/* ========================================
   UNIFIED RESPONSIVE CSS
   AI Autopilot Ads - All Device Support
   
   Box Model: MARGIN → BORDER → PADDING → CONTENT
   
   Breakpoints:
   - Desktop XL: > 1600px
   - Desktop: > 1200px
   - Tablet Landscape: > 1024px
   - Tablet Portrait: > 768px
   - Mobile Large: > 480px
   - Mobile Small: ≤ 480px
   ======================================== */

/* ========================================
   1. CSS VARIABLES - Responsive Spacing
   ======================================== */
:root {
    /* Responsive Page Content Padding */
    --page-padding-x: 32px;
    --page-padding-y: 24px;
    
    /* Responsive Card Spacing */
    --card-padding: 20px;
    --card-margin: 16px;
    --card-gap: 16px;
    
    /* Grid gaps */
    --grid-gap: 24px;
    --grid-gap-sm: 16px;
    
    /* Consistent border radius */
    --card-radius: 12px;
    --btn-radius: 8px;
    --input-radius: 8px;
}

/* ========================================
   2. BASE LAYOUT STRUCTURE
   ======================================== */

/* Main content area - consistent across all pages */
.main-content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    background: var(--bg-primary);
    transition: margin-left var(--transition-normal);
}

/* Page content wrapper */
.page-content,
.dashboard-content,
.campaigns-content,
.ads-content,
.orders-content,
.insights-content,
.recommendations-content,
.autopilot-content,
.settings-content,
.connections-content {
    padding: var(--page-padding-y) var(--page-padding-x);
    max-width: var(--content-max-width);
    margin: 0 auto;
}

/* Header - consistent across all pages */
.header,
.top-header,
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--page-padding-x);
    height: var(--header-height);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-primary);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    flex-wrap: wrap;
    gap: 12px;
}

.header-left,
.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* ========================================
   3. CARD COMPONENTS - Unified Styling
   ======================================== */

/* Base card styling */
.card,
.stat-card,
.metric-card,
.content-card,
.data-card {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--card-radius);
    padding: var(--card-padding);
    margin-bottom: var(--card-margin);
    transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.card:hover,
.stat-card:hover,
.metric-card:hover {
    border-color: var(--border-secondary);
}

/* Stats grid - 4 columns on desktop */
.stats-grid,
.stats-row,
.campaign-stats,
.metric-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--grid-gap);
    margin-bottom: var(--card-margin);
}

/* Content grids */
.content-grid,
.ads-grid,
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--grid-gap);
    margin-bottom: var(--card-margin);
}

/* Two column layout */
.two-column-layout,
.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--grid-gap);
}

/* ========================================
   4. FORM ELEMENTS - Consistent Sizing
   ======================================== */

/* Filter bars */
.filters-bar,
.filter-section,
.toolbar {
    display: flex;
    align-items: flex-end;
    gap: var(--grid-gap-sm);
    margin-bottom: var(--card-margin);
    padding: var(--card-padding);
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--card-radius);
    flex-wrap: wrap;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 120px;
}

.filter-group label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Inputs and selects */
input[type="text"],
input[type="email"],
input[type="password"],
input[type="search"],
input[type="number"],
select,
textarea {
    padding: 10px 14px;
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: var(--input-radius);
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: border-color var(--transition-fast);
    width: 100%;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
}

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

.search-box input {
    padding-left: 40px;
    min-width: 200px;
}

.search-box svg,
.search-icon {
    position: absolute;
    left: 12px;
    color: var(--text-muted);
    pointer-events: none;
}

/* ========================================
   5. BUTTONS - Consistent Sizing
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: var(--btn-radius);
    font-size: 0.875rem;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.75rem;
}

.btn-lg {
    padding: 14px 24px;
    font-size: 1rem;
}

/* ========================================
   6. TABLES - Responsive
   ======================================== */

.table-container,
.data-table-wrapper {
    overflow-x: auto;
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--card-radius);
    margin-bottom: var(--card-margin);
}

.data-table,
.campaigns-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 800px; /* Enables horizontal scroll on mobile */
}

.data-table th,
.data-table td,
.campaigns-table th,
.campaigns-table td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-primary);
}

.data-table th,
.campaigns-table th {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: var(--bg-secondary);
}

/* ========================================
   7. UTILITY CLASSES - Responsive Visibility
   ======================================== */

/* Hide on specific breakpoints */
.hide-mobile { display: block; }
.hide-tablet { display: block; }
.hide-desktop { display: none; }
.show-mobile-only { display: none; }
.show-tablet-only { display: none; }

/* ========================================
   8. RESPONSIVE BREAKPOINTS
   ======================================== */

/* ----------------------------------------
   DESKTOP XL (> 1600px)
   ---------------------------------------- */
@media (min-width: 1600px) {
    :root {
        --page-padding-x: 48px;
        --page-padding-y: 32px;
        --grid-gap: 32px;
    }
}

/* ----------------------------------------
   TABLET LANDSCAPE (≤ 1200px)
   ---------------------------------------- */
@media (max-width: 1200px) {
    :root {
        --page-padding-x: 24px;
        --grid-gap: 20px;
    }
    
    /* 2 columns for stats */
    .stats-grid,
    .stats-row,
    .campaign-stats,
    .metric-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* Two column becomes single */
    .two-column-layout,
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}

/* ----------------------------------------
   TABLET PORTRAIT (≤ 1024px)
   ---------------------------------------- */
@media (max-width: 1024px) {
    :root {
        --sidebar-width: 0;
    }
    
    /* Sidebar becomes overlay */
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        width: 280px;
        transform: translateX(-100%);
        z-index: var(--z-modal);
        transition: transform var(--transition-normal);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    /* Show mobile menu button */
    .mobile-menu-btn {
        display: flex !important;
    }
    
    /* Sidebar overlay */
    .sidebar-overlay {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: calc(var(--z-modal) - 1);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }
    
    .sidebar-overlay.active {
        opacity: 1;
        visibility: visible;
    }
    
    /* Filters stack */
    .filters-bar {
        flex-direction: column;
        align-items: stretch;
    }
    
    .filter-group {
        width: 100%;
    }
}

/* ----------------------------------------
   TABLET PORTRAIT / MOBILE (≤ 768px)
   ---------------------------------------- */
@media (max-width: 768px) {
    :root {
        --page-padding-x: 16px;
        --page-padding-y: 16px;
        --card-padding: 16px;
        --grid-gap: 16px;
        --header-height: 60px;
    }
    
    /* Base font size reduction */
    html {
        font-size: 13px;
    }
    
    /* Header adjustments */
    .header,
    .top-header,
    .page-header {
        padding: 0 var(--page-padding-x);
        height: auto;
        min-height: var(--header-height);
        padding-top: 12px;
        padding-bottom: 12px;
    }
    
    .header-left,
    .header-right {
        flex-wrap: wrap;
        gap: 8px;
    }
    
    .page-title {
        font-size: 1.25rem;
    }
    
    /* Hide breadcrumb on mobile */
    .breadcrumb {
        display: none;
    }
    
    /* Stats become 2 columns */
    .stats-grid,
    .stats-row,
    .campaign-stats,
    .metric-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    
    /* Cards grid single column */
    .content-grid,
    .ads-grid,
    .cards-grid {
        grid-template-columns: 1fr;
    }
    
    /* Search box */
    .search-box {
        width: 100%;
    }
    
    .search-box input {
        min-width: unset;
        width: 100%;
    }
    
    /* Buttons */
    .btn {
        padding: 8px 14px;
        font-size: 0.8rem;
    }
    
    /* Hide non-essential elements */
    .hide-mobile {
        display: none !important;
    }
    
    .show-mobile-only {
        display: block !important;
    }
    
    /* Table responsive */
    .data-table,
    .campaigns-table {
        min-width: 600px;
    }
    
    .data-table th,
    .data-table td,
    .campaigns-table th,
    .campaigns-table td {
        padding: 12px 10px;
        font-size: 0.8rem;
    }
    
    /* Live status banner - stack */
    .live-status-banner {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
    
    .status-left,
    .status-right {
        justify-content: center;
        flex-wrap: wrap;
    }
}

/* ----------------------------------------
   MOBILE SMALL (≤ 480px)
   ---------------------------------------- */
@media (max-width: 480px) {
    :root {
        --page-padding-x: 12px;
        --page-padding-y: 12px;
        --card-padding: 12px;
        --grid-gap: 12px;
    }
    
    html {
        font-size: 12px;
    }
    
    /* Single column for stats */
    .stats-grid,
    .stats-row,
    .campaign-stats,
    .metric-grid {
        grid-template-columns: 1fr;
    }
    
    /* Stat card compact */
    .stat-card,
    .metric-card {
        padding: 12px;
    }
    
    .stat-value,
    .metric-value {
        font-size: 1.25rem;
    }
    
    /* Page title smaller */
    .page-title {
        font-size: 1.1rem;
    }
    
    /* Header becomes minimal */
    .header-right {
        width: 100%;
        justify-content: space-between;
    }
    
    /* Smaller buttons */
    .btn {
        padding: 6px 10px;
        font-size: 0.75rem;
    }
    
    .btn svg {
        width: 14px;
        height: 14px;
    }
    
    /* Filter selects full width */
    .filter-group select {
        padding: 8px 10px;
    }
    
    /* Chart containers */
    .chart-container {
        height: 200px !important;
    }
    
    /* Card titles */
    .card-title,
    .section-title {
        font-size: 0.9rem;
    }
}

/* ========================================
   9. MOBILE MENU BUTTON
   ======================================== */

/* Hidden by default on desktop */
.mobile-menu-btn {
    display: none;
    width: 40px;
    height: 40px;
    padding: 8px;
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--btn-radius);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.mobile-menu-btn:hover {
    background: var(--bg-hover);
    border-color: var(--border-secondary);
}

.mobile-menu-btn svg {
    width: 100%;
    height: 100%;
}

/* Sidebar close button (mobile) */
.sidebar-close-btn {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 32px;
    height: 32px;
    padding: 6px;
    background: transparent;
    border: none;
    border-radius: 50%;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: none;
}

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

.sidebar-close-btn svg {
    width: 100%;
    height: 100%;
}

/* Sidebar overlay */
.sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: calc(var(--z-modal) - 1);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.sidebar-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Show mobile menu on tablet and below */
@media (max-width: 1024px) {
    .mobile-menu-btn {
        display: flex !important;
        align-items: center;
        justify-content: center;
    }
    
    .sidebar-close-btn {
        display: block;
    }
}

/* ========================================
   11. TOUCH DEVICE OPTIMIZATIONS
   ======================================== */
@media (pointer: coarse) {
    /* Larger touch targets */
    .btn,
    .nav-item,
    .action-btn {
        min-height: 44px;
        min-width: 44px;
    }
    
    .data-table td,
    .campaigns-table td {
        padding: 16px 12px;
    }
    
    /* Disable hover effects that don't work on touch */
    .card:hover,
    .stat-card:hover,
    .btn:hover {
        transform: none;
    }
}

/* ========================================
   12. REDUCED MOTION ACCESSIBILITY
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ========================================
   13. HIGH CONTRAST MODE
   ======================================== */
@media (prefers-contrast: high) {
    :root {
        --border-primary: rgba(255, 255, 255, 0.3);
        --border-secondary: rgba(255, 255, 255, 0.5);
    }
    
    .btn {
        border: 2px solid currentColor;
    }
    
    .card,
    .stat-card,
    .metric-card {
        border-width: 2px;
    }
}

/* ========================================
   14. PRINT STYLES
   ======================================== */
@media print {
    .sidebar,
    .header-actions,
    .filters-bar,
    .btn,
    .mobile-menu-btn,
    .sync-btn {
        display: none !important;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .page-content,
    .dashboard-content {
        padding: 0;
    }
    
    .card,
    .stat-card {
        break-inside: avoid;
        border: 1px solid #ccc;
    }
}