09チームフッター — メンバーごとの時差を計算して今の時刻を示す列

<main class="stage">
<section class="foot" id="foot">
  <p class="foot__hint" id="footHint">固定の基準時刻に仮想の経過時間を加え、メンバーごとに異なるタイムゾーンの現地時刻を計算します。</p>
  <div class="foot__row" id="footRow" role="list" aria-label="チームメンバーの現地時刻"></div>
  <p class="foot__meta"><span class="foot__chip" id="footChip">基準 2026-01-01 09:00 UTC</span></p>
</section>
</main>

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

$duration: $dur-base;         // 300ms — 조용 상태 전환
$easing: $ease-out;
$color: $subject-blue-deep;

@include stage($stage-ink);

.foot {
  width: 100%;
  max-width: 420px;
  display: flex;
  flex-direction: column;
  gap: $sp-3;
  align-items: center;
  text-align: center;
}

.foot__hint {
  margin: 0;
  padding: 0 $sp-2;
  font-weight: 400;
  font-size: 11px;
  line-height: 1.4;
  color: rgba($subject-cream, .72);
}

.foot__row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: $sp-2;
  width: 100%;
}

.foot__cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: $sp-1;
  padding: $sp-2;
  border-radius: $r-control;
  background: rgba($subject-cream, .08);
  transition: background $duration $easing;
}

.foot__cell.is-quiet {
  background: rgba($subject-cream, .03);
}

.foot__tag {
  font-weight: 500;
  font-size: 9px;
  color: rgba($subject-cream, .72);
}

.foot__time {
  font-weight: 700;
  font-size: 14px;
  color: $subject-cream;
  font-variant-numeric: tabular-nums;
}

.foot__dot {
  display: block;
  width: 6px;
  height: 6px;
  border-radius: $r-pill;
  background: $color;
  opacity: 0;
  transition: opacity $duration $easing;
}

.foot__cell.is-quiet .foot__dot {
  opacity: 1;
  background: rgba($subject-cream, .45);
}

.foot__meta { margin: 0; }

.foot__chip {
  display: inline-flex;
  padding: $sp-1 $sp-3;
  border-radius: $r-pill;
  background: $color;
  color: $subject-cream;
  font-weight: 700;
  font-size: 11px;
}

@media (max-width: 340px) {
  .foot { max-width: 300px; gap: $sp-2; }
  .foot__hint { font-size: 9px; }
  .foot__row { gap: $sp-1; }
  .foot__time { font-size: 12px; }
  .foot__chip { font-size: 10px; padding: $sp-1 $sp-2; }
}

@media (prefers-reduced-motion: reduce) {
  .foot__cell,
  .foot__dot {
    transition: none;
  }
}

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);
}

.foot {
  width: 100%;
  max-width: 420px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  text-align: center;
}

.foot__hint {
  margin: 0;
  padding: 0 8px;
  font-weight: 400;
  font-size: 11px;
  line-height: 1.4;
  color: rgba(255, 247, 230, 0.72);
}

.foot__row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  width: 100%;
}

.foot__cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 8px;
  border-radius: 12px;
  background: rgba(255, 247, 230, 0.08);
  transition: background 300ms ease-out;
}

.foot__cell.is-quiet {
  background: rgba(255, 247, 230, 0.03);
}

.foot__tag {
  font-weight: 500;
  font-size: 9px;
  color: rgba(255, 247, 230, 0.72);
}

.foot__time {
  font-weight: 700;
  font-size: 14px;
  color: #fff7e6;
  font-variant-numeric: tabular-nums;
}

.foot__dot {
  display: block;
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: #0a4fe8;
  opacity: 0;
  transition: opacity 300ms ease-out;
}

.foot__cell.is-quiet .foot__dot {
  opacity: 1;
  background: rgba(255, 247, 230, 0.45);
}

.foot__meta {
  margin: 0;
}

.foot__chip {
  display: inline-flex;
  padding: 4px 12px;
  border-radius: 999px;
  background: #0a4fe8;
  color: #fff7e6;
  font-weight: 700;
  font-size: 11px;
}

@media (max-width: 340px) {
  .foot {
    max-width: 300px;
    gap: 8px;
  }
  .foot__hint {
    font-size: 9px;
  }
  .foot__row {
    gap: 4px;
  }
  .foot__time {
    font-size: 12px;
  }
  .foot__chip {
    font-size: 10px;
    padding: 4px 8px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .foot__cell,
  .foot__dot {
    transition: none;
  }
}

// チームメンバーの現地時刻 푸터(09) — 고정 기준시각(EPOCH)에 가상의 경과시간을 더한 시각 하나를
// Intl.DateTimeFormat 으로 팀원마다 다른 timeZone 에 맞춰 다시 읽는다(계산 한 겹).
// 그 시각의 시(hour) 가 야간대(22~6시)에 들면 조용 표시를 켠다. 실제 Date.now() 는
// 캡처 재현성을 위해 쓰지 않는다.
(function () {
  var row = document.getElementById('footRow');
  var chip = document.getElementById('footChip');
  if (!row || !chip) return;
  var reduce = window.matchMedia('(prefers-reduced-motion: reduce)').matches;

  var EPOCH = new Date('2026-01-01T09:00:00Z').getTime();   // 고정 기준시각
  var STEP_MIN = 95;   // 가상 経過 — 매 tick 마다 이만큼 시계를 돌린다

  var MEMBERS = [
    { tag: 'M1', zone: 'Asia/Seoul' },
    { tag: 'M2', zone: 'Europe/London' },
    { tag: 'M3', zone: 'America/New_York' },
    { tag: 'M4', zone: 'Australia/Sydney' }
  ];

  MEMBERS.forEach(function (m) {
    var cell = document.createElement('div');
    cell.className = 'foot__cell';
    cell.setAttribute('role', 'listitem');
    var tag = document.createElement('span');
    tag.className = 'foot__tag';
    tag.textContent = m.tag;
    var time = document.createElement('time');
    time.className = 'foot__time';
    var dot = document.createElement('span');
    dot.className = 'foot__dot';
    dot.setAttribute('aria-hidden', 'true');
    cell.appendChild(tag);
    cell.appendChild(time);
    cell.appendChild(dot);
    row.appendChild(cell);
    m.cell = cell;
    m.timeEl = time;
  });

  function hourIn(zone, date) {
    var s = new Intl.DateTimeFormat('en-GB', { timeZone: zone, hour: 'numeric', hourCycle: 'h23' }).format(date);
    return parseInt(s, 10);
  }

  var elapsedMin = 0;

  function render() {
    var now = new Date(EPOCH + elapsedMin * 60000);
    MEMBERS.forEach(function (m) {
      var label = new Intl.DateTimeFormat('en-GB', { timeZone: m.zone, hour: '2-digit', minute: '2-digit', hourCycle: 'h23' }).format(now);
      m.timeEl.textContent = label;
      m.timeEl.setAttribute('datetime', now.toISOString());
      var hour = hourIn(m.zone, now);
      var quiet = hour < 7 || hour >= 22;
      m.cell.classList.toggle('is-quiet', quiet);
    });
    chip.textContent = '経過 ' + elapsedMin + '分';
  }

  render();

  if (!reduce) {
    setInterval(function () {
      elapsedMin += STEP_MIN;
      render();
    }, 550);
  }
})();

// TeamFooter — vanilla 판(run/338/demo/09-team-footer/index.html) 의 React 포트.
// 고정 기준시각에 가상의 경과 시간을 더해 팀원마다 다른 시간대의 현지시각을
// 계산한다(계산 한 겹).
import { useEffect, useRef } from "react";
import styles from "./TeamFooter.module.scss";

export type TeamFooterProps = {
  duration?: string;
  easing?: string;
  color?: string;
};

const HINT = "고정 기준시각에 가상의 경과 시간을 더해 팀원마다 다른 시간대의 현지시각을 계산합니다";
const ROW_LABEL = "팀원 현지시각";

const EPOCH = new Date("2026-01-01T09:00:00Z").getTime();
const STEP_MIN = 95;

type Member = { tag: string; zone: string };
const MEMBERS: Member[] = [
  { tag: "M1", zone: "Asia/Seoul" },
  { tag: "M2", zone: "Europe/London" },
  { tag: "M3", zone: "America/New_York" },
  { tag: "M4", zone: "Australia/Sydney" }
];

function hourIn(zone: string, date: Date): number {
  const fmt = new Intl.DateTimeFormat("en-GB", { timeZone: zone, hour: "numeric", hourCycle: "h23" });
  return parseInt(fmt.format(date), 10) || 0;
}

export default function TeamFooter({
  duration = "300ms",
  easing = "ease-out",
  color = "#0a4fe8"
}: TeamFooterProps) {
  const rowRef = useRef<HTMLDivElement | null>(null);
  const chipRef = useRef<HTMLSpanElement | null>(null);

  useEffect(() => {
    const row = rowRef.current;
    const chip = chipRef.current;
    if (!row || !chip) return;
    const reduce = window.matchMedia("(prefers-reduced-motion: reduce)").matches;
    const cells = Array.prototype.slice.call(row.querySelectorAll("." + styles.cell)) as HTMLElement[];
    const timeEls = Array.prototype.slice.call(row.querySelectorAll("." + styles.time)) as HTMLElement[];

    let elapsedMin = 0;

    function render(): void {
      const now = new Date(EPOCH + elapsedMin * 60000);
      MEMBERS.forEach((m, i) => {
        const fmt = new Intl.DateTimeFormat("en-GB", {
          timeZone: m.zone,
          hour: "2-digit",
          minute: "2-digit",
          hourCycle: "h23"
        });
        const label = fmt.format(now);
        const timeEl = timeEls[i];
        const cell = cells[i];
        if (!timeEl || !cell) return;
        timeEl.textContent = label;
        timeEl.setAttribute("datetime", now.toISOString());
        const hour = hourIn(m.zone, now);
        const quiet = hour < 7 || hour >= 22;
        cell.classList.toggle(styles.isQuiet, quiet);
      });
      chip!.textContent = "경과 " + elapsedMin + "분";
    }

    render();

    let timer = 0;
    if (!reduce) {
      timer = window.setInterval(() => {
        elapsedMin += STEP_MIN;
        render();
      }, 550);
    }

    return () => {
      if (timer) window.clearInterval(timer);
    };
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, []);

  return (
    <main className={styles.stage}>
      <section className={styles.foot}>
        <p className={styles.hint}>{HINT}</p>
        <div className={styles.row} ref={rowRef} role="list" aria-label={ROW_LABEL}>
          {MEMBERS.map((m) => (
            <div className={styles.cell} role="listitem" key={m.tag}>
              <span className={styles.tag}>{m.tag}</span>
              <time className={styles.time}>09:00</time>
              <span className={styles.dot} aria-hidden="true" />
            </div>
          ))}
        </div>
        <p className={styles.meta}>
          <span className={styles.chip} ref={chipRef} style={{ color }}>경과 0분</span>
        </p>
      </section>
    </main>
  );
}