/* ========== 绿源主题风格 ========== */
:root {
  --primary-color: #2E7D32;
  --primary-light: #4CAF50;
  --primary-dark: #1B5E20;
  --accent-color: #FF9800;
  --bg-page: #F5F7FA;
  --bg-card: #FFFFFF;
  --text-primary: #1E293B;
  --text-secondary: #475569;
  --border-light: #E2E8F0;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --radius-md: 16px;
  --radius-sm: 12px;
  --transition: all 0.2s ease;
}

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

body {
  font-family: 'Segoe UI', 'Roboto', system-ui, -apple-system, sans-serif;
  background: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.app-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px;
  position: relative;
}

/* ========== 头部 ========== */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
  margin-bottom: 20px;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  font-size: 36px;
  color: var(--primary-color);
  background: rgba(46,125,50,0.1);
  padding: 8px;
  border-radius: 50%;
}

.app-title {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary-dark);
  letter-spacing: 1px;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 15px;
}

.config-icon {
  font-size: 28px;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 8px;
  border-radius: 50%;
  transition: var(--transition);
  display: block;
}

.config-icon:hover {
  background: rgba(0,0,0,0.05);
  color: var(--primary-color);
}

/* ========== 搜索区域 ========== */
.search-section {
  margin-bottom: 24px;
}

.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-card);
  border-radius: 40px;
  padding: 12px 20px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  margin-bottom: 16px;
}

.search-icon {
  color: var(--text-secondary);
  margin-right: 12px;
}

#searchInput {
  border: none;
  outline: none;
  width: 100%;
  font-size: 1rem;
  background: transparent;
}

.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.filter-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  padding: 8px 18px;
  border-radius: 30px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition);
  color: var(--text-secondary);
}

.filter-btn:hover {
  border-color: var(--primary-light);
  color: var(--primary-color);
}

.filter-btn.active {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
  font-weight: 500;
}

/* ========== 产品网格 ========== */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin-bottom: 80px;
}

.empty-state {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  color: var(--text-secondary);
  background: var(--bg-card);
  border-radius: var(--radius-md);
}

.empty-state span {
  font-size: 48px;
  margin-bottom: 12px;
}

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

.empty-state small {
  font-size: 0.85rem;
  color: #94a3b8;
}

.product-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  border: 2px solid var(--border-light);
  transition: var(--transition);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  user-select: none;
}

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

.product-card:active {
  transform: translateY(-2px);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
  gap: 8px;
}

.model-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary-dark);
  flex: 1;
}

.price-tag {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent-color);
  margin: 8px 0 12px;
}

.config-brief {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: auto;
}

.config-brief span {
  background: #F0FDF4;
  padding: 4px 10px;
  border-radius: 20px;
  color: var(--primary-dark);
  white-space: nowrap;
}

/* ========== SKU 选择弹窗 ========== */
.sku-battery-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 15px 0;
}

.sku-battery-btn {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border: 2px solid var(--border-light);
  border-radius: 16px;
  cursor: pointer;
  transition: var(--transition);
  background: white;
  font-size: 1rem;
  user-select: none;
}

.sku-battery-btn:hover {
  border-color: var(--primary-color);
  background: #f0fdf4;
}

.sku-battery-btn.selected {
  border-color: var(--primary-color);
  background: #e8f5e9;
  box-shadow: 0 0 0 3px rgba(46,125,50,0.15);
}

.sku-battery-name {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-primary);
}

.sku-battery-info {
  display: flex;
  gap: 20px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 4px;
}

.sku-battery-price {
  font-weight: 700;
  color: var(--accent-color);
  font-size: 1.2rem;
  white-space: nowrap;
}

/* ========== 模态框 ========== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal-content {
  background: white;
  border-radius: 24px;
  width: 90%;
  max-width: 500px;
  max-height: 80vh;
  overflow-y: auto;
  padding: 24px;
  animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.sku-modal-content {
  max-width: 550px;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding-bottom: 15px;
  border-bottom: 1px solid var(--border-light);
}

.modal-header h2 {
  font-size: 1.3rem;
  color: var(--primary-dark);
}

.modal-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  padding: 5px;
  border-radius: 50%;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close:hover {
  background: #f1f5f9;
  color: var(--text-primary);
}

.modal-body {
  color: var(--text-primary);
}

.detail-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-light);
}

.detail-row:last-child {
  border-bottom: none;
}

.detail-row span {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.detail-row strong {
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
}

/* ========== 按钮通用样式 ========== */
.btn-primary {
  background: var(--primary-color);
  color: white;
  border: none;
  padding: 12px 20px;
  border-radius: 25px;
  font-weight: 600;
  cursor: pointer;
  width: 100%;
  font-size: 1rem;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

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

/* ========== 侧边栏样式 ========== */
.sidebar {
  position: fixed;
  top: 0;
  right: -100%;
  width: 100%;
  max-width: 320px;
  height: 100vh;
  background: white;
  box-shadow: -4px 0 20px rgba(0,0,0,0.15);
  z-index: 1000;
  transition: right 0.3s ease;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.sidebar.open {
  right: 0;
}

.sidebar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
  border-bottom: 1px solid var(--border-light);
  background: var(--primary-dark);
}

.sidebar-header h2 {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.2rem;
  color: white;
}

.sidebar-header h2 span {
  color: white;
}

.sidebar-close {
  background: none;
  border: none;
  cursor: pointer;
  color: white;
  padding: 8px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.sidebar-close:hover {
  background: rgba(255,255,255,0.2);
}

.sidebar-content {
  flex: 1;
  padding: 16px 0;
}

/* 侧边栏分组 */
.sidebar-section {
  margin-bottom: 24px;
}

.section-title {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  font-size: 0.75rem;
  font-weight: 600;
  color: #94a3b8;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 8px;
}

.section-title span {
  font-size: 18px;
}

/* 菜单项 - 修复对齐问题 */
.menu-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  cursor: pointer;
  transition: all 0.2s;
  color: var(--text-primary);
}

.menu-item:hover {
  background: #f1f5f9;
}

.menu-item span:first-child {
  width: 28px;
  font-size: 22px;
  color: var(--primary-color);
  text-align: center;
}

.menu-item span:last-child {
  flex: 1;
  line-height: 1.4;
}

/* 用户信息特殊处理 */
.menu-item.user-info {
  background: #e8f5e9;
  margin: 0 12px 8px 12px;
  border-radius: 12px;
  padding: 10px 16px;
}

.menu-item.user-info span:first-child {
  width: 28px;
}

.menu-item.user-info span:last-child {
  font-weight: 500;
  color: var(--primary-dark);
}

/* 遮罩层 */
.sidebar-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  z-index: 999;
  display: none;
}

.sidebar-overlay.show {
  display: block;
}

.menu-icon {
  cursor: pointer;
}

/* ========== 响应式 ========== */
@media (max-width: 768px) {
  .app-container {
    padding: 10px;
  }

  .app-title {
    font-size: 1.4rem;
  }

  .product-grid {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 15px;
  }

  .modal-content {
    width: 95%;
    padding: 20px;
    border-radius: 20px;
  }

  .sku-battery-btn {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .sku-battery-price {
    align-self: flex-end;
  }
  
  .sidebar {
    max-width: 280px;
  }
}

@media (max-width: 480px) {
  .product-grid {
    grid-template-columns: 1fr;
  }

  .app-header {
    flex-wrap: wrap;
    gap: 10px;
  }

  .header-right {
    margin-left: auto;
  }
  
  .sidebar {
    max-width: 260px;
  }
}