08インストール進捗バーと段階の文言

<main class="stage">
<div class="ip is-demo" id="ip">
  <div class="ip__title">
    <span class="ip__tico" aria-hidden="true"><svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" viewBox="0 0 256 256"><g fill="currentColor"><path d="M216 152v48a8 8 0 0 1-8 8H48a8 8 0 0 1-8-8v-48a8 8 0 0 1 8-8h160a8 8 0 0 1 8 8m-8-104H48a8 8 0 0 0-8 8v48a8 8 0 0 0 8 8h160a8 8 0 0 0 8-8V56a8 8 0 0 0-8-8" opacity=".2"/><path d="M208 136H48a16 16 0 0 0-16 16v48a16 16 0 0 0 16 16h160a16 16 0 0 0 16-16v-48a16 16 0 0 0-16-16m0 64H48v-48h160zm0-160H48a16 16 0 0 0-16 16v48a16 16 0 0 0 16 16h160a16 16 0 0 0 16-16V56a16 16 0 0 0-16-16m0 64H48V56h160zm-16-24a12 12 0 1 1-12-12a12 12 0 0 1 12 12m0 96a12 12 0 1 1-12-12a12 12 0 0 1 12 12"/></g></svg></span>
    <span class="ip__tname">セットアップウィザード</span>
    <span class="ip__tbtns" aria-hidden="true"><span class="ip__gb ip__gb--min"></span><span class="ip__gb"></span></span>
  </div>
  <div class="ip__body">
    <div class="ip__track">
      <span class="ip__fill" aria-hidden="true"></span>
      <span class="ip__cover" aria-hidden="true"></span>
      <span class="ip__done" aria-hidden="true"><svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" viewBox="0 0 256 256"><g fill="currentColor"><path d="M224 128a96 96 0 1 1-96-96a96 96 0 0 1 96 96" opacity=".2"/><path d="M173.66 98.34a8 8 0 0 1 0 11.32l-56 56a8 8 0 0 1-11.32 0l-24-24a8 8 0 0 1 11.32-11.32L112 148.69l50.34-50.35a8 8 0 0 1 11.32 0M232 128A104 104 0 1 1 128 24a104.11 104.11 0 0 1 104 104m-16 0a88 88 0 1 0-88 88a88.1 88.1 0 0 0 88-88"/></g></svg></span>
    </div>
    <div class="ip__meta">
      <span class="ip__phrases" aria-hidden="true">
        <span class="ip__sv ip__sv--1">ファイルの準備</span>
        <span class="ip__sv ip__sv--2">コピー中</span>
        <span class="ip__sv ip__sv--3">設定の保存</span>
        <span class="ip__sv ip__sv--4">仕上げ中</span>
        <span class="ip__sv ip__sv--5">インストール完了</span>
      </span>
      <span class="ip__nums" aria-hidden="true">
        <span class="ip__nm ip__nm--1">812 MB</span>
        <span class="ip__nm ip__nm--2">744 MB</span>
        <span class="ip__nm ip__nm--3">663 MB</span>
        <span class="ip__nm ip__nm--4">581 MB</span>
        <span class="ip__nm ip__nm--5">502 MB</span>
        <span class="ip__nm ip__nm--6">421 MB</span>
        <span class="ip__nm ip__nm--7">340 MB</span>
        <span class="ip__nm ip__nm--8">262 MB</span>
        <span class="ip__nm ip__nm--9">183 MB</span>
        <span class="ip__nm ip__nm--10">102 MB</span>
        <span class="ip__nm ip__nm--11">47 MB</span>
        <span class="ip__nm ip__nm--12">0 MB</span>
      </span>
    </div>
    <div class="ip__actions">
      <button type="button" class="ip__btn" id="retry">もう一度インストール</button>
    </div>
  </div>
</div>
</main>

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

// 설치 진행 막대와 단계 문구 — 막대가 매끄럽게 늘지 않는다. linear-gradient 하나를
// 칸(타일) 도안으로 정의하고 background-size 로 타일 폭을 박은 뒤(정지점은 타일 비율:
// 80% 블록 + 20% 줄), 그 위에 트랙색 덮개를 transform: scaleX 로 steps(12, end) 만큼
// 줄여 칸을 하나씩 드러낸다. 칸이 넘어갈 때마다 문구와 남은 용량 숫자가 같은 박자로 컷으로
// 갈아 끼워지고(음수 animation-delay 로 위상을 밀어 한 줄의 키프레임을 열두 장이 나눠 쓴다),
// 다 차면 완료 표시가 한 번 튀어오른다.

$duration: $dur-quick;
$easing: $ease-pop;
$color: $subject-blue-deep;
$tile: 20px;   // 칸 한 칸 = 블록 16px + 줄 4px
$cells: 12;    // 트랙 안 칸 수 — steps(12, end) 의 박자와 1:1 이다
$mono: ui-monospace, SFMono-Regular, "SF Mono", Consolas, "Liberation Mono", monospace;
$edge: rgba(23, 20, 26, .38);
$lite: rgba(255, 255, 255, .95);
$muted: rgba(23, 20, 26, .72);

@include stage($stage-paper);

// ── 설치 대화상자
.ip {
  box-sizing: border-box; width: min(100%, 276px);
  border: 2px solid; border-color: $lite $edge $edge $lite;
  background: $subject-cream; box-shadow: $shadow-raised;
}
.ip button { font-family: inherit; cursor: pointer; }
.ip button:focus-visible { outline: 2px solid $color; outline-offset: 1px; }

// ── 제목줄
.ip__title {
  display: flex; align-items: center; gap: $sp-1;
  height: 24px; padding: 0 $sp-1; box-sizing: border-box;
  background: $color; color: $subject-cream;
}
.ip__tico { display: grid; place-items: center; }
.ip__tname { flex: 1 1 auto; font-weight: 700; font-size: 12px; line-height: 1.4; white-space: nowrap; overflow: hidden; }
.ip__tbtns { display: flex; align-items: center; gap: $sp-1; }
.ip__gb { width: 14px; height: 13px; box-sizing: border-box; border: 2px solid rgba(255, 247, 230, .85); }
.ip__gb--min { border: 0; border-bottom: 2px solid rgba(255, 247, 230, .85); width: 12px; align-self: flex-end; }

// ── 본문
.ip__body { display: flex; flex-direction: column; gap: $sp-2; padding: $sp-3; }

// 진행 트랙 — 눌려 들어간 칸(어두운 면이 위·왼쪽). 안은 정확히 칸 12개 폭이다
.ip__track {
  position: relative; align-self: center; box-sizing: content-box;
  width: $tile * $cells; height: 20px;
  border: 2px solid; border-color: $edge $lite $lite $edge;
  background: $stage-paper;
}
// 칸 도안 — 타일 하나(20px)를 background-size 로 정의하고 정지점은 타일 비율로 준다.
// 정지점만 픽셀로 주면 타일이 아니라 요소 전체 폭의 그라디언트가 된다(실패표 269).
.ip__fill {
  position: absolute; inset: 0;
  background-image: linear-gradient(90deg, $color 0 80%, transparent 80% 100%);
  background-size: $tile 100%;
  background-repeat: repeat-x;
}
// 트랙색 덮개 — 오른쪽에 붙어 scaleX 로 줄어들며 칸을 왼쪽부터 드러낸다.
// 채움 시작 변에 붙어야 하므로 transform-origin 을 오른쪽 가운데로 둔다(중심 아님의 이유)
.ip__cover {
  position: absolute; inset: 0;
  background: $stage-paper;
  transform-origin: right center;
  transform: scaleX(0);
}
// 완료 표시 — 트랙 오른쪽 끝에 얹힌 체크. 정적 기본값은 보임(완료 상태)
.ip__done {
  position: absolute; top: 2px; right: 2px; width: 16px; height: 16px;
  display: grid; place-items: center; color: $stage-paper; z-index: 1;
}

// ── 문구·숫자 줄 — 겹켜진 값 장을 컷으로 갈아 끼운다(정적 기본값은 마지막 장)
.ip__meta {
  display: flex; align-items: baseline; justify-content: space-between;
  align-self: center; width: $tile * $cells;
}
.ip__phrases, .ip__nums { display: grid; }
.ip__phrases > *, .ip__nums > * { grid-area: 1 / 1; }
.ip__phrases { justify-items: start; }
.ip__nums { justify-items: end; }
.ip__sv { font-weight: 700; font-size: 11px; line-height: 1.4; color: $subject-ink; white-space: nowrap; }
.ip__nm { font-family: $mono; font-weight: 700; font-size: 11px; line-height: 1.4; color: $muted; white-space: nowrap; }
.ip__sv, .ip__nm { opacity: 0; }
.ip__sv--5, .ip__nm--12 { opacity: 1; }

// ── 단추
.ip__actions { display: flex; justify-content: flex-end; }
.ip__btn {
  min-width: 88px; height: 26px; box-sizing: border-box; padding: 0 $sp-2;
  background: $subject-cream; color: $subject-ink;
  border: 2px solid; border-color: $lite $edge $edge $lite;
  font-weight: 700; font-size: 11px; line-height: 1.4;
  transition: transform $duration $ease-out;
}
.ip__btn:active { border-color: $edge $lite $lite $edge; transform: translateY(1px); }

// ── 격자 미리보기 루프 (2초): 덮개가 steps(12, end) 로 0 부터 75% 사이에 칸을 하나씩 드러내고
// (칸 박자 6.25% 간격), 문구는 네 박자, 숫자는 칸 박자에 맞춘다. 75% 부터 88% 사이에 완료 표시가
// 튀고, 90% 안에 모든 연출이 빠져 다음 바퀴를 준비한다.
.ip.is-demo .ip__cover {
  animation-name: ipCover;
  animation-duration: $dur-loop; animation-timing-function: steps(12, end);
  animation-iteration-count: infinite; animation-fill-mode: backwards;
}
.ip.is-demo .ip__sv, .ip.is-demo .ip__nm {
  animation-name: ipSv;   // 문구 장: 제자리에서 18.75% 동안 켜진다(네 박자)
  animation-duration: $dur-loop; animation-timing-function: steps(1, end);
  animation-iteration-count: infinite; animation-fill-mode: backwards;
}
.ip.is-demo .ip__nm { animation-name: ipNm; }  // 숫자 장: 6.25% 동안 켜진다(칸 박자)
// 음수 animation-delay — 같은 키프레임을 각자의 박자로 위상 이동해 쓴다(루프마다 같은 간격 유지)
.ip.is-demo .ip__sv--1 { animation-delay: 0ms; }
.ip.is-demo .ip__sv--2 { animation-delay: -1625ms; }
.ip.is-demo .ip__sv--3 { animation-delay: -1250ms; }
.ip.is-demo .ip__sv--4 { animation-delay: -875ms; }
.ip.is-demo .ip__sv--5 { animation-delay: -500ms; }
.ip.is-demo .ip__nm--1 { animation-delay: 0ms; }
.ip.is-demo .ip__nm--2 { animation-delay: -1875ms; }
.ip.is-demo .ip__nm--3 { animation-delay: -1750ms; }
.ip.is-demo .ip__nm--4 { animation-delay: -1625ms; }
.ip.is-demo .ip__nm--5 { animation-delay: -1500ms; }
.ip.is-demo .ip__nm--6 { animation-delay: -1375ms; }
.ip.is-demo .ip__nm--7 { animation-delay: -1250ms; }
.ip.is-demo .ip__nm--8 { animation-delay: -1125ms; }
.ip.is-demo .ip__nm--9 { animation-delay: -1000ms; }
.ip.is-demo .ip__nm--10 { animation-delay: -875ms; }
.ip.is-demo .ip__nm--11 { animation-delay: -750ms; }
.ip.is-demo .ip__nm--12 { animation-delay: -625ms; }
// 완료 표시 — 스스로 완결한 요소라 자기 중심에서 커진다
.ip.is-demo .ip__done {
  animation-name: ipDone;
  animation-duration: $dur-loop; animation-timing-function: $easing;
  animation-iteration-count: infinite; animation-fill-mode: backwards;
}

@keyframes ipCover {
  0% { transform: scaleX(1); }
  75%, 100% { transform: scaleX(0); }
}
@keyframes ipSv {
  0%, 18.75% { opacity: 1; }
  18.76%, 100% { opacity: 0; }
}
@keyframes ipNm {
  0%, 6.25% { opacity: 1; }
  6.26%, 100% { opacity: 0; }
}
@keyframes ipDone {
  0%, 74% { opacity: 0; transform: scale(.3); }
  75% { opacity: 1; transform: scale(.4); }
  80% { transform: scale(1.3); }
  84%, 86% { opacity: 1; transform: scale(1); }
  87%, 100% { opacity: 0; transform: scale(1); }
}

// ── 좁은 화면: 본문 여백을 줄인다(트랙 폭 240px 는 고정 — 칸 도안의 기준이라 못 줄인다)
@media (max-width: 340px) {
  .ip__body { gap: $sp-1; padding: $sp-2; }
}

@media (prefers-reduced-motion: reduce) {
  .ip.is-demo .ip__cover, .ip.is-demo .ip__sv, .ip.is-demo .ip__nm, .ip.is-demo .ip__done {
    animation: none !important;
  }
  .ip.is-demo .ip__cover { transform: scaleX(0) !important; }
  .ip.is-demo .ip__sv, .ip.is-demo .ip__nm { opacity: 0 !important; }
  .ip.is-demo .ip__sv--5, .ip.is-demo .ip__nm--12 { opacity: 1 !important; }
  .ip.is-demo .ip__done { opacity: 1 !important; transform: none !important; }
}

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

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

.ip {
  box-sizing: border-box;
  width: min(100%, 276px);
  border: 2px solid;
  border-color: rgba(255, 255, 255, 0.95) rgba(23, 20, 26, 0.38) rgba(23, 20, 26, 0.38) rgba(255, 255, 255, 0.95);
  background: #fff7e6;
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
}

.ip button {
  font-family: inherit;
  cursor: pointer;
}

.ip button:focus-visible {
  outline: 2px solid #0a4fe8;
  outline-offset: 1px;
}

.ip__title {
  display: flex;
  align-items: center;
  gap: 4px;
  height: 24px;
  padding: 0 4px;
  box-sizing: border-box;
  background: #0a4fe8;
  color: #fff7e6;
}

.ip__tico {
  display: grid;
  place-items: center;
}

.ip__tname {
  flex: 1 1 auto;
  font-weight: 700;
  font-size: 12px;
  line-height: 1.4;
  white-space: nowrap;
  overflow: hidden;
}

.ip__tbtns {
  display: flex;
  align-items: center;
  gap: 4px;
}

.ip__gb {
  width: 14px;
  height: 13px;
  box-sizing: border-box;
  border: 2px solid rgba(255, 247, 230, 0.85);
}

.ip__gb--min {
  border: 0;
  border-bottom: 2px solid rgba(255, 247, 230, 0.85);
  width: 12px;
  align-self: flex-end;
}

.ip__body {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px;
}

.ip__track {
  position: relative;
  align-self: center;
  box-sizing: content-box;
  width: 240px;
  height: 20px;
  border: 2px solid;
  border-color: rgba(23, 20, 26, 0.38) rgba(255, 255, 255, 0.95) rgba(255, 255, 255, 0.95) rgba(23, 20, 26, 0.38);
  background: #ffffff;
}

.ip__fill {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(90deg, #0a4fe8 0 80%, transparent 80% 100%);
  background-size: 20px 100%;
  background-repeat: repeat-x;
}

.ip__cover {
  position: absolute;
  inset: 0;
  background: #ffffff;
  transform-origin: right center;
  transform: scaleX(0);
}

.ip__done {
  position: absolute;
  top: 2px;
  right: 2px;
  width: 16px;
  height: 16px;
  display: grid;
  place-items: center;
  color: #ffffff;
  z-index: 1;
}

.ip__meta {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  align-self: center;
  width: 240px;
}

.ip__phrases, .ip__nums {
  display: grid;
}

.ip__phrases > *, .ip__nums > * {
  grid-area: 1/1;
}

.ip__phrases {
  justify-items: start;
}

.ip__nums {
  justify-items: end;
}

.ip__sv {
  font-weight: 700;
  font-size: 11px;
  line-height: 1.4;
  color: #17141a;
  white-space: nowrap;
}

.ip__nm {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Consolas, "Liberation Mono", monospace;
  font-weight: 700;
  font-size: 11px;
  line-height: 1.4;
  color: rgba(23, 20, 26, 0.72);
  white-space: nowrap;
}

.ip__sv, .ip__nm {
  opacity: 0;
}

.ip__sv--5, .ip__nm--12 {
  opacity: 1;
}

.ip__actions {
  display: flex;
  justify-content: flex-end;
}

.ip__btn {
  min-width: 88px;
  height: 26px;
  box-sizing: border-box;
  padding: 0 8px;
  background: #fff7e6;
  color: #17141a;
  border: 2px solid;
  border-color: rgba(255, 255, 255, 0.95) rgba(23, 20, 26, 0.38) rgba(23, 20, 26, 0.38) rgba(255, 255, 255, 0.95);
  font-weight: 700;
  font-size: 11px;
  line-height: 1.4;
  transition: transform 220ms ease-out;
}

.ip__btn:active {
  border-color: rgba(23, 20, 26, 0.38) rgba(255, 255, 255, 0.95) rgba(255, 255, 255, 0.95) rgba(23, 20, 26, 0.38);
  transform: translateY(1px);
}

.ip.is-demo .ip__cover {
  animation-name: ipCover;
  animation-duration: 2s;
  animation-timing-function: steps(12, end);
  animation-iteration-count: infinite;
  animation-fill-mode: backwards;
}

.ip.is-demo .ip__sv, .ip.is-demo .ip__nm {
  animation-name: ipSv;
  animation-duration: 2s;
  animation-timing-function: steps(1, end);
  animation-iteration-count: infinite;
  animation-fill-mode: backwards;
}

.ip.is-demo .ip__nm {
  animation-name: ipNm;
}

.ip.is-demo .ip__sv--1 {
  animation-delay: 0ms;
}

.ip.is-demo .ip__sv--2 {
  animation-delay: -1625ms;
}

.ip.is-demo .ip__sv--3 {
  animation-delay: -1250ms;
}

.ip.is-demo .ip__sv--4 {
  animation-delay: -875ms;
}

.ip.is-demo .ip__sv--5 {
  animation-delay: -500ms;
}

.ip.is-demo .ip__nm--1 {
  animation-delay: 0ms;
}

.ip.is-demo .ip__nm--2 {
  animation-delay: -1875ms;
}

.ip.is-demo .ip__nm--3 {
  animation-delay: -1750ms;
}

.ip.is-demo .ip__nm--4 {
  animation-delay: -1625ms;
}

.ip.is-demo .ip__nm--5 {
  animation-delay: -1500ms;
}

.ip.is-demo .ip__nm--6 {
  animation-delay: -1375ms;
}

.ip.is-demo .ip__nm--7 {
  animation-delay: -1250ms;
}

.ip.is-demo .ip__nm--8 {
  animation-delay: -1125ms;
}

.ip.is-demo .ip__nm--9 {
  animation-delay: -1000ms;
}

.ip.is-demo .ip__nm--10 {
  animation-delay: -875ms;
}

.ip.is-demo .ip__nm--11 {
  animation-delay: -750ms;
}

.ip.is-demo .ip__nm--12 {
  animation-delay: -625ms;
}

.ip.is-demo .ip__done {
  animation-name: ipDone;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 1.4, 0.4, 1);
  animation-iteration-count: infinite;
  animation-fill-mode: backwards;
}

@keyframes ipCover {
  0% {
    transform: scaleX(1);
  }
  75%, 100% {
    transform: scaleX(0);
  }
}
@keyframes ipSv {
  0%, 18.75% {
    opacity: 1;
  }
  18.76%, 100% {
    opacity: 0;
  }
}
@keyframes ipNm {
  0%, 6.25% {
    opacity: 1;
  }
  6.26%, 100% {
    opacity: 0;
  }
}
@keyframes ipDone {
  0%, 74% {
    opacity: 0;
    transform: scale(0.3);
  }
  75% {
    opacity: 1;
    transform: scale(0.4);
  }
  80% {
    transform: scale(1.3);
  }
  84%, 86% {
    opacity: 1;
    transform: scale(1);
  }
  87%, 100% {
    opacity: 0;
    transform: scale(1);
  }
}
@media (max-width: 340px) {
  .ip__body {
    gap: 4px;
    padding: 8px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .ip.is-demo .ip__cover, .ip.is-demo .ip__sv, .ip.is-demo .ip__nm, .ip.is-demo .ip__done {
    animation: none !important;
  }
  .ip.is-demo .ip__cover {
    transform: scaleX(0) !important;
  }
  .ip.is-demo .ip__sv, .ip.is-demo .ip__nm {
    opacity: 0 !important;
  }
  .ip.is-demo .ip__sv--5, .ip.is-demo .ip__nm--12 {
    opacity: 1 !important;
  }
  .ip.is-demo .ip__done {
    opacity: 1 !important;
    transform: none !important;
  }
}

var root = document.getElementById('ip');
var retry = document.getElementById('retry');
// 사람 손이 닿으면 격자 미리보기 루프를 끊고 완료 상태(정적 기본값)로 돌아간다
root.addEventListener('pointerdown', function () { root.classList.remove('is-demo'); });
// もう一度インストール — 같은 2초 루프를 한 바퀴 돌게 했다가 95% 지점(막대가 다 찬 뒤)에 뗀다
retry.addEventListener('click', function () {
  root.classList.add('is-demo');
  clearTimeout(retry.timer);
  retry.timer = setTimeout(function () { root.classList.remove('is-demo'); }, 1900);
});

// InstallProgress — vanilla 판(run/023/demo/08-os-install-progress-steps/index.html) 의 React 포트.
// 칸 도안은 linear-gradient 하나가 background-size 타일(20px)로 정의하고, 트랙색 덮개가
// transform: scaleX 를 steps(12, end) 만큼 줄여 칸을 하나씩 드러낸다. 문구와 남은 용량 숫자는
// 겹켜진 값 장을 음수 animation-delay 위상으로 컷 갈아 끼운다. 다시 설치 단추는 같은 루프를
// 한 바퀴 돌게 했다가 95% 지점에 뗀다.
import { useEffect, useRef, useState } from "react";
import type { CSSProperties } from "react";
import styles from "./InstallProgress.module.scss";

export type InstallProgressProps = {
  duration?: number;
  easing?: string;
  color?: string;
  titleText?: string;
  retryText?: string;
};

type Vars = CSSProperties & { "--duration"?: string; "--easing"?: string; "--color"?: string };
// useRef<number> 는 { current: number | null } 을 돌려준다 — ambient 타입에 맞춘 상자 타입
type Box<T> = { current: T | null };

const TITLE = "설치 마법사";
const RETRY = "다시 설치";
const PHRASES = ["파일 준비", "복사 중", "설정 저장", "마무리 중", "설치 완료"];
const REMAINS = ["812 MB", "744 MB", "663 MB", "581 MB", "502 MB", "421 MB", "340 MB", "262 MB", "183 MB", "102 MB", "47 MB", "0 MB"];
const REPLAY_MS = 1900;

export default function InstallProgress(props: InstallProgressProps) {
  const duration = props.duration ?? 220;
  const easing = props.easing ?? "cubic-bezier(.2, 1.4, .4, 1)";
  const color = props.color ?? "#0a4fe8";
  const titleText = props.titleText ?? TITLE;
  const retryText = props.retryText ?? RETRY;
  const [preview, setPreview] = useState<boolean>(true);
  const timer = useRef<number>(null) as Box<number>;

  useEffect(() => {
    return () => {
      if (timer.current !== null) window.clearTimeout(timer.current);
    };
  }, []);

  const leave = () => setPreview(false);

  const onRetry = () => {
    // 같은 2초 루프를 한 바퀴 돌게 했다가 95% 지점(막대가 다 찬 뒤)에 뗀다
    setPreview(true);
    if (timer.current !== null) window.clearTimeout(timer.current);
    timer.current = window.setTimeout(() => setPreview(false), REPLAY_MS);
  };

  const vars: Vars = { "--duration": duration + "ms", "--easing": easing, "--color": color };

  return (
    <main className={styles.stage}>
      <div
        className={styles.root + (preview ? " " + styles.isDemo : "")}
        style={vars}
        onPointerDown={leave}
      >
        <div className={styles.title}>
          <span className={styles.tico} aria-hidden="true">
            <svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" viewBox="0 0 256 256">
              <g fill="currentColor">
                <path d="M216 152v48a8 8 0 0 1-8 8H48a8 8 0 0 1-8-8v-48a8 8 0 0 1 8-8h160a8 8 0 0 1 8 8m-8-104H48a8 8 0 0 0-8 8v48a8 8 0 0 0 8 8h160a8 8 0 0 0 8-8V56a8 8 0 0 0-8-8" opacity=".2" />
                <path d="M208 136H48a16 16 0 0 0-16 16v48a16 16 0 0 0 16 16h160a16 16 0 0 0 16-16v-48a16 16 0 0 0-16-16m0 64H48v-48h160zm0-160H48a16 16 0 0 0-16 16v48a16 16 0 0 0 16 16h160a16 16 0 0 0 16-16V56a16 16 0 0 0-16-16m0 64H48V56h160zm-16-24a12 12 0 1 1-12-12a12 12 0 0 1 12 12m0 96a12 12 0 1 1-12-12a12 12 0 0 1 12 12" />
              </g>
            </svg>
          </span>
          <span className={styles.tname}>{titleText}</span>
          <span className={styles.tbtns} aria-hidden="true">
            <span className={styles.gb + " " + styles.gbMin} />
            <span className={styles.gb} />
          </span>
        </div>
        <div className={styles.body}>
          <div className={styles.track}>
            <span className={styles.fill} aria-hidden="true" />
            <span className={styles.cover} aria-hidden="true" />
            <span className={styles.done} aria-hidden="true">
              <svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" viewBox="0 0 256 256">
                <g fill="currentColor">
                  <path d="M224 128a96 96 0 1 1-96-96a96 96 0 0 1 96 96" opacity=".2" />
                  <path d="M173.66 98.34a8 8 0 0 1 0 11.32l-56 56a8 8 0 0 1-11.32 0l-24-24a8 8 0 0 1 11.32-11.32L112 148.69l50.34-50.35a8 8 0 0 1 11.32 0M232 128A104 104 0 1 1 128 24a104.11 104.11 0 0 1 104 104m-16 0a88 88 0 1 0-88 88a88.1 88.1 0 0 0 88-88" />
                </g>
              </svg>
            </span>
          </div>
          <div className={styles.meta}>
            <span className={styles.phrases} aria-hidden="true">
              {PHRASES.map((text, i) => (
                <span key={i} className={styles.sv + " " + styles["sv" + (i + 1)]}>
                  {text}
                </span>
              ))}
            </span>
            <span className={styles.nums} aria-hidden="true">
              {REMAINS.map((text, i) => (
                <span key={i} className={styles.nm + " " + styles["nm" + (i + 1)]}>
                  {text}
                </span>
              ))}
            </span>
          </div>
          <div className={styles.actions}>
            <button type="button" className={styles.btn} onClick={onRetry}>
              {retryText}
            </button>
          </div>
        </div>
      </div>
    </main>
  );
}