/**
 * 智慧社区IOT安防系统 - 全局样式
 * 主色调：深蓝色 #234fa2
 * 设计风格：科技感、稳重庄重
 */

/* ========== CSS变量定义 ========== */
:root {
  /* 主色系 */
  --primary-color: #234fa2;
  --primary-light: #3a6bc9;
  --primary-dark: #1a3c7a;
  
  /* 背景色系 */
  --bg-dark: #0a0e1a;
  --bg-card: #111827;
  --bg-card-light: #1a2234;
  --bg-hover: #1e293b;
  
  /* 边框色 */
  --border-color: #1e3a5f;
  --border-light: #2d4a6f;
  
  /* 文字色 */
  --text-primary: #e5e7eb;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  
  /* 状态色 */
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --danger-color: #ef4444;
  --info-color: #3b82f6;
  
  /* 尺寸 */
  --sidebar-width: 240px;
  --header-height: 60px;
  --border-radius: 8px;
  --border-radius-lg: 12px;
  
  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(35, 79, 162, 0.3);
}

/* ========== 全局重置 ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
}

a {
  color: var(--primary-light);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: #5a8be0;
}

/* ========== 布局容器 ========== */
.app-container {
  display: flex;
  min-height: 100vh;
}

.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.page-content {
  flex: 1;
  padding: 24px;
  overflow-y: auto;
}

/* ========== 侧边栏 ========== */
.sidebar {
  width: var(--sidebar-width);
  background: linear-gradient(180deg, #0f172a 0%, #0a0e1a 100%);
  border-right: 1px solid var(--border-color);
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
  z-index: 100;
}

.sidebar-header {
  height: var(--header-height);
  display: flex;
  align-items: center;
  padding: 0 20px;
  border-bottom: 1px solid var(--border-color);
  background: rgba(35, 79, 162, 0.1);
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: var(--shadow-glow);
}

.logo-text {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.logo-sub {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* 导航菜单 */
.nav-menu {
  flex: 1;
  overflow-y: auto;
  padding: 16px 0;
}

.nav-group {
  margin-bottom: 8px;
}

.nav-group-title {
  padding: 8px 20px;
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.nav-item {
  display: flex;
  align-items: center;
  padding: 12px 20px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
  border-left: 3px solid transparent;
}

.nav-item:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.nav-item.active {
  background: rgba(35, 79, 162, 0.2);
  color: var(--primary-light);
  border-left-color: var(--primary-light);
}

.nav-icon {
  width: 20px;
  height: 20px;
  margin-right: 12px;
  font-size: 18px;
}

.nav-text {
  flex: 1;
  font-size: 14px;
}

.nav-badge {
  background: var(--danger-color);
  color: white;
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 10px;
  min-width: 20px;
  text-align: center;
}

/* ========== 顶部栏 ========== */
.header {
  height: var(--header-height);
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.page-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
}

.breadcrumb-sep {
  color: var(--text-muted);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 20px;
}

.header-action {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--bg-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
  position: relative;
}

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

.header-action .badge {
  position: absolute;
  top: -4px;
  right: -4px;
  background: var(--danger-color);
  color: white;
  font-size: 10px;
  padding: 2px 5px;
  border-radius: 8px;
  min-width: 16px;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s;
}

.user-info:hover {
  background: var(--bg-hover);
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

.user-name {
  font-size: 13px;
  color: var(--text-primary);
}

/* ========== 卡片组件 ========== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: all 0.3s;
}

.card:hover {
  border-color: var(--border-light);
  box-shadow: var(--shadow-md);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-card-light);
}

.card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-title-icon {
  color: var(--primary-light);
}

.card-body {
  padding: 20px;
}

.card-footer {
  padding: 12px 20px;
  border-top: 1px solid var(--border-color);
  background: var(--bg-card-light);
}

/* ========== 统计卡片 ========== */
.stat-card {
  background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-card-light) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 20px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  transition: all 0.3s;
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.stat-icon.blue {
  background: rgba(59, 130, 246, 0.2);
  color: #3b82f6;
}

.stat-icon.green {
  background: rgba(16, 185, 129, 0.2);
  color: #10b981;
}

.stat-icon.orange {
  background: rgba(245, 158, 11, 0.2);
  color: #f59e0b;
}

.stat-icon.red {
  background: rgba(239, 68, 68, 0.2);
  color: #ef4444;
}

.stat-icon.purple {
  background: rgba(139, 92, 246, 0.2);
  color: #8b5cf6;
}

.stat-content {
  flex: 1;
}

.stat-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.stat-label {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.stat-trend {
  font-size: 12px;
  margin-top: 8px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.stat-trend.up {
  color: var(--success-color);
}

.stat-trend.down {
  color: var(--danger-color);
}

/* ========== 表格样式 ========== */
.table-container {
  overflow-x: auto;
}

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

.data-table th,
.data-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.data-table th {
  background: var(--bg-card-light);
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 13px;
  white-space: nowrap;
}

.data-table td {
  font-size: 14px;
  color: var(--text-primary);
}

.data-table tbody tr:hover {
  background: var(--bg-hover);
}

/* ========== 状态标签 ========== */
.status-tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 500;
}

.status-tag.success {
  background: rgba(16, 185, 129, 0.15);
  color: #10b981;
}

.status-tag.warning {
  background: rgba(245, 158, 11, 0.15);
  color: #f59e0b;
}

.status-tag.danger {
  background: rgba(239, 68, 68, 0.15);
  color: #ef4444;
}

.status-tag.info {
  background: rgba(59, 130, 246, 0.15);
  color: #3b82f6;
}

.status-tag.default {
  background: rgba(107, 114, 128, 0.15);
  color: #9ca3af;
}

/* ========== AI标签 ========== */
.ai-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.2) 0%, rgba(79, 70, 229, 0.2) 100%);
  border: 1px solid rgba(139, 92, 246, 0.5);
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  color: #a78bfa;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  animation: ai-glow 2s ease-in-out infinite;
  box-shadow: 0 0 8px rgba(139, 92, 246, 0.3);
  margin-left: 6px;
  vertical-align: middle;
}

@keyframes ai-glow {
  0%, 100% {
    box-shadow: 0 0 8px rgba(139, 92, 246, 0.3);
    border-color: rgba(139, 92, 246, 0.5);
  }
  50% {
    box-shadow: 0 0 12px rgba(139, 92, 246, 0.5);
    border-color: rgba(139, 92, 246, 0.7);
  }
}

.ai-tag::before {
  content: '🤖';
  font-size: 10px;
}

/* ========== 按钮样式 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
  outline: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  color: white;
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow);
}

.btn-secondary {
  background: var(--bg-hover);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--bg-card-light);
  border-color: var(--border-light);
}

.btn-danger {
  background: rgba(239, 68, 68, 0.2);
  color: #ef4444;
}

.btn-danger:hover {
  background: rgba(239, 68, 68, 0.3);
}

.btn-sm {
  padding: 5px 10px;
  font-size: 12px;
}

.btn-lg {
  padding: 12px 24px;
  font-size: 15px;
}

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

.form-label {
  display: block;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-input,
.form-select {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-primary);
  font-size: 14px;
  transition: all 0.2s;
}

.form-input:focus,
.form-select:focus {
  outline: none;
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(35, 79, 162, 0.2);
}

.form-input::placeholder {
  color: var(--text-muted);
}

/* ========== 网格布局 ========== */
.grid {
  display: grid;
  gap: 20px;
}

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

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

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

.grid-5 {
  grid-template-columns: repeat(5, 1fr);
}

@media (max-width: 1400px) {
  .grid-5 {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (max-width: 1200px) {
  .grid-4, .grid-5 {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 992px) {
  .grid-3, .grid-4, .grid-5 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4, .grid-5 {
    grid-template-columns: 1fr;
  }
}

/* ========== 告警列表 ========== */
.alert-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px;
  background: var(--bg-card-light);
  border-radius: 8px;
  border-left: 3px solid transparent;
  margin-bottom: 12px;
  transition: all 0.2s;
}

.alert-item:hover {
  background: var(--bg-hover);
}

.alert-item.urgent {
  border-left-color: var(--danger-color);
  background: rgba(239, 68, 68, 0.05);
}

.alert-item.important {
  border-left-color: var(--warning-color);
  background: rgba(245, 158, 11, 0.05);
}

.alert-item.normal {
  border-left-color: var(--info-color);
}

.alert-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.alert-item.urgent .alert-icon {
  background: rgba(239, 68, 68, 0.2);
  color: var(--danger-color);
}

.alert-item.important .alert-icon {
  background: rgba(245, 158, 11, 0.2);
  color: var(--warning-color);
}

.alert-item.normal .alert-icon {
  background: rgba(59, 130, 246, 0.2);
  color: var(--info-color);
}

.alert-content {
  flex: 1;
  min-width: 0;
}

.alert-title {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.alert-desc {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.alert-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 12px;
  color: var(--text-muted);
}

.alert-actions {
  display: flex;
  gap: 8px;
}

/* ========== 视频网格 ========== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.video-item {
  aspect-ratio: 16/9;
  background: #000;
  border-radius: 8px;
  overflow: hidden;
  position: relative;
  cursor: pointer;
  transition: all 0.3s;
}

.video-item:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-lg);
}

.video-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #1a2234 0%, #0f172a 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 14px;
}

.video-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 8px 12px;
  background: linear-gradient(transparent, rgba(0,0,0,0.8));
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.video-title {
  font-size: 12px;
  color: white;
}

.video-status {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success-color);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* ========== 热力图 ========== */
.heatmap-container {
  position: relative;
  background: var(--bg-card-light);
  border-radius: 8px;
  overflow: hidden;
  aspect-ratio: 2/1;
}

.heatmap-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
}

/* ========== 进度条 ========== */
.progress-bar {
  height: 8px;
  background: var(--bg-dark);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.3s;
}

.progress-fill.blue {
  background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
}

.progress-fill.green {
  background: linear-gradient(90deg, #059669, #10b981);
}

.progress-fill.orange {
  background: linear-gradient(90deg, #d97706, #f59e0b);
}

.progress-fill.red {
  background: linear-gradient(90deg, #dc2626, #ef4444);
}

/* ========== 空状态 ========== */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.empty-icon {
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-text {
  font-size: 14px;
}

/* ========== 加载动画 ========== */
.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-color);
  border-top-color: var(--primary-light);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* ========== 工具提示 ========== */
.tooltip {
  position: relative;
}

.tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-card);
  color: var(--text-primary);
  padding: 6px 10px;
  border-radius: 4px;
  font-size: 12px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
  border: 1px solid var(--border-color);
}

.tooltip:hover::after {
  opacity: 1;
}

/* ========== 分页 ========== */
.pagination {
  display: flex;
  align-items: center;
  gap: 8px;
  justify-content: center;
  margin-top: 20px;
}

.page-item {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.page-item:hover {
  border-color: var(--primary-color);
  color: var(--primary-light);
}

.page-item.active {
  background: var(--primary-color);
  border-color: var(--primary-color);
  color: white;
}

/* ========== 响应式适配 ========== */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
  }
  
  .main-content {
    margin-left: 0;
  }
  
  .video-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .header {
    padding: 0 16px;
  }
  
  .page-content {
    padding: 16px;
  }
  
  .video-grid {
    grid-template-columns: 1fr;
  }
}