make usercard sticky on post

sass/style.scss

@@ -144,15 +144,20 @@ body {
 
 .usercard {
   grid-area: usercard;
-  display: flex;
-  flex-direction: column;
-  align-items: center;
   padding: 20px 10px;
   border: 4px outset $light;
   background-color: $dark_bg;
   border-right: solid 2px;
 }
 
+.usercard-inner {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  top: 10px;
+  position: sticky;
+}
+
 .post-content-container {
   display: grid;
   grid-template-columns: 1fr;
@@ -297,7 +302,7 @@ blockquote {
   width: 90%;
   height: 90%;
   object-fit: contain;
-  padding-bottom: 10px;
+  margin-bottom: 10px;
 }
 
 .username-link {