ui: Headings kleiner + Library als Archiv-Zwilling (Sidebar weg)

- section-title 2.6→1.9rem max, 800→700; single-header h1 3→2.2rem max, 800→700;
  single-summary 1.4→1.2rem. Ruhiger, redaktioneller, site-weit.
- Library raus aus der zweispaltigen Sonderform: Übersicht = .atlas (gruppiert,
  wie Archiv-Root), Eintrag = .single (wie Essay) mit Quellen + Fuss
  (Gruppe · weitere Einträge · bearbeiten). library-nav-Partial entfernt.
- Voll CI-konform: Archiv und Library teilen jetzt dasselbe Gerüst.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

assets/css/custom.css

@@ -719,36 +719,15 @@ a.byline-author:hover, a.journal-author:hover { color: var(--accent); }
 .dialog-hint { font-size: var(--font-size-small); color: var(--color-text-muted); align-self: center; opacity: 0.7; }
 .dialog-spacer { flex: 1; }
 
-/* ── Library/Wiki-Bereich: zentrierter Section-Header (wie Archiv) darüber,
-   zweispaltige Fläche (Seitenleiste + Inhalt) darunter. ── */
-.wiki { display: grid; grid-template-columns: 200px 1fr; gap: 2.6em; align-items: start; }
-@media (max-width: 760px) { .wiki { grid-template-columns: 1fr; gap: 1.4em; } .wiki-side { position: static; } }
-.wiki-side { position: sticky; top: 1em; align-self: start; }
-.wiki-nav { display: flex; flex-direction: column; gap: 0.35em; font-size: var(--font-size-small); }
-.wiki-nav-home { text-decoration: none; color: var(--color-text-primary); font-weight: 600; }
-.wiki-nav-home:hover { color: var(--accent); }
-.wiki-nav-home.is-current { color: var(--accent); }
-.wiki-filter { width: 100%; padding: 0.4em 0.7em; margin: 0.3em 0 0.4em; font: inherit; font-size: var(--font-size-small);
-  border: 1px solid var(--color-border); border-radius: 8px; background: var(--color-bg-primary); }
-.wiki-filter:focus { outline: none; border-color: var(--accent); }
-.wiki-nav-title { text-transform: uppercase; letter-spacing: 0.1em; font-size: 0.7rem; color: var(--color-text-muted); margin: 0.8em 0 0.25em; }
-.wiki-nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.1em; }
-.wiki-nav li a { display: block; text-decoration: none; color: var(--color-text-muted);
-  padding: 0.18em 0 0.18em 0.7em; border-left: 2px solid transparent; }
-.wiki-nav li a:hover { color: var(--accent); }
-.wiki-nav li a.is-current { color: var(--color-text-primary); font-weight: 600; border-left-color: var(--accent); }
-
-.wiki-page { min-width: 0; }
-.wiki-index { margin-top: var(--spacing-md); }
-.wiki-group { margin-bottom: var(--spacing-md); }
-.wiki-group h2 { font-family: var(--font-family-serif); font-size: 1.1rem; margin: 0 0 0.4em; }
-.wiki-group ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.4em; }
-.wiki-group li a { font-weight: 600; text-decoration: none; }
-.wiki-group li a:hover { color: var(--accent); }
-.wiki-foot { margin-top: var(--spacing-lg); padding-top: var(--spacing-sm); border-top: 1px solid var(--color-border);
-  display: flex; gap: 1.2em; flex-wrap: wrap; font-size: var(--font-size-small); color: var(--color-text-muted); }
-.wiki-foot a { color: var(--color-text-muted); text-decoration: none; }
-.wiki-foot a:hover { color: var(--accent); }
+/* ── Library: gleiches Gerüst wie Archiv (Übersicht = .atlas, Eintrag = .single).
+   Eintrags-Fuss: Gruppe + weitere Einträge + bearbeiten-Link. ── */
+.entry-foot { margin-top: var(--spacing-lg); padding-top: var(--spacing-sm); border-top: 1px solid var(--color-border);
+  display: flex; gap: 0.6em 1.2em; flex-wrap: wrap; align-items: baseline; font-size: var(--font-size-small); color: var(--color-text-muted); }
+.entry-foot .entry-more { flex: 1; min-width: 14em; }
+.entry-foot .entry-more a { color: var(--accent); text-decoration: none; }
+.entry-foot .entry-more a:hover { text-decoration: underline; text-underline-offset: 0.2em; }
+.entry-foot a { color: var(--color-text-muted); text-decoration: none; }
+.entry-foot a:hover { color: var(--accent); }
 
 /* ── Software-Landing: Werkzeuge getrennt von Texten ── */
 .software-h { font-family: var(--font-family-serif); margin: var(--spacing-md) 0 var(--spacing-sm); }
@@ -1124,10 +1103,10 @@ a.byline-author:hover, a.journal-author:hover { color: var(--accent); }
 }
 .section-title {
   font-family: var(--font-family-serif);
-  font-size: clamp(1.9rem, 4vw, 2.6rem);
-  font-weight: 800;
-  letter-spacing: -0.026em;
-  line-height: 1.05;
+  font-size: clamp(1.5rem, 2.6vw, 1.9rem);
+  font-weight: 700;
+  letter-spacing: -0.012em;
+  line-height: 1.1;
   margin: 0 0 0.4rem;
 }
 .section-description {
@@ -1243,17 +1222,17 @@ a.byline-author:hover, a.journal-author:hover { color: var(--accent); }
 }
 .single-header h1 {
   font-family: var(--font-family-serif);
-  font-size: clamp(2.1rem, 4.6vw, 3rem);
-  font-weight: 800;
-  letter-spacing: -0.028em;
-  line-height: 1.05;
+  font-size: clamp(1.7rem, 3vw, 2.2rem);
+  font-weight: 700;
+  letter-spacing: -0.015em;
+  line-height: 1.12;
   margin: 0 0 var(--spacing-sm);
 }
 .single-summary {
   font-family: var(--font-family-serif);
   font-style: normal;
-  font-size: 1.4rem;
-  line-height: 1.4;
+  font-size: 1.2rem;
+  line-height: 1.45;
   color: var(--color-text-primary);
   margin: 0 0 var(--spacing-md);   /* breathing room before byline */
   max-width: 55ch;