03Grid↔list view switch

<main class="stage">
  <section class="vs is-demo" aria-label="The same three cards move between grid and list layouts">
    <input class="vs__radio" type="radio" name="vs-218" id="vs-grid" checked>
    <input class="vs__radio" type="radio" name="vs-218" id="vs-list">
    <div class="vs__toggle" aria-hidden="true"><span class="vs__knob"></span></div>
    <div class="vs__toggle-labels">
      <label class="vs__label" for="vs-grid">Grid</label>
      <label class="vs__label" for="vs-list">List</label>
    </div>
    <div class="vs__board">
      <article class="vs__card vs__card--1"><span class="vs__thumb" aria-hidden="true"></span><span class="vs__name">Summer knit</span></article>
      <article class="vs__card vs__card--2"><span class="vs__thumb" aria-hidden="true"></span><span class="vs__name">Linen shirt</span></article>
      <article class="vs__card vs__card--3"><span class="vs__thumb" aria-hidden="true"></span><span class="vs__name">Straw hat</span></article>
    </div>
  </section>
</main>

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

$duration: $dur-base;                             // 카드가 배치를 바꾸는 시간
$easing: $ease-spring;
$color: $subject-blue;                            // 썸네일 색

@include stage($stage-orange);

.vs { width: 280px; max-width: 92vw; }
.vs__radio { position: absolute; opacity: 0; pointer-events: none; }

// ── 토글: 라디오 + 미끄러지는 손잡이 (JS 0줄) — 시각 요소는 형제로
.vs__toggle {
  position: relative;
  width: 168px;
  height: 28px;
  margin: 0 auto;
  padding: 4px;
  box-sizing: border-box;
  border-radius: $r-pill;
  background: rgba(23, 20, 26, .18);
}
.vs__knob {
  position: absolute; top: 4px; bottom: 4px; left: 4px;
  width: calc(50% - 4px);
  box-sizing: border-box;
  border-radius: $r-pill;
  background: $stage-paper;
  box-shadow: $shadow-press;
  transform: translateX(0);
  transition: transform $duration $easing;
}
#vs-list:checked ~ .vs__toggle .vs__knob { transform: translateX(100%); }

.vs__toggle-labels {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  width: 168px;
  margin: -28px auto $sp-3;                       // 글자를 토글 위에 얹는다
}
.vs__label {
  padding: $sp-1 0;
  font-weight: 700;
  font-size: 12px;
  font-family: inherit;
  color: $stage-paper;
  text-align: center;
  cursor: pointer;
  transition: color $dur-quick $easing;
}
#vs-grid:checked ~ .vs__toggle-labels .vs__label[for="vs-grid"],
#vs-list:checked ~ .vs__toggle-labels .vs__label[for="vs-list"] { color: $stage-ink; }

// ── 보드: 같은 카드 3장 (크기 고정), 배치만 transform 좌표로 바뀐다
.vs__board { position: relative; height: 200px; }
.vs__card {
  position: absolute; left: 0; top: 0;
  display: flex; align-items: center; gap: $sp-2;
  box-sizing: border-box;
  width: 136px;
  height: 60px;
  padding: $sp-2;
  border-radius: $r-card;
  background: $stage-paper;
  box-shadow: $shadow-press;
  transition: transform $duration $easing;
}
.vs__thumb {
  flex: 0 0 auto;
  width: 36px; height: 36px;
  border-radius: $r-sm;
  background: linear-gradient(150deg, $color, $stage-yellow);
}
.vs__name {
  font-weight: 700;
  font-size: 12px;
  line-height: 1.2;
  font-family: inherit;
  color: $stage-ink;
}

// 격자 배치: 2열 — % 는 카드 자기 크기 기준이라 카드가 줄면 간격도 줄어든다
.vs__card--1 { transform: translate(0, 0); }
.vs__card--2 { transform: translate(calc(100% + 8px), 0); }
.vs__card--3 { transform: translate(0, calc(100% + 10px)); }
// 목록 배치: 한 줄씩 아래로
#vs-list:checked ~ .vs__board .vs__card--1 { transform: translate(0, 0); }
#vs-list:checked ~ .vs__board .vs__card--2 { transform: translate(0, calc(100% + 10px)); }
#vs-list:checked ~ .vs__board .vs__card--3 { transform: translate(0, calc(200% + 20px)); }

// 렌더·갤러리용 자동 루프: 격자→목록→격자를 2초 주기로
.vs.is-demo .vs__knob     { animation: knob-loop $dur-loop $easing infinite; }
.vs.is-demo .vs__label[for="vs-grid"] { animation: lab-grid $dur-loop $easing infinite; }
.vs.is-demo .vs__label[for="vs-list"] { animation: lab-list $dur-loop $easing infinite; }
.vs.is-demo .vs__card--2  { animation: c2-loop $dur-loop $easing infinite; }
.vs.is-demo .vs__card--3  { animation: c3-loop $dur-loop $easing infinite; }

@keyframes knob-loop {
  0%, 20%, 100% { transform: translateX(0); }
  45%, 65%      { transform: translateX(100%); }
}
@keyframes lab-grid {                    // 손잡이가 떠나자마자 색이 따라간다
  0%, 24%      { color: $stage-ink; }
  32%, 68%     { color: $stage-paper; }
  78%, 100%    { color: $stage-ink; }
}
@keyframes lab-list {
  0%, 24%      { color: $stage-paper; }
  32%, 68%     { color: $stage-ink; }
  78%, 100%    { color: $stage-paper; }
}
@keyframes c2-loop {
  0%, 20%, 100% { transform: translate(calc(100% + 8px), 0); }
  45%, 65%      { transform: translate(0, calc(100% + 10px)); }
}
@keyframes c3-loop {
  0%, 20%, 100% { transform: translate(0, calc(100% + 10px)); }
  45%, 65%      { transform: translate(0, calc(200% + 20px)); }
}

@media (max-width: 360px) {          // 320×200 아이프레임 대응
  .vs { width: 232px; }
  .vs__toggle { width: 140px; height: 24px; }
  .vs__toggle-labels { width: 140px; margin: -24px auto 8px; }
  .vs__label { font-size: 11px; padding: 4px 0; }
  .vs__board { height: 140px; }
  .vs__card { width: 112px; height: 40px; padding: 4px; gap: 4px; }
  .vs__thumb { width: 24px; height: 24px; }
  .vs__name { font-size: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  .vs__knob, .vs__card, .vs__label { transition: none; }
  .vs.is-demo .vs__knob,
  .vs.is-demo .vs__card,
  .vs.is-demo .vs__label { animation: none; }     // 즉시 목표 배치로 전환
}

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);
}

.vs {
  width: 280px;
  max-width: 92vw;
}

.vs__radio {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.vs__toggle {
  position: relative;
  width: 168px;
  height: 28px;
  margin: 0 auto;
  padding: 4px;
  box-sizing: border-box;
  border-radius: 999px;
  background: rgba(23, 20, 26, 0.18);
}

.vs__knob {
  position: absolute;
  top: 4px;
  bottom: 4px;
  left: 4px;
  width: calc(50% - 4px);
  box-sizing: border-box;
  border-radius: 999px;
  background: #ffffff;
  box-shadow: 0 6px 12px rgba(23, 20, 26, 0.32);
  transform: translateX(0);
  transition: transform 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

#vs-list:checked ~ .vs__toggle .vs__knob {
  transform: translateX(100%);
}

.vs__toggle-labels {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  width: 168px;
  margin: -28px auto 12px;
}

.vs__label {
  padding: 4px 0;
  font-weight: 700;
  font-size: 12px;
  font-family: inherit;
  color: #ffffff;
  text-align: center;
  cursor: pointer;
  transition: color 220ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

#vs-grid:checked ~ .vs__toggle-labels .vs__label[for=vs-grid],
#vs-list:checked ~ .vs__toggle-labels .vs__label[for=vs-list] {
  color: #17141a;
}

.vs__board {
  position: relative;
  height: 200px;
}

.vs__card {
  position: absolute;
  left: 0;
  top: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  box-sizing: border-box;
  width: 136px;
  height: 60px;
  padding: 8px;
  border-radius: 16px;
  background: #ffffff;
  box-shadow: 0 6px 12px rgba(23, 20, 26, 0.32);
  transition: transform 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.vs__thumb {
  flex: 0 0 auto;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: linear-gradient(150deg, #2f6df6, #ffd23f);
}

.vs__name {
  font-weight: 700;
  font-size: 12px;
  line-height: 1.2;
  font-family: inherit;
  color: #17141a;
}

.vs__card--1 {
  transform: translate(0, 0);
}

.vs__card--2 {
  transform: translate(calc(100% + 8px), 0);
}

.vs__card--3 {
  transform: translate(0, calc(100% + 10px));
}

#vs-list:checked ~ .vs__board .vs__card--1 {
  transform: translate(0, 0);
}

#vs-list:checked ~ .vs__board .vs__card--2 {
  transform: translate(0, calc(100% + 10px));
}

#vs-list:checked ~ .vs__board .vs__card--3 {
  transform: translate(0, calc(200% + 20px));
}

.vs.is-demo .vs__knob {
  animation: knob-loop 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

.vs.is-demo .vs__label[for=vs-grid] {
  animation: lab-grid 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

.vs.is-demo .vs__label[for=vs-list] {
  animation: lab-list 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

.vs.is-demo .vs__card--2 {
  animation: c2-loop 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

.vs.is-demo .vs__card--3 {
  animation: c3-loop 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

@keyframes knob-loop {
  0%, 20%, 100% {
    transform: translateX(0);
  }
  45%, 65% {
    transform: translateX(100%);
  }
}
@keyframes lab-grid {
  0%, 24% {
    color: #17141a;
  }
  32%, 68% {
    color: #ffffff;
  }
  78%, 100% {
    color: #17141a;
  }
}
@keyframes lab-list {
  0%, 24% {
    color: #ffffff;
  }
  32%, 68% {
    color: #17141a;
  }
  78%, 100% {
    color: #ffffff;
  }
}
@keyframes c2-loop {
  0%, 20%, 100% {
    transform: translate(calc(100% + 8px), 0);
  }
  45%, 65% {
    transform: translate(0, calc(100% + 10px));
  }
}
@keyframes c3-loop {
  0%, 20%, 100% {
    transform: translate(0, calc(100% + 10px));
  }
  45%, 65% {
    transform: translate(0, calc(200% + 20px));
  }
}
@media (max-width: 360px) {
  .vs {
    width: 232px;
  }
  .vs__toggle {
    width: 140px;
    height: 24px;
  }
  .vs__toggle-labels {
    width: 140px;
    margin: -24px auto 8px;
  }
  .vs__label {
    font-size: 11px;
    padding: 4px 0;
  }
  .vs__board {
    height: 140px;
  }
  .vs__card {
    width: 112px;
    height: 40px;
    padding: 4px;
    gap: 4px;
  }
  .vs__thumb {
    width: 24px;
    height: 24px;
  }
  .vs__name {
    font-size: 10px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .vs__knob, .vs__card, .vs__label {
    transition: none;
  }
  .vs.is-demo .vs__knob,
  .vs.is-demo .vs__card,
  .vs.is-demo .vs__label {
    animation: none;
  }
}

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

export type ViewSwitchGridListProps = {
  items: string[];
  /** 카드가 배치을 바꾸는 시간 (기본 300ms) */
  duration?: number;
  easing?: string;
  /** 썸네일 그라데이션 색 */
  color?: string;
};

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

export default function ViewSwitchGridList({
  items,
  duration = 300,
  easing = "cubic-bezier(.2,.8,.2,1)",
  color = "#2f6df6",
}: ViewSwitchGridListProps) {
  const [list, setList] = useState(false);
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };
  const layout = list ? "list" : "grid";

  return (
    <section className={styles.vs} style={vars} aria-label="보기 방식 전환">
      <div className={styles.toggle} role="tablist" aria-label="보기 방식">
        <button
          type="button"
          className={`${styles.label} ${layout === "grid" ? styles.labelOn : ""}`}
          role="tab" aria-selected={layout === "grid"}
          onClick={() => setList(false)}
        >
          격자
        </button>
        <button
          type="button"
          className={`${styles.label} ${layout === "list" ? styles.labelOn : ""}`}
          role="tab" aria-selected={layout === "list"}
          onClick={() => setList(true)}
        >
          목록
        </button>
        <span className={styles.knob} aria-hidden="true" data-at={layout} />
      </div>
      <div className={styles.board}>
        {items.map((name, i) => (
          <article key={name} className={styles.card} data-pos={layout === "list" ? `l${i + 1}` : `g${i + 1}`}>
            <span className={styles.thumb} aria-hidden="true" />
            <span className={styles.name}>{name}</span>
          </article>
        ))}
      </div>
    </section>
  );
}