05자막 토글과 자막 스타일

<main class="stage">
  <figure class="pl is-demo" id="pl">
    <div class="pl__screen">
      <div class="pl__stripes" aria-hidden="true"></div>
      <div class="pl__world" aria-hidden="true"><span class="pl__sun"></span><span class="pl__hill pl__hill--a"></span><span class="pl__hill pl__hill--b"></span></div>
      <span class="pl__clock" id="clock">0:12</span>
      <span class="pl__badge">3:00</span>
      <div class="cap" id="cap">
        <span class="cap__l cap__l--1 is-on">영상이 시작됩니다</span>
        <span class="cap__l cap__l--2">자막을 켜 보세요</span>
        <span class="cap__l cap__l--3">스타일을 고를 수 있어요</span>
        <span class="cap__l cap__l--4">이제 준비가 끝났어요</span>
      </div>
      <span class="pl__fillwrap" aria-hidden="true"><span class="pl__fill" id="fill"></span></span>
    </div>
    <div class="pl__bar">
      <button class="cc" type="button" id="cc" aria-pressed="true">
        <span class="cc__ic" aria-hidden="true"><svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" viewBox="0 0 256 256"><g fill="currentColor"><path d="M232 64v128a8 8 0 0 1-8 8H32a8 8 0 0 1-8-8V64a8 8 0 0 1 8-8h192a8 8 0 0 1 8 8" opacity=".2"/><path d="M224 48H32a16 16 0 0 0-16 16v128a16 16 0 0 0 16 16h192a16 16 0 0 0 16-16V64a16 16 0 0 0-16-16m0 144H32V64h192zm-105.07-40.29a8 8 0 0 1-2.93 10.93a40 40 0 1 1 0-69.28a8 8 0 1 1-8 13.85a24 24 0 1 0 0 41.58a8 8 0 0 1 10.93 2.92m80 0a8 8 0 0 1-2.93 10.93a40 40 0 1 1 0-69.28a8 8 0 1 1-8 13.85a24 24 0 1 0 0 41.58a8 8 0 0 1 10.93 2.92"/></g></svg></span>
        <span class="cc__t">자막</span>
      </button>
      <div class="seg" id="seg" role="group" aria-label="자막 스타일">
        <button class="seg__b seg__b--chip is-on" type="button" data-s="chip" aria-pressed="true">바탕칩</button>
        <button class="seg__b seg__b--line" type="button" data-s="line" aria-pressed="false">외곽선</button>
      </div>
      <span class="pl__time"><b id="t-now">0:12</b> / 3:00</span>
    </div>
  </figure>
</main>

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

$duration: $dur-quick;
$easing: $ease-spring;
$color: $subject-blue;

@include stage($stage-ink);

.pl {
  position: relative;
  box-sizing: border-box;
  width: min(392px, 92vw);
  margin: 0;
  border-radius: $r-card;
  background: $subject-cream;
  box-shadow: $shadow-raised;
  overflow: hidden;
}

// ── 화면 ──
.pl__screen {
  position: relative;
  height: clamp(96px, 26vw, 140px);
  overflow: hidden;
  background: linear-gradient(180deg, rgba(47, 109, 246, .32), rgba(255, 247, 230, .96));
}
.pl__stripes {
  position: absolute;
  inset: 0 -72px;
  background: repeating-linear-gradient(90deg, rgba(23, 20, 26, .14) 0 12px, transparent 12px 32px);
  animation-name: pl-pan;
  animation-duration: $dur-loop;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
}
@keyframes pl-pan { from { transform: translateX(0); } to { transform: translateX(-64px); } }
.pl__world { position: absolute; inset: 0; }
.pl__sun {
  position: absolute; right: 18%; top: 12%;
  width: 26px; height: 26px; border-radius: 50%;
  background: rgba(255, 210, 63, .95);
  box-shadow: 0 0 0 8px rgba(255, 210, 63, .25);
}
.pl__hill { position: absolute; bottom: -46%; height: 82%; border-radius: 50%; }
.pl__hill--a { left: -14%; width: 72%; background: rgba(23, 20, 26, .15); }
.pl__hill--b { right: -18%; width: 62%; background: rgba(23, 20, 26, .09); }

.pl__clock, .pl__badge {
  position: absolute; top: $sp-2;
  padding: $sp-1 $sp-2;
  border-radius: $r-xs;
  background: rgba(23, 20, 26, .62);
  font-family: ui-monospace, "Cascadia Mono", Menlo, Consolas, monospace;
  font-size: 10px; line-height: 14px; font-weight: 700;
}
.pl__clock { left: $sp-2; color: #fff; }
.pl__badge { right: $sp-2; color: rgba(255, 255, 255, .85); }

.pl__fillwrap { position: absolute; left: 0; right: 0; bottom: 0; height: 6px; background: rgba(255, 255, 255, .28); }
.pl__fill {
  display: block; height: 100%;
  background: $color;
  transform-origin: left center; // 규칙8: 좌변서 차오름
  transform: scaleX(.07);
}

// ── 자막 줄 (네 문장이 같은 칸에 겹쳐 쌓인다 — 한 번에 하나만 보인다) ──
.cap {
  position: absolute;
  left: 0; right: 0; bottom: $sp-4;
  display: grid;
  place-items: center;
  opacity: 1;
  transition: opacity $duration $easing;
}
.pl.is-off .cap { opacity: 0; }
.cap__l {
  grid-area: 1 / 1;
  box-sizing: border-box;
  max-width: 92%;
  padding: $sp-1 $sp-2;
  border-radius: $r-pill;
  background-color: rgba(23, 20, 26, .72);
  color: #fff;
  font-size: clamp(10px, 2.9vw, 13px);
  line-height: 16px;
  font-weight: 700;
  white-space: nowrap;
  text-shadow: 0 0 0 rgba(23, 20, 26, 0), 0 0 0 rgba(23, 20, 26, 0), 0 0 0 rgba(23, 20, 26, 0), 0 0 0 rgba(23, 20, 26, 0);
  opacity: 0;
  transform: translateY(10px);
  transition: opacity $duration $easing, transform $duration $easing;
}
.cap__l.is-on { opacity: 1; transform: none; }
.pl.is-outline .cap__l {
  background-color: rgba(23, 20, 26, 0);
  text-shadow: 1px 1px 0 rgba(23, 20, 26, .95), -1px 1px 0 rgba(23, 20, 26, .95), 1px -1px 0 rgba(23, 20, 26, .95), -1px -1px 0 rgba(23, 20, 26, .95);
}

// ── 조작 줄 ──
.pl__bar {
  display: flex;
  align-items: center;
  gap: $sp-2;
  padding: $sp-2;
  border-top: 1px solid rgba(23, 20, 26, .12);
  background: $subject-cream;
}
.cc {
  box-sizing: border-box;
  height: 32px;
  flex: 0 0 auto;
  display: inline-flex; align-items: center; gap: $sp-1;
  padding: 0 $sp-2;
  border: 0;
  border-radius: $r-control;
  background: $color;
  color: #fff;
  cursor: pointer;
  font-size: 12px; line-height: 16px; font-weight: 700;
  transition: background $duration $easing, color $duration $easing;
}
.cc[aria-pressed="false"] { background: rgba(23, 20, 26, .1); color: $subject-ink; }
.cc:focus-visible { outline: 2px solid $stage-yellow; outline-offset: 2px; }
.cc__ic { display: inline-flex; }

.seg { display: flex; align-items: center; gap: $sp-1; }
.seg__b {
  box-sizing: border-box;
  height: 28px;
  flex: 0 0 auto;
  display: inline-flex; align-items: center;
  padding: 0 $sp-2;
  border: 0;
  border-radius: $r-pill;
  background-color: rgba(23, 20, 26, .1);
  color: $subject-ink;
  cursor: pointer;
  font-size: 11px; line-height: 14px; font-weight: 700;
  transition: background-color $duration $easing, color $duration $easing;
}
.seg__b.is-on { background-color: $subject-ink; color: #fff; }
.seg__b:focus-visible { outline: 2px solid $stage-yellow; outline-offset: 2px; }

.pl__time {
  margin-left: auto;
  color: rgba(23, 20, 26, .66);
  font-family: ui-monospace, "Cascadia Mono", Menlo, Consolas, monospace;
  font-size: 10px; line-height: 14px; font-weight: 600;
}
.pl__time b { color: $subject-ink; font-weight: 700; }

// ── 자동 루프: 2초 안에 네 문장이 아래에서 올라오며 갈아 끼워지고, 절반 지점에서 스타일이 바뀐다 ──
// 문장 교체는 steps(1, end) 로 한 프레임 컷 — 두 문장이 절대 겹치지 않는다. 부드러움은 등장 rise 로만.
.pl.is-demo .cap__l--1 {
  animation-name: cap-1, cap-style;
  animation-duration: $dur-loop, $dur-loop;
  animation-timing-function: $easing, steps(1, end);
  animation-iteration-count: infinite, infinite;
}
.pl.is-demo .cap__l--2 {
  animation-name: cap-2, cap-style;
  animation-duration: $dur-loop, $dur-loop;
  animation-timing-function: $easing, steps(1, end);
  animation-iteration-count: infinite, infinite;
}
.pl.is-demo .cap__l--3 {
  animation-name: cap-3, cap-style;
  animation-duration: $dur-loop, $dur-loop;
  animation-timing-function: $easing, steps(1, end);
  animation-iteration-count: infinite, infinite;
}
.pl.is-demo .cap__l--4 {
  animation-name: cap-4, cap-style;
  animation-duration: $dur-loop, $dur-loop;
  animation-timing-function: $easing, steps(1, end);
  animation-iteration-count: infinite, infinite;
}
// 자막 교체: opacity 는 0.01% 폭으로 **컷**하고(두 문장이 겹치는 프레임도, 아무 문장도 없는 프레임도 없다),
// 부드러움은 translateY 등장 rise 로만 준다. 예전 판은 나가는 문장과 들어오는 문장 사이에 빈 구간이 있어
// 정확히 25% 지점 프레임(24프레임 중 7번째)이 자막 없는 빈 화면이었고 그게 poster 로 뽑혔다 (실측 2026-09-12)
@keyframes cap-1 {
  0%, 21.99% { opacity: 1; transform: none; }
  22%, 87.99% { opacity: 0; transform: translateY(10px); }
  88% { opacity: 1; transform: translateY(10px); }
  93%, 100% { opacity: 1; transform: none; }
}
@keyframes cap-2 {
  0%, 21.99% { opacity: 0; transform: translateY(10px); }
  22% { opacity: 1; transform: translateY(10px); }
  27%, 43.99% { opacity: 1; transform: none; }
  44%, 100% { opacity: 0; transform: translateY(10px); }
}
@keyframes cap-3 {
  0%, 43.99% { opacity: 0; transform: translateY(10px); }
  44% { opacity: 1; transform: translateY(10px); }
  49%, 65.99% { opacity: 1; transform: none; }
  66%, 100% { opacity: 0; transform: translateY(10px); }
}
@keyframes cap-4 {
  0%, 65.99% { opacity: 0; transform: translateY(10px); }
  66% { opacity: 1; transform: translateY(10px); }
  71%, 87.99% { opacity: 1; transform: none; }
  88%, 100% { opacity: 0; transform: translateY(10px); }
}
@keyframes cap-style {
  0%, 49% {
    background-color: rgba(23, 20, 26, .72);
    text-shadow: 0 0 0 rgba(23, 20, 26, 0), 0 0 0 rgba(23, 20, 26, 0), 0 0 0 rgba(23, 20, 26, 0), 0 0 0 rgba(23, 20, 26, 0);
  }
  50%, 87% {
    background-color: rgba(23, 20, 26, 0);
    text-shadow: 1px 1px 0 rgba(23, 20, 26, .95), -1px 1px 0 rgba(23, 20, 26, .95), 1px -1px 0 rgba(23, 20, 26, .95), -1px -1px 0 rgba(23, 20, 26, .95);
  }
  88%, 100% {
    background-color: rgba(23, 20, 26, .72);
    text-shadow: 0 0 0 rgba(23, 20, 26, 0), 0 0 0 rgba(23, 20, 26, 0), 0 0 0 rgba(23, 20, 26, 0), 0 0 0 rgba(23, 20, 26, 0);
  }
}

.pl.is-demo .seg__b--chip {
  animation-name: seg-chip;
  animation-duration: $dur-loop;
  animation-timing-function: steps(1, end);
  animation-iteration-count: infinite;
}
.pl.is-demo .seg__b--line {
  animation-name: seg-line;
  animation-duration: $dur-loop;
  animation-timing-function: steps(1, end);
  animation-iteration-count: infinite;
}
@keyframes seg-chip {
  0%, 49% { background-color: $subject-ink; color: #fff; }
  50%, 87% { background-color: rgba(23, 20, 26, .1); color: $subject-ink; }
  88%, 100% { background-color: $subject-ink; color: #fff; }
}
@keyframes seg-line {
  0%, 49% { background-color: rgba(23, 20, 26, .1); color: $subject-ink; }
  50%, 87% { background-color: $subject-ink; color: #fff; }
  88%, 100% { background-color: rgba(23, 20, 26, .1); color: $subject-ink; }
}

.pl.is-demo .pl__fill {
  animation-name: cap-fill;
  animation-duration: $dur-loop;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
}
@keyframes cap-fill {
  0% { transform: scaleX(.07); }
  88%, 100% { transform: scaleX(.62); }
}

// ── 좁은 화면: 간격을 올리지 않는다. 덜 중요한 것을 뺀다 ──
@media (max-width: 340px) {
  .pl__time { display: none; }
  .cap__l { line-height: 14px; }
  .cc { font-size: 11px; }
  .seg__b { font-size: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  .pl.is-demo .cap__l--1, .pl.is-demo .cap__l--2, .pl.is-demo .cap__l--3, .pl.is-demo .cap__l--4,
  .pl.is-demo .seg__b--chip, .pl.is-demo .seg__b--line, .pl.is-demo .pl__fill,
  .pl__stripes { animation: none !important; }
  .cap, .cap__l, .cc, .seg__b { transition: none; }
}

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

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #17141a;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.pl {
  position: relative;
  box-sizing: border-box;
  width: min(392px, 92vw);
  margin: 0;
  border-radius: 16px;
  background: #fff7e6;
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
  overflow: hidden;
}

.pl__screen {
  position: relative;
  height: clamp(96px, 26vw, 140px);
  overflow: hidden;
  background: linear-gradient(180deg, rgba(47, 109, 246, 0.32), rgba(255, 247, 230, 0.96));
}

.pl__stripes {
  position: absolute;
  inset: 0 -72px;
  background: repeating-linear-gradient(90deg, rgba(23, 20, 26, 0.14) 0 12px, transparent 12px 32px);
  animation-name: pl-pan;
  animation-duration: 2s;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
}

@keyframes pl-pan {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-64px);
  }
}
.pl__world {
  position: absolute;
  inset: 0;
}

.pl__sun {
  position: absolute;
  right: 18%;
  top: 12%;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: rgba(255, 210, 63, 0.95);
  box-shadow: 0 0 0 8px rgba(255, 210, 63, 0.25);
}

.pl__hill {
  position: absolute;
  bottom: -46%;
  height: 82%;
  border-radius: 50%;
}

.pl__hill--a {
  left: -14%;
  width: 72%;
  background: rgba(23, 20, 26, 0.15);
}

.pl__hill--b {
  right: -18%;
  width: 62%;
  background: rgba(23, 20, 26, 0.09);
}

.pl__clock, .pl__badge {
  position: absolute;
  top: 8px;
  padding: 4px 8px;
  border-radius: 4px;
  background: rgba(23, 20, 26, 0.62);
  font-family: ui-monospace, "Cascadia Mono", Menlo, Consolas, monospace;
  font-size: 10px;
  line-height: 14px;
  font-weight: 700;
}

.pl__clock {
  left: 8px;
  color: #fff;
}

.pl__badge {
  right: 8px;
  color: rgba(255, 255, 255, 0.85);
}

.pl__fillwrap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 6px;
  background: rgba(255, 255, 255, 0.28);
}

.pl__fill {
  display: block;
  height: 100%;
  background: #2f6df6;
  transform-origin: left center;
  transform: scaleX(0.07);
}

.cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 16px;
  display: grid;
  place-items: center;
  opacity: 1;
  transition: opacity 220ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.pl.is-off .cap {
  opacity: 0;
}

.cap__l {
  grid-area: 1/1;
  box-sizing: border-box;
  max-width: 92%;
  padding: 4px 8px;
  border-radius: 999px;
  background-color: rgba(23, 20, 26, 0.72);
  color: #fff;
  font-size: clamp(10px, 2.9vw, 13px);
  line-height: 16px;
  font-weight: 700;
  white-space: nowrap;
  text-shadow: 0 0 0 rgba(23, 20, 26, 0), 0 0 0 rgba(23, 20, 26, 0), 0 0 0 rgba(23, 20, 26, 0), 0 0 0 rgba(23, 20, 26, 0);
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 220ms cubic-bezier(0.2, 0.8, 0.2, 1), transform 220ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.cap__l.is-on {
  opacity: 1;
  transform: none;
}

.pl.is-outline .cap__l {
  background-color: rgba(23, 20, 26, 0);
  text-shadow: 1px 1px 0 rgba(23, 20, 26, 0.95), -1px 1px 0 rgba(23, 20, 26, 0.95), 1px -1px 0 rgba(23, 20, 26, 0.95), -1px -1px 0 rgba(23, 20, 26, 0.95);
}

.pl__bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px;
  border-top: 1px solid rgba(23, 20, 26, 0.12);
  background: #fff7e6;
}

.cc {
  box-sizing: border-box;
  height: 32px;
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 0 8px;
  border: 0;
  border-radius: 12px;
  background: #2f6df6;
  color: #fff;
  cursor: pointer;
  font-size: 12px;
  line-height: 16px;
  font-weight: 700;
  transition: background 220ms cubic-bezier(0.2, 0.8, 0.2, 1), color 220ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.cc[aria-pressed=false] {
  background: rgba(23, 20, 26, 0.1);
  color: #17141a;
}

.cc:focus-visible {
  outline: 2px solid #ffd23f;
  outline-offset: 2px;
}

.cc__ic {
  display: inline-flex;
}

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

.seg__b {
  box-sizing: border-box;
  height: 28px;
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  padding: 0 8px;
  border: 0;
  border-radius: 999px;
  background-color: rgba(23, 20, 26, 0.1);
  color: #17141a;
  cursor: pointer;
  font-size: 11px;
  line-height: 14px;
  font-weight: 700;
  transition: background-color 220ms cubic-bezier(0.2, 0.8, 0.2, 1), color 220ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.seg__b.is-on {
  background-color: #17141a;
  color: #fff;
}

.seg__b:focus-visible {
  outline: 2px solid #ffd23f;
  outline-offset: 2px;
}

.pl__time {
  margin-left: auto;
  color: rgba(23, 20, 26, 0.66);
  font-family: ui-monospace, "Cascadia Mono", Menlo, Consolas, monospace;
  font-size: 10px;
  line-height: 14px;
  font-weight: 600;
}

.pl__time b {
  color: #17141a;
  font-weight: 700;
}

.pl.is-demo .cap__l--1 {
  animation-name: cap-1, cap-style;
  animation-duration: 2s, 2s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1), steps(1, end);
  animation-iteration-count: infinite, infinite;
}

.pl.is-demo .cap__l--2 {
  animation-name: cap-2, cap-style;
  animation-duration: 2s, 2s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1), steps(1, end);
  animation-iteration-count: infinite, infinite;
}

.pl.is-demo .cap__l--3 {
  animation-name: cap-3, cap-style;
  animation-duration: 2s, 2s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1), steps(1, end);
  animation-iteration-count: infinite, infinite;
}

.pl.is-demo .cap__l--4 {
  animation-name: cap-4, cap-style;
  animation-duration: 2s, 2s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1), steps(1, end);
  animation-iteration-count: infinite, infinite;
}

@keyframes cap-1 {
  0%, 21.99% {
    opacity: 1;
    transform: none;
  }
  22%, 87.99% {
    opacity: 0;
    transform: translateY(10px);
  }
  88% {
    opacity: 1;
    transform: translateY(10px);
  }
  93%, 100% {
    opacity: 1;
    transform: none;
  }
}
@keyframes cap-2 {
  0%, 21.99% {
    opacity: 0;
    transform: translateY(10px);
  }
  22% {
    opacity: 1;
    transform: translateY(10px);
  }
  27%, 43.99% {
    opacity: 1;
    transform: none;
  }
  44%, 100% {
    opacity: 0;
    transform: translateY(10px);
  }
}
@keyframes cap-3 {
  0%, 43.99% {
    opacity: 0;
    transform: translateY(10px);
  }
  44% {
    opacity: 1;
    transform: translateY(10px);
  }
  49%, 65.99% {
    opacity: 1;
    transform: none;
  }
  66%, 100% {
    opacity: 0;
    transform: translateY(10px);
  }
}
@keyframes cap-4 {
  0%, 65.99% {
    opacity: 0;
    transform: translateY(10px);
  }
  66% {
    opacity: 1;
    transform: translateY(10px);
  }
  71%, 87.99% {
    opacity: 1;
    transform: none;
  }
  88%, 100% {
    opacity: 0;
    transform: translateY(10px);
  }
}
@keyframes cap-style {
  0%, 49% {
    background-color: rgba(23, 20, 26, 0.72);
    text-shadow: 0 0 0 rgba(23, 20, 26, 0), 0 0 0 rgba(23, 20, 26, 0), 0 0 0 rgba(23, 20, 26, 0), 0 0 0 rgba(23, 20, 26, 0);
  }
  50%, 87% {
    background-color: rgba(23, 20, 26, 0);
    text-shadow: 1px 1px 0 rgba(23, 20, 26, 0.95), -1px 1px 0 rgba(23, 20, 26, 0.95), 1px -1px 0 rgba(23, 20, 26, 0.95), -1px -1px 0 rgba(23, 20, 26, 0.95);
  }
  88%, 100% {
    background-color: rgba(23, 20, 26, 0.72);
    text-shadow: 0 0 0 rgba(23, 20, 26, 0), 0 0 0 rgba(23, 20, 26, 0), 0 0 0 rgba(23, 20, 26, 0), 0 0 0 rgba(23, 20, 26, 0);
  }
}
.pl.is-demo .seg__b--chip {
  animation-name: seg-chip;
  animation-duration: 2s;
  animation-timing-function: steps(1, end);
  animation-iteration-count: infinite;
}

.pl.is-demo .seg__b--line {
  animation-name: seg-line;
  animation-duration: 2s;
  animation-timing-function: steps(1, end);
  animation-iteration-count: infinite;
}

@keyframes seg-chip {
  0%, 49% {
    background-color: #17141a;
    color: #fff;
  }
  50%, 87% {
    background-color: rgba(23, 20, 26, 0.1);
    color: #17141a;
  }
  88%, 100% {
    background-color: #17141a;
    color: #fff;
  }
}
@keyframes seg-line {
  0%, 49% {
    background-color: rgba(23, 20, 26, 0.1);
    color: #17141a;
  }
  50%, 87% {
    background-color: #17141a;
    color: #fff;
  }
  88%, 100% {
    background-color: rgba(23, 20, 26, 0.1);
    color: #17141a;
  }
}
.pl.is-demo .pl__fill {
  animation-name: cap-fill;
  animation-duration: 2s;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
}

@keyframes cap-fill {
  0% {
    transform: scaleX(0.07);
  }
  88%, 100% {
    transform: scaleX(0.62);
  }
}
@media (max-width: 340px) {
  .pl__time {
    display: none;
  }
  .cap__l {
    line-height: 14px;
  }
  .cc {
    font-size: 11px;
  }
  .seg__b {
    font-size: 10px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .pl.is-demo .cap__l--1, .pl.is-demo .cap__l--2, .pl.is-demo .cap__l--3, .pl.is-demo .cap__l--4,
  .pl.is-demo .seg__b--chip, .pl.is-demo .seg__b--line, .pl.is-demo .pl__fill,
  .pl__stripes {
    animation: none !important;
  }
  .cap, .cap__l, .cc, .seg__b {
    transition: none;
  }
}

// 실제 동작: CC 버튼으로 자막을 켜고 끄고, 세그먼트로 자막 스타일을 고른다. 더미 재생 시계가 문장을 갈아 끼운다.
var root = document.getElementById('pl'), cc = document.getElementById('cc'),
    seg = document.getElementById('seg'), clock = document.getElementById('clock'),
    now = document.getElementById('t-now'), fill = document.getElementById('fill'),
    lines = root.querySelectorAll('.cap__l');
var DUR = 180, t = 12, last = Date.now();
function fmt(s) { s = Math.floor(s); return Math.floor(s / 60) + ':' + ('0' + (s % 60)).slice(-2); }
function show(n) {
  var i = n % lines.length;
  for (var k = 0; k < lines.length; k++) lines[k].classList.toggle('is-on', k === i);
}
function calm() { if (root.classList.contains('is-demo')) root.classList.remove('is-demo'); }
setInterval(function () {
  var n = Date.now();
  t = (t + (n - last) / 1000) % DUR;
  last = n;
  clock.textContent = fmt(t);
  now.textContent = fmt(t);
  fill.style.transform = 'scaleX(' + (t / DUR).toFixed(4) + ')';
  if (!root.classList.contains('is-demo')) show(Math.floor(t / 2));
}, 250);
cc.addEventListener('click', function () {
  calm();
  var on = cc.getAttribute('aria-pressed') !== 'true';
  cc.setAttribute('aria-pressed', String(on));
  root.classList.toggle('is-off', !on);
});
seg.addEventListener('click', function (e) {
  var b = e.target.closest ? e.target.closest('.seg__b') : null;
  if (!b) return;
  calm();
  var bs = seg.querySelectorAll('.seg__b');
  for (var k = 0; k < bs.length; k++) {
    var on = bs[k] === b;
    bs[k].setAttribute('aria-pressed', String(on));
    bs[k].classList.toggle('is-on', on);
  }
  root.classList.toggle('is-outline', b.getAttribute('data-s') === 'line');
});

import { useEffect, useState } from "react";
import type { CSSProperties } from "react";
import styles from "./CaptionToggle.module.scss";

export type CaptionToggleProps = {
  /** 더미 영상 길이(초) */
  total?: number;
  /** 시작 위치(초) */
  start?: number;
  /** 돌려 가며 보여 줄 자막 문장 */
  lines?: string[];
  duration?: number;
  easing?: string;
  color?: string;
};

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

function fmt(s: number) {
  const n = Math.floor(s);
  return Math.floor(n / 60) + ":" + ("0" + (n % 60)).slice(-2);
}

function CcIcon() {
  return (
    <svg viewBox="0 0 256 256" width="18" height="18" aria-hidden="true">
      <g fill="currentColor">
        <path d="M232 64v128a8 8 0 0 1-8 8H32a8 8 0 0 1-8-8V64a8 8 0 0 1 8-8h192a8 8 0 0 1 8 8" opacity=".2" />
        <path d="M224 48H32a16 16 0 0 0-16 16v128a16 16 0 0 0 16 16h192a16 16 0 0 0 16-16V64a16 16 0 0 0-16-16m0 144H32V64h192zm-105.07-40.29a8 8 0 0 1-2.93 10.93a40 40 0 1 1 0-69.28a8 8 0 1 1-8 13.85a24 24 0 1 0 0 41.58a8 8 0 0 1 10.93 2.92m80 0a8 8 0 0 1-2.93 10.93a40 40 0 1 1 0-69.28a8 8 0 1 1-8 13.85a24 24 0 1 0 0 41.58a8 8 0 0 1 10.93 2.92" />
      </g>
    </svg>
  );
}

export default function CaptionToggle({
  total = 180,
  start = 12,
  lines = ["영상이 시작됩니다", "자막을 켜 보세요", "스타일을 고를 수 있어요", "이제 준비가 끝났어요"],
  duration = 220,
  easing = "cubic-bezier(.2,.8,.2,1)",
  color = "#2f6df6",
}: CaptionToggleProps) {
  const [on, setOn] = useState(true);
  const [outline, setOutline] = useState(false);
  const [t, setT] = useState(start);

  // 더미 재생 시계 — 바닐라의 setInterval(250ms) 과 같은 방식(경과 시간으로 걷는다)
  useEffect(() => {
    let last = Date.now();
    const id = setInterval(() => {
      const n = Date.now();
      const step = (n - last) / 1000;
      last = n;
      setT((p) => (p + step) % total);
    }, 250);
    return () => clearInterval(id);
  }, [total]);

  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };
  // 시계가 2초마다 문장을 갈아 끼운다
  const cur = Math.floor(t / 2) % lines.length;

  return (
    <figure
      className={`${styles.player} ${on ? "" : styles.isOff} ${outline ? styles.isOutline : ""}`}
      style={vars}
    >
      <div className={styles.screen}>
        <div className={styles.stripes} aria-hidden="true" />
        <div className={styles.world} aria-hidden="true">
          <span className={styles.sun} />
          <span className={`${styles.hill} ${styles.hillA}`} />
          <span className={`${styles.hill} ${styles.hillB}`} />
        </div>
        <span className={styles.clock}>{fmt(t)}</span>
        <span className={styles.badge}>{fmt(total)}</span>
        <div className={styles.cap}>
          {lines.map((l, k) => (
            <span key={l} className={`${styles.line} ${k === cur ? styles.isOn : ""}`}>
              {l}
            </span>
          ))}
        </div>
        <span className={styles.fillwrap} aria-hidden="true">
          <span className={styles.fill} style={{ transform: `scaleX(${(t / total).toFixed(4)})` }} />
        </span>
      </div>
      <div className={styles.bar}>
        <button
          className={styles.cc}
          type="button"
          aria-pressed={on}
          onClick={() => setOn((v) => !v)}
        >
          <span className={styles.ccIc} aria-hidden="true">
            <CcIcon />
          </span>
          <span>자막</span>
        </button>
        <div className={styles.seg} role="group" aria-label="자막 스타일">
          <button
            className={`${styles.segBtn} ${outline ? "" : styles.isOn}`}
            type="button"
            aria-pressed={!outline}
            onClick={() => setOutline(false)}
          >
            바탕칩
          </button>
          <button
            className={`${styles.segBtn} ${outline ? styles.isOn : ""}`}
            type="button"
            aria-pressed={outline}
            onClick={() => setOutline(true)}
          >
            외곽선
          </button>
        </div>
        <span className={styles.time}>
          <b>{fmt(t)}</b> / {fmt(total)}
        </span>
      </div>
    </figure>
  );
}