Fix · Bloom section heads left-align (hero stays centered) + drop Newsprint double-rule

- Bloom: .section__head was text-align: center with .section-label justify-content: center and .section__title margin-inline: auto — every section read as centered-everything (the AI fingerprint). Flipped to text-align: left, justify-content: flex-start, margin-inline: 0. Hero (.hero--marquee) stays centered via its own rules; the atmospheric glow does the centering work without needing every section head to repeat it. Tag stays above the title in the same column (still passes gate 66).
- Newsprint: removed border-top: 3px double var(--color-ink) from .section__head — the double rule above each section tag was reading as decorative noise on a layout that already has a strong 1 px bottom border. Single bottom border kept.

site/css/components.css

@@ -3555,18 +3555,21 @@ html[data-theme="bloom"] body {
   justify-self: center;
 }
 
-/* Bloom's section heads — also centered for atmosphere. */
+/* Bloom — left-aligned section heads (hero stays centered above). The
+   atmospheric glow does the centering work — re-centering section heads
+   reads as a templated AI fingerprint. Tag stays above the title in the
+   same column (matches slop-test gate 66). */
 [data-theme="bloom"] .section__head {
   grid-template-columns: 1fr;
-  text-align: center;
+  text-align: left;
   border-bottom: 0;
   padding-bottom: var(--space-md);
 }
 [data-theme="bloom"] .section-label {
-  justify-content: center;
+  justify-content: flex-start;
 }
 [data-theme="bloom"] .section__title {
-  margin-inline: auto;
+  margin-inline: 0;
   max-width: 26ch;
 }
 

site/css/sections.css

@@ -1383,7 +1383,6 @@
 }
 [data-theme="newsprint"] .section__head {
   grid-template-columns: 1fr;
-  border-top: 3px double var(--color-ink);
   border-bottom: 1px solid var(--color-ink);
   padding-block: 0.5rem;
   align-items: baseline;