02ぷにぷにゼリーのバウンド

<main class="stage">
<div class="jl is-demo" id="jl">
  <output class="jl__count" id="jlCount" aria-hidden="true">0</output>
  <button class="jl__hit" type="button" aria-label="ゼリーを弾ませる">
    <span class="jl__scene" aria-hidden="true">
      <span class="jl__shadow"></span>
      <span class="jl__body" id="jlBody">
        <span class="jl__eye jl__eye--l"></span>
        <span class="jl__eye jl__eye--r"></span>
        <span class="jl__mouth"></span>
        <span class="jl__shine"></span>
      </span>
    </span>
  </button>
</div>
</main>

@use "../../../../site/static/demo-tokens" as *;

// 폭신 젤리 튀어오름 — 눌렀다 늘어나며 뛰고, 착지한 뒤 좌우로 출렁여 안정된다.
// 스쿼시·스트레치를 전부 transform(scaleY·translateY) 로만 한다 — width/height 를 건드리면
// 매 프레임 레이아웃이 다시 돈다. 그림자는 젤리가 뜬 만큼 가로로 줄어 착지감을 준다.
// 카운터(output)는 장식이라 aria-hidden — 횟수는 단추 라벨이 대신 알린다.

$duration: $dur-loop;
$easing: $ease-pop;
$color: $subject-mint;

@include stage($stage-yellow);

.jl { position: relative; display: grid; place-items: end center; }

// 카운터 — 젤리 머리 위 작은 알약. 배경 노랑 위 잉크 글자(대비 14.9:1)
.jl__count {
  position: absolute; top: 0; left: 50%; transform: translateX(-50%);
  min-width: $sp-6; padding: 0 $sp-2; box-sizing: border-box;
  background: $subject-ink; color: $stage-yellow;
  border-radius: $r-pill; text-align: center;
  font-weight: 700; font-size: 12px; line-height: 20px;
}

.jl__hit { border: 0; padding: 0; background: none; cursor: pointer; -webkit-tap-highlight-color: transparent; }
.jl__hit:focus-visible { outline: 2px solid $subject-ink; outline-offset: 4px; border-radius: $r-card; }

.jl__scene {
  position: relative; display: block; box-sizing: border-box;
  width: clamp(150px, 48vw, 210px); height: clamp(120px, 38vw, 168px);
}

// 바닥 그림자 — 젤리 발밑. 떠 있는 동안 가로로 줄고 연해진다(누적면적에 잡히는 움직임)
.jl__shadow {
  position: absolute; bottom: 0; left: 50%; width: 62%; height: 12px;
  background: rgba(23, 20, 26, .22); border-radius: 50%;
  transform: translateX(-50%);
}

// 젤리 몸 — 둥근 돔. 변형은 전부 이 요소 하나의 transform
.jl__body {
  position: absolute; bottom: 4px; left: 50%; width: 56%; aspect-ratio: 1 / .82;
  background: $color; border: 3px solid $subject-ink;
  border-radius: 46% 46% 42% 42% / 58% 58% 38% 38%;
  transform: translateX(-50%);
}
.jl__shine {
  position: absolute; top: 14%; left: 18%; width: 22%; height: 16%;
  background: rgba(255, 255, 255, .55); border-radius: 50%;
}
.jl__eye {
  position: absolute; top: 34%; width: 9%; aspect-ratio: 1;
  background: $subject-ink; border-radius: 50%;
}
.jl__eye--l { left: 26%; }
.jl__eye--r { right: 26%; }
.jl__mouth {
  position: absolute; top: 48%; left: 50%; width: 18%; height: 9%;
  border: 3px solid $subject-ink; border-top: 0; border-radius: 0 0 $r-pill $r-pill;
  transform: translateX(-50%);
}

// ── 격자 미리보기 루프(2초): 웅크림(8%) → 도약(16~26%) → 착지 눌림(26%) → 출렁(34~66%) → 안정
.jl.is-demo .jl__body {
  animation-name: jlHop;
  animation-duration: $duration;
  animation-timing-function: $easing;
  animation-iteration-count: infinite;
}
.jl.is-demo .jl__shadow {
  animation-name: jlShadow;
  animation-duration: $duration;
  animation-timing-function: $easing;
  animation-iteration-count: infinite;
}

@keyframes jlHop {
  0% { transform: translateX(-50%) scale(1, 1); }
  8% { transform: translateX(-50%) scale(1.16, .66); }
  16% { transform: translateX(-50%) translateY(-52px) scale(.9, 1.16); }
  24% { transform: translateX(-50%) translateY(-18px) scale(.98, 1.05); }
  30% { transform: translateX(-50%) scale(1.12, .78); }
  38% { transform: translateX(-50%) scale(.96, 1.06); }
  46% { transform: translateX(-50%) scale(1.06, .93); }
  54% { transform: translateX(-50%) scale(.97, 1.04); }
  62% { transform: translateX(-50%) scale(1.03, .97); }
  70%, 100% { transform: translateX(-50%) scale(1, 1); }
}
@keyframes jlShadow {
  0% { transform: translateX(-50%) scale(1, 1); }
  8% { transform: translateX(-50%) scale(1.1, 1); }
  16% { transform: translateX(-50%) scale(.55, .8); }
  30% { transform: translateX(-50%) scale(1.08, 1); }
  40%, 100% { transform: translateX(-50%) scale(1, 1); }
}

// ── 눌렀을 때 큰 바운드(일회성). 미리보기 루프보다 높이 뜨고 이징은 더 세게 튄다
.jl__body--boing { animation: jlBoing 700ms cubic-bezier(.28, 1.7, .42, 1) 1; }
@keyframes jlBoing {
  0% { transform: translateX(-50%) scale(1.2, .6); }
  30% { transform: translateX(-50%) translateY(-72px) scale(.86, 1.22); }
  55% { transform: translateX(-50%) scale(1.18, .74); }
  75% { transform: translateX(-50%) scale(.96, 1.06); }
  100% { transform: translateX(-50%) scale(1, 1); }
}

// ── 좁은 화면: 장면을 줄여 무대 안에 들어온다
@media (max-width: 340px) {
  .jl__count { font-size: 11px; line-height: 16px; }
  .jl__body { border-width: 2px; }
}

@media (prefers-reduced-motion: reduce) {
  // 출렁임을 끊면 가만히 서 있는 젤리가 남는다 — 눌렀을 때는 카운터만 오른다
  .jl.is-demo .jl__body,
  .jl.is-demo .jl__shadow,
  .jl__body--boing {
    animation: none !important;
  }
}

html, body {
  margin: 0;
  overflow: hidden;
}

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #ffd23f;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.jl {
  position: relative;
  display: grid;
  place-items: end center;
}

.jl__count {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  min-width: 24px;
  padding: 0 8px;
  box-sizing: border-box;
  background: #17141a;
  color: #ffd23f;
  border-radius: 999px;
  text-align: center;
  font-weight: 700;
  font-size: 12px;
  line-height: 20px;
}

.jl__hit {
  border: 0;
  padding: 0;
  background: none;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.jl__hit:focus-visible {
  outline: 2px solid #17141a;
  outline-offset: 4px;
  border-radius: 16px;
}

.jl__scene {
  position: relative;
  display: block;
  box-sizing: border-box;
  width: clamp(150px, 48vw, 210px);
  height: clamp(120px, 38vw, 168px);
}

.jl__shadow {
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 62%;
  height: 12px;
  background: rgba(23, 20, 26, 0.22);
  border-radius: 50%;
  transform: translateX(-50%);
}

.jl__body {
  position: absolute;
  bottom: 4px;
  left: 50%;
  width: 56%;
  aspect-ratio: 1/0.82;
  background: #4cd4a6;
  border: 3px solid #17141a;
  border-radius: 46% 46% 42% 42%/58% 58% 38% 38%;
  transform: translateX(-50%);
}

.jl__shine {
  position: absolute;
  top: 14%;
  left: 18%;
  width: 22%;
  height: 16%;
  background: rgba(255, 255, 255, 0.55);
  border-radius: 50%;
}

.jl__eye {
  position: absolute;
  top: 34%;
  width: 9%;
  aspect-ratio: 1;
  background: #17141a;
  border-radius: 50%;
}

.jl__eye--l {
  left: 26%;
}

.jl__eye--r {
  right: 26%;
}

.jl__mouth {
  position: absolute;
  top: 48%;
  left: 50%;
  width: 18%;
  height: 9%;
  border: 3px solid #17141a;
  border-top: 0;
  border-radius: 0 0 999px 999px;
  transform: translateX(-50%);
}

.jl.is-demo .jl__body {
  animation-name: jlHop;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 1.4, 0.4, 1);
  animation-iteration-count: infinite;
}

.jl.is-demo .jl__shadow {
  animation-name: jlShadow;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 1.4, 0.4, 1);
  animation-iteration-count: infinite;
}

@keyframes jlHop {
  0% {
    transform: translateX(-50%) scale(1, 1);
  }
  8% {
    transform: translateX(-50%) scale(1.16, 0.66);
  }
  16% {
    transform: translateX(-50%) translateY(-52px) scale(0.9, 1.16);
  }
  24% {
    transform: translateX(-50%) translateY(-18px) scale(0.98, 1.05);
  }
  30% {
    transform: translateX(-50%) scale(1.12, 0.78);
  }
  38% {
    transform: translateX(-50%) scale(0.96, 1.06);
  }
  46% {
    transform: translateX(-50%) scale(1.06, 0.93);
  }
  54% {
    transform: translateX(-50%) scale(0.97, 1.04);
  }
  62% {
    transform: translateX(-50%) scale(1.03, 0.97);
  }
  70%, 100% {
    transform: translateX(-50%) scale(1, 1);
  }
}
@keyframes jlShadow {
  0% {
    transform: translateX(-50%) scale(1, 1);
  }
  8% {
    transform: translateX(-50%) scale(1.1, 1);
  }
  16% {
    transform: translateX(-50%) scale(0.55, 0.8);
  }
  30% {
    transform: translateX(-50%) scale(1.08, 1);
  }
  40%, 100% {
    transform: translateX(-50%) scale(1, 1);
  }
}
.jl__body--boing {
  animation: jlBoing 700ms cubic-bezier(0.28, 1.7, 0.42, 1) 1;
}

@keyframes jlBoing {
  0% {
    transform: translateX(-50%) scale(1.2, 0.6);
  }
  30% {
    transform: translateX(-50%) translateY(-72px) scale(0.86, 1.22);
  }
  55% {
    transform: translateX(-50%) scale(1.18, 0.74);
  }
  75% {
    transform: translateX(-50%) scale(0.96, 1.06);
  }
  100% {
    transform: translateX(-50%) scale(1, 1);
  }
}
@media (max-width: 340px) {
  .jl__count {
    font-size: 11px;
    line-height: 16px;
  }
  .jl__body {
    border-width: 2px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .jl.is-demo .jl__body,
  .jl.is-demo .jl__shadow,
  .jl__body--boing {
    animation: none !important;
  }
}

var jl = document.getElementById('jl');
var body = document.getElementById('jlBody');
var count = document.getElementById('jlCount');
var hits = 0;

// 누를 때마다 카운터가 오르고 젤리가 평소보다 크게 한 번 튄다 — 클래스를 もう一度 끼워 애니메이션을 재시동
document.querySelector('.jl__hit').addEventListener('click', function () {
  jl.classList.remove('is-demo');
  hits = hits + 1;
  count.textContent = String(hits);
  body.classList.remove('jl__body--boing');
  void body.offsetWidth;
  body.classList.add('jl__body--boing');
});
jl.addEventListener('pointerdown', function () { jl.classList.remove('is-demo'); });

// CuteJellyBounce — vanilla 판(run/075/demo/02-cute-jelly-bounce) 의 React 포트.
// 누를 때마다 카운터가 오르고 젤리가 크게 한 번 튄다 — 몸 요소를 key 로 다시 만들어 일회성 애니메이션을 재시동한다.
import { useState } from "react";
import type { CSSProperties } from "react";
import styles from "./CuteJellyBounce.module.scss";

export type CuteJellyBounceProps = {
  duration?: number;
  easing?: string;
  color?: string;
};

type Vars = CSSProperties & { "--duration"?: string; "--easing"?: string; "--color"?: string };

export default function CuteJellyBounce(props: CuteJellyBounceProps) {
  const duration = props.duration ?? 2000;
  const easing = props.easing ?? "cubic-bezier(.2, 1.4, .4, 1)";
  const color = props.color ?? "#4cd4a6";
  const [hits, setHits] = useState<number>(0);
  const [preview, setPreview] = useState<boolean>(true);
  const vars: Vars = { "--duration": duration + "ms", "--easing": easing, "--color": color };

  return (
    <main className={styles.stage}>
      <div className={styles.jl + (preview ? " " + styles.isDemo : "")} style={vars}>
        <output className={styles.count} aria-hidden="true">{hits}</output>
        <button
          className={styles.hit}
          type="button"
          aria-label="젤리 튀기"
          onClick={() => setHits(hits + 1)}
          onPointerDown={() => setPreview(false)}
        >
          <span className={styles.scene} aria-hidden="true">
            <span className={styles.shadow}></span>
            <span className={styles.body} key={"boing" + hits}>
              <span className={styles.eye + " " + styles.eyeL}></span>
              <span className={styles.eye + " " + styles.eyeR}></span>
              <span className={styles.mouth}></span>
              <span className={styles.shine}></span>
            </span>
          </span>
        </button>
      </div>
    </main>
  );
}