.yyui-layout {
  display: flex;
  flex-direction: column;
}

.yyui-layout-has-sider {
  flex-direction: row;
}

.yyui-layout-header {
  flex: 0 0 auto;
}

.yyui-layout-sider {
  flex: 0 0 200px;
}

.yyui-layout-content {
  flex: auto;
}

.yyui-layout-footer {
  flex: 0 0 auto;
}