Update Headline rendering

assets/style.css

@@ -24,13 +24,10 @@
     --link-hover: #d6d24d;
     --danger: #c40141;
     --danger-hover: #d03467;
-    /* Translucent scrim for badges/overlays sitting on top of media. */
     --overlay: rgba(0, 0, 0, 0.55);
 
     --border: 1px solid var(--secondary);
     --border-dashed: 1px dashed var(--secondary);
-    /* Subtle vertical rail for tree-nesting depth — quieter than --border so
-       it reads as a guide, not a divider. */
     --border-guide: 1px solid var(--bg-panel-hover);
 
     --space-1: 0.25rem;
@@ -209,6 +206,7 @@ footer {
 .btn::after { content: "]"; color: var(--secondary); }
 .btn:hover { color: var(--primary-hover); }
 .btn-small { font-size: 0.8rem; font-weight: normal; vertical-align: middle; }
+.btn-float {float: right;}
 .btn-tool { padding: 0 0.15rem; }
 .btn-block {
     display: flex;
@@ -268,7 +266,7 @@ footer {
 .content h4, .content h5, .content h6,
 main > h2 {
     color: var(--text);
-    margin: 1.25rem 0 var(--space-2);
+    margin: var(--space-5) 0 var(--space-2);
     line-height: 1.3;
 }
 .content h1 {
@@ -276,7 +274,12 @@ main > h2 {
     border-bottom: var(--border-dashed);
     padding-bottom: var(--space-1);
 }
-.content h2, main > h2 { font-size: 1.4rem; }
+.content h1:first-child { margin-top: 0; }
+.content h2, main > h2 {
+    font-size: 1.4rem;
+    border-bottom: var(--border-dashed);
+    padding-bottom: var(--space-1);
+}
 .content h3 { font-size: 1.15rem; }
 .content p { margin: var(--space-3) 0; }
 .content ul, .content ol { margin: var(--space-3) 0 var(--space-3) var(--space-5); }
@@ -344,14 +347,6 @@ main > h2 {
     line-height: 1.4;
 }
 
-a.heading-anchor {
-    color: var(--text-muted);
-    margin-right: 0.4em;
-    font-weight: normal;
-    text-decoration: none;
-}
-a.heading-anchor:hover { color: var(--primary-hover); }
-
 /* === Data tables ===
    Shared style for the file listing, search-suggestion dropdown, and
    markdown content tables. .data-table-grid adds per-cell borders + a