06부품 분해 조립

<main class="stage">
  <div class="ex is-demo">
    <div class="ex__scroller">
      <div class="ex__pad">
        <div class="ex__pin">
          <div class="ex__stack">
            <div class="ex__part ex__part--1"><span class="ex__tag">상판</span></div>
            <div class="ex__part ex__part--2">
              <svg viewBox="0 0 256 256" width="16" height="16" aria-hidden="true"><g fill="currentColor"><path d="M200 48H56a8 8 0 0 0-8 8v144a8 8 0 0 0 8 8h144a8 8 0 0 0 8-8V56a8 8 0 0 0-8-8m-48 104h-48v-48h48Z" opacity=".2"/><path d="M152 96h-48a8 8 0 0 0-8 8v48a8 8 0 0 0 8 8h48a8 8 0 0 0 8-8v-48a8 8 0 0 0-8-8m-8 48h-32v-32h32Zm88 0h-16v-32h16a8 8 0 0 0 0-16h-16V56a16 16 0 0 0-16-16h-40V24a8 8 0 0 0-16 0v16h-32V24a8 8 0 0 0-16 0v16H56a16 16 0 0 0-16 16v40H24a8 8 0 0 0 0 16h16v32H24a8 8 0 0 0 0 16h16v40a16 16 0 0 0 16 16h40v16a8 8 0 0 0 16 0v-16h32v16a8 8 0 0 0 16 0v-16h40a16 16 0 0 0 16-16v-40h16a8 8 0 0 0 0-16m-32 56H56V56h144z"/></g></svg>
              <span class="ex__tag">기판</span>
            </div>
            <div class="ex__part ex__part--3"><span class="ex__tag">프레임</span></div>
            <div class="ex__part ex__part--4"><span class="ex__tag">바닥판</span></div>
          </div>
        </div>
      </div>
    </div>
  </div>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: 1s;          // alternate 라 한 바퀴(분해 → 조립)는 2s
// 가운데가 가장 빠른 곡선 — 대표 이미지가 반쯤 벌어진(이름표도 보이는) 장면으로 뽑힌다
$easing: cubic-bezier(.5, 0, .5, 1);
$color: $subject-ink;

@include stage($stage-yellow);

.ex {
  --h: clamp(148px, 58vh, 176px);
  width: min(340px, 92vw);
}

.ex__scroller {
  height: var(--h);
  overflow-y: auto;
  scrollbar-width: none;
  &::-webkit-scrollbar { display: none; }
}

// ⚠ 여기는 padding-bottom 이 아니라 height 다. sticky 가 붙어 있을 수 있는 범위는 부모의
// **콘텐츠 박스**라, padding 으로만 늘린 자리는 안 쳐준다 — 창이 곧바로 위로 흘러나간다 (실측)
.ex__pad { height: calc(var(--h) * 2.2); }

.ex__pin {
  position: sticky;
  top: 0;
  display: grid;
  place-items: center;
  height: var(--h);
}

.ex__stack {
  position: relative;
  width: 184px;
  height: 120px;
}

.ex__part {
  position: absolute;
  top: 48px;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: $sp-2;
  width: 184px;
  height: 24px;
  border: 2px solid $color;
  border-radius: $r-sm;
  background: $subject-cream;
  color: $color;
  animation-duration: 1s;
  animation-timing-function: $easing;
  animation-fill-mode: both;
  animation-timeline: scroll(nearest block);
}

// ── 실제 동작: 스크롤 진행이 곧 분해 정도. 네 판이 서로 다른 방향으로 벌어진다 ──
.ex__part--1 { animation-name: ex-p1; background: $subject-pink; }
.ex__part--2 { animation-name: ex-p2; }
.ex__part--3 { animation-name: ex-p3; }
.ex__part--4 { animation-name: ex-p4; background: $subject-sky; }

@keyframes ex-p1 {
  from { transform: translate(0, -6px) rotate(0deg); }
  to   { transform: translate(-16px, -54px) rotate(-7deg); }
}
@keyframes ex-p2 {
  from { transform: translate(0, -2px) rotate(0deg); }
  to   { transform: translate(12px, -18px) rotate(4deg); }
}
@keyframes ex-p3 {
  from { transform: translate(0, 2px) rotate(0deg); }
  to   { transform: translate(-12px, 18px) rotate(-4deg); }
}
@keyframes ex-p4 {
  from { transform: translate(0, 6px) rotate(0deg); }
  to   { transform: translate(16px, 54px) rotate(7deg); }
}

// 이름표는 판이 벌어진 만큼만 보인다 — 포개져 있을 땐 글자가 겹치지 않는다
.ex__tag {
  font-size: 11px;
  line-height: 14px;
  font-weight: 700;
  opacity: 0;
  animation-name: ex-tag;
  animation-duration: 1s;
  animation-timing-function: linear;
  animation-fill-mode: both;
  animation-timeline: scroll(nearest block);
}

@keyframes ex-tag {
  0%, 10%   { opacity: 0; }
  38%, 100% { opacity: 1; }
}

// ── 격자 미리보기 루프 — 같은 분해를 시간으로 돌렸다 되감는다 ──
.ex.is-demo .ex__part,
.ex.is-demo .ex__tag {
  animation-duration: $duration;
  animation-direction: alternate;
  animation-iteration-count: infinite;
  animation-timeline: auto;
}

@media (prefers-reduced-motion: reduce) {
  .ex__part { animation: none !important; }
  .ex__part--1 { transform: translate(-16px, -54px); }
  .ex__part--2 { transform: translate(12px, -18px); }
  .ex__part--3 { transform: translate(-12px, 18px); }
  .ex__part--4 { transform: translate(16px, 54px); }
  .ex__tag { animation: none !important; opacity: 1; }
}

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);
}

.ex {
  --h: clamp(148px, 58vh, 176px);
  width: min(340px, 92vw);
}

.ex__scroller {
  height: var(--h);
  overflow-y: auto;
  scrollbar-width: none;
}
.ex__scroller::-webkit-scrollbar {
  display: none;
}

.ex__pad {
  height: calc(var(--h) * 2.2);
}

.ex__pin {
  position: sticky;
  top: 0;
  display: grid;
  place-items: center;
  height: var(--h);
}

.ex__stack {
  position: relative;
  width: 184px;
  height: 120px;
}

.ex__part {
  position: absolute;
  top: 48px;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 184px;
  height: 24px;
  border: 2px solid #17141a;
  border-radius: 8px;
  background: #fff7e6;
  color: #17141a;
  animation-duration: 1s;
  animation-timing-function: cubic-bezier(0.5, 0, 0.5, 1);
  animation-fill-mode: both;
  animation-timeline: scroll(nearest block);
}

.ex__part--1 {
  animation-name: ex-p1;
  background: #ff9ebb;
}

.ex__part--2 {
  animation-name: ex-p2;
}

.ex__part--3 {
  animation-name: ex-p3;
}

.ex__part--4 {
  animation-name: ex-p4;
  background: #6ec8ff;
}

@keyframes ex-p1 {
  from {
    transform: translate(0, -6px) rotate(0deg);
  }
  to {
    transform: translate(-16px, -54px) rotate(-7deg);
  }
}
@keyframes ex-p2 {
  from {
    transform: translate(0, -2px) rotate(0deg);
  }
  to {
    transform: translate(12px, -18px) rotate(4deg);
  }
}
@keyframes ex-p3 {
  from {
    transform: translate(0, 2px) rotate(0deg);
  }
  to {
    transform: translate(-12px, 18px) rotate(-4deg);
  }
}
@keyframes ex-p4 {
  from {
    transform: translate(0, 6px) rotate(0deg);
  }
  to {
    transform: translate(16px, 54px) rotate(7deg);
  }
}
.ex__tag {
  font-size: 11px;
  line-height: 14px;
  font-weight: 700;
  opacity: 0;
  animation-name: ex-tag;
  animation-duration: 1s;
  animation-timing-function: linear;
  animation-fill-mode: both;
  animation-timeline: scroll(nearest block);
}

@keyframes ex-tag {
  0%, 10% {
    opacity: 0;
  }
  38%, 100% {
    opacity: 1;
  }
}
.ex.is-demo .ex__part,
.ex.is-demo .ex__tag {
  animation-duration: 1s;
  animation-direction: alternate;
  animation-iteration-count: infinite;
  animation-timeline: auto;
}

@media (prefers-reduced-motion: reduce) {
  .ex__part {
    animation: none !important;
  }
  .ex__part--1 {
    transform: translate(-16px, -54px);
  }
  .ex__part--2 {
    transform: translate(12px, -18px);
  }
  .ex__part--3 {
    transform: translate(-12px, 18px);
  }
  .ex__part--4 {
    transform: translate(16px, 54px);
  }
  .ex__tag {
    animation: none !important;
    opacity: 1;
  }
}

// 실제 동작은 CSS 만: 부품마다 animation-timeline: scroll() 이 걸려 있어 스크롤 진행이 곧 분해 정도다.
var r = document.querySelector('.ex');
var s = r.querySelector('.ex__scroller');
function stopDemo(){ r.classList.remove('is-demo'); }
r.addEventListener('pointerdown', stopDemo);
s.addEventListener('scroll', stopDemo, { passive: true });

import type { CSSProperties, ReactNode } from "react";
import styles from "./ExplodedParts.module.scss";

export type ExplodedPartsProps = {
  parts?: string[];
  preview?: boolean;
  duration?: number;
  easing?: string;
  color?: string;
};

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

const IconCpu = (): ReactNode => (
  <svg viewBox="0 0 256 256" width="16" height="16" aria-hidden="true"><g fill="currentColor"><path d="M200 48H56a8 8 0 0 0-8 8v144a8 8 0 0 0 8 8h144a8 8 0 0 0 8-8V56a8 8 0 0 0-8-8m-48 104h-48v-48h48Z" opacity=".2"/><path d="M152 96h-48a8 8 0 0 0-8 8v48a8 8 0 0 0 8 8h48a8 8 0 0 0 8-8v-48a8 8 0 0 0-8-8m-8 48h-32v-32h32Zm88 0h-16v-32h16a8 8 0 0 0 0-16h-16V56a16 16 0 0 0-16-16h-40V24a8 8 0 0 0-16 0v16h-32V24a8 8 0 0 0-16 0v16H56a16 16 0 0 0-16 16v40H24a8 8 0 0 0 0 16h16v32H24a8 8 0 0 0 0 16h16v40a16 16 0 0 0 16 16h40v16a8 8 0 0 0 16 0v-16h32v16a8 8 0 0 0 16 0v-16h40a16 16 0 0 0 16-16v-40h16a8 8 0 0 0 0-16m-32 56H56V56h144z"/></g></svg>
);

export default function ExplodedParts({
  parts = ["Top plate", "Board", "Frame", "Base plate"],
  preview = true,
  duration = 1000,
  easing = "cubic-bezier(.5, 0, .5, 1)",
  color = "#17141a",
}: ExplodedPartsProps): ReactNode {
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };
  const cls = preview ? `${styles.ex} ${styles.isDemo}` : styles.ex;

  return (
    <div className={cls} style={vars}>
      <div className={styles.scroller}>
        <div className={styles.pad}>
          <div className={styles.pin}>
            <div className={styles.stack}>
              {parts.map((p: string, i: number): ReactNode => (
                <div className={`${styles.part} ${styles[`part${i + 1}`]}`} key={p}>
                  {i === 1 ? <IconCpu /> : null}
                  <span className={styles.tag}>{p}</span>
                </div>
              ))}
            </div>
          </div>
        </div>
      </div>
    </div>
  );
}