Update tutorial descriptions

Author: nikoscham

index.html

@@ -212,9 +212,8 @@ <h2 id="howtousefeascript"><a name="Getting Started"></a>How to Use FEAScript</h
     <ul>
       <li>
         <strong>JavaScript API (FEAScript Core):</strong> For developers comfortable with coding, the
-        JavaScript API provides full programmatic control. It runs in three environments: in the browser with
-        a simple HTML page, via Node.js for server-side applications, or with online interactive notebooks
-        (e.g.
+        JavaScript API provides full programmatic control. It can run in three environments: in a browser
+        using a simple HTML page, on a server via Node.js, or within interactive JavaScript playgrounds (e.g.
         <a href="https://codepen.io/"
           >CodePen<img
             src="https://upload.wikimedia.org/wikipedia/commons/4/44/Icon_External_Link.svg"
@@ -486,13 +485,9 @@ <h2 id="features"><a name="Features"></a>Features</h2>
             >)
           </li>
           <li>
-            No-code interface with
-            <a href="https://platform.feascript.com">FEAScript Platform</a>
-            visual editor
-          </li>
-          <li>
-            Node.js runtime (<a href="https://www.npmjs.com/package/feascript"
-              >npm<img
+            Interactive JavaScript playgrounds (e.g.
+            <a href="https://codepen.io/FEAScript"
+              >CodePen<img
                 src="https://upload.wikimedia.org/wikipedia/commons/4/44/Icon_External_Link.svg"
                 alt="External Link Icon"
                 style="
@@ -501,13 +496,11 @@ <h2 id="features"><a name="Features"></a>Features</h2>
                   vertical-align: middle;
                   margin-left: 2px;
                   margin-bottom: 4px;
-                " /></a
-            >)
-          </li>
-          <li>
-            Online notebooks integration (e.g.
-            <a href="https://codepen.io/FEAScript"
-              >CodePen<img
+                "
+            /></a>
+            and
+            <a href="https://hub.scribbler.live/portfolio/#!nikoscham/FEAScript-Scribbler-examples"
+              >Scribbler<img
                 src="https://upload.wikimedia.org/wikipedia/commons/4/44/Icon_External_Link.svg"
                 alt="External Link Icon"
                 style="
@@ -516,11 +509,17 @@ <h2 id="features"><a name="Features"></a>Features</h2>
                   vertical-align: middle;
                   margin-left: 2px;
                   margin-bottom: 4px;
-                "
-            /></a>
-            and
-            <a href="https://hub.scribbler.live/portfolio/#!nikoscham/FEAScript-Scribbler-examples"
-              >Scribbler<img
+                " /></a
+            >)
+          </li>
+          <li>
+            No-code interface with
+            <a href="https://platform.feascript.com">FEAScript Platform</a>
+            visual editor
+          </li>
+          <li>
+            Node.js runtime (<a href="https://www.npmjs.com/package/feascript"
+              >npm<img
                 src="https://upload.wikimedia.org/wikipedia/commons/4/44/Icon_External_Link.svg"
                 alt="External Link Icon"
                 style="
@@ -541,7 +540,7 @@ <h2 id="tutorials"><a name="Tutorials"></a>Tutorials</h2>
     <p>
       Below you can explore tutorials that provide a step-by-step introduction to FEAScript. These tutorials
       show you how to use FEAScript's JavaScript API directly, integrating finite element simulations into
-      your own websites and applications, or how to use it in interactive online environments such as
+      your own websites and applications, or how to use it in interactive JavaScript playgrounds such as
       <a href="https://codepen.io/FEAScript"
         >CodePen<img
           src="https://upload.wikimedia.org/wikipedia/commons/4/44/Icon_External_Link.svg"