07Arrival chip whose date slides over when you change the shipping speed

<main class="stage">
  <section class="sp is-demo" id="sp" aria-label="Choose a shipping speed">
    <header class="sp__head">
      <span class="sp__ic" aria-hidden="true"><svg viewBox="0 0 256 256" fill="currentColor"><path d="M248,120v64a8,8,0,0,1-8,8H216a24,24,0,0,0-48,0H104a24,24,0,0,0-48,0H32a8,8,0,0,1-8-8V144H184V120Z" opacity="0.2"/><path d="M255.42,117l-14-35A15.93,15.93,0,0,0,226.58,72H192V64a8,8,0,0,0-8-8H32A16,16,0,0,0,16,72V184a16,16,0,0,0,16,16H49a32,32,0,0,0,62,0h50a32,32,0,0,0,62,0h17a16,16,0,0,0,16-16V120A7.94,7.94,0,0,0,255.42,117ZM192,88h34.58l9.6,24H192ZM32,72H176v64H32ZM80,208a16,16,0,1,1,16-16A16,16,0,0,1,80,208Zm81-24H111a32,32,0,0,0-62,0H32V152H176v12.31A32.11,32.11,0,0,0,161,184Zm31,24a16,16,0,1,1,16-16A16,16,0,0,1,192,208Zm48-24H223a32.06,32.06,0,0,0-31-24V128h48Z"/></svg></span>
      <h2 class="sp__title">Shipping speed</h2>
    </header>

    <div class="sp__opts">
      <span class="sp__thumb" id="sp-thumb" aria-hidden="true"></span>
      <label class="sp__opt"><input class="sp__radio" type="radio" name="speed" value="0" checked><span class="sp__pill">Standard</span></label>
      <label class="sp__opt"><input class="sp__radio" type="radio" name="speed" value="1"><span class="sp__pill">Express</span></label>
      <label class="sp__opt"><input class="sp__radio" type="radio" name="speed" value="2"><span class="sp__pill">Dawn</span></label>
    </div>

    <p class="sp__line sp__eta">
      <span class="sp__ic sp__ic--sm" aria-hidden="true"><svg viewBox="0 0 256 256" fill="currentColor"><path d="M224,128a96,96,0,1,1-96-96A96,96,0,0,1,224,128Z" opacity="0.2"/><path d="M128,24A104,104,0,1,0,232,128,104.11,104.11,0,0,0,128,24Zm0,192a88,88,0,1,1,88-88A88.1,88.1,0,0,1,128,216Zm64-88a8,8,0,0,1-8,8H128a8,8,0,0,1-8-8V72a8,8,0,0,1,16,0v48h48A8,8,0,0,1,192,128Z"/></svg></span>
      <span class="sp__label">Arrives</span>
      <span class="sp__win" aria-hidden="true"><span class="sp__roll">
        <span class="sp__cell">Thu, Sep 17</span>
        <span class="sp__cell">Mon, Sep 14</span>
        <span class="sp__cell">Sun, Sep 13</span>
      </span></span>
    </p>

    <p class="sp__line sp__line--fee">
      <span class="sp__label">Shipping</span>
      <span class="sp__win sp__win--fee" aria-hidden="true"><span class="sp__roll">
        <span class="sp__cell sp__cell--fee">3,000 KRW</span>
        <span class="sp__cell sp__cell--fee">5,000 KRW</span>
        <span class="sp__cell sp__cell--fee">7,000 KRW</span>
      </span></span>
    </p>

    <p class="sp__live" id="sp-live" aria-live="polite"></p>
  </section>
</main>

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

// 배송 방법을 고르면 도착 예정 날짜가 오도미터처럼 한 칸 밀려 바뀐다.
// 창(overflow: hidden)은 한 줄 높이만 열어 두고, 그 안의 줄판을 translateY 로 올린다.
$duration: $dur-loop;
$easing: $ease-spring;
$color: $subject-ink;

@include stage($stage-yellow);

.sp {
  position: relative;
  box-sizing: border-box;
  width: min(300px, 92vw);
  padding: $sp-3;
  border-radius: $r-card;
  background: $subject-cream;
  color: $color;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
}
.sp * { box-sizing: border-box; }

.sp__head {
  display: flex;
  align-items: center;
  gap: $sp-2;
  margin: 0 0 $sp-3;
}
.sp__ic {
  display: inline-grid;
  place-items: center;
  width: 20px;
  height: 20px;
  color: $color;
}
.sp__ic--sm { width: 14px; height: 14px; }
.sp__ic svg { width: 100%; height: 100%; }
.sp__title {
  margin: 0;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.3;
}

// ── 배송 방법 세 칸: 균등 3열 격자 위를 같은 폭의 알약이 옮겨 다닌다 ──
// 칸 폭을 격자가 정하므로 알약은 translateX(100%) 한 번이 정확히 한 칸이다 (짐작한 px 이 아니다)
.sp__opts {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  padding: 0;
  border-radius: $r-pill;
  background: rgba(23, 20, 26, .08);
}
.sp__thumb {
  position: absolute;
  top: 0;
  left: 0;
  width: calc(100% / 3);
  height: 100%;
  border: 2px solid $color;
  border-radius: $r-pill;
  background: $subject-cream;
  transform: translateX(calc(var(--i, 0) * 100%));
  transition: transform $dur-base $easing;
}
.sp__opt {
  position: relative;
  z-index: 1;
  display: block;
  cursor: pointer;
}
.sp__radio {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  opacity: 0;
}
.sp__pill {
  display: block;
  padding: $sp-1 0;
  border-radius: $r-pill;
  text-align: center;
  font-size: 11px;
  font-weight: 700;
  line-height: 1.4;
}
.sp__radio:focus-visible ~ .sp__pill {
  outline: 2px solid $color;
  outline-offset: 2px;
}

// ── 도착 예정 · 배송비 줄 ──
.sp__line {
  display: flex;
  align-items: center;
  gap: $sp-2;
  margin: $sp-3 0 0;
}
// 도착 예정 줄은 칩이다 — 빠른 배송일수록 바탕이 진해져, 날짜가 자리를 잡은 순간이
// 한 프레임 안에서 가장 크게 달라진다(= 대표 이미지가 밀리는 중간이 아니라 멎은 장면이 된다)
.sp__eta {
  padding: $sp-1 $sp-2;
  border-radius: $r-control;
  background-color: rgba(23, 20, 26, .06);
  transition: background-color $dur-quick steps(1, end);
}
.sp:has(.sp__opt:nth-child(3) .sp__radio:checked) .sp__eta { background-color: rgba(47, 109, 246, .14); }
.sp:has(.sp__opt:nth-child(4) .sp__radio:checked) .sp__eta { background-color: rgba(47, 109, 246, .24); }
.sp__line--fee { margin-top: $sp-2; }
.sp__label {
  font-size: 11px;
  font-weight: 700;
  line-height: 1.4;
  color: rgba(23, 20, 26, .62);
}
// 창은 한 줄만 보여 준다 — 줄판이 위로 밀려 나가고 다음 줄이 아래에서 올라온다
.sp__win {
  margin-left: auto;
  height: 16px;
  overflow: hidden;
}
.sp__roll {
  display: block;
  transform: translateY(calc(var(--i, 0) * -33.3333%));
  transition: transform $dur-base $easing;
}
.sp__cell {
  display: block;
  height: 16px;
  font-size: 13px;
  font-weight: 700;
  line-height: 16px;
  text-align: right;
  white-space: nowrap;
}
.sp__cell--fee {
  font-size: 12px;
  color: rgba(23, 20, 26, .72);
}

// 화면에는 안 보이되 자리는 지운다 — 바뀐 결과를 읽어 주는 칸
.sp__live {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

// ── 격자 미리보기 루프: 2초 안에 일반 → 빠른 → 새벽 → 일반 ──
// 되돌아오는 구간은 88% 에 끝난다 (24프레임의 마지막 장이 95.8% 라 그 뒤는 안 찍힌다)
@keyframes spRoll {
  0%, 20% { transform: translateY(0); }
  32%, 48% { transform: translateY(-33.3333%); }
  60%, 76% { transform: translateY(-66.6666%); }
  88%, 100% { transform: translateY(0); }
}
@keyframes spThumb {
  0%, 20% { transform: translateX(0); }
  32%, 48% { transform: translateX(100%); }
  60%, 76% { transform: translateX(200%); }
  88%, 100% { transform: translateX(0); }
}
// 칩 바탕은 날짜가 멎는 32% · 60% · 88% 에 정확히 한 프레임으로 갈린다 (steps 라 중간색이 없다)
@keyframes spTint {
  0%, 20% { background-color: rgba(23, 20, 26, .06); }
  32%, 48% { background-color: rgba(47, 109, 246, .14); }
  60%, 76% { background-color: rgba(47, 109, 246, .24); }
  88%, 100% { background-color: rgba(23, 20, 26, .06); }
}
.sp.is-demo {
  .sp__eta {
    animation-name: spTint;
    animation-duration: $duration;
    animation-timing-function: steps(1, end);
    animation-iteration-count: infinite;
  }
  .sp__roll {
    animation-name: spRoll;
    animation-duration: $duration;
    animation-timing-function: $easing;
    animation-iteration-count: infinite;
  }
  .sp__thumb {
    animation-name: spThumb;
    animation-duration: $duration;
    animation-timing-function: $easing;
    animation-iteration-count: infinite;
  }
}

@media (max-width: 340px) {
  .sp { padding: $sp-2; }
  .sp__head { margin-bottom: $sp-2; }
  .sp__line { margin-top: $sp-2; }
  .sp__title { font-size: 12px; }
  .sp__cell { font-size: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  .sp__roll,
  .sp__thumb,
  .sp__eta { transition: none !important; }
  .sp.is-demo .sp__roll,
  .sp.is-demo .sp__thumb,
  .sp.is-demo .sp__eta { 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: #ffd23f;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.sp {
  position: relative;
  box-sizing: border-box;
  width: min(300px, 92vw);
  padding: 12px;
  border-radius: 16px;
  background: #fff7e6;
  color: #17141a;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
}

.sp * {
  box-sizing: border-box;
}

.sp__head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 12px;
}

.sp__ic {
  display: inline-grid;
  place-items: center;
  width: 20px;
  height: 20px;
  color: #17141a;
}

.sp__ic--sm {
  width: 14px;
  height: 14px;
}

.sp__ic svg {
  width: 100%;
  height: 100%;
}

.sp__title {
  margin: 0;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.3;
}

.sp__opts {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  padding: 0;
  border-radius: 999px;
  background: rgba(23, 20, 26, 0.08);
}

.sp__thumb {
  position: absolute;
  top: 0;
  left: 0;
  width: 33.3333333333%;
  height: 100%;
  border: 2px solid #17141a;
  border-radius: 999px;
  background: #fff7e6;
  transform: translateX(calc(var(--i, 0) * 100%));
  transition: transform 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.sp__opt {
  position: relative;
  z-index: 1;
  display: block;
  cursor: pointer;
}

.sp__radio {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  opacity: 0;
}

.sp__pill {
  display: block;
  padding: 4px 0;
  border-radius: 999px;
  text-align: center;
  font-size: 11px;
  font-weight: 700;
  line-height: 1.4;
}

.sp__radio:focus-visible ~ .sp__pill {
  outline: 2px solid #17141a;
  outline-offset: 2px;
}

.sp__line {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 12px 0 0;
}

.sp__eta {
  padding: 4px 8px;
  border-radius: 12px;
  background-color: rgba(23, 20, 26, 0.06);
  transition: background-color 220ms steps(1, end);
}

.sp:has(.sp__opt:nth-child(3) .sp__radio:checked) .sp__eta {
  background-color: rgba(47, 109, 246, 0.14);
}

.sp:has(.sp__opt:nth-child(4) .sp__radio:checked) .sp__eta {
  background-color: rgba(47, 109, 246, 0.24);
}

.sp__line--fee {
  margin-top: 8px;
}

.sp__label {
  font-size: 11px;
  font-weight: 700;
  line-height: 1.4;
  color: rgba(23, 20, 26, 0.62);
}

.sp__win {
  margin-left: auto;
  height: 16px;
  overflow: hidden;
}

.sp__roll {
  display: block;
  transform: translateY(calc(var(--i, 0) * -33.3333%));
  transition: transform 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.sp__cell {
  display: block;
  height: 16px;
  font-size: 13px;
  font-weight: 700;
  line-height: 16px;
  text-align: right;
  white-space: nowrap;
}

.sp__cell--fee {
  font-size: 12px;
  color: rgba(23, 20, 26, 0.72);
}

.sp__live {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

@keyframes spRoll {
  0%, 20% {
    transform: translateY(0);
  }
  32%, 48% {
    transform: translateY(-33.3333%);
  }
  60%, 76% {
    transform: translateY(-66.6666%);
  }
  88%, 100% {
    transform: translateY(0);
  }
}
@keyframes spThumb {
  0%, 20% {
    transform: translateX(0);
  }
  32%, 48% {
    transform: translateX(100%);
  }
  60%, 76% {
    transform: translateX(200%);
  }
  88%, 100% {
    transform: translateX(0);
  }
}
@keyframes spTint {
  0%, 20% {
    background-color: rgba(23, 20, 26, 0.06);
  }
  32%, 48% {
    background-color: rgba(47, 109, 246, 0.14);
  }
  60%, 76% {
    background-color: rgba(47, 109, 246, 0.24);
  }
  88%, 100% {
    background-color: rgba(23, 20, 26, 0.06);
  }
}
.sp.is-demo .sp__eta {
  animation-name: spTint;
  animation-duration: 2s;
  animation-timing-function: steps(1, end);
  animation-iteration-count: infinite;
}
.sp.is-demo .sp__roll {
  animation-name: spRoll;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-iteration-count: infinite;
}
.sp.is-demo .sp__thumb {
  animation-name: spThumb;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-iteration-count: infinite;
}

@media (max-width: 340px) {
  .sp {
    padding: 8px;
  }
  .sp__head {
    margin-bottom: 8px;
  }
  .sp__line {
    margin-top: 8px;
  }
  .sp__title {
    font-size: 12px;
  }
  .sp__cell {
    font-size: 12px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .sp__roll,
  .sp__thumb,
  .sp__eta {
    transition: none !important;
  }
  .sp.is-demo .sp__roll,
  .sp.is-demo .sp__thumb,
  .sp.is-demo .sp__eta {
    animation: none !important;
  }
}

// 배송 방법을 고르면 --i 하나가 바뀌고, 도착 칩과 Shipping 칸이 같은 값으로 밀려 올라간다.
// 칸 안의 글자는 aria-hidden 이라 읽히지 않는다 — 바뀐 결과는 aria-live 칸이 한 문장으로 읽어 준다.
var sp = document.getElementById('sp');
var live = document.getElementById('sp-live');
var summary = [
  'Arrives Thu, Sep 17 · shipping 3,000 KRW',
  'Arrives Mon, Sep 14 · shipping 5,000 KRW',
  'Arrives Sun, Sep 13 · shipping 7,000 KRW'
];
function pick(index) {
  sp.classList.remove('is-demo');
  sp.style.setProperty('--i', index);
  live.textContent = summary[index];
}
var radios = sp.querySelectorAll('.sp__radio');
for (var n = 0; n < radios.length; n++) {
  radios[n].addEventListener('change', function (event) {
    pick(Number(event.target.value));
  });
}

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

export type ShipSpeedEtaSwapProps = {
  title?: string;
  /** 배송 방법 이름 — 도착 예정일·배송비와 같은 순서 */
  speeds?: string[];
  dates?: string[];
  fees?: string[];
  /** 고른 결과를 한 문장으로 읽어 주는 문구 (aria-live) */
  summaries?: string[];
  etaLabel?: string;
  feeLabel?: string;
  groupLabel?: string;
  /** 격자 미리보기용 2초 자동 루프. 사람이 손대면 꺼진다 */
  demo?: boolean;
  duration?: number;
  easing?: string;
  color?: string;
};

type Vars = CSSProperties & {
  "--duration"?: string;
  "--easing"?: string;
  "--color"?: string;
  "--i"?: number;
};
// ambient 가 얇아 DOM 이벤트 타입을 못 쓴다 — 필요한 꼴만 로컬 타입으로 선언
type ChangeEvt = { target: { value: string } };

function TruckIcon() {
  return (
    <svg viewBox="0 0 256 256" width="1em" height="1em" fill="currentColor" aria-hidden="true"><path d="M248,120v64a8,8,0,0,1-8,8H216a24,24,0,0,0-48,0H104a24,24,0,0,0-48,0H32a8,8,0,0,1-8-8V144H184V120Z" opacity="0.2"/><path d="M255.42,117l-14-35A15.93,15.93,0,0,0,226.58,72H192V64a8,8,0,0,0-8-8H32A16,16,0,0,0,16,72V184a16,16,0,0,0,16,16H49a32,32,0,0,0,62,0h50a32,32,0,0,0,62,0h17a16,16,0,0,0,16-16V120A7.94,7.94,0,0,0,255.42,117ZM192,88h34.58l9.6,24H192ZM32,72H176v64H32ZM80,208a16,16,0,1,1,16-16A16,16,0,0,1,80,208Zm81-24H111a32,32,0,0,0-62,0H32V152H176v12.31A32.11,32.11,0,0,0,161,184Zm31,24a16,16,0,1,1,16-16A16,16,0,0,1,192,208Zm48-24H223a32.06,32.06,0,0,0-31-24V128h48Z"/></svg>
  );
}

function ClockIcon() {
  return (
    <svg viewBox="0 0 256 256" width="1em" height="1em" fill="currentColor" aria-hidden="true"><path d="M224,128a96,96,0,1,1-96-96A96,96,0,0,1,224,128Z" opacity="0.2"/><path d="M128,24A104,104,0,1,0,232,128,104.11,104.11,0,0,0,128,24Zm0,192a88,88,0,1,1,88-88A88.1,88.1,0,0,1,128,216Zm64-88a8,8,0,0,1-8,8H128a8,8,0,0,1-8-8V72a8,8,0,0,1,16,0v48h48A8,8,0,0,1,192,128Z"/></svg>
  );
}

export default function ShipSpeedEtaSwap({
  title = "배송 방법",
  speeds = ["일반", "빠른", "새벽"],
  dates = ["9월 17일 (목)", "9월 14일 (월)", "9월 13일 (일)"],
  fees = ["3,000원", "5,000원", "7,000원"],
  summaries = [
    "9월 17일 (목) 도착 · 배송비 3,000원",
    "9월 14일 (월) 도착 · 배송비 5,000원",
    "9월 13일 (일) 도착 · 배송비 7,000원",
  ],
  etaLabel = "도착 예정",
  feeLabel = "배송비",
  groupLabel = "배송 방법 고르기",
  demo = true,
  duration = 2000,
  easing = "cubic-bezier(.2,.8,.2,1)",
  color = "#17141a",
}: ShipSpeedEtaSwapProps) {
  const [index, setIndex] = useState(0);
  const [live, setLive] = useState(demo);

  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color, "--i": index };
  const cls = [styles.sp, live ? styles.isDemo : ""].filter(Boolean).join(" ");
  // 빠를수록 도착 칩 바탕이 진해진다 — 날짜가 자리를 잡은 순간이 한눈에 보이게
  const tint = index === 1 ? styles.tint1 : index === 2 ? styles.tint2 : "";

  function pick(event: ChangeEvt) {
    setLive(false);
    setIndex(Number(event.target.value));
  }

  return (
    <section className={cls} style={vars} aria-label={groupLabel}>
      <header className={styles.head}>
        <span className={styles.ic} aria-hidden="true"><TruckIcon /></span>
        <h2 className={styles.title}>{title}</h2>
      </header>

      <div className={styles.opts}>
        <span className={styles.thumb} aria-hidden="true" />
        {speeds.map((name, n) => (
          <label className={styles.opt} key={name}>
            <input
              className={styles.radio}
              type="radio"
              name="speed"
              value={String(n)}
              checked={index === n}
              onChange={pick}
            />
            <span className={styles.pill}>{name}</span>
          </label>
        ))}
      </div>

      <p className={`${styles.line} ${styles.eta} ${tint}`}>
        <span className={`${styles.ic} ${styles.icSm}`} aria-hidden="true"><ClockIcon /></span>
        <span className={styles.label}>{etaLabel}</span>
        <span className={styles.win} aria-hidden="true">
          <span className={styles.roll}>
            {dates.map((date) => <span className={styles.cell} key={date}>{date}</span>)}
          </span>
        </span>
      </p>

      <p className={`${styles.line} ${styles.lineFee}`}>
        <span className={styles.label}>{feeLabel}</span>
        <span className={styles.win} aria-hidden="true">
          <span className={styles.roll}>
            {fees.map((fee) => <span className={`${styles.cell} ${styles.cellFee}`} key={fee}>{fee}</span>)}
          </span>
        </span>
      </p>

      <p className={styles.srOnly} aria-live="polite">{live ? "" : summaries[index]}</p>
    </section>
  );
}