/* ============================================
   门店记账台账系统 · 触屏适配样式
   云端数据、全端自适应、强光可见
   ============================================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

:root {
    /* 渠道颜色 */
    --color-cash: #FF9800;
    --color-wechat: #4CAF50;
    --color-alipay: #2196F3;
    
    /* 背景色 */
    --bg-primary: #F5F5F5;
    --bg-white: #FFFFFF;
    --bg-card: #FFFFFF;
    --bg-header: #1A1A2E;
    --bg-dashboard: #16213E;
    
    /* 文字色 */
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-light: #FFFFFF;
    --text-muted: #999999;
    
    /* 按钮色 */
    --btn-primary: #4CAF50;
    --btn-danger: #F44336;
    --btn-warning: #FF9800;
    
    /* 间距 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* ============================================
   整体布局
   ============================================ */
.app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ============================================
   顶部导航栏
   ============================================ */
.header {
    background: var(--bg-header);
    color: var(--text-light);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.shop-name {
    font-size: 1.5rem;
    font-weight: 600;
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.time {
    font-size: 1rem;
    opacity: 0.8;
}

.btn-icon {
    background: rgba(255,255,255,0.15);
    border: none;
    color: var(--text-light);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-icon:hover {
    background: rgba(255,255,255,0.25);
}

/* ============================================
   实时看板
   ============================================ */
.dashboard {
    background: var(--bg-dashboard);
    padding: var(--spacing-md);
    display: flex;
    gap: var(--spacing-sm);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.dashboard-item {
    flex: 1;
    min-width: 100px;
    background: rgba(255,255,255,0.1);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    text-align: center;
    color: var(--text-light);
}

.dashboard-value {
    display: block;
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.dashboard-label {
    font-size: 0.75rem;
    opacity: 0.8;
}

.dashboard-item.channel-cash .dashboard-value { color: var(--color-cash); }
.dashboard-item.channel-wechat .dashboard-value { color: var(--color-wechat); }
.dashboard-item.channel-alipay .dashboard-value { color: var(--color-alipay); }

/* ============================================
   主体三栏布局
   ============================================ */
.main {
    flex: 1;
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    overflow: hidden;
}

.panel-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

/* ============================================
   商品快捷区
   ============================================ */
.goods-panel {
    flex: 2;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    overflow-y: auto;
}

.goods-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: var(--spacing-sm);
}

.goods-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg) var(--spacing-sm);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s;
    min-height: 80px;
    font-size: 1rem;
    font-weight: 600;
}

.goods-btn:active {
    transform: scale(0.95);
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.goods-name {
    margin-bottom: var(--spacing-xs);
}

.goods-price {
    font-size: 0.85rem;
    opacity: 0.9;
}

/* ============================================
   购物清单
   ============================================ */
.cart-panel {
    flex: 2;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.cart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.btn-text {
    background: none;
    border: none;
    color: var(--btn-danger);
    font-size: 0.9rem;
    cursor: pointer;
    padding: var(--spacing-xs) var(--spacing-sm);
}

.cart-list {
    flex: 1;
    overflow-y: auto;
}

.empty-cart {
    text-align: center;
    color: var(--text-muted);
    padding: var(--spacing-xl);
}

.cart-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid #F0F0F0;
}

.cart-item-info {
    flex: 1;
}

.cart-item-name {
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.cart-item-price {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

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

.qty-btn {
    width: 32px;
    height: 32px;
    border: 1px solid #DDD;
    background: #FAFAFA;
    border-radius: 50%;
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.qty-btn:hover {
    background: #F0F0F0;
}

.cart-item-qty {
    min-width: 24px;
    text-align: center;
    font-weight: 600;
}

.cart-item-subtotal {
    min-width: 70px;
    text-align: right;
    font-weight: 600;
    color: var(--btn-primary);
}

.cart-item-delete {
    color: var(--btn-danger);
    cursor: pointer;
    padding: var(--spacing-xs);
    font-size: 1.2rem;
}

.cart-footer {
    border-top: 2px solid #EEE;
    padding-top: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.cart-total {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.1rem;
}

.total-amount {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--btn-primary);
}

/* ============================================
   操作区
   ============================================ */
.action-panel {
    flex: 2;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.channel-selector {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.channel-btn {
    padding: var(--spacing-lg);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    color: white;
}

.channel-btn.channel-cash { background: var(--color-cash); }
.channel-btn.channel-wechat { background: var(--color-wechat); }
.channel-btn.channel-alipay { background: var(--color-alipay); }

.channel-btn.active {
    border-color: #333;
    transform: scale(1.02);
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

/* 数字键盘 */
.numpad {
    margin-top: var(--spacing-sm);
}

.numpad-display {
    width: 100%;
    padding: var(--spacing-md);
    font-size: 1.2rem;
    text-align: right;
    border: 1px solid #DDD;
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
    background: #FAFAFA;
}

.numpad-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
}

.numpad-grid button {
    padding: var(--spacing-md);
    font-size: 1.3rem;
    font-weight: 600;
    border: 1px solid #DDD;
    background: white;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.15s;
}

.numpad-grid button:active {
    background: #E0E0E0;
}

/* 提交按钮 */
.action-buttons {
    margin-top: auto;
}

.btn-submit {
    width: 100%;
    padding: var(--spacing-lg);
    font-size: 1.2rem;
    font-weight: 700;
    color: white;
    background: linear-gradient(135deg, #4CAF50 0%, #45A049 100%);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s;
    box-shadow: 0 4px 12px rgba(76, 175, 80, 0.4);
}

.btn-submit:active {
    transform: scale(0.98);
}

.btn-submit:disabled {
    background: #CCC;
    box-shadow: none;
    cursor: not-allowed;
}

/* 网络状态 */
.network-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: #F5F5F5;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #999;
}

.status-dot.online { background: var(--btn-primary); }
.status-dot.offline { background: var(--btn-danger); }

/* ============================================
   Toast提示
   ============================================ */
.toast {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0,0,0,0.8);
    color: white;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-size: 1rem;
    z-index: 9999;
    animation: toastIn 0.3s ease;
}

@keyframes toastIn {
    from { opacity: 0; transform: translateX(-50%) translateY(20px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ============================================
   统计页面样式
   ============================================ */
.stats-container {
    padding: var(--spacing-md);
}

.stats-filter {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

.filter-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid #DDD;
    background: white;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.9rem;
}

.filter-btn.active {
    background: var(--bg-header);
    color: white;
    border-color: var(--bg-header);
}

.stats-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.stats-card-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid #EEE;
}

.channel-summary {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.channel-stat {
    text-align: center;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    color: white;
}

.channel-stat.cash { background: var(--color-cash); }
.channel-stat.wechat { background: var(--color-wechat); }
.channel-stat.alipay { background: var(--color-alipay); }

.channel-stat-value {
    font-size: 1.5rem;
    font-weight: 700;
}

.channel-stat-label {
    font-size: 0.85rem;
    opacity: 0.9;
    margin-top: var(--spacing-xs);
}

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

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

.goods-stats-table th {
    background: #F5F5F5;
    font-weight: 600;
}

.goods-stats-table tr:hover {
    background: #FAFAFA;
}

.bill-list {
    max-height: 400px;
    overflow-y: auto;
}

.bill-item {
    padding: var(--spacing-md);
    border-bottom: 1px solid #EEE;
}

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

.bill-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-xs);
}

.bill-no {
    font-weight: 600;
}

.bill-channel {
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    color: white;
}

.bill-channel.cash { background: var(--color-cash); }
.bill-channel.wechat { background: var(--color-wechat); }
.bill-channel.alipay { background: var(--color-alipay); }

.bill-time {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.bill-amount {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--btn-primary);
}

.bill-items {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

/* ============================================
   后台管理页面
   ============================================ */
.admin-container {
    padding: var(--spacing-md);
}

.admin-section {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.admin-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--bg-header);
}

.goods-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.goods-card {
    border: 1px solid #EEE;
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.goods-card-info {
    flex: 1;
}

.goods-card-name {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.goods-card-price {
    color: var(--btn-primary);
    font-weight: 600;
}

.goods-card-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.btn-small {
    padding: var(--spacing-xs) var(--spacing-md);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.85rem;
}

.btn-edit {
    background: #2196F3;
    color: white;
}

.btn-delete {
    background: #F44336;
    color: white;
}

/* 表单样式 */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.form-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid #DDD;
    border-radius: var(--radius-sm);
    font-size: 1rem;
}

.btn-primary {
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--btn-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    cursor: pointer;
}

/* 登录页面 */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    width: 100%;
    max-width: 400px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.2);
}

.login-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    font-size: 1.5rem;
}

/* ============================================
   响应式适配
   ============================================ */
@media (max-width: 1024px) {
    .main {
        flex-direction: column;
    }
    
    .goods-panel, .cart-panel, .action-panel {
        flex: none;
    }
    
    .goods-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 768px) {
    .dashboard {
        padding: var(--spacing-sm);
    }
    
    .dashboard-item {
        min-width: 80px;
        padding: var(--spacing-sm);
    }
    
    .dashboard-value {
        font-size: 1.1rem;
    }
    
    .goods-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .channel-summary {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .header {
        padding: var(--spacing-sm);
    }
    
    .shop-name {
        font-size: 1.2rem;
    }
    
    .goods-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cart-panel, .action-panel {
        padding: var(--spacing-sm);
    }
}

/* ============================================
   工具类
   ============================================ */
.loading {
    text-align: center;
    color: var(--text-muted);
    padding: var(--spacing-xl);
}

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

.mt-md {
    margin-top: var(--spacing-md);
}

.mb-md {
    margin-bottom: var(--spacing-md);
}