Motion
One easing, three durations. No springs, no parallax, no auto-scrolling.
--dur-quick · 200ms
Micro-transitions: hover color, border changes.
--dur-base · 300ms
Default button, arrow, and link transitions. Matches the live .slider-arrow hover.
--dur-slow · 1000ms
Reserved for the hero slider crossfade. Do not use elsewhere.
Easing
Use ease-in-out everywhere. The live stylesheet uses transition: opacity 1s ease-in-out for the slider and transition: background 0.3s on interactive elements. Keep the vocabulary that small.