chafa is the resolution I actually wanted

Makefile

@@ -1,5 +1,11 @@
 .PHONY: help serve size validate tidy video video-list video-frames video-bundle clean
 
+# ASCII render resolution (override on the command line):
+#   make video NAME=nature1 SIZE=160x48 SCALE=640
+SIZE  ?= 80x24
+SCALE ?= 320
+FPS   ?= 12
+
 help: ## Show this help
 	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | \
 	  awk 'BEGIN {FS = ":.*?## "}; {printf "  \033[36m%-12s\033[0m %s\n", $$1, $$2}'
@@ -49,11 +55,11 @@ video-frames: ## Extract PNG frames from video/<NAME>.mp4 and chafa each to ASCI
 	  { echo "ffmpeg not found. Run via: nix develop -c make video-frames NAME=$(NAME)"; exit 1; }
 	@command -v chafa >/dev/null 2>&1 || \
 	  { echo "chafa not found. Run via: nix develop -c make video-frames NAME=$(NAME)"; exit 1; }
-	@echo "  extracting frames at 12 fps from video/$(NAME).mp4"
-	@ffmpeg -y -loglevel error -i video/$(NAME).mp4 -vf "fps=12,scale=320:-1" build/$(NAME)/frame-%03d.png
-	@echo "  chafa: 80x24 ascii per frame"
+	@echo "  extracting frames at $(FPS) fps from video/$(NAME).mp4"
+	@ffmpeg -y -loglevel error -i video/$(NAME).mp4 -vf "fps=$(FPS),scale=$(SCALE):-1" build/$(NAME)/frame-%03d.png
+	@echo "  chafa: $(SIZE) ascii per frame"
 	@for f in build/$(NAME)/frame-*.png; do \
-	  chafa -f symbols -c none -s 80x24 --symbols ascii --animate off "$$f" > "$${f%.png}.txt"; \
+	  chafa -f symbols -c none -s $(SIZE) --symbols ascii --animate off "$$f" > "$${f%.png}.txt"; \
 	done
 	@echo "  rendered $$(($$(ls build/$(NAME)/frame-*.png | wc -l))) PNG + ASCII frames in build/$(NAME)/"
 

static/css/ascii.css

@@ -28,8 +28,8 @@
   margin: 0;
   padding: 0;
   font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
-  font-size: max(2.1vw, 4.17vh);
-  font-size: max(2.1vw, 4.17svh);
+  font-size: max(0.35vw, 0.695vh);
+  font-size: max(0.35vw, 0.695svh);
   line-height: 1.0;
   letter-spacing: 0;
   color: #f4a26b;