08Apply CTA — a badge that computes days left until deadline on every load

<main class="stage">
<section class="cta" id="cta">
  <p class="cta__hint" id="ctaHint">It rounds up with Math.ceil to calculate the days remaining from a fixed reference date to the deadline, switching to an urgent state at three days or fewer.</p>
  <div class="cta__card">
    <p class="cta__role" id="ctaRole">Frontend Engineer</p>
    <p class="cta__days" id="ctaDays" aria-live="polite">D-12</p>
    <button class="cta__btn" id="ctaBtn" type="button">Apply</button>
  </div>
  <p class="cta__meta"><span class="cta__chip" id="ctaChip">Reference date 2026-01-01</span></p>
</section>
</main>

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

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

@include stage($stage-paper);

.cta {
  width: 100%;
  max-width: 380px;
  display: flex;
  flex-direction: column;
  gap: $sp-2;
  align-items: center;
  text-align: center;
}

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

.cta__card {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: $sp-2;
  align-items: center;
  padding: $sp-4;
  border-radius: $r-card;
  background: rgba($subject-ink, .04);
  transition: background $duration $easing;
}

.cta__card.is-urgent {
  background: $error-soft;
}

.cta__role {
  margin: 0;
  font-weight: 600;
  font-size: 14px;
  color: $subject-ink;
}

.cta__days {
  margin: 0;
  font-weight: 700;
  font-size: 22px;
  color: $color;
  transition: color $duration $easing, transform $duration $ease-pop;
}

.cta__card.is-urgent .cta__days {
  color: $error;
  transform: scale(1.12);
}

.cta__btn {
  appearance: none;
  border: 0;
  padding: $sp-2 $sp-5;
  border-radius: $r-pill;
  background: $color;
  color: $subject-cream;
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
  transition: background $duration $easing;
}

.cta__card.is-urgent .cta__btn {
  background: $error;
}

.cta__meta { margin: 0; }

.cta__chip {
  display: inline-flex;
  padding: $sp-1 $sp-3;
  border-radius: $r-pill;
  background: rgba($subject-ink, .08);
  color: $subject-ink;
  font-weight: 700;
  font-size: 11px;
}

@media (max-width: 340px) {
  .cta { max-width: 280px; gap: $sp-1; }
  .cta__hint { font-size: 9px; }
  .cta__card { padding: $sp-2; gap: $sp-1; }
  .cta__days { font-size: 18px; }
  .cta__btn { padding: $sp-1 $sp-4; font-size: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  .cta__card,
  .cta__days,
  .cta__btn {
    transition: none;
  }
}

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);
}

.cta {
  width: 100%;
  max-width: 380px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
  text-align: center;
}

.cta__hint {
  margin: 0;
  padding: 0 8px;
  font-weight: 400;
  font-size: 11px;
  line-height: 1.4;
  color: rgba(23, 20, 26, 0.72);
}

.cta__card {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
  padding: 16px;
  border-radius: 16px;
  background: rgba(23, 20, 26, 0.04);
  transition: background 300ms ease-out;
}

.cta__card.is-urgent {
  background: #ffe0d8;
}

.cta__role {
  margin: 0;
  font-weight: 600;
  font-size: 14px;
  color: #17141a;
}

.cta__days {
  margin: 0;
  font-weight: 700;
  font-size: 22px;
  color: #0a4fe8;
  transition: color 300ms ease-out, transform 300ms cubic-bezier(0.2, 1.4, 0.4, 1);
}

.cta__card.is-urgent .cta__days {
  color: #c2361a;
  transform: scale(1.12);
}

.cta__btn {
  appearance: none;
  border: 0;
  padding: 8px 20px;
  border-radius: 999px;
  background: #0a4fe8;
  color: #fff7e6;
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
  transition: background 300ms ease-out;
}

.cta__card.is-urgent .cta__btn {
  background: #c2361a;
}

.cta__meta {
  margin: 0;
}

.cta__chip {
  display: inline-flex;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(23, 20, 26, 0.08);
  color: #17141a;
  font-weight: 700;
  font-size: 11px;
}

@media (max-width: 340px) {
  .cta {
    max-width: 280px;
    gap: 4px;
  }
  .cta__hint {
    font-size: 9px;
  }
  .cta__card {
    padding: 8px;
    gap: 4px;
  }
  .cta__days {
    font-size: 18px;
  }
  .cta__btn {
    padding: 4px 16px;
    font-size: 12px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .cta__card,
  .cta__days,
  .cta__btn {
    transition: none;
  }
}

// 지원 마감 CTA(08) — 고정 기준시각(EPOCH, 캡처 재현성을 위해 실제 Date.now() 를 쓰지 않는다)
// 에서 마감일까지 남은 밀리초를 하루(86,400,000ms)로 나눠 Math.ceil 로 올린 값을 D-day 로
// 표시한다(계산 한 겹). 남은 일수가 URGENT_DAYS 이하로 좁혀지면 Urgent 상태(error 색)로 바뀐다.
(function () {
  var role = document.getElementById('ctaRole');
  var daysEl = document.getElementById('ctaDays');
  var btn = document.getElementById('ctaBtn');
  var chip = document.getElementById('ctaChip');
  var card = document.querySelector('.cta__card');
  if (!role || !daysEl || !btn || !chip || !card) return;
  var reduce = window.matchMedia('(prefers-reduced-motion: reduce)').matches;

  var EPOCH = new Date('2026-01-01T00:00:00Z').getTime();   // 고정 기준시각
  var DAY_MS = 86400000;
  var URGENT_DAYS = 3;

  var ROLES = [
    { name: 'Frontend Engineer', deadline: '2026-01-13T00:00:00Z' },
    { name: 'Product Designer', deadline: '2026-01-03T00:00:00Z' },
    { name: 'Backend Engineer', deadline: '2026-01-21T00:00:00Z' }
  ];
  var idx = 0;

  function daysLeft(deadlineIso) {
    var deadline = new Date(deadlineIso).getTime();
    return Math.ceil((deadline - EPOCH) / DAY_MS);
  }

  function apply(i) {
    var r = ROLES[i];
    var d = daysLeft(r.deadline);
    role.textContent = r.name;
    daysEl.textContent = 'D-' + d;
    var urgent = d <= URGENT_DAYS;
    card.classList.toggle('is-urgent', urgent);
    chip.textContent = 'Reference date 2026-01-01 · ' + (urgent ? 'Urgent' : 'Relaxed');
  }

  apply(idx);

  if (!reduce) {
    setInterval(function () {
      idx = (idx + 1) % ROLES.length;
      apply(idx);
    }, 700);
  }
})();

// TeamApplyCta — vanilla 판(run/338/demo/08-team-apply-cta/index.html) 의 React 포트.
// 고정 기준일에서 마감일까지 남은 날을 Math.ceil 로 올려 계산하고, 사흘 이하면
// 급함 상태로 바뀐다(계산 한 겹).
import { useEffect, useRef } from "react";
import styles from "./TeamApplyCta.module.scss";

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

const HINT = "고정 기준일에서 마감일까지 남은 날을 Math.ceil 로 올려 계산하고, 사흘 이하면 급함 상태로 바뀝니다";
const APPLY_LABEL = "지원하기";

const EPOCH = new Date("2026-01-01T00:00:00Z").getTime();
const DAY_MS = 86400000;
const URGENT_DAYS = 3;

type Role = { name: string; deadline: string };
const ROLES: Role[] = [
  { name: "프론트엔드 엔지니어", deadline: "2026-01-13T00:00:00Z" },
  { name: "프로덕트 디자이너", deadline: "2026-01-03T00:00:00Z" },
  { name: "백엔드 엔지니어", deadline: "2026-01-21T00:00:00Z" }
];

function daysLeft(deadlineIso: string): number {
  const deadline = new Date(deadlineIso).getTime();
  return Math.ceil((deadline - EPOCH) / DAY_MS);
}

export default function TeamApplyCta({
  duration = "300ms",
  easing = "ease-out",
  color = "#0a4fe8"
}: TeamApplyCtaProps) {
  const cardRef = useRef<HTMLDivElement | null>(null);
  const roleRef = useRef<HTMLParagraphElement | null>(null);
  const daysRef = useRef<HTMLParagraphElement | null>(null);
  const chipRef = useRef<HTMLSpanElement | null>(null);

  useEffect(() => {
    const card = cardRef.current;
    const roleEl = roleRef.current;
    const daysEl = daysRef.current;
    const chip = chipRef.current;
    if (!card || !roleEl || !daysEl || !chip) return;
    const reduce = window.matchMedia("(prefers-reduced-motion: reduce)").matches;

    function apply(i: number): void {
      const r = ROLES[i];
      const d = daysLeft(r.deadline);
      roleEl!.textContent = r.name;
      daysEl!.textContent = "D-" + d;
      const urgent = d <= URGENT_DAYS;
      card!.classList.toggle(styles.isUrgent, urgent);
      chip!.textContent = "기준일 2026-01-01 · " + (urgent ? "급함" : "여유");
    }

    let idx = 0;
    apply(0);

    let timer = 0;
    if (!reduce) {
      timer = window.setInterval(() => {
        idx = (idx + 1) % ROLES.length;
        apply(idx);
      }, 700);
    }

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

  return (
    <main className={styles.stage}>
      <section className={styles.cta}>
        <p className={styles.hint}>{HINT}</p>
        <div className={styles.card} ref={cardRef}>
          <p className={styles.role} ref={roleRef}>프론트엔드 엔지니어</p>
          <p className={styles.days} ref={daysRef} aria-live="polite">D-12</p>
          <button className={styles.btn} type="button" style={{ background: color }}>
            {APPLY_LABEL}
          </button>
        </div>
        <p className={styles.meta}>
          <span className={styles.chip} ref={chipRef}>기준일 2026-01-01</span>
        </p>
      </section>
    </main>
  );
}