- Collapse the view navigation into a hamburger menu on phones. The nav is
wrapped in a <details> (pure CSS, no JS — so it works on the crawlable SEO
pages too): transparent (display:contents) on desktop so the tabs render
inline, a dropdown behind a hamburger under 640px. The °F/°C toggle, bell and
account stay in the header bar; units.js/account.js now anchor their injected
controls on the wrapper.
- Replace the header logo: the ▚ glyph was a rotated Unicode char that fonts
rendered inconsistently (warped). Use a crisp inline SVG of the two accent
squares (currentColor) across all headers.
- Month pages: turn the plain "Visiting <city> in <month>?" line into a bordered
callout with a CTA button, matching the city page's travel box.
Verified in Firefox and Chromium at desktop and 390px, light and dark: desktop
nav inline, mobile hamburger opens the dropdown, logo crisp, travel note styled.
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