[Darkhorse7stars]

On live hanzo.ai/login at 1440px, the providers' row ran 3px past the email field. The pair's columns were 1fr 1fr, and a bare 1fr never shrinks below its label. "Continue with Google" needs 197px of a 195px half, so the pair stood 402px against the field's 398, and GitHub's right edge was 3px past the column's.

• SIGNIN_STYLE: the pair is repeat(2,minmax(0,1fr)), and the one-column fallback under 380px is minmax(0,1fr). Both halves are 194px and flush with the field.
• The fix reaches every sign-in drawn by these rules: hanzo.ai/login and /signup, hanzo.app's front page, and SignInPanel (hanzo.team).

Checks

• vitest run src/auth/: 25 passed. The new case pins both column rules to minmax(0,1fr) tracks, and it failed before the change.
• I swapped the rule in place in the live page's own card stylesheet at 1440px. Before: Google 197px, GitHub 195px, ending at x=923 against the field's 919. After: both 194px, GitHub ending at 919. Each label's content is 192px, so it still fits.