/* ========================================
   Global Styles & Reset
   ======================================== */

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

:root {
    /* Colors */
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #8b5cf6;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;

    /* Neutrals - Dark Theme */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: #1e293b;
    --bg-hover: #2d3748;

    /* Text - Dark Theme */
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;

    /* Borders */
    --border-color: #334155;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6), 0 10px 10px -5px rgba(0, 0, 0, 0.4);

    /* Neon Glow Effects */
    --neon-glow: 0 0 5px var(--primary-color),
                 0 0 10px var(--primary-color),
                 0 0 20px var(--primary-color),
                 0 0 40px var(--primary-color);

    --neon-glow-strong: 0 0 10px var(--primary-color),
                        0 0 20px var(--primary-color),
                        0 0 40px var(--primary-color),
                        0 0 80px var(--primary-color);

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
}

/* Light Theme */
body.light-theme {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;
    --bg-hover: #f1f5f9;

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;

    --border-color: #e2e8f0;

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

body.light-theme {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ========================================
   Container & Layout
   ======================================== */

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-md);
}

/* ========================================
   Header
   ======================================== */

.header {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.header-title {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.header-title i {
    -webkit-text-fill-color: var(--primary-color);
}

.header-actions {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
    flex-wrap: wrap;
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-box i {
    position: absolute;
    left: var(--spacing-sm);
    color: var(--text-muted);
    pointer-events: none;
}

.search-box input {
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-radius: var(--border-radius);
    font-size: 0.95rem;
    width: 250px;
    transition: all var(--transition-normal);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    width: 300px;
}

.header-stats {
    display: flex;
    gap: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.stat-item i {
    color: var(--primary-color);
    font-size: 1.1rem;
}

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

.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-lg);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.breadcrumb i {
    color: var(--primary-color);
}

/* ========================================
   View Controls
   ======================================== */

.view-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.view-mode-buttons {
    display: flex;
    gap: var(--spacing-xs);
    background: var(--bg-card);
    padding: var(--spacing-xs);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.mode-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: transparent;
    border: none;
    border-radius: var(--border-radius-sm);
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.9rem;
}

.mode-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.mode-btn.active {
    background: var(--primary-color);
    color: white;
}

.mode-btn i {
    font-size: 1rem;
}

.view-buttons {
    display: flex;
    gap: var(--spacing-xs);
    background: var(--bg-card);
    padding: var(--spacing-xs);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.view-btn {
    padding: 0.5rem 1rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
    font-size: 1rem;
}

.view-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.view-btn.active {
    background: var(--primary-color);
    color: white;
}

.sort-controls label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--bg-card);
    padding: 0.5rem var(--spacing-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.sort-controls select {
    border: none;
    background: transparent;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.95rem;
    outline: none;
}

.sort-controls i {
    color: var(--primary-color);
}

/* ========================================
   Directories Container
   ======================================== */

.directories-container {
    min-height: 400px;
}

.directories-grid {
    display: grid;
    gap: var(--spacing-lg);
    animation: fadeIn 0.5s ease-in-out;
}

.view-grid {
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
}

.view-list {
    grid-template-columns: 1fr;
}

/* ========================================
   Directory Card
   ======================================== */

.directory-card {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: all var(--transition-slow);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    position: relative;
}

.directory-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--border-radius-lg);
    padding: 2px;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: all var(--transition-slow);
}

.directory-card:hover {
    transform: translateY(-8px) translateX(2px) rotate(0.5deg);
    box-shadow: var(--neon-glow), var(--shadow-xl);
    border-color: var(--primary-color);
}

.directory-card:hover::before {
    opacity: 1;
}

.directory-card:hover .card-title {
    text-shadow: var(--neon-glow);
    color: var(--primary-light);
}

.card-preview {
    position: relative;
    height: 200px;
    background: var(--bg-tertiary);
    overflow: hidden;
    flex-shrink: 0;
}

/* Card without preview should have padding at top */
.directory-card:not(:has(.card-preview)) .card-content {
    padding-top: var(--spacing-lg);
}

.preview-frame {
    width: 100%;
    height: 100%;
    border: none;
    transform: scale(0.5);
    transform-origin: top left;
    width: 200%;
    height: 200%;
    pointer-events: none;
}

.preview-overlay {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.card-preview:hover .preview-overlay {
    opacity: 1;
}

.btn-preview {
    background: var(--primary-color);
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: all var(--transition-normal);
    text-decoration: none;
}

.btn-preview:hover {
    background: var(--primary-dark);
    transform: scale(1.1);
}

.preview-empty {
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
}

.preview-empty i {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    opacity: 0.5;
}

.card-content {
    padding: var(--spacing-md);
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-title i {
    color: var(--primary-color);
    flex-shrink: 0;
}

.card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    font-size: 0.85rem;
    color: var(--text-muted);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.status-online {
    color: var(--success-color);
}

.status-offline {
    color: var(--warning-color);
}

/* ========================================
   Buttons
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

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

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

.btn-secondary:hover {
    background: var(--bg-hover);
}

.btn-danger {
    background: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background: #dc2626;
}

.btn-admin {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.btn-admin:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-block {
    width: 100%;
    justify-content: center;
    margin-top: auto;
}

/* ========================================
   Empty State
   ======================================== */

.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    border: 2px dashed var(--border-color);
}

.empty-state i {
    font-size: 4rem;
    color: var(--text-muted);
    opacity: 0.5;
    margin-bottom: var(--spacing-md);
}

.empty-state h2 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

.empty-state p {
    color: var(--text-muted);
    margin-bottom: var(--spacing-lg);
}

/* ========================================
   Footer
   ======================================== */

.footer {
    text-align: center;
    padding: var(--spacing-lg);
    margin-top: var(--spacing-xl);
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
}

.footer i {
    color: var(--primary-color);
}

/* ========================================
   Notification
   ======================================== */

.notification {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    background: var(--bg-card);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--primary-color);
    display: none;
    align-items: center;
    gap: var(--spacing-sm);
    z-index: 1000;
    animation: slideInRight 0.3s ease-out;
}

.notification.show {
    display: flex;
}

.notification button {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.notification button:hover {
    background: var(--primary-dark);
}

/* ========================================
   Admin Page Styles
   ======================================== */

.admin-page {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
}

/* Login */

.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.login-box {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-color);
    max-width: 400px;
    width: 100%;
    animation: fadeIn 0.5s ease-in-out;
}

.login-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.login-header i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.login-header h1 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-xs);
}

.login-header p {
    color: var(--text-muted);
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-group label {
    color: var(--text-secondary);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.form-control {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: all var(--transition-normal);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group small {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.login-footer {
    text-align: center;
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.login-footer a {
    color: var(--primary-color);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: color var(--transition-fast);
}

.login-footer a:hover {
    color: var(--primary-light);
}

/* Admin Grid */

.admin-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.admin-panel {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    max-height: calc(100vh - 300px);
}

.panel-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.panel-header h2 {
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.panel-header i {
    color: var(--primary-color);
}

.panel-content {
    padding: var(--spacing-md);
    overflow-y: auto;
    flex: 1;
}

.current-folder {
    color: var(--text-muted);
    font-size: 0.9rem;
    font-style: italic;
}

/* Folders List */

.folders-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
}

.folder-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
    margin-bottom: 0.25rem;
    overflow: hidden;
}

.folder-item:hover .folder-main {
    background: var(--bg-hover);
}

.folder-item.active .folder-main {
    background: var(--primary-color);
    color: white;
}

.folder-item.active .folder-main .folder-info i,
.folder-item.active .folder-main .folder-name,
.folder-item.active .folder-main .btn-icon,
.folder-item.active .folder-main .toggle-children {
    color: white !important;
}

.folder-main {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.folder-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex: 1;
    min-width: 0;
}

.folder-info i {
    font-size: 1.2rem;
}

.folder-details {
    flex: 1;
}

.folder-name {
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.folder-meta {
    font-size: 0.8rem;
    opacity: 0.7;
}

.folder-actions {
    display: flex;
    gap: var(--spacing-xs);
}

.btn-icon {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
    font-size: 1rem;
}

.btn-icon:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.btn-icon.danger:hover {
    color: var(--danger-color);
}

/* Upload Zone */

.upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    transition: all var(--transition-normal);
    cursor: pointer;
    margin-bottom: var(--spacing-lg);
    background: var(--bg-secondary);
}

.upload-zone:hover {
    border-color: var(--primary-color);
    background: var(--bg-tertiary);
}

.upload-zone.dragover {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
}

.upload-zone.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

.upload-content i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.upload-content h3 {
    margin-bottom: var(--spacing-xs);
}

.upload-content p {
    color: var(--text-muted);
    margin-bottom: var(--spacing-xs);
}

.upload-hint {
    font-size: 0.85rem;
    opacity: 0.7;
}

.upload-progress {
    padding: var(--spacing-md);
}

.progress-bar {
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: var(--spacing-sm);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    width: 0%;
    transition: width var(--transition-normal);
}

/* Files List */

.files-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.file-item {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all var(--transition-fast);
}

.file-item:hover {
    background: var(--bg-hover);
}

.file-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex: 1;
}

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

.file-icon.html { color: #e34c26; }
.file-icon.css { color: #264de4; }
.file-icon.js { color: #f0db4f; }
.file-icon.image { color: #10b981; }
.file-icon.pdf { color: #ef4444; }
.file-icon.default { color: var(--text-muted); }

.file-details {
    flex: 1;
}

.file-name {
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.file-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Modal */

.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: var(--spacing-md);
}

.modal.show {
    display: flex;
    animation: fadeIn 0.2s ease-in-out;
}

.modal-content {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-xl);
    max-width: 500px;
    width: 100%;
    animation: slideInDown 0.3s ease-out;
}

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

.modal-header h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.modal-close {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1.5rem;
    padding: 0.5rem;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.modal-body {
    padding: var(--spacing-lg);
}

.modal-footer {
    padding: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
}

/* Alerts */

.alert {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--danger-color);
    color: #fca5a5;
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid var(--success-color);
    color: #6ee7b7;
}

.alert-info {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid var(--info-color);
    color: #93c5fd;
}

/* Folder Info Display */

.folder-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-primary);
}

.folder-info i {
    color: var(--primary-color);
    font-size: 1.25rem;
}

.folder-info strong {
    color: var(--primary-light);
}

/* Notification Container */

.notification-container {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: 3000;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    max-width: 400px;
}

.toast {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    animation: slideInRight 0.3s ease-out;
}

.toast.success { border-left: 4px solid var(--success-color); }
.toast.error { border-left: 4px solid var(--danger-color); }
.toast.info { border-left: 4px solid var(--info-color); }

.toast-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.toast.success .toast-icon { color: var(--success-color); }
.toast.error .toast-icon { color: var(--danger-color); }
.toast.info .toast-icon { color: var(--info-color); }

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.toast-message {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Loading */

.loading {
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--text-muted);
}

.loading i {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

/* ========================================
   Animations
   ======================================== */

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideInDown {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 1024px) {
    .admin-grid {
        grid-template-columns: 1fr;
    }

    .admin-panel {
        max-height: 500px;
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        align-items: flex-start;
    }

    .header-actions {
        width: 100%;
    }

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

    .search-box input:focus {
        width: 100%;
    }

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

    .directories-grid.view-grid {
        grid-template-columns: 1fr;
    }

    .notification-container {
        left: var(--spacing-md);
        right: var(--spacing-md);
        max-width: none;
    }

    .btn span {
        display: none;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-sm: 0.75rem;
        --spacing-md: 1rem;
        --spacing-lg: 1.5rem;
    }

    .header-title {
        font-size: 1.5rem;
    }

    .container {
        padding: var(--spacing-sm);
    }

    .card-preview {
        height: 150px;
    }
}

/* ========================================
   Print Styles
   ======================================== */

@media print {
    .header-actions,
    .view-controls,
    .footer,
    .notification,
    .btn {
        display: none !important;
    }
}

/* ========================================
   Dark Mode (default)
   ======================================== */

@media (prefers-color-scheme: light) {
    /* Optional: Add light mode support */
}

/* ========================================
   Utility Classes
   ======================================== */

.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

/* ========================================
   Expandable Subdirectories
   ======================================== */

.directory-card {
    position: relative;
}

.directory-card.has-subdirs {
    border-left: 3px solid var(--primary-color);
}

.directory-card.expanded {
    background: rgba(99, 102, 241, 0.05);
}

.expand-btn {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    width: 32px;
    height: 32px;
    background: var(--primary-color);
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-normal);
    z-index: 10;
}

.expand-btn:hover {
    background: var(--primary-dark);
    transform: scale(1.1);
}

.expand-btn i {
    transition: var(--transition-normal);
}

.course-count {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.2rem 0.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 12px;
    margin-left: auto;
}

.course-count i {
    font-size: 0.7rem;
    color: white !important;
}

.subdirs-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 20px;
    padding: 0 6px;
    background: var(--primary-color);
    color: white;
    border-radius: 10px;
    font-size: 0.75rem;
    font-weight: 700;
    margin-left: 0.5rem;
}

.subdirs-container {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.subdirs-grid {
    display: grid;
    gap: var(--spacing-md);
    grid-template-columns: 1fr;
}

.subdirs-container .directory-card {
    margin-left: calc(var(--depth, 0) * var(--spacing-lg));
    opacity: 0;
    animation: slideDown 0.3s ease forwards;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Admin folder hierarchy */
.folder-item {
    position: relative;
}

.folder-item.has-children {
    border-left: 3px solid var(--primary-color);
}

.folder-item .folder-children {
    margin-left: 1.5rem;
    margin-top: 0.5rem;
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    border-left: 2px solid rgba(99, 102, 241, 0.2);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

body.light-theme .folder-item .folder-children {
    border-left-color: rgba(99, 102, 241, 0.3);
}

.folder-item .folder-children .folder-item {
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--border-radius-sm);
    border-left: 3px solid rgba(99, 102, 241, 0.3);
}

.folder-item .folder-children .folder-item:hover .folder-main {
    background: rgba(255, 255, 255, 0.08);
}

.folder-item .folder-children .folder-item.active .folder-main {
    background: var(--primary-color);
}

/* Light theme adjustments for folder hierarchy */
body.light-theme .folder-item .folder-children .folder-item {
    background: rgba(0, 0, 0, 0.02);
}

body.light-theme .folder-item .folder-children .folder-item:hover .folder-main {
    background: rgba(0, 0, 0, 0.05);
}

.toggle-children {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.25rem;
    transition: transform var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.toggle-children:hover {
    color: var(--primary-color);
}

.toggle-children.expanded {
    transform: rotate(90deg);
}

.folder-item .folder-main {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
}

.folder-item .folder-info {
    flex: 1;
    min-width: 0;
}

/* Visibility toggle button */
.visibility-toggle {
    padding: 0.5rem;
    border: none;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.25rem;
    margin-right: 0.5rem;
    transition: var(--transition-fast);
}

.folder-item .toggle-children:hover {
    color: var(--primary-color);
}

.folder-item .toggle-children i {
    transition: var(--transition-fast);
}

.folder-item.expanded .toggle-children i {
    transform: rotate(90deg);
}

/* Visibility toggle */
.visibility-toggle {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
}

.visibility-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
}

.visibility-toggle.visible {
    color: var(--success-color);
}

.visibility-toggle.hidden {
    color: var(--danger-color);
}

.folder-item.hidden-folder {
    opacity: 0.5;
    background: rgba(239, 68, 68, 0.05);
}

.folder-item.hidden-folder .folder-name::after {
    content: " (caché)";
    font-size: 0.8rem;
    color: var(--danger-color);
    font-style: italic;
}

/* ========================================
   Theme Toggle Button
   ======================================== */

.theme-toggle {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    box-shadow: var(--shadow-xl);
    z-index: 999;
    transition: all var(--transition-normal);
}

.theme-toggle:hover {
    transform: scale(1.1) rotate(15deg);
    box-shadow: var(--neon-glow-strong), var(--shadow-xl);
}

.theme-toggle i {
    transition: all var(--transition-normal);
}

.theme-toggle:active {
    transform: scale(0.95);
}

/* Pulse animation for theme toggle */
@keyframes pulse-neon {
    0%, 100% {
        box-shadow: var(--shadow-xl);
    }
    50% {
        box-shadow: var(--neon-glow), var(--shadow-xl);
    }
}

.theme-toggle {
    animation: pulse-neon 3s ease-in-out infinite;
}

.theme-toggle:hover {
    animation: none;
}