diff --git a/langs/de/tutorials/flow_portal/lesson.json b/langs/de/tutorials/flow_portal/lesson.json
index 024fe7fa..b7a5dfd1 100644
--- a/langs/de/tutorials/flow_portal/lesson.json
+++ b/langs/de/tutorials/flow_portal/lesson.json
@@ -7,7 +7,7 @@
       {
           "name": "styles",
 					"type": "css",
-          "content": ".app-container {\n  width: 200px;\n  height: 100px;\n  overflow: hidden;\n}\n\n.popup {\n  position: relative;\n  z-index: 2;\n  background: #ddd;\n  padding: 1rem;\n  min-height: 200px;\n  min-width: 200px;\n}\n\n.popup::after {\n  content: \" \";\n  position: absolute;\n  bottom: 100%;\n  left: 50%;\n  margin-left: -5px;\n  border-width: 5px;\n  border-style: solid;\n  border-color: transparent transparent #ddd transparent;\n}"
+          "content": ".app-container {\n  width: 200px;\n  height: 100px;\n  overflow: hidden;\n}\n\n.popup {\n  color: #333;\n  position: relative;\n  z-index: 2;\n  background: #ddd;\n  padding: 1rem;\n  min-height: 200px;\n  min-width: 200px;\n}\n\n.popup::after {\n  content: \" \";\n  position: absolute;\n  bottom: 100%;\n  left: 50%;\n  margin-left: -5px;\n  border-width: 5px;\n  border-style: solid;\n  border-color: transparent transparent #ddd transparent;\n}"
       }
   ]
 }
diff --git a/langs/de/tutorials/flow_portal/solved.json b/langs/de/tutorials/flow_portal/solved.json
index 2de9f10b..7d341e7f 100644
--- a/langs/de/tutorials/flow_portal/solved.json
+++ b/langs/de/tutorials/flow_portal/solved.json
@@ -7,7 +7,7 @@
       {
           "name": "styles",
 					"type": "css",
-          "content": ".app-container {\n  width: 200px;\n  height: 100px;\n  overflow: hidden;\n}\n\n.popup {\n  position: relative;\n  z-index: 2;\n  background: #ddd;\n  padding: 1rem;\n  min-height: 200px;\n  min-width: 200px;\n}\n\n.popup::after {\n  content: \" \";\n  position: absolute;\n  bottom: 100%;\n  left: 50%;\n  margin-left: -5px;\n  border-width: 5px;\n  border-style: solid;\n  border-color: transparent transparent #ddd transparent;\n}"
+          "content": ".app-container {\n  width: 200px;\n  height: 100px;\n  overflow: hidden;\n}\n\n.popup {\n  color: #333;\n  position: relative;\n  z-index: 2;\n  background: #ddd;\n  padding: 1rem;\n  min-height: 200px;\n  min-width: 200px;\n}\n\n.popup::after {\n  content: \" \";\n  position: absolute;\n  bottom: 100%;\n  left: 50%;\n  margin-left: -5px;\n  border-width: 5px;\n  border-style: solid;\n  border-color: transparent transparent #ddd transparent;\n}"
       }
   ]
 }
diff --git a/langs/en/tutorials/flow_portal/lesson.json b/langs/en/tutorials/flow_portal/lesson.json
index 92e32b0c..b7a5dfd1 100644
--- a/langs/en/tutorials/flow_portal/lesson.json
+++ b/langs/en/tutorials/flow_portal/lesson.json
@@ -7,7 +7,7 @@
       {
           "name": "styles",
 					"type": "css",
-          "content": ".app-container {\n  width: 200px;\n  height: 100px;\n  overflow: hidden;\n}\n\n.dark .popup {\n  color: #333;\n}\n\n.popup {\n  position: relative;\n  z-index: 2;\n  background: #ddd;\n  padding: 1rem;\n  min-height: 200px;\n  min-width: 200px;\n}\n\n.popup::after {\n  content: \" \";\n  position: absolute;\n  bottom: 100%;\n  left: 50%;\n  margin-left: -5px;\n  border-width: 5px;\n  border-style: solid;\n  border-color: transparent transparent #ddd transparent;\n}"
+          "content": ".app-container {\n  width: 200px;\n  height: 100px;\n  overflow: hidden;\n}\n\n.popup {\n  color: #333;\n  position: relative;\n  z-index: 2;\n  background: #ddd;\n  padding: 1rem;\n  min-height: 200px;\n  min-width: 200px;\n}\n\n.popup::after {\n  content: \" \";\n  position: absolute;\n  bottom: 100%;\n  left: 50%;\n  margin-left: -5px;\n  border-width: 5px;\n  border-style: solid;\n  border-color: transparent transparent #ddd transparent;\n}"
       }
   ]
 }
diff --git a/langs/en/tutorials/flow_portal/solved.json b/langs/en/tutorials/flow_portal/solved.json
index 0c372626..7d341e7f 100644
--- a/langs/en/tutorials/flow_portal/solved.json
+++ b/langs/en/tutorials/flow_portal/solved.json
@@ -7,7 +7,7 @@
       {
           "name": "styles",
 					"type": "css",
-          "content": ".app-container {\n  width: 200px;\n  height: 100px;\n  overflow: hidden;\n}\n\n.dark .popup {\n  color: #333;\n}\n\n.popup {\n  position: relative;\n  z-index: 2;\n  background: #ddd;\n  padding: 1rem;\n  min-height: 200px;\n  min-width: 200px;\n}\n\n.popup::after {\n  content: \" \";\n  position: absolute;\n  bottom: 100%;\n  left: 50%;\n  margin-left: -5px;\n  border-width: 5px;\n  border-style: solid;\n  border-color: transparent transparent #ddd transparent;\n}"
+          "content": ".app-container {\n  width: 200px;\n  height: 100px;\n  overflow: hidden;\n}\n\n.popup {\n  color: #333;\n  position: relative;\n  z-index: 2;\n  background: #ddd;\n  padding: 1rem;\n  min-height: 200px;\n  min-width: 200px;\n}\n\n.popup::after {\n  content: \" \";\n  position: absolute;\n  bottom: 100%;\n  left: 50%;\n  margin-left: -5px;\n  border-width: 5px;\n  border-style: solid;\n  border-color: transparent transparent #ddd transparent;\n}"
       }
   ]
 }
diff --git a/langs/id/tutorials/flow_portal/lesson.json b/langs/id/tutorials/flow_portal/lesson.json
index 024fe7fa..b7a5dfd1 100644
--- a/langs/id/tutorials/flow_portal/lesson.json
+++ b/langs/id/tutorials/flow_portal/lesson.json
@@ -7,7 +7,7 @@
       {
           "name": "styles",
 					"type": "css",
-          "content": ".app-container {\n  width: 200px;\n  height: 100px;\n  overflow: hidden;\n}\n\n.popup {\n  position: relative;\n  z-index: 2;\n  background: #ddd;\n  padding: 1rem;\n  min-height: 200px;\n  min-width: 200px;\n}\n\n.popup::after {\n  content: \" \";\n  position: absolute;\n  bottom: 100%;\n  left: 50%;\n  margin-left: -5px;\n  border-width: 5px;\n  border-style: solid;\n  border-color: transparent transparent #ddd transparent;\n}"
+          "content": ".app-container {\n  width: 200px;\n  height: 100px;\n  overflow: hidden;\n}\n\n.popup {\n  color: #333;\n  position: relative;\n  z-index: 2;\n  background: #ddd;\n  padding: 1rem;\n  min-height: 200px;\n  min-width: 200px;\n}\n\n.popup::after {\n  content: \" \";\n  position: absolute;\n  bottom: 100%;\n  left: 50%;\n  margin-left: -5px;\n  border-width: 5px;\n  border-style: solid;\n  border-color: transparent transparent #ddd transparent;\n}"
       }
   ]
 }
diff --git a/langs/id/tutorials/flow_portal/solved.json b/langs/id/tutorials/flow_portal/solved.json
index 2de9f10b..7d341e7f 100644
--- a/langs/id/tutorials/flow_portal/solved.json
+++ b/langs/id/tutorials/flow_portal/solved.json
@@ -7,7 +7,7 @@
       {
           "name": "styles",
 					"type": "css",
-          "content": ".app-container {\n  width: 200px;\n  height: 100px;\n  overflow: hidden;\n}\n\n.popup {\n  position: relative;\n  z-index: 2;\n  background: #ddd;\n  padding: 1rem;\n  min-height: 200px;\n  min-width: 200px;\n}\n\n.popup::after {\n  content: \" \";\n  position: absolute;\n  bottom: 100%;\n  left: 50%;\n  margin-left: -5px;\n  border-width: 5px;\n  border-style: solid;\n  border-color: transparent transparent #ddd transparent;\n}"
+          "content": ".app-container {\n  width: 200px;\n  height: 100px;\n  overflow: hidden;\n}\n\n.popup {\n  color: #333;\n  position: relative;\n  z-index: 2;\n  background: #ddd;\n  padding: 1rem;\n  min-height: 200px;\n  min-width: 200px;\n}\n\n.popup::after {\n  content: \" \";\n  position: absolute;\n  bottom: 100%;\n  left: 50%;\n  margin-left: -5px;\n  border-width: 5px;\n  border-style: solid;\n  border-color: transparent transparent #ddd transparent;\n}"
       }
   ]
 }
diff --git a/langs/it/tutorials/flow_portal/lesson.json b/langs/it/tutorials/flow_portal/lesson.json
index 024fe7fa..b7a5dfd1 100644
--- a/langs/it/tutorials/flow_portal/lesson.json
+++ b/langs/it/tutorials/flow_portal/lesson.json
@@ -7,7 +7,7 @@
       {
           "name": "styles",
 					"type": "css",
-          "content": ".app-container {\n  width: 200px;\n  height: 100px;\n  overflow: hidden;\n}\n\n.popup {\n  position: relative;\n  z-index: 2;\n  background: #ddd;\n  padding: 1rem;\n  min-height: 200px;\n  min-width: 200px;\n}\n\n.popup::after {\n  content: \" \";\n  position: absolute;\n  bottom: 100%;\n  left: 50%;\n  margin-left: -5px;\n  border-width: 5px;\n  border-style: solid;\n  border-color: transparent transparent #ddd transparent;\n}"
+          "content": ".app-container {\n  width: 200px;\n  height: 100px;\n  overflow: hidden;\n}\n\n.popup {\n  color: #333;\n  position: relative;\n  z-index: 2;\n  background: #ddd;\n  padding: 1rem;\n  min-height: 200px;\n  min-width: 200px;\n}\n\n.popup::after {\n  content: \" \";\n  position: absolute;\n  bottom: 100%;\n  left: 50%;\n  margin-left: -5px;\n  border-width: 5px;\n  border-style: solid;\n  border-color: transparent transparent #ddd transparent;\n}"
       }
   ]
 }
diff --git a/langs/it/tutorials/flow_portal/solved.json b/langs/it/tutorials/flow_portal/solved.json
index 2de9f10b..7d341e7f 100644
--- a/langs/it/tutorials/flow_portal/solved.json
+++ b/langs/it/tutorials/flow_portal/solved.json
@@ -7,7 +7,7 @@
       {
           "name": "styles",
 					"type": "css",
-          "content": ".app-container {\n  width: 200px;\n  height: 100px;\n  overflow: hidden;\n}\n\n.popup {\n  position: relative;\n  z-index: 2;\n  background: #ddd;\n  padding: 1rem;\n  min-height: 200px;\n  min-width: 200px;\n}\n\n.popup::after {\n  content: \" \";\n  position: absolute;\n  bottom: 100%;\n  left: 50%;\n  margin-left: -5px;\n  border-width: 5px;\n  border-style: solid;\n  border-color: transparent transparent #ddd transparent;\n}"
+          "content": ".app-container {\n  width: 200px;\n  height: 100px;\n  overflow: hidden;\n}\n\n.popup {\n  color: #333;\n  position: relative;\n  z-index: 2;\n  background: #ddd;\n  padding: 1rem;\n  min-height: 200px;\n  min-width: 200px;\n}\n\n.popup::after {\n  content: \" \";\n  position: absolute;\n  bottom: 100%;\n  left: 50%;\n  margin-left: -5px;\n  border-width: 5px;\n  border-style: solid;\n  border-color: transparent transparent #ddd transparent;\n}"
       }
   ]
 }
diff --git a/langs/ja/tutorials/flow_portal/lesson.json b/langs/ja/tutorials/flow_portal/lesson.json
index 54a93a4e..6eda1409 100644
--- a/langs/ja/tutorials/flow_portal/lesson.json
+++ b/langs/ja/tutorials/flow_portal/lesson.json
@@ -7,7 +7,7 @@
       {
           "name": "styles",
 					"type": "css",
-          "content": ".app-container {\n  width: 200px;\n  height: 100px;\n  overflow: hidden;\n}\n\n.popup {\n  position: relative;\n  z-index: 2;\n  background: #ddd;\n  padding: 1rem;\n  min-height: 200px;\n  min-width: 200px;\n}\n\n.popup::after {\n  content: \" \";\n  position: absolute;\n  bottom: 100%;\n  left: 50%;\n  margin-left: -5px;\n  border-width: 5px;\n  border-style: solid;\n  border-color: transparent transparent #ddd transparent;\n}"
+          "content": ".app-container {\n  width: 200px;\n  height: 100px;\n  overflow: hidden;\n}\n\n.popup {\n  color: #333;\n  position: relative;\n  z-index: 2;\n  background: #ddd;\n  padding: 1rem;\n  min-height: 200px;\n  min-width: 200px;\n}\n\n.popup::after {\n  content: \" \";\n  position: absolute;\n  bottom: 100%;\n  left: 50%;\n  margin-left: -5px;\n  border-width: 5px;\n  border-style: solid;\n  border-color: transparent transparent #ddd transparent;\n}"
       }
   ]
 }
diff --git a/langs/ja/tutorials/flow_portal/solved.json b/langs/ja/tutorials/flow_portal/solved.json
index 4af12f8f..d2b139ea 100644
--- a/langs/ja/tutorials/flow_portal/solved.json
+++ b/langs/ja/tutorials/flow_portal/solved.json
@@ -7,7 +7,7 @@
       {
           "name": "styles",
 					"type": "css",
-          "content": ".app-container {\n  width: 200px;\n  height: 100px;\n  overflow: hidden;\n}\n\n.popup {\n  position: relative;\n  z-index: 2;\n  background: #ddd;\n  padding: 1rem;\n  min-height: 200px;\n  min-width: 200px;\n}\n\n.popup::after {\n  content: \" \";\n  position: absolute;\n  bottom: 100%;\n  left: 50%;\n  margin-left: -5px;\n  border-width: 5px;\n  border-style: solid;\n  border-color: transparent transparent #ddd transparent;\n}"
+          "content": ".app-container {\n  width: 200px;\n  height: 100px;\n  overflow: hidden;\n}\n\n.popup {\n  color: #333;\n  position: relative;\n  z-index: 2;\n  background: #ddd;\n  padding: 1rem;\n  min-height: 200px;\n  min-width: 200px;\n}\n\n.popup::after {\n  content: \" \";\n  position: absolute;\n  bottom: 100%;\n  left: 50%;\n  margin-left: -5px;\n  border-width: 5px;\n  border-style: solid;\n  border-color: transparent transparent #ddd transparent;\n}"
       }
   ]
 }
diff --git a/langs/ko-kr/tutorials/flow_portal/lesson.json b/langs/ko-kr/tutorials/flow_portal/lesson.json
index 024fe7fa..b7a5dfd1 100644
--- a/langs/ko-kr/tutorials/flow_portal/lesson.json
+++ b/langs/ko-kr/tutorials/flow_portal/lesson.json
@@ -7,7 +7,7 @@
       {
           "name": "styles",
 					"type": "css",
-          "content": ".app-container {\n  width: 200px;\n  height: 100px;\n  overflow: hidden;\n}\n\n.popup {\n  position: relative;\n  z-index: 2;\n  background: #ddd;\n  padding: 1rem;\n  min-height: 200px;\n  min-width: 200px;\n}\n\n.popup::after {\n  content: \" \";\n  position: absolute;\n  bottom: 100%;\n  left: 50%;\n  margin-left: -5px;\n  border-width: 5px;\n  border-style: solid;\n  border-color: transparent transparent #ddd transparent;\n}"
+          "content": ".app-container {\n  width: 200px;\n  height: 100px;\n  overflow: hidden;\n}\n\n.popup {\n  color: #333;\n  position: relative;\n  z-index: 2;\n  background: #ddd;\n  padding: 1rem;\n  min-height: 200px;\n  min-width: 200px;\n}\n\n.popup::after {\n  content: \" \";\n  position: absolute;\n  bottom: 100%;\n  left: 50%;\n  margin-left: -5px;\n  border-width: 5px;\n  border-style: solid;\n  border-color: transparent transparent #ddd transparent;\n}"
       }
   ]
 }
diff --git a/langs/ko-kr/tutorials/flow_portal/solved.json b/langs/ko-kr/tutorials/flow_portal/solved.json
index 2de9f10b..7d341e7f 100644
--- a/langs/ko-kr/tutorials/flow_portal/solved.json
+++ b/langs/ko-kr/tutorials/flow_portal/solved.json
@@ -7,7 +7,7 @@
       {
           "name": "styles",
 					"type": "css",
-          "content": ".app-container {\n  width: 200px;\n  height: 100px;\n  overflow: hidden;\n}\n\n.popup {\n  position: relative;\n  z-index: 2;\n  background: #ddd;\n  padding: 1rem;\n  min-height: 200px;\n  min-width: 200px;\n}\n\n.popup::after {\n  content: \" \";\n  position: absolute;\n  bottom: 100%;\n  left: 50%;\n  margin-left: -5px;\n  border-width: 5px;\n  border-style: solid;\n  border-color: transparent transparent #ddd transparent;\n}"
+          "content": ".app-container {\n  width: 200px;\n  height: 100px;\n  overflow: hidden;\n}\n\n.popup {\n  color: #333;\n  position: relative;\n  z-index: 2;\n  background: #ddd;\n  padding: 1rem;\n  min-height: 200px;\n  min-width: 200px;\n}\n\n.popup::after {\n  content: \" \";\n  position: absolute;\n  bottom: 100%;\n  left: 50%;\n  margin-left: -5px;\n  border-width: 5px;\n  border-style: solid;\n  border-color: transparent transparent #ddd transparent;\n}"
       }
   ]
 }
diff --git a/langs/ru/tutorials/flow_portal/lesson.json b/langs/ru/tutorials/flow_portal/lesson.json
index 024fe7fa..b7a5dfd1 100644
--- a/langs/ru/tutorials/flow_portal/lesson.json
+++ b/langs/ru/tutorials/flow_portal/lesson.json
@@ -7,7 +7,7 @@
       {
           "name": "styles",
 					"type": "css",
-          "content": ".app-container {\n  width: 200px;\n  height: 100px;\n  overflow: hidden;\n}\n\n.popup {\n  position: relative;\n  z-index: 2;\n  background: #ddd;\n  padding: 1rem;\n  min-height: 200px;\n  min-width: 200px;\n}\n\n.popup::after {\n  content: \" \";\n  position: absolute;\n  bottom: 100%;\n  left: 50%;\n  margin-left: -5px;\n  border-width: 5px;\n  border-style: solid;\n  border-color: transparent transparent #ddd transparent;\n}"
+          "content": ".app-container {\n  width: 200px;\n  height: 100px;\n  overflow: hidden;\n}\n\n.popup {\n  color: #333;\n  position: relative;\n  z-index: 2;\n  background: #ddd;\n  padding: 1rem;\n  min-height: 200px;\n  min-width: 200px;\n}\n\n.popup::after {\n  content: \" \";\n  position: absolute;\n  bottom: 100%;\n  left: 50%;\n  margin-left: -5px;\n  border-width: 5px;\n  border-style: solid;\n  border-color: transparent transparent #ddd transparent;\n}"
       }
   ]
 }
diff --git a/langs/ru/tutorials/flow_portal/solved.json b/langs/ru/tutorials/flow_portal/solved.json
index 2de9f10b..7d341e7f 100644
--- a/langs/ru/tutorials/flow_portal/solved.json
+++ b/langs/ru/tutorials/flow_portal/solved.json
@@ -7,7 +7,7 @@
       {
           "name": "styles",
 					"type": "css",
-          "content": ".app-container {\n  width: 200px;\n  height: 100px;\n  overflow: hidden;\n}\n\n.popup {\n  position: relative;\n  z-index: 2;\n  background: #ddd;\n  padding: 1rem;\n  min-height: 200px;\n  min-width: 200px;\n}\n\n.popup::after {\n  content: \" \";\n  position: absolute;\n  bottom: 100%;\n  left: 50%;\n  margin-left: -5px;\n  border-width: 5px;\n  border-style: solid;\n  border-color: transparent transparent #ddd transparent;\n}"
+          "content": ".app-container {\n  width: 200px;\n  height: 100px;\n  overflow: hidden;\n}\n\n.popup {\n  color: #333;\n  position: relative;\n  z-index: 2;\n  background: #ddd;\n  padding: 1rem;\n  min-height: 200px;\n  min-width: 200px;\n}\n\n.popup::after {\n  content: \" \";\n  position: absolute;\n  bottom: 100%;\n  left: 50%;\n  margin-left: -5px;\n  border-width: 5px;\n  border-style: solid;\n  border-color: transparent transparent #ddd transparent;\n}"
       }
   ]
 }
diff --git a/langs/zh-cn/tutorials/flow_portal/lesson.json b/langs/zh-cn/tutorials/flow_portal/lesson.json
index 024fe7fa..b7a5dfd1 100644
--- a/langs/zh-cn/tutorials/flow_portal/lesson.json
+++ b/langs/zh-cn/tutorials/flow_portal/lesson.json
@@ -7,7 +7,7 @@
       {
           "name": "styles",
 					"type": "css",
-          "content": ".app-container {\n  width: 200px;\n  height: 100px;\n  overflow: hidden;\n}\n\n.popup {\n  position: relative;\n  z-index: 2;\n  background: #ddd;\n  padding: 1rem;\n  min-height: 200px;\n  min-width: 200px;\n}\n\n.popup::after {\n  content: \" \";\n  position: absolute;\n  bottom: 100%;\n  left: 50%;\n  margin-left: -5px;\n  border-width: 5px;\n  border-style: solid;\n  border-color: transparent transparent #ddd transparent;\n}"
+          "content": ".app-container {\n  width: 200px;\n  height: 100px;\n  overflow: hidden;\n}\n\n.popup {\n  color: #333;\n  position: relative;\n  z-index: 2;\n  background: #ddd;\n  padding: 1rem;\n  min-height: 200px;\n  min-width: 200px;\n}\n\n.popup::after {\n  content: \" \";\n  position: absolute;\n  bottom: 100%;\n  left: 50%;\n  margin-left: -5px;\n  border-width: 5px;\n  border-style: solid;\n  border-color: transparent transparent #ddd transparent;\n}"
       }
   ]
 }
diff --git a/langs/zh-cn/tutorials/flow_portal/solved.json b/langs/zh-cn/tutorials/flow_portal/solved.json
index 2de9f10b..7d341e7f 100644
--- a/langs/zh-cn/tutorials/flow_portal/solved.json
+++ b/langs/zh-cn/tutorials/flow_portal/solved.json
@@ -7,7 +7,7 @@
       {
           "name": "styles",
 					"type": "css",
-          "content": ".app-container {\n  width: 200px;\n  height: 100px;\n  overflow: hidden;\n}\n\n.popup {\n  position: relative;\n  z-index: 2;\n  background: #ddd;\n  padding: 1rem;\n  min-height: 200px;\n  min-width: 200px;\n}\n\n.popup::after {\n  content: \" \";\n  position: absolute;\n  bottom: 100%;\n  left: 50%;\n  margin-left: -5px;\n  border-width: 5px;\n  border-style: solid;\n  border-color: transparent transparent #ddd transparent;\n}"
+          "content": ".app-container {\n  width: 200px;\n  height: 100px;\n  overflow: hidden;\n}\n\n.popup {\n  color: #333;\n  position: relative;\n  z-index: 2;\n  background: #ddd;\n  padding: 1rem;\n  min-height: 200px;\n  min-width: 200px;\n}\n\n.popup::after {\n  content: \" \";\n  position: absolute;\n  bottom: 100%;\n  left: 50%;\n  margin-left: -5px;\n  border-width: 5px;\n  border-style: solid;\n  border-color: transparent transparent #ddd transparent;\n}"
       }
   ]
 }