08Four-face cube

<main class="stage">
  <div class="cb-scene">
    <button type="button" class="cb-cube is-demo" aria-label="Show next face">
      <span class="cb-face cb-face--1">Photo</span>
      <span class="cb-face cb-face--2">Details</span>
      <span class="cb-face cb-face--3">$29</span>
      <span class="cb-face cb-face--4">Buy</span>
    </button>
  </div>
</main>

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

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

@include stage($stage-paper);

$cb-size: 110px;
$cb-half: 55px;

.cb-scene { perspective: 700px; }

.cb-cube {
  --cb-step: 0;
  position: relative;
  width: $cb-size;
  height: $cb-size;
  border: 0;
  padding: 0;
  background: none;
  cursor: pointer;
  transform-style: preserve-3d;
  transform: rotateY(calc(var(--cb-step) * -90deg));
  transition: transform $duration $easing;
}
.cb-cube:focus-visible { outline: 3px solid $subject-ink; outline-offset: $sp-2; }

.cb-face {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: $r-card;
  backface-visibility: hidden;
  font: 700 14px/1 -apple-system, "Segoe UI", sans-serif;
  color: $subject-cream;
}
.cb-face--1 { background: $subject-blue-deep; transform: rotateY(0deg) translateZ(#{$cb-half}); }
.cb-face--2 { background: rgba(23, 20, 26, .82); transform: rotateY(90deg) translateZ(#{$cb-half}); }
.cb-face--3 { background: $subject-blue-deep; transform: rotateY(180deg) translateZ(#{$cb-half}); }
.cb-face--4 { background: rgba(23, 20, 26, .82); transform: rotateY(270deg) translateZ(#{$cb-half}); }

// 데모 루프: 클릭 대신 네 면을 순서대로 자동 회전
@keyframes cb-spin {
  0%, 15%  { transform: rotateY(0); }
  30%, 40% { transform: rotateY(-90deg); }
  55%, 65% { transform: rotateY(-180deg); }
  80%, 90% { transform: rotateY(-270deg); }
  100%     { transform: rotateY(-360deg); }
}
.cb-cube.is-demo { animation: cb-spin ($duration * 5) $easing infinite; }

@media (prefers-reduced-motion: reduce) {
  .cb-cube { animation: none !important; transition: none !important; }
  .cb-cube.is-demo { animation: none !important; }
}

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);
}

.cb-scene {
  perspective: 700px;
}

.cb-cube {
  --cb-step: 0;
  position: relative;
  width: 110px;
  height: 110px;
  border: 0;
  padding: 0;
  background: none;
  cursor: pointer;
  transform-style: preserve-3d;
  transform: rotateY(calc(var(--cb-step) * -90deg));
  transition: transform 600ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.cb-cube:focus-visible {
  outline: 3px solid #17141a;
  outline-offset: 8px;
}

.cb-face {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  backface-visibility: hidden;
  font: 700 14px/1 -apple-system, "Segoe UI", sans-serif;
  color: #fff7e6;
}

.cb-face--1 {
  background: #0a4fe8;
  transform: rotateY(0deg) translateZ(55px);
}

.cb-face--2 {
  background: rgba(23, 20, 26, 0.82);
  transform: rotateY(90deg) translateZ(55px);
}

.cb-face--3 {
  background: #0a4fe8;
  transform: rotateY(180deg) translateZ(55px);
}

.cb-face--4 {
  background: rgba(23, 20, 26, 0.82);
  transform: rotateY(270deg) translateZ(55px);
}

@keyframes cb-spin {
  0%, 15% {
    transform: rotateY(0);
  }
  30%, 40% {
    transform: rotateY(-90deg);
  }
  55%, 65% {
    transform: rotateY(-180deg);
  }
  80%, 90% {
    transform: rotateY(-270deg);
  }
  100% {
    transform: rotateY(-360deg);
  }
}
.cb-cube.is-demo {
  animation: cb-spin 3000ms cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

@media (prefers-reduced-motion: reduce) {
  .cb-cube {
    animation: none !important;
    transition: none !important;
  }
  .cb-cube.is-demo {
    animation: none !important;
  }
}

var cube = document.querySelector(".cb-cube");
  var step = 0;
  cube.addEventListener("click", function () {
    step = (step + 1) % 4;
    cube.style.setProperty("--cb-step", String(step));
  });

import { CSSProperties, useState } from "react";
import styles from "./CubeFourFaces.module.scss";

export interface CubeFourFacesProps {
  duration?: string;
  easing?: string;
  faces?: [string, string, string, string];
}

export default function CubeFourFaces({
  duration = "600ms",
  easing = "cubic-bezier(.2, .8, .2, 1)",
  faces = ["Photo", "Details", "$29", "Buy"],
}: CubeFourFacesProps) {
  const [step, setStep] = useState(0);
  const style = { "--duration": duration, "--easing": easing, "--step": step } as CSSProperties;
  return (
    <div className={styles.scene}>
      <button
        type="button"
        className={styles.cube}
        style={style}
        aria-label="Show next face"
        onClick={() => setStep((s) => s + 1)}
      >
        {faces.map((f, i) => (
          <span key={f} className={`${styles.face} ${styles["face" + i]}`}>{f}</span>
        ))}
      </button>
    </div>
  );
}