/**
 * Category Navigation Styles
 * 海量项目分类导航系统样式
 */

/* ==================== Container & Layout ==================== */
.category-navigation-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

/* ==================== Header ==================== */
.category-header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem 1rem;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(168, 85, 247, 0.1));
    border-radius: 1rem;
}

.category-header h2 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #6366f1, #a855f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.category-subtitle {
    font-size: 1.1rem;
    color: var(--md-default-fg-color--light);
    margin: 0;
}

.highlight-number {
    font-weight: 700;
    font-size: 1.3em;
    color: var(--md-primary-fg-color);
}

/* ==================== Controls ==================== */
.category-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
}

.search-box {
    flex: 1;
    min-width: 300px;
}

.search-input {
    width: 100%;
    padding: 0.875rem 1.25rem;
    font-size: 1rem;
    border: 2px solid var(--md-default-fg-color--lightest);
    border-radius: 0.75rem;
    background: var(--md-default-bg-color);
    color: var(--md-default-fg-color);
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.search-input:focus {
    outline: none;
    border-color: var(--md-primary-fg-color);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
    transform: translateY(-1px);
}

.view-toggles {
    display: flex;
    gap: 0.5rem;
    background: var(--md-default-bg-color);
    padding: 0.25rem;
    border-radius: 0.75rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.view-btn {
    padding: 0.625rem 1.25rem;
    border: none;
    background: transparent;
    color: var(--md-default-fg-color--light);
    cursor: pointer;
    border-radius: 0.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.view-btn:hover {
    background: var(--md-default-fg-color--lightest);
    color: var(--md-default-fg-color);
}

.view-btn.active {
    background: var(--md-primary-fg-color);
    color: white;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

/* ==================== Stats ==================== */
.category-stats {
    margin-bottom: 2.5rem;
    padding: 1.5rem;
    background: var(--md-default-bg-color);
    border-radius: 1rem;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
}

.category-stats h3 {
    margin: 0 0 1rem 0;
    font-size: 1.3rem;
}

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

.stat-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05), rgba(168, 85, 247, 0.05));
    border-radius: 0.75rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.15);
    border-color: var(--md-primary-fg-color);
}

.stat-name {
    font-weight: 500;
    font-size: 0.95rem;
}

.stat-count {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--md-primary-fg-color);
}

/* ==================== Category Grid ==================== */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 1.5rem;
}

.category-card {
    background: var(--md-default-bg-color);
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    transition: all 0.3s ease;
    border: 1px solid var(--md-default-fg-color--lightest);
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--md-primary-fg-color), var(--md-accent-fg-color));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.category-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    border-color: var(--md-primary-fg-color);
}

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

.category-card.highlight {
    animation: highlight-pulse 1s ease-in-out;
}

@keyframes highlight-pulse {
    0%, 100% {
        box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    }
    50% {
        box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.3);
    }
}

.category-card-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.category-icon {
    font-size: 2rem;
    line-height: 1;
}

.category-title {
    flex: 1;
    margin: 0;
    font-size: 1.3rem;
    font-weight: 600;
}

.project-count-badge {
    background: var(--md-primary-fg-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.85rem;
    font-weight: 600;
}

.category-description {
    color: var(--md-default-fg-color--light);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1.25rem;
}

/* ==================== Subcategories ==================== */
.subcategory-list {
    margin-bottom: 1rem;
}

.subcategory-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.625rem 0.875rem;
    margin-bottom: 0.5rem;
    background: var(--md-code-bg-color);
    border-radius: 0.5rem;
    transition: all 0.2s ease;
}

.subcategory-item:hover {
    background: var(--md-default-fg-color--lightest);
    transform: translateX(4px);
}

.subcategory-name {
    font-size: 0.9rem;
    font-weight: 500;
}

.subcategory-count {
    font-size: 0.85rem;
    color: var(--md-default-fg-color--light);
    background: var(--md-default-bg-color);
    padding: 0.125rem 0.5rem;
    border-radius: 0.75rem;
}

/* ==================== Project Preview ==================== */
.project-preview-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.project-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    border-radius: 0.5rem;
    color: var(--md-default-fg-color);
    text-decoration: none;
    transition: all 0.2s ease;
    font-size: 0.9rem;
}

.project-link:hover {
    background: var(--md-code-bg-color);
    color: var(--md-primary-fg-color);
    transform: translateX(4px);
}

.project-icon {
    font-size: 1rem;
}

/* ==================== Card Footer ==================== */
.category-card-footer {
    border-top: 1px solid var(--md-default-fg-color--lightest);
    padding-top: 1rem;
    margin-top: 1rem;
}

.expand-btn {
    width: 100%;
    padding: 0.75rem 1rem;
    background: transparent;
    border: 1px solid var(--md-primary-fg-color);
    color: var(--md-primary-fg-color);
    border-radius: 0.5rem;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
    font-size: 0.95rem;
}

.expand-btn:hover {
    background: var(--md-primary-fg-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

/* ==================== List View ==================== */
.category-grid.view-list {
    grid-template-columns: 1fr;
}

.project-list-view {
    background: var(--md-default-bg-color);
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.list-header {
    display: grid;
    grid-template-columns: 2fr 2fr 1fr;
    gap: 1rem;
    padding: 1rem 1.5rem;
    background: var(--md-code-bg-color);
    font-weight: 600;
    border-bottom: 2px solid var(--md-default-fg-color--lightest);
}

.list-row {
    display: grid;
    grid-template-columns: 2fr 2fr 1fr;
    gap: 1rem;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--md-default-fg-color--lightest);
    transition: all 0.2s ease;
}

.list-row:hover {
    background: var(--md-code-bg-color);
}

.list-col-project {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}

.list-col-category {
    color: var(--md-default-fg-color--light);
    font-size: 0.9rem;
}

.list-col-action {
    display: flex;
    justify-content: flex-end;
}

.btn-view {
    padding: 0.5rem 1rem;
    background: var(--md-primary-fg-color);
    color: white;
    border-radius: 0.5rem;
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.btn-view:hover {
    background: var(--md-accent-fg-color);
    transform: translateX(2px);
}

/* ==================== Tree View ==================== */
.category-grid.view-tree {
    grid-template-columns: 1fr;
}

.tree-view {
    background: var(--md-default-bg-color);
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.tree-node {
    margin-bottom: 1rem;
}

.tree-node-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: var(--md-code-bg-color);
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 600;
}

.tree-node-header:hover {
    background: var(--md-default-fg-color--lightest);
}

.tree-toggle {
    width: 1.5rem;
    text-align: center;
    transition: transform 0.2s ease;
}

.tree-node.collapsed .tree-toggle {
    transform: rotate(-90deg);
}

.tree-icon {
    font-size: 1.5rem;
}

.tree-label {
    flex: 1;
}

.tree-count {
    color: var(--md-default-fg-color--light);
    font-size: 0.9rem;
}

.tree-children {
    margin-left: 2.5rem;
    margin-top: 0.5rem;
    transition: all 0.3s ease;
}

.tree-node.collapsed .tree-children {
    display: none;
}

.tree-subnode {
    margin-bottom: 0.75rem;
}

.tree-subnode-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    cursor: pointer;
    font-weight: 500;
    border-radius: 0.375rem;
    transition: all 0.2s ease;
}

.tree-subnode-header:hover {
    background: var(--md-code-bg-color);
}

.tree-leaf {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    margin: 0.25rem 0;
    border-radius: 0.375rem;
    color: var(--md-default-fg-color);
    text-decoration: none;
    transition: all 0.2s ease;
}

.tree-leaf:hover {
    background: var(--md-code-bg-color);
    color: var(--md-primary-fg-color);
    transform: translateX(4px);
}

/* ==================== Modal ==================== */
.category-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: modal-fade-in 0.3s ease;
}

@keyframes modal-fade-in {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: var(--md-default-bg-color);
    border-radius: 1rem;
    max-width: 90vw;
    max-height: 90vh;
    width: 1000px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    display: flex;
    flex-direction: column;
    animation: modal-slide-up 0.3s ease;
}

@keyframes modal-slide-up {
    from {
        transform: translateY(30px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--md-default-fg-color--lightest);
}

.modal-header h2 {
    margin: 0;
    font-size: 1.75rem;
}

.modal-close {
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: var(--md-default-fg-color--light);
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.5rem;
    transition: all 0.2s ease;
}

.modal-close:hover {
    background: var(--md-code-bg-color);
    color: var(--md-default-fg-color);
}

.modal-body {
    padding: 2rem;
    overflow-y: auto;
    flex: 1;
}

.modal-description {
    font-size: 1.1rem;
    color: var(--md-default-fg-color--light);
    margin-bottom: 2rem;
}

.full-subcategories {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.subcategory-section h3 {
    margin: 0 0 1rem 0;
    font-size: 1.3rem;
    color: var(--md-primary-fg-color);
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 0.75rem;
}

.project-card {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: var(--md-code-bg-color);
    border-radius: 0.5rem;
    color: var(--md-default-fg-color);
    text-decoration: none;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.project-card:hover {
    background: var(--md-default-fg-color--lightest);
    color: var(--md-primary-fg-color);
    border-color: var(--md-primary-fg-color);
    transform: translateY(-2px);
}

.project-name {
    font-size: 0.9rem;
    font-weight: 500;
}

/* ==================== Responsive Design ==================== */
@media (max-width: 768px) {
    .category-header h2 {
        font-size: 1.75rem;
    }

    .category-subtitle {
        font-size: 1rem;
    }

    .category-controls {
        flex-direction: column;
        align-items: stretch;
    }

    .search-box {
        min-width: 100%;
    }

    .view-toggles {
        width: 100%;
        justify-content: space-between;
    }

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

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

    .list-header,
    .list-row {
        grid-template-columns: 2fr 1fr;
    }

    .list-col-action {
        grid-column: 1 / -1;
        justify-content: flex-start;
        margin-top: 0.5rem;
    }

    .modal-content {
        max-width: 95vw;
        max-height: 95vh;
    }

    .modal-body {
        padding: 1.5rem;
    }

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

@media (max-width: 480px) {
    .category-navigation-container {
        padding: 1rem 0.5rem;
    }

    .category-header {
        padding: 1.5rem 1rem;
    }

    .view-btn {
        padding: 0.5rem 0.75rem;
        font-size: 0.85rem;
    }

    .view-btn span {
        display: none;
    }
}

/* ==================== Dark Mode Enhancements ==================== */
[data-md-color-scheme="slate"] .category-card {
    background: rgba(255, 255, 255, 0.05);
}

[data-md-color-scheme="slate"] .search-input {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.1);
}

[data-md-color-scheme="slate"] .search-input:focus {
    background: rgba(255, 255, 255, 0.08);
}

[data-md-color-scheme="slate"] .modal-content {
    background: var(--md-default-bg-color);
}