/* CSS Variables matching Showroom Kiosk */
:root {
    --mql-navy: #0a2540;
    --mql-navy-2: #14467c;
    --mql-blue: #2b7de9;
    --mql-blue-dark: #1b5cb8;
    --mql-green: #28a745;
    --mql-purple: #6f42c1;
    --mql-orange: #fd7e14;
    --mql-red: #dc3545;
    --mql-white: #ffffff;
    --mql-gray-100: #f8f9fa;
    --mql-gray-200: #e9ecef;
    --mql-gray-300: #dee2e6;
    --mql-gray-600: #6c757d;
    --mql-gray-800: #343a40;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.6s cubic-bezier(0.22, 0.9, 0.3, 1);
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 12px 40px rgba(0, 0, 0, 0.3);
    
    /* Spacing */
    --space-xs: 0.5vmin;
    --space-sm: 1vmin;
    --space-md: 2vmin;
    --space-lg: 3vmin;
    --space-xl: 4vmin;
    --space-2xl: 6vmin;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html, body {
    height: 100%;
    width: 100%;
    overflow: hidden;
    font-family: Arial, Helvetica, sans-serif;
    background: var(--mql-gray-100);
    color: var(--mql-gray-800);
    touch-action: manipulation;
}

/* App Container */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    width: 100vw;
    position: relative;
}

/* Header */
.app-header {
    background: var(--mql-navy);
    color: var(--mql-white);
    padding: var(--space-md) var(--space-lg);
    box-shadow: var(--shadow-md);
    z-index: 100;
}

.header-content {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    max-width: 1400px;
    margin: 0 auto;
}

.header-logo {
    height: 6vmin;
    width: auto;
    object-fit: contain;
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.2));
}

.header-title {
    font-size: 3vmin;
    font-weight: 700;
    flex: 1;
}

.attract-btn {
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: var(--mql-white);
    font-size: 2.5vmin;
    padding: var(--space-sm) var(--space-md);
    border-radius: 999px;
    cursor: pointer;
    transition: background var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.attract-btn:hover,
.attract-btn:active {
    background: rgba(255, 255, 255, 0.2);
}

/* Breadcrumb */
.breadcrumb {
    background: var(--mql-white);
    padding: var(--space-sm) var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    box-shadow: var(--shadow-sm);
    overflow-x: auto;
    white-space: nowrap;
}

.breadcrumb-item {
    background: none;
    border: none;
    color: var(--mql-blue);
    font-size: 1.8vmin;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-sm);
    border-radius: 4px;
    transition: all var(--transition-fast);
}

.breadcrumb-item:hover {
    background: var(--mql-gray-100);
}

.breadcrumb-item:not(:last-child)::after {
    content: "›";
    margin-left: var(--space-sm);
    color: var(--mql-gray-600);
}

.breadcrumb-item.active {
    color: var(--mql-gray-800);
    font-weight: 600;
}

/* Main Content */
.main-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-lg);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(30vmin, 1fr));
    gap: var(--space-lg);
    align-content: start;
}

/* Category Cards */
.category-card {
    background: var(--mql-white);
    border-radius: 2vmin;
    padding: var(--space-xl);
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
    text-align: center;
}

.category-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1vmin;
    background: var(--category-color, var(--mql-blue));
}

.category-card:hover {
    transform: translateY(-0.5vmin);
    box-shadow: var(--shadow-lg);
}

.category-card:active {
    transform: translateY(0);
}

.category-icon {
    width: 8vmin;
    height: 8vmin;
    border-radius: 50%;
    background: var(--category-color, var(--mql-blue));
    color: var(--mql-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4vmin;
}

.category-name {
    font-size: 3vmin;
    font-weight: 700;
    color: var(--mql-gray-800);
}

.category-count {
    font-size: 1.8vmin;
    color: var(--mql-gray-600);
    background: var(--mql-gray-100);
    padding: var(--space-xs) var(--space-sm);
    border-radius: 999px;
}

/* Item Cards */
.item-card {
    background: var(--mql-white);
    border-radius: 1.5vmin;
    padding: var(--space-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
    border: 2px solid transparent;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.item-card:hover {
    border-color: var(--mql-blue);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.item-card:active {
    transform: translateY(0);
}

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

.item-icon {
    width: 5vmin;
    height: 5vmin;
    border-radius: 8px;
    background: var(--mql-gray-100);
    color: var(--mql-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5vmin;
    flex-shrink: 0;
}

.item-title {
    font-size: 2.2vmin;
    font-weight: 600;
    color: var(--mql-gray-800);
    flex: 1;
}

.item-description {
    font-size: 1.6vmin;
    color: var(--mql-gray-600);
    line-height: 1.4;
}

.item-methods {
    display: flex;
    gap: var(--space-xs);
    flex-wrap: wrap;
    margin-top: var(--space-sm);
}

.method-badge {
    font-size: 1.4vmin;
    padding: 0.3vmin 0.8vmin;
    border-radius: 4px;
    background: var(--mql-gray-100);
    color: var(--mql-gray-600);
    display: flex;
    align-items: center;
    gap: 0.3vmin;
}

.method-badge.offline {
    background: #e8f5e9;
    color: #2e7d32;
}

.method-badge.online {
    background: #e3f2fd;
    color: #1565c0;
}

/* Demo Modal */
.demo-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
}

.demo-modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    animation: fadeIn var(--transition-base);
}

.modal-content {
    position: relative;
    background: var(--mql-white);
    border-radius: 2vmin;
    width: 90%;
    max-width: 80vmin;
    max-height: 90vh;
    overflow: hidden;
    animation: slideUp var(--transition-base);
    box-shadow: var(--shadow-xl);
}

.modal-close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    background: var(--mql-gray-100);
    border: none;
    width: 5vmin;
    height: 5vmin;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 2.5vmin;
    color: var(--mql-gray-600);
    transition: all var(--transition-fast);
    z-index: 10;
}

.modal-close:hover {
    background: var(--mql-gray-200);
    color: var(--mql-gray-800);
}

.modal-body {
    padding: var(--space-2xl);
    overflow-y: auto;
    max-height: 90vh;
}

.demo-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.demo-icon {
    width: 8vmin;
    height: 8vmin;
    border-radius: 1.5vmin;
    background: var(--demo-color, var(--mql-blue));
    color: var(--mql-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4vmin;
    flex-shrink: 0;
}

.demo-title-section {
    flex: 1;
}

.demo-title {
    font-size: 3.5vmin;
    font-weight: 700;
    color: var(--mql-gray-800);
    margin-bottom: var(--space-xs);
}

.demo-category {
    font-size: 1.8vmin;
    color: var(--mql-gray-600);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.demo-description {
    font-size: 2vmin;
    line-height: 1.6;
    color: var(--mql-gray-600);
    margin-bottom: var(--space-xl);
}

.demo-methods {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.method-card {
    background: var(--mql-gray-100);
    border: 2px solid var(--mql-gray-200);
    border-radius: 1.5vmin;
    padding: var(--space-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.method-card:hover {
    border-color: var(--mql-blue);
    background: var(--mql-white);
    transform: translateX(0.5vmin);
}

.method-icon {
    width: 6vmin;
    height: 6vmin;
    border-radius: 1vmin;
    background: var(--mql-blue);
    color: var(--mql-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3vmin;
    flex-shrink: 0;
}

.method-info {
    flex: 1;
}

.method-platform {
    font-size: 2.2vmin;
    font-weight: 600;
    color: var(--mql-gray-800);
    margin-bottom: 0.3vmin;
}

.method-description {
    font-size: 1.6vmin;
    color: var(--mql-gray-600);
}

.method-badge-status {
    font-size: 1.4vmin;
    padding: 0.3vmin 0.8vmin;
    border-radius: 4px;
    display: inline-flex;
    align-items: center;
    gap: 0.3vmin;
}

.method-badge-status.online {
    background: #e3f2fd;
    color: #1565c0;
}

.method-badge-status.offline {
    background: #e8f5e9;
    color: #2e7d32;
}

.method-arrow {
    font-size: 2.5vmin;
    color: var(--mql-gray-400);
    transition: transform var(--transition-fast);
}

.method-card:hover .method-arrow {
    transform: translateX(0.5vmin);
    color: var(--mql-blue);
}

/* Offline Indicator */
.offline-indicator {
    position: fixed;
    bottom: var(--space-lg);
    right: var(--space-lg);
    background: var(--mql-orange);
    color: var(--mql-white);
    padding: var(--space-sm) var(--space-md);
    border-radius: 999px;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 1.6vmin;
    font-weight: 600;
    box-shadow: var(--shadow-lg);
    z-index: 500;
    animation: slideUp var(--transition-base);
}

/* QR Modal */
.qr-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1001;
}

.qr-modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.qr-modal .modal-content {
    max-width: 50vmin;
    text-align: center;
}

.qr-modal h2 {
    font-size: 2.5vmin;
    margin-bottom: var(--space-lg);
    color: var(--mql-gray-800);
}

#qrCode {
    display: flex;
    justify-content: center;
    margin-bottom: var(--space-lg);
}

#qrCode canvas {
    border-radius: 1vmin;
    box-shadow: var(--shadow-md);
}

.qr-url {
    font-size: 1.6vmin;
    color: var(--mql-gray-600);
    word-break: break-all;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(3vmin);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.05);
        opacity: 0.8;
    }
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.hidden {
    display: none !important;
}

.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 20vmin;
}

.loading-spinner {
    width: 6vmin;
    height: 6vmin;
    border: 0.7vmin solid rgba(22, 40, 76, 0.15);
    border-top-color: var(--mql-blue);
    border-radius: 50%;
    animation: spin 0.9s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}