F1 thick and thin lines misuse

Summary

A "don'ts" page cataloguing twelve incorrect uses of the line device on a four-column, three-row grid of white cards, each ruled out with a single red diagonal slash.

Visual description

Warm off-white background, thin top rule with the "Visual Identity / Graphic Devices" kicker, "Thick and thin lines" title, outlined "Misuse" subtitle and "138" at right. A short left column states the line is a functional device, not decoration, and lists things to avoid. The body is a 4x3 grid of white rounded cards, each showing a black line-device example with a problem and a bold caption above it ("Don't end a line too abruptly", "Don't end lines in 45 angles", "Don't use short lines", "Don't use inconsistent corners", "Don't overcomplicate", "Don't mix cup directions", "Don't combine curved and sharp corners in one element", "Don't add unnecessary detail", "Don't use multiple lines", "Don't make the curve too large"). Every card is struck through corner to corner with a thin red diagonal line marking it as forbidden; a few include small grey explanatory notes.

Key takeaway

The classic misuse grid done cleanly: one error per card, a plain-language "Don't" caption, and a single red diagonal as the universal "no". Keeping each wrong example minimal makes the specific mistake unmistakable.

Reuse notes

The standard "what not to do" page for any brand element, and a direct counterpart to a usage or specimen page. The red-slash card grid is endlessly reusable for logos, type, color, and layout don'ts. Keep captions blunt and examples isolated so each rule lands.