Rewrote all 11 email templates to use the Casera web brand: Outfit font via
Google Fonts, sage green (#6B8F71) brand stripe, cream (#FAFAF7) background,
pill-shaped clay (#C4856A) CTA buttons, icon-badge feature cards, numbered
tip cards, linen callout boxes, and refined light footer. Extracted reusable
helpers (emailButton, emailCodeBox, emailCalloutBox, emailAlertBox,
emailFeatureItem, emailTipCard) for consistent component composition.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>