diff --git a/index.html b/index.html
index 508a111..5ad7ae3 100644
--- a/index.html
+++ b/index.html
@@ -16,7 +16,7 @@
 	</header>
 	<main>
 		<h2>Hello.</h2>
-		<p>
+		<p class="container">
 			My name is Andrzej, and until the pandemic I was an English teacher. If you're reading this, you
 			most
 			likely followed a link here from my CV. I thought this page would be the best way to demonstrate
@@ -25,7 +25,7 @@
 		</p>
 		<section>
 			<h1>The website you are currently reading...</h1>
-			<ul>
+			<ul class="container">
 				<li><b>… is hosted on bespoke hardware.</b> A mini-pc in my living room, to
 					be precise!</li>
 				<li><b>… has correctly managed security certificates, scoring an 'A' grade on <a
@@ -50,12 +50,12 @@
 			</ul>
 		</section>
 		<section>
-			<h2>Certifications</h2>
+			<h1>Certifications</h1>
 			<figure>
 				<figcaption>
 					Freecodecamp certificates
 				</figcaption>
-				<ul class="link-list">
+				<ul class="link-list container">
 					<li>
 						<a
 							href="https://www.freecodecamp.org/certification/fcc60e22726-0a94-4738-8702-3e216d14fdb2/front-end-development-libraries">Front
@@ -77,7 +77,7 @@
 				<figcaption>
 					IBM certificates
 				</figcaption>
-				<ul class="link-list">
+				<ul class="link-list container">
 					<li>
 						<a
 							href="https://courses.edx.org/certificates/0ac958dec5424747b59860843844bd22">Introduction
@@ -95,19 +95,18 @@
 
 			<figure>
 				<figcaption>
-					<h2>Projects</h2>
+					<h1>Projects</h1>
 				</figcaption>
 				<ul class="link-list">
-					<li>
+					<li class="container">
 						<h3>Subman</h3>
 						<p>A self-hosted literary submission management system comprising a
-							Nodejs
-							backend server and React front end.
+							Nodejs back-end server and React front end.
 						</p>
 						<a>demo</a>
 						<a>source</a>
 					</li>
-					<li>
+					<li class="container">
 
 						<h3>Micro365</h3>
 						<p>
@@ -117,15 +116,14 @@
 						<a>demo</a>
 						<a>source</a>
 					</li>
-					<li>
+					<li class="container">
 
-						<h3>PromptBot</h3>
+						<h3>Calculator</h3>
 						<p>
-							A bot written in nodejs that delivers single-word writing
-							prompts from a database.
+							A simple calculator app written in React.
 						</p>
-						<a>demo</a>
-						<a>source</a>
+						<a href="https://demos.ajstepien.xyz/calculator/">demo</a>
+						<a href="https://projects.ajstepien.xyz/andrzej/calculator">source</a>
 					</li>
 				</ul>
 			</figure>