/* ==========================================
   Encyclopedia styles
   ========================================== */

.encyclopedia-page {
    padding: 32px 0 64px;
}

.encyclopedia-header {
    margin-bottom: 32px;
}

.encyclopedia-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: #1a1a2e;
}

.encyclopedia-subtitle {
    font-size: 1.1rem;
    color: #6b7280;
    margin-bottom: 0;
}

.encyclopedia-category-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: 8px;
}

.encyclopedia-section {
    margin-bottom: 48px;
}

.encyclopedia-section-title {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: #1a1a2e;
}

/* ==========================================
   Category tiles grid
   ========================================== */

.encyclopedia-categories {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

@media (max-width: 1024px) {
    .encyclopedia-categories {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .encyclopedia-categories {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
}

@media (max-width: 480px) {
    .encyclopedia-categories {
        grid-template-columns: 1fr;
    }
}

.encyclopedia-tile {
    display: flex;
    flex-direction: column;
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    transition: box-shadow 0.2s, transform 0.2s;
}

.encyclopedia-tile:hover {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.10);
    transform: translateY(-2px);
    text-decoration: none;
    color: inherit;
}

.encyclopedia-tile-image {
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: #f3f4f6;
}

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

.encyclopedia-tile-body {
    padding: 16px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.encyclopedia-tile-icon {
    font-size: 1.8rem;
}

.encyclopedia-tile-name {
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
    color: #1a1a2e;
}

.encyclopedia-tile-desc {
    font-size: 0.875rem;
    color: #6b7280;
    margin: 0;
    line-height: 1.4;
}

.encyclopedia-tile-count {
    font-size: 0.8rem;
    color: #9ca3af;
    margin-top: auto;
}

/* ==========================================
   Popular article cards
   ========================================== */

.encyclopedia-popular {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

@media (max-width: 768px) {
    .encyclopedia-popular {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .encyclopedia-popular {
        grid-template-columns: 1fr;
    }
}

.encyclopedia-article-card {
    display: block;
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 10px;
    text-decoration: none;
    color: inherit;
    transition: box-shadow 0.2s;
}

.encyclopedia-article-card:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
    text-decoration: none;
    color: inherit;
}

.encyclopedia-article-card-body {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.encyclopedia-article-card-cat {
    font-size: 0.75rem;
    color: #6366f1;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.encyclopedia-article-card-title {
    font-size: 0.95rem;
    font-weight: 600;
    margin: 0;
    color: #1a1a2e;
    line-height: 1.4;
}

.encyclopedia-article-card-preview {
    font-size: 0.85rem;
    color: #6b7280;
    margin: 0;
    line-height: 1.4;
}

/* ==========================================
   Article list (category page)
   ========================================== */

.encyclopedia-article-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.encyclopedia-article-list-item {
    padding: 12px 16px;
    background: #f9fafb;
    border-radius: 8px;
    border-left: 3px solid #6366f1;
}

.encyclopedia-article-list-item a {
    font-weight: 500;
    color: #1a1a2e;
    text-decoration: none;
}

.encyclopedia-article-list-item a:hover {
    color: #6366f1;
    text-decoration: underline;
}

.encyclopedia-article-list-preview {
    font-size: 0.85rem;
    color: #6b7280;
    margin: 4px 0 0;
}

.encyclopedia-group-count {
    font-size: 0.85rem;
    font-weight: 400;
}

.encyclopedia-empty {
    color: #9ca3af;
    font-size: 1rem;
    padding: 32px 0;
}

/* ==========================================
   Breadcrumb
   ========================================== */

.encyclopedia-breadcrumb {
    margin-bottom: 20px;
}

/* ==========================================
   Article detail layout
   ========================================== */

.encyclopedia-article-layout {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 40px;
    align-items: start;
}

@media (max-width: 1024px) {
    .encyclopedia-article-layout {
        grid-template-columns: 1fr;
    }
    .encyclopedia-sidebar {
        display: none;
    }
}

.encyclopedia-article-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: #1a1a2e;
}

.encyclopedia-article-preview-text {
    font-size: 1.05rem;
    color: #4b5563;
    margin-bottom: 24px;
    border-left: 3px solid #6366f1;
    padding-left: 16px;
    font-style: italic;
}

.encyclopedia-article-content {
    font-size: 1rem;
    line-height: 1.75;
    color: #374151;
}

.encyclopedia-article-content h2 {
    font-size: 1.4rem;
    font-weight: 600;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
}

.encyclopedia-article-content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
}

.encyclopedia-article-content p {
    margin-bottom: 1rem;
}

.encyclopedia-article-content ul,
.encyclopedia-article-content ol {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

.encyclopedia-article-meta {
    margin-top: 32px;
    padding-top: 16px;
    border-top: 1px solid #e5e7eb;
    display: flex;
    gap: 20px;
    font-size: 0.85rem;
    color: #9ca3af;
}

/* ==========================================
   Sidebar
   ========================================== */

.encyclopedia-sidebar {
    background: #f9fafb;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    padding: 20px;
    position: sticky;
    top: 16px;
}

.encyclopedia-sidebar-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 14px;
    color: #1a1a2e;
}

.encyclopedia-sidebar-list {
    list-style: none;
    padding: 0;
    margin: 0 0 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.encyclopedia-sidebar-item a {
    font-size: 0.9rem;
    color: #374151;
    text-decoration: none;
    line-height: 1.4;
}

.encyclopedia-sidebar-item a:hover {
    color: #6366f1;
    text-decoration: underline;
}

.encyclopedia-sidebar-all {
    font-size: 0.875rem;
    color: #6366f1;
    text-decoration: none;
    font-weight: 500;
}

.encyclopedia-sidebar-all:hover {
    text-decoration: underline;
}