diff --git a/beam.php b/beam.php
index eb33268..828fb9a 100755
--- a/beam.php
+++ b/beam.php
@@ -1,7 +1,7 @@
 <?php
 
 include("header.html");
-echo "<center>";
+echo "<main class=\"text-center\">";
 
 if (empty($_POST["desired_filename"]))
 {
@@ -40,44 +40,48 @@ $beaming_permitted = 1;
 
 if (file_exists($dest_file))
 {
-	echo "<p>WE'RE GETTING SOME INTERFERENCE</p>";
-	echo "<p>PLEASE USE A DIFFERENT COIN-NAME</p>";
+	echo "<p class=\"uppercase\">We're getting some interference</p>";
+	echo "<p class=\"uppercase\">Please use a different coin-name</p>";
 	$beaming_permitted = 0;	
 }
 elseif ($_FILES["fileToUpload"]["size"] > 50000000)
 {
-	echo "<p>THIS COIN WILL BE UP FOR AT LEAST THREE MONTHS</p>";
-	echo "<p>7 MOONS IN THE ORDINARY SABBATICAL CYCLE</p>";
-	echo "<p>AFTER THAT, IT *MAY* BE DE-ATOMIZED</p>>";
+	echo "<p class=\"uppercase\">This coin will be up for at least three months</p>";
+	echo "<p class=\"uppercase\">7 moons in the ordinary sabbatical cycle</p>";
+	echo "<p class=\"uppercase\">After that, it *may* be de-atomized</p>";
 }
 elseif ($_FILES["fileToUpload"]["size"] < 25000000)
 {
-	echo "<p>THANK YOU FOR FEEDING ME</p>";
-	echo "<p>YOUR COIN IS IN SAFE HANDS</p>";
-	echo "<p>IT WILL NOT BE DE-ATOMIZED FOR AT LEAST A YEAR</p>";
+	echo "<p class=\"uppercase\">Thank you for feeding me</p>";
+	echo "<p class=\"uppercase\">Your coin is in safe hands</p>";
+	echo "<p class=\"uppercase\">It will not be de-atomized for at least a year</p>";
 }
 
 
 if ($beaming_permitted == 0) {
-	echo "<img src=../../res/img/coinfire_big.png>";
-	echo "<p>sorry <\\3</p>";
 	echo "<title>COIN ON FIRE</title>";
+	echo "<img alt=\"A big coin in bloody flames.\" src=../../res/img/coinfire_big.png>";
+	echo "<p>sorry <\\3</p>";
 }
 else  {
 	if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"],$dest_file)) {
-		echo "<img src=../../res/img/coininserted_big.png>";
-		echo "<p>IT IS <a href=" . $dest_file . ">HERE</a></p>";
 		echo "<title>COIN INSERTED <3</title>";
+		echo "<img alt=\"A coin lovingly inserted to a coin-slot\" src=../../res/img/coininserted_big.png>";
+		echo "<p class=\"uppercase\">It is <a href=" . $dest_file . ">here</a></p>";
 	}
 	else
 	{
-		echo "<img src=../../res/img/coinfire_big.png>";
-		echo "<p>...</p>";
-		echo "<p>THAT WAS WEIRD, SOMETHING WENT WRONG. TRY AGAIN.</p>";
 		echo "<title>COIN ON FIRE</title>";
+		echo "<img alt=\"Ouch, that coin is on fire. Literally.\" src=../../res/img/coinfire_big.png>";
+		echo "<p>...</p>";
+		echo "<p class=\"uppercase\">That was weird, something went wrong. Try again.</p>";
 	}
 }
 
-include("footer.html");
-
+?>
+
+</main>
+
+<?php
+include("footer.html");
 ?>
diff --git a/footer.html b/footer.html
index 135b61c..e385796 100644
--- a/footer.html
+++ b/footer.html
@@ -1,4 +1,4 @@
-<center>
+<main class="text-center">
 <footer>
 	No data will be recorded on who inserts what coin-- all I'll get is a timestamp.
 </footer>
@@ -6,7 +6,7 @@
 <p>
 	<a href="https://notabug.org/jadedctrl/insert-coin">source juice</a>
 </p>
-</center>
+</main>
 
 </body>
 </html>
diff --git a/header.html b/header.html
index 7a786cf..f2485ea 100644
--- a/header.html
+++ b/header.html
@@ -1,4 +1,5 @@
-<html>
+<!DOCTYPE html>
+<html lang="en">
 
 <head>
 <!-- THIS ENTIRE FILE IS UNDER THE AGPLv3+
diff --git a/index.php b/index.php
index 71592e0..9edcdc6 100644
--- a/index.php
+++ b/index.php
@@ -1,15 +1,17 @@
 <?php include("header.html");?>
 
-<center style="margin-top: 30px">
+<main class="text-center" style="margin-top: 30px">
 <form action="beam.php" method="post" enctype="multipart/form-data">
 	<p>
         	<input type="text" placeholder="Filename (Blank for uploaded name)" 
 			name="desired_filename" id="desired_filename" style="width: 400px;">
 	</p>
-	<input type="file" name="fileToUpload" id="fileToUpload">
+	<input type="file" name="fileToUpload" id="fileToUpload" style="margin: 0 auto">
 	<input style="margin-top: 10px; margin-bottom: 10px" type="submit" value="INSERT COIN" name="submit">
 </form>
 
-<img src="../../res/img/insertcoin_big.png">
+<img alt="Picture of a pretty big, yellow labour-token." src="res/img/insertcoin_big.png">
+
+</main>
 
 <?php include("footer.html");?>
diff --git a/res/style.css b/res/style.css
index edc8e87..4d943a2 100644
--- a/res/style.css
+++ b/res/style.css
@@ -18,3 +18,6 @@ body {
 	color: #33FF5C;
 }
 
+.uppercase {
+	text-transform: uppercase;
+}
