Refactor font-size values in style.scss to use relative units (em) for better scalability

.vscode/ftp-kr.sync.cache.json

@@ -101,8 +101,8 @@
           },
           "class.Tasks.php": {
             "type": "-",
-            "size": 17944,
-            "lmtime": 1764184406249,
+            "size": 18207,
+            "lmtime": 1764203726003,
             "modified": false
           },
           "class.Users.php": {
@@ -146,13 +146,13 @@
           "class.Projects.php": {
             "type": "-",
             "size": 27334,
-            "lmtime": 1745261880238,
+            "lmtime": 1764203265163,
             "modified": false
           },
           "class.Tasks.php": {
             "type": "-",
-            "size": 21487,
-            "lmtime": 1764109249950,
+            "size": 21638,
+            "lmtime": 1764203740414,
             "modified": false
           },
           "class.Users.php": {
@@ -507,8 +507,8 @@
           },
           "main_view.php": {
             "type": "-",
-            "size": 34412,
-            "lmtime": 1764112957755,
+            "size": 34861,
+            "lmtime": 1764203691866,
             "modified": false
           },
           "task_edit.php": {