    font-size: 1.15rem;
    line-height: 1.8;
    color: #e10f0fdc;
    text-align: justify;
    padding: 40px 40px 40px 60px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.06);
    margin-bottom: 30px;
    position: relative;
    border-left: 4px solid #4299e1;
    animation: fadeInUp 0.8s ease-out;
    animation-fill-mode: both;
    transition: all 0.3s ease;
}

/* First paragraph special styling */
#about p:first-of-type {
    font-size: 1.25rem;
    line-height: 1.7;
    color: #131212;
    font-weight: 500;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    border-left: 4px solid #38a169;
    padding-left: 60px;
    padding-top: 60px;
}

#about p:first-of-type:before {
    content: '"';
    position: absolute;
    top: 20px;
    left: 20px;
    font-size: 3rem;
    color: rgba(12, 8, 6, 0.63);
    font-family: 'Times New Roman', Times, serif;
    font-weight: bold;
}

#about p:first-of-type:after {
    content: '"';
    position: absolute;
    bottom: 20px;
    right: 20px;
    font-size: 3rem;
    color: rgba(15, 15, 14, 0.788);
    font-family: 'Times New Roman', Times, serif;
    font-weight: bold;
}

/* Paragraph numbers */
#about p:before {
    content: counter(paragraph, decimal-leading-zero);
    position: absolute;
    left: 20px;
    top: 30px;
    font-size: 1.2rem;
    font-weight: bold;
    color: rgba(15, 15, 14, 0.3);
    font-family: 'Times New Roman', Times, serif;
}

/* Strong text styling */
#about strong {
    color: #4299e1;
    font-weight: 700;
    background: linear-gradient(90deg, #4299e1, #38a169);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    padding: 0 2px;
}

/* Line breaks styling */
#about p br {
    display: block;
    margin: 20px 0;
    content: "";
    height: 1px;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(231, 61, 14, 0.1) 20%, 
        rgba(66, 153, 225, 0.1) 80%, 
        transparent 100%);
}

/* Animation delays for paragraphs */
#about p:nth-child(2) { animation-delay: 0.1s; }
#about p:nth-child(3) { animation-delay: 0.2s; }

/* Hover effect */
#about p:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.08);
}

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

/* Responsive adjustments */
@media (max-width: 768px) {
    #about {
        padding: 50px 15px;
    }
    
    #about p {
        padding: 25px 25px 25px 45px;
        font-size: 1.05rem;
        line-height: 1.7;
        text-align: left;
    }
    
    #about p:first-of-type {
        font-size: 1.15rem;
        padding-top: 40px;
    }
    
    #about p br {
        margin: 15px 0;
    }
    
    #about p:before {
        left: 15px;
        top: 25px;
        font-size: 1rem;
    }
    
    #about p:first-of-type:before,
    #about p:first-of-type:after {
        font-size: 2rem;
    }
}

/* Two-column layout for large screens */
@media (min-width: 992px) {
    #about p {
        column-count: 2;
        column-gap: 40px;
        column-rule: 1px solid rgba(238, 86, 5, 0.1);
    }
    
    #about p:first-of-type {
        column-span: all;
    }
}

         /* Research Section Styles */
    .section {
        padding: 80px 20px;
    }
    
    .light {
        background-color: #f8fafc;
    }
    
    .container {
        max-width: 1200px;
        margin: 0 auto;
    }
    
    #research h2 {
        text-align: center;
        font-size: 2.5rem;
        color: #2d3748;
        margin-bottom: 50px;
        position: relative;
    }
    
    #research h2:after {
        content: '';
        position: absolute;
        bottom: -15px;
        left: 50%;
        transform: translateX(-50%);
        width: 100px;
        height: 4px;
        background: linear-gradient(90deg, #4299e1, #48bb78);
        border-radius: 2px;
    }
    
    .research-list {
        list-style: none;
        max-width: 800px;
        margin: 0 auto;
        padding: 0;
    }
    
    .research-list li {
        background: white;
        margin-bottom: 20px;
        padding: 25px 30px;
        border-radius: 12px;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        display: flex;
        align-items: flex-start;
        gap: 20px;
        transition: transform 0.3s ease, box-shadow 0.3s ease;
        border-left: 4px solid #4299e1;
    }
    
    .research-list li:hover {
        transform: translateY(-5px);
        box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    }
    
    .research-list li i {
        font-size: 1.8rem;
        color: #4299e1;
        margin-top: 5px;
        flex-shrink: 0;
    }
    
    .research-list li h3 {
        color: #2d3748;
        margin-bottom: 8px;
        font-size: 1.3rem;
    }
    
    .research-list li p {
        color: #718096;
        line-height: 1.6;
        margin: 0;
    }
    
    /* Responsive */
    @media (max-width: 768px) {
        .section {
            padding: 60px 20px;
        }
        
        #research h2 {
            font-size: 2rem;
        }
        
        .research-list li {
            padding: 20px;
            flex-direction: column;
            gap: 15px;
        }
        
        .research-list li i {
            font-size: 1.5rem;
        }
    }

/* Main Content Sections */
.section {
    padding: 80px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    color: var(--primary-dark);
    margin-bottom: 50px;
    text-align: center;
    font-size: 2.5rem;
    position: relative;
    padding-bottom: 15px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(to right, var(--primary-light), var(--primary-dark));
    border-radius: 2px;
}

/* Row Layout */
.row {
    margin-bottom: 60px;
}

.row-title {
    color: var(--primary-dark);
    margin-bottom: 25px;
    font-size: 1.8rem;
    padding-left: 10px;
    border-left: 4px solid var(--primary-light);
}



/* PURE CSS CLICK-TO-OPEN (NO HTML CHANGES)   */


/* First, disable the hover effect completely */
.faculty-card:hover .person-details,
.student-card:hover .person-details,
.btech-card:hover .person-details,
.intern-card:hover .person-details {
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
}

/* Make the entire card clickable and focusable */
.faculty-card,
.student-card,
.btech-card,
.intern-card {
    position: relative;
    cursor: pointer;
    outline: none;
}

/* Remove default outline and add custom focus */
.faculty-card:focus,
.student-card:focus,
.btech-card:focus,
.intern-card:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.5);
    border-radius: var(--border-radius);
}

/* When card gets focus (via click or tab), show details */
.faculty-card:focus-within .person-details,
.student-card:focus-within .person-details,
.btech-card:focus-within .person-details,
.intern-card:focus-within .person-details {
    opacity: 1 !important;
    visibility: visible !important;
    transform: translateY(0) !important;
    z-index: 1000 !important;
}

/* Position details as overlay when focused */
.faculty-card:focus-within .person-details,
.student-card:focus-within .person-details,
.btech-card:focus-within .person-details,
.intern-card:focus-within .person-details {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) !important;
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    z-index: 1001;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-medium));
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    overflow-y: auto;
    animation: modalFadeIn 0.3s ease-out;
}

/* Add overlay background when any card is focused */
.faculty-card:focus-within::before,
.student-card:focus-within::before,
.btech-card:focus-within::before,
.intern-card:focus-within::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    pointer-events: none;
}

/* Add a close button using pseudo-element */
.faculty-card:focus-within .person-details::after,
.student-card:focus-within .person-details::after,
.btech-card:focus-within .person-details::after,
.intern-card:focus-within .person-details::after {
    content: '×';
    position: fixed;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border-radius: 50%;
    font-size: 28px;
    line-height: 40px;
    text-align: center;
    cursor: pointer;
    z-index: 1002;
    transition: background-color 0.3s ease;
}

.faculty-card:focus-within .person-details:hover::after,
.student-card:focus-within .person-details:hover::after,
.btech-card:focus-within .person-details:hover::after,
.intern-card:focus-within .person-details:hover::after {
    background: rgba(255, 255, 255, 0.3);
}

/* Click outside to close - tricky without JS, but we can use focus tricks */
/* We'll make a hidden overlay that can be clicked to remove focus */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: transparent;
    z-index: 999;
    pointer-events: none;
}

.faculty-card:focus-within ~ body::after,
.student-card:focus-within ~ body::after,
.btech-card:focus-within ~ body::after,
.intern-card:focus-within ~ body::after {
    pointer-events: auto;
    cursor: pointer;
}

/* Animation for modal appearance */
@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: translate(-50%, -50%) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1);
    }
}

/* Make all interactive elements inside the card focusable */
.person-main {
    cursor: pointer;
    outline: none;
}

.person-main:focus {
    outline: none;
}

/* Style for mobile */
@media (max-width: 768px) {
    .faculty-card:focus-within .person-details,
    .student-card:focus-within .person-details,
    .btech-card:focus-within .person-details,
    .intern-card:focus-within .person-details {
        width: 95%;
        max-height: 85vh;
        padding: 20px;
    }
    
    .faculty-card:focus-within .person-details::after,
    .student-card:focus-within .person-details::after,
    .btech-card:focus-within .person-details::after,
    .intern-card:focus-within .person-details::after {
        top: 10px;
        right: 10px;
        width: 35px;
        height: 35px;
        font-size: 24px;
        line-height: 35px;
    }
}

/* Add click/tap indicator */
.faculty-card::before,
.student-card::before,
.btech-card::before,
.intern-card::before {
    position: absolute;
    bottom: 10px;
    right: 10px;
    font-size: 0.75rem;
    color: var(--primary-light);
    background: rgba(255, 255, 255, 0.9);
    padding: 3px 8px;
    border-radius: 10px;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    z-index: 5;
}

.faculty-card:hover::before,
.student-card:hover::before,
.btech-card:hover::before,
.intern-card:hover::before {
    opacity: 1;
}

/* Hide the indicator when focused */
.faculty-card:focus-within::before,
.student-card:focus-within::before,
.btech-card:focus-within::before,
.intern-card:focus-within::before {
    opacity: 0;
}

/* Prevent scrolling when modal is open */
.faculty-card:focus-within,
.student-card:focus-within,
.btech-card:focus-within,
.intern-card:focus-within {
    position: relative;
}

/* Add this to prevent body scrolling (partial solution) */
.faculty-card:focus-within ~ *,
.student-card:focus-within ~ *,
.btech-card:focus-within ~ *,
.intern-card:focus-within ~ * {
    filter: blur(1px);
    transition: filter 0.3s ease;
}

/* Restore details content scrolling */
.faculty-card:focus-within .details-content,
.student-card:focus-within .details-content,
.btech-card:focus-within .details-content,
.intern-card:focus-within .details-content {
    max-height: 70vh;
    overflow-y: auto;
    padding-right: 10px;
}

/* Custom scrollbar for details */
.faculty-card:focus-within .details-content::-webkit-scrollbar,
.student-card:focus-within .details-content::-webkit-scrollbar,
.btech-card:focus-within .details-content::-webkit-scrollbar,
.intern-card:focus-within .details-content::-webkit-scrollbar {
    width: 6px;
}

.faculty-card:focus-within .details-content::-webkit-scrollbar-track,
.student-card:focus-within .details-content::-webkit-scrollbar-track,
.btech-card:focus-within .details-content::-webkit-scrollbar-track,
.intern-card:focus-within .details-content::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
}

.faculty-card:focus-within .details-content::-webkit-scrollbar-thumb,
.student-card:focus-within .details-content::-webkit-scrollbar-thumb,
.btech-card:focus-within .details-content::-webkit-scrollbar-thumb,
.intern-card:focus-within .details-content::-webkit-scrollbar-thumb {
    background: var(--primary-light);
    border-radius: 3px;
}

/* Fix for touch devices */
@media (hover: none) and (pointer: coarse) {
    .faculty-card::before,
    .student-card::before,
    .btech-card::before,
    .intern-card::before {
        opacity: 0.8;
        font-size: 0.7rem;
    }
    
    .faculty-card:focus-within .person-details,
    .student-card:focus-within .person-details,
    .btech-card:focus-within .person-details,
    .intern-card:focus-within .person-details {
        touch-action: pan-y;
    }
}

/* Add visual feedback on click */
@keyframes clickPulse {
    0% { transform: scale(1); }
    50% { transform: scale(0.98); }
    100% { transform: scale(1); }
}

.faculty-card:active,
.student-card:active,
.btech-card:active,
.intern-card:active {
    animation: clickPulse 0.2s ease;
}


/* People Container Layout */
.people-container {
    display: grid;
    gap: 30px;
}

/* Faculty Row - Single Card (No Scroll) */
.faculty-row .people-container {
    grid-template-columns: 1fr;
    max-width: 800px;
    margin: 0 auto;
}

/* PhD & M.Tech Row - Side by Side (No Scroll) */
.phd-mtech-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.phd-mtech-row .student-group .people-container {
    grid-template-columns: 1fr; /* Only 1 card per group */
}

.student-group {
    display: flex;
    flex-direction: column;
}

/* B.Tech Row - Grid Layout (No Scroll) */
.btech-row .people-container {
    grid-template-columns: repeat(3, 1fr);
}

/* Interns Row - Grid Layout (No Scroll) */
.interns-row .people-container {
    grid-template-columns: repeat(4, 1fr);
}

/* Card Styles */
.faculty-card, .student-card, .btech-card, .intern-card {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid #e1e5e9;
    position: relative;
    height: 100%;
    min-height: 350px; /* Fixed height for consistency */
}

.faculty-card:hover, .student-card:hover, .btech-card:hover, .intern-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

/* Faculty Card Special Styling */
.faculty-card {
    min-height: 400px; /* Slightly taller for faculty */
    border: 2px solid var(--primary-light);
}

/* Person Main Info */
.person-main {
    padding: 25px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    height: 100%;
}

.person-image {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    overflow: hidden;
    margin-bottom: 20px;
    border: 4px solid var(--primary-light);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.student-card .person-image,
.btech-card .person-image,
.intern-card .person-image {
    width: 130px;
    height: 130px;
}

.person-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.faculty-card:hover .person-image img,
.student-card:hover .person-image img,
.btech-card:hover .person-image img,
.intern-card:hover .person-image img {
    transform: scale(1.05);
}

.person-basic-info h4 {
    color: var(--primary-dark);
    margin-bottom: 8px;
    font-size: 1.3rem;
}

.student-card .person-basic-info h4,
.btech-card .person-basic-info h4,
.intern-card .person-basic-info h4 {
    font-size: 1.2rem;
}

.person-basic-info p {
    color: var(--text-medium);
    margin-bottom: 5px;
    font-size: 0.95rem;
}

.department, .research-institute, .project, .university {
    color: var(--primary-medium) !important;
    font-weight: 600;
    font-size: 1rem !important;
    margin-top: 5px;
    font-family: 'Segoe UI Semibold', Tahoma, Geneva, Verdana, sans-serif;
}

/* Hover Details */
.person-details {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-medium));
    color: var(--white);
    padding: 25px;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    transform: translateY(10px);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    overflow-y: auto; /* Allow scrolling only inside details */
}

/* Remove max-height to prevent scroll in main card */
.faculty-card .person-details,
.student-card .person-details,
.btech-card .person-details,
.intern-card .person-details {
    max-height: 100%;
}

.faculty-card:hover .person-details,
.student-card:hover .person-details,
.btech-card:hover .person-details,
.intern-card:hover .person-details {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.details-content {
    width: 100%;
    max-height: 100%;
    overflow-y: auto;
    padding-right: 5px; /* Space for scrollbar */
}

/* Custom scrollbar for details */
.details-content::-webkit-scrollbar {
    width: 4px;
}

.details-content::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
}

.details-content::-webkit-scrollbar-thumb {
    background: var(--primary-light);
    border-radius: 2px;
}

.details-content h4 {
    color: var(--white);
    margin-bottom: 15px;
    font-size: 1.4rem;
    border-bottom: 2px solid rgba(255, 255, 255, 0.2);
    padding-bottom: 10px;
}

.student-card .details-content h4,
.btech-card .details-content h4,
.intern-card .details-content h4 {
    font-size: 1.3rem;
}

.details-content p {
    margin-bottom: 15px;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.9);
}

/* Expertise Tags */
.expertise {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 15px 0;
}

.expertise-tag {
    background: rgba(255, 255, 255, 0.15);
    color: var(--white);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    border: 1px solid rgba(255, 255, 255, 0.3);
}


 /* Publications Section Styles */
    #publications {
        background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    }
    
    .section-subtitle {
        text-align: center;
        color: #4a5568;
        font-size: 1.1rem;
        margin-bottom: 50px;
        font-style: italic;
    }
    
    .publications-list {
        max-width: 900px;
        margin: 0 auto 50px;
    }
    
    .publication-year {
        margin-bottom: 40px;
    }
    
    .publication-year h3 {
        color: #2d3748;
        font-size: 1.8rem;
        margin-bottom: 20px;
        padding-bottom: 10px;
        border-bottom: 2px solid #cbd5e0;
    }
    
    .publications-list ul {
        list-style: none;
        padding: 0;
        margin: 0;
    }
    
    .publications-list li {
        background: white;
        margin-bottom: 15px;
        padding: 20px;
        border-radius: 8px;
        box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
        transition: all 0.3s ease;
        border-left: 4px solid #4299e1;
    }
    
    .publications-list li:hover {
        transform: translateX(5px);
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    }
    
    .pub-item {
        display: flex;
        flex-wrap: wrap;
        align-items: flex-start;
        gap: 10px;
    }
    
    .pub-authors {
        color: #4a5568;
        font-weight: 500;
        flex-basis: 100%;
        margin-bottom: 5px;
    }
    
    .pub-title {
        color: #2d3748;
        font-weight: 600;
        flex: 1;
        font-style: italic;
    }
    
    .pub-venue {
        color: #718096;
        background: #edf2f7;
        padding: 4px 12px;
        border-radius: 20px;
        font-size: 0.9rem;
        white-space: nowrap;
    }
    
    .pub-link {
        color: #e53e3e;
        text-decoration: none;
        font-size: 1.2rem;
        transition: color 0.3s ease;
    }
    
    .pub-link:hover {
        color: #c53030;
    }
    
    .view-all {
        text-align: center;
        margin-top: 40px;
    }
    
    .button {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        background: #2d3748;
        color: white;
        padding: 12px 30px;
        border-radius: 30px;
        text-decoration: none;
        font-weight: 600;
        transition: all 0.3s ease;
    }
    
    .button:hover {
        background: #4a5568;
        transform: translateY(-2px);
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    }
    
    /* Responsive */
    @media (max-width: 768px) {
        .pub-item {
            flex-direction: column;
            gap: 8px;
        }
        
        .pub-venue {
            align-self: flex-start;
        }
        
        .pub-link {
            align-self: flex-end;
        }
    }

/* Contact Info in Details */
.contact-info {
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.contact-info p {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.contact-info i {
    color: var(--primary-light);
    width: 20px;
}

/* Footer */
footer {
    background-color: var(--secondary-dark);
    color: var(--white);
    text-align: center;
    padding: 30px 20px;
    margin-top: 60px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.social-links {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
}

.social-links a {
    color: var(--white);
    background: rgba(255, 255, 255, 0.1);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    text-decoration: none;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary-light);
    transform: translateY(-3px);
}

/* Responsive Design */
/* Laptop/Tablet */
@media (max-width: 1024px) {
    .section {
        padding: 60px 20px;
    }
    
    .section-title {
        font-size: 2.2rem;
    }
    
    /* Adjust grid layouts for tablet */
    .phd-mtech-row {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .btech-row .people-container {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .interns-row .people-container {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .person-image {
        width: 130px;
        height: 130px;
    }
    
    .student-card .person-image,
    .btech-card .person-image,
    .intern-card .person-image {
        width: 120px;
        height: 120px;
    }
}

/* Tablet */
@media (max-width: 768px) {
    .section-title {
        font-size: 2rem;
    }
    
    .row-title {
        font-size: 1.6rem;
    }
    
/* CSS Only - Responsive Navigation */
nav {
    background: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 15px 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
}

.nav-container a {
    text-decoration: none;
    color: #4ecdc4;
    font-weight: 600;
    font-size: 1.1rem;
    padding: 8px 0;
    position: relative;
    transition: color 0.3s ease;
}

.nav-container a:hover {
    color: #4299e1;
}

.nav-container a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: #4299e1;
    transition: width 0.3s ease;
}

.nav-container a:hover::after {
    width: 100%;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 0;
        padding: 0;
        display: none; /* Hidden by default on mobile */
    }
    
    nav:focus-within .nav-container,
    nav:hover .nav-container {
        display: flex;
    }
    
    .nav-container a {
        padding: 15px 20px;
        border-bottom: 1px solid #e2e8f0;
        width: 100%;
        text-align: center;
        font-size: 1.2rem;
    }
    
    .nav-container a:hover {
        background: #f7fafc;
    }
    
    .nav-container a:last-child {
        border-bottom: none;
    }
    
    /* Add hamburger menu indicator */
    nav::before {
        content: '☰ Menu';
        display: block;
        text-align: center;
        font-weight: 600;
        color: #f9fafc;
        padding: 15px;
        cursor: pointer;
        font-size: 1.1rem;
    }
    
    nav:hover::before,
    nav:focus::before {
        content: '✕ Close';
    }
}

    .nav-container {
        flex-direction: column;
        align-items: center;
    }
    
    nav a {
        padding: 15px;
        width: 100%;
        text-align: center;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    nav a:last-child {
        border-bottom: none;
    }
    
    .logo-container {
        flex-direction: column;
        gap: 15px;
    }
    
    .logo-text {
        font-size: 2.2rem;
    }
    
    /* Single column layout for all rows on tablet */
    .btech-row .people-container,
    .interns-row .people-container {
        grid-template-columns: 1fr;
    }
    
    .person-main {
        padding: 20px;
    }
    
    .person-image {
        width: 120px;
        height: 120px;
    }
    
    .person-basic-info h4 {
        font-size: 1.2rem;
    }
}

/* Mobile Phones */
@media (max-width: 600px) {
    .section {
        padding: 40px 15px;
    }
    
    .section-title {
        font-size: 1.8rem;
        margin-bottom: 30px;
    }
    
    .row {
        margin-bottom: 40px;
    }
    
    .row-title {
        font-size: 1.4rem;
        margin-bottom: 20px;
    }
    
    header {
        padding: 30px 15px 40px;
    }
    
    .logo {
        width: 100px;
        height: 100px;
    }
    
    .logo i.fa-brain {
        font-size: 2.5rem;
    }
    
    .logo-text {
        font-size: 2rem;
    }
    
    /* Single column layout for all rows on mobile */
    .faculty-row .people-container,
    .phd-mtech-row .student-group .people-container,
    .btech-row .people-container,
    .interns-row .people-container {
        grid-template-columns: 1fr;
    }
    
    .phd-mtech-row {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .person-main {
        flex-direction: row;
        text-align: left;
        gap: 20px;
        align-items: center;
    }
    
    .person-image {
        width: 100px;
        height: 100px;
        margin-bottom: 0;
        flex-shrink: 0;
    }
    
    .person-basic-info {
        text-align: left;
    }
    
    .person-details {
        padding: 20px;
    }
    
    .details-content h4 {
        font-size: 1.2rem;
    }
    
    .details-content p {
        font-size: 0.9rem;
    }
    
    .expertise-tag {
        font-size: 0.8rem;
        padding: 4px 10px;
    }
    
    .contact-info p {
        font-size: 0.85rem;
    }
}

/* Small Mobile Phones */
@media (max-width: 400px) {
    .section-title {
        font-size: 1.6rem;
    }
    
    .row-title {
        font-size: 1.3rem;
    }
    
    .person-main {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .person-image {
        width: 90px;
        height: 90px;
    }
    
    .person-basic-info h4 {
        font-size: 1.1rem;
    }
    
    .person-basic-info p {
        font-size: 0.9rem;
    }
    
    .logo-text {
        font-size: 1.8rem;
    }
    
    .logo-subtext {
        font-size: 1rem;
    }
    
    .faculty-card,
    .student-card,
    .btech-card,
    .intern-card {
        min-height: 320px;
    }
}


/* Publications Section Styles */
    #publications {
        background: #f8fafc;
    }
    
    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 20px;
    }
    
    #publications h2 {
        text-align: center;
        font-size: 2.5rem;
        color: #2d3748;
        margin-bottom: 15px;
    }
    
    .section-subtitle {
        text-align: center;
        color: #718096;
        margin-bottom: 50px;
        font-size: 1.1rem;
    }
    
    .publication-category {
        margin-bottom: 60px;
    }
    
    .publication-category h3 {
        color: #2d3748;
        font-size: 1.8rem;
        margin-bottom: 30px;
        padding-bottom: 10px;
        border-bottom: 2px solid #cbd5e0;
        display: flex;
        align-items: center;
        gap: 10px;
    }
    
    .publication-list {
        counter-reset: pub-counter;
    }
    
    .publication-item {
        position: relative;
        margin-bottom: 25px;
        padding: 20px;
        background: white;
        border-radius: 10px;
        box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
        transition: transform 0.3s ease, box-shadow 0.3s ease;
    }
    
    .publication-item:hover {
        transform: translateY(-3px);
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    }
    
    .journal {
        border-left: 4px solid #3498db;
    }
    
    .conference {
        border-left: 4px solid #e74c3c;
    }
    
    .pub-number {
        position: absolute;
        left: -15px;
        top: 50%;
        transform: translateY(-50%);
        width: 30px;
        height: 30px;
        background: #2d3748;
        color: white;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-weight: bold;
        font-size: 0.9rem;
    }
    
    .pub-content {
        padding-left: 20px;
    }
    
    .pub-title {
        color: #4a5568;
        font-size: 1rem;
        line-height: 1.6;
        margin-bottom: 10px;
    }
    
    .pub-title strong {
        color: #2d3748;
    }
    
    .pub-title em {
        color: #2d3748;
        font-style: italic;
    }
    
    .pub-venue {
        color: #3498db;
        font-weight: 500;
    }
    
    .pub-metrics {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        margin-top: 10px;
    }
    
    .impact-factor, .quartile, .award, .conference-type, .paper-type {
        padding: 4px 12px;
        border-radius: 20px;
        font-size: 0.85rem;
        font-weight: 500;
    }
    
    .impact-factor {
        background:  #4299e1;
        color: white;
    }
    
    .quartile {
        color: white;
    }
    
    .q1 {
        background: #e74c3c;
    }
    
    .q2 {
        background: #f39c12;
    }
    
    .award {
        background: #f39c12;
        color: white;
    }
    
    .conference-type {
        background: #8e44ad;
        color: white;
    }
    
    .paper-type {
        background: #3498db;
        color: white;
    }
    
    .publication-stats {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 30px;
        margin-top: 60px;
        text-align: center;
    }
    
    .stat-item {
        padding: 25px;
        background: white;
        border-radius: 10px;
        box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
    }
    
    .stat-number {
        font-size: 2.5rem;
        font-weight: bold;
        color: #3498db;
        margin-bottom: 10px;
    }
    
    .stat-label {
        color: #4a5568;
        font-size: 1.1rem;
    }
    
    /* Responsive Design */
    @media (max-width: 768px) {
        .publication-item {
            padding: 15px;
        }
        
        .pub-number {
            position: static;
            display: inline-block;
            margin-bottom: 10px;
            transform: none;
            width: 25px;
            height: 25px;
        }
        
        .pub-content {
            padding-left: 0;
        }
        
        .publication-stats {
            grid-template-columns: repeat(2, 1fr);
        }
    }
    
    @media (max-width: 480px) {
        .publication-stats {
            grid-template-columns: 1fr;
        }
        
        .pub-metrics {
            flex-direction: column;
            align-items: flex-start;
        }
    }

    .location-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: #3498db;
    color: white;
    padding: 10px 20px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}


/* Common Contact Card Styles */
/* =========================================== */
/* FIXED CONTACT SECTION - SIDE BY SIDE CARDS */
/* =========================================== */

/* =========================================== */
/* CONTACT SECTION - SIMPLE SIDE-BY-SIDE       */
/* =========================================== */

#contact {
    padding: 80px 20px;
    background: var(--light-bg);
}

#contact .container {
    max-width: 1200px;
    margin: 0 auto;
}

#contact h2 {
    text-align: center;
    font-size: 2.5rem;
    color: var(--primary-dark);
    margin-bottom: 50px;
    position: relative;
}

#contact h2:after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-light), var(--primary-medium));
    border-radius: 2px;
}

/* Contact Cards - Side by Side */
.contact-cards {
    display: flex;
    justify-content: center;
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

/* Each Contact Card */
.contact-card {
    flex: 1;
    background: white;
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    min-height: 220px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border: 2px solid transparent;
}

.contact-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
    border-color: var(--primary-light);
}

/* Card Icon */
.card-icon {
    font-size: 3rem;
    color: var(--primary-medium);
    margin-bottom: 20px;
}

/* Card Title */
.card-title {
    color: var(--primary-dark);
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 10px;
}

/* Card Description */
.card-desc {
    color: var(--text-medium);
    font-size: 1rem;
    line-height: 1.5;
}

/* Hidden Details - Appear on Hover */
.card-details {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-medium));
    color: white;
    padding: 30px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.4s ease;
    border-radius: 12px;
    text-align: center;
}

.contact-card:hover .card-details {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* Details Icon */
.details-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--primary-light);
}

/* Details Title */
.details-title {
    color: white;
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 20px;
    text-align: center;
}

/* Details Content */
.details-content {
    color: rgba(255, 255, 255, 0.95);
    font-size: 1.1rem;
    line-height: 1.6;
    text-align: center;
    width: 100%;
}

/* Specific Styles for Each Card */
.location-details {
    font-weight: 500;
}

.phone-details {
    font-size: 1.3rem;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.1);
    padding: 10px 20px;
    border-radius: 8px;
    margin: 10px 0;
    letter-spacing: 1px;
}

.email-details {
    color: var(--primary-light);
    font-weight: 500;
    word-break: break-word;
    padding: 10px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    margin: 10px 0;
    width: 100%;
}

/* Action Button */
.details-action {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: rgba(255, 255, 255, 0.15);
    color: white;
    padding: 12px 25px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 500;
    margin-top: 20px;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.details-action:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

/* Responsive Design */
@media (max-width: 768px) {
    #contact {
        padding: 60px 20px;
    }
    
    #contact h2 {
        font-size: 2rem;
        margin-bottom: 40px;
    }
    
    .contact-cards {
        flex-direction: column;
        max-width: 500px;
        gap: 25px;
    }
    
    .contact-card {
        min-height: 200px;
        padding: 25px;
    }
    
    .card-details {
        padding: 25px;
    }
    
    .card-icon {
        font-size: 2.5rem;
    }
    
    .details-icon {
        font-size: 2rem;
    }
    
    .card-title {
        font-size: 1.3rem;
    }
    
    .details-title {
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    .contact-card {
        min-height: 180px;
        padding: 20px;
    }
    
    .card-details {
        padding: 20px;
    }
    
    .card-icon {
        font-size: 2.2rem;
    }
    
    .details-icon {
        font-size: 1.8rem;
    }
    
    .card-title {
        font-size: 1.2rem;
    }
    
    .phone-details {
        font-size: 1.2rem;
    }
    
    .email-details {
        font-size: 1rem;
    }
}

/* Patents Section */
        .patent-card {
            background: white;
            border-radius: 10px;
            padding: 25px;
            margin-bottom: 25px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            position: relative;
            border-left: 4px solid #e74c3c;
        }
        
        .patent-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.12);
        }
        
        .patent-id {
            color: #e74c3c;
            font-weight: 700;
            margin-bottom: 10px;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .patent-title {
            font-size: 1.4rem;
            font-weight: 700;
            color: #2c3e50;
            margin-bottom: 15px;
            line-height: 1.3;
        }
        
        .patent-inventors {
            color: #666;
            margin-bottom: 15px;
            font-size: 1rem;
        }
        
        .patent-inventor-highlight {
            font-weight: 600;
            color: #e74c3c;
        }
        
        .patent-abstract {
            color: #555;
            line-height: 1.6;
            margin-bottom: 20px;
        }
        
        .patent-details {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            margin-bottom: 20px;
        }
        
        .detail-item {
            display: flex;
            align-items: center;
            gap: 8px;
            color: #666;
            font-size: 0.9rem;
        }
        
        .detail-item i {
            color: #e74c3c;
        }
        
        .patent-status {
            display: inline-block;
            padding: 5px 15px;
            background: #d4edda;
            color: #155724;
            border-radius: 20px;
            font-weight: 600;
            font-size: 0.85rem;
        }
        
        .patent-links {
            display: flex;
            gap: 15px;
            margin-top: 20px;
            padding-top: 20px;
            border-top: 1px solid #eee;
        }
        
        /* Stats Section */
        .stats-section {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin: 60px 0;
        }
        
        .stat-card {
            background: white;
            border-radius: 10px;
            padding: 30px;
            text-align: center;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            transition: transform 0.3s ease;
        }
        
        .stat-card:hover {
            transform: translateY(-5px);
        }
        
        .stat-number {
            font-size: 3rem;
            font-weight: 800;
            color: #3498db;
            display: block;
            margin-bottom: 10px;
        }
        
        .stat-label {
            color: #666;
            font-size: 1.1rem;
            font-weight: 600;
        }
        
        /* Responsive Design */
        @media (max-width: 768px) {
            .publications-header h1 {
                font-size: 2.2rem;
            }
            
            .tab-btn {
                padding: 10px 20px;
                font-size: 1rem;
            }
            
            .paper-title, .patent-title {
                font-size: 1.2rem;
            }
            
            .paper-links, .patent-links {
                flex-direction: column;
                gap: 10px;
            }
            
            .stats-section {
                grid-template-columns: 1fr;
            }
        }
        
        /* Animation */
        .paper-card, .patent-card, .stat-card {
            animation: fadeInUp 0.6s ease;
        }
        
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        /* section title for patent */