.app-container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background-color: var(--bg-sidebar);
    color: var(--text-sidebar);
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: transform var(--transition);
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1.25rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.logo {
    width: 36px;
    height: 36px;
}

.brand-name {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--text-light);
}

.sidebar-toggle {
    display: none;
    margin-left: auto;
    background: none;
    border: none;
    color: var(--text-sidebar);
    cursor: pointer;
    padding: 0.25rem;
}

.sidebar-nav {
    flex: 1;
    padding: 1rem 0;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.25rem;
    color: var(--text-sidebar);
    transition: all var(--transition);
    text-decoration: none;
}

.nav-item:hover {
    background-color: var(--bg-sidebar-hover);
    color: var(--text-light);
}

.nav-item.active {
    background-color: var(--bg-sidebar-active);
    color: var(--text-light);
}

.nav-item svg {
    flex-shrink: 0;
}

.nav-section {
    padding: 1rem 1.25rem 0.5rem;
}

.nav-section-title {
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    font-weight: 600;
}

.sidebar-footer {
    padding: 1rem 1.25rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    flex: 1;
    min-width: 0;
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    background-color: var(--brand-primary);
    color: var(--text-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: var(--font-size-sm);
    flex-shrink: 0;
}

.user-details {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.user-name {
    font-weight: 500;
    color: var(--text-light);
    font-size: var(--font-size-sm);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-role {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    text-transform: capitalize;
}

.logout-btn {
    padding: 0.5rem;
    color: var(--text-sidebar);
    transition: color var(--transition);
}

.logout-btn:hover {
    color: var(--error);
}

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

.top-header {
    height: var(--header-height);
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    position: sticky;
    top: 0;
    z-index: 50;
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: 0.5rem;
    margin-right: 1rem;
}

.breadcrumb {
    font-weight: 600;
    font-size: var(--font-size-lg);
}

.content-area {
    flex: 1;
    padding: 1.5rem;
}

.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0,0,0,0.5);
    z-index: 90;
}

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--bg-sidebar) 0%, #0f172a 100%);
    padding: 1rem;
}

.login-container {
    width: 100%;
    max-width: 400px;
}

.login-card {
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-lg);
}

.login-header {
    text-align: center;
    margin-bottom: 1.5rem;
}

.login-logo {
    width: 64px;
    height: 64px;
    margin-bottom: 1rem;
}

.login-header h1 {
    font-size: var(--font-size-2xl);
    margin-bottom: 0.25rem;
}

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

.login-form .form-group {
    margin-bottom: 1.25rem;
}

.login-footer {
    text-align: center;
    color: var(--text-muted);
    font-size: var(--font-size-xs);
    margin-top: 1.5rem;
}

.error-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.error-container h1 {
    font-size: 6rem;
    color: var(--brand-primary);
    margin-bottom: 0.5rem;
}

.error-container p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.page-header {
    margin-bottom: 1.5rem;
}

.page-header h2 {
    margin-bottom: 0.25rem;
}

.page-header p {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

.dashboard h2 {
    margin-bottom: 0.25rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    margin-top: 1.5rem;
}

.stat-card {
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: var(--shadow);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius);
    background-color: var(--brand-primary-light);
    color: var(--brand-primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-content {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
}

.stat-label {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

.quick-actions {
    margin-top: 2rem;
}

.quick-actions h3 {
    margin-bottom: 1rem;
}

.actions-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.action-card {
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    text-align: center;
    color: var(--text-primary);
    box-shadow: var(--shadow);
    transition: all var(--transition);
    border: 2px solid transparent;
}

.action-card:hover {
    border-color: var(--brand-primary);
    color: var(--brand-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.action-card svg {
    color: var(--brand-primary);
}

.action-card span {
    font-weight: 500;
    font-size: var(--font-size-sm);
}

@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .sidebar-overlay.active {
        display: block;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .mobile-toggle {
        display: block;
    }
    
    .sidebar-toggle {
        display: block;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .actions-grid {
        grid-template-columns: 1fr;
    }
    
    .content-area {
        padding: 1rem;
    }
}