nyastodon/app/javascript/flavours/glitch/styles/homogay/animations.scss

// turn the timed line into a highly addictive dopamine slot machine

// fav button
.no-reduce-motion .icon-button.star-icon {
  &.deactivate {
    & > .fa-star {
      animation: none;
    }
  }
  &.activate {
    & > .fa-star {
      animation: spring-rotate-in 1s cubic-bezier(.2, 0, .4, 1);
    }
  }
}
@keyframes spring-rotate-in {
  0% {
    transform: rotate(0deg);
  }
  20% {
    transform: rotate(20deg);
  }
  60% {
    transform: rotate(-380deg);
  }
  85% {
    transform: rotate(-355deg);
  }
  100% {
    transform: rotate(-360deg);
  }
}
@keyframes spring-rotate-out {
  0% {
    transform: rotate(-360deg);
  }
  60% {
    transform: rotate(20deg);
  }
  85% {
    transform: rotate(-5deg);
  }
  100% {
    transform: rotate(0deg);
  }
}

// bookmark button
.no-reduce-motion .icon-button {
  & > .fa-bookmark {
    transform: translateY(0);
    animation: none;
  }
  &.active > .fa-bookmark {
    animation: bookmark-save .6s cubic-bezier(.2, 0, .4, 1);
  }
}
@keyframes bookmark-save {
  0% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-3px);
  }
  60% {
    transform: translateY(4px);
  }
  100% {
    transform: translateY(0);
  }
}

// collapse button at the top right of all posts
.no-reduce-motion .status__collapse-button {
  &.activate > .fa-angle-double-up {
    animation: spring-flip-in .5s cubic-bezier(.2, 0, .4, 1);
  }
  &.deactivate > .fa-angle-double-up {
    animation: spring-flip-out .5s cubic-bezier(.2, 0, .4, 1);
  }
}
@keyframes spring-flip-in {
  0% {
    transform: rotate(0deg);
  }
  60% {
    transform: rotate(-190deg);
  }
  85% {
    transform: rotate(-175deg);
  }
  100% {
    transform: rotate(-180deg);
  }
}
@keyframes spring-flip-out {
  0% {
    transform: rotate(-180deg);
  }
  60% {
    transform: rotate(10deg);
  }
  85% {
    transform: rotate(-5deg)
  }
  100% {
    transform: rotate(0deg);
  }
}