diff --git a/styles.css b/styles.css
index b9a5329..d7eda23 100644
--- a/styles.css
+++ b/styles.css
@@ -135,6 +135,8 @@ h1 {
     color: var(--light-cyan);
 
     float: left;
+
+    border-bottom-left-radius: 0;
 }
 
 .message-content.theirs h3 {
@@ -154,6 +156,8 @@ h1 {
 
     right: 0;
     margin-bottom: 0.5em;
+
+    border-bottom-right-radius: 0;
 }
 
 .ours .message-text {