soapbox/app/styles/loading.scss

.loading-indicator {
  color: var(--primary-text-color--faint);
  font-size: 12px;
  font-weight: 400;
  text-transform: uppercase;
  overflow: visible;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);

  span {
    display: block;
    float: left;
    margin-left: 50%;
    transform: translateX(-50%);
    margin: 82px 0 0 50%;
    white-space: nowrap;
  }
}

.loading-indicator__figure {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 42px;
  height: 42px;
  box-sizing: border-box;
  background-color: transparent;
  border: 0 solid hsla(var(--brand-color_hsl), 0.5);
  border-width: 6px;
  border-radius: 50%;
}

.no-reduce-motion .loading-indicator span {
  animation: loader-label 1.15s infinite cubic-bezier(0.215, 0.61, 0.355, 1);
}

.no-reduce-motion .loading-indicator__figure {
  animation: loader-figure 1.15s infinite cubic-bezier(0.215, 0.61, 0.355, 1);
}

@keyframes loader-figure {
  0% {
    width: 0;
    height: 0;
    background-color: hsla(var(--brand-color_hsl), 0.5);
  }

  29% {
    background-color: hsla(var(--brand-color_hsl), 0.5);
  }

  30% {
    width: 42px;
    height: 42px;
    background-color: transparent;
    border-width: 21px;
    opacity: 1;
  }

  100% {
    width: 42px;
    height: 42px;
    border-width: 0;
    opacity: 0;
    background-color: transparent;
  }
}

@keyframes loader-label {
  0% { opacity: 0.25; }
  30% { opacity: 1; }
  100% { opacity: 0.25; }
}

@keyframes heartbeat {
  from {
    transform: scale(1);
    animation-timing-function: ease-out;
  }

  10% {
    transform: scale(0.91);
    animation-timing-function: ease-in;
  }

  17% {
    transform: scale(0.98);
    animation-timing-function: ease-out;
  }

  33% {
    transform: scale(0.87);
    animation-timing-function: ease-in;
  }

  45% {
    transform: scale(1);
    animation-timing-function: ease-out;
  }
}

.no-reduce-motion .pulse-loading {
  transform-origin: center center;
  animation: heartbeat 1.5s ease-in-out infinite both;
}

@keyframes shake-bottom {
  0%,
  100% {
    transform: rotate(0deg);
    transform-origin: 50% 100%;
  }

  10% {
    transform: rotate(2deg);
  }

  20%,
  40%,
  60% {
    transform: rotate(-4deg);
  }

  30%,
  50%,
  70% {
    transform: rotate(4deg);
  }

  80% {
    transform: rotate(-2deg);
  }

  90% {
    transform: rotate(2deg);
  }
}

.no-reduce-motion .shake-bottom {
  transform-origin: 50% 100%;
  animation: shake-bottom 0.8s cubic-bezier(0.455, 0.03, 0.515, 0.955) 2s 2 both;
}

.loading-bar {
  background-color: var(--highlight-text-color);
  height: 3px;
  position: absolute;
  top: 0;
  left: 0;
}

.load-more {
  display: block;
  color: var(--primary-text-color);
  background-color: transparent;
  border: 0;
  font-size: inherit;
  text-align: center;
  line-height: inherit;
  margin: 0;
  padding: 15px;
  box-sizing: border-box;
  width: 100%;
  clear: both;
  text-decoration: none;

  &:hover {
    background: var(--brand-color--faint);
  }
}

.load-gap {
  border-bottom: 1px solid var(--brand-color--med);
}

.regeneration-indicator {
  text-align: center;
  font-size: 16px;
  font-weight: 500;
  color: var(--primary-text-color);
  background: var(--accent-color--faint);
  cursor: default;
  display: flex;
  flex: 1 1 auto;
  align-items: center;
  justify-content: center;
  padding: 20px;

  & > div {
    width: 100%;
    background: transparent;
    padding-top: 0;
  }

  &__label {
    strong {
      display: block;
      margin-bottom: 10px;
      color: var(--primary-text-color);
    }

    span {
      font-size: 15px;
      font-weight: 400;
    }
  }
}