/* ============================================
   CSS Variables & Base Styles
   ============================================ */
:root {
    /* Colors - Dark Theme with Warm Accents */
    --bg-primary: #0f0f0f;
    --bg-secondary: #1a1a1a;
    --bg-card: #222222;
    --bg-card-hover: #2a2a2a;
    
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;
    
    --accent-primary: #ff6b35;
    --accent-secondary: #f7c35f;
    --accent-gradient: linear-gradient(135deg, #ff6b35 0%, #f7c35f 100%);
    
    --success: #4ade80;
    --warning: #fbbf24;
    --error: #ef4444;
    
    /* Spacing */
    --header-height: 70px;
    --nav-height: 60px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 50%;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(255, 107, 53, 0.3);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ============================================
   Header
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(15, 15, 15, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    z-index: 100;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-icon {
    font-size: 1.8rem;
}

.logo-text {
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem;
    font-weight: 600;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.table-badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--bg-secondary);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
    font-weight: 500;
}

.table-icon {
    font-size: 1rem;
}

/* ============================================
   Category Navigation
   ============================================ */
.category-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 0 var(--spacing-lg);
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    z-index: 99;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.category-nav::-webkit-scrollbar {
    display: none;
}

.category-btn {
    flex-shrink: 0;
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-lg);
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    white-space: nowrap;
}

.category-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.category-btn.active {
    background: var(--accent-gradient);
    color: white;
    box-shadow: var(--shadow-glow);
}

/* ============================================
   Menu Container
   ============================================ */
.menu-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: calc(var(--header-height) + var(--nav-height) + var(--spacing-lg)) var(--spacing-lg) 100px;
}

.menu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

/* ============================================
   Menu Card
   ============================================ */
.menu-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.menu-card:hover {
    transform: translateY(-4px);
    background: var(--bg-card-hover);
    box-shadow: var(--shadow-md);
    border-color: rgba(255, 107, 53, 0.3);
}

.menu-card-image {
    width: 100%;
    height: 180px;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.menu-card:hover .menu-card-image {
    transform: scale(1.05);
}

.menu-card-image-container {
    overflow: hidden;
    position: relative;
}

.menu-card-category {
    position: absolute;
    top: var(--spacing-sm);
    left: var(--spacing-sm);
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    padding: 4px 10px;
    border-radius: var(--radius-lg);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--accent-secondary);
}

.menu-card-content {
    padding: var(--spacing-md);
}

.menu-card-name {
    font-family: 'Playfair Display', serif;
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.menu-card-description {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.menu-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.menu-card-price {
    font-size: 1.3rem;
    font-weight: 600;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.add-to-cart-btn {
    width: 42px;
    height: 42px;
    border: none;
    border-radius: var(--radius-full);
    background: var(--accent-gradient);
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.add-to-cart-btn:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-glow);
}

.add-to-cart-btn:active {
    transform: scale(0.95);
}

/* ============================================
   Cart FAB (Floating Action Button)
   ============================================ */
.cart-fab {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    width: 64px;
    height: 64px;
    border: none;
    border-radius: var(--radius-full);
    background: var(--accent-gradient);
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    transition: all var(--transition-normal);
    z-index: 90;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cart-fab:hover {
    transform: scale(1.1);
}

.cart-fab:active {
    transform: scale(0.95);
}

.cart-count {
    position: absolute;
    top: -4px;
    right: -4px;
    min-width: 24px;
    height: 24px;
    background: var(--error);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 6px;
    box-shadow: var(--shadow-sm);
}

.cart-count.hidden {
    display: none;
}

/* ============================================
   Cart Sidebar
   ============================================ */
.cart-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 200;
    opacity: 1;
    transition: opacity var(--transition-normal);
}

.cart-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.cart-sidebar {
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    max-width: 420px;
    height: 100%;
    background: var(--bg-secondary);
    z-index: 201;
    display: flex;
    flex-direction: column;
    transform: translateX(0);
    transition: transform var(--transition-normal);
    box-shadow: var(--shadow-lg);
}

.cart-sidebar.hidden {
    transform: translateX(100%);
}

.cart-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.cart-header h2 {
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem;
}

.cart-close {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.cart-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

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

.cart-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.cart-item-image {
    width: 70px;
    height: 70px;
    border-radius: var(--radius-sm);
    object-fit: cover;
}

.cart-item-details {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.cart-item-name {
    font-weight: 500;
    font-size: 0.95rem;
    margin-bottom: 4px;
}

.cart-item-price {
    color: var(--accent-primary);
    font-weight: 600;
    font-size: 0.9rem;
}

.cart-item-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: auto;
}

.quantity-btn {
    width: 28px;
    height: 28px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-primary);
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.quantity-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-primary);
}

.cart-item-quantity {
    font-weight: 500;
    min-width: 24px;
    text-align: center;
}

.cart-item-remove {
    margin-left: auto;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 4px;
    transition: color var(--transition-fast);
}

.cart-item-remove:hover {
    color: var(--error);
}

.cart-empty {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    padding: var(--spacing-xl);
}

.cart-empty.hidden {
    display: none;
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

.empty-hint {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.cart-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    background: var(--bg-primary);
}

.cart-total {
    display: flex;
    justify-content: space-between;
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.cart-total span:last-child {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.btn-send {
    width: 100%;
    background: var(--accent-gradient);
    color: white;
    padding: var(--spacing-md);
    font-size: 1.1rem;
}

.btn-send:hover {
    box-shadow: var(--shadow-glow);
}

.btn-send:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-icon {
    font-size: 1.2rem;
}

/* ============================================
   Modal
   ============================================ */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 300;
    padding: var(--spacing-lg);
    opacity: 1;
    transition: opacity var(--transition-normal);
}

.modal-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    max-width: 400px;
    width: 100%;
    text-align: center;
    transform: scale(1);
    transition: transform var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.modal-overlay.hidden .modal {
    transform: scale(0.9);
}

.modal-success .success-icon,
.modal-warning .warning-icon {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    margin: 0 auto var(--spacing-lg);
}

.modal-success .success-icon {
    background: var(--success);
    color: white;
}

.modal-warning .warning-icon {
    background: var(--warning);
    font-size: 3rem;
}

.modal h2 {
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.modal p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.order-number {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent-primary) !important;
    margin-bottom: var(--spacing-lg) !important;
}

.hint {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-family: monospace;
    background: var(--bg-primary);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    margin-top: var(--spacing-md);
}

/* ============================================
   Loading State
   ============================================ */
.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
}

.loading.hidden {
    display: none;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--accent-primary);
    border-radius: var(--radius-full);
    animation: spin 1s linear infinite;
    margin-bottom: var(--spacing-md);
}

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

.error-state {
    text-align: center;
    padding: var(--spacing-xl);
}

.error-state.hidden {
    display: none;
}

.error-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.error-state h2 {
    margin-bottom: var(--spacing-sm);
}

.error-state p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* ============================================
   Utilities
   ============================================ */
.hidden {
    display: none !important;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
    .header-content {
        padding: 0 var(--spacing-md);
    }
    
    .logo-text {
        font-size: 1.2rem;
    }
    
    .category-nav {
        padding: 0 var(--spacing-md);
    }
    
    .menu-container {
        padding-left: var(--spacing-md);
        padding-right: var(--spacing-md);
    }
    
    .menu-grid {
        grid-template-columns: 1fr;
    }
    
    .cart-fab {
        right: var(--spacing-md);
        bottom: var(--spacing-md);
    }
    
    .cart-sidebar {
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .table-badge {
        font-size: 0.8rem;
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .category-btn {
        padding: var(--spacing-xs) var(--spacing-md);
        font-size: 0.85rem;
    }
}