08Milestone timeline

<main class="stage">
  <section class="mt is-demo" data-active="0">
    <p class="mt__desc" role="status">In 2019, three founders launched our first product from a tiny office.</p>
    <div class="mt__track">
      <span class="mt__fill" aria-hidden="true"></span>
      <ol class="mt__list">
        <li><button class="mt__stop" type="button" data-i="0" aria-current="step">
          <span class="mt__dot" aria-hidden="true"></span><span class="mt__year">2019</span><span class="mt__label">Founded</span>
        </button></li>
        <li><button class="mt__stop" type="button" data-i="1">
          <span class="mt__dot" aria-hidden="true"></span><span class="mt__year">2021</span><span class="mt__label">Series A</span>
        </button></li>
        <li><button class="mt__stop" type="button" data-i="2">
          <span class="mt__dot" aria-hidden="true"></span><span class="mt__year">2023</span><span class="mt__label">Global expansion</span>
        </button></li>
        <li><button class="mt__stop" type="button" data-i="3">
          <span class="mt__dot" aria-hidden="true"></span><span class="mt__year">2026</span><span class="mt__label">1M users</span>
        </button></li>
      </ol>
    </div>
  </section>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: $dur-base;                             // 진행바·설명 전환
$easing: $ease-spring;
$color: $subject-blue;                            // 진행바·현재 지점 색

@include stage($stage-paper);

.mt { width: min(420px, 95vw); }
.mt__desc {
  min-height: 32px;
  margin: 0 0 $sp-3;
  font-weight: 600; font-size: clamp(11px, 3.2vw, 12px); line-height: 1.5; font-family: inherit;
  color: $subject-ink;
}

.mt__track { position: relative; }
.mt__track::before {
  content: "";
  position: absolute; left: 0; right: 0; top: 4px;
  height: 3px;
  border-radius: $r-xs;
  background: rgba(23, 20, 26, .12);
}
.mt__fill {
  position: absolute; left: 0; right: 0; top: 4px;
  height: 3px;
  border-radius: $r-xs;
  background: $color;
  transform: scaleX(.25);
  transform-origin: left; // 규칙8: 진행바 left 채움
  transition: transform $duration $easing;
}

.mt__list { position: relative; list-style: none; margin: 0; padding: $sp-3 0 0; display: flex; justify-content: space-between; }
.mt__stop {
  display: flex; flex-direction: column; align-items: center; gap: $sp-1;
  border: 0; padding: 0; background: none; cursor: pointer;
}
.mt__dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: rgba(23, 20, 26, .3);
  transition: background $duration $easing, transform $duration $easing, box-shadow $duration $easing;
}
.mt__stop[aria-current="step"] .mt__dot {
  background: $color;
  transform: scale(1.3);
  box-shadow: 0 0 0 4px rgba(47, 109, 246, .18);
}
.mt__year { font-weight: 800; font-size: 10px; line-height: 1; font-family: inherit; color: $subject-ink; }
.mt__label { font-weight: 600; font-size: 9px; line-height: 1.3; font-family: inherit; color: rgba($subject-ink, .72); }

// ── 데모 루프: 현재 지점 점이 계속 펄스한다(항상 재생) ──────────────
.mt.is-demo .mt__stop[aria-current="step"] .mt__dot { animation: mt-pulse 2s $easing infinite; }
@keyframes mt-pulse {
  0%, 100% { box-shadow: 0 0 0 4px rgba(47, 109, 246, .18); }
  50%      { box-shadow: 0 0 0 8px rgba(47, 109, 246, .08); }
}

// ── 반응형(BD9) ──────────────────────────────────────────
@media (max-width: 340px), (max-height: 220px) {
  .mt__desc { min-height: 0; margin-bottom: $sp-2; font-size: 10px; }
  .mt__label { display: none; }
}

// ── 접근성 ──────────────────────────────────────────
@media (prefers-reduced-motion: reduce) {
  .mt__fill, .mt__dot { transition: none; }
  .mt.is-demo .mt__stop[aria-current="step"] .mt__dot { 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);
}

.mt {
  width: min(420px, 95vw);
}

.mt__desc {
  min-height: 32px;
  margin: 0 0 12px;
  font-weight: 600;
  font-size: clamp(11px, 3.2vw, 12px);
  line-height: 1.5;
  font-family: inherit;
  color: #17141a;
}

.mt__track {
  position: relative;
}

.mt__track::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 4px;
  height: 3px;
  border-radius: 4px;
  background: rgba(23, 20, 26, 0.12);
}

.mt__fill {
  position: absolute;
  left: 0;
  right: 0;
  top: 4px;
  height: 3px;
  border-radius: 4px;
  background: #2f6df6;
  transform: scaleX(0.25);
  transform-origin: left;
  transition: transform 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.mt__list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 12px 0 0;
  display: flex;
  justify-content: space-between;
}

.mt__stop {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  border: 0;
  padding: 0;
  background: none;
  cursor: pointer;
}

.mt__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(23, 20, 26, 0.3);
  transition: background 300ms cubic-bezier(0.2, 0.8, 0.2, 1), transform 300ms cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.mt__stop[aria-current=step] .mt__dot {
  background: #2f6df6;
  transform: scale(1.3);
  box-shadow: 0 0 0 4px rgba(47, 109, 246, 0.18);
}

.mt__year {
  font-weight: 800;
  font-size: 10px;
  line-height: 1;
  font-family: inherit;
  color: #17141a;
}

.mt__label {
  font-weight: 600;
  font-size: 9px;
  line-height: 1.3;
  font-family: inherit;
  color: rgba(23, 20, 26, 0.72);
}

.mt.is-demo .mt__stop[aria-current=step] .mt__dot {
  animation: mt-pulse 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

@keyframes mt-pulse {
  0%, 100% {
    box-shadow: 0 0 0 4px rgba(47, 109, 246, 0.18);
  }
  50% {
    box-shadow: 0 0 0 8px rgba(47, 109, 246, 0.08);
  }
}
@media (max-width: 340px), (max-height: 220px) {
  .mt__desc {
    min-height: 0;
    margin-bottom: 8px;
    font-size: 10px;
  }
  .mt__label {
    display: none;
  }
}
@media (prefers-reduced-motion: reduce) {
  .mt__fill, .mt__dot {
    transition: none;
  }
  .mt.is-demo .mt__stop[aria-current=step] .mt__dot {
    animation: none !important;
  }
}

// 실제 동작: 연혁을 클릭하면 그 지점까지 진행바가 scaleX 로 실제로 채워지고 설명 문단이 바뀐다.
var milestoneNotes = [
  'In 2019, three founders launched our first product from a tiny office.',
  'In 2021, we raised a Series A and grew the team tenfold.',
  'In 2023, we opened offices in Japan and the US and went global.',
  'In 2026, we passed one million registered users.'
];
var root = document.querySelector('.mt');
var stops = root.querySelectorAll('.mt__stop');
var desc = root.querySelector('.mt__desc');
stops.forEach(function (btn) {
  btn.addEventListener('click', function () {
    root.classList.remove('is-demo');
    var i = Number(btn.getAttribute('data-i'));
    root.setAttribute('data-active', String(i));
    root.querySelector('.mt__fill').style.transform = 'scaleX(' + ((i + 1) / 4) + ')';
    stops.forEach(function (s) { s.removeAttribute('aria-current'); });
    btn.setAttribute('aria-current', 'step');
    desc.textContent = milestoneNotes[i];
  });
});

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

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

const STOPS = [
  { year: "2019", label: "창립", desc: "2019년, 세 명이 작은 사무실에서 첫 제품을 출시했습니다." },
  { year: "2021", label: "시리즈 A", desc: "2021년, 시리즈 A 투자를 유치하며 팀을 열 배로 키웠습니다." },
  { year: "2023", label: "해외 진출", desc: "2023년, 일본·미국 지사를 열고 해외 진출을 시작했습니다." },
  { year: "2026", label: "100만 사용자", desc: "2026년, 누적 가입자 100만 명을 넘겼습니다." },
];

export default function PressMilestoneTimeline({ duration = 300, easing = "cubic-bezier(.2,.8,.2,1)", color = "#2f6df6" }: PressMilestoneTimelineProps) {
  const [active, setActive] = useState(0);
  const [interacted, setInteracted] = useState(false);
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <section className={interacted ? styles.mt : `${styles.mt} ${styles.demo}`} style={vars}>
      <p className={styles.desc} role="status">{STOPS[active].desc}</p>
      <div className={styles.track}>
        <span className={styles.fill} style={{ transform: `scaleX(${(active + 1) / STOPS.length})` }} aria-hidden="true" />
        <ol className={styles.list}>
          {STOPS.map((s, i) => (
            <li key={s.year}>
              <button
                type="button"
                className={styles.stop}
                aria-current={i === active ? "step" : undefined}
                onClick={() => { setInteracted(true); setActive(i); }}
              >
                <span className={styles.dot} aria-hidden="true" />
                <span className={styles.year}>{s.year}</span>
                <span className={styles.label}>{s.label}</span>
              </button>
            </li>
          ))}
        </ol>
      </div>
    </section>
  );
}