py-1 [&>p]:inline

These look like custom CSS properties (CSS variables) used to control a small animation system. Briefly:

• -sd-animation: sd-fadeIn;
  • Likely names the animation variant to apply (here, a “fade in” animation defined elsewhere as @keyframes sd-fadeIn or a CSS rule targeting [style=“–sd-animation: sd-fadeIn”]).
• –sd-duration: 0ms;
  • Sets the animation duration. 0ms means the animation is instantaneous (no visible transition).
• –sd-easing: ease-in;
  • Defines the timing function (acceleration curve) for the animation. “ease-in” accelerates from zero velocity.

• With duration 0ms the easing and animation name have no visible effect; change duration to a positive value (e.g., 300ms) to see the fade
• These variables must be read by CSS rules or JS to take effect. Example CSS reading them:
  .element {animation-name: var(–sd-animation);  animation-duration: var(–sd-duration);  animation-timing-function: var(–sd-easing);  animation-fill-mode: both;}@keyframes sd-fadeIn {  from { opacity: 0; transform: translateY(6px); }  to   { opacity: 1; transform: translateY(0); }}

• Ensure the custom property names are consistent (use the same var names in the consuming rules). Browsers ignore unknown animation names or invalid durations.
• If you control JS, you can toggle or set these variables at runtime via element.style.setProperty(‘–sd-duration’, ‘250ms’)