07Reveal price card

<main class="stage">
  <div class="rp-card is-demo">
    <div class="rp-card__inner">
      <div class="rp-card__face rp-card__face--front">
        <span class="rp-price">$49</span>
        <span class="rp-label">List price</span>
      </div>
      <div class="rp-card__face rp-card__face--back">
        <span class="rp-price">$29</span>
        <span class="rp-label">Today only</span>
      </div>
    </div>
  </div>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: $dur-quick * 1.5;
$easing: $ease-spring;
$color: $subject-blue;

@include stage($stage-orange);

.rp-card {
  perspective: 700px;
  width: 150px;
  height: 100px;
}

.rp-card__inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform $duration $easing;
}
.rp-card:hover .rp-card__inner { transform: rotateY(180deg); }

.rp-card__face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: $sp-1;
  border-radius: $r-card;
  backface-visibility: hidden;
  box-shadow: $shadow-raised;
}
.rp-card__face--front { background: $subject-cream; }
.rp-card__face--back { background: $subject-blue-deep; transform: rotateY(180deg); }

.rp-price { font: 700 24px/1 -apple-system, "Segoe UI", sans-serif; color: $subject-ink; }
.rp-card__face--back .rp-price { color: $subject-cream; }
.rp-label { font: 600 11px/1 -apple-system, sans-serif; opacity: .6; color: $subject-ink; }
.rp-card__face--back .rp-label { color: $subject-cream; opacity: .8; }

// 데모 루프
@keyframes rp-flip {
  0%, 40% { transform: rotateY(0); }
  60%, 100% { transform: rotateY(180deg); }
}
.rp-card.is-demo .rp-card__inner { animation: rp-flip $duration * 2.6 $easing infinite; }

@media (prefers-reduced-motion: reduce) {
  .rp-card:hover .rp-card__inner,
  .rp-card.is-demo .rp-card__inner { animation: none !important; transition: none !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: #ff4d1f;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.rp-card {
  perspective: 700px;
  width: 150px;
  height: 100px;
}

.rp-card__inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 330ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.rp-card:hover .rp-card__inner {
  transform: rotateY(180deg);
}

.rp-card__face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  border-radius: 16px;
  backface-visibility: hidden;
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
}

.rp-card__face--front {
  background: #fff7e6;
}

.rp-card__face--back {
  background: #0a4fe8;
  transform: rotateY(180deg);
}

.rp-price {
  font: 700 24px/1 -apple-system, "Segoe UI", sans-serif;
  color: #17141a;
}

.rp-card__face--back .rp-price {
  color: #fff7e6;
}

.rp-label {
  font: 600 11px/1 -apple-system, sans-serif;
  opacity: 0.6;
  color: #17141a;
}

.rp-card__face--back .rp-label {
  color: #fff7e6;
  opacity: 0.8;
}

@keyframes rp-flip {
  0%, 40% {
    transform: rotateY(0);
  }
  60%, 100% {
    transform: rotateY(180deg);
  }
}
.rp-card.is-demo .rp-card__inner {
  animation: rp-flip 858ms cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

@media (prefers-reduced-motion: reduce) {
  .rp-card:hover .rp-card__inner,
  .rp-card.is-demo .rp-card__inner {
    animation: none !important;
    transition: none !important;
    transform: none !important;
  }
}

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

export interface RevealPriceCardProps {
  duration?: string;
  easing?: string;
  listPrice?: string;
  salePrice?: string;
  saleLabel?: string;
}

export default function RevealPriceCard({
  duration = "330ms",
  easing = "cubic-bezier(.2, .8, .2, 1)",
  listPrice = "$49",
  salePrice = "$29",
  saleLabel = "Today only",
}: RevealPriceCardProps) {
  const style = { "--duration": duration, "--easing": easing } as CSSProperties;
  return (
    <div className={styles.card} style={style}>
      <div className={styles.inner}>
        <div className={`${styles.face} ${styles.front}`}>
          <span className={styles.price}>{listPrice}</span>
          <span className={styles.label}>List price</span>
        </div>
        <div className={`${styles.face} ${styles.back}`}>
          <span className={styles.price}>{salePrice}</span>
          <span className={styles.label}>{saleLabel}</span>
        </div>
      </div>
    </div>
  );
}