/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

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

/* Responsive Container */
@media (max-width: 1240px) {
    .container {
        max-width: 95%;
        padding: 0 15px;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 10px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 8px;
    }
}

/* Navigation */
.navbar {
    background: rgba(255, 255, 255, 0.425) !important;
    position: fixed;
    top: 15px;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 20px);
    max-width: 1400px;
    backdrop-filter: none;
    border-radius: 20px;
    transition: all 0.3s ease;
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .navbar {
        top: 10px;
        width: calc(100% - 10px);
        border-radius: 15px;
        background: rgba(255, 255, 255, 0.425) !important;
        border: 2px solid rgba(0, 0, 0, 0.2);
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    }
    
    .nav-container {
        padding: 0.8rem 15px;
    }
    
    .nav-menu {
        position: fixed;
        top: 60px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: #ffffff46 !important;
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: 2rem;
        margin-top: 5px;
        transition: left 0.3s ease;
        border-radius: 10px 10px;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
        border: 2px solid rgba(0, 0, 0, 0.15);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li {
        margin: 1rem 0;
    }
    
    .hamburger {
        display: flex;
    }
}



.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    z-index: 2;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.logo-text {
    font-size: 1.2rem;
    font-weight: 700;
    color: #2563eb;
}

.nav-menu {
    display: flex;
    font-size: 14px;
    list-style: none;
    gap: 1.5rem;
}

.nav-menu a{
    color: rgba(0, 0, 0, 0.764);
}

/* a{
    color: rgba(0, 0, 0, 0.459) !important;
} */

.dropdown {
    position: relative;
}

.dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    min-width: 180px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    padding: 0.5rem 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-link {
    display: block;
    padding: 0.5rem 1rem;
    color: #333;
    text-decoration: none;
    transition: background-color 0.3s ease;
}

.dropdown-link:hover {
    background-color: #f8fafc;
    color: #2563eb;
}

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #ffffff !important;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #ffffff;
    transition: width 0.3s ease;
}

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 5px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 2px;
}

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

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

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

/* Hero Section */
.hero {
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 20px;
}

/* Responsive Hero */
@media (max-width: 768px) {
    .hero {
        height: 100vh;
        padding: 0 15px;
    }
}

@media (max-width: 480px) {
    .hero {
        height: 100vh;
        padding: 0 10px;
    }
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100vw;          /* full viewport width */
    height: 100vh;         /* full viewport height */
    object-fit: cover;     /* fill and crop video to fit */
    z-index: -1;
}
.hero-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(59, 130, 246, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59, 130, 246, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite;
}

.hero-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 20% 80%, rgba(59, 130, 246, 0.2) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.2) 0%, transparent 50%);
}



@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

@keyframes floatImage {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
}



.hero-content {
    z-index: 1;
    color: rgb(245, 243, 243);
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 0 2rem;
    gap: 4rem;
    animation: fadeInUp 1s ease-out;
}

/* Responsive Hero Content */
@media (max-width: 1024px) {
    .hero-content {
        gap: 2rem;
        padding: 0 1.5rem;
    }
}

@media (max-width: 768px) {
    .hero-content {
        flex-direction: column;
        text-align: center;
        gap: 2rem;
        padding: 0 1rem;
    }
}

@media (max-width: 480px) {
    .hero-content {
        gap: 1.5rem;
        padding: 0 0.5rem;
    }
}

.hero-text {
    flex: 1;
    text-align: left;
}

.hero-photo {
    flex-shrink: 0;
    animation: fadeIn 1s ease-out 0.3s both;
}

.profile-image {
    width: 180px;
    height: 180px;
    border-radius: 20px; /* rounded corners */
    object-fit: cover;
    border: 2px solid #fff;
}

.hero-title {
    margin-bottom: 1rem;
}

.hero-name {
    display: block;
    font-size: 4.8rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    animation: slideInLeft 1s ease-out 0.2s both;
    line-height: 1.1;
}

.hero-subtitle {
    display: block;
    font-size: 1.2rem;
    font-weight: 300;
    opacity: 0.9;
    animation: slideInRight 1s ease-out 0.4s both;
    line-height: 1.4;
}

/* Responsive Hero Text */
@media (max-width: 1024px) {
    .hero-name {
        font-size: 3.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
}

@media (max-width: 768px) {
    .hero-name {
        font-size: 2.8rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .hero-name {
        font-size: 2.2rem;
    }
    
    .hero-subtitle {
        font-size: 0.9rem;
    }
}

.hero-description {
    font-size: 1rem;
    margin-bottom: 2rem;
    opacity: 0.8;
    animation: fadeIn 1s ease-out 0.6s both;
}

.hero-buttons {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 1rem;
    animation: fadeInUp 1s ease-out 0.8s both;
    flex-wrap: wrap;
}

/* Responsive Hero Buttons */
@media (max-width: 768px) {
    .hero-buttons {
        justify-content: center;
        flex-direction: column;
        gap: 0.8rem;
    }
}

@media (max-width: 480px) {
    .hero-buttons {
        gap: 0.6rem;
    }
}

.cta-button {
    display: inline-block;
    padding: 12px 30px;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    font-weight: 500;
    transition: all 0.3s ease;
}
html { scroll-behavior: smooth; }


.cta-button:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 30px;
    justify-content: flex-start;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease-out 1s both;
}

/* Responsive Social Links */
@media (max-width: 768px) {
    .social-links {
        justify-content: center;
        margin-top: 20px;
    }
}

@media (max-width: 480px) {
    .social-links {
        gap: 0.8rem;
        margin-top: 15px;
    }
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    text-decoration: none;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.3);
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.scroll-indicator {
    position: absolute;
    bottom: 15px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid white;
    border-bottom: 2px solid white;
    transform: rotate(45deg);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

/* Section Styles */
section {
    padding: 100px 0;
    position: relative;
    overflow: hidden;
}

/* Responsive Section Padding */
@media (max-width: 1024px) {
    section {
        padding: 80px 0;
    }
}

@media (max-width: 768px) {
    section {
        padding: 60px 0;
    }
}

@media (max-width: 480px) {
    section {
        padding: 40px 0;
    }
}

/* Floating Background Elements */
.about::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><text y=".9em" font-size="15" fill="%232563eb" opacity="0.05">⚡</text></svg>') repeat;
    background-size: 80px 80px;
    animation: float 25s linear infinite;
}

.education::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><text y=".9em" font-size="12" fill="%236b7280" opacity="0.03">🔌</text></svg>') repeat;
    background-size: 120px 120px;
    animation: float 30s linear infinite reverse;
}

.research::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><text y=".9em" font-size="18" fill="%232563eb" opacity="0.04">🔬</text></svg>') repeat;
    background-size: 90px 90px;
    animation: float 35s linear infinite;
}

.projects::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><text y=".9em" font-size="14" fill="%236b7280" opacity="0.03">⚙️</text></svg>') repeat;
    background-size: 100px 100px;
    animation: float 28s linear infinite reverse;
}

@keyframes float {
    0% { transform: translateX(0) translateY(0); }
    25% { transform: translateX(-10px) translateY(-5px); }
    50% { transform: translateX(0) translateY(-10px); }
    75% { transform: translateX(10px) translateY(-5px); }
    100% { transform: translateX(0) translateY(0); }
}

.section-title {
    font-size: 2.2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 4rem;
    color: #1f2937;
    opacity: 0;
    transform: translateY(50px) scale(0.9);
    transition: all 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    display: inline-block;
    width: 100%;
}

/* Responsive Section Title */
@media (max-width: 1024px) {
    .section-title {
        font-size: 2rem;
        margin-bottom: 3rem;
    }
}

@media (max-width: 768px) {
    .section-title {
        font-size: 1.8rem;
        margin-bottom: 2.5rem;
    }
}

@media (max-width: 480px) {
    .section-title {
        font-size: 1.6rem;
        margin-bottom: 2rem;
    }
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #2563eb, #3b82f6);
    border-radius: 2px;
    opacity: 0;
    transition: all 0.6s ease 0.3s;
}

.section-title.animate {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.section-title.animate::after {
    opacity: 1;
}

/* About Section */
.about {
    background: #f8fafc;
}



.about-text {
    opacity: 0;
    transform: translateX(-30px);
    transition: all 0.6s ease;
}

.about-text.animate {
    opacity: 1;
    transform: translateX(0);
}

.about-header {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid #e5e7eb;
}

.about-header h3 {
    font-size: 2.3rem;
    font-weight: 700;
    color: #0b1016;
    margin-bottom: rem;
}

.position {
    font-size: 1rem;
    color: #2563eb;
    font-weight: 500;
    line-height: 1.6;
    margin-bottom: 0 !important;
}

.about-text p {
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    color: #4b5563;
    text-align: justify;
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    opacity: 0;
    transform: translateX(30px);
    transition: all 0.6s ease 0.2s;
}

.about-stats.animate {
    opacity: 1;
    transform: translateX(0);
}

.stat-item {
    text-align: center;
    padding: 1.5rem;
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: #2563eb;
}

.stat-label {
    font-size: 0.9rem;
    color: #6b7280;
    font-weight: 500;
}

.about-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 3rem;
    flex-wrap: wrap;
}

.about-btn {
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    color: white;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
}

.about-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
}

/* Publications Page */
.publications-page {
    padding: 120px 0 60px;
    background: #f8fafc;
    min-height: 100vh;
}

.page-title {
    font-size: 3rem;
    font-weight: 700;
    text-align: center;
    color: #1f2937;
    margin-bottom: 3rem;
}

.publication-category {
    margin-bottom: 3rem;
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.category-title {
    font-size: 2rem;
    font-weight: 600;
    color: #2563eb;
    margin-bottom: 2rem;
    border-bottom: 2px solid #e5e7eb;
    padding-bottom: 1rem;
}

.publication-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: #f8fafc;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.publication-item:hover {
    background: #e5e7eb;
    transform: translateX(5px);
}

.pub-id {
    flex-shrink: 0;
    font-weight: 600;
    color: #2563eb;
    min-width: 50px;
}

.publication-item p {
    margin: 0;
    line-height: 1.6;
    color: #374151;
}

.publication-item em {
    color: #1f2937;
    font-weight: 500;
}

/* Education Section */
.education {
    background: white;
}

.education-timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.education-timeline::before {
    content: '';
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, #2563eb, #1d4ed8, #2563eb);
    border-radius: 2px;
    box-shadow: 0 0 10px rgba(37, 99, 235, 0.3);
}

.education-item {
    position: relative;
    margin-bottom: 3rem;
    margin-left: 60px;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.education-item.animate {
    opacity: 1;
    transform: translateY(0);
}

.education-item::before {
    content: '';
    position: absolute;
    left: -37px;
    top: 50%;
    transform: translateY(-50%);
    width: 12px;
    height: 12px;
    background: #2563eb;
    border-radius: 50%;
    border: 3px solid white;
    box-shadow: 0 0 0 3px #2563eb;
}

.education-content {
    background: #f8fafc;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.education-year {
    display: inline-block;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 1rem;
    box-shadow: 0 2px 10px rgba(37, 99, 235, 0.3);
}

.education-content:hover {
    transform: translateY(-5px);
}

.education-content h3 {
    font-size: 0.8rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 0.5rem;
}

.education-content h4 {
    font-size: 0.7rem;
    font-weight: 500;
    color: #2563eb;
    margin-bottom: 1rem;
}

.specialization {
    font-style: italic;
    color: #6b7280;
    margin-bottom: 1rem;
    font-size: 0.65rem;
}

.education-content p {
    color: #4b5563;
    margin-bottom: 0.75rem;
    line-height: 1.6;
    font-size: 0.65rem;
}

.education-content p:last-child {
    margin-bottom: 0;
}

/* Experience Section */
.experience {
    background: #f8fafc;
}

.experience-timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.experience-timeline::before {
    content: '';
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, #2563eb, #1d4ed8, #2563eb);
    border-radius: 2px;
    box-shadow: 0 0 10px rgba(37, 99, 235, 0.3);
}

.experience-item {
    position: relative;
    margin-bottom: 3rem;
    margin-left: 60px;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

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

.experience-item::before {
    content: '';
    position: absolute;
    left: -37px;
    top: 50%;
    transform: translateY(-50%);
    width: 12px;
    height: 12px;
    background: #2563eb;
    border-radius: 50%;
    border: 3px solid white;
    box-shadow: 0 0 0 3px #2563eb;
}

.experience-content {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.experience-content:hover {
    transform: translateY(-5px);
}

.experience-period {
    display: inline-block;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 1rem;
    box-shadow: 0 2px 10px rgba(37, 99, 235, 0.3);
}

.experience-content h3 {
    font-size: 0.8rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 0.5rem;
}

.experience-content h4 {
    font-size: 0.7rem;
    font-weight: 500;
    color: #2563eb;
    margin-bottom: 0;
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.skill-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(30px);
}

.skill-card.animate {
    opacity: 1;
    transform: translateY(0);
}

.skill-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.skill-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.skill-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1f2937;
}

.skill-card p {
    color: #6b7280;
}

/* Research Interests Section - Modern Carousel */
.research {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    overflow: hidden;
    color: white;
}

/* Mobile Research Section */
@media (max-width: 768px) {
    .research {
        padding: 40px 0;
    }
}

.research::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        linear-gradient(rgba(255, 255, 255, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.1) 1px, transparent 1px),
        radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    background-size: 30px 30px, 30px 30px, 100% 100%, 100% 100%;
    mask: linear-gradient(to right, transparent, white 20%, white 80%, transparent),
          linear-gradient(to bottom, transparent, white 20%, white 80%, transparent);
    mask-composite: intersect;
    z-index: 0;
}

.research .container {
    position: relative;
    z-index: 1;
}

.research-carousel {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    overflow: hidden;
    border-radius: 20px;
}

/* Mobile Research Carousel */
@media (max-width: 768px) {
    .research-carousel {
        border-radius: 15px;
        margin: 0 10px;
    }
}

@media (max-width: 480px) {
    .research-carousel {
        border-radius: 10px;
        margin: 0 5px;
    }
}

.carousel-container {
    display: flex;
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.carousel-slide {
    min-width: 100%;
    padding: 2rem;
    display: flex;
    align-items: center;
    gap: 2rem;
    min-height: 400px;
}

/* Mobile Research Layout - Column Cards */
@media (max-width: 768px) {
    .research-carousel {
        display: none;
    }
    
    .research .container::after {
        content: '';
        display: block;
    }
}

.research-mobile {
    display: none;
}

@media (max-width: 768px) {
    .research-mobile {
        display: block;
    }
    
    .research-cards {
        display: flex;
        flex-direction: column;
        gap: 1.5rem;
        padding: 0 1rem;
    }
    
    .research-card {
        background: rgba(255, 255, 255, 0.1);
        border-radius: 15px;
        padding: 1.5rem;
        backdrop-filter: blur(10px);
        border: 1px solid rgba(255, 255, 255, 0.2);
    }
    
    .research-card h3 {
        font-size: 1.4rem;
        margin-bottom: 1rem;
        color: white;
        text-align: center;
    }
    
    .research-card p {
        font-size: 0.9rem;
        margin-bottom: 1rem;
        color: rgba(255, 255, 255, 0.9);
        text-align: center;
    }
    
    .research-card .research-features {
        display: grid;
        grid-template-columns: 1fr;
        gap: 0.8rem;
    }
    
    .research-card .feature-item {
        display: flex;
        align-items: center;
        gap: 0.8rem;
        padding: 0.8rem;
        background: rgba(255, 255, 255, 0.1);
        border-radius: 10px;
        font-size: 0.85rem;
    }
}

.slide-content {
    flex: 1;
    opacity: 0;
    transform: translateX(-50px);
    animation: slideInContent 0.8s ease-out 0.3s forwards;
}

.slide-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transform: scale(0.8);
    animation: slideInVisual 0.8s ease-out 0.5s forwards;
}

.research-icon {
    font-size: 4rem;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0.1));
    border-radius: 50%;
    padding: 1.5rem;
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    animation: researchFloat 3s ease-in-out infinite;
}

@keyframes researchFloat {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-15px) rotate(5deg); }
}

.carousel-slide .feature-item {
    opacity: 0;
    transform: translateY(20px);
    animation: researchFadeInUp 0.6s ease forwards;
}

.carousel-slide .feature-item:nth-child(1) { animation-delay: 0.7s; }
.carousel-slide .feature-item:nth-child(2) { animation-delay: 0.8s; }
.carousel-slide .feature-item:nth-child(3) { animation-delay: 0.9s; }
.carousel-slide .feature-item:nth-child(4) { animation-delay: 1s; }

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

.slide-content h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #ffffff, #e2e8f0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.slide-content p {
    font-size: 1rem;
    line-height: 1.6;
    opacity: 0.9;
    margin-bottom: 1.5rem;
}

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

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.8rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.feature-icon {
    font-size: 1.5rem;
}

.feature-text {
    font-size: 0.9rem;
    font-weight: 500;
}

.carousel-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    margin-top: 3rem;
}

/* Mobile Carousel Controls */
@media (max-width: 768px) {
    .carousel-controls {
        gap: 1rem;
        margin-top: 2rem;
        flex-wrap: wrap;
    }
    
    .carousel-btn {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }
    
    .indicator {
        width: 10px;
        height: 10px;
    }
}

@media (max-width: 480px) {
    .carousel-controls {
        gap: 0.8rem;
        margin-top: 1.5rem;
    }
    
    .carousel-btn {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .indicator {
        width: 8px;
        height: 8px;
    }
}

.carousel-btn {
    width: 60px;
    height: 60px;
    border: none;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.carousel-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.carousel-indicators {
    display: flex;
    gap: 0.8rem;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: all 0.3s ease;
}

.indicator.active {
    background: white;
    transform: scale(1.3);
}

@keyframes slideInContent {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInVisual {
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Courses Section */
.courses {
    background: #f8fafc;
    position: relative;
    overflow: hidden;
}

.courses::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(37, 99, 235, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37, 99, 235, 0.05) 1px, transparent 1px);
    background-size: 30px 30px;
    mask: linear-gradient(to right, transparent, white 20%, white 80%, transparent),
          linear-gradient(to bottom, transparent, white 20%, white 80%, transparent);
    mask-composite: intersect;
    z-index: 0;
}

.courses .container {
    position: relative;
    z-index: 1;
}

.courses-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 3rem;
    max-width: 1000px;
    margin: 0 auto;
}

.course-category {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.course-category.animate {
    opacity: 1;
    transform: translateY(0);
}

.course-category h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #e5e7eb;
}

.course-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.course-item {
    padding: 1.5rem;
    background: #f8fafc;
    border-radius: 10px;
    border-left: 4px solid #2563eb;
    transition: all 0.3s ease;
}

.course-item:hover {
    transform: translateX(5px);
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.2);
}

.course-item h4 {
    font-size: 1rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.course-item p {
    color: #6b7280;
    font-size: 0.85rem;
    margin: 0;
}

/* Awards Section */
.awards {
    background: #f8fafc;
    position: relative;
    overflow: hidden;
}

.awards::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(37, 99, 235, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37, 99, 235, 0.05) 1px, transparent 1px);
    background-size: 30px 30px;
    mask: linear-gradient(to right, transparent, white 20%, white 80%, transparent),
          linear-gradient(to bottom, transparent, white 20%, white 80%, transparent);
    mask-composite: intersect;
    z-index: 0;
}

.awards .container {
    position: relative;
    z-index: 1;
}

.awards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

@media (max-width: 768px) {
    .awards-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
    }
}

.award-card {
    background: white;
    padding: 2.5rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(30px);
    border-left: 4px solid #2563eb;
    position: relative;
    overflow: hidden;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.award-card::before {
    content: '✨';
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 1.5rem;
    animation: sparkle 3s ease-in-out infinite;
}

.award-card::after {
    content: '🎉';
    position: absolute;
    top: 20px;
    left: 20px;
    font-size: 1.2rem;
    animation: celebrationFloat 4s ease-in-out infinite 1s;
}



.award-card.animate {
    opacity: 1;
    transform: translateY(0);
}

.award-card:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15), 0 0 30px rgba(37, 99, 235, 0.2);
}

.award-card.animate {
    animation: awardEntrance 0.8s ease-out forwards;
}

@keyframes awardEntrance {
    0% {
        opacity: 0;
        transform: translateY(50px) scale(0.8);
    }
    60% {
        opacity: 1;
        transform: translateY(-10px) scale(1.05);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.award-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    color: #2563eb;
    animation: awardPulse 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

@keyframes awardPulse {
    0%, 100% { 
        transform: scale(1) rotate(0deg);
        filter: drop-shadow(0 0 10px rgba(37, 99, 235, 0.3));
    }
    50% { 
        transform: scale(1.1) rotate(5deg);
        filter: drop-shadow(0 0 20px rgba(37, 99, 235, 0.6));
    }
}

@keyframes sparkle {
    0%, 100% { opacity: 0; transform: scale(0) rotate(0deg); }
    50% { opacity: 1; transform: scale(1) rotate(180deg); }
}

@keyframes celebrationFloat {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    25% { transform: translateY(-10px) rotate(5deg); }
    50% { transform: translateY(-5px) rotate(-3deg); }
    75% { transform: translateY(-15px) rotate(3deg); }
}

.award-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #1f2937 !important;
    margin-bottom: 1rem;
    position: relative;
    z-index: 2;
}

.award-content p {
    color: #efefef !important;
    font-weight: 500;
    margin-bottom: 1rem;
    line-height: 1.6;
    font-size: 0.9rem;
    position: relative;
    z-index: 2;
}

.award-year {
    display: inline-block;
    background: #2563eb;
    color: white !important;
    padding: 0.5rem 1rem;
    border-radius: 15px;
    font-weight: 600;
    font-size: 0.9rem;
    position: relative;
    z-index: 2;
}

/* Projects Section - Modern Carousel */
.projects {
    background: linear-gradient(135deg, #16a34a 0%, #15803d 100%);
    position: relative;
    overflow: hidden;
    color: white;
}

.projects::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        linear-gradient(rgba(255, 255, 255, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.1) 1px, transparent 1px),
        radial-gradient(circle at 30% 70%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 70% 30%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    background-size: 30px 30px, 30px 30px, 100% 100%, 100% 100%;
    mask: linear-gradient(to right, transparent, white 20%, white 80%, transparent),
          linear-gradient(to bottom, transparent, white 20%, white 80%, transparent);
    mask-composite: intersect;
    z-index: 0;
}

.projects .container {
    position: relative;
    z-index: 1;
}

.projects-carousel {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    overflow: hidden;
    border-radius: 20px;
}

.projects-carousel-container {
    display: flex;
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.projects-carousel-slide {
    min-width: 100%;
    padding: 2rem;
    display: flex;
    align-items: center;
    gap: 2rem;
    min-height: 400px;
}

.projects-slide-content {
    flex: 1;
    opacity: 0;
    transform: translateX(-50px);
    animation: slideInContent 0.8s ease-out 0.3s forwards;
}

.projects-slide-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transform: scale(0.8);
    animation: slideInVisual 0.8s ease-out 0.5s forwards;
}

.projects-icon {
    font-size: 4rem;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0.1));
    border-radius: 50%;
    padding: 1.5rem;
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.projects-slide-content h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #ffffff, #e2e8f0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.projects-slide-content p {
    font-size: 1rem;
    line-height: 1.6;
    opacity: 0.9;
    margin-bottom: 1.5rem;
}

.projects-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.projects-feature-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.8rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.projects-feature-icon {
    font-size: 1.5rem;
}

.projects-feature-text {
    font-size: 0.9rem;
    font-weight: 500;
}

.projects-carousel-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    margin-top: 3rem;
}

.projects-carousel-btn {
    width: 60px;
    height: 60px;
    border: none;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.projects-carousel-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.projects-carousel-indicators {
    display: flex;
    gap: 0.8rem;
}

.projects-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: all 0.3s ease;
}

.projects-indicator.active {
    background: white;
    transform: scale(1.3);
}

/* Center helper for Master's students and Post-Doctoral Fellows
   Add class="center" to the corresponding <div class="student-category ..."> in index.html
   e.g. <div class="student-category masters center"> and <div class="student-category postdoc center"> */
.student-category.center {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    gap: 1rem;
}

/* Ensure their card grids are centered and responsive */
.student-category.center .flip-cards-grid,
.student-category.center .students-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    justify-items: center;
    width: 100%;
    max-width: 1100px; /* keep a comfortable maximum width */
}

/* Center individual cards inside category */
.student-category.center .student-card,
.student-category.center .flip-card,
.student-category.center .flip-card-inner {
    margin: 0 auto;
}

/* Small-screen tweaks */
@media (max-width: 600px) {
    .student-category.center .flip-cards-grid,
    .student-category.center .students-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 14px;
    }
}

@media (max-width: 420px) {
    .student-category.center .flip-cards-grid,
    .student-category.center .students-grid {
        grid-template-columns: 1fr;
    }
}

/* Fallback: if you cannot add classes to HTML, target by order (adjust nth-of-type indices as needed) */
.students .student-category:nth-of-type(2),
.students .student-category:nth-of-type(3) {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}
.students .student-category:nth-of-type(2) .flip-cards-grid,
.students .student-category:nth-of-type(3) .flip-cards-grid {
    justify-items: center;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}

/* Contact Section */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-info {
    opacity: 0;
    transform: translateX(-30px);
    transition: all 0.6s ease;
}

.contact-map {
    opacity: 1;
    transform: translateX(0);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    background: #f8fafc;
    min-height: 400px;
    border: 2px solid #e5e7eb;
}

.contact-map iframe {
    border-radius: 15px;
    display: block;
    width: 100%;
    height: 400px;
    filter: grayscale(100%);
}

.contact-info.animate {
    opacity: 1;
    transform: translateX(0);
}

.contact-info h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: #1f2937;
}

.office-address {
    background: #f8fafc;
    padding: 1.5rem;
    border-radius: 10px;
    border-left: 4px solid #2563eb;
    margin-bottom: 2rem;
}

.office-address p {
    color: #374151;
    margin-bottom: 1rem;
    line-height: 1.6;
    font-size: 0.9rem;
}

.office-address p:last-child {
    margin-bottom: 0;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: #374151;
    text-decoration: none;
    padding: 0.75rem;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.contact-link:hover {
    background: #f3f4f6;
    transform: translateX(5px);
}



/* Footer */
/* Students Section */
.students {
    background: #f8fafc;
    position: relative;
    overflow: hidden;
}

.students::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(37, 99, 235, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37, 99, 235, 0.05) 1px, transparent 1px);
    background-size: 30px 30px;
    mask: linear-gradient(to right, transparent, white 20%, white 80%, transparent),
          linear-gradient(to bottom, transparent, white 20%, white 80%, transparent);
    mask-composite: intersect;
    z-index: 0;
}

.students .container {
    position: relative;
    z-index: 1;
}

.students-content {
    display: flex;
    flex-direction: column;
    max-width: 1200px;
    margin: 0 auto;
}

.student-category {
    margin-bottom: 4rem;
    width: 100%;
}

/* Responsive Students Section */
@media (max-width: 768px) {
    .student-category {
        margin-bottom: 3rem;
    }
}

@media (max-width: 480px) {
    .student-category {
        margin-bottom: 2rem;
    }
}

.student-category h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 2rem;
    text-align: left;
    display: inline-block;
    position: relative;
    padding-bottom: 0.5rem;
}

.student-category h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, #2563eb, rgba(37, 99, 235, 0.3));
}

.student-category h3::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, #16a34a, rgba(22, 163, 74, 0.3));
    transition: width 0.6s ease;
    z-index: 1;
}

.student-category h3:hover::before {
    width: 100%;
}

/* Flip Cards Styles */
.flip-cards-grid,
.students-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
    justify-items: center;
    width: 100%;
}

/* Responsive Students Grid */
@media (max-width: 1200px) {
    .flip-cards-grid,
    .students-grid {
        grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {
    .flip-cards-grid,
    .students-grid {
        grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
        gap: 1.2rem;
    }
}

@media (max-width: 600px) {
    .flip-cards-grid,
    .students-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .flip-cards-grid,
    .students-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.8rem;
    }
}

@media (max-width: 360px) {
    .flip-cards-grid,
    .students-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}

.flip-card {
    background-color: transparent;
    width: 100%;
    max-width: 300px;
    height: 300px;
    perspective: 1000px;
    opacity: 0;
    transform: translateY(50px) rotateY(-15deg);
    transition: all 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    margin: 0 auto;
}

/* Responsive Flip Cards */
@media (max-width: 600px) {
    .flip-card {
        height: 280px;
        max-width: 280px;
    }
}

@media (max-width: 480px) {
    .flip-card {
        height: 260px;
        max-width: 260px;
    }
}

@media (max-width: 360px) {
    .flip-card {
        height: 300px;
        max-width: 100%;
    }
}

.flip-card.flipped .flip-card-inner {
    transform: rotateY(180deg);
}

.flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.8s;
    transform-style: preserve-3d;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.flip-card-front, .flip-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    border-radius: 15px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 1.5rem;
    box-sizing: border-box;
}

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

.flip-card-back {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
    transform: rotateY(180deg);
}

.flip-card-front img {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    margin-bottom: 1rem;
    border: 4px solid rgba(255, 255, 255, 0.3);
    transition: all 0.3s ease;
}



.flip-card-front h4, .flip-card-back h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.flip-card-front p {
    font-size: 0.9rem;
    opacity: 0.9;
    margin: 0;
}

.flip-card-back p {
    font-size: 0.85rem;
    margin-bottom: 0.8rem;
    line-height: 1.4;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.flip-card-back p:last-child {
    margin-bottom: 0;
}

/* Different colors for different categories */
.student-category:nth-child(2) .flip-card-front {
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
}

.student-category:nth-child(2) .flip-card-back {
    background: linear-gradient(135deg, #3b82f6 0%, #1e40af 100%);
}

.student-category:nth-child(3) .flip-card-front {
    background: linear-gradient(135deg, #16a34a 0%, #15803d 100%);
}

.student-category:nth-child(3) .flip-card-back {
    background: linear-gradient(135deg, #22c55e 0%, #16a34a 100%);
}

.student-category:nth-child(4) .flip-card-front {
    background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
}

.student-category:nth-child(4) .flip-card-back {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

.footer {
    background: #1f2937;
    color: white;
    text-align: center;
    padding: 2rem 0;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Projects Carousel Styles */
.projects {
    background: linear-gradient(135deg, #16a34a 0%, #15803d 100%);
    color: white;
    padding: 80px 0;
}

.projects-carousel {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    overflow: hidden;
    border-radius: 20px;
}

.projects-carousel-container {
    display: flex;
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.projects-carousel-slide {
    min-width: 100%;
    padding: 2rem;
    display: flex;
    align-items: center;
    gap: 2rem;
    min-height: 400px;
}

.projects-slide-content {
    flex: 1;
    opacity: 0;
    transform: translateX(-50px);
    animation: slideInContent 0.8s ease-out 0.3s forwards;
}

.projects-slide-content h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #ffffff, #e2e8f0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.projects-slide-content p {
    font-size: 1rem;
    line-height: 1.6;
    opacity: 0.9;
    margin-bottom: 1.5rem;
}

@keyframes slideInContent {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.projects-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.projects-feature-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.8rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.projects-feature-icon {
    font-size: 1.5rem;
}

.projects-feature-text {
    font-size: 0.9rem;
    font-weight: 500;
}

.projects-carousel-controls {
    margin-top: 15px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
}

.projects-carousel-btn {
    font-size: 28px;
    padding: 5px 15px;
    background: rgba(255,255,255,0.15);
    border: none;
    border-radius: 12px;
    color: #fff;
    cursor: pointer;
    transition: 0.3s;
}

.projects-carousel-btn:hover {
    background: rgba(255,255,255,0.35);
}

.projects-indicator {
    width: 10px;
    height: 10px;
    background: #bbb;
    border-radius: 50%;
    display: inline-block;
}

.projects-indicator.active {
    background: #fff;
}

/* Responsive
@media (max-width: 768px) {
    .project-card {
        flex-direction: column;
        padding: 18px;
    }

    .project-image,
    .projects-slide-content {
        width: 100%;
    }

    .project-image {
        height: 200px;
    }
} */


/* ---- Modern Project Grid ---- */
.projects-modern {
    padding: 80px 0;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
    gap: 35px;
    justify-items: center;
    width: 100%;
}

/* Responsive Projects Grid */
@media (max-width: 1024px) {
    .projects-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 25px;
    }
}

@media (max-width: 768px) {
    .projects-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 20px;
    }
}

@media (max-width: 600px) {
    .projects-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

@media (max-width: 480px) {
    .projects-modern {
        padding: 60px 0;
    }
    
    .projects-grid {
        gap: 15px;
    }
}

/* ---- Project Card ---- */
.project-card-modern {
    background: #ffffff10;
    backdrop-filter: blur(12px);
    border-radius: 22px;
    padding: 18px;
    border: 1px solid rgba(255,255,255,0.1);
    box-shadow: 0 10px 30px rgba(0,0,0,0.25);
    transition: 0.3s ease;
    overflow: hidden;
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
}

/* Responsive Project Cards */
@media (max-width: 768px) {
    .project-card-modern {
        padding: 15px;
        border-radius: 18px;
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .project-card-modern {
        padding: 12px;
        border-radius: 15px;
    }
}

.project-card-modern:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.35);
}

/* ---- Image Wrapper ---- */
.project-image-modern {
    position: relative;
    width: 100%;
    max-width: 100%; /* ⭐ FIX */
    height: 240px;
    border-radius: 18px;
    overflow: hidden;
    background: #000;
}

.project-image-modern img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform 0.4s ease;
}

.project-image-modern:hover img {
    transform: scale(1.08);
}

/* ---- Budget Tag ---- */
.project-budget {
    position: absolute;
    top: 12px;
    right: 12px;
    background: #000000cc;
    color: #fff;
    padding: 6px 12px;
    font-size: 14px;
    border-radius: 10px;
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255,255,255,0.15);
}

/* ---- Content ---- */
.project-content-modern {
    margin-top: 15px;
}

.project-content-modern h3 {
    font-size: 22px;
    margin-bottom: 5px;
    font-weight: 700;
    color: #fff;
}

.project-content-modern p {
    font-size: 15px;
    line-height: 1.5;
    color: #e0e0e0;
}

/* ---- Mobile Fix ---- */
@media(max-width: 480px) {
    .project-image-modern {
        height: 200px;
    }
}



/* ---- Coloured Content Box ---- */
.project-content-modern {
    margin-top: 15px;
    padding: 18px;
    border-radius: 16px;

    /* Modern gradient background */
    background: linear-gradient(135deg, #1a1f4b, #0c0f28);

    /* Subtle border + shadow */
    border: 1px solid rgba(255,255,255,0.12);
    box-shadow: inset 0 0 12px rgba(255,255,255,0.08);
}

/* Heading - brighter */
.project-content-modern h3 {
    font-size: 22px;
    margin-bottom: 6px;
    font-weight: 700;
    color: #ffffff;
}

/* Description - coloured, soft */
.project-content-modern p {
    font-size: 15px;
    line-height: 1.6;
    color: #d2d7ff;
}
.about-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 50px;
    padding: 20px 0;
}

.about-text {
    flex: 1.4;
}

.about-photo {
    flex: 1;
    display: flex;
    justify-content: center;
}

.about-photo img {
    width: 100%;
    max-width: 340px;
    border-radius: 20px;
    object-fit: cover;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.25);
    transition: transform 0.3s ease;
}

.about-photo img:hover {
    transform: scale(1.03);
}

/* About Section Responsive */
@media (max-width: 1024px) {
    .about-content {
        gap: 30px;
    }
    
    .about-photo img {
        max-width: 280px;
    }
}

@media (max-width: 768px) {
    .about-content {
        flex-direction: column;
        text-align: center;
        gap: 30px;
    }
    
    .about-text {
        flex: none;
        width: 100%;
    }
    
    .about-photo {
        flex: none;
        order: -1;
    }
    
    .about-photo img {
        max-width: 250px;
        width: 80%;
    }
    
    .about-header {
        text-align: center;
    }
}

@media (max-width: 480px) {
    .about-content {
        gap: 20px;
        padding: 10px 0;
    }
    
    .about-photo img {
        max-width: 200px;
        width: 70%;
    }
    
    .about-text p {
        font-size: 0.9rem;
        text-align: left;
    }
    
    .about-header h3 {
        font-size: 1.2rem;
    }
    
    .position {
        font-size: 0.9rem;
    }
}

/* HERO FULL SECTION */
.hero {
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding-top: 80px;
}

/* BACKGROUND */
.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: linear-gradient(135deg, #0f172a, #1e293b, #334155);
    z-index: -1;
}

/* HERO CONTENT — LEFT TEXT, RIGHT IMAGE */
.hero-content {
    display: flex;
    flex-direction: row;         /* text left + image right */
    align-items: center;
    justify-content: flex-start;
    max-width: 1200px;
    width: 100%;
    padding: 0 2rem;
    gap: 4rem;
    z-index: 1;
}

/* LEFT TEXT */
.hero-text {
    flex: 1;
    display: flex;
    flex-direction: column;
    text-align: left !important;
    align-items: flex-start !important;
    gap: 1rem;
}

/* PROFILE IMAGE */
.hero-photo {
    flex-shrink: 0;
}

.profile-image {
    width: 200px;
    height: 200px;
    border-radius: 20px;
    object-fit: cover;
    border: 2px solid #fff;
    box-shadow: 0 10px 25px rgba(0,0,0,0.3);
}

/* TEXT STYLES */
.hero-title,
.hero-description,
.hero-buttons,
.social-links {
    text-align: left !important;
    align-items: flex-start !important;
}

/* BUTTONS */
.hero-buttons {
    display: flex;
    gap: 1rem;
}

/* SOCIAL ICONS */
.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 20px;
}
/* Profile adjustment */
.hero-content {
    display: flex;
    align-items: center;      
    position: relative;       /* needed for absolute positioning of photo */
    width: 100%;
    gap: 20px;
    z-index: 2;
}

.hero-text {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
    gap: 1rem;
    position: relative;
}

video {
    filter: brightness(30%) !important;  /* lower = darker */
}

/* Modern Back-to-Top Button */
#scrollTopBtn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: #0d6efd; /* Blue modern color */
    color: #fff;
    border: none;
    border-radius: 50%;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
    cursor: pointer;
    font-size: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s ease, transform 0.2s ease;
    z-index: 9999;
}

#scrollTopBtn.visible {
    opacity: 1;
    pointer-events: auto;
}

#scrollTopBtn:hover {
    transform: translateY(-3px) scale(1.1);
    box-shadow: 0 12px 25px rgba(0,0,0,0.35);
    background: #0b5ed7; /* Slightly darker on hover */
}
.collab-logo-row {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
    margin-top: 30px;
    flex-wrap: wrap;
}

.collab-logo-box img {
    height: 120px;
    width: auto;
    object-fit: contain;
    transition: transform 0.3s ease;
}

.collab-logo-box img:hover {
    transform: scale(1.08);
}

/* Hide text but keep structure */
.collab-card h4,
.collab-card p {
    display: none;
}
.announcement-float-btn {
    position: fixed;
    bottom: 90px;      /* ⬆ lifted higher */
    right: 25px;
    background: #c5c21a;
    color: white;
    width: 60px;       /* ⭕ circular shape */
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    border-radius: 50%;
    text-decoration: none;
    box-shadow: 0 8px 20px rgba(0,0,0,0.25);
    transition: 0.3s ease;
    z-index: 9999;
}

.announcement-float-btn:hover {
    background: #444343;
    transform: translateY(-4px);
}

/* Additional Responsive Fixes */

/* Ensure all images are responsive */
img {
    max-width: 100%;
    height: auto;
}

/* Fix overflow issues */
* {
    max-width: 100%;
}

/* Responsive text sizing */
@media (max-width: 768px) {
    h1 { font-size: 1.8rem; }
    h2 { font-size: 1.6rem; }
    h3 { font-size: 1.4rem; }
    h4 { font-size: 1.2rem; }
    p { font-size: 0.9rem; }
}

@media (max-width: 480px) {
    h1 { font-size: 1.6rem; }
    h2 { font-size: 1.4rem; }
    h3 { font-size: 1.2rem; }
    h4 { font-size: 1.1rem; }
    p { font-size: 0.85rem; }
}

/* Touch-friendly buttons */
@media (max-width: 768px) {
    .cta-button,
    .social-link,
    .carousel-btn {
        min-height: 44px;
        min-width: 44px;
    }
}

/* Improve readability on small screens */
@media (max-width: 480px) {
    body {
        line-height: 1.5;
    }
    
    .container {
        padding: 0 10px;
    }
}

/* Fix video background on mobile */
@media (max-width: 768px) {
    .hero-bg {
        object-position: center center;
    }
}

/* Ensure proper spacing */
.student-category h3,
.course-category-title,
.mission-title {
    margin-bottom: 1.5rem;
}

@media (max-width: 768px) {
    .student-category h3,
    .course-category-title,
    .mission-title {
        margin-bottom: 1rem;
    }
}

/* Center alignment for all sections */
.students,
.projects-modern,
.courses-modern,
.mission-section,
.about,
.awards {
    text-align: center;
}

.students .container,
.projects-modern .container,
.courses-modern .container,
.about .container,
.awards .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

/* Ensure cards are properly centered */
.students-grid,
.projects-grid,
.courses-grid,
.awards-grid {
    display: grid;
    justify-items: center;
    align-items: start;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

/* Fix collaboration section */
.collab-logo-row {
    justify-content: center;
    align-items: center;
    width: 100%;
}

/* Responsive collaboration logos */
@media (max-width: 768px) {
    .collab-logo-box img {
        height: 80px;
    }
}

@media (max-width: 480px) {
    .collab-logo-box img {
        height: 60px;
    }
}


/* Modern Courses Layout */
.courses-modern {
    padding: 60px 0;
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    justify-items: center;
    width: 100%;
}

/* Responsive Courses Grid */
@media (max-width: 1024px) {
    .courses-grid {
        gap: 25px;
    }
}

@media (max-width: 768px) {
    .courses-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .courses-modern {
        padding: 50px 0;
    }
}

@media (max-width: 480px) {
    .courses-grid {
        gap: 15px;
    }
    
    .courses-modern {
        padding: 40px 0;
    }
}

.course-card-modern {
    background: #ffffff;
    padding: 25px;
    border-radius: 18px;
    box-shadow: 0px 8px 24px rgba(0, 0, 0, 0.1);
    transition: 0.3s ease;
    width: 100%;
    max-width: 100%;
    margin: 0 auto;
}

/* Responsive Course Cards */
@media (max-width: 768px) {
    .course-card-modern {
        padding: 20px;
        border-radius: 15px;
    }
}

@media (max-width: 480px) {
    .course-card-modern {
        padding: 15px;
        border-radius: 12px;
    }
}

.course-card-modern:hover {
    transform: translateY(-6px);
    box-shadow: 0px 12px 28px rgba(0, 0, 0, 0.15);
}

.course-category-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 20px;
}

.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

/* Table Styling */
.course-table-modern {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
    font-size: 15px;
    min-width: 600px;
}

.course-table-modern th {
    background: #f5f5f5;
    padding: 10px;
    text-align: left;
    font-weight: 700;
    white-space: nowrap;
}

.course-table-modern td {
    padding: 10px;
    border-bottom: 1px solid #e6e6e6;
}

.course-table-modern tr:hover {
    background: #fafafa;
}

/* Responsive Table */
@media (max-width: 768px) {
    .course-table-modern {
        font-size: 13px;
        min-width: 500px;
    }
    
    .course-table-modern th,
    .course-table-modern td {
        padding: 8px 6px;
    }
}

@media (max-width: 480px) {
    .course-table-modern {
        font-size: 12px;
        min-width: 450px;
    }
    
    .course-table-modern th,
    .course-table-modern td {
        padding: 6px 4px;
    }
}

/* ============================
   🌟 Mission Section Modern Style
   ============================ */
.mission-section {
    width: 100%;
    padding: 80px 40px;
    background: #f8f9ff;
    display: flex;
    justify-content: center;
    align-items: center;
}

.mission-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    width: 100%;
    gap: 50px;
}

/* Responsive Mission Section */
@media (max-width: 1024px) {
    .mission-section {
        padding: 60px 30px;
    }
    
    .mission-container {
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .mission-section {
        padding: 50px 20px;
    }
    
    .mission-container {
        flex-direction: column-reverse;
        text-align: center;
        gap: 30px;
    }
}

@media (max-width: 480px) {
    .mission-section {
        padding: 40px 15px;
    }
    
    .mission-container {
        gap: 25px;
    }
}

/* LEFT TEXT */
.mission-text h2 {
    font-size: 36px;
    font-weight: 700;
    color: #222;
    margin-bottom: 20px;
}

.mission-note {
    font-size: 18px;
    line-height: 1.7;
    color: #444;
    font-family: "Poppins", sans-serif;
}

.mission-note span {
    color: #0056ff;
    font-weight: 600;
}

/* RIGHT IMAGE */
.mission-photo img {
    width: 350px;
    height: 350px;
    object-fit: cover;
    border-radius: 25px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
    transition: 0.3s ease-in-out;
}

.mission-photo img:hover {
    transform: scale(1.03);
}

/* Responsive Mission Content */
@media (max-width: 1024px) {
    .mission-text h2 {
        font-size: 32px;
    }
    
    .mission-note {
        font-size: 16px;
    }
    
    .mission-photo img {
        width: 300px;
        height: 300px;
    }
}

@media (max-width: 768px) {
    .mission-text h2 {
        font-size: 28px;
    }
    
    .mission-note {
        font-size: 15px;
    }
    
    .mission-photo img {
        width: 250px;
        height: 250px;
    }
}

@media (max-width: 480px) {
    .mission-text h2 {
        font-size: 24px;
    }
    
    .mission-note {
        font-size: 14px;
    }
    
    .mission-photo img {
        width: 200px;
        height: 200px;
    }
}

/* ============================
   📱 Responsive Design
   ============================ */

/* Medium screens */
@media (max-width: 992px) {
    .mission-container {
        flex-direction: column-reverse;
        text-align: center;
    }

    .mission-photo img {
        width: 300px;
        height: 300px;
    }

    .mission-text h2 {
        font-size: 30px;
    }
}

/* Small screens */
@media (max-width: 600px) {
    .mission-section {
        padding: 60px 20px;
    }

    .mission-note {
        font-size: 16px;
    }

    .mission-photo img {
        width: 250px;
        height: 250px;
    }
}
.research-areas-section {
    padding: 80px 0;
    background-color: #f7f9fc;
}

.research-areas-intro {
    max-width: 900px;
    margin: 0 auto 30px;
    text-align: center;
    font-size: 1.05rem;
    line-height: 1.7;
}

.research-areas-list {
    max-width: 900px;
    margin: 0 auto;
    padding-left: 20px;
}

.research-areas-list li {
    margin-bottom: 12px;
    font-size: 1rem;
    line-height: 1.6;
}


.about .about-text p {
    color: #080404 !important;
}