diff --git a/assets/style.scss b/assets/style.scss
index db2af0e..8162b01 100644
--- a/assets/style.scss
+++ b/assets/style.scss
@@ -33,7 +33,7 @@ body {
   display: grid;
   font-family: system-ui, sans-serif;
   font-size: 1.2em;
-  line-height: 1.8;
+  line-height: 1.7;
   margin: 0;
 }
 
@@ -46,6 +46,11 @@ a {
   &:hover { text-decoration-color: var(--text); }
 }
 
+center {
+  margin: 19.2px 0;
+  text-align: center;
+}
+
 code {
   border-radius: 4px;
   background: var(--border);
@@ -67,8 +72,8 @@ p img {
 }
 
 hr {
-  border-color: var(--text);
-  color: var(--text);
+  border-color: var(--border);
+  color: var(--border);
   margin: 60px 0;
 }