/* Bootstrap 5 后台管理系统 - 侧边栏样式 */

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: linear-gradient(180deg, var(--admin-bg-sidebar) 0%, var(--admin-bg-sidebar-dark) 100%);
  color: var(--admin-text-white);
  z-index: 1000;
  transition: all 0.3s ease;
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
}

.sidebar.collapsed {
  width: var(--sidebar-collapsed-width);
}

.sidebar.collapsed .sidebar-brand-text,
.sidebar.collapsed .nav-text,
.sidebar.collapsed .nav-arrow,
.sidebar.collapsed .user-details {
  opacity: 0;
  visibility: hidden;
}

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

.sidebar.collapsed .nav-link {
  justify-content: center;
  padding-left: 1rem;
  padding-right: 1rem;
}

/* 侧边栏头部 */
.sidebar-header {
  padding: 1.5rem 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-brand {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--admin-text-white);
  transition: all 0.3s ease;
}

.sidebar-logo {
  width: 40px;
  height: 40px;
  border-radius: 0.5rem;
  object-fit: cover;
  margin-right: 0.75rem;
  flex-shrink: 0;
}

.sidebar-brand-text {
  transition: all 0.3s ease;
}

.brand-name {
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 2px;
}

.brand-subtitle {
  font-size: 0.75rem;
  opacity: 0.7;
  line-height: 1;
}

/* 侧边栏菜单 */
.sidebar-menu {
  flex: 1;
  padding: 1rem 0;
}

.sidebar-menu .nav {
  padding: 0 0.5rem;
}

.sidebar-menu .nav-item {
  margin-bottom: 0.25rem;
}

.sidebar-menu .nav-link {
  display: flex;
  align-items: center;
  padding: 0.75rem 1rem;
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  border-radius: 0.5rem;
  transition: all 0.3s ease;
  position: relative;
  font-size: 0.875rem;
  font-weight: 500;
}

.sidebar-menu .nav-link:hover {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--admin-text-white);
  transform: translateX(2px);
}

.sidebar-menu .nav-link.active {
  background-color: var(--admin-primary);
  color: var(--admin-text-white);
  box-shadow: var(--admin-shadow-md);
}

.nav-icon {
  width: 20px;
  height: 20px;
  margin-right: 0.75rem;
  flex-shrink: 0;
  font-size: 1.125rem;
}

.nav-icon-sub {
  width: 16px;
  height: 16px;
  margin-right: 0.75rem;
  flex-shrink: 0;
  font-size: 0.875rem;
}

.nav-text {
  flex: 1;
  transition: all 0.3s ease;
}

.nav-arrow {
  margin-left: auto;
  transition: transform 0.3s ease;
  font-size: 0.75rem;
}

.nav-link[aria-expanded="true"] .nav-arrow {
  transform: rotate(180deg);
}

/* 子菜单 */
.submenu {
  background-color: rgba(0, 0, 0, 0.2);
  border-radius: 0.5rem;
  margin: 0.25rem 0;
  padding: 0.5rem 0;
}

.submenu .nav-link {
  padding: 0.5rem 1.5rem;
  font-size: 0.8125rem;
  margin-bottom: 2px;
}

.submenu .nav-link:hover {
  background-color: rgba(255, 255, 255, 0.05);
}

.submenu .nav-link.active {
  background-color: var(--admin-primary-light);
}

/* 侧边栏底部 */
.sidebar-footer {
  padding: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.user-info {
  display: flex;
  align-items: center;
  padding: 0.75rem;
  background-color: rgba(255, 255, 255, 0.05);
  border-radius: 0.5rem;
  transition: all 0.3s ease;
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  margin-right: 0.75rem;
  flex-shrink: 0;
}

.user-avatar img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
}

.user-details {
  flex: 1;
  transition: all 0.3s ease;
}

.user-name {
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 2px;
}

.user-role {
  font-size: 0.75rem;
  opacity: 0.7;
  line-height: 1;
}

/* 响应式 */
@media (max-width: 767.98px) {
  .sidebar {
    transform: translateX(-100%);
    width: var(--sidebar-width);
  }
  
  .sidebar.show {
    transform: translateX(0);
  }
}