minor css changes

Author: jxmot

httpcodes.html

@@ -23,7 +23,7 @@
 table {
     width: 70%; 
     border-collapse: collapse; 
-    margin: auto;
+    margin: auto auto 15rem auto;
     border: solid 1px black;
 }
 
@@ -92,7 +92,7 @@
     box-shadow: 0 5px grey;
     position: sticky;
     top: 0;
-    width: 100vw;
+    width: 100%;
     display: inline-block;
     margin: 0;
 }