/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

/* 头部 */
.header {
    text-align: center;
    color: white;
    margin-bottom: 30px;
}

.header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* 主内容 */
.main-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* 卡片 */
.card {
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    overflow: hidden;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    background: #f8f9fa;
    border-bottom: 1px solid #e9ecef;
}

.card-header h2 {
    font-size: 1.25rem;
    color: #495057;
}

.card-actions {
    display: flex;
    gap: 10px;
}

.card-body {
    padding: 24px;
}

/* 表单 */
.form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-weight: 600;
    color: #495057;
    font-size: 0.95rem;
}

.form-group input {
    padding: 12px 16px;
    border: 1px solid #ced4da;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-hint {
    color: #6c757d;
    font-size: 0.85rem;
}

/* 按钮 */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: #f8f9fa;
    color: #495057;
    border: 1px solid #dee2e6;
}

.btn-secondary:hover {
    background: #e9ecef;
}

.btn-danger {
    background: #dc3545;
    color: white;
}

.btn-danger:hover {
    background: #c82333;
}

/* 统计网格 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 8px;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: #667eea;
    margin-bottom: 8px;
}

.stat-label {
    color: #6c757d;
    font-size: 0.95rem;
}

/* 商品表格 */
.product-table {
    width: 100%;
    overflow-x: auto;
}

.table-header {
    display: flex;
    background: #f8f9fa;
    padding: 12px 16px;
    border-radius: 8px 8px 0 0;
    font-weight: 600;
    color: #495057;
    gap: 10px;
}

.table-body {
    max-height: 500px;
    overflow-y: auto;
}

.table-row {
    display: flex;
    padding: 12px 16px;
    border-bottom: 1px solid #e9ecef;
    align-items: center;
    gap: 10px;
    transition: background 0.2s;
}

.table-row:hover {
    background: #f8f9fa;
}

.table-cell {
    display: flex;
    align-items: center;
}

.cell-id {
    flex: 0 0 120px;
    font-weight: 600;
    color: #667eea;
}

.cell-name {
    flex: 1;
    min-width: 200px;
}

.cell-price {
    flex: 0 0 120px;
    font-weight: 600;
    color: #28a745;
}

.cell-sales {
    flex: 0 0 100px;
    color: #6c757d;
}

.cell-status {
    flex: 0 0 100px;
}

.status-badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

.status-new {
    background: #d4edda;
    color: #155724;
}

.status-synced {
    background: #cce5ff;
    color: #004085;
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: #6c757d;
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state p {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

/* 页脚 */
.footer {
    text-align: center;
    color: white;
    margin-top: 30px;
    padding: 20px;
    opacity: 0.9;
}

/* Toast提示 */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 16px 24px;
    border-radius: 8px;
    background: white;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    transform: translateX(400px);
    transition: transform 0.3s ease;
    z-index: 1000;
}

.toast.show {
    transform: translateX(0);
}

.toast.success {
    border-left: 4px solid #28a745;
}

.toast.error {
    border-left: 4px solid #dc3545;
}

.toast.info {
    border-left: 4px solid #17a2b8;
}