/* ==========================================================================
   Sitemap Extractor Pro v2 — Styles
   Complete theme with dark mode, tabs, treemap, charts & more
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS Custom Properties — Light Mode (default)
   -------------------------------------------------------------------------- */
:root {
    /* Brand */
    --sep-primary: #4f46e5;
    --sep-primary-hover: #4338ca;
    --sep-primary-light: #eef2ff;
    --sep-primary-subtle: #c7d2fe;

    /* Semantic */
    --sep-success: #059669;
    --sep-success-light: #d1fae5;
    --sep-danger: #dc2626;
    --sep-danger-light: #fee2e2;
    --sep-warning: #d97706;
    --sep-warning-light: #fef3c7;

    /* Gray scale */
    --sep-gray-50: #f9fafb;
    --sep-gray-100: #f3f4f6;
    --sep-gray-200: #e5e7eb;
    --sep-gray-300: #d1d5db;
    --sep-gray-400: #9ca3af;
    --sep-gray-500: #6b7280;
    --sep-gray-600: #4b5563;
    --sep-gray-700: #374151;
    --sep-gray-800: #1f2937;
    --sep-gray-900: #111827;

    /* Surface */
    --sep-bg: #fff;
    --sep-bg-secondary: #f9fafb;
    --sep-text: #1f2937;
    --sep-text-secondary: #6b7280;
    --sep-border: #e5e7eb;

    /* Shared design tokens */
    --sep-radius: 12px;
    --sep-radius-sm: 8px;
    --sep-radius-xs: 6px;
    --sep-shadow: 0 1px 3px rgba(0, 0, 0, .1), 0 1px 2px rgba(0, 0, 0, .06);
    --sep-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);
    --sep-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05);
    --sep-transition: .2s ease;
}

/* --------------------------------------------------------------------------
   2. Dark Mode Overrides
   -------------------------------------------------------------------------- */
.sep-app.dark {
    --sep-bg: #0f172a;
    --sep-bg-secondary: #1e293b;
    --sep-text: #f1f5f9;
    --sep-text-secondary: #94a3b8;
    --sep-border: #334155;

    --sep-gray-50: #1e293b;
    --sep-gray-100: #1e293b;
    --sep-gray-200: #334155;
    --sep-gray-300: #475569;
    --sep-gray-400: #64748b;
    --sep-gray-500: #94a3b8;
    --sep-gray-600: #cbd5e1;
    --sep-gray-700: #e2e8f0;
    --sep-gray-800: #f1f5f9;
    --sep-gray-900: #f8fafc;

    --sep-primary-light: rgba(79, 70, 229, .15);
    --sep-primary-subtle: rgba(99, 102, 241, .35);
    --sep-success-light: rgba(5, 150, 105, .15);
    --sep-danger-light: rgba(220, 38, 38, .15);
    --sep-warning-light: rgba(217, 119, 6, .15);

    --sep-shadow: 0 1px 3px rgba(0, 0, 0, .3), 0 1px 2px rgba(0, 0, 0, .2);
    --sep-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .3), 0 2px 4px -1px rgba(0, 0, 0, .2);
    --sep-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .4), 0 4px 6px -2px rgba(0, 0, 0, .25);
}

/* --------------------------------------------------------------------------
   3. Reset & App Container
   -------------------------------------------------------------------------- */
.sep-app * {
    box-sizing: border-box;
}

.sep-app {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--sep-text);
    background: var(--sep-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    transition: background var(--sep-transition), color var(--sep-transition);
}

/* --------------------------------------------------------------------------
   4. Header
   -------------------------------------------------------------------------- */
.sep-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--sep-border);
    position: relative;
}

.sep-header-icon {
    flex-shrink: 0;
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--sep-primary);
    color: #fff;
    border-radius: var(--sep-radius);
    box-shadow: var(--sep-shadow-md);
}

.sep-title {
    font-size: 24px;
    font-weight: 700;
    margin: 0 0 2px;
    color: var(--sep-gray-900);
}

.sep-subtitle {
    font-size: 14px;
    color: var(--sep-text-secondary);
    margin: 0;
}

/* --------------------------------------------------------------------------
   5. Dark Mode Toggle Button
   -------------------------------------------------------------------------- */
.sep-dark-toggle {
    position: absolute;
    top: 0;
    right: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--sep-border);
    background: var(--sep-bg);
    color: var(--sep-text-secondary);
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--sep-transition);
    box-shadow: var(--sep-shadow);
}

.sep-dark-toggle:hover {
    background: var(--sep-gray-100);
    color: var(--sep-primary);
    border-color: var(--sep-primary-subtle);
    transform: rotate(15deg);
}

.sep-dark-toggle svg {
    width: 20px;
    height: 20px;
}

/* --------------------------------------------------------------------------
   6. Mode Toggle (sitemap / URL)
   -------------------------------------------------------------------------- */
.sep-mode-toggle {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.sep-mode-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: 1px solid var(--sep-border);
    background: var(--sep-bg);
    border-radius: 999px;
    font-size: 13px;
    font-weight: 500;
    color: var(--sep-text-secondary);
    cursor: pointer;
    transition: all var(--sep-transition);
}

.sep-mode-btn:hover {
    border-color: var(--sep-primary-subtle);
    color: var(--sep-primary);
    background: var(--sep-primary-light);
}

.sep-mode-btn.active {
    background: var(--sep-primary);
    color: #fff;
    border-color: var(--sep-primary);
}

/* --------------------------------------------------------------------------
   7. Input Section
   -------------------------------------------------------------------------- */
.sep-input-section {
    background: var(--sep-bg);
    border: 1px solid var(--sep-border);
    border-radius: var(--sep-radius);
    padding: 24px;
    box-shadow: var(--sep-shadow);
    margin-bottom: 24px;
}

.sep-input-row {
    display: flex;
    gap: 12px;
}

.sep-input-wrapper {
    flex: 1;
    position: relative;
}

.sep-input-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--sep-gray-400);
    pointer-events: none;
}

.sep-url-input {
    width: 100%;
    padding: 12px 14px 12px 44px;
    border: 2px solid var(--sep-border);
    border-radius: var(--sep-radius-sm);
    font-size: 15px;
    color: var(--sep-text);
    background: var(--sep-bg-secondary);
    transition: all var(--sep-transition);
    outline: none;
}

.sep-url-input:focus {
    border-color: var(--sep-primary);
    background: var(--sep-bg);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, .1);
}

.sep-url-input::placeholder {
    color: var(--sep-gray-400);
}

.sep-extract-btn {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    background: var(--sep-primary);
    color: #fff;
    border: none;
    border-radius: var(--sep-radius-sm);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--sep-transition);
    white-space: nowrap;
}

.sep-extract-btn:hover {
    background: var(--sep-primary-hover);
    box-shadow: var(--sep-shadow-md);
    transform: translateY(-1px);
}

.sep-extract-btn:active {
    transform: translateY(0);
}

.sep-extract-btn:disabled {
    opacity: .6;
    cursor: not-allowed;
    transform: none;
}

.sep-hint {
    font-size: 12px;
    color: var(--sep-gray-400);
    margin: 10px 0 0;
}

/* --------------------------------------------------------------------------
   8. Spinner
   -------------------------------------------------------------------------- */
@keyframes sep-spin {
    to { transform: rotate(360deg); }
}

.sep-spinner {
    animation: sep-spin .8s linear infinite;
}

/* --------------------------------------------------------------------------
   9. Progress Bar
   -------------------------------------------------------------------------- */
.sep-progress {
    margin-bottom: 24px;
}

.sep-progress-bar {
    height: 6px;
    background: var(--sep-gray-100);
    border-radius: 999px;
    overflow: hidden;
}

.sep-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--sep-primary), #818cf8);
    border-radius: 999px;
    width: 0%;
    transition: width .4s ease;
    animation: sep-progress-indeterminate 1.5s ease-in-out infinite;
}

@keyframes sep-progress-indeterminate {
    0%   { width: 5%;  margin-left: 0; }
    50%  { width: 40%; margin-left: 30%; }
    100% { width: 5%;  margin-left: 95%; }
}

.sep-progress-fill.determinate {
    animation: none;
    margin-left: 0;
}

.sep-progress-text {
    font-size: 13px;
    color: var(--sep-text-secondary);
    margin: 8px 0 0;
    text-align: center;
}

/* --------------------------------------------------------------------------
   10. Error
   -------------------------------------------------------------------------- */
.sep-error {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 18px;
    background: var(--sep-danger-light);
    border: 1px solid #fca5a5;
    border-radius: var(--sep-radius-sm);
    color: var(--sep-danger);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 24px;
}

.sep-app.dark .sep-error {
    border-color: rgba(220, 38, 38, .3);
}

/* --------------------------------------------------------------------------
   11. Stats Cards Grid
   -------------------------------------------------------------------------- */
.sep-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 28px;
}

.sep-stat-card {
    background: var(--sep-bg);
    border: 1px solid var(--sep-border);
    border-radius: var(--sep-radius);
    padding: 20px;
    text-align: center;
    box-shadow: var(--sep-shadow);
    transition: all var(--sep-transition);
}

.sep-stat-card:hover {
    box-shadow: var(--sep-shadow-md);
    transform: translateY(-2px);
}

.sep-stat-number {
    font-size: 32px;
    font-weight: 800;
    color: var(--sep-primary);
    line-height: 1.1;
}

.sep-stat-label {
    font-size: 13px;
    color: var(--sep-text-secondary);
    margin-top: 4px;
    font-weight: 500;
}

.sep-stat-card.success .sep-stat-number { color: var(--sep-success); }
.sep-stat-card.warning .sep-stat-number { color: var(--sep-warning); }

/* --------------------------------------------------------------------------
   12. Section & Section Title
   -------------------------------------------------------------------------- */
.sep-section {
    margin-bottom: 28px;
}

.sep-section-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 16px;
    font-weight: 700;
    color: var(--sep-gray-800);
    margin: 0 0 12px;
}

.sep-section-title svg {
    flex-shrink: 0;
    color: var(--sep-primary);
}

/* --------------------------------------------------------------------------
   13. Sitemaps Found List
   -------------------------------------------------------------------------- */
.sep-sitemaps-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sep-sitemap-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--sep-bg-secondary);
    border: 1px solid var(--sep-border);
    border-radius: var(--sep-radius-sm);
    padding: 12px 16px;
    font-size: 13px;
    transition: all var(--sep-transition);
}

.sep-sitemap-item:hover {
    background: var(--sep-primary-light);
    border-color: var(--sep-primary-subtle);
}

.sep-sitemap-url {
    color: var(--sep-primary);
    word-break: break-all;
    font-weight: 500;
    text-decoration: none;
}

.sep-sitemap-url:hover {
    text-decoration: underline;
}

.sep-sitemap-badge {
    flex-shrink: 0;
    padding: 3px 10px;
    background: var(--sep-primary);
    color: #fff;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 600;
    margin-left: 12px;
}

/* --------------------------------------------------------------------------
   14. Cache Badge
   -------------------------------------------------------------------------- */
.sep-cache-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 10px;
    background: var(--sep-warning-light);
    color: var(--sep-warning);
    border: 1px solid rgba(217, 119, 6, .25);
    border-radius: 999px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: .01em;
    transition: all var(--sep-transition);
}

.sep-cache-badge svg {
    width: 12px;
    height: 12px;
}

/* --------------------------------------------------------------------------
   15. Tabs Navigation
   -------------------------------------------------------------------------- */
.sep-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 24px;
    padding: 4px;
    background: var(--sep-bg-secondary);
    border: 1px solid var(--sep-border);
    border-radius: var(--sep-radius);
}

.sep-tab {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 18px;
    background: transparent;
    border: none;
    border-radius: var(--sep-radius-sm);
    font-size: 13px;
    font-weight: 500;
    color: var(--sep-text-secondary);
    cursor: pointer;
    transition: all var(--sep-transition);
    white-space: nowrap;
}

.sep-tab:hover {
    background: var(--sep-bg);
    color: var(--sep-text);
    box-shadow: var(--sep-shadow);
}

.sep-tab.active {
    background: var(--sep-primary);
    color: #fff;
    box-shadow: var(--sep-shadow-md);
}

.sep-tab svg {
    width: 15px;
    height: 15px;
    flex-shrink: 0;
}

.sep-tab-content {
    display: none;
}

.sep-tab-content.active {
    display: block;
    animation: sep-fade-in .25s ease;
}

@keyframes sep-fade-in {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* --------------------------------------------------------------------------
   16. Toolbar
   -------------------------------------------------------------------------- */
.sep-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 20px;
    padding: 16px;
    background: var(--sep-bg);
    border: 1px solid var(--sep-border);
    border-radius: var(--sep-radius);
    box-shadow: var(--sep-shadow);
}

.sep-toolbar-left {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
}

.sep-toolbar-right {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
}

.sep-search-box {
    position: relative;
}

.sep-search-box svg {
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--sep-gray-400);
}

.sep-filter-input {
    padding: 8px 12px 8px 32px;
    border: 1px solid var(--sep-border);
    border-radius: var(--sep-radius-xs);
    font-size: 13px;
    width: 200px;
    color: var(--sep-text);
    background: var(--sep-bg);
    outline: none;
    transition: all var(--sep-transition);
}

.sep-filter-input:focus {
    border-color: var(--sep-primary);
    box-shadow: 0 0 0 2px rgba(79, 70, 229, .1);
}

/* Unified select styling */
.sep-select {
    padding: 8px 12px;
    border: 1px solid var(--sep-border);
    border-radius: var(--sep-radius-xs);
    font-size: 13px;
    color: var(--sep-gray-700);
    background: var(--sep-bg);
    outline: none;
    cursor: pointer;
    transition: all var(--sep-transition);
    -webkit-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%236b7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3 5l3 3 3-3'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    padding-right: 28px;
}

.sep-select:focus {
    border-color: var(--sep-primary);
    box-shadow: 0 0 0 2px rgba(79, 70, 229, .1);
}

/* Legacy select classes — map to .sep-select for backward compat */
.sep-category-filter,
.sep-depth-filter,
.sep-sort-select {
    padding: 8px 12px;
    border: 1px solid var(--sep-border);
    border-radius: var(--sep-radius-xs);
    font-size: 13px;
    color: var(--sep-gray-700);
    background: var(--sep-bg);
    outline: none;
    cursor: pointer;
    transition: all var(--sep-transition);
}

.sep-category-filter:focus,
.sep-depth-filter:focus,
.sep-sort-select:focus {
    border-color: var(--sep-primary);
}

.sep-url-count {
    font-size: 13px;
    font-weight: 600;
    color: var(--sep-text-secondary);
    padding: 0 8px;
}

.sep-action-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    border: 1px solid var(--sep-border);
    background: var(--sep-bg);
    border-radius: var(--sep-radius-xs);
    font-size: 13px;
    font-weight: 500;
    color: var(--sep-text-secondary);
    cursor: pointer;
    transition: all var(--sep-transition);
}

.sep-action-btn:hover {
    background: var(--sep-gray-50);
    border-color: var(--sep-gray-300);
}

.sep-copy-btn:hover {
    background: var(--sep-primary-light);
    border-color: var(--sep-primary-subtle);
    color: var(--sep-primary);
}

.sep-export-btn:hover {
    background: var(--sep-success-light);
    border-color: #6ee7b7;
    color: var(--sep-success);
}

/* --------------------------------------------------------------------------
   17. Export Dropdown Menu
   -------------------------------------------------------------------------- */
.sep-export-dropdown {
    position: relative;
    display: inline-flex;
}

.sep-export-menu {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    min-width: 180px;
    background: var(--sep-bg);
    border: 1px solid var(--sep-border);
    border-radius: var(--sep-radius-sm);
    box-shadow: var(--sep-shadow-lg);
    z-index: 100;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: all .15s ease;
    overflow: hidden;
}

.sep-export-dropdown.open .sep-export-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.sep-export-option {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 10px 16px;
    border: none;
    background: transparent;
    font-size: 13px;
    font-weight: 500;
    color: var(--sep-text);
    cursor: pointer;
    transition: background var(--sep-transition);
    text-align: left;
}

.sep-export-option:hover {
    background: var(--sep-primary-light);
    color: var(--sep-primary);
}

.sep-export-option svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    color: var(--sep-text-secondary);
}

.sep-export-option:hover svg {
    color: var(--sep-primary);
}

/* --------------------------------------------------------------------------
   18. Link Button
   -------------------------------------------------------------------------- */
.sep-link-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 10px;
    background: transparent;
    border: none;
    color: var(--sep-primary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    border-radius: var(--sep-radius-xs);
    transition: all var(--sep-transition);
    text-decoration: none;
}

.sep-link-btn:hover {
    background: var(--sep-primary-light);
    text-decoration: none;
}

.sep-link-btn svg {
    width: 14px;
    height: 14px;
}

/* --------------------------------------------------------------------------
   19. Category Cards Grid
   -------------------------------------------------------------------------- */
.sep-categories-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}

.sep-category-card {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--sep-bg);
    border: 1px solid var(--sep-border);
    border-radius: 999px;
    font-size: 13px;
    font-weight: 500;
    color: var(--sep-gray-700);
    cursor: pointer;
    transition: all var(--sep-transition);
    user-select: none;
}

.sep-category-card:hover {
    background: var(--sep-primary-light);
    border-color: var(--sep-primary-subtle);
    color: var(--sep-primary);
}

.sep-category-card.active {
    background: var(--sep-primary);
    border-color: var(--sep-primary);
    color: #fff;
}

.sep-category-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 24px;
    height: 22px;
    padding: 0 6px;
    background: var(--sep-gray-100);
    border-radius: 999px;
    font-size: 11px;
    font-weight: 700;
    color: var(--sep-gray-600);
}

.sep-category-card.active .sep-category-count {
    background: rgba(255, 255, 255, .25);
    color: #fff;
}

/* --------------------------------------------------------------------------
   20. URL List
   -------------------------------------------------------------------------- */
.sep-url-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.sep-url-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    background: var(--sep-bg);
    border: 1px solid var(--sep-gray-100);
    border-radius: var(--sep-radius-xs);
    transition: all var(--sep-transition);
    font-size: 13px;
}

.sep-url-item:hover {
    background: var(--sep-primary-light);
    border-color: var(--sep-primary-subtle);
}

.sep-url-item.selected {
    background: var(--sep-primary-light);
    border-color: var(--sep-primary-subtle);
}

.sep-url-checkbox {
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    accent-color: var(--sep-primary);
    cursor: pointer;
}

.sep-url-info {
    flex: 1;
    min-width: 0;
}

.sep-url-link {
    color: var(--sep-text);
    text-decoration: none;
    word-break: break-all;
    display: block;
    line-height: 1.4;
}

.sep-url-link:hover {
    color: var(--sep-primary);
}

.sep-url-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 3px;
}

.sep-url-tag {
    display: inline-block;
    padding: 1px 8px;
    background: var(--sep-gray-100);
    border-radius: 999px;
    font-size: 11px;
    color: var(--sep-text-secondary);
    font-weight: 500;
}

.sep-url-tag.cat {
    background: var(--sep-primary-light);
    color: var(--sep-primary);
}

.sep-url-copy-single {
    flex-shrink: 0;
    padding: 5px 8px;
    border: none;
    background: transparent;
    color: var(--sep-gray-400);
    cursor: pointer;
    border-radius: var(--sep-radius-xs);
    transition: all var(--sep-transition);
}

.sep-url-copy-single:hover {
    background: var(--sep-gray-100);
    color: var(--sep-primary);
}

/* --------------------------------------------------------------------------
   21. Load More
   -------------------------------------------------------------------------- */
.sep-load-more-wrapper {
    text-align: center;
    padding: 16px 0;
}

.sep-load-more-btn {
    padding: 10px 32px;
    border: 1px solid var(--sep-border);
    background: var(--sep-bg);
    border-radius: 999px;
    font-size: 14px;
    font-weight: 500;
    color: var(--sep-text-secondary);
    cursor: pointer;
    transition: all var(--sep-transition);
}

.sep-load-more-btn:hover {
    background: var(--sep-primary-light);
    border-color: var(--sep-primary-subtle);
    color: var(--sep-primary);
}

/* --------------------------------------------------------------------------
   22. Treemap Visualization
   -------------------------------------------------------------------------- */
.sep-treemap {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    padding: 4px;
    background: var(--sep-bg-secondary);
    border: 1px solid var(--sep-border);
    border-radius: var(--sep-radius);
    overflow: hidden;
}

.sep-treemap-cell {
    min-width: 80px;
    min-height: 56px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    padding: 8px 12px;
    border-radius: var(--sep-radius-sm);
    color: #fff;
    font-weight: 600;
    font-size: 13px;
    cursor: default;
    transition: all var(--sep-transition);
    position: relative;
    overflow: hidden;
}

.sep-treemap-cell:hover {
    filter: brightness(1.1);
    transform: scale(1.02);
    z-index: 2;
    box-shadow: var(--sep-shadow-md);
}

.sep-treemap-cell span {
    font-size: 11px;
    font-weight: 400;
    opacity: .85;
}

/* Hue variations for treemap cells */
.sep-treemap-cell:nth-child(8n+1) { background: #6366f1; }
.sep-treemap-cell:nth-child(8n+2) { background: #8b5cf6; }
.sep-treemap-cell:nth-child(8n+3) { background: #06b6d4; }
.sep-treemap-cell:nth-child(8n+4) { background: #10b981; }
.sep-treemap-cell:nth-child(8n+5) { background: #f59e0b; }
.sep-treemap-cell:nth-child(8n+6) { background: #ef4444; }
.sep-treemap-cell:nth-child(8n+7) { background: #ec4899; }
.sep-treemap-cell:nth-child(8n+8) { background: #14b8a6; }

/* --------------------------------------------------------------------------
   23. Tree Hierarchy Display
   -------------------------------------------------------------------------- */
.sep-tree-hierarchy {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 8px 0;
}

.sep-tree-cat {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    background: var(--sep-bg);
    border: 1px solid var(--sep-border);
    border-radius: var(--sep-radius-sm);
    font-size: 14px;
    font-weight: 600;
    color: var(--sep-text);
    cursor: pointer;
    transition: all var(--sep-transition);
}

.sep-tree-cat:hover {
    background: var(--sep-primary-light);
    border-color: var(--sep-primary-subtle);
}

.sep-tree-cat svg {
    flex-shrink: 0;
    color: var(--sep-primary);
    transition: transform var(--sep-transition);
}

.sep-tree-cat.expanded svg {
    transform: rotate(90deg);
}

.sep-tree-sub {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 16px 7px 44px;
    font-size: 13px;
    color: var(--sep-text-secondary);
    border-left: 2px solid var(--sep-border);
    margin-left: 20px;
    transition: all var(--sep-transition);
}

.sep-tree-sub:hover {
    color: var(--sep-primary);
    border-left-color: var(--sep-primary);
    background: var(--sep-primary-light);
    border-radius: 0 var(--sep-radius-xs) var(--sep-radius-xs) 0;
}

.sep-tree-sub .sep-category-count {
    margin-left: auto;
}

/* --------------------------------------------------------------------------
   24. Freshness Stats Grid
   -------------------------------------------------------------------------- */
.sep-freshness-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.sep-freshness-card {
    background: var(--sep-bg);
    border: 1px solid var(--sep-border);
    border-radius: var(--sep-radius);
    padding: 20px;
    text-align: center;
    box-shadow: var(--sep-shadow);
    transition: all var(--sep-transition);
}

.sep-freshness-card:hover {
    box-shadow: var(--sep-shadow-md);
    transform: translateY(-2px);
}

.sep-freshness-card .sep-stat-number {
    font-size: 28px;
    font-weight: 800;
    line-height: 1.1;
    color: var(--sep-primary);
}

.sep-freshness-card .sep-stat-label {
    font-size: 12px;
    color: var(--sep-text-secondary);
    margin-top: 6px;
    font-weight: 500;
}

.sep-freshness-card.success .sep-stat-number { color: var(--sep-success); }
.sep-freshness-card.warning .sep-stat-number { color: var(--sep-warning); }
.sep-freshness-card.danger  .sep-stat-number { color: var(--sep-danger); }

/* --------------------------------------------------------------------------
   25. Monthly Bar Chart
   -------------------------------------------------------------------------- */
.sep-monthly-chart {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 16px;
    background: var(--sep-bg);
    border: 1px solid var(--sep-border);
    border-radius: var(--sep-radius);
    box-shadow: var(--sep-shadow);
}

.sep-bar-row {
    display: flex;
    align-items: center;
    gap: 12px;
    min-height: 28px;
}

.sep-bar-label {
    flex-shrink: 0;
    width: 90px;
    font-size: 12px;
    font-weight: 500;
    color: var(--sep-text-secondary);
    text-align: right;
    white-space: nowrap;
}

.sep-bar-track {
    flex: 1;
    height: 22px;
    background: var(--sep-gray-100);
    border-radius: var(--sep-radius-xs);
    overflow: hidden;
    position: relative;
}

.sep-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--sep-primary), #818cf8);
    border-radius: var(--sep-radius-xs);
    transition: width .5s ease;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: 8px;
    min-width: 0;
}

.sep-bar-fill span {
    font-size: 11px;
    font-weight: 600;
    color: #fff;
    white-space: nowrap;
}

.sep-bar-value {
    flex-shrink: 0;
    width: 48px;
    font-size: 12px;
    font-weight: 700;
    color: var(--sep-text);
    text-align: left;
}

/* --------------------------------------------------------------------------
   26. URL Patterns List
   -------------------------------------------------------------------------- */
.sep-patterns-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.sep-pattern-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    background: var(--sep-bg);
    border: 1px solid var(--sep-border);
    border-radius: var(--sep-radius-sm);
    font-size: 13px;
    transition: all var(--sep-transition);
}

.sep-pattern-item:hover {
    background: var(--sep-primary-light);
    border-color: var(--sep-primary-subtle);
}

.sep-pattern-text {
    flex-shrink: 0;
    width: 200px;
    font-weight: 600;
    color: var(--sep-text);
    font-family: 'SF Mono', SFMono-Regular, Consolas, 'Liberation Mono', Menlo, monospace;
    font-size: 12px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sep-pattern-bar {
    flex: 1;
    height: 18px;
    background: var(--sep-gray-100);
    border-radius: var(--sep-radius-xs);
    overflow: hidden;
}

.sep-pattern-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--sep-primary), var(--sep-primary-subtle));
    border-radius: var(--sep-radius-xs);
    transition: width .4s ease;
}

.sep-pattern-count {
    flex-shrink: 0;
    min-width: 40px;
    text-align: right;
    font-size: 13px;
    font-weight: 700;
    color: var(--sep-text);
}

/* --------------------------------------------------------------------------
   27. Near-Duplicates Section
   -------------------------------------------------------------------------- */
.sep-near-dupes {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sep-dupe-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 14px 18px;
    background: var(--sep-bg);
    border: 1px solid var(--sep-border);
    border-left: 3px solid var(--sep-warning);
    border-radius: var(--sep-radius-sm);
    font-size: 13px;
    transition: all var(--sep-transition);
}

.sep-dupe-item:hover {
    background: var(--sep-warning-light);
    border-color: var(--sep-warning);
}

.sep-dupe-item a {
    color: var(--sep-primary);
    text-decoration: none;
    word-break: break-all;
    line-height: 1.4;
}

.sep-dupe-item a:hover {
    text-decoration: underline;
}

.sep-dupe-score {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    background: var(--sep-warning-light);
    color: var(--sep-warning);
    border-radius: 999px;
    font-size: 11px;
    font-weight: 700;
    align-self: flex-start;
}

/* --------------------------------------------------------------------------
   28. Toast Notification
   -------------------------------------------------------------------------- */
.sep-toast {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--sep-gray-900);
    color: #fff;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 500;
    box-shadow: var(--sep-shadow-lg);
    opacity: 0;
    transition: all .3s ease;
    z-index: 10000;
    pointer-events: none;
}

.sep-toast.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.sep-app.dark .sep-toast {
    background: #f8fafc;
    color: #0f172a;
}

/* --------------------------------------------------------------------------
   29. Empty State
   -------------------------------------------------------------------------- */
.sep-empty {
    text-align: center;
    padding: 48px 24px;
    color: var(--sep-gray-400);
}

.sep-empty svg {
    margin-bottom: 12px;
    opacity: .6;
}

.sep-empty p {
    margin: 0;
    font-size: 14px;
}

/* --------------------------------------------------------------------------
   30. Utility: hidden helper
   -------------------------------------------------------------------------- */
.sep-hidden {
    display: none !important;
}

/* --------------------------------------------------------------------------
   31. Responsive — Tablets
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    .sep-input-row {
        flex-direction: column;
    }

    .sep-toolbar {
        flex-direction: column;
        align-items: stretch;
    }

    .sep-toolbar-left,
    .sep-toolbar-right {
        flex-wrap: wrap;
    }

    .sep-filter-input {
        width: 100%;
    }

    .sep-stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .sep-freshness-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .sep-mode-toggle {
        flex-direction: column;
    }

    .sep-url-item {
        flex-wrap: wrap;
    }

    .sep-tabs {
        gap: 4px;
    }

    .sep-tab {
        padding: 7px 12px;
        font-size: 12px;
    }

    .sep-pattern-text {
        width: 120px;
        font-size: 11px;
    }

    .sep-bar-label {
        width: 64px;
        font-size: 11px;
    }

    .sep-treemap-cell {
        min-width: 60px;
        min-height: 44px;
        font-size: 11px;
    }

    .sep-tree-sub {
        padding-left: 32px;
        margin-left: 12px;
    }

    .sep-export-menu {
        right: auto;
        left: 0;
    }
}

/* --------------------------------------------------------------------------
   32. Responsive — Mobile
   -------------------------------------------------------------------------- */
@media (max-width: 480px) {
    .sep-stats-grid {
        grid-template-columns: 1fr;
    }

    .sep-freshness-grid {
        grid-template-columns: 1fr;
    }

    .sep-header {
        flex-direction: column;
        text-align: center;
    }

    .sep-dark-toggle {
        position: relative;
        top: auto;
        right: auto;
        margin: 8px auto 0;
    }

    .sep-tabs {
        flex-direction: column;
    }

    .sep-tab {
        justify-content: center;
    }

    .sep-pattern-text {
        width: 100%;
    }

    .sep-pattern-item {
        flex-wrap: wrap;
    }

    .sep-bar-label {
        width: 52px;
    }

    .sep-treemap {
        gap: 3px;
        padding: 3px;
    }

    .sep-treemap-cell {
        min-width: 50px;
        min-height: 40px;
        font-size: 10px;
        padding: 6px 8px;
    }

    .sep-dupe-item {
        padding: 10px 14px;
    }

    .sep-export-menu {
        min-width: 160px;
    }
}

/* --------------------------------------------------------------------------
   33. Print Styles
   -------------------------------------------------------------------------- */
@media print {
    .sep-dark-toggle,
    .sep-toolbar,
    .sep-mode-toggle,
    .sep-extract-btn,
    .sep-tabs,
    .sep-export-dropdown,
    .sep-load-more-wrapper {
        display: none !important;
    }

    .sep-app {
        color: #000;
        background: #fff;
    }

    .sep-stat-card,
    .sep-freshness-card,
    .sep-monthly-chart,
    .sep-pattern-item,
    .sep-url-item {
        box-shadow: none;
        border: 1px solid #ccc;
    }
}