/**
 * RUIYI Retail POS - Main CSS
 * Additional styles for the POS system
 * Version: 1.0.2-optimized
 */

/* =================================
   CSS VARIABLES
   ================================= */
:root {
    --primary-color: #3B82F6;
    --secondary-color: #6B7280;
    --success-color: #10B981;
    --warning-color: #F59E0B;
    --danger-color: #EF4444;
    --text-primary: #1F2937;
    --text-secondary: #6B7280;
    --border: #E5E7EB;
    --background: #F9FAFB;
    --white: #FFFFFF;
    --shadow: rgba(0, 0, 0, 0.1);
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --transition: all 0.3s ease;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
}

/* =================================
   BASE STYLES
   ================================= */
.pos-wrapper {
    min-height: 100vh;
    background: var(--background);
}

.pos-main {
    padding: 0;
    max-width: 100%;
    margin: 0;
    width: 100%;
}

.pos-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.pos-user-info {
    display: flex;
    align-items: center;
    color: var(--text-secondary);
}

/* =================================
   CHECKOUT STYLES
   ================================= */
.pos-checkout-container {
    display: flex;
    gap: 2rem;
    height: calc(100vh - 200px);
}

.products-section {
    flex: 2;
    background: var(--white);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 1px 3px var(--shadow);
    overflow-y: auto;
}

.cart-section {
    flex: 1;
    background: var(--white);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 1px 3px var(--shadow);
    display: flex;
    flex-direction: column;
    height: fit-content;
    max-height: 100%;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.product-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    will-change: transform, box-shadow;
}

.product-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow);
    border-color: var(--primary-color);
}

.product-image {
    width: 100%;
    height: 120px;
    object-fit: cover;
    border-radius: calc(var(--border-radius) - 2px);
    margin-bottom: var(--spacing-sm);
}

.product-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-sm);
}

.product-price {
    color: var(--success-color);
    font-weight: 700;
    font-size: var(--font-size-base);
}

.cart-header {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border);
}

.cart-items {
    flex: 1;
    min-height: 200px;
    max-height: 400px;
    overflow-y: auto;
    margin-bottom: var(--spacing-md);
}

.cart-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--border);
}

.cart-item:last-child {
    border-bottom: none;
}

.item-info {
    flex: 1;
}

.item-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.item-price {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.quantity-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.quantity-btn {
    width: 30px;
    height: 30px;
    border: 1px solid var(--border);
    background: var(--white);
    border-radius: var(--border-radius);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    transition: var(--transition);
}

.quantity-btn:hover {
    background: var(--background);
}

.quantity-input {
    width: 50px;
    text-align: center;
    padding: var(--spacing-xs);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
}

.item-total {
    font-weight: 700;
    color: var(--text-primary);
    min-width: 80px;
    text-align: right;
}

.cart-total {
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

.checkout-button {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--success-color);
    color: var(--white);
    border: none;
    border-radius: var(--border-radius);
    font-size: var(--font-size-lg);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.checkout-button:hover:not(:disabled) {
    background: #059669;
    transform: translateY(-1px);
}

.checkout-button:disabled {
    background: var(--text-secondary);
    cursor: not-allowed;
    opacity: 0.6;
    transform: none;
}

.empty-cart {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
}

/* =================================
   DASHBOARD STYLES
   ================================= */
.dashboard-container {
    background: var(--white);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 1px 3px var(--shadow);
    margin: 1rem;
    max-width: calc(100% - 2rem);
}

.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 1px 3px var(--shadow);
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow);
}

.stat-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.stat-subtitle {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.quick-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
}

.action-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    color: inherit;
}

.action-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow);
    border-color: var(--primary-color);
}

.action-icon {
    width: 60px;
    height: 60px;
    background: var(--background);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.action-content h3 {
    margin: 0 0 0.25rem 0;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.action-content p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* =================================
   SEARCH & FORMS
   ================================= */
.search-section input {
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.search-section input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* =================================
   NOTIFICATIONS
   ================================= */
.pos-notification {
    position: fixed;
    bottom: 1rem;
    left: 1rem;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem 1.5rem;
    box-shadow: 0 4px 12px var(--shadow);
    max-width: 300px;
    z-index: 1000;
    animation: slideInLeft 0.3s ease;
}

.pos-notification.success {
    border-left: 4px solid var(--success-color);
}

.pos-notification.error {
    border-left: 4px solid var(--danger-color);
}

.pos-notification.warning {
    border-left: 4px solid var(--warning-color);
}

.pos-notification.info {
    border-left: 4px solid var(--primary-color);
}

.notification-title {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.notification-message {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.notification-close {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.25rem;
    color: var(--text-secondary);
}

/* =================================
   ANIMATIONS
   ================================= */
@keyframes slideInLeft {
    from {
        transform: translateX(-100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

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

/* =================================
   RESPONSIVE DESIGN
   ================================= */
@media (max-width: 768px) {
    .pos-main {
        padding: 0;
    }
    
    .dashboard-container {
        margin: 0.5rem;
        padding: 1rem;
        max-width: calc(100% - 1rem);
    }
    
    .pos-checkout-container {
        flex-direction: column;
        height: auto;
        gap: 1rem;
    }
    
    .products-section,
    .cart-section {
        flex: none;
    }
    
    .product-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
    
    .dashboard-stats {
        grid-template-columns: 1fr;
    }
    
    .quick-actions {
        grid-template-columns: 1fr;
    }
    
    .dashboard-stats-row {
        flex-direction: column !important;
        gap: 1rem !important;
    }
    
    .quick-actions-grid {
        flex-direction: column !important;
        gap: 1rem !important;
    }
}

/* =================================
   PERFORMANCE OPTIMIZATIONS
   ================================= */
.pos-container {
    contain: layout style;
}

.product-grid {
    contain: layout;
}

.cart-section {
    contain: layout style;
}

/* Hardware acceleration for interactive elements */
.product-card,
.checkout-button,
.quantity-btn {
    transform: translateZ(0);
}

/* Optimize scrolling performance */
.cart-items {
    contain: size layout style;
    transform: translateZ(0);
}

/* =================================
   UTILITY CLASSES
   ================================= */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mb-1 {
    margin-bottom: 0.25rem;
}

.mb-2 {
    margin-bottom: 0.5rem;
}

.mb-3 {
    margin-bottom: 1rem;
}

.mb-4 {
    margin-bottom: 1.5rem;
}

.mt-1 {
    margin-top: 0.25rem;
}

.mt-2 {
    margin-top: 0.5rem;
}

.mt-3 {
    margin-top: 1rem;
}

.mt-4 {
    margin-top: 1.5rem;
}

.hidden {
    display: none;
}

.loading {
    opacity: 0.5;
    pointer-events: none;
}