/* FeelSchool Fluent Design Theme
   Inspired by Microsoft Fluent Design System (D365 style)
   Supports light and dark modes via data-theme attribute
*/

/* ============================================
   CSS Variables - Light Mode (Default)
   ============================================ */
:root {
    /* Primary Colors */
    --fs-primary: #0078D4;
    --fs-primary-hover: #106EBE;
    --fs-primary-active: #005A9E;
    --fs-secondary: #10B981;
    --fs-secondary-hover: #059669;

    /* Background Colors */
    --fs-bg-primary: #FFFFFF;
    --fs-bg-secondary: #F3F2F1;
    --fs-bg-tertiary: #EDEBE9;
    --fs-bg-elevated: #FFFFFF;
    --fs-bg-sidebar: #FAF9F8;

    /* Text Colors */
    --fs-text-primary: #201F1E;
    --fs-text-secondary: #605E5C;
    --fs-text-tertiary: #8A8886;
    --fs-text-disabled: #A19F9D;
    --fs-text-on-primary: #FFFFFF;

    /* Border Colors */
    --fs-border: #E1DFDD;
    --fs-border-strong: #C8C6C4;
    --fs-border-focus: #0078D4;

    /* Status Colors */
    --fs-success: #107C10;
    --fs-success-bg: #DFF6DD;
    --fs-warning: #FFB900;
    --fs-warning-bg: #FFF4CE;
    --fs-error: #D13438;
    --fs-error-bg: #FDE7E9;
    --fs-info: #0078D4;
    --fs-info-bg: #DEECF9;

    /* Shadows */
    --fs-shadow-2: 0 1.6px 3.6px rgba(0, 0, 0, 0.13), 0 0.3px 0.9px rgba(0, 0, 0, 0.1);
    --fs-shadow-4: 0 3.2px 7.2px rgba(0, 0, 0, 0.13), 0 0.6px 1.8px rgba(0, 0, 0, 0.1);
    --fs-shadow-8: 0 6.4px 14.4px rgba(0, 0, 0, 0.13), 0 1.2px 3.6px rgba(0, 0, 0, 0.1);
    --fs-shadow-16: 0 12.8px 28.8px rgba(0, 0, 0, 0.13), 0 2.4px 7.2px rgba(0, 0, 0, 0.1);

    /* Typography */
    --fs-font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', 'Helvetica Neue', sans-serif;
    --fs-font-size-xs: 0.75rem;
    --fs-font-size-sm: 0.8125rem;
    --fs-font-size-base: 0.875rem;
    --fs-font-size-lg: 1rem;
    --fs-font-size-xl: 1.25rem;
    --fs-font-size-2xl: 1.5rem;
    --fs-font-size-3xl: 2rem;

    /* Spacing */
    --fs-spacing-xs: 0.25rem;
    --fs-spacing-sm: 0.5rem;
    --fs-spacing-md: 1rem;
    --fs-spacing-lg: 1.5rem;
    --fs-spacing-xl: 2rem;

    /* Border Radius */
    --fs-radius-sm: 2px;
    --fs-radius-md: 4px;
    --fs-radius-lg: 8px;

    /* Transitions */
    --fs-transition-fast: 0.1s ease;
    --fs-transition-normal: 0.2s ease;
    --fs-transition-slow: 0.3s ease;

    /* Layout */
    --fs-sidebar-width: 250px;
    --fs-sidebar-collapsed-width: 60px;
    --fs-navbar-height: 48px;
}

/* ============================================
   CSS Variables - Dark Mode
   ============================================ */
[data-theme="dark"] {
    /* Background Colors */
    --fs-bg-primary: #1B1A19;
    --fs-bg-secondary: #252423;
    --fs-bg-tertiary: #323130;
    --fs-bg-elevated: #292827;
    --fs-bg-sidebar: #201F1E;

    /* Text Colors */
    --fs-text-primary: #F3F2F1;
    --fs-text-secondary: #D2D0CE;
    --fs-text-tertiary: #A19F9D;
    --fs-text-disabled: #605E5C;

    /* Border Colors */
    --fs-border: #484644;
    --fs-border-strong: #605E5C;

    /* Status Colors (adjusted for dark bg) */
    --fs-success-bg: rgba(16, 124, 16, 0.2);
    --fs-warning-bg: rgba(255, 185, 0, 0.2);
    --fs-error-bg: rgba(209, 52, 56, 0.2);
    --fs-info-bg: rgba(0, 120, 212, 0.2);

    /* Shadows (adjusted for dark) */
    --fs-shadow-2: 0 1.6px 3.6px rgba(0, 0, 0, 0.4), 0 0.3px 0.9px rgba(0, 0, 0, 0.32);
    --fs-shadow-4: 0 3.2px 7.2px rgba(0, 0, 0, 0.4), 0 0.6px 1.8px rgba(0, 0, 0, 0.32);
    --fs-shadow-8: 0 6.4px 14.4px rgba(0, 0, 0, 0.4), 0 1.2px 3.6px rgba(0, 0, 0, 0.32);
    --fs-shadow-16: 0 12.8px 28.8px rgba(0, 0, 0, 0.4), 0 2.4px 7.2px rgba(0, 0, 0, 0.32);
}

/* ============================================
   Base Styles
   ============================================ */
html {
    font-family: var(--fs-font-family);
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background-color: var(--fs-bg-secondary);
    color: var(--fs-text-primary);
    transition: background-color var(--fs-transition-normal), color var(--fs-transition-normal);
}

/* ============================================
   Layout Components
   ============================================ */

/* Sidebar Navigation */
.fs-sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: var(--fs-sidebar-width);
    height: 100vh;
    background-color: var(--fs-bg-sidebar);
    border-right: 1px solid var(--fs-border);
    display: flex;
    flex-direction: column;
    transition: width var(--fs-transition-slow);
    z-index: 1000;
    overflow: hidden;
}

.fs-sidebar.collapsed {
    width: var(--fs-sidebar-collapsed-width);
}

.fs-sidebar-header {
    display: flex;
    align-items: center;
    padding: var(--fs-spacing-md);
    height: var(--fs-navbar-height);
    border-bottom: 1px solid var(--fs-border);
}

.fs-sidebar-logo {
    display: flex;
    align-items: center;
    gap: var(--fs-spacing-sm);
    color: var(--fs-primary);
    font-weight: 600;
    font-size: var(--fs-font-size-lg);
    text-decoration: none;
    white-space: nowrap;
    overflow: hidden;
}

.fs-sidebar-logo i {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.fs-sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: var(--fs-spacing-sm) 0;
}

.fs-nav-section {
    padding: var(--fs-spacing-md) var(--fs-spacing-md) var(--fs-spacing-xs);
}

.fs-nav-section-title {
    font-size: var(--fs-font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--fs-text-tertiary);
    margin-bottom: var(--fs-spacing-xs);
    white-space: nowrap;
    overflow: hidden;
}

.fs-nav-item {
    display: flex;
    align-items: center;
    padding: var(--fs-spacing-sm) var(--fs-spacing-md);
    color: var(--fs-text-secondary);
    text-decoration: none;
    border-radius: var(--fs-radius-md);
    margin: 2px var(--fs-spacing-sm);
    transition: background-color var(--fs-transition-fast), color var(--fs-transition-fast);
    white-space: nowrap;
    overflow: hidden;
}

.fs-nav-item:hover {
    background-color: var(--fs-bg-tertiary);
    color: var(--fs-text-primary);
}

.fs-nav-item.active {
    background-color: var(--fs-primary);
    color: var(--fs-text-on-primary);
}

.fs-nav-item i {
    width: 20px;
    text-align: center;
    margin-right: var(--fs-spacing-sm);
    flex-shrink: 0;
}

.fs-sidebar.collapsed .fs-nav-item span,
.fs-sidebar.collapsed .fs-nav-section-title,
.fs-sidebar.collapsed .fs-sidebar-logo span {
    opacity: 0;
    width: 0;
}

/* Main Content Area */
.fs-main {
    margin-left: var(--fs-sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: var(--fs-bg-secondary);
    transition: margin-left var(--fs-transition-slow);
}

.fs-sidebar.collapsed ~ .fs-main {
    margin-left: var(--fs-sidebar-collapsed-width);
}

/* Navbar / Command Bar */
.fs-navbar {
    position: sticky;
    top: 0;
    height: var(--fs-navbar-height);
    background-color: var(--fs-bg-primary);
    border-bottom: 1px solid var(--fs-border);
    display: flex;
    align-items: center;
    padding: 0 var(--fs-spacing-md);
    z-index: 100;
    box-shadow: var(--fs-shadow-2);
}

.fs-navbar-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    color: var(--fs-text-secondary);
    border-radius: var(--fs-radius-md);
    cursor: pointer;
    transition: background-color var(--fs-transition-fast);
}

.fs-navbar-toggle:hover {
    background-color: var(--fs-bg-tertiary);
}

.fs-navbar-actions {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: var(--fs-spacing-sm);
}

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

/* Footer */
.fs-footer {
    padding: var(--fs-spacing-md);
    text-align: center;
    color: var(--fs-text-tertiary);
    font-size: var(--fs-font-size-sm);
    border-top: 1px solid var(--fs-border);
    background-color: var(--fs-bg-primary);
}

/* ============================================
   Card Component
   ============================================ */
.fs-card {
    background-color: var(--fs-bg-primary);
    border: 1px solid var(--fs-border);
    border-radius: var(--fs-radius-lg);
    box-shadow: var(--fs-shadow-2);
    transition: box-shadow var(--fs-transition-fast), border-color var(--fs-transition-fast);
}

.fs-card:hover {
    box-shadow: var(--fs-shadow-4);
}

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

.fs-card-title {
    font-size: var(--fs-font-size-lg);
    font-weight: 600;
    color: var(--fs-text-primary);
    margin: 0;
}

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

.fs-card-footer {
    padding: var(--fs-spacing-md);
    border-top: 1px solid var(--fs-border);
    background-color: var(--fs-bg-secondary);
    border-radius: 0 0 var(--fs-radius-lg) var(--fs-radius-lg);
}

/* ============================================
   Button Components
   ============================================ */
.fs-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--fs-spacing-xs);
    padding: var(--fs-spacing-sm) var(--fs-spacing-md);
    font-family: var(--fs-font-family);
    font-size: var(--fs-font-size-base);
    font-weight: 600;
    border-radius: var(--fs-radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--fs-transition-fast);
    white-space: nowrap;
    text-decoration: none;
}

.fs-btn:focus {
    outline: none;
    box-shadow: 0 0 0 2px var(--fs-bg-primary), 0 0 0 4px var(--fs-border-focus);
}

.fs-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Primary Button */
.fs-btn-primary {
    background-color: var(--fs-primary);
    color: var(--fs-text-on-primary);
    border-color: var(--fs-primary);
}

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

.fs-btn-primary:active:not(:disabled) {
    background-color: var(--fs-primary-active);
    border-color: var(--fs-primary-active);
}

/* Secondary Button */
.fs-btn-secondary {
    background-color: transparent;
    color: var(--fs-text-primary);
    border-color: var(--fs-border-strong);
}

.fs-btn-secondary:hover:not(:disabled) {
    background-color: var(--fs-bg-tertiary);
}

/* Danger Button */
.fs-btn-danger {
    background-color: var(--fs-error);
    color: var(--fs-text-on-primary);
    border-color: var(--fs-error);
}

.fs-btn-danger:hover:not(:disabled) {
    background-color: #a52a2a;
    border-color: #a52a2a;
}

/* Success Button */
.fs-btn-success {
    background-color: var(--fs-success);
    color: var(--fs-text-on-primary);
    border-color: var(--fs-success);
}

.fs-btn-success:hover:not(:disabled) {
    background-color: #0b5c0b;
    border-color: #0b5c0b;
}

/* Ghost Button (icon only) */
.fs-btn-ghost {
    background-color: transparent;
    color: var(--fs-text-secondary);
    border: none;
    padding: var(--fs-spacing-sm);
}

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

/* Button Sizes */
.fs-btn-sm {
    padding: 4px var(--fs-spacing-sm);
    font-size: var(--fs-font-size-sm);
}

.fs-btn-lg {
    padding: var(--fs-spacing-sm) var(--fs-spacing-lg);
    font-size: var(--fs-font-size-lg);
}

/* ============================================
   Form Components
   ============================================ */
.fs-form-group {
    margin-bottom: var(--fs-spacing-md);
}

.fs-label {
    display: block;
    font-size: var(--fs-font-size-base);
    font-weight: 600;
    color: var(--fs-text-primary);
    margin-bottom: var(--fs-spacing-xs);
}

.fs-input {
    width: 100%;
    padding: var(--fs-spacing-sm) var(--fs-spacing-sm);
    font-family: var(--fs-font-family);
    font-size: var(--fs-font-size-base);
    color: var(--fs-text-primary);
    background-color: var(--fs-bg-primary);
    border: 1px solid var(--fs-border-strong);
    border-radius: var(--fs-radius-md);
    transition: border-color var(--fs-transition-fast), box-shadow var(--fs-transition-fast);
}

.fs-input:hover {
    border-color: var(--fs-text-tertiary);
}

.fs-input:focus {
    outline: none;
    border-color: var(--fs-primary);
    box-shadow: 0 0 0 1px var(--fs-primary);
}

.fs-input::placeholder {
    color: var(--fs-text-disabled);
}

.fs-input:disabled {
    background-color: var(--fs-bg-secondary);
    color: var(--fs-text-disabled);
    cursor: not-allowed;
}

/* Select */
.fs-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23605E5C' d='M2 4l4 4 4-4z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--fs-spacing-sm) center;
    padding-right: calc(var(--fs-spacing-md) + 12px);
}

/* Textarea */
.fs-textarea {
    min-height: 100px;
    resize: vertical;
}

/* Form validation */
.fs-input.is-invalid {
    border-color: var(--fs-error);
}

.fs-input.is-invalid:focus {
    box-shadow: 0 0 0 1px var(--fs-error);
}

.fs-validation-message {
    font-size: var(--fs-font-size-sm);
    color: var(--fs-error);
    margin-top: var(--fs-spacing-xs);
}

/* ============================================
   Table Component (DetailsList style)
   ============================================ */
.fs-table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--fs-bg-primary);
    border: 1px solid var(--fs-border);
    border-radius: var(--fs-radius-lg);
    overflow: hidden;
}

.fs-table th {
    text-align: left;
    padding: var(--fs-spacing-sm) var(--fs-spacing-md);
    background-color: var(--fs-bg-secondary);
    color: var(--fs-text-secondary);
    font-size: var(--fs-font-size-sm);
    font-weight: 600;
    border-bottom: 1px solid var(--fs-border);
    white-space: nowrap;
}

.fs-table td {
    padding: var(--fs-spacing-sm) var(--fs-spacing-md);
    color: var(--fs-text-primary);
    border-bottom: 1px solid var(--fs-border);
}

.fs-table tbody tr {
    transition: background-color var(--fs-transition-fast);
}

.fs-table tbody tr:hover {
    background-color: var(--fs-bg-secondary);
}

.fs-table tbody tr:last-child td {
    border-bottom: none;
}

.fs-table tbody tr.selected {
    background-color: var(--fs-info-bg);
}

/* ============================================
   Badge Component
   ============================================ */
.fs-badge {
    display: inline-flex;
    align-items: center;
    padding: 2px var(--fs-spacing-sm);
    font-size: var(--fs-font-size-xs);
    font-weight: 600;
    border-radius: var(--fs-radius-sm);
    white-space: nowrap;
}

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

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

.fs-badge-warning {
    background-color: var(--fs-warning-bg);
    color: #946200;
}

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

.fs-badge-neutral {
    background-color: var(--fs-bg-tertiary);
    color: var(--fs-text-secondary);
}

/* ============================================
   Alert Component
   ============================================ */
.fs-alert {
    display: flex;
    align-items: flex-start;
    gap: var(--fs-spacing-sm);
    padding: var(--fs-spacing-md);
    border-radius: var(--fs-radius-md);
    border-left: 4px solid;
}

.fs-alert-info {
    background-color: var(--fs-info-bg);
    border-color: var(--fs-info);
    color: var(--fs-text-primary);
}

.fs-alert-success {
    background-color: var(--fs-success-bg);
    border-color: var(--fs-success);
    color: var(--fs-text-primary);
}

.fs-alert-warning {
    background-color: var(--fs-warning-bg);
    border-color: var(--fs-warning);
    color: var(--fs-text-primary);
}

.fs-alert-error {
    background-color: var(--fs-error-bg);
    border-color: var(--fs-error);
    color: var(--fs-text-primary);
}

/* ============================================
   Theme Toggle Button
   ============================================ */
.fs-theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    color: var(--fs-text-secondary);
    border-radius: var(--fs-radius-md);
    cursor: pointer;
    transition: background-color var(--fs-transition-fast), color var(--fs-transition-fast), transform var(--fs-transition-normal);
}

.fs-theme-toggle:hover {
    background-color: var(--fs-bg-tertiary);
    color: var(--fs-text-primary);
    transform: rotate(15deg);
}

.fs-theme-toggle i {
    font-size: 1.125rem;
}

/* ============================================
   User Menu / Dropdown
   ============================================ */
.fs-user-menu {
    position: relative;
}

.fs-user-btn {
    display: flex;
    align-items: center;
    gap: var(--fs-spacing-sm);
    padding: var(--fs-spacing-xs) var(--fs-spacing-sm);
    background: transparent;
    border: none;
    color: var(--fs-text-secondary);
    border-radius: var(--fs-radius-md);
    cursor: pointer;
    transition: background-color var(--fs-transition-fast);
}

.fs-user-btn:hover {
    background-color: var(--fs-bg-tertiary);
}

.fs-user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: var(--fs-primary);
    color: var(--fs-text-on-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--fs-font-size-sm);
    font-weight: 600;
}

.fs-dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: var(--fs-spacing-xs);
    min-width: 200px;
    background-color: var(--fs-bg-primary);
    border: 1px solid var(--fs-border);
    border-radius: var(--fs-radius-lg);
    box-shadow: var(--fs-shadow-8);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity var(--fs-transition-fast), transform var(--fs-transition-fast), visibility var(--fs-transition-fast);
}

.fs-dropdown-menu.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.fs-dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--fs-spacing-sm);
    padding: var(--fs-spacing-sm) var(--fs-spacing-md);
    color: var(--fs-text-primary);
    text-decoration: none;
    transition: background-color var(--fs-transition-fast);
}

.fs-dropdown-item:hover {
    background-color: var(--fs-bg-secondary);
}

.fs-dropdown-item i {
    width: 20px;
    color: var(--fs-text-tertiary);
}

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

/* ============================================
   Loading States
   ============================================ */
.fs-skeleton {
    background: linear-gradient(90deg, var(--fs-bg-tertiary) 25%, var(--fs-bg-secondary) 50%, var(--fs-bg-tertiary) 75%);
    background-size: 200% 100%;
    animation: fs-skeleton-pulse 1.5s ease-in-out infinite;
    border-radius: var(--fs-radius-md);
}

@keyframes fs-skeleton-pulse {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.fs-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--fs-border);
    border-top-color: var(--fs-primary);
    border-radius: 50%;
    animation: fs-spin 0.8s linear infinite;
}

@keyframes fs-spin {
    to { transform: rotate(360deg); }
}

/* ============================================
   Page Title Section
   ============================================ */
.fs-page-header {
    margin-bottom: var(--fs-spacing-lg);
}

.fs-page-title {
    font-size: var(--fs-font-size-2xl);
    font-weight: 600;
    color: var(--fs-text-primary);
    margin: 0 0 var(--fs-spacing-xs) 0;
}

.fs-page-subtitle {
    font-size: var(--fs-font-size-base);
    color: var(--fs-text-secondary);
    margin: 0;
}

/* ============================================
   Stats Cards (Dashboard)
   ============================================ */
.fs-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--fs-spacing-md);
    margin-bottom: var(--fs-spacing-lg);
}

.fs-stat-card {
    background-color: var(--fs-bg-primary);
    border: 1px solid var(--fs-border);
    border-radius: var(--fs-radius-lg);
    padding: var(--fs-spacing-md);
    display: flex;
    align-items: flex-start;
    gap: var(--fs-spacing-md);
}

.fs-stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--fs-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

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

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

.fs-stat-icon.warning {
    background-color: var(--fs-warning-bg);
    color: #946200;
}

.fs-stat-icon.danger {
    background-color: var(--fs-error-bg);
    color: var(--fs-error);
}

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

.fs-stat-value {
    font-size: var(--fs-font-size-2xl);
    font-weight: 600;
    color: var(--fs-text-primary);
    line-height: 1.2;
}

.fs-stat-label {
    font-size: var(--fs-font-size-sm);
    color: var(--fs-text-secondary);
}

/* ============================================
   Responsive Adjustments
   ============================================ */
@media (max-width: 768px) {
    :root {
        --fs-sidebar-width: 0px;
        --fs-sidebar-collapsed-width: 0px;
    }

    .fs-sidebar {
        transform: translateX(-100%);
        width: 250px;
    }

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

    .fs-main {
        margin-left: 0;
    }

    .fs-sidebar.collapsed ~ .fs-main {
        margin-left: 0;
    }

    .fs-content {
        padding: var(--fs-spacing-md);
    }

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

/* Mobile sidebar overlay */
.fs-sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 999;
}

@media (max-width: 768px) {
    .fs-sidebar.open ~ .fs-sidebar-overlay {
        display: block;
    }
}

/* ============================================
   Utility Classes
   ============================================ */
.fs-text-primary { color: var(--fs-text-primary); }
.fs-text-secondary { color: var(--fs-text-secondary); }
.fs-text-tertiary { color: var(--fs-text-tertiary); }
.fs-text-success { color: var(--fs-success); }
.fs-text-warning { color: var(--fs-warning); }
.fs-text-error { color: var(--fs-error); }
.fs-text-info { color: var(--fs-info); }

.fs-bg-primary { background-color: var(--fs-bg-primary); }
.fs-bg-secondary { background-color: var(--fs-bg-secondary); }
.fs-bg-tertiary { background-color: var(--fs-bg-tertiary); }

.fs-border { border: 1px solid var(--fs-border); }
.fs-border-top { border-top: 1px solid var(--fs-border); }
.fs-border-bottom { border-bottom: 1px solid var(--fs-border); }

.fs-rounded { border-radius: var(--fs-radius-md); }
.fs-rounded-lg { border-radius: var(--fs-radius-lg); }

.fs-shadow { box-shadow: var(--fs-shadow-4); }
.fs-shadow-lg { box-shadow: var(--fs-shadow-8); }