/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --info-color: #3b82f6;
    
    /* Light theme */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --shadow-light: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-heavy: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    
    /* Sidebar */
    --sidebar-width: 280px;
    --sidebar-width-collapsed: 80px;
    --sidebar-bg: #1e293b;
    --sidebar-text: #cbd5e1;
    --sidebar-text-active: #ffffff;
    --sidebar-hover: #334155;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    
    /* Typography */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    overflow-x: hidden;
}

/* Preloader */
.preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

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

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-md);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* App Container */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
    transition: width var(--transition-normal);
    z-index: 1000;
    overflow: hidden;
}

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

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    min-height: 80px;
}

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



.logo-text {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--sidebar-text-active);
    white-space: nowrap;
    transition: opacity var(--transition-normal);
}

.sidebar.collapsed .logo-text {
    opacity: 0;
}

.sidebar-toggle {
    background: none;
    border: none;
    color: var(--sidebar-text);
    font-size: var(--font-size-lg);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    flex-shrink: 0;
    min-width: 40px;
    min-height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar-toggle:hover {
    background: var(--sidebar-hover);
    color: var(--sidebar-text-active);
}

/* Ensure toggle button is always visible */
.sidebar.collapsed .sidebar-toggle {
    opacity: 1;
}

/* Expand button for collapsed sidebar on desktop */
.sidebar-expand-btn {
    position: fixed;
    top: 20px;
    left: 20px;
    width: 44px;
    height: 44px;
    background: var(--primary-color);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    cursor: pointer;
    z-index: 1002;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-medium);
}

.sidebar-expand-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-heavy);
}

/* Sidebar Navigation */
.sidebar-nav {
    flex: 1;
    padding: var(--spacing-lg) 0;
    overflow-y: auto;
}

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

.nav-item {
    margin-bottom: var(--spacing-xs);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--sidebar-text);
    text-decoration: none;
    transition: all var(--transition-fast);
    position: relative;
    white-space: nowrap;
}

.nav-link:hover {
    background: var(--sidebar-hover);
    color: var(--sidebar-text-active);
}

.nav-link.active {
    background: var(--primary-color);
    color: var(--sidebar-text-active);
}

.nav-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--sidebar-text-active);
}

.nav-link i {
    font-size: var(--font-size-lg);
    width: 20px;
    text-align: center;
}

.nav-text {
    transition: opacity var(--transition-normal);
}

.sidebar.collapsed .nav-text {
    opacity: 0;
}

.nav-badge {
    background: var(--error-color);
    color: white;
    font-size: var(--font-size-xs);
    padding: 2px 6px;
    border-radius: 10px;
    margin-left: auto;
    transition: opacity var(--transition-normal);
}

.sidebar.collapsed .nav-badge {
    opacity: 0;
}

/* Submenu styles */
.nav-item.has-submenu {
    position: relative;
}

.submenu-arrow {
    margin-left: auto;
    font-size: 0.75rem;
    transition: transform var(--transition-fast);
}

.nav-item.has-submenu.open .submenu-arrow {
    transform: rotate(180deg);
}

.nav-submenu {
    list-style: none;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
    background: rgba(0, 0, 0, 0.1);
    margin: 0;
    padding: 0;
}

.nav-item.has-submenu.open .nav-submenu {
    max-height: 200px;
}

.nav-subitem {
    margin: 0;
}

.nav-sublink {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md) var(--spacing-sm) 3rem;
    color: var(--sidebar-text);
    text-decoration: none;
    transition: all var(--transition-fast);
    position: relative;
    font-size: 0.875rem;
}

.nav-sublink:hover {
    background: var(--sidebar-hover);
    color: var(--sidebar-text-active);
}

.nav-sublink.active {
    background: var(--primary-color);
    color: var(--sidebar-text-active);
}

.nav-sublink i {
    width: 16px;
    text-align: center;
    font-size: 0.875rem;
}

.sidebar.collapsed .nav-submenu {
    display: none;
}

.sidebar.collapsed .submenu-arrow {
    display: none;
}



/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: margin-left var(--transition-normal);
}

.sidebar.collapsed + .main-content {
    margin-left: var(--sidebar-width-collapsed);
}

/* Header */
.header {
    background: var(--bg-primary);
    padding: var(--spacing-lg) var(--spacing-xl);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
    box-shadow: var(--shadow-light);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

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

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

.breadcrumb-separator {
    color: var(--text-muted);
}

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

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

/* Search */
.search-container {
    position: relative;
    display: flex;
    align-items: center;
}

.search-input {
    width: 300px;
    padding: var(--spacing-sm) var(--spacing-md);
    padding-right: 40px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    background: var(--bg-secondary);
    transition: all var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-btn {
    position: absolute;
    right: 8px;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--spacing-xs);
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.header-btn {
    position: relative;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

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

.header-btn .badge {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--error-color);
    color: white;
    font-size: 10px;
    padding: 2px 5px;
    border-radius: 10px;
    transform: translate(25%, -25%);
}

/* Page Content */
.page-content {
    flex: 1;
    padding: var(--spacing-xl);
    overflow-y: auto;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .mobile-sidebar-toggle {
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
        visibility: visible !important;
        opacity: 1 !important;
    }
    
    .sidebar {
        transform: translateX(-100%);
        transition: transform var(--transition-normal);
        z-index: 1001;
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .search-input {
        width: 200px;
    }
    
    /* Add overlay when sidebar is open on mobile */
    .sidebar.open::after {
        content: '';
        position: fixed;
        top: 0;
        left: var(--sidebar-width);
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: -1;
    }
}

@media (max-width: 768px) {
    .header {
        padding: var(--spacing-md);
        flex-wrap: wrap;
        gap: var(--spacing-md);
    }
    
    .header-left {
        flex: 1;
        min-width: 0;
    }
    
    .header-right {
        flex-shrink: 0;
    }
    
    .header-actions {
        gap: var(--spacing-xs);
    }
    
    .search-input {
        width: 150px;
    }
    
    .page-content {
        padding: var(--spacing-md);
    }
    
    .user-info-header .user-details {
        display: none;
    }
    
    .breadcrumb {
        display: none;
    }
}

@media (max-width: 480px) {
    .search-container {
        display: none;
    }
    
    .page-title {
        font-size: var(--font-size-lg);
    }
    
    .header-actions {
        gap: var(--spacing-xs);
    }
    
    .header-btn {
        padding: var(--spacing-xs);
    }
    
    .user-info-header {
        padding: var(--spacing-xs);
    }
    
    .page-content {
        padding: var(--spacing-sm);
    }
    
    /* Ensure mobile button is visible on very small screens */
    .mobile-sidebar-toggle {
        display: flex !important;
        min-width: 44px !important;
        min-height: 44px !important;
        background: #007bff !important;
        color: white !important;
        align-items: center !important;
        justify-content: center !important;
        visibility: visible !important;
        opacity: 1 !important;
        margin-right: 8px !important;
        padding: 8px !important;
    }
}

/* Extra small screens */
@media (max-width: 320px) {
    .mobile-sidebar-toggle {
        display: flex !important;
        min-width: 40px !important;
        min-height: 40px !important;
        background: #007bff !important;
        color: white !important;
        font-size: 16px !important;
        padding: 6px !important;
        margin-right: 6px !important;
    }
    
    .page-title {
        font-size: 1rem !important;
    }
}

/* Mobile Sidebar Toggle */
.mobile-sidebar-toggle {
    display: none;
    background: #007bff !important;
    border: 2px solid #0056b3 !important;
    font-size: 18px !important;
    color: white !important;
    cursor: pointer;
    padding: 8px !important;
    border-radius: 6px !important;
    margin-right: 12px !important;
    transition: all 0.2s ease !important;
    min-width: 44px !important;
    min-height: 44px !important;
    z-index: 9999 !important;
    position: relative !important;
}

.mobile-sidebar-toggle:hover {
    background: #0056b3 !important;
    transform: scale(1.05) !important;
    box-shadow: 0 2px 8px rgba(0, 123, 255, 0.3) !important;
}

/* Authentication styles */
.user-info-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

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

.user-info-header .user-details {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.user-info-header .user-name {
    font-weight: 500;
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    line-height: 1.2;
}

.user-info-header .user-role {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    line-height: 1.2;
}

.user-info-header .logout-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    font-size: var(--font-size-sm);
}

.user-info-header .logout-btn:hover {
    background: var(--error-color);
    color: white;
}

/* Dark theme styles for user info */
[data-theme="dark"] .user-info-header {
    background: var(--bg-secondary);
    border-color: var(--border-color);
}

[data-theme="dark"] .user-info-header .user-name {
    color: var(--text-primary);
}

[data-theme="dark"] .user-info-header .user-role {
    color: var(--text-secondary);
}

[data-theme="dark"] .user-info-header .logout-btn {
    color: var(--text-secondary);
}

[data-theme="dark"] .user-info-header .logout-btn:hover {
    background: var(--error-color);
    color: white;
}

/* Improved mobile navigation */
@media (max-width: 1024px) {
    .nav-item.has-submenu .submenu-arrow {
        transition: transform var(--transition-fast);
    }
    
    .nav-item.has-submenu.open .submenu-arrow {
        transform: rotate(180deg);
    }
}

/* Better touch targets for mobile */
@media (max-width: 768px) {
    .nav-link, .nav-sublink {
        padding: var(--spacing-md);
        min-height: 48px;
        display: flex;
        align-items: center;
    }
    
    .header-btn {
        min-width: 44px;
        min-height: 44px;
    }
    
    .mobile-sidebar-toggle {
        display: flex !important;
        min-width: 44px !important;
        min-height: 44px !important;
        background: #007bff !important;
        color: white !important;
    }
}

/* Admin-only elements */
.admin-only {
    display: none;
}

.user-admin .admin-only {
    display: block;
}

/* Modal styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.modal-content {
    background: white;
    border-radius: 8px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    margin: 0;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 4px;
    transition: all 0.2s;
}

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

.modal-body {
    padding: 1.5rem;
}

.modal-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 2rem;
}