/**
 * 电商自动化运营系统 - 全局样式
 * @version 2.0.0
 */

/* ========== 重置样式 ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* ========== 基础样式 ========== */
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: #f5f7fa;
  color: #333;
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: #667eea;
  text-decoration: none;
  transition: color 0.3s;
}

a:hover {
  color: #764ba2;
}

/* ========== 导航栏 ========== */
.navbar {
  background: white;
  padding: 16px 24px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-brand {
  font-size: 20px;
  font-weight: bold;
  color: #667eea;
}

.nav-links {
  display: flex;
  gap: 24px;
}

.nav-links a {
  color: #666;
  padding: 8px 16px;
  border-radius: 8px;
  transition: all 0.3s;
}

.nav-links a:hover,
.nav-links a.active {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

.nav-user {
  display: flex;
  gap: 16px;
  align-items: center;
}

/* ========== 容器 ========== */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px;
}

/* ========== 卡片 ========== */
.card {
  background: white;
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}

/* ========== 按钮 ========== */
.btn {
  display: inline-block;
  padding: 10px 20px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.3s;
}

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

.btn:disabled {
  background: #ccc;
  cursor: not-allowed;
  transform: none;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 16px;
}

.btn-outline {
  background: transparent;
  border: 2px solid #667eea;
  color: #667eea;
}

.btn-outline:hover {
  background: #667eea;
  color: white;
}

/* ========== 表单 ========== */
.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: #333;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: 14px;
  transition: border-color 0.3s, box-shadow 0.3s;
}

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

.form-textarea {
  min-height: 100px;
  resize: vertical;
}

/* ========== 表格 ========== */
.table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.table th,
.table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid #eee;
}

.table th {
  background: #f8f9fa;
  font-weight: 600;
  color: #333;
}

.table tr:hover {
  background: #f8f9fa;
}

.table tr:last-child td {
  border-bottom: none;
}

/* ========== 状态标签 ========== */
.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

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

.badge-warning {
  background: #fff3e0;
  color: #ef6c00;
}

.badge-error {
  background: #ffebee;
  color: #c62828;
}

.badge-info {
  background: #e3f2fd;
  color: #1976d2;
}

/* ========== 网格布局 ========== */
.grid {
  display: grid;
  gap: 24px;
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* ========== 加载动画 ========== */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  color: #666;
}

.loading::before {
  content: '';
  width: 24px;
  height: 24px;
  border: 3px solid #eee;
  border-top-color: #667eea;
  border-radius: 50%;
  margin-right: 12px;
  animation: spin 1s linear infinite;
}

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

/* ========== 空状态 ========== */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: #666;
}

.empty-state-icon {
  font-size: 64px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-state-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  color: #333;
}

.empty-state-desc {
  font-size: 14px;
}

/* ========== 响应式 ========== */
@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
    gap: 16px;
  }
  
  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
  }
  
  .container {
    padding: 16px;
  }
}

/* ========== 工具类 ========== */
.text-center {
  text-align: center;
}

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

.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }

.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

.hidden {
  display: none;
}

.flex {
  display: flex;
}

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

.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.gap-3 { gap: 24px; }

/* ========== 打印样式 ========== */
@media print {
  .navbar,
  .btn,
  .no-print {
    display: none !important;
  }
  
  body {
    background: white;
  }
  
  .card {
    box-shadow: none;
    border: 1px solid #ddd;
  }
}