01横に反転

<main class="stage">
  <div class="fy-card is-demo">
    <div class="fy-card__inner">
      <div class="fy-card__face fy-card__face--front">FRONT</div>
      <div class="fy-card__face fy-card__face--back">BACK</div>
    </div>
  </div>
</main>

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

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

@include stage($stage-ink);

.fy-card {
  perspective: 700px;
  width: 170px;
  height: 108px;
}

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

.fy-card__face {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: $r-card;
  backface-visibility: hidden;
  font: 700 15px/1 -apple-system, "Segoe UI", sans-serif;
  letter-spacing: .06em;
  color: $subject-cream;
}
.fy-card__face--front { background: $subject-blue-deep; }
.fy-card__face--back { background: rgba(255, 255, 255, .14); transform: rotateY(180deg); }

// 데모 루프: is-demo 는 같은 회전을 무한 재생 (캡처용) — :hover 실사용 경로와 별개
@keyframes fy-flip {
  0%, 40% { transform: rotateY(0); }
  60%, 100% { transform: rotateY(180deg); }
}
.fy-card.is-demo .fy-card__inner { animation: fy-flip $duration * 2 $easing infinite; }

@media (prefers-reduced-motion: reduce) {
  .fy-card:hover .fy-card__inner,
  .fy-card.is-demo .fy-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: #17141a;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.fy-card {
  perspective: 700px;
  width: 170px;
  height: 108px;
}

.fy-card__inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 600ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

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

.fy-card__face {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  backface-visibility: hidden;
  font: 700 15px/1 -apple-system, "Segoe UI", sans-serif;
  letter-spacing: 0.06em;
  color: #fff7e6;
}

.fy-card__face--front {
  background: #0a4fe8;
}

.fy-card__face--back {
  background: rgba(255, 255, 255, 0.14);
  transform: rotateY(180deg);
}

@keyframes fy-flip {
  0%, 40% {
    transform: rotateY(0);
  }
  60%, 100% {
    transform: rotateY(180deg);
  }
}
.fy-card.is-demo .fy-card__inner {
  animation: fy-flip 1200ms cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

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

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

export interface FlipYHoverProps {
  duration?: string;
  easing?: string;
  front?: string;
  back?: string;
}

export default function FlipYHover({
  duration = "600ms",
  easing = "cubic-bezier(.2, .8, .2, 1)",
  front = "FRONT",
  back = "BACK",
}: FlipYHoverProps) {
  const style = { "--duration": duration, "--easing": easing } as CSSProperties;
  return (
    <div className={styles.card} style={style}>
      <div className={styles.inner}>
        <div className={`${styles.face} ${styles.front}`}>{front}</div>
        <div className={`${styles.face} ${styles.back}`}>{back}</div>
      </div>
    </div>
  );
}