03Speaker grid

<main class="stage">
  <ul class="sg is-demo">
    <li class="sg__card"><button class="sg__toggle" type="button" aria-expanded="false">
      <span class="sg__avatar" aria-hidden="true">J. Kim</span>
      <span class="sg__name">Minjun Kim</span>
      <span class="sg__role">Product Designer · Team ○○</span>
    </button><p class="sg__bio">How to design screens that need no explanation.</p></li>
    <li class="sg__card"><button class="sg__toggle" type="button" aria-expanded="false">
      <span class="sg__avatar" aria-hidden="true">S. Lee</span>
      <span class="sg__name">Seoyeon Lee</span>
      <span class="sg__role">Engineering Lead · ○○ Studio</span>
    </button><p class="sg__bio">Ship fast, roll back before it's too late.</p></li>
    <li class="sg__card"><button class="sg__toggle" type="button" aria-expanded="false">
      <span class="sg__avatar" aria-hidden="true">D. Park</span>
      <span class="sg__name">Doyoon Park</span>
      <span class="sg__role">Growth Manager · ○○ Commerce</span>
    </button><p class="sg__bio">Three user signals to check before the numbers.</p></li>
    <li class="sg__card"><button class="sg__toggle" type="button" aria-expanded="false">
      <span class="sg__avatar" aria-hidden="true">Y. Choi</span>
      <span class="sg__name">Yuna Choi</span>
      <span class="sg__role">Researcher · ○○ Lab</span>
    </button><p class="sg__bio">What ten interviews show, what a hundred show.</p></li>
    <li class="sg__card"><button class="sg__toggle" type="button" aria-expanded="false">
      <span class="sg__avatar" aria-hidden="true">H. Jung</span>
      <span class="sg__name">Haeun Jung</span>
      <span class="sg__role">Founder · ○○</span>
    </button><p class="sg__bio">Three failures, only the lessons, kept short.</p></li>
    <li class="sg__card"><button class="sg__toggle" type="button" aria-expanded="false">
      <span class="sg__avatar" aria-hidden="true">J. Han</span>
      <span class="sg__name">Jiho Han</span>
      <span class="sg__role">Platform Engineer · ○○</span>
    </button><p class="sg__bio">When traffic spikes 10x, what breaks first?</p></li>
  </ul>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: $dur-enter;                             // 카드 들어오는 시간
$easing: $ease-pop;
$color: $subject-ink;                              // 아바타 배경색

@include stage($stage-orange);

.sg {
  list-style: none; margin: 0; padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: $sp-3;
  width: min(420px, 94vw);
}
@media (max-width: 340px), (max-height: 220px) {
  // 2열로 바꾸면 6장이 3행이 돼 더 길어진다 — 3열을 유지하고 카드 안쪽만 줄인다
  .sg { gap: $sp-1; }
  .sg__toggle { padding: $sp-1; gap: $sp-1; }
  .sg__avatar { width: $sp-5; height: $sp-5; font-size: 9px; }
  .sg__role { display: none; }
}

.sg__card {
  background: $subject-cream;
  border-radius: $r-card;
  overflow: hidden;
}
.sg__toggle {
  display: flex; flex-direction: column; align-items: center; gap: $sp-1;
  width: 100%;
  padding: $sp-2;
  border: 0; background: none; cursor: pointer;
  font: inherit; text-align: center;
  -webkit-tap-highlight-color: transparent;
}
.sg__avatar {
  width: $sp-6; height: $sp-6;
  display: grid; place-items: center;
  border-radius: 50%;
  background: $color;
  color: $subject-cream;
  font-weight: 700; font-size: 10px; line-height: 1; font-family: inherit;
}
.sg__name { font-weight: 700; font-size: clamp(11px, 3vw, 12px); line-height: 1.2; font-family: inherit; color: $subject-ink; }
.sg__role { font-weight: 500; font-size: 9px; line-height: 1.3; font-family: inherit; color: rgba($subject-ink, .72); }

.sg__bio {
  margin: 0;
  padding: 0 $sp-2;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-weight: 500; font-size: 9px; line-height: 1.4; font-family: inherit;
  color: rgba(23, 20, 26, .7);
  transition: max-height $duration $easing, opacity $duration $easing, padding-bottom $duration $easing;
}
.sg__card.is-open .sg__bio {
  max-height: 60px;
  opacity: 1;
  padding-bottom: $sp-3;
}

// ── 데모 루프: 카드가 순서대로 살짝 기울며 떠오르고, 두 번째 카드는 소개까지 펼쳤다 접는다 ──────────────
.sg.is-demo .sg__card { animation: sg-in $dur-loop $easing infinite; }
.sg.is-demo .sg__card:nth-child(1) { animation-delay: 0ms; }
.sg.is-demo .sg__card:nth-child(2) { animation-delay: 90ms; }
.sg.is-demo .sg__card:nth-child(3) { animation-delay: 180ms; }
.sg.is-demo .sg__card:nth-child(4) { animation-delay: 270ms; }
.sg.is-demo .sg__card:nth-child(5) { animation-delay: 360ms; }
.sg.is-demo .sg__card:nth-child(6) { animation-delay: 450ms; }
@keyframes sg-in {
  0%       { opacity: .7; transform: translateY(6px) rotate(-1.5deg); }
  18%      { opacity: 1; transform: translateY(0) rotate(0deg); }
  86%      { opacity: 1; transform: translateY(0) rotate(0deg); }
  100%     { opacity: .7; transform: translateY(6px) rotate(-1.5deg); }
}

// ── 접근성 ──────────────────────────────────────────
@media (prefers-reduced-motion: reduce) {
  .sg__bio { transition: none; }
  .sg.is-demo .sg__card,
  .sg.is-demo .sg__card .sg__bio { 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: #ff4d1f;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.sg {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  width: min(420px, 94vw);
}

@media (max-width: 340px), (max-height: 220px) {
  .sg {
    gap: 4px;
  }
  .sg__toggle {
    padding: 4px;
    gap: 4px;
  }
  .sg__avatar {
    width: 20px;
    height: 20px;
    font-size: 9px;
  }
  .sg__role {
    display: none;
  }
}
.sg__card {
  background: #fff7e6;
  border-radius: 16px;
  overflow: hidden;
}

.sg__toggle {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  width: 100%;
  padding: 8px;
  border: 0;
  background: none;
  cursor: pointer;
  font: inherit;
  text-align: center;
  -webkit-tap-highlight-color: transparent;
}

.sg__avatar {
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: #17141a;
  color: #fff7e6;
  font-weight: 700;
  font-size: 10px;
  line-height: 1;
  font-family: inherit;
}

.sg__name {
  font-weight: 700;
  font-size: clamp(11px, 3vw, 12px);
  line-height: 1.2;
  font-family: inherit;
  color: #17141a;
}

.sg__role {
  font-weight: 500;
  font-size: 9px;
  line-height: 1.3;
  font-family: inherit;
  color: rgba(23, 20, 26, 0.72);
}

.sg__bio {
  margin: 0;
  padding: 0 8px;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-weight: 500;
  font-size: 9px;
  line-height: 1.4;
  font-family: inherit;
  color: rgba(23, 20, 26, 0.7);
  transition: max-height 600ms cubic-bezier(0.2, 1.4, 0.4, 1), opacity 600ms cubic-bezier(0.2, 1.4, 0.4, 1), padding-bottom 600ms cubic-bezier(0.2, 1.4, 0.4, 1);
}

.sg__card.is-open .sg__bio {
  max-height: 60px;
  opacity: 1;
  padding-bottom: 12px;
}

.sg.is-demo .sg__card {
  animation: sg-in 2s cubic-bezier(0.2, 1.4, 0.4, 1) infinite;
}

.sg.is-demo .sg__card:nth-child(1) {
  animation-delay: 0ms;
}

.sg.is-demo .sg__card:nth-child(2) {
  animation-delay: 90ms;
}

.sg.is-demo .sg__card:nth-child(3) {
  animation-delay: 180ms;
}

.sg.is-demo .sg__card:nth-child(4) {
  animation-delay: 270ms;
}

.sg.is-demo .sg__card:nth-child(5) {
  animation-delay: 360ms;
}

.sg.is-demo .sg__card:nth-child(6) {
  animation-delay: 450ms;
}

@keyframes sg-in {
  0% {
    opacity: 0.7;
    transform: translateY(6px) rotate(-1.5deg);
  }
  18% {
    opacity: 1;
    transform: translateY(0) rotate(0deg);
  }
  86% {
    opacity: 1;
    transform: translateY(0) rotate(0deg);
  }
  100% {
    opacity: 0.7;
    transform: translateY(6px) rotate(-1.5deg);
  }
}
@media (prefers-reduced-motion: reduce) {
  .sg__bio {
    transition: none;
  }
  .sg.is-demo .sg__card,
  .sg.is-demo .sg__card .sg__bio {
    animation: none !important;
  }
}

// 실제 동작: 카드를 클릭하면 그 카드만 한 줄 소개가 실제로 펼쳐진다.
document.querySelectorAll('.sg__toggle').forEach(function (btn) {
  btn.addEventListener('click', function () {
    document.querySelector('.sg').classList.remove('is-demo');
    var open = btn.getAttribute('aria-expanded') === 'true';
    btn.setAttribute('aria-expanded', String(!open));
    btn.closest('.sg__card').classList.toggle('is-open', !open);
  });
});

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

const SPEAKERS = [
  { initials: "김민", name: "김민준", role: "프로덕트 디자이너 · ○○팀", bio: "\"설명이 필요 없는 화면\"을 만드는 법을 발표합니다." },
  { initials: "이서", name: "이서연", role: "엔지니어링 리드 · ○○ 스튜디오", bio: "빠르게 만들고 늦지 않게 되돌리는 배포 이야기." },
  { initials: "박도", name: "박도윤", role: "그로스 매니저 · ○○ 커머스", bio: "숫자보다 먼저 봐야 하는 사용자 신호 세 가지." },
  { initials: "최유", name: "최유나", role: "리서처 · ○○ 랩", bio: "인터뷰 열 번이면 보이는 것, 백 번이면 보이는 것." },
  { initials: "정하", name: "정하은", role: "창업자 · ○○", bio: "세 번 실패하고 배운 것만 골라 짧게 말합니다." },
  { initials: "한지", name: "한지호", role: "플랫폼 엔지니어 · ○○", bio: "트래픽 열 배가 몰릴 때 먼저 죽는 곳은 어디인가." },
];

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

export default function SpeakerGrid({ duration = 600, easing = "cubic-bezier(.2,1.4,.4,1)", color = "#17141a" }: SpeakerGridProps) {
  const [open, setOpen] = useState<number | null>(null);
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <ul className={styles.sg} style={vars}>
      {SPEAKERS.map((s, i) => (
        <li key={s.name} className={styles.card}>
          <button
            type="button"
            className={styles.toggle}
            aria-expanded={open === i}
            onClick={() => setOpen((o) => (o === i ? null : i))}
          >
            <span className={styles.avatar} aria-hidden="true">{s.initials}</span>
            <span className={styles.name}>{s.name}</span>
            <span className={styles.role}>{s.role}</span>
          </button>
          <p className={styles.bio} style={{ maxHeight: open === i ? 60 : 0, opacity: open === i ? 1 : 0 }}>{s.bio}</p>
        </li>
      ))}
    </ul>
  );
}