Fix page navigation buttons

Fixes panr/hugo-theme-terminal#81

source/css/pagination.css

@@ -43,14 +43,15 @@
 .button {
   position: relative;
   display: inline-flex;
+  flex: 1;
   align-items: center;
   justify-content: center;
   font-size: 1rem;
   border-radius: 8px;
-  max-width: 40%;
   padding: 0;
   cursor: pointer;
   appearance: none;
+  overflow: hidden;
 
   + .button {
     margin-left: 10px;