bulma/docs/_sass/index/focus-animations.scss

@keyframes bdGrow {
  from {
    transform: scale(0);
  }

  to {
    transform: scale(1);
  }
}

@keyframes bdSlideDown {
  from {
    opacity: 0;
    transform: translateY(-1rem);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes bdSlideUp {
  from {
    opacity: 0;
    transform: translateY(1rem);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

$cubic-dramatic: cubic-bezier(0, 0.75, 0.25, 1);
$cubic-less-dramatic: cubic-bezier(0.14, 0.71, 0.29, 0.86);
$cubic-magic: cubic-bezier(0.175, 0.885, 0.32, 1.275);

$duration: 500ms;
$delay: 250ms;
$wait: 500ms;

$focus-delay: 0;

%bd-focus-animation {
  animation-duration: $duration;
  animation-fill-mode: both;
  animation-timing-function: $cubic-less-dramatic;
  transform-origin: center center;
}

$delay-subtitle: $delay / 2;

// Titles
.bd-focus-item {
  .title {
    @extend %bd-focus-animation;

    animation-name: bdSlideDown;
  }

  .subtitle {
    @extend %bd-focus-animation;

    animation-name: bdSlideUp;
  }

  &:nth-child(1) {
    .title {
      animation-delay: $focus-delay;
    }

    .subtitle {
      animation-delay: $focus-delay + $delay-subtitle;
    }
  }

  &:nth-child(2) {
    .title {
      animation-delay: $focus-delay + $wait;
    }

    .subtitle {
      animation-delay: $focus-delay + $wait + $delay-subtitle;
    }
  }

  &:nth-child(3) {
    .title {
      animation-delay: $focus-delay + $wait * 2;
    }

    .subtitle {
      animation-delay: $focus-delay + $wait * 2 + $delay-subtitle;
    }
  }

  &:nth-child(4) {
    .title {
      animation-delay: $focus-delay + $wait * 3;
    }

    .subtitle {
      animation-delay: $focus-delay + $wait * 3 + $delay-subtitle;
    }
  }
}

// Devices
%bd-focus-animation-device {
  @extend %bd-focus-animation;

  animation-name: bdGrow;
  transform-origin: bottom center;
}

.bd-focus-mobile {
  @extend %bd-focus-animation-device;

  animation-delay: $focus-delay;
}

.bd-focus-tablet {
  @extend %bd-focus-animation-device;

  animation-delay: $focus-delay + $delay;
}

.bd-focus-desktop {
  @extend %bd-focus-animation-device;

  animation-delay: $focus-delay + $delay * 2;
}

// Cubes
$cube-factor: 10px;

@keyframes bdCube1 {
  0% {
    transform: translate3d(0, -5 * $cube-factor, 0);
    opacity: 0;
  }

  25%,
  100% {
    transform: translate3d(0, 0, 0);
    opacity: 1;
  }
}

@keyframes bdCube2 {
  0% {
    transform: translate3d(-4 * $cube-factor, 3 * $cube-factor, 0);
    opacity: 0;
  }

  25%,
  100% {
    transform: translate3d(0, 0, 0);
    opacity: 1;
  }
}

@keyframes bdCube3 {
  0% {
    transform: translate3d(4 * $cube-factor, 3 * $cube-factor, 0);
    opacity: 0;
  }

  25%,
  100% {
    transform: translate3d(0, 0, 0);
    opacity: 1;
  }
}

%bd-focus-animation-cube {
  @extend %bd-focus-animation;

  animation-direction: alternate;
  animation-duration: $duration * 4;
  animation-iteration-count: infinite;
}

.bd-focus-cube-1 {
  @extend %bd-focus-animation-cube;

  animation-delay: $focus-delay + $wait;
  animation-name: bdCube1;
}

.bd-focus-cube-2 {
  @extend %bd-focus-animation-cube;

  animation-name: bdCube2;
  animation-delay: $focus-delay + $wait + $delay;
}

.bd-focus-cube-3 {
  @extend %bd-focus-animation-cube;

  animation-name: bdCube3;
  animation-delay: $focus-delay + $wait + $delay * 2;
}

@keyframes bdFadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes bdSlowIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes bdScaleIn {
  from {
    opacity: 0;
    transform: scale(0);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

.bd-focus-css3 {
  @extend %bd-focus-animation;

  animation-delay: $focus-delay + $wait * 2;
  animation-name: bdScaleIn;
}

.bd-focus-github {
  @extend %bd-focus-animation;

  animation-delay: $focus-delay + $wait * 3;
  animation-duration: $duration * 3;
  animation-name: bdJellyPop;
}

@keyframes bdJellyPop {
  0% {
    opacity: 0;
    transform: matrix3d(0.1, 0, 0, 0, 0, 0.1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
  }

  3.4% {
    opacity: 1;
    transform: matrix3d(0.384, 0, 0, 0, 0, 0.466, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
  }

  4.7% {
    transform: matrix3d(0.505, 0, 0, 0, 0, 0.639, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
  }

  6.81% {
    transform: matrix3d(0.693, 0, 0, 0, 0, 0.904, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
  }

  9.41% {
    transform: matrix3d(0.895, 0, 0, 0, 0, 1.151, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
  }

  10.21% {
    transform: matrix3d(0.947, 0, 0, 0, 0, 1.204, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
  }

  13.61% {
    transform: matrix3d(1.111, 0, 0, 0, 0, 1.299, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
  }

  14.11% {
    transform: matrix3d(1.127, 0, 0, 0, 0, 1.298, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
  }

  17.52% {
    transform: matrix3d(1.187, 0, 0, 0, 0, 1.216, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
  }

  18.72% {
    transform: matrix3d(1.191, 0, 0, 0, 0, 1.169, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
  }

  21.32% {
    transform: matrix3d(1.177, 0, 0, 0, 0, 1.062, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
  }

  24.32% {
    transform: matrix3d(1.135, 0, 0, 0, 0, 0.964, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
  }

  25.23% {
    transform: matrix3d(1.121, 0, 0, 0, 0, 0.944, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
  }

  29.03% {
    transform: matrix3d(1.057, 0, 0, 0, 0, 0.907, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
  }

  29.93% {
    transform: matrix3d(1.043, 0, 0, 0, 0, 0.909, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
  }

  35.54% {
    transform: matrix3d(0.981, 0, 0, 0, 0, 0.966, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
  }

  36.74% {
    transform: matrix3d(0.974, 0, 0, 0, 0, 0.981, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
  }

  41.04% {
    transform: matrix3d(0.965, 0, 0, 0, 0, 1.02, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
  }

  44.44% {
    transform: matrix3d(0.969, 0, 0, 0, 0, 1.029, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
  }

  52.15% {
    transform: matrix3d(0.992, 0, 0, 0, 0, 1.006, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
  }

  59.86% {
    transform: matrix3d(1.005, 0, 0, 0, 0, 0.991, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
  }

  63.26% {
    transform: matrix3d(1.007, 0, 0, 0, 0, 0.993, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
  }

  75.28% {
    transform: matrix3d(1.001, 0, 0, 0, 0, 1.003, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
  }

  85.49% {
    transform: matrix3d(0.999, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
  }

  90.69% {
    transform: matrix3d(0.999, 0, 0, 0, 0, 0.999, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
  }

  100% {
    opacity: 1;
    transform: matrix3d(1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
  }
}