/* ==========================================================================
   GRIT Mobile Responsiveness - Comprehensive Mobile-First Fixes
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Variables for Mobile
   -------------------------------------------------------------------------- */
:root {
    --mobile-padding: 12px;
    --mobile-gap: 12px;
    --touch-target-min: 44px;
    --safe-area-top: env(safe-area-inset-top, 0px);
    --safe-area-bottom: env(safe-area-inset-bottom, 0px);
    --safe-area-left: env(safe-area-inset-left, 0px);
    --safe-area-right: env(safe-area-inset-right, 0px);
}

/* --------------------------------------------------------------------------
   Base Mobile Overrides
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    /* Safe area padding for notched devices */
    body {
        padding-top: var(--safe-area-top);
        padding-bottom: var(--safe-area-bottom);
        padding-left: var(--safe-area-left);
        padding-right: var(--safe-area-right);
    }

    /* Container max-width adjustment */
    .container, main.container {
        padding-left: var(--mobile-padding) !important;
        padding-right: var(--mobile-padding) !important;
        max-width: 100% !important;
    }
    
    /* Analytics Tabs - Horizontal Scrollable on Mobile */
    .card[style*="padding: 0"] > div[style*="display: flex"] {
        flex-wrap: nowrap !important;
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch;
        scroll-snap-type: x mandatory;
        scrollbar-width: none;
    }
    
    .card[style*="padding: 0"] > div[style*="display: flex"]::-webkit-scrollbar {
        display: none;
    }
    
    .analytics-tab,
    a.analytics-tab,
    [class*="analytics-tab"] {
        min-width: 90px !important;
        flex: 0 0 auto !important;
        padding: 12px 14px !important;
        font-size: 0.75rem !important;
        scroll-snap-align: start;
        white-space: nowrap;
    }
    
    .analytics-tab i,
    a.analytics-tab i {
        display: none !important;
    }

    /* Fix inline-styled grid layouts */
    [style*="grid-template-columns: 1fr 320px"],
    [style*="grid-template-columns: 1fr 300px"],
    [style*="grid-template-columns: 1fr 380px"] {
        grid-template-columns: 1fr !important;
        gap: 16px !important;
    }

    /* 4-column grids to 2-column */
    [style*="grid-template-columns: repeat(4, 1fr)"] {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 12px !important;
    }

    /* Auto-fit grids adjustment */
    [style*="repeat(auto-fit, minmax(200px, 1fr))"] {
        grid-template-columns: repeat(2, 1fr) !important;
    }

    /* Cards - reduced padding */
    .card {
        padding: 16px !important;
        border-radius: 12px !important;
    }

    /* All buttons - touch friendly */
    button, .btn, [role="button"] {
        min-height: var(--touch-target-min);
        min-width: var(--touch-target-min);
    }

    /* Prevent iOS zoom on form focus */
    input, select, textarea {
        font-size: 16px !important;
    }
}

/* --------------------------------------------------------------------------
   Week Calendar - Horizontal Scroll on Mobile
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    #weekCalendar {
        display: flex !important;
        flex-direction: row !important;
        overflow-x: auto !important;
        scroll-snap-type: x mandatory;
        -webkit-overflow-scrolling: touch;
        gap: 8px !important;
        padding-bottom: 8px !important;
        margin: 0 -12px !important;
        padding-left: 12px !important;
        padding-right: 12px !important;
    }

    #weekCalendar > div {
        min-width: 100px !important;
        flex-shrink: 0 !important;
        scroll-snap-align: start;
    }

    /* Hide scrollbar but keep functionality */
    #weekCalendar::-webkit-scrollbar {
        height: 4px;
    }
    #weekCalendar::-webkit-scrollbar-track {
        background: var(--bg-secondary);
        border-radius: 2px;
    }
    #weekCalendar::-webkit-scrollbar-thumb {
        background: var(--border-color);
        border-radius: 2px;
    }
}

/* --------------------------------------------------------------------------
   Dashboard Week Summary Stats
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    /* Week summary 4-column to 2-column */
    #weekCalendar + div,
    [style*="repeat(4, 1fr)"][style*="background: var(--bg-secondary)"] {
        grid-template-columns: repeat(2, 1fr) !important;
    }

    /* Smaller font sizes for week stats */
    #weekWorkouts, #weekTime, #weekDistance, #weekGrit {
        font-size: 1.4rem !important;
    }
}

/* --------------------------------------------------------------------------
   Performance Management Chart Section
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    /* Reduce chart height on mobile */
    [style*="height: 280px"] canvas,
    #fitnessChart {
        height: 200px !important;
    }

    /* CTL/ATL/TSB grid - 2x2 */
    .metric-item {
        padding: 10px !important;
    }

    #formZoneIndicator {
        flex-direction: column !important;
        text-align: center !important;
        gap: 12px !important;
    }

    #rampRateWarning {
        width: 100% !important;
        text-align: center !important;
    }
}

/* --------------------------------------------------------------------------
   Training Calendar Page (8-column grid fix)
   -------------------------------------------------------------------------- */
@media (max-width: 900px) {
    /* Calendar grid - reduce columns */
    #planCalendar,
    [style*="grid-template-columns: repeat(8, 1fr)"] {
        grid-template-columns: repeat(7, 1fr) !important;
    }

    /* Hide weekly summary column on tablets */
    .week-summary-column,
    #planCalendar > div:nth-child(8n) {
        display: none !important;
    }
}

@media (max-width: 600px) {
    /* Switch to single-column list view on phones */
    #planCalendar,
    [style*="grid-template-columns: repeat(8, 1fr)"],
    [style*="grid-template-columns: repeat(7, 1fr)"] {
        grid-template-columns: 1fr !important;
        gap: 8px !important;
    }

    .calendar-day, .plan-day {
        min-height: auto !important;
        padding: 12px !important;
        display: flex !important;
        flex-direction: row !important;
        align-items: center !important;
        gap: 12px !important;
    }

    /* Reorganize day content for list view */
    .calendar-day .day-header,
    .plan-day .day-header {
        min-width: 60px !important;
        text-align: center !important;
    }

    .calendar-day .day-content,
    .plan-day .day-content {
        flex: 1 !important;
    }
}

/* --------------------------------------------------------------------------
   Workout Library Sidebar
   -------------------------------------------------------------------------- */
@media (max-width: 900px) {
    #workoutLibrarySidebar,
    .workout-library-sidebar {
        position: fixed !important;
        bottom: 0 !important;
        left: 0 !important;
        right: 0 !important;
        top: auto !important;
        width: 100% !important;
        max-height: 70vh !important;
        border-radius: 20px 20px 0 0 !important;
        z-index: 1000 !important;
        transform: translateY(calc(100% - 60px)) !important;
        transition: transform 0.3s ease !important;
        box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.3) !important;
    }

    #workoutLibrarySidebar.expanded,
    .workout-library-sidebar.expanded {
        transform: translateY(0) !important;
    }

    /* Handle for dragging */
    #workoutLibrarySidebar::before,
    .workout-library-sidebar::before {
        content: '';
        display: block;
        width: 40px;
        height: 4px;
        background: var(--border-color);
        border-radius: 2px;
        margin: 12px auto;
    }
}

/* --------------------------------------------------------------------------
   Statistics Page
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    /* Stats grid - full width cards */
    .stats-grid,
    [style*="repeat(auto-fit, minmax(280px, 1fr))"] {
        grid-template-columns: 1fr !important;
    }

    /* Period selector - horizontal scroll */
    .period-selector,
    [style*="display: flex"][style*="gap"] {
        flex-wrap: nowrap !important;
        overflow-x: auto !important;
        padding-bottom: 8px !important;
    }

    /* Stat cards */
    .stat-card {
        padding: 16px !important;
    }

    /* Chart containers */
    canvas {
        max-height: 250px !important;
    }
}

/* --------------------------------------------------------------------------
   Header & Navigation Mobile
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    header {
        padding: 12px var(--mobile-padding) !important;
    }

    header .container {
        flex-direction: column !important;
        gap: 12px !important;
    }

    .logo {
        font-size: 1.5rem !important;
    }

    nav {
        width: 100% !important;
        justify-content: center !important;
        flex-wrap: wrap !important;
        gap: 4px !important;
    }

    nav a {
        padding: 8px 12px !important;
        font-size: 0.8rem !important;
    }

    /* Hide nav text, show only icons */
    nav a span.nav-text {
        display: none !important;
    }

    /* Dropdown menus */
    .nav-dropdown .dropdown-menu {
        position: fixed !important;
        left: 50% !important;
        transform: translateX(-50%) !important;
        width: 90vw !important;
        max-width: 300px !important;
    }
}

@media (max-width: 480px) {
    nav a {
        padding: 10px !important;
        font-size: 1rem !important;
    }

    nav a i {
        font-size: 1.1rem !important;
    }
}

/* --------------------------------------------------------------------------
   Modals - Full Screen on Mobile
   -------------------------------------------------------------------------- */
@media (max-width: 600px) {
    .modal-content {
        width: 100% !important;
        max-width: 100% !important;
        height: 100vh !important;
        max-height: 100vh !important;
        border-radius: 0 !important;
        margin: 0 !important;
        padding: 20px !important;
        overflow-y: auto !important;
    }

    /* Modal close button */
    .modal-close, [onclick*="closeModal"] {
        position: fixed !important;
        top: 16px !important;
        right: 16px !important;
        z-index: 1001 !important;
    }
}

/* --------------------------------------------------------------------------
   Forms on Mobile
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    .form-row,
    [style*="display: flex"][style*="gap"] {
        flex-direction: column !important;
        gap: 12px !important;
    }

    .form-group {
        width: 100% !important;
    }

    input, select, textarea {
        padding: 14px !important;
        font-size: 16px !important;
    }

    /* Full width buttons */
    .btn-group,
    .button-group {
        flex-direction: column !important;
        gap: 8px !important;
    }

    .btn-group .btn,
    .button-group .btn {
        width: 100% !important;
    }
}

/* --------------------------------------------------------------------------
   Tables - Responsive Horizontal Scroll
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    table {
        display: block !important;
        overflow-x: auto !important;
        white-space: nowrap !important;
        -webkit-overflow-scrolling: touch !important;
    }

    th, td {
        padding: 10px 8px !important;
        font-size: 0.85rem !important;
    }

    /* Alternative: Stack table rows */
    .table-stack-mobile {
        display: block !important;
    }

    .table-stack-mobile thead {
        display: none !important;
    }

    .table-stack-mobile tr {
        display: block !important;
        margin-bottom: 16px !important;
        border: 1px solid var(--border-color) !important;
        border-radius: 8px !important;
        padding: 12px !important;
    }

    .table-stack-mobile td {
        display: flex !important;
        justify-content: space-between !important;
        padding: 8px 0 !important;
        border: none !important;
    }

    .table-stack-mobile td::before {
        content: attr(data-label);
        font-weight: 600;
        color: var(--text-secondary);
    }
}

/* --------------------------------------------------------------------------
   Training List Cards
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    .training-card {
        padding: 14px !important;
    }

    .training-card-header {
        flex-direction: column !important;
        gap: 8px !important;
        align-items: flex-start !important;
    }

    .training-card-stats {
        display: grid !important;
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 8px !important;
    }

    .training-card-stat {
        text-align: center !important;
        padding: 8px !important;
        background: var(--bg-secondary) !important;
        border-radius: 6px !important;
    }
}

/* --------------------------------------------------------------------------
   Zone Distribution Bar
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    #zoneDistributionBar {
        height: 32px !important;
        font-size: 0.65rem !important;
    }

    /* Zone labels */
    [id^="zone"][id$="Percent"] {
        font-size: 0.8rem !important;
    }
}

/* --------------------------------------------------------------------------
   Manual Training Form
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    #manualEntryForm,
    #addTrainingModal .modal-content {
        padding: 16px !important;
    }

    /* Quick entry button - fixed at bottom */
    #quickAddBtn,
    .quick-add-fab {
        position: fixed !important;
        bottom: calc(20px + var(--safe-area-bottom)) !important;
        right: 20px !important;
        width: 56px !important;
        height: 56px !important;
        border-radius: 50% !important;
        z-index: 999 !important;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3) !important;
    }
}

/* --------------------------------------------------------------------------
   Utility Classes for Mobile
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    .mobile-hide { display: none !important; }
    .mobile-show { display: block !important; }
    .mobile-flex { display: flex !important; }
    .mobile-grid { display: grid !important; }
    .mobile-stack { flex-direction: column !important; }
    .mobile-center { text-align: center !important; justify-content: center !important; }
    .mobile-full-width { width: 100% !important; }
    .mobile-gap-sm { gap: 8px !important; }
    .mobile-gap-md { gap: 12px !important; }
    .mobile-p-sm { padding: 12px !important; }
    .mobile-p-md { padding: 16px !important; }
    .mobile-mb-sm { margin-bottom: 12px !important; }
    .mobile-mb-md { margin-bottom: 16px !important; }
    .mobile-text-sm { font-size: 0.85rem !important; }
    .mobile-text-xs { font-size: 0.75rem !important; }
}

@media (min-width: 769px) {
    .desktop-hide { display: none !important; }
    .desktop-show { display: block !important; }
}

/* --------------------------------------------------------------------------
   Touch Interactions
   -------------------------------------------------------------------------- */
@media (hover: none) and (pointer: coarse) {
    /* Remove hover effects on touch devices */
    .card:hover,
    .btn:hover,
    button:hover {
        transform: none !important;
    }

    /* Add active states instead */
    .card:active,
    .btn:active,
    button:active {
        transform: scale(0.98) !important;
        opacity: 0.9 !important;
    }

    /* Larger tap targets */
    a, button, .clickable {
        min-height: 44px;
        min-width: 44px;
    }
}

/* --------------------------------------------------------------------------
   Bottom Navigation (Optional Mobile Nav)
   -------------------------------------------------------------------------- */
.mobile-bottom-nav {
    display: none;
}

@media (max-width: 768px) {
    .mobile-bottom-nav {
        display: flex !important;
        position: fixed !important;
        bottom: 0 !important;
        left: 0 !important;
        right: 0 !important;
        background: var(--bg-primary) !important;
        border-top: 1px solid var(--border-color) !important;
        padding: 8px 0 calc(8px + var(--safe-area-bottom)) !important;
        z-index: 1000 !important;
        justify-content: space-around !important;
        box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1) !important;
    }

    .mobile-bottom-nav a {
        display: flex !important;
        flex-direction: column !important;
        align-items: center !important;
        gap: 4px !important;
        padding: 8px 16px !important;
        color: var(--text-secondary) !important;
        text-decoration: none !important;
        font-size: 0.7rem !important;
        transition: color 0.2s !important;
    }

    .mobile-bottom-nav a.active,
    .mobile-bottom-nav a:hover {
        color: var(--grit-orange) !important;
    }

    .mobile-bottom-nav a i {
        font-size: 1.2rem !important;
    }

    /* Add bottom padding to body when bottom nav is present */
    body.has-bottom-nav {
        padding-bottom: calc(70px + var(--safe-area-bottom)) !important;
    }
}

/* --------------------------------------------------------------------------
   Smooth Scrolling & Pull to Refresh
   -------------------------------------------------------------------------- */
html {
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
}

/* Pull to refresh container */
.pull-to-refresh {
    position: relative;
    overflow: hidden;
}

.pull-to-refresh::before {
    content: '';
    position: absolute;
    top: -50px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 30px;
    border: 3px solid var(--border-color);
    border-top-color: var(--grit-orange);
    border-radius: 50%;
    opacity: 0;
    transition: opacity 0.3s, top 0.3s;
}

.pull-to-refresh.refreshing::before {
    top: 20px;
    opacity: 1;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: translateX(-50%) rotate(360deg); }
}

/* --------------------------------------------------------------------------
   New Pages - Activity, Wellness, Pace Curve Mobile Fixes
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    /* Activity Page */
    .activity-content {
        grid-template-columns: 1fr !important;
        gap: 16px !important;
    }
    
    .activity-sidebar {
        order: 2;
    }
    
    .activity-main {
        order: 1;
    }
    
    .quick-stats {
        grid-template-columns: repeat(2, 1fr) !important;
    }
    
    /* Wellness Page */
    .wellness-grid {
        grid-template-columns: 1fr !important;
    }
    
    .wellness-metrics {
        grid-template-columns: 1fr !important;
    }
    
    .readiness-breakdown {
        grid-template-columns: 1fr !important;
    }
    
    /* Pace Curve Page */
    .improvement-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }
    
    .race-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }
    
    .power-model-stats {
        grid-template-columns: 1fr !important;
    }
    
    /* Analytics Tabs - Scrollable on mobile */
    .analytics-tab-container,
    [class*="analytics-tab"] {
        scroll-snap-type: x mandatory;
    }
    
    .analytics-tab {
        scroll-snap-align: start;
    }
}

/* --------------------------------------------------------------------------
   Touch-Friendly Enhancements
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    /* Larger touch targets */
    .slider-container input[type="range"] {
        height: 40px;
        cursor: pointer;
    }
    
    /* Better button spacing */
    .btn {
        min-height: 44px;
        min-width: 44px;
        padding: 12px 16px;
    }
    
    /* Tappable cards */
    .workout-indicator,
    .trend-card,
    .improvement-card,
    .race-card {
        cursor: pointer;
        -webkit-tap-highlight-color: rgba(191, 26, 47, 0.1);
    }
    
    /* Smooth scrolling for tables */
    .table-wrapper,
    .laps-container,
    .history-table-wrapper,
    .best-efforts-container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: thin;
    }
    
    /* Hide scrollbar on mobile but keep functionality */
    .table-wrapper::-webkit-scrollbar,
    .laps-container::-webkit-scrollbar {
        height: 4px;
    }
}

/* --------------------------------------------------------------------------
   Chart Containers - Mobile Optimized
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    .chart-container,
    .curve-container,
    .trend-card {
        padding: 12px !important;
    }
    
    canvas {
        max-height: 220px !important;
    }
    
    .chart-wrapper,
    .curve-chart-wrapper,
    .trend-chart-container {
        height: 200px !important;
    }
}

/* --------------------------------------------------------------------------
   Safe Area Padding for Notched Phones
   -------------------------------------------------------------------------- */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
    .mobile-bottom-nav {
        padding-bottom: calc(8px + env(safe-area-inset-bottom)) !important;
    }
    
    main.container {
        padding-bottom: calc(80px + env(safe-area-inset-bottom)) !important;
    }
}

/* --------------------------------------------------------------------------
   Landscape Mode Adjustments
   -------------------------------------------------------------------------- */
@media (max-height: 500px) and (orientation: landscape) {
    header {
        padding: 8px var(--mobile-padding) !important;
    }

    .modal-content {
        max-height: 90vh !important;
        overflow-y: auto !important;
    }

    #weekCalendar > div {
        min-height: 60px !important;
    }
    
    /* Keep charts smaller in landscape */
    canvas {
        max-height: 150px !important;
    }
    
    .mobile-bottom-nav {
        height: 50px !important;
    }
}

/* --------------------------------------------------------------------------
   iOS Specific Fixes
   -------------------------------------------------------------------------- */
@supports (-webkit-touch-callout: none) {
    /* Fix for iOS rubber-banding */
    body {
        overscroll-behavior-y: none;
    }
    
    /* Fix 100vh issue on iOS */
    .full-height {
        height: -webkit-fill-available;
    }
    
    /* Better touch scrolling */
    .scroll-container {
        -webkit-overflow-scrolling: touch;
    }
}

/* --------------------------------------------------------------------------
   Print Styles
   -------------------------------------------------------------------------- */
@media print {
    header, nav, .mobile-bottom-nav, .fab, button {
        display: none !important;
    }

    body {
        padding: 0 !important;
        background: white !important;
        color: black !important;
    }

    .card {
        border: 1px solid #ccc !important;
        box-shadow: none !important;
        break-inside: avoid !important;
    }
}