09Curtain reveal

<main class="stage">
  <div class="ct-scene is-demo">
    <div class="ct-content" aria-hidden="true">
      <span class="ct-bar ct-bar-title"></span>
      <span class="ct-bar"></span>
      <span class="ct-bar"></span>
      <span class="ct-thumb"></span>
    </div>
    <div class="ct-panel ct-left" aria-hidden="true"><span class="ct-label">Loading</span></div>
    <div class="ct-panel ct-right" aria-hidden="true"></div>
  </div>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: 2s;
$easing: $ease-spring;
$color: $subject-lilac;

@include stage($stage-ink);

// 실사용: 로딩 중에만 .is-loading — 끝나면 클래스를 떼고 커튼을 연 채로 둔다
.ct-scene {
  position: relative;
  width: 252px;
  height: 168px;
  border-radius: $r-card;
  overflow: hidden;
}

.ct-content {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: 1fr 64px;
  grid-template-rows: auto auto auto 1fr;
  gap: $sp-2 $sp-3;
  padding: $sp-4;
}

.ct-bar {
  height: 14px;
  border-radius: $r-pill;
  background: rgba(255, 247, 230, .4);
}
.ct-bar-title {
  height: 20px;
  grid-column: 1 / -1;
  background: rgba(255, 247, 230, .75);
}
.ct-thumb {
  grid-row: 2 / 4;
  grid-column: 2;
  border-radius: $r-sm;
  background: rgba(255, 247, 230, .3);
}

.ct-panel {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 50.5%;   // 살짝 겹쳐 틈이 안 보이게
}
.ct-left  { left: 0;  background: $color; }
.ct-right { right: 0; background: $subject-pink; }

.ct-label {
  position: absolute;
  top: 50%;
  left: 100%;
  transform: translate(-50%, -50%);
  padding: $sp-1 $sp-3;
  border-radius: $r-pill;
  background: rgba(23, 20, 26, .55);
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  font-size: 13px;
  line-height: 1.5;
  color: $subject-cream;
  white-space: nowrap;
}

.is-loading .ct-left,
.is-demo .ct-left  { animation: ct-open-left  $duration $easing infinite; }
.is-loading .ct-right,
.is-demo .ct-right { animation: ct-open-right $duration $easing infinite; }

@keyframes ct-open-left {
  0%, 12%   { transform: translateX(0); }
  38%, 72%  { transform: translateX(-101%); }
  94%, 100% { transform: translateX(0); }
}

@keyframes ct-open-right {
  0%, 12%   { transform: translateX(0); }
  38%, 72%  { transform: translateX(101%); }
  94%, 100% { transform: translateX(0); }
}

@media (prefers-reduced-motion: reduce) {
  .is-loading .ct-left,
  .is-demo .ct-left {
    animation: none !important;
    transform: translateX(-101%) !important;   // 열린 채로 멈춘다
  }
  .is-loading .ct-right,
  .is-demo .ct-right {
    animation: none !important;
    transform: translateX(101%) !important;
  }
}

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);
}

.ct-scene {
  position: relative;
  width: 252px;
  height: 168px;
  border-radius: 16px;
  overflow: hidden;
}

.ct-content {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: 1fr 64px;
  grid-template-rows: auto auto auto 1fr;
  gap: 8px 12px;
  padding: 16px;
}

.ct-bar {
  height: 14px;
  border-radius: 999px;
  background: rgba(255, 247, 230, 0.4);
}

.ct-bar-title {
  height: 20px;
  grid-column: 1/-1;
  background: rgba(255, 247, 230, 0.75);
}

.ct-thumb {
  grid-row: 2/4;
  grid-column: 2;
  border-radius: 8px;
  background: rgba(255, 247, 230, 0.3);
}

.ct-panel {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 50.5%;
}

.ct-left {
  left: 0;
  background: #b9a0ff;
}

.ct-right {
  right: 0;
  background: #ff9ebb;
}

.ct-label {
  position: absolute;
  top: 50%;
  left: 100%;
  transform: translate(-50%, -50%);
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(23, 20, 26, 0.55);
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  font-size: 13px;
  line-height: 1.5;
  color: #fff7e6;
  white-space: nowrap;
}

.is-loading .ct-left,
.is-demo .ct-left {
  animation: ct-open-left 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

.is-loading .ct-right,
.is-demo .ct-right {
  animation: ct-open-right 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

@keyframes ct-open-left {
  0%, 12% {
    transform: translateX(0);
  }
  38%, 72% {
    transform: translateX(-101%);
  }
  94%, 100% {
    transform: translateX(0);
  }
}
@keyframes ct-open-right {
  0%, 12% {
    transform: translateX(0);
  }
  38%, 72% {
    transform: translateX(101%);
  }
  94%, 100% {
    transform: translateX(0);
  }
}
@media (prefers-reduced-motion: reduce) {
  .is-loading .ct-left,
  .is-demo .ct-left {
    animation: none !important;
    transform: translateX(-101%) !important;
  }
  .is-loading .ct-right,
  .is-demo .ct-right {
    animation: none !important;
    transform: translateX(101%) !important;
  }
}

import { CSSProperties } from "react";
import styles from "./CurtainReveal.module.scss";

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

export interface CurtainRevealProps {
  duration?: string;
  easing?: string;
  color?: string;
  /** 반대쪽 커튼 색 */
  altColor?: string;
  /** 커튼 위 알약 문구 */
  label?: string;
}

export default function CurtainReveal({
  duration = "2s",
  easing = "cubic-bezier(.2, .8, .2, 1)",
  color = "#b9a0ff",
  altColor = "#ff9ebb",
  label = "Loading",
}: CurtainRevealProps) {
  const style: Vars & { "--alt-color"?: string } = {
    "--duration": duration,
    "--easing": easing,
    "--color": color,
    "--alt-color": altColor,
  };
  return (
    <div className={styles.scene} style={style}>
      <div className={styles.content} aria-hidden="true">
        <span className={`${styles.bar} ${styles.barTitle}`} />
        <span className={styles.bar} />
        <span className={styles.bar} />
        <span className={styles.thumb} />
      </div>
      <div className={styles.left} aria-hidden="true">
        <span className={styles.label}>{label}</span>
      </div>
      <div className={styles.right} aria-hidden="true" />
    </div>
  );
}