/* Modern Four Sections Grid Styles */
.main-sections-grid {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    position: relative;
}

.main-sections-grid::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23e2e8f0" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
    pointer-events: none;
}

.sections-wrapper {
    display: flex;
    flex-direction: column;
    gap: 3rem;
    position: relative;
    z-index: 1;
}

.section-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    width: 100%;
    max-width: none;
}

.section-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #3b82f6, #8b5cf6, #06b6d4, #10b981);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.section-card:hover::before {
    transform: scaleX(1);
}

.section-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.section-card[data-section="purpose"] {
    border-left: 4px solid #3b82f6;
}

.section-card[data-section="exhibition"] {
    border-left: 4px solid #8b5cf6;
}

.section-card[data-section="market"] {
    border-left: 4px solid #06b6d4;
}

.section-card[data-section="expand"] {
    border-left: 4px solid #10b981;
}

.section-header-modern {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 1px solid #e2e8f0;
}

.section-icon {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: white;
    position: relative;
    overflow: hidden;
}

.section-card[data-section="purpose"] .section-icon {
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
}

.section-card[data-section="exhibition"] .section-icon {
    background: linear-gradient(135deg, #8b5cf6, #7c3aed);
}

.section-card[data-section="market"] .section-icon {
    background: linear-gradient(135deg, #06b6d4, #0891b2);
}

.section-card[data-section="expand"] .section-icon {
    background: linear-gradient(135deg, #10b981, #059669);
}

.section-icon::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.6s ease;
}

.section-card:hover .section-icon::before {
    left: 100%;
}

.section-meta {
    flex: 1;
}

.section-number {
    display: inline-block;
    background: linear-gradient(135deg, #f1f5f9, #e2e8f0);
    color: #64748b;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.section-title {
    font-size: 20px;
    font-weight: 700;
    color: #1e293b;
    margin: 0;
    line-height: 1.3;
}

.section-content {
    animation: fadeInUp 0.6s ease forwards;
}

.article-header {
    margin-bottom: 20px;
}

.article-title {
    font-size: 18px;
    font-weight: 600;
    color: #1e293b;
    margin: 0 0 10px 0;
    line-height: 1.4;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #64748b;
    font-size: 14px;
}

.article-meta i {
    font-size: 12px;
}

.article-body {
    margin-bottom: 20px;
}

.article-description {
    color: #475569;
    line-height: 1.6;
    margin-bottom: 15px;
}

.article-content .content-text {
    color: #334155;
    line-height: 1.7;
}

.article-content .content-text h1,
.article-content .content-text h2,
.article-content .content-text h3,
.article-content .content-text h4,
.article-content .content-text h5,
.article-content .content-text h6 {
    color: #1e293b;
    margin-top: 20px;
    margin-bottom: 10px;
}

.article-content .content-text p {
    margin-bottom: 12px;
}

.article-content .content-text ul,
.article-content .content-text ol {
    margin-left: 20px;
    margin-bottom: 15px;
}

.article-image {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.responsive-image {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.3s ease;
}

.article-image:hover .responsive-image {
    transform: scale(1.05);
}

/* Default Content Styles */
.default-content {
    color: #475569;
    line-height: 1.6;
}

.info-grid {
    display: grid;
    gap: 20px;
    margin-top: 20px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background: #f8fafc;
    border-radius: 12px;
    border-left: 3px solid #3b82f6;
}

.info-item i {
    font-size: 20px;
    color: #3b82f6;
    width: 24px;
    text-align: center;
}

.info-details h5 {
    margin: 0 0 5px 0;
    font-weight: 600;
    color: #1e293b;
    font-size: 14px;
}

.info-details p {
    margin: 0;
    color: #64748b;
    font-size: 13px;
}

.market-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: linear-gradient(135deg, #f8fafc, #f1f5f9);
    border-radius: 12px;
    border: 1px solid #e2e8f0;
}

.stat-number {
    font-size: 24px;
    font-weight: 800;
    color: #06b6d4;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 12px;
    color: #64748b;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.expand-features {
    display: grid;
    gap: 20px;
    margin-top: 20px;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    padding: 20px;
    background: linear-gradient(135deg, #f0fdf4, #f7fee7);
    border-radius: 12px;
    border-left: 3px solid #10b981;
}

.feature-item i {
    font-size: 20px;
    color: #10b981;
    margin-top: 2px;
    width: 24px;
    text-align: center;
}

.feature-content h5 {
    margin: 0 0 8px 0;
    font-weight: 600;
    color: #1e293b;
    font-size: 15px;
}

.feature-content p {
    margin: 0;
    color: #64748b;
    font-size: 13px;
    line-height: 1.5;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .main-sections-grid {
        padding: 40px 0;
    }
    
    .sections-wrapper {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .section-card {
        padding: 20px;
    }
    
    .section-header-modern {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .section-icon {
        width: 50px;
        height: 50px;
        font-size: 20px;
    }
    
    .section-title {
        font-size: 18px;
    }
    
    .market-stats {
        grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
        gap: 15px;
    }
    
    .stat-number {
        font-size: 20px;
    }
}

@media (max-width: 480px) {
    .section-card {
        padding: 15px;
        border-radius: 15px;
    }
    
    .section-header-modern {
        gap: 10px;
        margin-bottom: 20px;
        padding-bottom: 15px;
    }
    
    .section-icon {
        width: 40px;
        height: 40px;
        font-size: 18px;
    }
    
    .section-title {
        font-size: 16px;
    }
    
    .article-title {
        font-size: 16px;
    }
    
    .market-stats {
        grid-template-columns: 1fr 1fr;
    }
    
    .info-item,
    .feature-item {
        padding: 15px;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    .main-sections-grid {
        background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    }
    
    .section-card {
        background: rgba(30, 41, 59, 0.95);
        border-color: rgba(255, 255, 255, 0.1);
    }
    
    .section-title,
    .article-title {
        color: #f1f5f9;
    }
    
    .article-description,
    .default-content {
        color: #cbd5e1;
    }
    
    .article-content .content-text {
        color: #e2e8f0;
    }
    
    .info-item {
        background: #1e293b;
        border-left-color: #3b82f6;
    }
    
    .feature-item {
        background: linear-gradient(135deg, #064e3b, #065f46);
    }
    
    .stat-item {
        background: linear-gradient(135deg, #1e293b, #334155);
        border-color: #475569;
    }
}