css improvements

Author: kalwalt

tools/FeatureSet-Display/index.html

@@ -4,7 +4,7 @@
 subtitle: Display your .iset .fset .fset3 files
 content_width: is-full
 ---
-<div class="container">
+<div class="container has-text-centered">
   <h1>FeatureSET-Display</h1>
   <p>Displaying .iset .fset .fset3 files</p>
   <p>Feature points: light green circles</p>

tools/index.html

@@ -6,11 +6,11 @@
 image: ./resources/webarkit-logo-social.jpg
 permalink: /tools/
 ---
-<div>
+<div class="section">
   <a href="/tools/NFT_Marker_Creator/"><h2>NFT Marker Creator</h2></a>
   <p>A Tool to Create NFT (Natural Feature Tracking) markers, used by ARnft, JsartoolkitNFT, Jsartoolkit5, AR.js</p>
 </div>
-<div>
+<div class="section">
   <a href="/tools/FeatureSet-Display/"><h2>FeatureSet Display</h2></a>
   <p>A Tool to Display NFT (Natural Feature Tracking) markers, used by ARnft, JsartoolkitNFT, Jsartoolkit5, AR.js</p>
 </div>