/* 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-color: #f5f5f5;
}

/* 应用容器 */
.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* 头部样式 */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px;
  height: 60px;
  background-color: #fff;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

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

.logo {
  height: 40px;
  margin-right: 10px;
}

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

.logout-btn {
  padding: 8px 16px;
  background-color: #f44336;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

.logout-btn:hover {
  background-color: #d32f2f;
}

/* 主内容区域 */
.app-main {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* 侧边栏 */
.sidebar {
  width: 240px;
  background-color: #fff;
  border-right: 1px solid #e0e0e0;
  overflow-y: auto;
}

.menu-list {
  list-style: none;
  padding: 20px 0;
}

.menu-item {
  display: flex;
  align-items: center;
  padding: 12px 20px;
  cursor: pointer;
  transition: all 0.3s ease;
  border-left: 3px solid transparent;
}

.menu-item:hover {
  background-color: #f5f5f5;
  border-left-color: #3498db;
}

.menu-item.active {
  background-color: #e3f2fd;
  border-left-color: #2196f3;
  color: #1976d2;
}

.menu-item.active .menu-icon {
  filter: brightness(0.8);
}

.menu-icon {
  width: 24px;
  height: 24px;
  margin-right: 12px;
}

.submenu {
  list-style: none;
  padding-left: 20px;
}

/* 内容区域 */
.content-area {
  flex: 1;
  overflow: hidden;
}

.page-content {
  width: 100%;
  height: 100%;
  border: none;
}

/* 故障窗口样式 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
}

.modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: white;
    padding: 20px;
    border-radius: 5px;
    min-width: 300px;
    text-align: center;
}

.modal-content h2 {
    color: #e74c3c;
    margin-bottom: 15px;
}

.modal-content p {
    margin-bottom: 20px;
    color: #333;
}

.close-btn {
    background-color: #3498db;
    color: white;
    border: none;
    padding: 8px 20px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
}

.close-btn:hover {
    background-color: #2980b9;
}