Remove sticky positioning from sidebar, add explicit display:block

Safari computes display:none on the aside element. Force display:block
and drop position:sticky entirely — sidebar just sits at content top.

Author: pubino

assets/css/site.css

@@ -124,7 +124,7 @@ section:last-of-type{margin-bottom:0}
 .newsletter-page{display:grid;grid-template-columns:1fr 250px;gap:40px}
 .newsletter-main{min-width:0}
 .newsletter-main h2{margin-top:0}
-.newsletter-sidebar{position:-webkit-sticky;position:sticky;top:100px}
+.newsletter-sidebar{display:block}
 .newsletter-sidebar h3{margin:24px 0 12px;font-size:1rem;color:#666}
 .newsletter-sidebar .year-list{list-style:none;margin:0;padding:0}
 .newsletter-sidebar .year-list li{margin:0 0 8px}
@@ -133,7 +133,6 @@ section:last-of-type{margin-bottom:0}
 @media (max-width:768px){
 .newsletter-page{grid-template-columns:1fr;gap:30px}
 .newsletter-sidebar-col{order:-1}
-.newsletter-sidebar{position:static}
 }
 .newsletter-issue header h2{margin:0 0 5px;font-size:2rem;font-weight:600}
 .newsletter-issue .meta{color:#777;margin:0 0 30px;font-size:.9rem}