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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.5;
    color: #333;
    background-color: #fff;
    font-size: 14px;
}

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

.header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.navbar {
    padding: 1rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo h2 {
    color: #2563eb;
    font-weight: 700;
    font-size: 1.3rem;
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

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

.nav-link:hover {
    color: #2563eb;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: #2563eb;
    transition: width 0.3s ease;
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background-color: #333;
    margin: 3px 0;
    transition: 0.3s;
}

.hero, .hero-banner {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding:100px 0 15px;
    text-align: center;
}

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

.hero-logos {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    z-index: 1;
    padding: 0 2rem;
}

.hero-logo-left,
.hero-logo-right {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    text-align: center;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.hero-logo-left {
    flex-direction: row;
    gap: 1.5rem;
    align-items: center;
}

.hero-logo-right {
    align-items: center;
    justify-content: flex-start;
}

.hero-logo-left:hover,
.hero-logo-right:hover {
    opacity: 1;
}

.hero-logo-img {
    height: 72.5px;
    width: auto;
    object-fit: contain;
    margin-bottom: 0.405rem;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease;
}

.hero-logo-img:hover {
    transform: scale(1.05);
}

.igntu-logo {
    margin-top: 0;
    margin-bottom: 0;
    height: 72.5px;
    width: auto;
    object-fit: contain;
}

.springer-logo {
    transform: scale(0.72);
    margin-top: -15px;
    margin-left: 20px;
}

.springer-logo:hover {
    transform: scale(0.72) scale(1.05);
}

.hero-logo-left p,
.hero-logo-right p {
    font-size: 0.9rem;
    font-weight: 600;
    margin: 0;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero-title {
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.1rem;
    font-weight: 400;
    margin-bottom: 0;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.5;
}

.hero-organization {
    font-size: 0.6rem;
    font-weight: 400;
    margin-top: 0.5rem;
    margin-bottom: 0.5rem;
    color: #ffffff;
    text-align: center;
}

.hero-content h4 {
    margin-top: 0;
    margin-bottom: 0;
}

.marquee-container {
    overflow: hidden;
    width: 100%;
    margin-top: 0.5rem;
}

.springer-marquee {
    color: #ffd700;
    white-space: nowrap;
    display: flex;
    animation: marquee 20s linear infinite;
    margin: 0;
}

.springer-marquee span {
    display: inline-block;
    padding-right: 3rem;
}

@keyframes marquee {
    0% {
        transform: translateX(100%);
    }
    100% {
        transform: translateX(-50%);
    }
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 10px 25px;
    border: none;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    font-size: 0.9rem;
}

.btn-primary {
    background: #fff;
    color: #2563eb;
}

.btn-primary:hover {
    background: #f8fafc;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background: transparent;
    color: #fff;
    border: 2px solid #fff;
}

.btn-secondary:hover {
    background: #fff;
    color: #2563eb;
    transform: translateY(-2px);
}

.announcements {
    padding: 30px 0;
    background: #f8fafc;
}

.announcement-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.announcement-card {
    background: white;
    padding: 1.5rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.announcement-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.announcement-card i {
    font-size: 2.5rem;
    color: #2563eb;
    margin-bottom: 0.8rem;
}

.announcement-card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
    color: #1e293b;
}

.announcement-card p {
    color: #64748b;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.card-link {
    color: #2563eb;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.card-link:hover {
    color: #1d4ed8;
}

.section-header {
    text-align: center;
    margin-bottom: 1.5rem;
}

.section-header h2 {
    font-size: 2rem;
    color: #1e293b;
    margin-bottom: 0.5rem;
}

.section-header p {
    font-size: 1rem;
    color: #64748b;
    max-width: 600px;
    margin: 0 auto;
}

.about {
    padding: 30px 0;
}

.about-text p {
    font-size: 1rem;
    color: #475569;
    margin-bottom: 1.5rem;
    text-align: center;
}

.topics-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.topics-list li {
    display: flex;
    align-items: center;
    padding: 1rem;
    background: #f8fafc;
    border-radius: 10px;
    transition: background 0.3s ease;
}

.topics-list li:hover {
    background: #e2e8f0;
}

.topics-list i {
    color: #2563eb;
    margin-right: 0.8rem;
    font-size: 1rem;
}

.publication {
    padding: 30px 0;
    background: #f8fafc;
}

.publication-info p {
    font-size: 1rem;
    color: #475569;
    margin-bottom: 1.5rem;
    text-align: center;
}

.indexing-info {
    text-align: center;
}

.indexing-info h3 {
    font-size: 1.1rem;
    color: #1e293b;
    margin-bottom: 1rem;
}

.indexing-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

.badge {
    background: #2563eb;
    color: white;
    padding: 0.4rem 0.8rem;
    border-radius: 25px;
    font-weight: 600;
    font-size: 0.8rem;
}

.committee {
    padding: 30px 0;
}

#conference-cochairs.committee,
#tpc-cochairs.committee {
    padding: 10px 0 0 0;
    background: #f8fafc;
}

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

.committee-category.technical-chairs {
    grid-column: 1 / -1;
    text-align: center;
}

.committee-category.technical-chairs .member-cards-container {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.committee-category h3 {
    text-align: center;
    color: #2563eb;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.member-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.member-card:hover {
    transform: translateY(-5px);
}

.member-photo {
    width: 80px;
    height: 80px;
    background: #e2e8f0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    overflow: hidden;
    border: 3px solid #e2e8f0;
    transition: border-color 0.3s ease;
}

.member-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.member-photo i {
    font-size: 2rem;
    color: #64748b;
}

.member-card:hover .member-photo {
    border-color: #2563eb;
}

.member-card h4 {
    color: #1e293b;
    margin-bottom: 0.4rem;
    font-size: 1rem;
}

.member-card p {
    color: #64748b;
    font-size: 0.85rem;
}

.organizing-committee {
    margin-top: 1rem;
}

.committee-members {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
}

.member-item {
    background: white;
    padding: 1rem;
    border-radius: 10px;
    box-shadow: 0 3px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-left: 4px solid #2563eb;
}

.member-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.member-item h4 {
    color: #1e293b;
    margin-bottom: 0.3rem;
    font-size: 1rem;
    font-weight: 600;
}

.member-item p {
    color: #64748b;
    font-size: 0.85rem;
    line-height: 1.3;
    margin: 0;
}

.advisory-board {
    padding: 30px 0;
    background: #f8fafc;
}

.international-advisory {
    padding: 30px 0;
}

.advisory-members {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-top: 1rem;
}

.advisory-members .member-item {
    background: white;
    padding: 1rem;
    border-radius: 10px;
    box-shadow: 0 3px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-left: 4px solid #10b981;
}

.advisory-members .member-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.advisory-members .member-item h4 {
    color: #1e293b;
    margin-bottom: 0.3rem;
    font-size: 1rem;
    font-weight: 600;
}

.advisory-members .member-item p {
    color: #64748b;
    font-size: 0.85rem;
    line-height: 1.3;
    margin: 0;
}

.leadership {
    padding: 30px 0;
    background: #f8fafc;
}

.leadership-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-top: 1rem;
}

.leadership-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-top: 4px solid #2563eb;
}

.leadership-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.leadership-card.chief-patron {
    border-top-color: #dc2626;
}

.leadership-card.patron {
    border-top-color: #2563eb;
}

.leadership-card.co-patron {
    border-top-color: #059669;
}

.leadership-photo {
    width: 100px;
    height: 100px;
    background: #e2e8f0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    overflow: hidden;
    border: 4px solid #e2e8f0;
    transition: border-color 0.3s ease;
}

.leadership-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.leadership-card:hover .leadership-photo {
    border-color: #2563eb;
}

.leadership-card h3 {
    color: #1e293b;
    margin-bottom: 0.4rem;
    font-size: 1.1rem;
}

.leadership-title {
    color: #2563eb;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.4rem;
}

.leadership-card p:last-child {
    color: #64748b;
    font-size: 0.85rem;
}

.editors {
    padding: 30px 0;
}

.editors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.editor-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
    border-left: 4px solid #7c3aed;
}

.editor-card:hover {
    transform: translateY(-5px);
}

.editor-photo {
    width: 80px;
    height: 80px;
    background: #e2e8f0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    overflow: hidden;
    border: 3px solid #e2e8f0;
    transition: border-color 0.3s ease;
}

.editor-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.editor-card:hover .editor-photo {
    border-color: #7c3aed;
}

.editor-card h4 {
    color: #1e293b;
    margin-bottom: 0.5rem;
}

.editor-title {
    color: #7c3aed;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.editor-card p {
    color: #64748b;
    font-size: 0.9rem;
}

.editor-email {
    color: #7c3aed;
    font-weight: 500;
}

.organizing-chair {
    padding: 10px 0 0 0;
    background: #f8fafc;
}

.general-chair-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
    justify-items: center;
}

#organizing-chair .general-chair-grid,
#conference-chair .general-chair-grid,
#program-chair .general-chair-grid,
#publication-co-chairs .general-chair-grid,
#organizing-chairs .general-chair-grid,
#sponsorship-chair .general-chair-grid {
    grid-template-columns: repeat(2, 1fr);
}

.organizing-chair-card {
    display: flex;
    align-items: center;
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    border-left: 4px solid #059669;
    width: 100%;
}


.chair-photo {
    width: 100px;
    height: 100px;
    background: #e2e8f0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 2rem;
    overflow: hidden;
    border: 4px solid #e2e8f0;
    transition: border-color 0.3s ease;
    flex-shrink: 0;
}

.chair-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.organizing-chair-card:hover .chair-photo {
    border-color: #059669;
}

.chair-info h4 {
    color: #1e293b;
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
}

.chair-title {
    color: #059669;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.chair-info p {
    color: #64748b;
    font-size: 0.9rem;
    margin-bottom: 0.3rem;
}

.chair-email {
    color: #059669;
    font-weight: 500;
}

.program-chairs {
    padding: 10px 0 0 0;
    background: #f8fafc;
}

.program-chairs-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 1rem;
    justify-items: center;
}

#tpc-chairs .program-chairs-grid {
    grid-template-columns: repeat(4, 1fr);
}


.program-chair-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
    border-left: 4px solid #dc2626;
}

.program-chair-card:hover {
    transform: translateY(-5px);
}

.program-chair-card .chair-photo {
    width: 80px;
    height: 80px;
    margin: 0 auto 1rem;
}

.program-chair-card:hover .chair-photo {
    border-color: #dc2626;
}

.program-chair-card h4 {
    color: #1e293b;
    margin-bottom: 0.5rem;
}

.program-chair-card .chair-title {
    color: #dc2626;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.program-chair-card p {
    color: #64748b;
    font-size: 0.9rem;
}

.keynote-speakers {
    padding: 30px 0;
    background: #f8fafc;
}

.speakers-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 1rem;
}

.speaker-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
    border-top: 4px solid #f59e0b;
}

.speaker-card:hover {
    transform: translateY(-5px);
}

.speaker-photo {
    width: 80px;
    height: 80px;
    background: #e2e8f0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    overflow: hidden;
    border: 3px solid #e2e8f0;
    transition: border-color 0.3s ease;
}

.speaker-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.speaker-card:hover .speaker-photo {
    border-color: #f59e0b;
}

.speaker-card h4 {
    color: #1e293b;
    margin-bottom: 0.5rem;
}

.speaker-title {
    color: #f59e0b;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.speaker-card p {
    color: #64748b;
    font-size: 0.9rem;
}

.important-dates {
    padding: 30px 0;
    background: #f8fafc;
}

.dates-timeline {
    max-width: 800px;
    margin: 0 auto;
}

.timeline-item {
    display: flex;
    align-items: center;
    margin-bottom: 2rem;
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.timeline-date {
    background: #2563eb;
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 10px;
    font-weight: 600;
    margin-right: 2rem;
    min-width: 150px;
    text-align: center;
}

.timeline-content h3 {
    color: #1e293b;
    margin-bottom: 0.4rem;
    font-size: 1.1rem;
}

.timeline-content p {
    color: #64748b;
    font-size: 0.9rem;
}

.contact {
    padding: 30px 0;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.contact-item i {
    font-size: 2rem;
    color: #2563eb;
    margin-right: 1.5rem;
}

.contact-item h3 {
    color: #1e293b;
    margin-bottom: 0.4rem;
    font-size: 1.1rem;
}

.contact-item p {
    color: #64748b;
    font-size: 0.9rem;
}

.footer {
    background: #1e293b;
    color: white;
    padding: 2rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    margin-bottom: 1rem;
    color: #2563eb;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: #94a3b8;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #2563eb;
}

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

.social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: #334155;
    color: white;
    border-radius: 50%;
    text-decoration: none;
    transition: background 0.3s ease;
}

.social-links a:hover {
    background: #2563eb;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #334155;
    color: #94a3b8;
}

.page-hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 100px 0 50px;
    text-align: center;
}

.page-hero h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.8rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.page-hero p {
    font-size: 1rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

.nav-logo a {
    text-decoration: none;
    color: inherit;
}

.nav-link.active {
    color: #2563eb;
}

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

.content-wrapper {
    max-width: 1000px;
    margin: 0 auto;
}

.about-intro {
    text-align: center;
    margin-bottom: 4rem;
}

.about-intro h2 {
    font-size: 2rem;
    color: #1e293b;
    margin-bottom: 2rem;
}

.about-intro p {
    font-size: 1rem;
    color: #475569;
    line-height: 1.8;
    text-align: justify;
}

.topics-section {
    margin-bottom: 4rem;
}

.topics-section h3 {
    font-size: 1.8rem;
    color: #1e293b;
    margin-bottom: 2rem;
    text-align: center;
}

.topics-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.topic-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-align: center;
}

.topic-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.topic-card i {
    font-size: 2.5rem;
    color: #2563eb;
    margin-bottom: 1rem;
}

.topic-card h4 {
    font-size: 1.3rem;
    color: #1e293b;
    margin-bottom: 1rem;
}

.topic-card p {
    color: #64748b;
    line-height: 1.6;
    text-align: justify;
}

.conference-goals {
    margin-bottom: 4rem;
}

.conference-goals h3 {
    font-size: 1.8rem;
    color: #1e293b;
    margin-bottom: 2rem;
    text-align: center;
}

.goals-content p {
    font-size: 1rem;
    color: #475569;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    text-align: justify;
}

.university-info {
    padding: 30px 0;
    background: #f8fafc;
}

.university-section {
    margin-bottom: 2rem;
}

.university-section h3 {
    font-size: 1.8rem;
    color: #1e293b;
    margin-bottom: 2rem;
    text-align: center;
}

.university-info h3 {
    font-size: 1.8rem;
    color: #1e293b;
    margin-bottom: 2rem;
    text-align: center;
}

.university-details p {
    font-size: 1rem;
    color: #475569;
    line-height: 1.8;
    margin-bottom: 2rem;
    text-align: justify;
}

.university-link {
    color: #2563eb;
    text-decoration: none;
    font-weight: 700;
    transition: color 0.3s ease;
    border-bottom: 2px solid transparent;
}

.university-link:hover {
    color: #1d4ed8;
    border-bottom: 2px solid #2563eb;
}

.university-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.stat-item {
    text-align: center;
    padding: 1.5rem;
    background: white;
    border-radius: 10px;
    box-shadow: 0 3px 15px rgba(0, 0, 0, 0.1);
}

.stat-item h4 {
    font-size: 2rem;
    color: #2563eb;
    margin-bottom: 0.5rem;
    text-align: center;
}

.stat-item p {
    color: #64748b;
    margin: 0;
    text-align: center;
}

.vision-mission {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.vision, .mission {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.vision h4, .mission h4 {
    color: #2563eb;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
}

.vision h4 i, .mission h4 i {
    margin-right: 0.5rem;
}

.vision p {
    text-align: justify;
}

.mission ul {
    list-style: none;
    padding: 0;
}

.mission ul li {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
    position: relative;
    text-align: justify;
}

.mission ul li::before {
    content: "•";
    color: #2563eb;
    font-weight: bold;
    position: absolute;
    left: 0;
}

.editors {
    padding: 30px 0;
    background: #f8fafc;
}

.editors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.editor-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.editor-card:hover {
    transform: translateY(-5px);
}

.editor-photo {
    width: 100px;
    height: 100px;
    margin: 0 auto 1rem;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid #e2e8f0;
}

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

.editor-card h4 {
    color: #1e293b;
    margin-bottom: 0.5rem;
}

.editor-card .title {
    color: #2563eb;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.editor-card p {
    color: #64748b;
    margin-bottom: 0.5rem;
}

.editor-card .email {
    color: #2563eb;
    font-weight: 500;
}

.organizing-chair {
    padding: 10px 0 0 0;
}


.chair-photo {
    width: 120px;
    height: 120px;
    margin-right: 2rem;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid #e2e8f0;
}

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

.chair-info h4 {
    color: #1e293b;
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
}

.chair-info .title {
    color: #2563eb;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.chair-info p {
    color: #64748b;
    margin-bottom: 0.5rem;
}

.chair-info .email {
    color: #2563eb;
    font-weight: 500;
}

.keynote-speakers {
    padding: 50px 0;
    background: #f8fafc;
}

.speakers-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.speaker-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.speaker-card:hover {
    transform: translateY(-5px);
}

.speaker-photo {
    width: 80px;
    height: 80px;
    margin: 0 auto 1rem;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid #e2e8f0;
}

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

.speaker-card h4 {
    color: #1e293b;
    margin-bottom: 0.5rem;
}

.speaker-card .title {
    color: #2563eb;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.speaker-card p {
    color: #64748b;
    margin-bottom: 0.5rem;
}

.timeline-date {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 150px;
}

.timeline-date .date {
    font-size: 1.1rem;
    font-weight: 700;
}

.timeline-date .day {
    font-size: 0.9rem;
    opacity: 0.8;
}

.timeline-item.highlight {
    border: 2px solid #2563eb;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.timeline-actions {
    margin-top: 1rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.registration-info {
    padding: 30px 0;
    background: #f8fafc;
}

.registration-timeline {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.reg-item {
    display: flex;
    align-items: center;
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.reg-icon {
    width: 60px;
    height: 60px;
    background: #2563eb;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 1.5rem;
    font-size: 1.5rem;
}

.reg-content h3 {
    color: #1e293b;
    margin-bottom: 0.5rem;
}

.reg-date {
    color: #2563eb;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.reg-content p {
    color: #64748b;
    margin: 0;
}

.submission-guidelines {
    padding: 30px 0;
}

.guidelines-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.guideline-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.guideline-card:hover {
    transform: translateY(-5px);
}

.guideline-card i {
    font-size: 2.5rem;
    color: #2563eb;
    margin-bottom: 1rem;
}

.guideline-card h3 {
    color: #1e293b;
    margin-bottom: 1rem;
}

.guideline-card p {
    color: #64748b;
    line-height: 1.6;
    text-align: justify;
}

.springer-info {
    background: white;
    padding: 3rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.springer-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 2rem;
}

.springer-logo i {
    font-size: 3rem;
    color: #2563eb;
    margin-right: 1rem;
}

.springer-logo h3 {
    color: #1e293b;
    font-size: 2rem;
}

.springer-info p {
    font-size: 1rem;
    color: #475569;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    text-align: justify;
}

.springer-info a {
    color: #2563eb;
    text-decoration: none;
    font-weight: 600;
}

.springer-info a:hover {
    text-decoration: underline;
}

.indexing {
    padding: 30px 0;
    background: #f8fafc;
}

.indexing-content {
    background: white;
    padding: 3rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.indexing-info h3 {
    font-size: 1.5rem;
    color: #1e293b;
    margin-bottom: 2rem;
}

.indexing-badges {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.badge-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1.5rem;
    background: #f8fafc;
    border-radius: 10px;
    transition: transform 0.3s ease;
}

.badge-item:hover {
    transform: translateY(-3px);
    background: #e2e8f0;
}

.badge-item i {
    font-size: 2rem;
    color: #2563eb;
    margin-bottom: 1rem;
}

.badge-item span {
    font-weight: 600;
    color: #1e293b;
}

.publication-guidelines {
    padding: 30px 0;
}

.guidelines-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.benefits {
    padding: 30px 0;
    background: #f8fafc;
}

.benefits-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.benefit-item {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

.benefit-item i {
    font-size: 2.5rem;
    color: #2563eb;
    margin-bottom: 1rem;
}

.benefit-item h3 {
    color: #1e293b;
    margin-bottom: 1rem;
}

.benefit-item p {
    color: #64748b;
    line-height: 1.6;
    text-align: justify;
}

.call-to-action {
    padding: 30px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
}

.cta-content h2 {
    font-size: 2rem;
    margin-bottom: 0.8rem;
}

.cta-content p {
    font-size: 1rem;
    margin-bottom: 1.5rem;
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.committee-contacts {
    padding: 30px 0;
    background: #f8fafc;
}

.committee-contacts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.contact-card {
    display: flex;
    align-items: center;
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.contact-card:hover {
    transform: translateY(-5px);
}

.contact-photo {
    width: 80px;
    height: 80px;
    margin-right: 1.5rem;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid #e2e8f0;
}

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

.contact-details h4 {
    color: #1e293b;
    margin-bottom: 0.5rem;
}

.contact-details .title {
    color: #2563eb;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.contact-details p {
    color: #64748b;
    margin-bottom: 0.5rem;
}

.contact-details .email {
    color: #2563eb;
    font-weight: 500;
}

.contact-form {
    padding: 30px 0;
}

.form-container {
    max-width: 600px;
    margin: 0 auto;
}

.contact-form-element {
    background: white;
    padding: 3rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.form-group {
    margin-bottom: 2rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: #1e293b;
    font-weight: 600;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #2563eb;
}

.faq {
    padding: 30px 0;
    background: #f8fafc;
}

.faq-content {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    padding: 2rem;
    margin-bottom: 1rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.faq-item h3 {
    color: #1e293b;
    margin-bottom: 1rem;
}

.faq-item p {
    color: #64748b;
    line-height: 1.6;
    margin: 0;
}

.submission-info {
    padding: 30px 0;
}

.submission-content {
    margin-top: 2rem;
}

.guidelines-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.guideline-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.guideline-card:hover {
    transform: translateY(-5px);
}

.guideline-card i {
    font-size: 2.5rem;
    color: #2563eb;
    margin-bottom: 1rem;
}

.guideline-card h3 {
    color: #1e293b;
    margin-bottom: 1rem;
}

.guideline-card p {
    color: #64748b;
    line-height: 1.6;
    text-align: justify;
}

.submission-portal {
    padding: 30px 0;
    background: #f8fafc;
}

.portal-content {
    max-width: 800px;
    margin: 0 auto;
}

.portal-info {
    background: white;
    padding: 3rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.portal-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 2rem;
}

.portal-logo i {
    font-size: 3rem;
    color: #2563eb;
    margin-right: 1rem;
}

.portal-logo h3 {
    color: #1e293b;
    font-size: 2rem;
}

.portal-info p {
    font-size: 1rem;
    color: #475569;
    line-height: 1.8;
    margin-bottom: 2rem;
    text-align: justify;
}

.portal-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
}

.feature-item {
    display: flex;
    align-items: center;
    padding: 1rem;
    background: #f8fafc;
    border-radius: 10px;
}

.feature-item i {
    color: #10b981;
    margin-right: 0.5rem;
    font-size: 1.2rem;
}

.feature-item span {
    color: #1e293b;
    font-weight: 500;
}

.portal-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.portal-actions .btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.download-template-btn {
    display: flex !important;
    visibility: visible !important;
    opacity: 1 !important;
}

.important-dates-submission {
    padding: 30px 0;
}

.topics-of-interest {
    padding: 30px 0;
    background: #f8fafc;
}

.topics-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.topic-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-align: center;
}

.topic-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.topic-card i {
    font-size: 2.5rem;
    color: #2563eb;
    margin-bottom: 1rem;
}

.topic-card h3 {
    font-size: 1.3rem;
    color: #1e293b;
    margin-bottom: 1rem;
}

.topic-card p {
    color: #64748b;
    line-height: 1.6;
    text-align: justify;
}

@media (max-width: 1024px) and (min-width: 769px) {
    .advisory-members {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .portal-actions {
        flex-direction: column;
        align-items: center;
    }

    .portal-features {
        grid-template-columns: 1fr;
    }

    .topics-grid {
        grid-template-columns: 1fr;
    }
}

.registration-info {
    padding: 30px 0;
}

.registration-timeline {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.reg-item {
    display: flex;
    align-items: center;
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.reg-icon {
    width: 60px;
    height: 60px;
    background: #2563eb;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 1.5rem;
    font-size: 1.5rem;
}

.reg-content h3 {
    color: #1e293b;
    margin-bottom: 0.5rem;
}

.reg-date {
    color: #2563eb;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.reg-content p {
    color: #64748b;
    margin: 0;
}

.registration-fees {
    padding: 30px 0;
    background: #f8fafc;
}

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

.fee-card {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
    position: relative;
    text-align: center;
}

.fee-card:hover {
    transform: translateY(-5px);
}

.fee-card.featured {
    border: 2px solid #2563eb;
    transform: scale(1.05);
}

.featured-badge {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: #2563eb;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.fee-header h3 {
    color: #1e293b;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.fee-price {
    margin-bottom: 1rem;
}

.fee-price .currency {
    font-size: 1.2rem;
    color: #64748b;
    vertical-align: top;
}

.fee-price .amount {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2563eb;
}

.fee-price .period {
    font-size: 0.9rem;
    color: #64748b;
    margin-left: 0.5rem;
}

.fee-price.regular {
    margin-top: 0.5rem;
    opacity: 0.7;
}

.fee-features {
    margin: 2rem 0;
}

.feature-item {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
    text-align: left;
}

.feature-item i {
    color: #10b981;
    margin-right: 0.5rem;
    font-size: 1.1rem;
}

.feature-item span {
    color: #1e293b;
    font-weight: 500;
}

.registration-guidelines {
    padding: 30px 0;
    background: #f8fafc;
}

.registration-guidelines .payment-item p {
    text-align: justify !important;
    margin-bottom: 1rem;
}

.registration-process {
    padding: 30px 0;
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.step-item {
    display: flex;
    align-items: flex-start;
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.step-item:hover {
    transform: translateY(-3px);
}

.step-number {
    width: 50px;
    height: 50px;
    background: #2563eb;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin-right: 1.5rem;
    flex-shrink: 0;
}

.step-content h3 {
    color: #1e293b;
    margin-bottom: 0.5rem;
}

.step-content p {
    color: #64748b;
    line-height: 1.6;
    margin: 0;
}

.payment-methods {
    padding: 30px 0;
    background: #f8fafc;
}

.payment-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.payment-item {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

.payment-item i {
    font-size: 2.5rem;
    color: #2563eb;
    margin-bottom: 1rem;
}

.payment-item h3 {
    color: #1e293b;
    margin-bottom: 0.5rem;
}

.payment-item p {
    color: #64748b;
    margin: 0;
    text-align: center;
}

.registration-form {
    padding: 30px 0;
}

.form-container {
    max-width: 800px;
    margin: 0 auto;
}

.registration-form-element {
    background: white;
    padding: 3rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: #1e293b;
    font-weight: 600;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #2563eb;
}

.checkbox-group {
    margin: 2rem 0;
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    cursor: pointer;
    font-size: 0.9rem;
    line-height: 1.5;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    margin-right: 0.5rem;
    margin-top: 0.2rem;
}

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

    .process-steps {
        grid-template-columns: 1fr;
    }

    .step-item {
        flex-direction: column;
        text-align: center;
    }

    .step-number {
        margin-right: 0;
        margin-bottom: 1rem;
    }

    .fees-grid {
        grid-template-columns: 1fr;
    }

    .fee-card.featured {
        transform: none;
    }
}

@media (max-width: 768px) {
    .page-hero h1 {
        font-size: 2.5rem;
    }

    .topics-grid {
        grid-template-columns: 1fr;
    }

    .vision-mission {
        grid-template-columns: 1fr;
    }

    .advisory-members {
        grid-template-columns: 1fr;
    }

    .organizing-chair-card {
        flex-direction: column;
        text-align: center;
    }

    .chair-photo {
        margin-right: 0;
        margin-bottom: 1rem;
    }

    .timeline-item {
        flex-direction: column;
        text-align: center;
    }

    .timeline-date {
        margin-right: 0;
        margin-bottom: 1rem;
    }

    .reg-item {
        flex-direction: column;
        text-align: center;
    }

    .reg-icon {
        margin-right: 0;
        margin-bottom: 1rem;
    }

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

    .contact-photo {
        margin-right: 0;
        margin-bottom: 1rem;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

    .cta-content h2 {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .nav-toggle.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 200px;
    }

    .hero-logos {
        position: static;
        justify-content: center;
        gap: 2rem;
        margin-bottom: 2rem;
        padding: 0;
    }

    .hero-logo-left,
    .hero-logo-right {
        opacity: 1;
    }

    .hero-logo-img {
        height: 90px;
    }

    .announcement-cards {
        grid-template-columns: 1fr;
    }

    .topics-list {
        grid-template-columns: 1fr;
    }

    .timeline-item {
        flex-direction: column;
        text-align: center;
    }

    .timeline-date {
        margin-right: 0;
        margin-bottom: 1rem;
    }

    .contact-item {
        flex-direction: column;
        text-align: center;
    }

    .contact-item i {
        margin-right: 0;
        margin-bottom: 1rem;
    }

    .committee-category.technical-chairs .member-cards-container {
        flex-direction: column;
        align-items: center;
    }

    .general-chair-grid {
        grid-template-columns: 1fr;
    }

    .organizing-chair-card {
        flex-direction: column;
        text-align: center;
    }

    .chair-photo {
        margin-right: 0;
        margin-bottom: 1.5rem;
    }

    .program-chairs-grid {
        grid-template-columns: 1fr;
    }

    .speakers-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

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

    .announcement-card,
    .member-card,
    .timeline-item,
    .contact-item {
        padding: 1.5rem;
    }
}

/* Sponsor Cards Styles */
.sponsor-categories {
    margin-top: 3rem;
}

.sponsor-category {
    margin-bottom: 4rem;
}

.sponsor-category h3 {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 2rem;
    text-align: center;
    position: relative;
}

.sponsor-category h3::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

.sponsor-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.sponsor-card {
    background: #fff;
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.sponsor-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

.sponsor-card.platinum::before {
    background: linear-gradient(135deg, #C0C0C0, #E8E8E8);
}

.sponsor-card.gold::before {
    background: linear-gradient(135deg, #FFD700, #FFA500);
}

.sponsor-card.silver::before {
    background: linear-gradient(135deg, #C0C0C0, #F5F5F5);
}

.sponsor-card.bronze::before {
    background: linear-gradient(135deg, #CD7F32, #D2691E);
}

.sponsor-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.sponsor-logo {
    margin-bottom: 1.5rem;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sponsor-logo img {
    max-width: 100%;
    max-height: 80px;
    width: auto;
    height: auto;
    object-fit: contain;
    filter: grayscale(0.2);
    transition: all 0.3s ease;
}

.sponsor-card:hover .sponsor-logo img {
    filter: grayscale(0);
    transform: scale(1.05);
}

.sponsor-logo i {
    font-size: 3rem;
    color: var(--primary-color);
    transition: all 0.3s ease;
}

.sponsor-card:hover .sponsor-logo i {
    color: var(--secondary-color);
    transform: scale(1.1);
}

.sponsor-name {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.sponsor-role {
    font-size: 0.95rem;
    color: var(--text-light);
    font-weight: 500;
    margin: 0;
}

/* Sponsorship Packages Styles */
.sponsorship-packages {
    margin-top: 3rem;
}

.packages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.package-card {
    background: #fff;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: 2px solid #f0f0f0;
    transition: all 0.3s ease;
    position: relative;
}

.package-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
    border-color: var(--primary-color);
}

.package-header {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid #f0f0f0;
}

.package-header h4 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.package-price {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.package-features {
    list-style: none;
    padding: 0;
    margin: 0;
}

.package-features li {
    padding: 0.75rem 0;
    border-bottom: 1px solid #f5f5f5;
    display: flex;
    align-items: center;
    font-size: 0.95rem;
    color: var(--text-dark);
}

.package-features li:last-child {
    border-bottom: none;
}

.package-features li i {
    color: var(--success-color);
    margin-right: 0.75rem;
    font-size: 1rem;
}

/* Sponsor Contact Styles */
.sponsor-contact {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 3rem;
    align-items: center;
}

.sponsor-cta {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 2.5rem;
    border-radius: 12px;
    text-align: center;
}

.sponsor-cta h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.sponsor-cta p {
    margin-bottom: 2rem;
    opacity: 0.9;
}

.sponsor-cta .btn {
    background: white;
    color: var(--primary-color);
    border: none;
}

.sponsor-cta .btn:hover {
    background: #f8f9fa;
    transform: translateY(-2px);
}

/* Responsive Design for Sponsor Cards */
@media (max-width: 768px) {
    .sponsor-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 1.5rem;
    }
    
    .sponsor-card {
        padding: 1.5rem;
    }
    
    .sponsor-logo {
        height: 60px;
    }
    
    .sponsor-logo i {
        font-size: 2.5rem;
    }
    
    .sponsor-name {
        font-size: 1.2rem;
    }
    
    .packages-grid {
        grid-template-columns: 1fr;
    }
    
    .sponsor-contact {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 480px) {
    .sponsor-grid {
        grid-template-columns: 1fr;
    }
    
    .sponsor-card {
        padding: 1.25rem;
    }
    
    .sponsor-logo {
        height: 50px;
    }
    
    .sponsor-logo i {
        font-size: 2rem;
    }
}

/* Previous Conferences Styles */
.previous-conferences {
    padding: 30px 0;
}

.conferences-list {
    max-width: 900px;
    margin: 0 auto;
}

.conference-item {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-left: 4px solid #2563eb;
}

.conference-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.conference-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.8rem;
    border-bottom: 2px solid #f0f0f0;
}

.conference-header h3 {
    color: #1e293b;
    font-size: 1.3rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.conference-header h3 i {
    color: #2563eb;
}

.conference-badge {
    background: #10b981;
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.conference-content {
    display: grid;
    gap: 1rem;
}

.conference-info {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.conference-info p {
    color: #475569;
    font-size: 0.9rem;
    line-height: 1.5;
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    text-align: justify;
}

.conference-info i {
    color: #2563eb;
    margin-top: 0.2rem;
    font-size: 0.85rem;
    min-width: 16px;
}

.conference-proceedings {
    margin-top: 0.5rem;
}

.conference-proceedings p {
    color: #1e293b;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.6rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.conference-proceedings i {
    color: #2563eb;
}

.proceedings-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: #2563eb;
    color: white;
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.85rem;
    transition: all 0.3s ease;
}

.proceedings-link:hover {
    background: #1d4ed8;
    transform: translateX(3px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.proceedings-link i {
    font-size: 0.8rem;
}

@media (max-width: 768px) {
    .conference-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.8rem;
    }

    .conference-header h3 {
        font-size: 1.1rem;
    }

    .conference-item {
        padding: 1.2rem;
    }

    .conference-info p {
        font-size: 0.85rem;
    }
}

/* Authors Guidelines Styles */
.authors-guidelines {
    padding: 30px 0;
    background: #f8fafc;
}

.guidelines-list {
    max-width: 900px;
    margin: 0 auto;
}

.guideline-item {
    display: flex;
    align-items: flex-start;
    background: white;
    padding: 1.5rem;
    margin-bottom: 1rem;
    border-radius: 10px;
    box-shadow: 0 3px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-left: 4px solid #2563eb;
}

.guideline-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.guideline-item i {
    color: #2563eb;
    margin-right: 1rem;
    margin-top: 0.2rem;
    font-size: 1.2rem;
    min-width: 20px;
}

.guideline-item p {
    color: #475569;
    font-size: 0.95rem;
    line-height: 1.6;
    margin: 0;
    text-align: justify;
}

.guideline-item a {
    color: #2563eb;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.guideline-item a:hover {
    color: #1d4ed8;
    text-decoration: underline;
}

@media (max-width: 768px) {
    .guideline-item {
        padding: 1.2rem;
    }
    
    .guideline-item i {
        font-size: 1.1rem;
        margin-right: 0.8rem;
    }
    
    .guideline-item p {
        font-size: 0.9rem;
    }
}

/* Navigation Dropdown Styles */
.nav-dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.dropdown-toggle i {
    font-size: 0.8rem;
    transition: transform 0.3s ease;
}

.nav-dropdown:hover .dropdown-toggle i {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: #fff;
    min-width: 200px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    border-radius: 8px;
    padding: 0.5rem 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
    border: 1px solid #e0e0e0;
}

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

.dropdown-link {
    display: block;
    padding: 0.75rem 1.5rem;
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.dropdown-link:hover {
    background: var(--primary-color);
    color: rgb(74, 128, 245);
    border-left-color: var(--secondary-color);
}

.dropdown-link.active {
    background: var(--primary-color);
    color: white;
    border-left-color: var(--secondary-color);
}

/* Mobile Navigation Dropdown */
@media (max-width: 768px) {
    .nav-dropdown {
        width: 100%;
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: rgba(255, 255, 255, 0.1);
        border: none;
        border-radius: 0;
        padding: 0;
        margin-top: 0.5rem;
        display: none;
    }
    
    .nav-dropdown.active .dropdown-menu {
        display: block;
    }
    
    .dropdown-link {
        padding: 0.75rem 1rem;
        color: rgba(255, 255, 255, 0.8);
        border-left: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .dropdown-link:hover,
    .dropdown-link.active {
        background: rgba(255, 255, 255, 0.1);
        color: white;
        border-left: none;
    }
    
    .dropdown-toggle i {
        transform: none;
    }
    
    .nav-dropdown.active .dropdown-toggle i {
        transform: rotate(180deg);
    }
}