/* ============================================
   Responsive Layout Fixes
   Mobile/Tablet Horizontal Scroll Prevention
   ============================================ */

/* ============================================
   1. Global Viewport Width Constraints
   ============================================ */

/* Tablet and below (max-width: 1024px) */
@media (max-width: 1024px) {
    /* Prevent horizontal scroll at root level */
    html, body {
        overflow-x: hidden !important;
        max-width: 100vw !important;
    }

    .app-layout {
        max-width: 100vw !important;
        overflow-x: hidden !important;
    }

    /* Main wrapper full width constraint */
    .main-wrapper {
        margin-left: 0 !important;
        width: 100% !important;
        max-width: 100vw !important;
        overflow-x: hidden !important;
    }

    /* Main content full width with proper box-sizing */
    .main-content {
        width: 100% !important;
        max-width: 100vw !important;
        box-sizing: border-box !important;
        overflow-x: hidden !important;
    }

    /* Sidebar hidden by default, slides in from left */
    .sidebar {
        transform: translateX(-100%);
        width: var(--sidebar-width, 260px);
    }

    /* Show sidebar elements when opened */
    .sidebar .brand-text,
    .sidebar .nav-text,
    .sidebar .user-info,
    .sidebar .user-actions {
        opacity: 1 !important;
        width: auto !important;
        overflow: visible !important;
    }

    .sidebar .sidebar-header {
        justify-content: space-between !important;
    }

    .sidebar .nav-link {
        justify-content: flex-start !important;
        padding: 12px 16px !important;
    }

    .sidebar .user-menu {
        justify-content: flex-start !important;
        padding: 12px !important;
    }

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

/* ============================================
   2. Mobile (max-width: 768px)
   ============================================ */

@media (max-width: 768px) {
    /* Double-ensure no horizontal scroll */
    html, body {
        overflow-x: hidden !important;
        max-width: 100vw !important;
    }

    .app-layout {
        max-width: 100vw !important;
        overflow-x: hidden !important;
    }

    /* Main wrapper */
    .main-wrapper {
        margin-left: 0 !important;
        padding-top: 56px !important;
        width: 100% !important;
        max-width: 100vw !important;
        overflow-x: hidden !important;
    }

    /* Main content */
    .main-content {
        padding: 16px !important;
        width: 100% !important;
        max-width: 100vw !important;
        box-sizing: border-box !important;
        overflow-x: hidden !important;
    }

    /* Mobile header improvements */
    .mobile-header {
        z-index: var(--z-header, 500);
    }

    /* Mobile actions - user menu clickability */
    .mobile-actions {
        display: flex;
        gap: 4px;
        z-index: 1;
        position: relative;
    }

    .mobile-actions .icon-btn {
        min-width: 40px;
        min-height: 40px;
        touch-action: manipulation;
        -webkit-tap-highlight-color: transparent;
        cursor: pointer;
    }

    /* Mobile user dropdown accessibility */
    .mobile-user-dropdown {
        position: absolute;
        top: calc(100% + 8px);
        right: 0;
        min-width: 180px;
        background: var(--bg-surface, #ffffff);
        border: 1px solid var(--border-default, #e4e4e7);
        border-radius: 10px;
        box-shadow: var(--shadow-lg, 0 10px 15px -3px rgba(0, 0, 0, 0.1));
        padding: 6px;
        z-index: calc(var(--z-header, 500) + 10);
    }

    /* Page header */
    .page-header h1 {
        font-size: 22px;
    }
}

/* ============================================
   3. Small Mobile (max-width: 640px)
   ============================================ */

@media (max-width: 640px) {
    .main-content {
        padding: 12px !important;
        width: 100% !important;
        max-width: 100vw !important;
        box-sizing: border-box !important;
    }

    .page-header h1 {
        font-size: 20px;
    }

    /* Larger touch targets */
    .mobile-actions .icon-btn {
        min-width: 44px;
        min-height: 44px;
    }
}

/* ============================================
   4. Extra Small Mobile (max-width: 375px)
   ============================================ */

@media (max-width: 375px) {
    html, body {
        overflow-x: hidden !important;
        max-width: 100vw !important;
    }

    .app-layout {
        max-width: 100vw !important;
        overflow-x: hidden !important;
    }

    .main-wrapper {
        width: 100% !important;
        max-width: 100vw !important;
        overflow-x: hidden !important;
    }

    .main-content {
        padding: 10px !important;
        width: 100% !important;
        max-width: 100vw !important;
        box-sizing: border-box !important;
        overflow-x: hidden !important;
    }

    .page-header h1 {
        font-size: 18px;
    }

    .mobile-header {
        padding: 0 12px;
    }

    .mobile-brand span {
        font-size: 14px;
    }
}

/* ============================================
   5. Dark Mode Support for Mobile Components
   ============================================ */

[data-theme="dark"] .mobile-user-dropdown {
    background: var(--bg-surface, #0f172a);
    border-color: var(--border-default, #1e293b);
}

/* ============================================
   6. Accessibility Improvements
   ============================================ */

/* Focus visible styles for mobile buttons */
.mobile-menu-btn:focus-visible,
.mobile-actions .icon-btn:focus-visible {
    outline: 2px solid var(--color-primary-500, #6366f1);
    outline-offset: 2px;
}

/* Ensure sidebar links are focusable when open */
.sidebar.mobile-open .nav-link:focus-visible {
    outline: 2px solid var(--color-primary-500, #6366f1);
    outline-offset: 2px;
}

/* ============================================
   7. [CRITICAL] Tablet Sidebar Overlay Fix (768-1024px)
   Issue: Overlay blocks page interactions on tablet
   Fix: Hide overlay by default, only show when sidebar open
   ============================================ */

@media (min-width: 768px) and (max-width: 1024px) {
    /* Tablet: Hide overlay by default to prevent click blocking */
    .sidebar-overlay {
        display: none !important;
        pointer-events: none !important;
        opacity: 0 !important;
    }

    /* Only enable overlay when sidebar is explicitly opened on tablet */
    .sidebar.mobile-open ~ .sidebar-overlay,
    .sidebar-overlay.active {
        display: block !important;
        pointer-events: auto !important;
        opacity: 1 !important;
    }
}

/* ============================================
   8. [HIGH] Mobile Header Hamburger Menu Fix (768px and below)
   Issue: Hamburger menu button not visible on mobile
   Fix: Ensure mobile-header and mobile-menu-btn are visible
   ============================================ */

@media (max-width: 768px) {
    /* Ensure mobile header is visible and properly positioned */
    .mobile-header {
        display: flex !important;
        visibility: visible !important;
        opacity: 1 !important;
        position: fixed !important;
        top: 0 !important;
        left: 0 !important;
        right: 0 !important;
        height: 56px !important;
        z-index: var(--z-header, 500) !important;
        background: var(--bg-surface, #ffffff) !important;
        border-bottom: 1px solid var(--border-default, #e4e4e7) !important;
        padding: 0 16px !important;
        align-items: center !important;
        justify-content: space-between !important;
    }

    /* Ensure hamburger button is visible and clickable */
    .mobile-menu-btn {
        display: flex !important;
        visibility: visible !important;
        opacity: 1 !important;
        width: 44px !important;
        height: 44px !important;
        min-width: 44px !important;
        min-height: 44px !important;
        align-items: center !important;
        justify-content: center !important;
        background: transparent !important;
        border: none !important;
        border-radius: 8px !important;
        color: var(--text-primary, #18181b) !important;
        cursor: pointer !important;
        z-index: 1 !important;
        flex-shrink: 0 !important;
    }

    .mobile-menu-btn i {
        font-size: 20px !important;
        display: block !important;
    }

    .mobile-menu-btn:hover,
    .mobile-menu-btn:active {
        background: var(--interactive-hover, #fafafa) !important;
    }

    /* Mobile overlay behavior - hidden by default */
    .sidebar-overlay {
        display: none;
        pointer-events: none;
    }

    /* Show overlay only when sidebar is open */
    .sidebar.mobile-open ~ .sidebar-overlay,
    .sidebar-overlay.active {
        display: block !important;
        pointer-events: auto !important;
    }
}

/* ============================================
   9. Dark Mode Support for Mobile Header Fix
   ============================================ */

@media (max-width: 768px) {
    [data-theme="dark"] .mobile-header {
        background: var(--bg-surface, #0f172a) !important;
        border-color: var(--border-default, #1e293b) !important;
    }

    [data-theme="dark"] .mobile-menu-btn {
        color: var(--text-primary, #f8fafc) !important;
    }

    [data-theme="dark"] .mobile-menu-btn:hover,
    [data-theme="dark"] .mobile-menu-btn:active {
        background: var(--interactive-hover, #1e293b) !important;
    }
}