Site · Logo: the letter E in iso blocks, in the header, the favicon, the touch icon and the OG image

One geometry in src/iso/mark.ts, drawn by the engine the miniatures use. The favicon follows the system's mode; scripts/favicon.mjs takes its colors from styles.css. Below 768px the header shows the mark alone, its word kept as the link's name.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tasks/reviews.md

@@ -377,3 +377,8 @@
 | S8 | 1 | FAIL | the card click matched names by substring; the unknown id could be a real one |
 | S8 | 2 | PASS | |
 | S9 | 1 | PASS | |
+| L1 | 1 | PASS | |
+| L2 | 1 | PASS | |
+| L3 | 1 | PASS | |
+| L4 | 1 | PASS | |
+| L5 | 1 | PASS | |