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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: #F9FAFB;
    color: #111827;
    line-height: 1.6;
}

.site-header {
    background-color: #FFFFFF;
    border-bottom: 1px solid #E5E7EB;
    padding: 1.5rem 0;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.portal-title {
    font-size: 2rem;
    font-weight: 700;
    color: #111827;
    letter-spacing: -0.02em;
}

.main-wrapper {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    display: flex;
    gap: 2rem;
    align-items: flex-start;
}

.content-area {
    flex: 0 0 70%;
    min-width: 0;
}

.navigation-menu {
    background-color: #FFFFFF;
    border: 1px solid #E5E7EB;
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 2rem;
}

.navigation-menu summary {
    font-weight: 600;
    color: #111827;
    cursor: pointer;
    padding: 0.5rem;
    list-style: none;
}

.navigation-menu summary::-webkit-details-marker {
    display: none;
}

.navigation-menu summary::before {
    content: '▶';
    display: inline-block;
    margin-right: 0.5rem;
    transition: transform 0.2s;
}

.navigation-menu[open] summary::before {
    transform: rotate(90deg);
}

.navigation-menu ul {
    list-style: none;
    margin-top: 1rem;
    padding-left: 1.5rem;
}

.navigation-menu li {
    padding: 0.5rem 0;
    color: #374151;
}

.content-body {
    background-color: #FFFFFF;
    border: 1px solid #E5E7EB;
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 2rem;
    min-height: 200px;
}

.visual-gallery {
    background-color: #FFFFFF;
    border: 1px solid #E5E7EB;
    border-radius: 8px;
    padding: 2rem;
}

.widget-header {
    font-size: 1.25rem;
    font-weight: 600;
    color: #3B82F6;
    margin-bottom: 1.5rem;
    letter-spacing: -0.01em;
}

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

.gallery-item {
    border-radius: 8px;
    overflow: hidden;
    aspect-ratio: 4 / 3;
    background-color: #F3F4F6;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.sidebar-area {
    flex: 0 0 30%;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.sidebar-widget {
    background-color: #FFFFFF;
    border: 1px solid #E5E7EB;
    border-radius: 8px;
    padding: 1.5rem;
}

.widget-categories .category-list {
    list-style: none;
}

.category-item {
    margin-bottom: 0.75rem;
}

.category-link {
    display: block;
    padding: 0.75rem 1rem;
    background-color: #F9FAFB;
    border-radius: 6px;
    color: #374151;
    font-weight: 500;
    cursor: default;
    transition: background-color 0.2s, color 0.2s;
}

.category-link:hover {
    background-color: #EFF6FF;
    color: #3B82F6;
}

.widget-posts {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.post-card {
    border: 1px solid #E5E7EB;
    border-radius: 8px;
    overflow: hidden;
    cursor: default;
    transition: filter 0.2s, transform 0.2s;
}

.post-card:hover {
    filter: brightness(0.9);
    transform: translateY(-2px);
}

.post-title {
    padding: 1rem;
    font-weight: 500;
    color: #111827;
    font-size: 0.95rem;
    line-height: 1.4;
}

.widget-newsletter {
    background: linear-gradient(135deg, #3B82F6 0%, #2563EB 100%);
    color: #FFFFFF;
    border: none;
}

.widget-newsletter .widget-header {
    color: #FFFFFF;
}

.newsletter-text {
    color: #EFF6FF;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.newsletter-form {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.fake-input {
    padding: 0.875rem 1rem;
    background-color: #FFFFFF;
    border-radius: 6px;
    color: #9CA3AF;
    font-size: 0.95rem;
    cursor: default;
}

.fake-button {
    padding: 0.875rem 1.5rem;
    background-color: #111827;
    color: #FFFFFF;
    border-radius: 6px;
    text-align: center;
    font-weight: 600;
    cursor: default;
    transition: background-color 0.2s, transform 0.2s;
}

.fake-button:hover {
    background-color: #1F2937;
    transform: scale(1.02);
}

.site-footer {
    background-color: #FFFFFF;
    border-top: 1px solid #E5E7EB;
    padding: 2rem 0;
    margin-top: 3rem;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    text-align: center;
}

.footer-text {
    color: #6B7280;
    font-size: 0.9rem;
}

.footer-text a {
    color: #3B82F6;
    text-decoration: none;
}

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

@media (max-width: 768px) {
    .main-wrapper {
        flex-direction: column;
        padding: 1rem;
    }

    .content-area {
        flex: 1;
    }

    .sidebar-area {
        flex: 1;
    }

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