p]:inline” data-streamdown=”list-item”>Step-by-Step: Installing and Setting Up a Wireless Meter

Those are CSS custom properties (variables) and a style declaration likely used by a design system or animation library. Briefly:

• –sd-animation: sd-fadeIn;
  • Name of the animation to apply (here a predefined keyframe/animation identifier “sd-fadeIn”).
• –sd-duration: 250ms;
  • Duration of the animation — 250 milliseconds.
• –sd-easing: ease-in;
  • Timing function controlling animation acceleration — in this case it starts slowly and speeds up.

How they’re used (example):

.element {animation-name: var(–sd-animation);  animation-duration: var(–sd-duration);  animation-timing-function: var(–sd-easing);}@keyframes sd-fadeIn {  from { opacity: 0; transform: translateY(6px); }  to   { opacity: 1; transform: translateY(0); }}

Notes:

• These variables let you change animation behavior per element or theme without editing the animation rules.