/* css/layout.css */
/* App Container */
.app-container {
    display: flex;
    min-height: 100vh;
    background: var(--bg);
}

/* Sidebar */
.sidebar {
    width: 240px;
    background: var(--sidebar-bg);
    color: white;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    overflow-y: auto;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;

    transform: translateX(0);
    transition: transform 0.35s ease, width 0.25s ease;
    z-index: 1000;
}
.sidebar.collapsed {
    width: 72px;
}

.sidebar-header {
    padding: var(--space-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.sidebar-header h1 {
    font-size: 1.25rem;
    color: white;
    white-space: nowrap;
    transition: opacity var(--transition);
}

.sidebar.collapsed .sidebar-header h1 {
    opacity: 0;
    width: 0;
}

.sidebar-nav {
    flex: 1;
    padding: var(--space-md) 0;
}



.nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: all var(--transition-fast);
    cursor: pointer;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.05);
    color: white;
}

.nav-item.active {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border-left-color: var(--primary-500);
}

.nav-item i {
    width: 20px;
    text-align: center;
    font-size: 1.125rem;
}

.nav-item span {
    white-space: nowrap;
    transition: opacity var(--transition);
}

.sidebar.collapsed .nav-item span {
    opacity: 0;
    width: 0;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 240px;
    transition: margin-left var(--transition);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 1;
}

.sidebar.collapsed + .main-content {
    margin-left: 72px;
}

/* Header */
.header {
    position: sticky;
    top: 0;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    padding: var(--space-md) var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 40;
    box-shadow: var(--shadow-sm);
}

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

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

.toggle-btn {
    background: none;
    border: none;
    color: var(--text);
    font-size: 1.25rem;
    cursor: pointer;
    padding: var(--space-sm);
    border-radius: var(--radius);
    transition: background var(--transition-fast);
}

.toggle-btn:hover {
    background: var(--border-light);
}

/* Page Content */
.page-content {
    flex: 1;
    padding: var(--space-lg);
    overflow-y: auto;
    position: relative;
    z-index: 1;
}

.page-header {
    margin-bottom: var(--space-xl);
}

.page-header h2 {
    margin-bottom: var(--space-xs);
}

.page-header p {
    color: var(--text-muted);
    max-width: 600px;
}

/* Grid Layout */
.grid {
    display: grid;
    gap: var(--space-md);
}

.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); }

/* Responsive grid classes (Tailwind-like md: prefix) */
/* md:grid-cols-2 - single column by default, 2 columns on medium+ screens */
.md\:grid-cols-2 {
    grid-template-columns: 1fr;
}

@media (min-width: 769px) {
    .md\:grid-cols-2 {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Gap utilities */
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }

/* Responsive Layout */


@media (max-width: 768px) {
    .grid-cols-2,
    .grid-cols-3,
    .grid-cols-4 {
        grid-template-columns: 1fr;
    }
    
    .page-content {
        padding: var(--space-md);
    }
    
    .header {
        padding: var(--space-sm) var(--space-md);
    }
}

/* Mobile sidebar (768px and below) */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        left: 0;
        transition: transform 0.3s ease;
    }

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

    .sidebar.collapsed {
        width: 240px;
        transform: translateX(-100%);
    }
    
    .sidebar.collapsed.mobile-open {
        transform: translateX(0);
    }

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

/* Tablet sidebar (769px - 1024px) */
@media (min-width: 769px) and (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.mobile-open {
        transform: translateX(0);
    }
    
    .sidebar.collapsed {
        width: 240px;
        transform: translateX(-100%);
    }
    
    .sidebar.collapsed.mobile-open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0 !important;
    }
    
    .grid-cols-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ===== SIDEBAR OVERLAY (MOBILE) ===== */
.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.sidebar-overlay.show {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

/* ===== MOBILE IMPROVEMENTS ===== */
@media (max-width: 768px) {
    /* Ensure sidebar appears above overlay and is clickable */
    .sidebar {
        z-index: 1050 !important;
        pointer-events: auto;
    }
    
    .sidebar.mobile-open {
        z-index: 1050 !important;
        pointer-events: auto;
    }
    
    /* Ensure nav items are clickable */
    .sidebar-nav {
        position: relative;
        z-index: 1;
        pointer-events: auto;
    }
    
    /* Better touch targets for nav items */
    .nav-item {
        min-height: 48px;
        pointer-events: auto;
        cursor: pointer;
    }
    
    /* Header improvements */
    .header {
        position: sticky;
        top: 0;
        z-index: 1100;
    }
    
    /* Toggle button touch target */
    .toggle-btn {
        min-width: 44px;
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
        position: relative;
        z-index: 1101;
        cursor: pointer;
    }
}