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

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

.container {
    max-width: none;
    width: 100%;
    margin: 0;
    padding: 0 2rem;
}

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

.nav-logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: #2c5aa0;
    margin-bottom: 0.2rem;
}

.nav-logo span {
    font-size: 0.9rem;
    color: #666;
    font-weight: 400;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

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

.nav-link:hover,
.nav-link.active {
    color: #2c5aa0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #2c5aa0;
    transition: width 0.3s ease;
}

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

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

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    overflow: hidden;
}

.conference-logos {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
    margin-bottom: 30px;
    flex-direction: row;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
}

.logo-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.logo-image {
    width: 160px;
    height: 160px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 15px;
    padding: 12px;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.logo-image:hover {
    transform: scale(1.05);
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}

.logo-image img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    filter: brightness(1.1) contrast(1.1);
}

.logo-text {
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
    text-align: center;
}

.logo-divider {
    color: white;
    font-size: 2rem;
    font-weight: bold;
    margin: 0 10px;
}

.hero-content {
    flex: 1;
    max-width: 600px;
    padding: 0 20px;
    z-index: 2;
    color: white;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: 1.5rem;
    opacity: 0.9;
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    line-height: 1.8;
}

.hero-dates {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
}

.date-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
}

.date-item i {
    font-size: 1.2rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    padding: 12px 30px;
    border: none;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background: #ff6b6b;
    color: white;
}

.btn-primary:hover {
    background: #ff5252;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 107, 107, 0.4);
}

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

.btn-secondary:hover {
    background: white;
    color: #667eea;
    transform: translateY(-2px);
}

.hero-image {
    flex: 1;
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ocean-animation {
    position: relative;
    width: 100%;
    height: 300px;
    overflow: hidden;
}

.wave {
    position: absolute;
    width: 200%;
    height: 100px;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.3) 50%, rgba(255, 255, 255, 0.1) 100%);
    border-radius: 50%;
    animation: wave 6s ease-in-out infinite;
}

.wave1 {
    top: 0;
    animation-delay: 0s;
}

.wave2 {
    top: 50px;
    animation-delay: 2s;
}

.wave3 {
    top: 100px;
    animation-delay: 4s;
}

@keyframes wave {

    0%,
    100% {
        transform: translateX(-50%) translateY(0);
    }

    50% {
        transform: translateX(-50%) translateY(-20px);
    }
}

/* Section Styles */
section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: #2c5aa0;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 2px;
}

/* About Section */
.about {
    background: #f8f9fa;
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: #666;
    line-height: 1.8;
}

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

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

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

.stat-item h3 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2c5aa0;
    margin-bottom: 0.5rem;
}

.stat-item p {
    color: #666;
    font-weight: 500;
}

/* Program Section */
.program-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
}

.tab-btn {
    padding: 12px 30px;
    border: 2px solid #2c5aa0;
    background: transparent;
    color: #2c5aa0;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
}

.tab-btn.active,
.tab-btn:hover {
    background: #2c5aa0;
    color: white;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.program-item {
    display: flex;
    gap: 2rem;
    padding: 2rem;
    margin-bottom: 1rem;
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

.program-item .time {
    flex: 0 0 150px;
    font-weight: 600;
    color: #2c5aa0;
    font-size: 1.1rem;
}

.program-item .content h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: #333;
}

.program-item .content p {
    color: #666;
    line-height: 1.6;
}

/* Organizing Committee Section */
.organizing-committee {
    padding: 60px 0;
    background-color: #ffffff;
}

.committee-content {
    max-width: 900px;
    margin: 0 auto;
}

.committee-section {
    margin-bottom: 30px;
}

.committee-section h3 {
    color: #2c3e50;
    font-size: 1.2rem;
    margin-bottom: 15px;
    text-align: center;
    position: relative;
    padding-bottom: 8px;
}

.committee-section h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 2px;
    background: linear-gradient(90deg, #007bff, #00d4ff);
    border-radius: 1px;
}

.committee-members {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
}

.committee-member {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 15px;
    text-align: center;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.committee-member:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 123, 255, 0.1);
}

.member-info h4 {
    color: #2c3e50;
    margin-bottom: 5px;
    font-size: 1rem;
    font-weight: 600;
}

.member-info p {
    color: #666;
    font-size: 0.85rem;
    line-height: 1.3;
    margin: 0;
}

/* Speakers Section */
.speakers {
    background: #f8f9fa;
}

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

.speaker-card {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    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-image {
    width: 150px;
    height: 150px;
    margin: 0 auto 1.5rem;
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid #2c5aa0;
}

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

.speaker-info h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: #333;
}

.speaker-info p {
    color: #666;
    margin-bottom: 0.3rem;
}

/* Registration Section */
.registration-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

/* Checkbox Group Styles */
.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    margin-top: 0.5rem;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.8rem;
    background: #f8f9fa;
    border-radius: 8px;
    border: 1px solid #e9ecef;
    transition: all 0.3s ease;
}

.checkbox-item:hover {
    background: #e9ecef;
    border-color: #2c5aa0;
}

.checkbox-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: #2c5aa0;
    cursor: pointer;
}

.checkbox-item label {
    margin: 0;
    cursor: pointer;
    font-size: 0.95rem;
    color: #333;
    flex: 1;
}

/* Speaker Placeholder Styles */
.speaker-placeholder {
    width: 100%;
    height: 100%;
    background: #f8f9fa;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 3px solid #e9ecef;
}

.speaker-placeholder i {
    font-size: 3rem;
    color: #adb5bd;
}

/* Download Section Styles */
.download-section-bottom {
    background: #f8f9fa;
    border-top: 1px solid #e9ecef;
    padding: 2rem 0;
    text-align: center;
    margin-top: 2rem;
}

.btn-download {
    background: #28a745;
    border-color: #28a745;
    color: white;
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.btn-download:hover {
    background: #218838;
    border-color: #1e7e34;
    transform: translateY(-1px);
}

.btn-download i {
    margin-right: 0.5rem;
}

.registration-info h3 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    color: #333;
}

.no-fee-notice {
    background: linear-gradient(135deg, #e8f5e8, #f0f8f0);
    border: 2px solid #4caf50;
    border-radius: 15px;
    padding: 2rem;
    text-align: center;
    box-shadow: 0 5px 20px rgba(76, 175, 80, 0.1);
}

.no-fee-icon {
    font-size: 3rem;
    color: #4caf50;
    margin-bottom: 1rem;
}

.no-fee-notice h4 {
    font-size: 2rem;
    color: #2e7d32;
    margin-bottom: 1rem;
    font-weight: bold;
}

.no-fee-notice p {
    font-size: 1.1rem;
    color: #555;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.included-items {
    text-align: left;
    background: white;
    border-radius: 10px;
    padding: 1.5rem;
    margin-top: 1.5rem;
}

.included-items h5 {
    color: #2e7d32;
    font-size: 1.2rem;
    margin-bottom: 1rem;
    text-align: center;
}

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

.included-items li {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 0.8rem;
    color: #555;
}

.included-items li i {
    color: #4caf50;
    font-size: 1rem;
}

.pricing-table {
    display: grid;
    gap: 1.5rem;
}

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

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

.pricing-item h4 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #333;
}

.price {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2c5aa0;
    margin-bottom: 1rem;
}

.pricing-item ul {
    list-style: none;
    text-align: left;
}

.pricing-item li {
    padding: 0.5rem 0;
    color: #666;
    position: relative;
    padding-left: 1.5rem;
}

.pricing-item li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #2c5aa0;
    font-weight: bold;
}

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

.registration-form h3 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    color: #333;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #333;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    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: #2c5aa0;
}

/* Venue Section */
.venue {
    background: #f8f9fa;
    padding: 4rem 2rem;
    width: 100vw !important;
    max-width: none !important;
    margin: 0 !important;
    box-sizing: border-box;
}

.venue-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.venue-info h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: #333;
}

.venue-info p {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 2rem;
}

.venue-details {
    display: grid;
    gap: 1rem;
}

.detail-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: white;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
}

.detail-item i {
    font-size: 1.2rem;
    color: #2c5aa0;
    width: 20px;
}

.venue-directions {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.direction-card {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.direction-card h4 {
    color: #2c3e50;
    font-size: 1.3rem;
    margin-bottom: 1rem;
    text-align: center;
    border-bottom: 2px solid #007bff;
    padding-bottom: 0.5rem;
}

.direction-image {
    margin-bottom: 1rem;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
}

.direction-details {
    color: #666;
    line-height: 1.6;
}

.direction-details p {
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.direction-details strong {
    color: #2c3e50;
    font-weight: 600;
}

.route-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 15px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
    border: 1px solid #e9ecef;
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    padding: 8px 12px;
    background: white;
    border-radius: 6px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    min-width: 80px;
}

.step i {
    font-size: 1.2rem;
    color: #2c5aa0;
}

.step span {
    font-size: 0.8rem;
    font-weight: 500;
    color: #2c3e50;
    text-align: center;
}

.step-arrow {
    color: #2c5aa0;
    font-size: 1.2rem;
    font-weight: bold;
    margin: 0 5px;
}

/* Program Section - Block Layout */
.program-schedule {
    max-width: 1000px;
    margin: 0 auto;
}

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

.day h3 {
    color: #2c3e50;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 3px solid #2c5aa0;
}

.session-block {
    display: flex;
    margin-bottom: 1.5rem;
    background: #f8f9fa;
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 2px solid transparent;
}

.session-block:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    border-color: #2c5aa0;
}

.session-time {
    background: linear-gradient(135deg, #2c5aa0, #1e3a8a);
    color: white;
    padding: 1.5rem;
    font-weight: bold;
    min-width: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    text-align: center;
    line-height: 1.3;
}

.session-content {
    flex: 1;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.session-content h4 {
    color: #2c3e50;
    margin-bottom: 0.8rem;
    font-size: 1.3rem;
    font-weight: 600;
}

.session-content p {
    color: #666;
    margin-bottom: 0.5rem;
    line-height: 1.5;
    font-size: 1rem;
}

.session-content p:last-child {
    color: #2c5aa0;
    font-weight: 500;
    font-size: 0.95rem;
    margin-bottom: 0;
}

/* Special styling for different session types */
.session-block:nth-child(2) .session-time {
    background: linear-gradient(135deg, #d32f2f, #b71c1c);
    /* Tutorial */
}

.session-block:nth-child(3) .session-time {
    background: linear-gradient(135deg, #f57c00, #e65100);
    /* Opening Ceremony */
}

.session-block:nth-child(4) .session-time {
    background: linear-gradient(135deg, #2c5aa0, #1e3a8a);
    /* Technical Session */
}

.session-block:nth-child(5) .session-time {
    background: linear-gradient(135deg, #388e3c, #2e7d32);
    /* Banquet */
}

.session-block:nth-child(6) .session-time {
    background: linear-gradient(135deg, #7b1fa2, #6a1b9a);
    /* Onsite Tour */
}

/* Program Detail Page */
.program-detail {
    padding: 100px 0 80px;
    background: #f8f9fa;
}

.page-title {
    font-size: 2.5rem;
    color: #2c3e50;
    text-align: center;
    margin-bottom: 1rem;
}

.page-subtitle {
    font-size: 1.1rem;
    color: #666;
    text-align: center;
    margin-bottom: 3rem;
}

.program-schedule {
    max-width: 1000px;
    margin: 0 auto;
}

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

.day h3 {
    color: #2c3e50;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 3px solid #2c5aa0;
}

.session-block {
    display: flex;
    margin-bottom: 1.5rem;
    background: #f8f9fa;
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 2px solid transparent;
}

.session-block:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    border-color: #2c5aa0;
}

.session-time {
    background: linear-gradient(135deg, #2c5aa0, #1e3a8a);
    color: white;
    padding: 1.5rem;
    font-weight: bold;
    min-width: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    text-align: center;
    line-height: 1.3;
}

.session-content {
    flex: 1;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.session-content h4 {
    color: #2c3e50;
    margin-bottom: 0.8rem;
    font-size: 1.3rem;
    font-weight: 600;
}

.session-content p {
    color: #666;
    margin-bottom: 0.5rem;
    line-height: 1.5;
    font-size: 1rem;
}

.session-content p:last-child {
    color: #2c5aa0;
    font-weight: 500;
    font-size: 0.95rem;
    margin-bottom: 0;
}

/* Special styling for different session types */
.session-block:nth-child(2) .session-time {
    background: linear-gradient(135deg, #d32f2f, #b71c1c);
    /* Tutorial */
}

.session-block:nth-child(3) .session-time {
    background: linear-gradient(135deg, #f57c00, #e65100);
    /* Opening Ceremony */
}

.session-block:nth-child(4) .session-time {
    background: linear-gradient(135deg, #2c5aa0, #1e3a8a);
    /* Technical Session */
}

.session-block:nth-child(5) .session-time {
    background: linear-gradient(135deg, #388e3c, #2e7d32);
    /* Banquet */
}

.session-block:nth-child(6) .session-time {
    background: linear-gradient(135deg, #7b1fa2, #6a1b9a);
    /* Onsite Tour */
}

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

.contact-info {
    display: grid;
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 1.5rem;
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.contact-item i {
    font-size: 1.5rem;
    color: #2c5aa0;
    width: 30px;
}

.contact-item h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: #333;
}

.contact-item p {
    color: #666;
}

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

.contact-form h3 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    color: #333;
}

/* Footer */
.footer {
    background: #2c3e50;
    color: white;
    padding: 3rem 0 1rem;
}

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

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: #ecf0f1;
}

.footer-section p {
    color: #bdc3c7;
    margin-bottom: 0.5rem;
}

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

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

.footer-section ul li a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #3498db;
}

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

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: #34495e;
    color: white;
    border-radius: 50%;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: #3498db;
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #34495e;
    color: #bdc3c7;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .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;
    }

    .hero {
        flex-direction: column;
        text-align: center;
        padding: 100px 20px 50px;
    }

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

    .hero-dates {
        flex-direction: column;
        gap: 1rem;
    }

    .hero-buttons {
        justify-content: center;
    }

    .about-content,
    .registration-content,
    .venue-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .program-item {
        flex-direction: column;
        gap: 1rem;
    }

    .program-item .time {
        flex: none;
        text-align: center;
    }

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

    .pricing-table {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 2rem;
    }
}

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

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .about-stats {
        grid-template-columns: 1fr;
    }

    .program-tabs {
        flex-direction: column;
        align-items: center;
    }

    .tab-btn {
        width: 200px;
    }
}

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

/* Loading Animation */
.loading {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.loading.loaded {
    opacity: 1;
    transform: translateY(0);
}

/* Program Detail Page Styles */
.page-title {
    text-align: center;
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: #2c5aa0;
}

.program-day {
    margin-bottom: 4rem;
    background: white;
    border-radius: 20px;
    padding: 3rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.day-title {
    font-size: 2rem;
    font-weight: 700;
    color: #2c5aa0;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 3px solid #667eea;
}

.program-schedule {
    display: grid;
    gap: 1.5rem;
}

.schedule-item {
    display: flex;
    gap: 2rem;
    padding: 2rem;
    border-radius: 15px;
    transition: all 0.3s ease;
    border-left: 5px solid transparent;
}

.schedule-item:hover {
    transform: translateX(10px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.schedule-item.keynote {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-left-color: #ff6b6b;
}

.schedule-item.session {
    background: #f8f9fa;
    border-left-color: #2c5aa0;
}

.schedule-item.workshop {
    background: #e8f5e8;
    border-left-color: #4CAF50;
}

.schedule-item.poster {
    background: #fff3e0;
    border-left-color: #ff9800;
}

.schedule-item.panel {
    background: #f3e5f5;
    border-left-color: #9c27b0;
}

.schedule-item.break {
    background: #e3f2fd;
    border-left-color: #2196F3;
}

.schedule-item.lunch {
    background: #fce4ec;
    border-left-color: #e91e63;
}

.schedule-item.dinner {
    background: #f1f8e9;
    border-left-color: #8bc34a;
}

.schedule-item.closing {
    background: linear-gradient(135deg, #2c5aa0 0%, #667eea 100%);
    color: white;
    border-left-color: #ff6b6b;
}

.schedule-item .time {
    flex: 0 0 150px;
    font-weight: 600;
    font-size: 1.1rem;
    color: inherit;
}

.schedule-item .content {
    flex: 1;
}

.schedule-item .content h3 {
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
    color: inherit;
}

.schedule-item .content p {
    margin-bottom: 0.5rem;
    line-height: 1.6;
    color: inherit;
}

.schedule-item .content strong {
    font-weight: 600;
}

.location {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    margin-top: 0.5rem;
}

.schedule-item:not(.keynote):not(.closing) .location {
    background: #2c5aa0;
    color: white;
}

.presentations {
    margin-top: 1rem;
    display: grid;
    gap: 1rem;
}

.presentation {
    padding: 1rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    border-left: 3px solid rgba(255, 255, 255, 0.3);
}

.schedule-item:not(.keynote):not(.closing) .presentation {
    background: white;
    border-left-color: #2c5aa0;
}

.presentation h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: inherit;
}

.presentation p {
    margin-bottom: 0.3rem;
    font-size: 0.95rem;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: #2c5aa0;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #1e3d72;
}

/* Abstract Section Improved Styles */
.abstract {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: 3rem 0;
}

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

.deadline-notice {
    margin-bottom: 2rem;
}

.deadline-notice h3 {
    color: #2c5aa0;
    font-size: 1.4rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.deadline-box {
    background: linear-gradient(135deg, #dc3545, #c82333);
    color: white;
    padding: 1.5rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 6px 20px rgba(220, 53, 69, 0.3);
}

.deadline-box h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.deadline-date {
    font-size: 1.8rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

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

.template-section h3 {
    color: #2c5aa0;
    font-size: 1.4rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.template-download {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.btn-template {
    background: linear-gradient(135deg, #28a745, #20c997);
    color: white;
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    transition: all 0.3s ease;
    margin-top: 0.8rem;
}

.btn-template:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(40, 167, 69, 0.3);
    color: white;
    text-decoration: none;
}

.submission-instructions {
    margin-bottom: 2rem;
}

.submission-instructions h3 {
    color: #2c5aa0;
    font-size: 1.4rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.instructions-content {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.instruction-step {
    background: white;
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    border-left: 4px solid #2c5aa0;
}

.step-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.step-number {
    background: linear-gradient(135deg, #2c5aa0, #1e3d72);
    color: white;
    width: 35px;
    height: 35px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.step-header h4 {
    color: #2c5aa0;
    font-size: 1.2rem;
    margin: 0;
}

.step-description {
    padding-left: 2.5rem;
}

.step-description p {
    margin-bottom: 0.8rem;
    line-height: 1.6;
    color: #555;
}

.email-highlight {
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    padding: 1rem;
    border-radius: 8px;
    text-align: center;
    margin: 0.8rem 0;
    border: 2px solid #2c5aa0;
}

.email-highlight i {
    margin-right: 0.5rem;
    color: #2c5aa0;
}

.presentation-options {
    margin: 1rem 0;
}

.option-item {
    background: #f8f9fa;
    padding: 0.8rem 1.2rem;
    border-radius: 8px;
    margin-bottom: 0.8rem;
    border-left: 4px solid #28a745;
}

.option-item strong {
    display: block;
    color: #2c5aa0;
    margin-bottom: 0.3rem;
}

.option-item span {
    color: #666;
    font-size: 0.9rem;
}

.important-note {
    background: linear-gradient(135deg, #fff3cd, #ffeaa7);
    padding: 0.8rem 1.2rem;
    border-radius: 8px;
    border-left: 4px solid #ffc107;
    margin-top: 1rem;
}

.important-note i {
    color: #856404;
    margin-right: 0.5rem;
}

.contact-info {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.contact-info h3 {
    color: #2c5aa0;
    font-size: 1.4rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.contact-details p {
    margin-bottom: 0.5rem;
    line-height: 1.8;
}

/* Contact Method Styles */
.contact-method {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.contact-method h3 {
    color: #2c5aa0;
    font-size: 1.4rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.contact-instructions p {
    color: #555;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.contact-highlight {
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    padding: 1.5rem;
    border-radius: 10px;
    margin: 1.5rem 0;
    border: 2px solid #2c5aa0;
}

.contact-method-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    padding: 1rem;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.contact-method-item:last-child {
    margin-bottom: 0;
}

.contact-method-item i {
    color: #2c5aa0;
    font-size: 1.5rem;
    width: 40px;
    text-align: center;
}

.contact-method-item strong {
    color: #2c5aa0;
    font-size: 1.1rem;
    display: block;
    margin-bottom: 0.3rem;
}

.contact-method-item p {
    margin: 0;
    color: #555;
}

.contact-method-item a {
    color: #2c5aa0;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.contact-method-item a:hover {
    color: #1e3d72;
    text-decoration: underline;
}

.response-info {
    background: #e8f4fd;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    margin: 1.5rem 0;
    border-left: 4px solid #17a2b8;
}

.response-info h4 {
    color: #2c5aa0;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.response-info p {
    margin: 0;
    color: #555;
    line-height: 1.6;
}

.inquiry-topics {
    background: #f8f9fa;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    border-left: 4px solid #28a745;
}

.inquiry-topics h4 {
    color: #2c5aa0;
    font-size: 1.1rem;
    margin-bottom: 0.8rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.inquiry-topics ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.inquiry-topics li {
    padding: 0.3rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: #555;
    line-height: 1.5;
}

.inquiry-topics li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #28a745;
    font-weight: bold;
}

/* Accommodation Section Styles */
.venue-full-container {
    max-width: none !important;
    width: 100% !important;
    padding: 0 2rem;
    margin: 0 !important;
}

.accommodation-section {
    margin-top: 2rem;
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    max-width: none !important;
    width: 100% !important;
}

.accommodation-section h3 {
    color: #2c5aa0;
    font-size: 1.4rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.accommodation-section h3::before {
    content: "🏨";
    font-size: 1.2rem;
}

.accommodation-section>p {
    color: #555;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.hotels-grid {
    width: 100% !important;
    max-width: none !important;
    margin-bottom: 1.5rem;
}

.hotels-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.hotel-row {
    width: 100%;
    margin-bottom: 1.5rem;
}

.hotel-card {
    background: #f8f9fa;
    border-radius: 10px;
    padding: 1.5rem;
    border-left: 4px solid #2c5aa0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hotel-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

.hotel-info h4 {
    color: #2c5aa0;
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.hotel-images-section {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.hotel-image {
    width: 300px;
    height: 200px;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    flex-shrink: 0;
}

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

.hotel-description {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 1rem;
    font-style: italic;
}

.hotel-details {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.detail-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-size: 0.9rem;
}

.detail-item i {
    color: #2c5aa0;
    width: 16px;
    text-align: center;
    flex-shrink: 0;
}

.detail-item span {
    color: #555;
    line-height: 1.4;
}

.accommodation-note {
    background: linear-gradient(135deg, #e8f4fd, #d1ecf1);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    border-left: 4px solid #17a2b8;
}

.accommodation-note p {
    margin: 0;
    color: #555;
    font-size: 0.9rem;
    line-height: 1.6;
}

.accommodation-note i {
    color: #17a2b8;
    margin-right: 0.5rem;
}


/* About Section Improved Styles */
.about {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: 3rem 0;
}

.about-content {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.about-text {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    border-left: 4px solid #2c5aa0;
}

.about-text p {
    margin-bottom: 1rem;
    line-height: 1.6;
    color: #555;
}

.about-text p:last-child {
    margin-bottom: 0;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.2rem;
    margin-top: 1rem;
}

.stat-item {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    border-top: 4px solid #28a745;
    transition: transform 0.3s ease;
}

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

.stat-item h3 {
    font-size: 2rem;
    font-weight: bold;
    color: #2c5aa0;
    margin-bottom: 0.5rem;
}

.stat-item p {
    color: #666;
    font-weight: 500;
    margin: 0;
}

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

.committee-content h3 {
    color: #2c5aa0;
    font-size: 1.4rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.committee-section {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    margin-bottom: 1.2rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    border-left: 4px solid #2c5aa0;
}

.committee-section h4 {
    color: #2c5aa0;
    font-size: 1.2rem;
    margin-bottom: 1rem;
    border-bottom: 2px solid #e9ecef;
    padding-bottom: 0.5rem;
}

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

.committee-member {
    background: #f8f9fa;
    padding: 1rem;
    border-radius: 8px;
    border-left: 3px solid #28a745;
}

.member-info h5 {
    color: #2c5aa0;
    font-size: 1.1rem;
    margin-bottom: 0.3rem;
}

.member-info p {
    color: #666;
    font-size: 0.9rem;
    margin: 0;
}

/* Tutorials Section Improved Styles */
.tutorials {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: 3rem 0;
}

.tutorials-content {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    max-width: 1000px;
    margin: 0 auto;
}

.tutorial-item {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    border-left: 5px solid #2c5aa0;
    transition: transform 0.3s ease;
}

.tutorial-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.tutorial-header {
    margin-bottom: 1rem;
}

.tutorial-header h3 {
    color: #2c5aa0;
    font-size: 1.3rem;
    margin-bottom: 0.8rem;
}

.tutorial-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1rem;
}

.tutorial-meta span {
    background: #f8f9fa;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    color: #666;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.tutorial-meta span i {
    color: #2c5aa0;
}

.tutorial-description p {
    color: #555;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.tutorial-details {
    background: #f8f9fa;
    padding: 1rem;
    border-radius: 8px;
    margin-top: 1rem;
}

.tutorial-details h4 {
    color: #2c5aa0;
    font-size: 1.1rem;
    margin-bottom: 0.8rem;
}

.tutorial-details ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.tutorial-details li {
    padding: 0.3rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: #555;
    line-height: 1.5;
}

.tutorial-details li::before {
    content: "▸";
    position: absolute;
    left: 0;
    color: #28a745;
    font-weight: bold;
}

/* Mobile Responsive for About, Tutorials, and Abstract Sections */
@media (max-width: 768px) {
    .step-description {
        padding-left: 0;
    }

    .step-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.8rem;
    }

    .instruction-step {
        padding: 1.2rem;
    }

    .deadline-box {
        padding: 1.2rem;
    }

    .deadline-date {
        font-size: 1.4rem;
    }

    .template-download {
        padding: 1.2rem;
    }

    .contact-info {
        padding: 1.2rem;
    }

    .about-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .about-stats {
        grid-template-columns: repeat(4, 1fr);
        gap: 1rem;
    }

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

    .tutorial-meta {
        flex-direction: column;
        gap: 0.5rem;
    }

    .tutorial-item {
        padding: 1.2rem;
    }

    .hotel-card {
        padding: 1.2rem;
    }

    .detail-item {
        font-size: 0.85rem;
    }
}