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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Helvetica Neue', sans-serif;
  background: #f5f6fa;
  overflow-x: hidden;
}

/* .app-container 样式已移至 login.css 中的 .app-wrapper
.app-container {
  display: flex;
  height: 100vh;
  position: relative;
}
*/

/* ============================================
   左侧导航栏样式
   ============================================ */
/* 侧边栏容器 */
.sidebar {
  width: 260px;
  background: white;
  box-shadow: 2px 0 10px rgba(0, 0, 0, 0.05);
  display: flex;
  flex-direction: column;
  transition: width 0.3s ease;
  position: relative;
  z-index: 100;
  flex-shrink: 0;  /* 防止侧边栏被压缩 */
}

.sidebar.collapsed {
  width: 60px;
}

/* 侧边栏头部 */
.sidebar-header {
  padding: 20px;
  border-bottom: 1px solid #f0f0f0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.sidebar-title {
  display: flex;
  align-items: center;
  gap: 12px;
  color: white;
  font-size: 18px;
  font-weight: 600;
}

.sidebar-toggle {
  background: rgba(255, 255, 255, 0.2);
  border: none;
  color: white;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s;
}

.sidebar-toggle:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* 侧边栏内容区 */
.sidebar-content {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
}

/* 登录卡片样式 */
.auth-card {
  background: linear-gradient(135deg, #667eea15 0%, #764ba215 100%);
  border-radius: 16px;
  padding: 30px 20px;
  text-align: center;
  border: 1px solid rgba(102, 126, 234, 0.1);
}

.auth-icon {
  font-size: 48px;
  color: #667eea;
  margin-bottom: 15px;
}

.auth-hint {
  color: #666;
  font-size: 14px;
  margin-bottom: 20px;
}

.auth-login-btn {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  padding: 12px 24px;
  border-radius: 25px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.3s;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.auth-login-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

/* 用户信息区域 */
.sidebar-user-info {
  background: linear-gradient(135deg, #667eea15 0%, #764ba215 100%);
  border-radius: 12px;
  padding: 15px;
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.sidebar-avatar {
  width: 45px;
  height: 45px;
  border-radius: 50%;
  border: 3px solid white;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.sidebar-user-details {
  flex: 1;
}

.sidebar-username {
  display: block;
  font-weight: 600;
  color: #2c3e50;
  font-size: 14px;
  margin-bottom: 2px;
}

.sidebar-user-status {
  display: block;
  font-size: 12px;
  color: #27ae60;
  display: flex;
  align-items: center;
  gap: 4px;
}

.sidebar-user-status::before {
  content: '';
  width: 6px;
  height: 6px;
  background: #27ae60;
  border-radius: 50%;
  display: inline-block;
}

/* 菜单项 */
.sidebar-item-header {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #999;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  margin: 20px 0 10px;
  letter-spacing: 0.5px;
}

.sidebar-btn {
  width: 100%;
  background: white;
  border: 1px solid #e0e0e0;
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 14px;
  color: #333;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: all 0.3s;
  margin-bottom: 10px;
  text-align: left;
}

.sidebar-btn:hover {
  background: #f8f9fa;
  border-color: #667eea;
  color: #667eea;
  transform: translateX(5px);
}

.sidebar-btn.danger {
  color: #e74c3c;
}

.sidebar-btn.danger:hover {
  background: #fff5f5;
  border-color: #e74c3c;
  color: #c0392b;
}

.sidebar-item {
  margin-bottom: 10px;
}

.sidebar-label {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: white;
  border: 1px solid #e0e0e0;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.3s;
  font-size: 14px;
  color: #333;
}

.sidebar-label:hover {
  background: #f8f9fa;
  border-color: #667eea;
  color: #667eea;
  transform: translateX(5px);
}

.sidebar-file-input {
  display: none;
}

/* 底部退出按钮 */
.sidebar-footer {
  padding: 20px;
  border-top: 1px solid #f0f0f0;
  background: white;
}

.sidebar-logout-btn {
  width: 100%;
  background: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%);
  color: white;
  border: none;
  padding: 12px;
  border-radius: 10px;
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.3s;
}

.sidebar-logout-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(231, 76, 60, 0.3);
}

/* 收起状态下的样式 */
.sidebar.collapsed {
  width: 60px;
}

.sidebar.collapsed .sidebar-text {
  display: none;
}

.sidebar.collapsed .sidebar-header {
  padding: 20px 10px;
}

.sidebar.collapsed .sidebar-title {
  justify-content: center;
}

.sidebar.collapsed .sidebar-title i {
  margin: 0;
}

.sidebar.collapsed .sidebar-toggle {
  position: absolute;
  right: 14px;
}

.sidebar.collapsed .sidebar-content {
  padding: 10px;
}

/* 登录状态 - 收起时只显示登录图标 */
.sidebar.collapsed .auth-card {
  padding: 10px;
  background: transparent;
  border: none;
}

.sidebar.collapsed .auth-icon {
  font-size: 32px;
  margin-bottom: 0;
}

.sidebar.collapsed .auth-hint {
  display: none;
}

.sidebar.collapsed .auth-login-btn {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

/* 已登录状态 - 收起时只显示头像 */
.sidebar.collapsed .sidebar-user-info {
  background: transparent;
  padding: 10px;
  border-radius: 0;
}

.sidebar.collapsed .sidebar-avatar {
  width: 40px;
  height: 40px;
  margin: 0 auto;
  display: block;
}

.sidebar.collapsed .sidebar-user-details {
  display: none;
}

/* 隐藏所有功能菜单 */
.sidebar.collapsed .sidebar-menu-wrapper {
  display: none !important;
}

/* 底部退出按钮 */
.sidebar.collapsed .sidebar-footer {
  padding: 10px;
}

.sidebar.collapsed .sidebar-logout-btn {
  padding: 10px;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  margin: 0 auto;
}

.sidebar.collapsed .sidebar-logout-btn span {
  display: none;
}

/* ============================================
   主内容区样式
   ============================================ */
.main-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: #f5f6fa;
  overflow: hidden;
  min-width: 0;  /* 防止flex子元素撑开 */
}

/* 顶部栏 - 已移至 style.css */
/*
.top-bar {
  background: white;
  padding: 20px 30px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
*/

.page-title {
  font-size: 24px;
  font-weight: 600;
  color: #2c3e50;
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-title i {
  color: #667eea;
}

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

.current-week,
.current-time {
  font-size: 14px;
  color: #666;
  padding: 8px 16px;
  background: #f8f9fa;
  border-radius: 20px;
}

.current-time {
  font-weight: 600;
  color: #667eea;
}

/* 内容区域 */
.content-area {
  flex: 1;
  padding: 30px;
  overflow-y: auto;
}

.course-table-container {
  background: white;
  border-radius: 20px;
  padding: 20px;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
}

/* 空状态 */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 400px;
  background: white;
  border-radius: 20px;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
}

.empty-state i {
  font-size: 80px;
  color: #ddd;
  margin-bottom: 20px;
}

.empty-state h3 {
  color: #666;
  font-size: 20px;
  margin-bottom: 10px;
}

.empty-state p {
  color: #999;
  font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .sidebar {
    position: absolute;
    left: -260px;
    height: 100%;
    z-index: 1000;
  }
  
  .sidebar.active {
    left: 0;
  }
  
  .main-container {
    margin-left: 0 !important;
  }
}