/* ==========================================================================
   WoodClass Admin Panel - Main Stylesheet
   Glassmorphic Design with Orange Accents
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Variables & Theme
   -------------------------------------------------------------------------- */
:root {
    /* Colors */
    --primary: #f59e0b;
    --primary-dark: #d97706;
    --primary-light: #fbbf24;
    --secondary: #1e3a5f;
    --secondary-dark: #0f2744;
    --secondary-light: #2d4a6f;
    
    /* Status Colors */
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.1);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.1);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.1);
    --info: #3b82f6;
    --info-bg: rgba(59, 130, 246, 0.1);
    
    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-bg-solid: rgba(255, 255, 255, 0.95);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    --backdrop-blur: blur(10px);
    
    /* Text */
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --text-white: #ffffff;
    
    /* Background */
    --bg-gradient: linear-gradient(135deg, #1e3a5f 0%, #0f2744 50%, #1a365d 100%);
    --bg-light: #f3f4f6;
    --bg-card: #ffffff;
    
    /* Spacing */
    --sidebar-width: 260px;
    --header-height: 64px;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Z-Index */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-tooltip: 600;
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --glass-bg-solid: rgba(30, 41, 59, 0.95);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-light: #64748b;
    --bg-light: #0f172a;
    --bg-card: #1e293b;
    --glass-border: rgba(255, 255, 255, 0.1);
}

/* --------------------------------------------------------------------------
   Reset & Base
   -------------------------------------------------------------------------- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 0.9375rem;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-gradient);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-dark);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    font-family: inherit;
    cursor: pointer;
}

input, select, textarea {
    font-family: inherit;
    font-size: inherit;
}

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--text-primary);
}

h1 { font-size: 1.875rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; }

.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-lg { font-size: 1.125rem; }

.text-muted { color: var(--text-secondary); }
.text-light { color: var(--text-light); }
.text-primary { color: var(--primary) !important; }
.text-success { color: var(--success) !important; }
.text-danger { color: var(--danger) !important; }
.text-warning { color: var(--warning) !important; }

/* --------------------------------------------------------------------------
   Layout - Main Structure
   -------------------------------------------------------------------------- */
.app-wrapper {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--glass-bg-solid);
    backdrop-filter: var(--backdrop-blur);
    border-right: 1px solid var(--glass-border);
    display: flex;
    flex-direction: column;
    z-index: var(--z-fixed);
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
}

.sidebar.open {
    transform: translateX(0);
}

.main-content {
    flex: 1;
    margin-left: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: margin-left var(--transition-normal);
}

/* Desktop Layout */
@media (min-width: 1024px) {
    .sidebar {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: var(--sidebar-width);
    }
}

/* --------------------------------------------------------------------------
   Sidebar
   -------------------------------------------------------------------------- */
.sidebar-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.sidebar-logo svg,
.sidebar-logo img {
    width: 32px;
    height: 32px;
}

.sidebar-logo span {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-close {
    display: flex;
    margin-left: auto;
    padding: var(--spacing-sm);
    background: none;
    border: none;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

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

@media (min-width: 1024px) {
    .sidebar-close {
        display: none;
    }
}

/* Sidebar Navigation */
.sidebar-nav {
    flex: 1;
    padding: var(--spacing-md);
    overflow-y: auto;
}

.nav-section {
    margin-bottom: var(--spacing-lg);
}

.nav-section-title {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-light);
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-xs);
}

.nav-menu {
    list-style: none;
}

.nav-item {
    margin-bottom: 2px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-link:hover {
    background: var(--glass-bg);
    color: var(--text-primary);
}

.nav-link.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--text-white);
}

.nav-link svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.nav-badge {
    margin-left: auto;
    padding: 2px 8px;
    font-size: 0.6875rem;
    font-weight: 600;
    background: var(--primary);
    color: var(--text-white);
    border-radius: 10px;
}

/* Sidebar User */
.sidebar-user {
    padding: var(--spacing-md);
    border-top: 1px solid var(--glass-border);
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
}

.user-info:hover {
    background: var(--glass-bg);
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    font-weight: 600;
    font-size: 0.875rem;
    flex-shrink: 0;
}

.user-details {
    flex: 1;
    min-width: 0;
}

.user-name {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-role {
    font-size: 0.75rem;
    color: var(--text-light);
    text-transform: capitalize;
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.header {
    height: var(--header-height);
    background: var(--glass-bg-solid);
    backdrop-filter: var(--backdrop-blur);
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-lg);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.menu-toggle {
    display: flex;
    padding: var(--spacing-sm);
    background: none;
    border: none;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.menu-toggle:hover {
    background: var(--glass-bg);
    color: var(--text-primary);
}

@media (min-width: 1024px) {
    .menu-toggle {
        display: none;
    }
}

.page-title {
    font-size: 1.125rem;
    font-weight: 600;
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-left: auto;
}

/* Search Box */
.search-box {
    position: relative;
    display: none;
}

@media (min-width: 768px) {
    .search-box {
        display: block;
    }
}

.search-box input {
    width: 240px;
    padding: var(--spacing-sm) var(--spacing-md);
    padding-left: 40px;
    background: var(--bg-light);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.1);
}

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

.search-box svg {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    color: var(--text-light);
}

/* Header Actions */
.header-action {
    position: relative;
    display: flex;
    padding: var(--spacing-sm);
    background: none;
    border: none;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.header-action:hover {
    background: var(--glass-bg);
    color: var(--text-primary);
}

.header-action svg {
    width: 20px;
    height: 20px;
}

.notification-dot {
    position: absolute;
    top: 6px;
    right: 6px;
    width: 8px;
    height: 8px;
    background: var(--danger);
    border-radius: 50%;
}

/* --------------------------------------------------------------------------
   Main Content Area
   -------------------------------------------------------------------------- */
.content {
    flex: 1;
    padding: var(--spacing-lg);
}

@media (min-width: 768px) {
    .content {
        padding: var(--spacing-xl);
    }
}

/* --------------------------------------------------------------------------
   Cards
   -------------------------------------------------------------------------- */
.card {
    background: var(--glass-bg-solid);
    backdrop-filter: var(--backdrop-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--glass-shadow);
    overflow: hidden;
}

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

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.card-title svg {
    width: 20px;
    height: 20px;
    color: var(--primary);
}

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

.card-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--glass-border);
    background: rgba(0, 0, 0, 0.02);
}

/* --------------------------------------------------------------------------
   Stat Cards
   -------------------------------------------------------------------------- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

@media (min-width: 576px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 992px) {
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.stat-card {
    background: var(--glass-bg-solid);
    backdrop-filter: var(--backdrop-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon svg {
    width: 24px;
    height: 24px;
}

.stat-icon.primary {
    background: rgba(245, 158, 11, 0.1);
    color: var(--primary);
}

.stat-icon.success {
    background: var(--success-bg);
    color: var(--success);
}

.stat-icon.info {
    background: var(--info-bg);
    color: var(--info);
}

.stat-icon.warning {
    background: var(--warning-bg);
    color: var(--warning);
}

.stat-content {
    flex: 1;
    min-width: 0;
}

.stat-label {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.stat-change {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.75rem;
    font-weight: 500;
    margin-top: var(--spacing-xs);
}

.stat-change.up {
    color: var(--success);
}

.stat-change.down {
    color: var(--danger);
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
    font-weight: 500;
    line-height: 1.5;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn svg {
    width: 18px;
    height: 18px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--text-white);
    border-color: var(--primary);
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}

.btn-secondary {
    background: var(--secondary);
    color: var(--text-white);
    border-color: var(--secondary);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--secondary-light);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border-color: var(--glass-border);
}

.btn-outline:hover:not(:disabled) {
    background: var(--glass-bg);
    border-color: var(--primary);
    color: var(--primary);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
    background: var(--glass-bg);
    color: var(--text-primary);
}

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

.btn-danger:hover:not(:disabled) {
    background: #dc2626;
}

.btn-success {
    background: var(--success);
    color: var(--text-white);
    border-color: var(--success);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.8125rem;
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1rem;
}

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

.btn-group {
    display: inline-flex;
}

.btn-group .btn {
    border-radius: 0;
}

.btn-group .btn:first-child {
    border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.btn-group .btn:last-child {
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.btn-group .btn:not(:last-child) {
    border-right: none;
}

/* --------------------------------------------------------------------------
   Forms
   -------------------------------------------------------------------------- */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.form-label.required::after {
    content: '*';
    color: var(--danger);
    margin-left: 4px;
}

.form-control {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.9375rem;
    color: var(--text-primary);
    background: var(--bg-light);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.1);
}

.form-control::placeholder {
    color: var(--text-light);
}

.form-control:disabled {
    background: var(--bg-light);
    opacity: 0.7;
    cursor: not-allowed;
}

.form-control.is-invalid {
    border-color: var(--danger);
}

.form-control.is-invalid:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

textarea.form-control {
    min-height: 100px;
    resize: vertical;
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 40px;
}

.form-text {
    font-size: 0.8125rem;
    color: var(--text-light);
    margin-top: var(--spacing-xs);
}

.invalid-feedback {
    font-size: 0.8125rem;
    color: var(--danger);
    margin-top: var(--spacing-xs);
}

/* Checkbox & Radio */
.form-check {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.form-check-input {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
    cursor: pointer;
}

.form-check-label {
    font-size: 0.9375rem;
    color: var(--text-primary);
    cursor: pointer;
}

/* Input Group */
.input-group {
    display: flex;
}

.input-group .form-control {
    border-radius: 0;
}

.input-group .form-control:first-child {
    border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.input-group .form-control:last-child {
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.input-group-text {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-light);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
}

.input-group-text:first-child {
    border-radius: var(--radius-md) 0 0 var(--radius-md);
    border-right: none;
}

.input-group-text:last-child {
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    border-left: none;
}

/* --------------------------------------------------------------------------
   Tables
   -------------------------------------------------------------------------- */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--glass-border);
}

.table th {
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    background: rgba(0, 0, 0, 0.02);
}

.table td {
    font-size: 0.9375rem;
    color: var(--text-primary);
}

.table tbody tr:hover {
    background: var(--glass-bg);
}

.table-striped tbody tr:nth-child(even) {
    background: rgba(0, 0, 0, 0.02);
}

/* --------------------------------------------------------------------------
   Breadcrumb
   -------------------------------------------------------------------------- */
.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-lg);
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
}

.breadcrumb-item a {
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.breadcrumb-item a:hover {
    color: var(--primary);
}

.breadcrumb-item.active {
    color: var(--text-primary);
    font-weight: 500;
}

.breadcrumb-item + .breadcrumb-item::before {
    content: '';
    display: block;
    width: 16px;
    height: 16px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%239ca3af' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m9 18 6-6-6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: center;
}

/* --------------------------------------------------------------------------
   File Browser
   -------------------------------------------------------------------------- */
.file-browser {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.file-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-md);
}

.file-toolbar-left {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.file-toolbar-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-left: auto;
}

.view-toggle {
    display: flex;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    padding: 2px;
}

.view-toggle button {
    padding: var(--spacing-sm);
    background: none;
    border: none;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.view-toggle button:hover {
    color: var(--text-primary);
}

.view-toggle button.active {
    background: var(--bg-card);
    color: var(--primary);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

/* File Grid */
.file-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: var(--spacing-md);
}

@media (min-width: 768px) {
    .file-grid {
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    }
}

.file-item {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

.file-item:hover {
    border-color: var(--primary);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.file-item.selected {
    border-color: var(--primary);
    background: rgba(245, 158, 11, 0.05);
}

.file-checkbox {
    position: absolute;
    top: var(--spacing-sm);
    left: var(--spacing-sm);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.file-item:hover .file-checkbox,
.file-item.selected .file-checkbox {
    opacity: 1;
}

.file-preview {
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--bg-light);
}

.file-preview img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.file-preview svg {
    width: 48px;
    height: 48px;
}

.file-preview.folder svg {
    color: var(--primary);
}

.file-preview.pdf svg {
    color: var(--danger);
}

.file-preview.image svg {
    color: var(--info);
}

.file-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 4px;
}

.file-meta {
    font-size: 0.75rem;
    color: var(--text-light);
    display: flex;
    justify-content: space-between;
}

/* File List View */
.file-list {
    display: flex;
    flex-direction: column;
}

.file-list-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--glass-border);
    cursor: pointer;
    transition: background var(--transition-fast);
}

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

.file-list-item.selected {
    background: rgba(245, 158, 11, 0.05);
}

.file-list-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.file-list-icon svg {
    width: 24px;
    height: 24px;
}

.file-list-icon.folder svg {
    color: var(--primary);
}

.file-list-icon.pdf svg {
    color: var(--danger);
}

.file-list-icon.image svg {
    color: var(--info);
}

.file-list-info {
    flex: 1;
    min-width: 0;
}

.file-list-name {
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-list-meta {
    font-size: 0.8125rem;
    color: var(--text-light);
}

.file-list-actions {
    display: flex;
    gap: var(--spacing-xs);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.file-list-item:hover .file-list-actions {
    opacity: 1;
}

/* --------------------------------------------------------------------------
   Upload Area
   -------------------------------------------------------------------------- */
.upload-area {
    border: 2px dashed var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--primary);
    background: rgba(245, 158, 11, 0.05);
}

.upload-area svg {
    width: 48px;
    height: 48px;
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
}

.upload-area.dragover svg {
    color: var(--primary);
}

.upload-title {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.upload-subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.upload-subtitle span {
    color: var(--primary);
    font-weight: 500;
}

/* Upload Progress */
.upload-progress {
    margin-top: var(--spacing-lg);
}

.upload-file {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-light);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
}

.upload-file-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border-radius: var(--radius-md);
}

.upload-file-info {
    flex: 1;
    min-width: 0;
}

.upload-file-name {
    font-weight: 500;
    font-size: 0.875rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.upload-file-size {
    font-size: 0.75rem;
    color: var(--text-light);
}

.progress {
    height: 4px;
    background: var(--glass-border);
    border-radius: 2px;
    overflow: hidden;
    margin-top: var(--spacing-xs);
}

.progress-bar {
    height: 100%;
    background: var(--primary);
    border-radius: 2px;
    transition: width var(--transition-fast);
}

.upload-file-status {
    font-size: 0.75rem;
    font-weight: 500;
}

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

.upload-file-status.error {
    color: var(--danger);
}

/* --------------------------------------------------------------------------
   Alerts
   -------------------------------------------------------------------------- */
.alert {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.alert svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    margin-top: 2px;
}

.alert-content {
    flex: 1;
}

.alert-title {
    font-weight: 600;
    margin-bottom: 4px;
}

.alert-message {
    font-size: 0.875rem;
}

.alert-success {
    background: var(--success-bg);
    color: var(--success);
}

.alert-danger {
    background: var(--danger-bg);
    color: var(--danger);
}

.alert-warning {
    background: var(--warning-bg);
    color: var(--warning);
}

.alert-info {
    background: var(--info-bg);
    color: var(--info);
}

/* --------------------------------------------------------------------------
   Badges
   -------------------------------------------------------------------------- */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 10px;
}

.badge-primary {
    background: rgba(245, 158, 11, 0.1);
    color: var(--primary);
}

.badge-success {
    background: var(--success-bg);
    color: var(--success);
}

.badge-danger {
    background: var(--danger-bg);
    color: var(--danger);
}

.badge-warning {
    background: var(--warning-bg);
    color: var(--warning);
}

.badge-info {
    background: var(--info-bg);
    color: var(--info);
}

.badge-secondary {
    background: rgba(107, 114, 128, 0.1);
    color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   Modal
   -------------------------------------------------------------------------- */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: var(--z-modal-backdrop);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-backdrop.show {
    opacity: 1;
    visibility: visible;
}

.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.95);
    width: calc(100% - 32px);
    max-width: 500px;
    max-height: calc(100vh - 64px);
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2);
    z-index: var(--z-modal);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
}

.modal.show {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

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

.modal-title {
    font-size: 1.125rem;
    font-weight: 600;
}

.modal-close {
    padding: var(--spacing-sm);
    background: none;
    border: none;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

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

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

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

.modal-lg {
    max-width: 800px;
}

.modal-xl {
    max-width: 1140px;
}

/* --------------------------------------------------------------------------
   Dropdown
   -------------------------------------------------------------------------- */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    min-width: 180px;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    z-index: var(--z-dropdown);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-fast);
    padding: var(--spacing-xs);
}

.dropdown-menu.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(4px);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
    color: var(--text-primary);
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    text-align: left;
    cursor: pointer;
    transition: background var(--transition-fast);
}

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

.dropdown-item svg {
    width: 16px;
    height: 16px;
    color: var(--text-secondary);
}

.dropdown-item.danger {
    color: var(--danger);
}

.dropdown-item.danger svg {
    color: var(--danger);
}

.dropdown-divider {
    height: 1px;
    background: var(--glass-border);
    margin: var(--spacing-xs) 0;
}

/* --------------------------------------------------------------------------
   Pagination
   -------------------------------------------------------------------------- */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-lg);
}

.page-link {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--text-secondary);
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.page-link:hover {
    background: var(--glass-bg);
    border-color: var(--primary);
    color: var(--primary);
}

.page-link.active {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--text-white);
}

.page-link.disabled {
    opacity: 0.5;
    pointer-events: none;
}

/* --------------------------------------------------------------------------
   Empty State
   -------------------------------------------------------------------------- */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-lg);
}

.empty-state svg {
    width: 64px;
    height: 64px;
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
}

.empty-state-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

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

/* --------------------------------------------------------------------------
   Activity Log
   -------------------------------------------------------------------------- */
.activity-list {
    display: flex;
    flex-direction: column;
}

.activity-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--glass-border);
}

.activity-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.activity-icon svg {
    width: 18px;
    height: 18px;
}

.activity-icon.upload {
    background: var(--success-bg);
    color: var(--success);
}

.activity-icon.download {
    background: var(--info-bg);
    color: var(--info);
}

.activity-icon.delete {
    background: var(--danger-bg);
    color: var(--danger);
}

.activity-icon.edit {
    background: var(--warning-bg);
    color: var(--warning);
}

.activity-icon.login {
    background: rgba(107, 114, 128, 0.1);
    color: var(--text-secondary);
}

.activity-content {
    flex: 1;
}

.activity-text {
    font-size: 0.9375rem;
    color: var(--text-primary);
}

.activity-text strong {
    font-weight: 600;
}

.activity-time {
    font-size: 0.8125rem;
    color: var(--text-light);
    margin-top: 4px;
}

/* --------------------------------------------------------------------------
   User Management
   -------------------------------------------------------------------------- */
.user-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
}

.user-card-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    font-weight: 600;
    font-size: 1rem;
    flex-shrink: 0;
}

.user-card-info {
    flex: 1;
    min-width: 0;
}

.user-card-name {
    font-weight: 600;
    color: var(--text-primary);
}

.user-card-email {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.user-card-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 0.8125rem;
    color: var(--text-light);
    margin-top: 4px;
}

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

/* --------------------------------------------------------------------------
   Folder Tree (Sidebar)
   -------------------------------------------------------------------------- */
.folder-tree {
    list-style: none;
}

.folder-tree-item {
    margin-bottom: 2px;
}

.folder-tree-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.folder-tree-link:hover {
    background: var(--glass-bg);
    color: var(--text-primary);
}

.folder-tree-link.active {
    background: rgba(245, 158, 11, 0.1);
    color: var(--primary);
}

.folder-tree-link svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.folder-tree-toggle {
    padding: 4px;
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    transition: transform var(--transition-fast);
}

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

.folder-tree-children {
    list-style: none;
    padding-left: var(--spacing-lg);
    display: none;
}

.folder-tree-children.show {
    display: block;
}

/* --------------------------------------------------------------------------
   Context Menu
   -------------------------------------------------------------------------- */
.context-menu {
    position: fixed;
    min-width: 180px;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    z-index: var(--z-tooltip);
    padding: var(--spacing-xs);
    display: none;
}

.context-menu.show {
    display: block;
}

.context-menu-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
    color: var(--text-primary);
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.context-menu-item:hover {
    background: var(--glass-bg);
}

.context-menu-item svg {
    width: 16px;
    height: 16px;
    color: var(--text-secondary);
}

.context-menu-divider {
    height: 1px;
    background: var(--glass-border);
    margin: var(--spacing-xs) 0;
}

/* --------------------------------------------------------------------------
   Utilities
   -------------------------------------------------------------------------- */
.d-none { display: none !important; }
.d-flex { display: flex !important; }
.d-block { display: block !important; }
.d-inline { display: inline !important; }
.d-inline-flex { display: inline-flex !important; }

.flex-column { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.align-items-center { align-items: center; }
.align-items-start { align-items: flex-start; }
.align-items-end { align-items: flex-end; }
.justify-content-center { justify-content: center; }
.justify-content-between { justify-content: space-between; }
.justify-content-end { justify-content: flex-end; }
.gap-1 { gap: var(--spacing-xs); }
.gap-2 { gap: var(--spacing-sm); }
.gap-3 { gap: var(--spacing-md); }
.gap-4 { gap: var(--spacing-lg); }

.m-0 { margin: 0 !important; }
.mt-1 { margin-top: var(--spacing-xs) !important; }
.mt-2 { margin-top: var(--spacing-sm) !important; }
.mt-3 { margin-top: var(--spacing-md) !important; }
.mt-4 { margin-top: var(--spacing-lg) !important; }
.mb-1 { margin-bottom: var(--spacing-xs) !important; }
.mb-2 { margin-bottom: var(--spacing-sm) !important; }
.mb-3 { margin-bottom: var(--spacing-md) !important; }
.mb-4 { margin-bottom: var(--spacing-lg) !important; }
.me-2 { margin-right: var(--spacing-sm) !important; }
.ms-auto { margin-left: auto !important; }

.p-0 { padding: 0 !important; }
.p-2 { padding: var(--spacing-sm) !important; }
.p-3 { padding: var(--spacing-md) !important; }
.p-4 { padding: var(--spacing-lg) !important; }

.w-100 { width: 100% !important; }
.text-center { text-align: center !important; }
.text-end { text-align: right !important; }
.fw-bold { font-weight: 600 !important; }
.fw-normal { font-weight: 400 !important; }

.rounded { border-radius: var(--radius-md) !important; }
.rounded-lg { border-radius: var(--radius-lg) !important; }
.shadow { box-shadow: var(--glass-shadow) !important; }

.overflow-hidden { overflow: hidden !important; }
.overflow-auto { overflow: auto !important; }

.cursor-pointer { cursor: pointer !important; }
.user-select-none { user-select: none !important; }

/* Responsive Utilities */
@media (max-width: 767px) {
    .d-md-none { display: none !important; }
}

@media (min-width: 768px) {
    .d-md-flex { display: flex !important; }
    .d-md-block { display: block !important; }
}

@media (min-width: 1024px) {
    .d-lg-flex { display: flex !important; }
    .d-lg-none { display: none !important; }
}

/* --------------------------------------------------------------------------
   Animations
   -------------------------------------------------------------------------- */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.animate-fade-in {
    animation: fadeIn var(--transition-normal) ease;
}

.animate-slide-up {
    animation: slideUp var(--transition-normal) ease;
}

.spinner {
    animation: spin 1s linear infinite;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--glass-border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: var(--z-tooltip);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    min-width: 280px;
    max-width: 400px;
    animation: slideUp var(--transition-normal) ease;
}

.toast svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

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

.toast-message {
    flex: 1;
    font-size: 0.875rem;
}

.toast-close {
    padding: 4px;
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    border-radius: var(--radius-sm);
}

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