.app-header {
  display: flex;
  align-items: center;
  padding: 0 16px;
  flex-shrink: 0;
  background: #fff !important;
  border-bottom: 1px solid #e8e8e8;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
  z-index: 10;
}

.app-sider.ant-layout-sider-light {
  background: #eef3f9 !important;
  border-right: 1px solid #dde5ef;
}

.app-sider .ant-layout-sider-children {
  display: flex;
  flex-direction: column;
}

.app-sider-menu.ant-menu-light {
  flex: 1;
  background: transparent !important;
  border-inline-end: none !important;
  padding: 8px 6px;
}

.app-sider-menu.ant-menu-light .ant-menu-item {
  margin: 4px 0;
  border-radius: 6px;
  width: 100%;
}

.app-sider-menu.ant-menu-light .ant-menu-item-selected {
  background: #fff !important;
  font-weight: 600;
  box-shadow: 0 1px 3px rgba(22, 119, 255, 0.12);
}

.app-shell-body.ant-layout {
  display: flex;
  flex: 1;
  min-height: 0;
}

.main-layout__content.ant-layout-content {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.main-layout__content--attempt,
.main-layout__content--scores {
  overflow: hidden !important;
}

.main-layout__content--attempt .main-layout__content-inner,
.main-layout__content--scores .main-layout__content-inner {
  flex: 1 1 0;
  min-height: 0;
  overflow: hidden;
}

.main-layout__content {
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.main-layout__content-inner {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.app-breadcrumb-row {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 12px;
  padding: 6px 14px;
  background: #fff;
  border-radius: 8px;
  border: 1px solid #f0f0f0;
}

.app-breadcrumb__back {
  flex-shrink: 0;
  padding-left: 0;
  padding-right: 8px;
  border-right: 1px solid #f0f0f0;
  margin-right: 4px;
  height: auto;
}

.app-breadcrumb {
  flex: 1;
  min-width: 0;
  margin-bottom: 0;
  padding: 4px 0;
  background: transparent;
  border: none;
  border-radius: 0;
}