/* ========================================
   3D Files Download Page Styles
   ======================================== */

/* Search Section */
.search-wrapper {
    max-width: 600px;
    margin: 0 auto;
}

.search-box {
    position: relative;
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    transition: var(--transition-normal);
}

.search-box:focus-within {
    box-shadow: var(--shadow-xl);
    transform: translateY(-2px);
}

.search-input {
    border: none;
    padding: 1.25rem 4rem 1.25rem 1.5rem;
    font-size: var(--font-size-lg);
    background: transparent;
    color: var(--text-primary);
}

.search-input:focus {
    outline: none;
    box-shadow: none;
}

.search-input::placeholder {
    color: var(--text-muted);
}

.search-btn {
    position: absolute;
    right: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    width: 3rem;
    height: 3rem;
    border: none;
    background: var(--primary-color);
    color: var(--text-white);
    border-radius: var(--radius-full);
    font-size: 1.25rem;
    transition: var(--transition-fast);
    cursor: pointer;
}

.search-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-50%) scale(1.05);
}

.search-results-info {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* Category Navigation */
.category-nav-wrapper {
    background: var(--bg-light);
    padding: 1rem;
    border-radius: var(--radius-lg);
}

.category-nav {
    gap: 1rem;
    flex-wrap: wrap;
}

.category-nav .nav-link {
    background: var(--bg-white);
    color: var(--text-secondary);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    padding: 0.75rem 1.5rem;
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.category-nav .nav-link:hover {
    color: var(--primary-color);
    border-color: var(--primary-alpha-20);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.category-nav .nav-link.active {
    background: var(--primary-color);
    color: var(--text-white);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.category-nav .nav-link .badge {
    background: var(--primary-alpha-20);
    color: var(--primary-dark);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 600;
    margin-left: 0.5rem;
}

.category-nav .nav-link.active .badge {
    background: rgba(255, 255, 255, 0.2);
    color: var(--text-white);
}

/* Subcategory Navigation */
.subcategory-nav-wrapper {
    background: var(--bg-white);
    padding: 1rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.subcategory-nav {
    border-bottom: none;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.subcategory-nav .nav-link {
    border: 1px solid var(--border-light);
    border-bottom: 2px solid transparent;
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    padding: 0.5rem 1rem;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    background: var(--bg-light);
    transition: var(--transition-fast);
}

.subcategory-nav .nav-link:hover {
    color: var(--primary-color);
    background: var(--bg-white);
    border-bottom-color: var(--primary-alpha-20);
}

.subcategory-nav .nav-link.active {
    color: var(--primary-color);
    background: var(--bg-white);
    border-color: var(--border-light);
    border-bottom-color: var(--primary-color);
    font-weight: 600;
}

/* File Cards */
.file-card {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.file-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.file-card-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-alpha-10);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    transition: var(--transition-fast);
}

.file-card:hover .file-card-icon {
    background: var(--primary-alpha-20);
    transform: scale(1.1);
}

.file-card-icon i {
    font-size: 2rem;
    color: var(--primary-color);
}

.file-card-body {
    flex: 1;
}

.file-card-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.file-card-series {
    font-size: var(--font-size-sm);
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.file-card-desc {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.file-card-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-light);
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

.file-card-meta .file-type {
    background: var(--bg-light);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    font-weight: 600;
}

.file-card-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}

.file-card-actions .btn {
    flex: 1;
    padding: 0.5rem 1rem;
    font-size: var(--font-size-sm);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.btn-preview {
    background: var(--bg-light);
    color: var(--text-secondary);
    border: 1px solid var(--border-light);
}

.btn-preview:hover {
    background: var(--primary-alpha-10);
    color: var(--primary-color);
    border-color: var(--primary-alpha-20);
}

.btn-download {
    background: var(--primary-color);
    color: var(--text-white);
    border: 1px solid var(--primary-color);
}

.btn-download:hover {
    background: var(--primary-hover);
    border-color: var(--primary-hover);
    transform: translateY(-1px);
}

/* Loading State */
.files-loading {
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* No Results */
.no-results-wrapper {
    min-height: 300px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.no-results-wrapper i {
    font-size: 4rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.no-results-wrapper h4 {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

/* Modal Styles */
.preview-placeholder {
    min-height: 400px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--bg-light);
    border-radius: var(--radius-md);
}

.preview-placeholder i {
    font-size: 5rem;
    color: var(--text-muted);
}

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

.file-card {
    animation: fadeInUp 0.5s ease-out;
    animation-fill-mode: both;
}

/* Responsive */
@media (max-width: 768px) {
    .category-nav {
        justify-content: flex-start;
        overflow-x: auto;
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 0.5rem;
    }

    .category-nav .nav-link {
        white-space: nowrap;
        font-size: var(--font-size-sm);
        padding: 0.5rem 1rem;
    }

    .subcategory-nav {
        overflow-x: auto;
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
    }

    .file-card {
        padding: 1rem;
    }

    .file-card-actions {
        flex-direction: column;
    }

    .file-card-actions .btn {
        width: 100%;
    }
}

/* Highlight Search Results */
.search-highlight {
    background: var(--warning-color);
    color: var(--text-primary);
    padding: 0 0.25rem;
    border-radius: 2px;
}







/* 预览提示 */
.preview-notice {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    text-align: center;
    margin-top: 0.5rem;
    padding: 0.25rem 0.5rem;
    background: var(--bg-light);
    border-radius: var(--radius-sm);
}



/* 响应式调整 */
@media (max-width: 768px) {

    .preview-notice {
        font-size: 0.75rem;
    }
}