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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: #333;
    line-height: 1.6;
    overflow-x: hidden;
}

/* Navbar Styles */
.navbar {
    padding: 1rem 0;
    transition: all 0.3s ease;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: #2c9fdb !important;
    text-transform: capitalize;
}

.navbar-nav .nav-link {
    font-size: 0.85rem;
    font-weight: 600;
    color: #555 !important;
    padding: 0.5rem 1rem !important;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: color 0.3s ease;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: #2c9fdb !important;
}

.navbar-nav .nav-link.active {
    border-bottom: 3px solid #2c9fdb;
}

/* Hero Section */
.hero-section {
    padding: 120px 0 60px;
    background: #fff;
}

.profile-image {
    position: relative;
}

.profile-image img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.profile-info h1 {
    font-size: 2rem;
    line-height: 1.3;
    color: #2c3e50;
    margin-bottom: 1rem;
}

.profile-info p {
    font-size: 1rem;
    color: #666;
}

.faculty-link {
    color: #2c9fdb;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
}

.faculty-link:hover {
    text-decoration: underline;
}

.social-links .btn {
    border-radius: 4px;
    font-size: 0.85rem;
    padding: 0.4rem 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.social-links .btn-outline-secondary {
    border-color: #ddd;
    color: #555;
}

.social-links .btn-outline-secondary:hover {
    background-color: #2c9fdb;
    border-color: #2c9fdb;
    color: #fff;
}

/* Section Styles */
.section-padding {
    padding: 60px 0;
}

.section-header {
    margin-bottom: 2.5rem;
}

.section-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 0.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 3px solid #2c9fdb;
    display: inline-block;
}

.section-subtitle {
    font-size: 1rem;
    color: #777;
    margin-top: 1rem;
}

/* Research Overview */
.research-content p {
    font-size: 0.95rem;
    line-height: 1.8;
    color: #555;
    text-align: justify;
}

.research-content strong {
    color: #2c9fdb;
}

/* Research Interests */
.interest-card {
    background: #fff;
    border: 1px solid #e0e0e0;
    border-left: 4px solid #2c9fdb;
    padding: 1.5rem;
    height: 100%;
    transition: all 0.3s ease;
    border-radius: 4px;
}

.interest-card:hover {
    box-shadow: 0 5px 20px rgba(44, 159, 219, 0.15);
    transform: translateY(-3px);
}

.interest-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: #2c9fdb;
    margin-bottom: 0.8rem;
}

.interest-desc {
    font-size: 0.9rem;
    color: #666;
    line-height: 1.6;
    margin: 0;
}

/* Recent News */
.news-list {
    max-width: 900px;
}

.news-item {
    display: flex;
    align-items: flex-start;
    padding: 1rem 0;
    border-left: 3px solid #2c9fdb;
    padding-left: 1.5rem;
    margin-bottom: 1.5rem;
    position: relative;
}

.news-bullet {
    width: 10px;
    height: 10px;
    background: #2c9fdb;
    border-radius: 50%;
    position: absolute;
    left: -6px;
    top: 1.5rem;
}

.news-item p {
    margin: 0;
    font-size: 0.95rem;
    color: #555;
    line-height: 1.7;
}

/* Achievements */
.achievement-list {
    list-style: none;
    padding: 0;
}

.achievement-list li {
    padding: 0.8rem 0;
    padding-left: 2rem;
    position: relative;
    font-size: 0.95rem;
    color: #555;
    line-height: 1.6;
    border-bottom: 1px solid #f0f0f0;
}

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

.achievement-list li:before {
    content: "▪";
    position: absolute;
    left: 0;
    color: #2c9fdb;
    font-size: 1.2rem;
}

/* Footer */
.footer {
    background: #2c3e50 !important;
    padding: 2rem 0;
}

.footer p {
    margin: 0;
    font-size: 0.9rem;
}

.footer a {
    color: #2c9fdb;
    text-decoration: none;
}

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

/* Responsive Styles */
@media (max-width: 991px) {
    .navbar-nav {
        padding-top: 1rem;
    }
    
    .navbar-nav .nav-link {
        padding: 0.5rem 0 !important;
        border-bottom: none !important;
    }
    
    .navbar-nav .nav-link.active {
        color: #2c9fdb !important;
        border-bottom: none;
    }
    
    .hero-section {
        padding: 100px 0 40px;
    }
    
    .profile-info h1 {
        font-size: 1.6rem;
    }
}

@media (max-width: 768px) {
    .section-padding {
        padding: 40px 0;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .profile-info h1 {
        font-size: 1.4rem;
    }
    
    .interest-card {
        margin-bottom: 1rem;
    }
}

@media (max-width: 576px) {
    .hero-section {
        padding: 90px 0 30px;
    }
    
    .profile-info h1 {
        font-size: 1.3rem;
    }
    
    .social-links .btn {
        font-size: 0.8rem;
        padding: 0.35rem 0.7rem;
    }
    
    .section-title {
        font-size: 1.3rem;
    }
    
    .interest-title {
        font-size: 1rem;
    }
    
    .news-item,
    .achievement-list li {
        font-size: 0.9rem;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Background Colors */
.bg-light {
    background-color: #f8f9fa !important;
}

/* Utility Classes */
.text-muted {
    color: #6c757d !important;
}

/* Shadow */
.shadow-sm {
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075) !important;
}

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

.interest-card,
.news-item {
    animation: fadeInUp 0.6s ease-out;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #2c9fdb;
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: #2489c4;
}

/* Import base styles from main style.css or include common styles */

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: #333;
    line-height: 1.6;
    overflow-x: hidden;
    background: #fff;
}

/* Navbar Styles (Same as main) */
.navbar {
    padding: 1rem 0;
    transition: all 0.3s ease;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: #2c9fdb !important;
    text-transform: capitalize;
}

.navbar-nav .nav-link {
    font-size: 0.85rem;
    font-weight: 600;
    color: #555 !important;
    padding: 0.5rem 1rem !important;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: color 0.3s ease;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: #2c9fdb !important;
}

.navbar-nav .nav-link.active {
    border-bottom: 3px solid #2c9fdb;
}

/* Publications Header */
.publications-header {
    padding: 120px 0 60px;
    background: #fff;
    text-align: center;
}

.page-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2c9fdb;
    position: relative;
    display: inline-block;
    padding-bottom: 15px;
}

.page-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: #2c9fdb;
}

/* Publications Content */
.publications-content {
    padding: 40px 0 80px;
    background: #f8f9fa;
}

.section-padding {
    padding: 60px 0;
}

.publication-section {
    background: #fff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    margin-bottom: 2rem;
    height: 100%;
}

.publication-category-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 2rem;
    padding-bottom: 0.8rem;
    border-bottom: 3px solid #2c9fdb;
}

/* Year Section */
.year-section {
    margin-bottom: 2.5rem;
}

.year-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: #2c9fdb;
    margin-bottom: 1.5rem;
    padding: 0.5rem 0;
    background: #f0f8ff;
    padding-left: 1rem;
    border-left: 4px solid #2c9fdb;
}

/* Publications List */
.publications-list {
    margin-left: 1rem;
}

.publication-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 1.5rem;
    padding-left: 1rem;
    position: relative;
    transition: all 0.3s ease;
}

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

.pub-bullet {
    width: 8px;
    height: 8px;
    background: #2c9fdb;
    border-radius: 50%;
    position: absolute;
    left: 0;
    top: 8px;
    flex-shrink: 0;
}

.pub-content {
    flex: 1;
    padding-left: 1rem;
}

.pub-text {
    font-size: 0.95rem;
    color: #555;
    line-height: 1.8;
    margin: 0;
}

.pub-link {
    color: #2c9fdb;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.pub-link:hover {
    color: #1f7fb8;
    text-decoration: underline;
}

.pub-journal {
    font-style: italic;
    color: #666;
}

/* Copy Button */
.btn-copy {
    background: #2c9fdb;
    color: #fff;
    border: none;
    padding: 0.25rem 0.8rem;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-left: 0.5rem;
}

.btn-copy:hover {
    background: #1f7fb8;
    transform: translateY(-2px);
    box-shadow: 0 2px 8px rgba(44, 159, 219, 0.3);
}

.btn-copy:active {
    transform: translateY(0);
}

/* Footer */
.footer {
    background: #f8f9fa !important;
    padding: 2rem 0;
    border-top: 1px solid #e0e0e0;
}

.footer p {
    margin: 0;
    font-size: 0.9rem;
}

.footer-link {
    color: #2c9fdb;
    text-decoration: none;
    font-weight: 600;
}

.footer-link:hover {
    text-decoration: underline;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #2c9fdb;
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: #2489c4;
}

/* Responsive Styles */
@media (max-width: 991px) {
    .navbar-nav {
        padding-top: 1rem;
    }
    
    .navbar-nav .nav-link {
        padding: 0.5rem 0 !important;
        border-bottom: none !important;
    }
    
    .navbar-nav .nav-link.active {
        color: #2c9fdb !important;
        border-bottom: none;
    }
    
    .publications-header {
        padding: 100px 0 40px;
    }
    
    .page-title {
        font-size: 2rem;
    }
    
    .publication-section {
        margin-bottom: 2rem;
    }
}

@media (max-width: 768px) {
    .publications-header {
        padding: 90px 0 30px;
    }
    
    .page-title {
        font-size: 1.8rem;
    }
    
    .publication-category-title {
        font-size: 1.5rem;
    }
    
    .year-title {
        font-size: 1.2rem;
    }
    
    .pub-text {
        font-size: 0.9rem;
    }
    
    .publication-section {
        padding: 1.5rem;
    }
}

@media (max-width: 576px) {
    .publications-header {
        padding: 80px 0 20px;
    }
    
    .page-title {
        font-size: 1.5rem;
    }
    
    .page-title::after {
        width: 70px;
    }
    
    .publication-category-title {
        font-size: 1.3rem;
    }
    
    .year-title {
        font-size: 1.1rem;
    }
    
    .pub-text {
        font-size: 0.85rem;
    }
    
    .btn-copy {
        font-size: 0.75rem;
        padding: 0.2rem 0.6rem;
        display: block;
        margin-top: 0.5rem;
        margin-left: 0;
        width: fit-content;
    }
    
    .publication-section {
        padding: 1rem;
    }
    
    .publications-list {
        margin-left: 0.5rem;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

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

.publication-item {
    animation: fadeInUp 0.6s ease-out;
}

/* Loading State */
.publication-item.loading {
    opacity: 0.5;
    pointer-events: none;
}

/* Navbar Scroll Effect */
.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98) !important;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

/* Utility Classes */
.text-muted {
    color: #6c757d !important;
}

.shadow-sm {
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075) !important;
}

/* Copy Success Message */
.copy-success {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: #2c9fdb;
    color: white;
    padding: 1rem 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(44, 159, 219, 0.4);
    z-index: 9999;
    font-weight: 600;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translate(-50%, -50%) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1);
    }
}

/* Print Styles */
@media print {
    .navbar,
    .footer,
    .btn-copy {
        display: none;
    }
    
    .publications-header {
        padding: 20px 0;
    }
    
    .publication-section {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: #333;
    line-height: 1.6;
    overflow-x: hidden;
    background: #f5f7fa;
}

/* Navbar Styles */
.navbar {
    padding: 1rem 0;
    transition: all 0.3s ease;
    background: #fff !important;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: #2c9fdb !important;
    text-transform: capitalize;
}

.navbar-nav .nav-link {
    font-size: 0.85rem;
    font-weight: 600;
    color: #555 !important;
    padding: 0.5rem 1rem !important;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: color 0.3s ease;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: #2c9fdb !important;
}

.navbar-nav .nav-link.active {
    border-bottom: 3px solid #2c9fdb;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98) !important;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

/* Page Header */
.page-header {
    padding: 120px 0 60px;
    background: #fff;
    text-align: center;
}

.header-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #3eb8e5;
    position: relative;
    display: inline-block;
}

/* Datasets Section */
.datasets-section {
    padding: 60px 0 80px;
    background: #f5f7fa;
}

.section-intro {
    text-align: center;
    margin-bottom: 2rem;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    color: #2c7fc9;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1rem;
    color: #999;
}

/* Filter Tags */
.filter-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    margin-bottom: 3rem;
    padding: 0 1rem;
}

.filter-tag {
    background: #fff;
    border: 1px solid #ddd;
    color: #555;
    padding: 0.5rem 1.2rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-tag:hover {
    background: #e8f4f8;
    border-color: #2c9fdb;
    color: #2c9fdb;
}

.filter-tag.active {
    background: #2c9fdb;
    border-color: #2c9fdb;
    color: #fff;
}

/* Dataset Grid */
.datasets-grid {
    margin-top: 2rem;
}

.dataset-item {
    transition: all 0.3s ease;
}

.dataset-item.hidden {
    display: none;
}

/* Dataset Card */
.dataset-card {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
    position: relative;
}

.dataset-card:hover {
    box-shadow: 0 8px 25px rgba(44, 159, 219, 0.2);
    transform: translateY(-5px);
}

.dataset-badge {
    position: absolute;
    top: 15px;
    left: 15px;
    background: #2c9fdb;
    color: #fff;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    z-index: 10;
    box-shadow: 0 2px 10px rgba(44, 159, 219, 0.3);
}

.dataset-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
    background: #f0f0f0;
}

.dataset-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.dataset-card:hover .dataset-image img {
    transform: scale(1.05);
}

.dataset-content {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.dataset-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 0.8rem;
}

.dataset-description {
    font-size: 0.9rem;
    color: #666;
    line-height: 1.6;
    margin-bottom: 1rem;
    flex: 1;
}

.dataset-tags {
    font-size: 0.85rem;
    color: #888;
    margin-bottom: 1rem;
    font-style: italic;
}

/* Dataset Actions */
.dataset-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.btn-dataset,
.btn-paper {
    padding: 0.5rem 1.2rem;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-block;
}

.btn-dataset {
    background: #2c9fdb;
    color: #fff;
    border: 2px solid #2c9fdb;
}

.btn-dataset:hover {
    background: #1f7fb8;
    border-color: #1f7fb8;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(44, 159, 219, 0.3);
}

.btn-paper {
    background: #fff;
    color: #2c9fdb;
    border: 2px solid #2c9fdb;
}

.btn-paper:hover {
    background: #2c9fdb;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(44, 159, 219, 0.3);
}

/* Footer */
.footer {
    background: #e8eef3 !important;
    padding: 2rem 0;
    border-top: 1px solid #d0d0d0;
}

.footer p {
    margin: 0;
    font-size: 0.9rem;
}

.footer-link {
    color: #2c9fdb;
    text-decoration: none;
    font-weight: 600;
}

.footer-link:hover {
    text-decoration: underline;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #2c9fdb;
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: #2489c4;
}

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

.dataset-card {
    animation: fadeInUp 0.6s ease-out;
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Responsive Styles */
@media (max-width: 991px) {
    .navbar-nav {
        padding-top: 1rem;
    }
    
    .navbar-nav .nav-link {
        padding: 0.5rem 0 !important;
        border-bottom: none !important;
    }
    
    .navbar-nav .nav-link.active {
        color: #2c9fdb !important;
        border-bottom: none;
    }
    
    .page-header {
        padding: 100px 0 40px;
    }
    
    .header-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.7rem;
    }
}

@media (max-width: 768px) {
    .page-header {
        padding: 90px 0 30px;
    }
    
    .header-title {
        font-size: 1.8rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .datasets-section {
        padding: 40px 0 60px;
    }
    
    .filter-tags {
        margin-bottom: 2rem;
    }
    
    .dataset-image {
        height: 180px;
    }
}

@media (max-width: 576px) {
    .page-header {
        padding: 80px 0 20px;
    }
    
    .header-title {
        font-size: 1.5rem;
    }
    
    .section-title {
        font-size: 1.3rem;
    }
    
    .section-subtitle {
        font-size: 0.9rem;
    }
    
    .filter-tag {
        font-size: 0.8rem;
        padding: 0.4rem 1rem;
    }
    
    .dataset-content {
        padding: 1rem;
    }
    
    .dataset-title {
        font-size: 1.1rem;
    }
    
    .dataset-description {
        font-size: 0.85rem;
    }
    
    .dataset-tags {
        font-size: 0.8rem;
    }
    
    .btn-dataset,
    .btn-paper {
        font-size: 0.8rem;
        padding: 0.4rem 1rem;
    }
    
    .dataset-image {
        height: 160px;
    }
    
    .dataset-badge {
        width: 35px;
        height: 35px;
        font-size: 1rem;
        top: 10px;
        left: 10px;
    }
}

/* Loading State */
.dataset-item.loading {
    opacity: 0.5;
    pointer-events: none;
}

/* No Results Message */
.no-results {
    text-align: center;
    padding: 3rem;
    color: #999;
    font-size: 1.1rem;
}

.no-results i {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
    color: #ccc;
}

/* Utility Classes */
.text-muted {
    color: #6c757d !important;
}

.shadow-sm {
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075) !important;
}

/* Print Styles */
@media print {
    .navbar,
    .footer,
    .filter-tags {
        display: none;
    }
    
    .page-header {
        padding: 20px 0;
    }
    
    .dataset-card {
        box-shadow: none;
        border: 1px solid #ddd;
        page-break-inside: avoid;
    }
    
    .dataset-actions {
        display: none;
    }
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: #333;
    line-height: 1.6;
    overflow-x: hidden;
    background: #f9fafb;
}

/* Navbar Styles */
.navbar {
    padding: 1rem 0;
    transition: all 0.3s ease;
    background: #fff !important;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: #2c9fdb !important;
    text-transform: capitalize;
}

.navbar-nav .nav-link {
    font-size: 0.85rem;
    font-weight: 600;
    color: #555 !important;
    padding: 0.5rem 1rem !important;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: color 0.3s ease;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: #2c9fdb !important;
}

.navbar-nav .nav-link.active {
    border-bottom: 3px solid #2c9fdb;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98) !important;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

/* Page Header */
.page-header {
    padding: 120px 0 40px;
    background: #fff;
    text-align: center;
}

.header-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 1rem;
}

.header-subtitle {
    font-size: 1rem;
    color: #666;
    max-width: 700px;
    margin: 0 auto;
}

/* Search and Filter Section */
.search-filter-section {
    padding: 40px 0;
    background: #fff;
}

.search-wrapper {
    margin-bottom: 2rem;
}

.search-box {
    position: relative;
    background: #f5f7fa;
    border-radius: 50px;
    padding: 0.8rem 1.5rem;
    display: flex;
    align-items: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.search-box i {
    color: #999;
    font-size: 1rem;
    margin-right: 1rem;
}

.search-box input {
    flex: 1;
    border: none;
    background: transparent;
    outline: none;
    font-size: 0.95rem;
    color: #333;
}

.search-box input::placeholder {
    color: #999;
}

/* Filter Tags */
.filter-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    margin-bottom: 2rem;
    padding: 0 1rem;
}

.filter-tag {
    background: #fff;
    border: 1px solid #ddd;
    color: #555;
    padding: 0.5rem 1.2rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-tag:hover {
    background: #e8f4f8;
    border-color: #2c9fdb;
    color: #2c9fdb;
}

.filter-tag.active {
    background: #1a1a1a;
    border-color: #1a1a1a;
    color: #fff;
}

/* Results Header */
.results-header {
    padding: 1rem 0;
    border-bottom: 2px solid #e0e0e0;
    margin-bottom: 2rem;
}

.results-header h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: #2c3e50;
    margin: 0;
}

/* Models Section */
.models-section {
    padding: 0 0 80px;
    background: #f9fafb;
}

.models-grid {
    margin-top: 2rem;
}

.model-item {
    transition: all 0.3s ease;
}

.model-item.hidden {
    display: none;
}

/* Model Card */
.model-card {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.model-card:hover {
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
    transform: translateY(-5px);
}

.model-image {
    width: 100%;
    height: 220px;
    overflow: hidden;
    background: #f5f7fa;
    border-bottom: 1px solid #e8e8e8;
}

.model-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.model-card:hover .model-image img {
    transform: scale(1.05);
}

.model-content {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.model-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 0.8rem;
}

.model-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.model-tags .tag {
    background: #f0f0f0;
    color: #666;
    font-size: 0.75rem;
    padding: 0.3rem 0.7rem;
    border-radius: 4px;
    font-weight: 500;
}

.model-description {
    font-size: 0.9rem;
    color: #666;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    flex: 1;
}

/* Model Actions */
.model-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.btn-github,
.btn-publication {
    padding: 0.6rem 1.2rem;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-github {
    background: #1a1a1a;
    color: #fff;
    border: 2px solid #1a1a1a;
}

.btn-github:hover {
    background: #000;
    border-color: #000;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.btn-publication {
    background: #fff;
    color: #1a1a1a;
    border: 2px solid #1a1a1a;
}

.btn-publication:hover {
    background: #1a1a1a;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

/* Footer */
.footer {
    background: #e8eef3 !important;
    padding: 2rem 0;
    border-top: 1px solid #d0d0d0;
}

.footer p {
    margin: 0;
    font-size: 0.9rem;
}

.footer-link {
    color: #2c9fdb;
    text-decoration: none;
    font-weight: 600;
}

.footer-link:hover {
    text-decoration: underline;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #2c9fdb;
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: #2489c4;
}

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

.model-card {
    animation: fadeInUp 0.6s ease-out;
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* No Results Message */
.no-results {
    text-align: center;
    padding: 3rem;
    color: #999;
    font-size: 1.1rem;
    grid-column: 1 / -1;
}

.no-results i {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
    color: #ccc;
}

/* Responsive Styles */
@media (max-width: 991px) {
    .navbar-nav {
        padding-top: 1rem;
    }
    
    .navbar-nav .nav-link {
        padding: 0.5rem 0 !important;
        border-bottom: none !important;
    }
    
    .navbar-nav .nav-link.active {
        color: #2c9fdb !important;
        border-bottom: none;
    }
    
    .page-header {
        padding: 100px 0 30px;
    }
    
    .header-title {
        font-size: 2rem;
    }
    
    .header-subtitle {
        font-size: 0.95rem;
    }
}

@media (max-width: 768px) {
    .page-header {
        padding: 90px 0 25px;
    }
    
    .header-title {
        font-size: 1.8rem;
    }
    
    .search-filter-section {
        padding: 30px 0;
    }
    
    .search-box {
        padding: 0.7rem 1.2rem;
    }
    
    .search-box input {
        font-size: 0.9rem;
    }
    
    .filter-tags {
        margin-bottom: 1.5rem;
    }
    
    .results-header h3 {
        font-size: 1.2rem;
    }
    
    .model-image {
        height: 200px;
    }
}

@media (max-width: 576px) {
    .page-header {
        padding: 80px 0 20px;
    }
    
    .header-title {
        font-size: 1.5rem;
    }
    
    .header-subtitle {
        font-size: 0.9rem;
        padding: 0 1rem;
    }
    
    .search-filter-section {
        padding: 25px 0;
    }
    
    .search-box {
        border-radius: 30px;
        padding: 0.6rem 1rem;
    }
    
    .search-box i {
        font-size: 0.9rem;
        margin-right: 0.8rem;
    }
    
    .search-box input {
        font-size: 0.85rem;
    }
    
    .filter-tag {
        font-size: 0.8rem;
        padding: 0.4rem 1rem;
    }
    
    .results-header h3 {
        font-size: 1.1rem;
    }
    
    .model-content {
        padding: 1.2rem;
    }
    
    .model-title {
        font-size: 1.1rem;
    }
    
    .model-tags .tag {
        font-size: 0.7rem;
        padding: 0.25rem 0.6rem;
    }
    
    .model-description {
        font-size: 0.85rem;
    }
    
    .btn-github,
    .btn-publication {
        font-size: 0.8rem;
        padding: 0.5rem 1rem;
        flex: 1;
        justify-content: center;
    }
    
    .model-actions {
        flex-direction: column;
    }
    
    .model-image {
        height: 180px;
    }
}

/* Utility Classes */
.text-muted {
    color: #6c757d !important;
}

.shadow-sm {
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075) !important;
}

/* Loading State */
.model-item.loading {
    opacity: 0.5;
    pointer-events: none;
}

/* Print Styles */
@media print {
    .navbar,
    .footer,
    .search-filter-section {
        display: none;
    }
    
    .page-header {
        padding: 20px 0;
    }
    
    .model-card {
        box-shadow: none;
        border: 1px solid #ddd;
        page-break-inside: avoid;
    }
    
    .model-actions {
        display: none;
    }
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: #333;
    line-height: 1.6;
    overflow-x: hidden;
    background: #f5f7fa;
}

/* Navbar Styles */
.navbar {
    padding: 1rem 0;
    transition: all 0.3s ease;
    background: #fff !important;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: #2c9fdb !important;
    text-transform: capitalize;
}

.navbar-nav .nav-link {
    font-size: 0.85rem;
    font-weight: 600;
    color: #555 !important;
    padding: 0.5rem 1rem !important;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: color 0.3s ease;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: #2c9fdb !important;
}

.navbar-nav .nav-link.active {
    border-bottom: 3px solid #2c9fdb;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98) !important;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

/* Page Header */
.page-header {
    padding: 120px 0 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    text-align: center;
    color: #fff;
}

.header-title {
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.header-subtitle {
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto;
    opacity: 0.95;
}

/* Courses Section */
.courses-section {
    padding: 60px 0 80px;
    background: #f5f7fa;
}

/* Course Card */
.course-card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    margin-bottom: 2.5rem;
    overflow: hidden;
    transition: all 0.3s ease;
    border-left: 5px solid #2c9fdb;
}

.course-card:hover {
    box-shadow: 0 8px 30px rgba(44, 159, 219, 0.2);
    transform: translateY(-5px);
}

.course-card.featured {
    border-left: 5px solid #ff4757;
    background: linear-gradient(to bottom, #fff 0%, #fff9f9 100%);
}

/* Course Header */
.course-header {
    display: flex;
    align-items: center;
    padding: 2rem;
    background: linear-gradient(to right, #f8f9fa 0%, #ffffff 100%);
    border-bottom: 2px solid #e8e8e8;
}

.course-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: #fff;
    flex-shrink: 0;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.course-card.featured .course-icon {
    background: linear-gradient(135deg, #ff4757 0%, #ff6348 100%);
}

.course-header-content {
    flex: 1;
    margin-left: 1.5rem;
}

.course-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 0.8rem;
}

.course-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.course-meta .badge {
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.5rem 0.9rem;
    border-radius: 20px;
}

/* Course Body */
.course-body {
    padding: 2rem;
}

.course-description {
    margin-bottom: 2rem;
}

.course-description h4 {
    font-size: 1.3rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.course-description h4 i {
    color: #2c9fdb;
}

.course-description p {
    font-size: 1rem;
    color: #555;
    line-height: 1.8;
    margin-bottom: 1rem;
}

.course-description ul {
    list-style: none;
    padding: 0;
    margin-top: 1rem;
}

.course-description ul li {
    padding: 0.7rem 0;
    padding-left: 2rem;
    position: relative;
    font-size: 0.95rem;
    color: #666;
    line-height: 1.6;
    border-bottom: 1px solid #f0f0f0;
}

.course-description ul li:last-child {
    border-bottom: none;
}

.course-description ul li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #2c9fdb;
    font-weight: bold;
    font-size: 1.2rem;
}

.course-description ul li strong {
    color: #2c3e50;
}

/* Video Container */
.video-container {
    margin: 2rem 0;
    background: #000;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.video-wrapper {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    height: 0;
    overflow: hidden;
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* Course Actions */
.course-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 1.5rem;
}

.btn-course-material,
.btn-youtube {
    padding: 0.8rem 2rem;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.btn-course-material {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    border: 2px solid transparent;
}

.btn-course-material:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
    color: #fff;
}

.btn-youtube {
    background: #ff0000;
    color: #fff;
    border: 2px solid #ff0000;
}

.btn-youtube:hover {
    background: #cc0000;
    border-color: #cc0000;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(255, 0, 0, 0.4);
    color: #fff;
}

/* Course Statistics */
.course-statistics {
    margin-top: 4rem;
    padding: 3rem;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.stat-card {
    text-align: center;
    padding: 2rem 1rem;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.stat-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 2rem;
    color: #fff;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1rem;
    color: #666;
    font-weight: 600;
    margin: 0;
}

/* Footer */
.footer {
    background: #e8eef3 !important;
    padding: 2rem 0;
    border-top: 1px solid #d0d0d0;
}

.footer p {
    margin: 0;
    font-size: 0.9rem;
}

.footer-social {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: #2c9fdb;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: all 0.3s ease;
}

.footer-social a:hover {
    background: #1f7fb8;
    transform: translateY(-3px);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #667eea;
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: #764ba2;
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

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

.course-card {
    animation: fadeInUp 0.6s ease-out;
}

/* Responsive Styles */
@media (max-width: 991px) {
    .navbar-nav {
        padding-top: 1rem;
    }
    
    .navbar-nav .nav-link {
        padding: 0.5rem 0 !important;
        border-bottom: none !important;
    }
    
    .navbar-nav .nav-link.active {
        color: #2c9fdb !important;
        border-bottom: none;
    }
    
    .page-header {
        padding: 100px 0 40px;
    }
    
    .header-title {
        font-size: 2.2rem;
    }
    
    .header-subtitle {
        font-size: 1rem;
    }
    
    .course-header {
        flex-direction: column;
        text-align: center;
    }
    
    .course-header-content {
        margin-left: 0;
        margin-top: 1rem;
    }
    
    .course-meta {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .page-header {
        padding: 90px 0 30px;
    }
    
    .header-title {
        font-size: 1.9rem;
    }
    
    .header-subtitle {
        font-size: 0.95rem;
        padding: 0 1rem;
    }
    
    .courses-section {
        padding: 40px 0 60px;
    }
    
    .course-card {
        margin-bottom: 2rem;
    }
    
    .course-icon {
        width: 70px;
        height: 70px;
        font-size: 2rem;
    }
    
    .course-title {
        font-size: 1.5rem;
    }
    
    .course-body {
        padding: 1.5rem;
    }
    
    .course-description h4 {
        font-size: 1.2rem;
    }
    
    .course-statistics {
        padding: 2rem 1rem;
        margin-top: 3rem;
    }
    
    .stat-card {
        margin-bottom: 1rem;
    }
}

@media (max-width: 576px) {
    .page-header {
        padding: 80px 0 25px;
    }
    
    .header-title {
        font-size: 1.6rem;
    }
    
    .header-subtitle {
        font-size: 0.9rem;
    }
    
    .course-header {
        padding: 1.5rem;
    }
    
    .course-icon {
        width: 60px;
        height: 60px;
        font-size: 1.8rem;
    }
    
    .course-title {
        font-size: 1.3rem;
    }
    
    .course-meta .badge {
        font-size: 0.75rem;
        padding: 0.4rem 0.7rem;
    }
    
    .course-body {
        padding: 1rem;
    }
    
    .course-description h4 {
        font-size: 1.1rem;
    }
    
    .course-description p,
    .course-description ul li {
        font-size: 0.9rem;
    }
    
    .course-actions {
        flex-direction: column;
    }
    
    .btn-course-material,
    .btn-youtube {
        width: 100%;
        justify-content: center;
        font-size: 0.9rem;
        padding: 0.7rem 1.5rem;
    }
    
    .stat-icon {
        width: 60px;
        height: 60px;
        font-size: 1.8rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .stat-label {
        font-size: 0.9rem;
    }
    
    .footer-social {
        justify-content: center;
        margin-top: 1rem;
    }
}

/* Utility Classes */
.text-muted {
    color: #6c757d !important;
}

.shadow-sm {
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075) !important;
}

/* Print Styles */
@media print {
    .navbar,
    .footer,
    .course-actions {
        display: none;
    }
    
    .page-header {
        padding: 20px 0;
        background: #fff;
        color: #000;
    }
    
    .course-card {
        box-shadow: none;
        border: 1px solid #ddd;
        page-break-inside: avoid;
        margin-bottom: 1rem;
    }
    
    .video-container {
        display: none;
    }
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: #333;
    line-height: 1.6;
    overflow-x: hidden;
    background: #f9fafb;
}

/* Navbar Styles */
.navbar {
    padding: 1rem 0;
    transition: all 0.3s ease;
    background: #fff !important;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: #2c9fdb !important;
    text-transform: capitalize;
}

.navbar-nav .nav-link {
    font-size: 0.85rem;
    font-weight: 600;
    color: #555 !important;
    padding: 0.5rem 1rem !important;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: color 0.3s ease;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: #2c9fdb !important;
}

.navbar-nav .nav-link.active {
    border-bottom: 3px solid #2c9fdb;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98) !important;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

/* Page Header */
.page-header {
    padding: 140px 0 60px;
    background: #fff;
    text-align: center;
}

.page-title {
    font-size: 3rem;
    font-weight: 700;
    color: #e74c3c;
    margin: 0;
    position: relative;
    display: inline-block;
}

.page-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: #e74c3c;
    border-radius: 2px;
}

/* Courses Section */
.courses-section {
    padding: 60px 0 80px;
    background: #f9fafb;
}

/* Course Item */
.course-item {
    background: #fff;
    padding: 2.5rem;
    margin-bottom: 3rem;
    border-radius: 12px;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.06);
    transition: all 0.3s ease;
    border-left: 5px solid #e74c3c;
}

.course-item:hover {
    box-shadow: 0 8px 30px rgba(231, 76, 60, 0.15);
    transform: translateY(-5px);
}

.course-item.featured {
    border-left: 5px solid #ff0000;
    background: linear-gradient(to bottom, #fff 0%, #fff5f5 100%);
}

/* Course Thumbnail */
.course-thumbnail {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.course-thumbnail img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.3s ease;
}

.course-item:hover .course-thumbnail img {
    transform: scale(1.05);
}

.course-badge {
    position: absolute;
    top: 15px;
    left: 15px;
    width: 50px;
    height: 50px;
    background: #e74c3c;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: #fff;
    box-shadow: 0 4px 12px rgba(231, 76, 60, 0.4);
    z-index: 10;
}

.course-badge.youtube {
    background: #ff0000;
}

/* Video Embed */
.video-thumb {
    background: #000;
}

.video-embed {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
}

.video-embed iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* Course Content */
.course-content {
    padding-left: 1rem;
}

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

.course-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: #e74c3c;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    flex: 1;
}

.course-title i {
    font-size: 1.2rem;
}

.course-location {
    font-size: 0.95rem;
    font-weight: 600;
    color: #2c9fdb;
    white-space: nowrap;
    padding: 0.4rem 1rem;
    background: #e8f4f8;
    border-radius: 20px;
}

.course-location.youtube-badge {
    background: #ffe5e5;
    color: #ff0000;
}

.course-description {
    font-size: 1rem;
    color: #555;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    text-align: justify;
}

/* Button */
.btn-view-material {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.7rem 1.5rem;
    background: #e74c3c;
    color: #fff;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(231, 76, 60, 0.3);
}

.btn-view-material:hover {
    background: #c0392b;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(231, 76, 60, 0.4);
}

.btn-view-material.youtube {
    background: #ff0000;
    box-shadow: 0 4px 12px rgba(255, 0, 0, 0.3);
}

.btn-view-material.youtube:hover {
    background: #cc0000;
    box-shadow: 0 6px 18px rgba(255, 0, 0, 0.4);
}

/* Footer */
.footer {
    background: #e8eef3 !important;
    padding: 2rem 0;
    border-top: 1px solid #d0d0d0;
}

.footer p {
    margin: 0;
    font-size: 0.9rem;
}

.footer-social {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: #2c9fdb;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 1rem;
}

.footer-social a:hover {
    background: #1f7fb8;
    transform: translateY(-3px);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #e74c3c;
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: #c0392b;
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

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

.course-item {
    animation: fadeInUp 0.6s ease-out;
}

/* Responsive Styles */
@media (max-width: 991px) {
    .navbar-nav {
        padding-top: 1rem;
    }
    
    .navbar-nav .nav-link {
        padding: 0.5rem 0 !important;
        border-bottom: none !important;
    }
    
    .navbar-nav .nav-link.active {
        color: #2c9fdb !important;
        border-bottom: none;
    }
    
    .page-header {
        padding: 100px 0 40px;
    }
    
    .page-title {
        font-size: 2.5rem;
    }
    
    .course-content {
        padding-left: 0;
        margin-top: 1.5rem;
    }
}

@media (max-width: 768px) {
    .page-header {
        padding: 90px 0 30px;
    }
    
    .page-title {
        font-size: 2rem;
    }
    
    .courses-section {
        padding: 40px 0 60px;
    }
    
    .course-item {
        padding: 1.5rem;
        margin-bottom: 2rem;
    }
    
    .course-title {
        font-size: 1.3rem;
    }
    
    .course-header-row {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .course-location {
        font-size: 0.85rem;
        padding: 0.3rem 0.8rem;
    }
    
    .course-description {
        font-size: 0.95rem;
    }
}

@media (max-width: 576px) {
    .page-header {
        padding: 80px 0 25px;
    }
    
    .page-title {
        font-size: 1.8rem;
    }
    
    .page-title::after {
        width: 70px;
        height: 3px;
    }
    
    .course-item {
        padding: 1.2rem;
    }
    
    .course-badge {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
        top: 10px;
        left: 10px;
    }
    
    .course-title {
        font-size: 1.2rem;
        gap: 0.5rem;
    }
    
    .course-title i {
        font-size: 1rem;
    }
    
    .course-location {
        font-size: 0.8rem;
    }
    
    .course-description {
        font-size: 0.9rem;
        text-align: left;
    }
    
    .btn-view-material {
        width: 100%;
        justify-content: center;
        font-size: 0.9rem;
        padding: 0.6rem 1.2rem;
    }
    
    .footer-social {
        justify-content: center;
        margin-top: 1rem;
    }
}

/* Utility Classes */
.text-muted {
    color: #6c757d !important;
}

.shadow-sm {
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075) !important;
}

/* Print Styles */
@media print {
    .navbar,
    .footer {
        display: none;
    }
    
    .page-header {
        padding: 20px 0;
    }
    
    .course-item {
        box-shadow: none;
        border: 1px solid #ddd;
        page-break-inside: avoid;
        margin-bottom: 1rem;
    }
    
    .video-embed {
        display: none;
    }
    
    .btn-view-material {
        display: none;
    }
}