webawesome/source/css/loaders.css

/*! Loaders */

@keyframes loader {
  0%   { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.loader,
.loader-bg::after {
  width: var(--loader-size);
  height: var(--loader-size);
  border-radius: 50%;
  border: solid var(--loader-border-width) var(--loader-bg-color);
  border-top-color: var(--loader-border-color);
  border-left-color: var(--loader-border-color);
  display: inline-block;
  animation: loader var(--loader-speed) linear infinite;
  vertical-align: middle;
  margin: var(--loader-spacing-y) var(--loader-spacing-x);
}

.loader-small,
.loader-bg-small::after {
  border-width: calc(var(--loader-border-width) / 2);
  width: calc(var(--loader-size) / 2);
  height: calc(var(--loader-size) / 2);
}

.loader-big,
.loader-bg-big::after {
  border-width: calc(var(--loader-border-width) * 1.5);
  width: calc(var(--loader-size) * 2);
  height: calc(var(--loader-size) * 2);
}

.loader-bg {
  position: relative !important;
}

.loader-bg::after {
  content: '';
  position: absolute;
  top: calc(50% - var(--loader-size) / 2);
  left: calc(50% - var(--loader-size) / 2);
  margin: 0;
}

.loader-bg-small::after {
  position: absolute;
  top: calc(50% - var(--loader-size) / 4);
  left: calc(50% - var(--loader-size) / 4);
}

.loader-bg-big::after {
  position: absolute;
  top: calc(50% - var(--loader-size) / 1);
  left: calc(50% - var(--loader-size) / 1);
}