fix(wc): keep colophon scale at designed sizes in dense density master
The density-tier rules re-target every <p> in the slide (morkdeck-slide[data-density="dense"] p, specificity 0,1,2) to shrink running body for content-heavy slides. The colophon's three <p> elements (speaker, byline, context) sat at single-class rules (specificity 0,1,1), so the density override won and the colophon collapsed to size-code regardless of which colophon-* size token the extract pass introduced. All three lines rendered at 13.52px instead of resolving to 16.22 / 11.49 / 10.14 in dense mode, flattening the identity-moment hierarchy of name > byline > metadata. Upgrade the three selectors to compound (.colophon .colophon-*) at specificity 0,2,1, the same trick the colophon-socials li margin reset already uses to beat density. The colophon scale now resists density auto-fit on title and outro slides. The redundant compound margin-reset block is folded away (each upgraded rule already carries margin: 0). Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>