08Limited-stock bar badge

<main class="stage is-demo">
  <div class="badge" aria-label="3 left in stock">
    <span class="label">3 LEFT</span>
    <span class="track"><span class="fill"></span></span>
  </div>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: $dur-loop;   // 2s — 재고바가 줄어드는 한 주기
$easing: $ease-out;
$color: #50a26e;        // 재고 넉넉함(시작 색)

@include stage($stage-paper);

.badge {
  width: 148px;
  padding: $sp-3 $sp-4;
  border-radius: $r-card;
  background: $subject-ink;
  box-shadow: $shadow-raised;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
}

.label {
  display: block;
  margin-bottom: $sp-2;
  color: #fff;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: .04em;
}

.track {
  display: block;
  width: 100%; height: $sp-2;
  border-radius: $r-xs;
  background: rgba(255, 255, 255, .15);
  overflow: hidden;
}

.fill {
  display: block;
  width: 100%; height: 100%;
  border-radius: $r-xs;
  background: $color;
  transform: scaleX(1);
  transform-origin: left; // 규칙8: 재고게이지 left 기준
}

.stage.is-demo .fill {
  animation: drain $duration $easing infinite;
}

@keyframes drain {
  0%, 10% { transform: scaleX(1); background: $color; }
  50% { transform: scaleX(.6); background: $stage-orange; }
  90%, 100% { transform: scaleX(.25); background: $error; }
}

@media (prefers-reduced-motion: reduce) {
  .stage.is-demo .fill { animation: none; transform: scaleX(.25); background: $error; }
}

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);
}

.badge {
  width: 148px;
  padding: 12px 16px;
  border-radius: 16px;
  background: #17141a;
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
}

.label {
  display: block;
  margin-bottom: 8px;
  color: #fff;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.04em;
}

.track {
  display: block;
  width: 100%;
  height: 8px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.15);
  overflow: hidden;
}

.fill {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 4px;
  background: #50a26e;
  transform: scaleX(1);
  transform-origin: left;
}

.stage.is-demo .fill {
  animation: drain 2s ease-out infinite;
}

@keyframes drain {
  0%, 10% {
    transform: scaleX(1);
    background: #50a26e;
  }
  50% {
    transform: scaleX(0.6);
    background: #ff4d1f;
  }
  90%, 100% {
    transform: scaleX(0.25);
    background: #c2361a;
  }
}
@media (prefers-reduced-motion: reduce) {
  .stage.is-demo .fill {
    animation: none;
    transform: scaleX(0.25);
    background: #c2361a;
  }
}

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

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

export default function BadgeLimitedStock({
  duration = 2000,
  easing = "ease-out",
  color = "#16a34a",
  left = 3,
}: BadgeLimitedStockProps) {
  const vars: CSSProperties = { "--duration": `${duration}ms`, "--easing": easing, "--color": color } as CSSProperties;
  return (
    <div className={styles.badge} style={vars} aria-label={`${left} left in stock`}>
      <span className={styles.label}>{left} LEFT</span>
      <span className={styles.track}>
        <span className={styles.fill} />
      </span>
    </div>
  );
}