/**
 * ENNU Luxury Responsive Styles
 *
 * Mobile-first responsive design for the ENNU luxury clinic experience.
 * Optimized for iPad clinic usage with touch-friendly interactions.
 *
 * @package ENNU\Infrastructure\Styles
 * @since 2.2.0
 *
 * Breakpoints:
 * - Mobile: 0-767px
 * - Tablet/iPad: 768px-1024px
 * - iPad Pro: 1024px-1366px
 * - Desktop: 1367px+
 */

/* ==========================================================================
   CSS Custom Properties - Responsive Tokens
   ========================================================================== */

:root {
    /* Touch Target Sizes */
    --touch-target-min: 44px;
    --touch-target-comfortable: 48px;
    --touch-target-large: 56px;

    /* Spacing Scale */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;

    /* Typography Scale - Fluid */
    --font-size-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
    --font-size-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
    --font-size-base: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
    --font-size-lg: clamp(1.125rem, 1rem + 0.6vw, 1.25rem);
    --font-size-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
    --font-size-2xl: clamp(1.5rem, 1.25rem + 1.25vw, 2rem);
    --font-size-3xl: clamp(1.875rem, 1.5rem + 1.875vw, 2.5rem);
    --font-size-4xl: clamp(2.25rem, 1.75rem + 2.5vw, 3rem);

    /* Line Lengths */
    --line-length-min: 45ch;
    --line-length-optimal: 65ch;
    --line-length-max: 75ch;

    /* Layout */
    --sidebar-width: 280px;
    --sidebar-collapsed-width: 64px;
    --header-height: 64px;
    --bottom-nav-height: 64px;
    --safe-area-inset-bottom: env(safe-area-inset-bottom, 0px);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;

    /* Z-Index Scale */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-popover: 600;
    --z-tooltip: 700;
}

/* ==========================================================================
   Base Touch Optimizations
   ========================================================================== */

/* Ensure all interactive elements meet minimum touch target */
button,
[role="button"],
a,
input[type="submit"],
input[type="button"],
input[type="reset"],
select,
.ennu-touchable {
    min-height: var(--touch-target-min);
    min-width: var(--touch-target-min);
}

/* Touch action hints */
.ennu-swipeable {
    touch-action: pan-x;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x mandatory;
}

.ennu-swipeable > * {
    scroll-snap-align: start;
}

/* Prevent text selection on interactive elements */
.ennu-no-select {
    -webkit-user-select: none;
    user-select: none;
    -webkit-touch-callout: none;
}

/* Smooth scrolling for touch devices */
.ennu-scroll-container {
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
}

/* Remove tap highlight on iOS */
.ennu-no-tap-highlight {
    -webkit-tap-highlight-color: transparent;
}

/* ==========================================================================
   Typography - Fluid Scaling
   ========================================================================== */

html {
    font-size: 16px;
}

body {
    font-size: var(--font-size-base);
    line-height: 1.6;
}

/* Headings with fluid sizing */
.ennu-heading-1,
h1.ennu-heading {
    font-size: var(--font-size-4xl);
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.ennu-heading-2,
h2.ennu-heading {
    font-size: var(--font-size-3xl);
    line-height: 1.2;
    letter-spacing: -0.01em;
}

.ennu-heading-3,
h3.ennu-heading {
    font-size: var(--font-size-2xl);
    line-height: 1.25;
}

.ennu-heading-4,
h4.ennu-heading {
    font-size: var(--font-size-xl);
    line-height: 1.3;
}

/* Readable line lengths */
.ennu-prose {
    max-width: var(--line-length-optimal);
}

.ennu-prose-wide {
    max-width: var(--line-length-max);
}

/* ==========================================================================
   Grid System - Responsive
   ========================================================================== */

.ennu-grid {
    display: grid;
    gap: var(--spacing-lg);
}

/* Auto-fit grid for cards */
.ennu-grid-auto {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* Fixed column grids */
.ennu-grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

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

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

/* ==========================================================================
   Dashboard Layout
   ========================================================================== */

.ennu-dashboard {
    display: grid;
    grid-template-columns: var(--sidebar-width) 1fr;
    grid-template-rows: var(--header-height) 1fr;
    grid-template-areas:
        "sidebar header"
        "sidebar main";
    min-height: 100vh;
}

.ennu-dashboard-header {
    grid-area: header;
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background: #ffffff;
    border-bottom: 1px solid #e5e7eb;
}

.ennu-dashboard-sidebar {
    grid-area: sidebar;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    background: #1a1a2e;
    color: #ffffff;
}

.ennu-dashboard-main {
    grid-area: main;
    padding: var(--spacing-xl);
    overflow-x: hidden;
}

/* Dashboard Cards */
.ennu-dashboard-card {
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    padding: var(--spacing-lg);
    transition: box-shadow var(--transition-normal);
}

.ennu-dashboard-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* ==========================================================================
   Navigation Components
   ========================================================================== */

/* Desktop Navigation */
.ennu-nav-desktop {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.ennu-nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    min-height: var(--touch-target-min);
    border-radius: 8px;
    color: inherit;
    text-decoration: none;
    transition: background var(--transition-fast);
}

.ennu-nav-item:hover {
    background: rgba(0, 0, 0, 0.05);
}

.ennu-nav-item.active {
    background: rgba(37, 99, 235, 0.1);
    color: #2563eb;
}

/* Mobile Bottom Navigation */
.ennu-nav-bottom {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: calc(var(--bottom-nav-height) + var(--safe-area-inset-bottom));
    padding-bottom: var(--safe-area-inset-bottom);
    background: #ffffff;
    border-top: 1px solid #e5e7eb;
    z-index: var(--z-fixed);
}

.ennu-nav-bottom-items {
    display: flex;
    justify-content: space-around;
    align-items: center;
    height: var(--bottom-nav-height);
}

.ennu-nav-bottom-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    min-width: var(--touch-target-comfortable);
    min-height: var(--touch-target-comfortable);
    padding: var(--spacing-xs);
    color: #6b7280;
    text-decoration: none;
    font-size: var(--font-size-xs);
    transition: color var(--transition-fast);
}

.ennu-nav-bottom-item.active {
    color: #2563eb;
}

.ennu-nav-bottom-icon {
    width: 24px;
    height: 24px;
}

/* Hamburger Menu */
.ennu-hamburger {
    display: none;
    width: var(--touch-target-min);
    height: var(--touch-target-min);
    padding: 10px;
    background: transparent;
    border: none;
    cursor: pointer;
}

.ennu-hamburger-line {
    display: block;
    width: 24px;
    height: 2px;
    background: currentColor;
    margin: 5px 0;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.ennu-hamburger.open .ennu-hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.ennu-hamburger.open .ennu-hamburger-line:nth-child(2) {
    opacity: 0;
}

.ennu-hamburger.open .ennu-hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ==========================================================================
   Form Controls - Touch Optimized
   ========================================================================== */

.ennu-form-control {
    width: 100%;
    min-height: var(--touch-target-comfortable);
    padding: 12px 16px;
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: #1a1a1a;
    background: #ffffff;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    -webkit-appearance: none;
    appearance: none;
}

.ennu-form-control:focus {
    outline: none;
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Select with custom arrow */
.ennu-form-select {
    padding-right: 40px;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 12px center;
    background-repeat: no-repeat;
    background-size: 20px;
}

/* Checkbox and Radio - Larger for touch */
.ennu-checkbox,
.ennu-radio {
    width: 24px;
    height: 24px;
    margin: 0;
    cursor: pointer;
    accent-color: #2563eb;
}

.ennu-checkbox-label,
.ennu-radio-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    min-height: var(--touch-target-min);
    padding: var(--spacing-sm) 0;
    cursor: pointer;
}

/* Switch Toggle */
.ennu-switch {
    position: relative;
    display: inline-flex;
    width: 52px;
    height: 28px;
    cursor: pointer;
}

.ennu-switch-input {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

.ennu-switch-track {
    width: 100%;
    height: 100%;
    background: #d1d5db;
    border-radius: 14px;
    transition: background var(--transition-fast);
}

.ennu-switch-input:checked + .ennu-switch-track {
    background: #2563eb;
}

.ennu-switch-thumb {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 24px;
    height: 24px;
    background: #ffffff;
    border-radius: 50%;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
    transition: transform var(--transition-fast);
}

.ennu-switch-input:checked ~ .ennu-switch-thumb {
    transform: translateX(24px);
}

/* ==========================================================================
   Tables - Responsive
   ========================================================================== */

.ennu-table-wrapper {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.ennu-table {
    width: 100%;
    border-collapse: collapse;
}

.ennu-table th,
.ennu-table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid #e5e7eb;
}

.ennu-table th {
    font-weight: 600;
    background: #f9fafb;
    position: sticky;
    top: 0;
}

/* Card-style table for mobile */
.ennu-table-cards {
    display: none;
}

.ennu-table-card {
    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.ennu-table-card-row {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid #f3f4f6;
}

.ennu-table-card-row:last-child {
    border-bottom: none;
}

.ennu-table-card-label {
    font-weight: 500;
    color: #6b7280;
}

/* ==========================================================================
   Bottom Sheet / Slide-up Panel
   ========================================================================== */

.ennu-bottom-sheet {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    max-height: 90vh;
    background: #ffffff;
    border-radius: 16px 16px 0 0;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.15);
    transform: translateY(100%);
    transition: transform var(--transition-normal);
    z-index: var(--z-modal);
    overflow: hidden;
}

.ennu-bottom-sheet.open {
    transform: translateY(0);
}

.ennu-bottom-sheet-handle {
    display: flex;
    justify-content: center;
    padding: var(--spacing-md);
    cursor: grab;
}

.ennu-bottom-sheet-handle::before {
    content: '';
    width: 40px;
    height: 4px;
    background: #d1d5db;
    border-radius: 2px;
}

.ennu-bottom-sheet-content {
    max-height: calc(90vh - 40px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: 0 var(--spacing-lg) var(--spacing-lg);
}

/* Bottom sheet backdrop */
.ennu-bottom-sheet-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
    z-index: calc(var(--z-modal) - 1);
}

.ennu-bottom-sheet-backdrop.visible {
    opacity: 1;
    visibility: visible;
}

/* ==========================================================================
   Face Chart Specific Styles
   ========================================================================== */

.ennu-face-chart-container {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: var(--spacing-lg);
    height: calc(100vh - var(--header-height) - var(--spacing-xl) * 2);
}

.ennu-face-chart-canvas-area {
    position: relative;
    background: #f9fafb;
    border-radius: 12px;
    overflow: hidden;
}

.ennu-face-chart-canvas {
    width: 100%;
    height: 100%;
    touch-action: none;
}

/* Floating Toolbar */
.ennu-face-chart-toolbar {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: #ffffff;
    border-bottom: 1px solid #e5e7eb;
}

.ennu-face-chart-toolbar-floating {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    border: none;
    z-index: var(--z-dropdown);
}

.ennu-tool-button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: var(--touch-target-comfortable);
    height: var(--touch-target-comfortable);
    padding: 0;
    background: transparent;
    border: none;
    border-radius: 8px;
    color: #6b7280;
    cursor: pointer;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.ennu-tool-button:hover {
    background: #f3f4f6;
    color: #1a1a1a;
}

.ennu-tool-button.active {
    background: #eff6ff;
    color: #2563eb;
}

/* Product Grid */
.ennu-product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: var(--spacing-md);
}

.ennu-product-card {
    display: flex;
    flex-direction: column;
    padding: var(--spacing-md);
    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    cursor: pointer;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.ennu-product-card:hover {
    border-color: #2563eb;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.1);
}

.ennu-product-image {
    aspect-ratio: 1;
    object-fit: contain;
    margin-bottom: var(--spacing-sm);
}

.ennu-product-name {
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.ennu-product-price {
    font-size: var(--font-size-sm);
    color: #6b7280;
}

/* Order Summary Sidebar */
.ennu-order-summary {
    display: flex;
    flex-direction: column;
    height: 100%;
    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    overflow: hidden;
}

.ennu-order-summary-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid #e5e7eb;
}

.ennu-order-summary-items {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
}

.ennu-order-summary-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid #e5e7eb;
    background: #f9fafb;
}

/* ==========================================================================
   Collapsible Sections
   ========================================================================== */

.ennu-collapsible {
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    overflow: hidden;
}

.ennu-collapsible + .ennu-collapsible {
    margin-top: var(--spacing-md);
}

.ennu-collapsible-trigger {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    min-height: var(--touch-target-comfortable);
    padding: var(--spacing-md) var(--spacing-lg);
    background: #f9fafb;
    border: none;
    cursor: pointer;
    font-size: var(--font-size-base);
    font-weight: 500;
    text-align: left;
    transition: background var(--transition-fast);
}

.ennu-collapsible-trigger:hover {
    background: #f3f4f6;
}

.ennu-collapsible-icon {
    width: 20px;
    height: 20px;
    transition: transform var(--transition-fast);
}

.ennu-collapsible.open .ennu-collapsible-icon {
    transform: rotate(180deg);
}

.ennu-collapsible-content {
    display: none;
    padding: var(--spacing-lg);
}

.ennu-collapsible.open .ennu-collapsible-content {
    display: block;
}

/* ==========================================================================
   Buttons - Touch Optimized
   ========================================================================== */

.ennu-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    min-height: var(--touch-target-comfortable);
    padding: 12px 24px;
    font-size: var(--font-size-base);
    font-weight: 600;
    text-decoration: none;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
}

.ennu-btn-primary {
    color: #ffffff;
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
}

.ennu-btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.ennu-btn-primary:active {
    transform: translateY(0);
}

.ennu-btn-secondary {
    color: #374151;
    background: #f3f4f6;
}

.ennu-btn-secondary:hover {
    background: #e5e7eb;
}

.ennu-btn-outline {
    color: #2563eb;
    background: transparent;
    border: 2px solid #2563eb;
}

.ennu-btn-outline:hover {
    background: rgba(37, 99, 235, 0.05);
}

.ennu-btn-lg {
    min-height: var(--touch-target-large);
    padding: 16px 32px;
    font-size: var(--font-size-lg);
}

.ennu-btn-sm {
    min-height: var(--touch-target-min);
    padding: 8px 16px;
    font-size: var(--font-size-sm);
}

.ennu-btn-block {
    width: 100%;
}

/* Thumb-zone friendly CTA positioning */
.ennu-cta-bottom {
    position: fixed;
    bottom: var(--spacing-lg);
    left: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: var(--z-fixed);
}

/* ==========================================================================
   MOBILE BREAKPOINT (0 - 767px)
   ========================================================================== */

@media (max-width: 767px) {
    /* Root adjustments */
    :root {
        --spacing-lg: 20px;
        --spacing-xl: 24px;
        --header-height: 56px;
    }

    /* Dashboard becomes single column */
    .ennu-dashboard {
        grid-template-columns: 1fr;
        grid-template-rows: var(--header-height) 1fr;
        grid-template-areas:
            "header"
            "main";
        padding-bottom: calc(var(--bottom-nav-height) + var(--safe-area-inset-bottom));
    }

    .ennu-dashboard-sidebar {
        position: fixed;
        left: -100%;
        width: 85%;
        max-width: 320px;
        transition: left var(--transition-normal);
        z-index: var(--z-modal);
    }

    .ennu-dashboard-sidebar.open {
        left: 0;
    }

    .ennu-dashboard-main {
        padding: var(--spacing-md);
    }

    /* Show hamburger and bottom nav */
    .ennu-hamburger {
        display: block;
    }

    .ennu-nav-desktop {
        display: none;
    }

    .ennu-nav-bottom {
        display: block;
    }

    /* Grid adjustments */
    .ennu-grid-2,
    .ennu-grid-3,
    .ennu-grid-4 {
        grid-template-columns: 1fr;
    }

    .ennu-grid-auto {
        grid-template-columns: 1fr;
    }

    /* Tables become cards */
    .ennu-table-wrapper {
        display: none;
    }

    .ennu-table-cards {
        display: block;
    }

    /* Face Chart adjustments */
    .ennu-face-chart-container {
        grid-template-columns: 1fr;
        height: auto;
    }

    .ennu-face-chart-canvas-area {
        height: 60vh;
        min-height: 400px;
    }

    .ennu-face-chart-toolbar {
        display: none;
    }

    .ennu-face-chart-toolbar-floating {
        display: flex;
    }

    .ennu-order-summary {
        display: none;
    }

    /* Order summary becomes bottom sheet on mobile */
    .ennu-order-summary-mobile {
        display: block;
    }

    /* Product grid - 2 columns */
    .ennu-product-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }

    /* Buttons stack on mobile */
    .ennu-btn-group {
        flex-direction: column;
    }

    .ennu-btn-group .ennu-btn {
        width: 100%;
    }

    /* Thumb zone CTA */
    .ennu-cta-bottom {
        bottom: calc(var(--bottom-nav-height) + var(--safe-area-inset-bottom) + var(--spacing-md));
    }

    /* Modal adjustments */
    .ennu-modal {
        margin: var(--spacing-md);
        max-height: calc(100vh - var(--spacing-xl) * 2);
    }

    /* Form layout */
    .ennu-form-row {
        flex-direction: column;
    }

    .ennu-form-row > * {
        width: 100%;
    }
}

/* ==========================================================================
   TABLET / iPad BREAKPOINT (768px - 1024px)
   ========================================================================== */

@media (min-width: 768px) and (max-width: 1024px) {
    /* Larger touch targets for iPad */
    :root {
        --touch-target-min: 48px;
        --touch-target-comfortable: 52px;
    }

    /* Larger fonts for arm's length reading */
    html {
        font-size: 17px;
    }

    /* Dashboard with collapsible sidebar */
    .ennu-dashboard {
        grid-template-columns: var(--sidebar-collapsed-width) 1fr;
    }

    .ennu-dashboard.sidebar-expanded {
        grid-template-columns: var(--sidebar-width) 1fr;
    }

    .ennu-dashboard-sidebar {
        width: var(--sidebar-collapsed-width);
        transition: width var(--transition-normal);
    }

    .ennu-dashboard.sidebar-expanded .ennu-dashboard-sidebar {
        width: var(--sidebar-width);
    }

    /* Sidebar items - icon only when collapsed */
    .ennu-sidebar-text {
        display: none;
    }

    .ennu-dashboard.sidebar-expanded .ennu-sidebar-text {
        display: inline;
    }

    /* Grid - 2 columns */
    .ennu-grid-3,
    .ennu-grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    /* Face Chart - side by side but narrower sidebar */
    .ennu-face-chart-container {
        grid-template-columns: 1fr 280px;
    }

    /* Product grid - 3 columns */
    .ennu-product-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    /* Hide bottom nav, show hamburger */
    .ennu-nav-bottom {
        display: none;
    }

    .ennu-hamburger {
        display: block;
    }

    /* Form controls - larger */
    .ennu-form-control {
        padding: 14px 18px;
    }
}

/* iPad Portrait */
@media (min-width: 768px) and (max-width: 1024px) and (orientation: portrait) {
    .ennu-face-chart-container {
        grid-template-columns: 1fr;
        grid-template-rows: 1fr auto;
    }

    .ennu-face-chart-canvas-area {
        height: 55vh;
    }

    .ennu-order-summary {
        max-height: 40vh;
    }
}

/* iPad Landscape */
@media (min-width: 768px) and (max-width: 1024px) and (orientation: landscape) {
    .ennu-face-chart-container {
        grid-template-columns: 1fr 300px;
    }
}

/* ==========================================================================
   iPad PRO BREAKPOINT (1024px - 1366px)
   ========================================================================== */

@media (min-width: 1024px) and (max-width: 1366px) {
    /* Slightly larger fonts */
    html {
        font-size: 17px;
    }

    /* Full sidebar */
    .ennu-dashboard {
        grid-template-columns: var(--sidebar-width) 1fr;
    }

    .ennu-dashboard-sidebar {
        width: var(--sidebar-width);
    }

    .ennu-sidebar-text {
        display: inline;
    }

    /* Hide hamburger, show nav */
    .ennu-hamburger {
        display: none;
    }

    .ennu-nav-desktop {
        display: flex;
    }

    /* Grid - 3 columns */
    .ennu-grid-4 {
        grid-template-columns: repeat(3, 1fr);
    }

    /* Face Chart - wider sidebar */
    .ennu-face-chart-container {
        grid-template-columns: 1fr 340px;
    }

    /* Product grid - 4 columns */
    .ennu-product-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* iPad Pro Portrait */
@media (min-width: 1024px) and (max-width: 1366px) and (orientation: portrait) {
    .ennu-face-chart-container {
        grid-template-columns: 1fr 320px;
    }
}

/* iPad Pro Landscape */
@media (min-width: 1024px) and (max-width: 1366px) and (orientation: landscape) {
    .ennu-face-chart-container {
        grid-template-columns: 1fr 380px;
    }

    .ennu-product-grid {
        grid-template-columns: repeat(5, 1fr);
    }
}

/* ==========================================================================
   DESKTOP BREAKPOINT (1367px+)
   ========================================================================== */

@media (min-width: 1367px) {
    /* Standard font size */
    html {
        font-size: 16px;
    }

    /* Full layout */
    .ennu-dashboard {
        grid-template-columns: var(--sidebar-width) 1fr;
    }

    /* All navigation visible */
    .ennu-hamburger {
        display: none;
    }

    .ennu-nav-desktop {
        display: flex;
    }

    .ennu-nav-bottom {
        display: none;
    }

    /* Full grid columns */
    .ennu-grid-2 {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

    /* Face Chart - full width sidebar */
    .ennu-face-chart-container {
        grid-template-columns: 1fr 400px;
    }

    /* Product grid - full */
    .ennu-product-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    }

    /* Tables stay as tables */
    .ennu-table-wrapper {
        display: block;
    }

    .ennu-table-cards {
        display: none;
    }
}

/* ==========================================================================
   iPad-Specific Features
   ========================================================================== */

/* iPadOS Split View Support */
@media (min-width: 320px) and (max-width: 640px) and (hover: none) and (pointer: coarse) {
    /* Compact mode for split view */
    .ennu-dashboard {
        grid-template-columns: 1fr;
    }

    .ennu-dashboard-sidebar {
        display: none;
    }

    .ennu-face-chart-container {
        grid-template-columns: 1fr;
    }

    .ennu-order-summary {
        display: none;
    }

    .ennu-order-summary-mobile {
        display: block;
    }
}

/* Detect touch devices without hover */
@media (hover: none) and (pointer: coarse) {
    /* Disable hover states that don't work well with touch */
    .ennu-btn-primary:hover {
        transform: none;
        box-shadow: none;
    }

    /* Use active states instead */
    .ennu-btn-primary:active {
        transform: scale(0.98);
        box-shadow: 0 2px 8px rgba(37, 99, 235, 0.2);
    }

    .ennu-nav-item:hover {
        background: transparent;
    }

    .ennu-nav-item:active {
        background: rgba(0, 0, 0, 0.05);
    }

    .ennu-product-card:hover {
        border-color: #e5e7eb;
        box-shadow: none;
    }

    .ennu-product-card:active {
        border-color: #2563eb;
        background: #f0f7ff;
    }

    /* Larger targets on touch */
    .ennu-collapsible-trigger {
        min-height: var(--touch-target-comfortable);
    }
}

/* High-resolution iPad displays */
@media (-webkit-min-device-pixel-ratio: 2) and (pointer: coarse),
       (min-resolution: 192dpi) and (pointer: coarse) {
    /* Sharper borders */
    .ennu-dashboard-card,
    .ennu-form-control,
    .ennu-product-card {
        border-width: 0.5px;
    }
}

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

    .ennu-bottom-sheet {
        transition: none;
    }
}

/* ==========================================================================
   Safe Area Insets (Notch/Home Indicator)
   ========================================================================== */

@supports (padding: max(0px)) {
    .ennu-nav-bottom {
        padding-bottom: max(var(--spacing-xs), env(safe-area-inset-bottom));
    }

    .ennu-bottom-sheet-content {
        padding-bottom: max(var(--spacing-lg), env(safe-area-inset-bottom));
    }

    .ennu-cta-bottom {
        bottom: max(var(--spacing-lg), calc(env(safe-area-inset-bottom) + var(--spacing-md)));
    }

    /* Side insets for landscape */
    .ennu-dashboard-main {
        padding-left: max(var(--spacing-xl), env(safe-area-inset-left));
        padding-right: max(var(--spacing-xl), env(safe-area-inset-right));
    }
}

/* ==========================================================================
   Dark Mode Support
   ========================================================================== */

@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #0f172a;
        --color-surface: #1e293b;
        --color-border: #334155;
        --color-text: #f1f5f9;
        --color-text-muted: #94a3b8;
    }

    .ennu-dashboard {
        background: var(--color-bg);
    }

    .ennu-dashboard-header {
        background: var(--color-surface);
        border-color: var(--color-border);
    }

    .ennu-dashboard-card {
        background: var(--color-surface);
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    }

    .ennu-form-control {
        color: var(--color-text);
        background: var(--color-surface);
        border-color: var(--color-border);
    }

    .ennu-form-control:focus {
        border-color: #3b82f6;
        box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
    }

    .ennu-nav-bottom {
        background: var(--color-surface);
        border-color: var(--color-border);
    }

    .ennu-nav-bottom-item {
        color: var(--color-text-muted);
    }

    .ennu-bottom-sheet {
        background: var(--color-surface);
    }

    .ennu-bottom-sheet-handle::before {
        background: var(--color-border);
    }

    .ennu-table th {
        background: var(--color-surface);
    }

    .ennu-table th,
    .ennu-table td {
        border-color: var(--color-border);
    }

    .ennu-table-card {
        background: var(--color-surface);
        border-color: var(--color-border);
    }

    .ennu-collapsible {
        border-color: var(--color-border);
    }

    .ennu-collapsible-trigger {
        background: var(--color-surface);
        color: var(--color-text);
    }

    .ennu-product-card {
        background: var(--color-surface);
        border-color: var(--color-border);
    }

    .ennu-order-summary {
        background: var(--color-surface);
        border-color: var(--color-border);
    }

    .ennu-order-summary-footer {
        background: rgba(0, 0, 0, 0.2);
    }

    .ennu-btn-secondary {
        color: var(--color-text);
        background: var(--color-surface);
    }

    .ennu-btn-secondary:hover {
        background: #334155;
    }

    .ennu-face-chart-canvas-area {
        background: var(--color-surface);
    }

    .ennu-face-chart-toolbar-floating {
        background: var(--color-surface);
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    }

    .ennu-switch-track {
        background: var(--color-border);
    }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */

@media print {
    .ennu-dashboard {
        display: block;
    }

    .ennu-dashboard-sidebar,
    .ennu-dashboard-header,
    .ennu-nav-bottom,
    .ennu-hamburger,
    .ennu-bottom-sheet,
    .ennu-cta-bottom {
        display: none !important;
    }

    .ennu-dashboard-main {
        padding: 0;
    }

    .ennu-dashboard-card {
        box-shadow: none;
        border: 1px solid #e5e7eb;
        page-break-inside: avoid;
    }

    .ennu-table-wrapper {
        display: block;
        overflow: visible;
    }

    .ennu-table-cards {
        display: none;
    }

    .ennu-btn {
        display: none;
    }
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

/* Visibility */
.ennu-hide-mobile {
    display: block;
}

.ennu-show-mobile {
    display: none;
}

.ennu-hide-tablet {
    display: block;
}

.ennu-show-tablet {
    display: none;
}

@media (max-width: 767px) {
    .ennu-hide-mobile {
        display: none !important;
    }

    .ennu-show-mobile {
        display: block !important;
    }
}

@media (min-width: 768px) and (max-width: 1024px) {
    .ennu-hide-tablet {
        display: none !important;
    }

    .ennu-show-tablet {
        display: block !important;
    }
}

/* Spacing utilities */
.ennu-mt-auto { margin-top: auto; }
.ennu-mb-auto { margin-bottom: auto; }
.ennu-ml-auto { margin-left: auto; }
.ennu-mr-auto { margin-right: auto; }
.ennu-mx-auto { margin-left: auto; margin-right: auto; }

/* Text alignment responsive */
.ennu-text-center { text-align: center; }
.ennu-text-left { text-align: left; }
.ennu-text-right { text-align: right; }

@media (max-width: 767px) {
    .ennu-text-center-mobile { text-align: center; }
}

/* Flex utilities */
.ennu-flex { display: flex; }
.ennu-flex-col { flex-direction: column; }
.ennu-flex-wrap { flex-wrap: wrap; }
.ennu-items-center { align-items: center; }
.ennu-justify-center { justify-content: center; }
.ennu-justify-between { justify-content: space-between; }
.ennu-gap-sm { gap: var(--spacing-sm); }
.ennu-gap-md { gap: var(--spacing-md); }
.ennu-gap-lg { gap: var(--spacing-lg); }

/* Width utilities */
.ennu-w-full { width: 100%; }
.ennu-max-w-prose { max-width: var(--line-length-optimal); }

/* Truncation */
.ennu-truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ennu-line-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.ennu-line-clamp-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}