/* Layout Container */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Sidebar Layout */
.layout-with-sidebar {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background: var(--color-surface);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    transition: transform var(--transition-base);
    z-index: var(--z-fixed);
}

.sidebar-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.sidebar-nav {
    flex: 1;
    padding: var(--spacing-md);
}

.sidebar-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-xs);
    transition: all var(--transition-fast);
    cursor: pointer;
    gap: var(--spacing-md);
}

.nav-item:hover {
    background: var(--color-surface-hover);
    color: var(--color-text);
}

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

.nav-icon {
    width: 20px;
    height: 20px;
}

/* Main Content Area */
.main-content {
    flex: 1;
    margin-left: 260px;
    display: flex;
    flex-direction: column;
}

.top-bar {
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
}

.page-content {
    flex: 1;
    padding: var(--spacing-xl);
}

/* Page Header */
.page-header {
    margin-bottom: var(--spacing-xl);
}

.page-title {
    font-size: 1.875rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.page-description {
    color: var(--color-text-secondary);
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-cols-1 {
    grid-template-columns: repeat(1, 1fr);
}

.grid-cols-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-cols-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text);
}

/* Responsive */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.mobile-active {
        transform: translateX(0);
    }

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

    .grid-cols-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-cols-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .grid-cols-2 {
        grid-template-columns: 1fr;
    }

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

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