@layer sections {
.how {
  --how-murky: #f2e8c4;
  --how-clean: #d7f0f8;
}

.how__layout {
  display: flex;
  flex-direction: column;
}

.how__steps {
  display: grid;
}

.how__step {
  display: grid;
  min-block-size: clamp(7rem, 19vh, 11rem);
  padding-block: 0.25rem;
}

.how__step-body {
  display: grid;
  align-content: center;
  gap: var(--space-2xs);
  max-inline-size: 36rem;
  margin-inline: calc(-1 * var(--space-xs));
  padding: var(--space-2xs) var(--space-sm);
  border-radius: var(--radius-btn);
  transition: background-color var(--dur-base) ease, box-shadow var(--dur-base) ease;
}

html.js .how__step {
  cursor: pointer;
  touch-action: manipulation;
}

html.js .how__step.is-active .how__step-body {
  background-color: var(--color-bg);
}

@media (hover: hover) {
  html.js .how__step:not(.is-active):hover .how__step-body {
    background-color: color-mix(in srgb, var(--color-bg) 55%, transparent);
  }
}

.how__step-btn {
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  text-align: start;
  cursor: inherit;
}

@supports selector(:has(*)) {
  .how__step-btn:focus-visible {
    outline: none;
  }

  .how__step-body:has(.how__step-btn:focus-visible) {
    outline: 3px solid var(--color-focus);
    outline-offset: 3px;
  }
}

@media (forced-colors: active) {
  html.js .how__step.is-active .how__step-body {
    outline: 2px solid Highlight;
  }
}

.how__step-title {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--color-purple);
  font-size: clamp(1.125rem, 1rem + 0.6vw, 1.375rem);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-card-title);
}

.how__num {
  display: grid;
  flex: none;
  place-items: center;
  inline-size: 1.75rem;
  block-size: 1.75rem;
  border: 2px solid var(--color-purple);
  border-radius: 50%;
  background-color: var(--color-bg);
  color: var(--color-purple);
  font-size: var(--fs-small);
  line-height: 1;
  transition: background-color var(--dur-base) ease, color var(--dur-base) ease;
}

html.js .how__step.is-active .how__num {
  background-color: var(--color-purple);
  color: var(--color-text-inverse);
}

.how__stage {
  order: -1;
  position: sticky;
  inset-block-start: calc(var(--header-h) - 1px);
  z-index: 1;
  margin-inline: calc(-1 * var(--gutter));
  padding: 0.25rem var(--gutter);
  background-color: var(--color-bg-alt);
}

.how__card {
  position: relative;
  padding: 0.375rem;
  border-radius: var(--radius-photo-sm);
  background-color: var(--color-bg);
}

.how__scene {
  display: block;
  inline-size: 100%;
  max-inline-size: min(100%, 15rem, 33vh);
  block-size: auto;
  margin-inline: auto;
}

.how__note {
  margin-block-start: 0.125rem;
  color: color-mix(in srgb, var(--color-text) 75%, transparent);
  font-size: 0.8125rem;
  line-height: 1.3;
  text-align: center;
}

@media (min-width: 37.5em) and (max-width: 56.24em) {
  .how__scene {
    max-inline-size: min(100%, 18rem, 33vh);
  }
}

@media (max-height: 34rem) and (max-width: 56.24em) {
  .how__scene {
    max-inline-size: 9rem;
  }

  .how__note {
    display: none;
  }
}

@media (min-width: 56.25em) {
  .how__layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 32rem);
    column-gap: clamp(2rem, 6vw, 5rem);
    align-items: start;
  }

  .how__steps {
    grid-column: 1;
    grid-row: 1;
  }

  .how__step {
    min-block-size: clamp(8.5rem, 21vh, 14rem);
  }

  .how__num {
    inline-size: 2rem;
    block-size: 2rem;
    font-size: var(--fs-body);
  }

  .how__stage {
    order: 0;
    grid-column: 2;
    grid-row: 1;
    inset-block-start: calc(var(--header-h) + var(--space-md));
    margin-inline: 0;
    padding: 0;
    background: none;
  }

  .how__card {
    padding: 0.875rem;
  }

  .how__scene {
    max-inline-size: none;
  }
}

.sc-water {
  fill: var(--how-murky);
  stroke: #c9c4e6;
  stroke-width: 2;
  transition: fill 1s ease;
}

.how--s4 .sc-water {
  fill: var(--how-clean);
}

.sc-carrier {
  opacity: 0;
  transform: translateY(-10px);
  transition: opacity 0.6s ease, transform 0.8s var(--ease-out);
}

.how--s2 .sc-carrier {
  opacity: 1;
  transform: none;
}

.sc-particle,
.sc-spark,
.sc-shape,
.sc-frag {
  transform-box: fill-box;
  transform-origin: center;
}

.sc-particle {
  opacity: 0;
  transform: scale(0);
  transition: opacity 0.3s ease, transform 0.4s var(--ease-out);
}

.how--s2 .sc-particle {
  opacity: 1;
  transform: scale(1);
  transition: opacity 0.4s ease calc(0.3s + var(--i) * 45ms), transform 0.5s var(--ease-spring) calc(0.3s + var(--i) * 45ms);
}

.sc-beams,
.sc-lamp,
.sc-spark {
  opacity: 0;
  transition: opacity 0.8s ease;
}

.how--s3 .sc-beams,
.how--s3 .sc-lamp {
  opacity: 1;
}

.how--s3 .sc-spark {
  opacity: 1;
  transition-delay: calc(0.2s + var(--i) * 40ms);
}

.sc-p {
  transition: transform 0.9s var(--ease-out);
}

.how--s3 .sc-p {
  transform: translate(var(--sx), 0);
}

.sc-shape {
  transition: opacity 0.8s ease, transform 0.8s var(--ease-out);
}

.how--s2 .sc-p.is-mid .sc-shape {
  opacity: 0;
}

.how--s4 .sc-p.is-near .sc-shape {
  opacity: 0;
  transform: scale(0.15);
}

.how--s4 .sc-p.is-far .sc-shape {
  opacity: 0.35;
  transform: scale(0.65);
}

.sc-frag {
  opacity: 0;
}

.how--s4 .sc-p.is-near .sc-frag {
  animation: how-frag 3.5s ease 0.3s both;
}

.sc-drift {
  animation: how-drift var(--dur) ease-in-out var(--delay) infinite;
}

.how--s3 .sc-particle {
  animation: how-pulse 3.2s ease-in-out calc(var(--i) * 0.2s) infinite;
}

.how--s3 .sc-spark {
  animation: how-twinkle 2.4s ease-in-out calc(var(--i) * 0.17s) infinite;
}

.how:not(.is-visible) :is(.sc-drift, .sc-particle, .sc-spark) {
  animation-play-state: paused;
}

html[data-motion="paused"] .how :is(.sc-drift, .sc-particle, .sc-spark) {
  animation-play-state: paused;
}

html.no-js .how :is(.sc-drift, .sc-particle, .sc-spark) {
  animation: none;
}

.how--instant * {
  transition: none !important;
}

@media (prefers-reduced-motion: reduce) {
  .how :is(.sc-drift, .sc-particle, .sc-spark, .sc-frag) {
    animation: none;
  }

  .how--s4 .sc-p.is-near .sc-frag {
    opacity: 0.6;
  }
}

@keyframes how-drift {
  50% {
    transform: translate(var(--dx), var(--dy));
  }
}

@keyframes how-pulse {
  50% {
    transform: scale(1.18);
  }
}

@keyframes how-twinkle {
  0%,
  100% {
    opacity: 0.35;
    transform: scale(0.85);
  }

  50% {
    opacity: 1;
    transform: scale(1.12);
  }
}

@keyframes how-frag {
  0% {
    opacity: 0;
    transform: scale(0.5);
  }

  25% {
    opacity: 0.85;
    transform: scale(1.2);
  }

  100% {
    opacity: 0.25;
    transform: scale(1.6);
  }
}
}