09Team grid expand

<main class="stage">
  <div class="tg is-demo">
    <p class="tg__head">
      <svg viewBox="0 0 256 256" width="15" height="15" aria-hidden="true"><g fill="currentColor"><path d="M168 144a40 40 0 1 1-40-40a40 40 0 0 1 40 40M64 56a32 32 0 1 0 32 32a32 32 0 0 0-32-32m128 0a32 32 0 1 0 32 32a32 32 0 0 0-32-32" opacity=".2"/><path d="M244.8 150.4a8 8 0 0 1-11.2-1.6A51.6 51.6 0 0 0 192 128a8 8 0 0 1 0-16a24 24 0 1 0-23.24-30a8 8 0 1 1-15.5-4A40 40 0 1 1 219 117.51a67.94 67.94 0 0 1 27.43 21.68a8 8 0 0 1-1.63 11.21M190.92 212a8 8 0 1 1-13.85 8a57 57 0 0 0-98.15 0a8 8 0 1 1-13.84-8a72.06 72.06 0 0 1 33.74-29.92a48 48 0 1 1 58.36 0A72.06 72.06 0 0 1 190.92 212M128 176a32 32 0 1 0-32-32a32 32 0 0 0 32 32m-56-56a8 8 0 0 0-8-8a24 24 0 1 1 23.24-30a8 8 0 1 0 15.5-4A40 40 0 1 0 37 117.51a67.94 67.94 0 0 0-27.4 21.68a8 8 0 1 0 12.8 9.61A51.6 51.6 0 0 1 64 128a8 8 0 0 0 8-8"/></g></svg>
      Team members
    </p>
    <div class="tg__row">
      <div class="tg__tile is-open">
        <button class="tg__main" type="button" aria-expanded="true">
          <span class="tg__avatar tg__avatar--a" aria-hidden="true">JH</span>
          <span class="tg__name">Juha Kang</span>
          <span class="tg__role">Team lead</span>
        </button>
        <button class="tg__follow" type="button" aria-pressed="false">
          <span class="tg__f-off"><svg viewBox="0 0 256 256" width="13" height="13" aria-hidden="true"><g fill="currentColor"><path d="M168 100a60 60 0 1 1-60-60a60 60 0 0 1 60 60" opacity=".2"/><path d="M256 136a8 8 0 0 1-8 8h-16v16a8 8 0 0 1-16 0v-16h-16a8 8 0 0 1 0-16h16v-16a8 8 0 0 1 16 0v16h16a8 8 0 0 1 8 8m-57.87 58.85a8 8 0 0 1-12.26 10.3C165.75 181.19 138.09 168 108 168s-57.75 13.19-77.87 37.15a8 8 0 0 1-12.25-10.3c14.94-17.78 33.52-30.41 54.17-37.17a68 68 0 1 1 71.9 0c20.65 6.76 39.23 19.39 54.18 37.17M108 152a52 52 0 1 0-52-52a52.06 52.06 0 0 0 52 52"/></g></svg>Follow</span>
          <span class="tg__f-on"><svg viewBox="0 0 256 256" width="13" height="13" aria-hidden="true"><g fill="currentColor"><path d="M232 56v144a16 16 0 0 1-16 16H40a16 16 0 0 1-16-16V56a16 16 0 0 1 16-16h176a16 16 0 0 1 16 16" opacity=".2"/><path d="m205.66 85.66l-96 96a8 8 0 0 1-11.32 0l-40-40a8 8 0 0 1 11.32-11.32L104 164.69l90.34-90.35a8 8 0 0 1 11.32 11.32"/></g></svg>Following</span>
        </button>
      </div>
      <div class="tg__tile">
        <button class="tg__main" type="button" aria-expanded="false">
          <span class="tg__avatar tg__avatar--b" aria-hidden="true">ES</span>
          <span class="tg__name">Eunseol Noh</span>
          <span class="tg__role">Product designer</span>
        </button>
        <button class="tg__follow" type="button" aria-pressed="false">
          <span class="tg__f-off"><svg viewBox="0 0 256 256" width="13" height="13" aria-hidden="true"><g fill="currentColor"><path d="M168 100a60 60 0 1 1-60-60a60 60 0 0 1 60 60" opacity=".2"/><path d="M256 136a8 8 0 0 1-8 8h-16v16a8 8 0 0 1-16 0v-16h-16a8 8 0 0 1 0-16h16v-16a8 8 0 0 1 16 0v16h16a8 8 0 0 1 8 8m-57.87 58.85a8 8 0 0 1-12.26 10.3C165.75 181.19 138.09 168 108 168s-57.75 13.19-77.87 37.15a8 8 0 0 1-12.25-10.3c14.94-17.78 33.52-30.41 54.17-37.17a68 68 0 1 1 71.9 0c20.65 6.76 39.23 19.39 54.18 37.17M108 152a52 52 0 1 0-52-52a52.06 52.06 0 0 0 52 52"/></g></svg>Follow</span>
          <span class="tg__f-on"><svg viewBox="0 0 256 256" width="13" height="13" aria-hidden="true"><g fill="currentColor"><path d="M232 56v144a16 16 0 0 1-16 16H40a16 16 0 0 1-16-16V56a16 16 0 0 1 16-16h176a16 16 0 0 1 16 16" opacity=".2"/><path d="m205.66 85.66l-96 96a8 8 0 0 1-11.32 0l-40-40a8 8 0 0 1 11.32-11.32L104 164.69l90.34-90.35a8 8 0 0 1 11.32 11.32"/></g></svg>Following</span>
        </button>
      </div>
      <div class="tg__tile">
        <button class="tg__main" type="button" aria-expanded="false">
          <span class="tg__avatar tg__avatar--c" aria-hidden="true">GO</span>
          <span class="tg__name">Gaon Im</span>
          <span class="tg__role">Front-end dev</span>
        </button>
        <button class="tg__follow" type="button" aria-pressed="false">
          <span class="tg__f-off"><svg viewBox="0 0 256 256" width="13" height="13" aria-hidden="true"><g fill="currentColor"><path d="M168 100a60 60 0 1 1-60-60a60 60 0 0 1 60 60" opacity=".2"/><path d="M256 136a8 8 0 0 1-8 8h-16v16a8 8 0 0 1-16 0v-16h-16a8 8 0 0 1 0-16h16v-16a8 8 0 0 1 16 0v16h16a8 8 0 0 1 8 8m-57.87 58.85a8 8 0 0 1-12.26 10.3C165.75 181.19 138.09 168 108 168s-57.75 13.19-77.87 37.15a8 8 0 0 1-12.25-10.3c14.94-17.78 33.52-30.41 54.17-37.17a68 68 0 1 1 71.9 0c20.65 6.76 39.23 19.39 54.18 37.17M108 152a52 52 0 1 0-52-52a52.06 52.06 0 0 0 52 52"/></g></svg>Follow</span>
          <span class="tg__f-on"><svg viewBox="0 0 256 256" width="13" height="13" aria-hidden="true"><g fill="currentColor"><path d="M232 56v144a16 16 0 0 1-16 16H40a16 16 0 0 1-16-16V56a16 16 0 0 1 16-16h176a16 16 0 0 1 16 16" opacity=".2"/><path d="m205.66 85.66l-96 96a8 8 0 0 1-11.32 0l-40-40a8 8 0 0 1 11.32-11.32L104 164.69l90.34-90.35a8 8 0 0 1 11.32 11.32"/></g></svg>Following</span>
        </button>
      </div>
    </div>
  </div>
</main>

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

$duration: $dur-base;     // 타일이 넓어지는 시간
$easing:   $ease-spring;
$color:    $subject-blue;

@include stage($stage-ink);

.tg { width: 320px; }
.tg__head {
  display: flex;
  align-items: center;
  gap: $sp-2;
  margin: 0 0 $sp-3;
  font-weight: 700;
  font-size: 13px;
  line-height: 18px;
  color: $subject-cream;
}
.tg__head svg { flex: none; color: rgba(255, 255, 255, .55); }

.tg__row { display: flex; gap: $sp-2; }
.tg__tile {
  position: relative;
  flex: 1 1 0;
  min-width: 0;
  height: 136px;
  border-radius: $r-card;
  background: rgba(255, 255, 255, .07);
  overflow: hidden;                                    // 접힌 타일에서 넘치는 글자는 잘린다
  flex-grow: 1;
  transition: flex-grow $duration $easing, background $duration $easing;
}
.tg__tile.is-open { flex-grow: 2.6; background: rgba(255, 255, 255, .15); }

.tg__main {
  position: absolute;
  inset: 0;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: $sp-1;
  padding: $sp-3 $sp-2 $sp-10;
  border: 0;
  background: transparent;
  color: $subject-cream;
  text-align: center;
  cursor: pointer;
  touch-action: manipulation;
}
.tg__main:focus-visible { outline: 2px solid $color; outline-offset: -2px; border-radius: $r-card; }
.tg__avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  color: $subject-ink;
  font-weight: 800;
  font-size: 13px;
  line-height: 16px;
}
.tg__avatar--a { background: linear-gradient(135deg, $subject-blue, $subject-lilac); }
.tg__avatar--b { background: linear-gradient(135deg, $subject-pink, $subject-lilac); }
.tg__avatar--c { background: linear-gradient(135deg, $subject-mint, $subject-sky); }
.tg__name {
  max-width: 100%;
  font-weight: 800;
  font-size: 13px;
  line-height: 17px;
  color: $subject-cream;
  white-space: nowrap;
}
.tg__role {
  max-width: 100%;
  font-weight: 600;
  font-size: 11px;
  line-height: 14px;
  color: rgba(255, 255, 255, .62);
  white-space: nowrap;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity $duration $easing, transform $duration $easing;
}
.tg__tile.is-open .tg__role { opacity: 1; transform: translateY(0); }

.tg__follow {
  position: absolute;
  left: $sp-2;
  right: $sp-2;
  bottom: $sp-3;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: $sp-1;
  height: 28px;
  border: 0;
  border-radius: $r-control;
  background: $color;
  color: #fff;
  font-weight: 700;
  font-size: 12px;
  line-height: 14px;
  white-space: nowrap;
  cursor: pointer;
  touch-action: manipulation;
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: opacity $duration $easing, transform $duration $easing, background $dur-quick $easing;
}
.tg__tile.is-open .tg__follow { opacity: 1; transform: translateY(0); pointer-events: auto; }
.tg__follow:focus-visible { outline: 2px solid $subject-cream; outline-offset: 2px; }
.tg__follow.is-on { background: rgba(255, 255, 255, .18); color: $subject-cream; }
.tg__f-off,
.tg__f-on { display: inline-flex; align-items: center; gap: $sp-1; }
.tg__f-on { display: none; }
.tg__follow.is-on .tg__f-off { display: none; }
.tg__follow.is-on .tg__f-on { display: inline-flex; }

// ── 자동 루프: 1번 → 2번 → 3번 순으로 flex-grow 가 커졌다 작아진다.
//    시차는 animation: 단축이 delay 를 0 으로 리셋하므로 낱개 속성 + animation-delay 로 준다.
//    마지막 타일도 87%(1744ms) 안에 1 로 돌아오고 끝까지 그대로 → 텔레포트 없음.
//    ⚠ 직함·팔로우 버튼을 opacity 로 부드럽게 띄우면 poster 에 "반투명 유령" 이 찍힌다 (실측 2026-09-12).
//    그래서 (1) 펼치기는 ease-in — 다 펼쳐지는 마지막 한 프레임이 가장 크게 변하고,
//    (2) 직함·버튼은 바로 그 프레임에 steps(1, end) 로 컷 등장하며,
//    (3) 되돌아오기는 linear 로 여러 프레임에 고르게 나눠 그 프레임을 넘지 않게 한다.
//    → 최대 변화 프레임 = "완전히 펼쳐진 타일 + 또렷한 직함·버튼" 이 poster 가 된다. ──
.tg.is-demo .tg__tile {
  animation-name: tg-grow;
  animation-duration: $dur-loop;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
}
.tg.is-demo .tg__role,
.tg.is-demo .tg__follow {
  animation-name: tg-detail;
  animation-duration: $dur-loop;
  animation-timing-function: steps(1, end);
  animation-iteration-count: infinite;
  animation-fill-mode: backwards;
}
.tg.is-demo .tg__tile:nth-child(2),
.tg.is-demo .tg__tile:nth-child(2) .tg__role,
.tg.is-demo .tg__tile:nth-child(2) .tg__follow { animation-delay: 583ms; }
.tg.is-demo .tg__tile:nth-child(3),
.tg.is-demo .tg__tile:nth-child(3) .tg__role,
.tg.is-demo .tg__tile:nth-child(3) .tg__follow { animation-delay: 1166ms; }
@keyframes tg-grow {
  0% { flex-grow: 1; animation-timing-function: cubic-bezier(.55, 0, .85, .25); }
  12.2% { flex-grow: 2.6; }
  16.4% { flex-grow: 2.6; }
  28.9% { flex-grow: 1; }
  100% { flex-grow: 1; }
}
@keyframes tg-detail {
  0% { opacity: 0; transform: translateY(8px); }
  12.2% { opacity: 1; transform: translateY(0); }
  20% { opacity: 0; transform: translateY(8px); }
  100% { opacity: 0; transform: translateY(8px); }
}

@media (max-width: 340px) {
  .tg { width: 272px; }
  .tg__head { gap: $sp-1; margin-bottom: $sp-2; font-size: 12px; line-height: 15px; }
  .tg__row { gap: $sp-1; }
  .tg__tile { height: 104px; }
  .tg__main { gap: 0; padding: $sp-2 $sp-1 $sp-8; }
  .tg__avatar { width: 28px; height: 28px; font-size: 11px; line-height: 14px; }
  .tg__name { font-size: 12px; line-height: 15px; }
  .tg__role { font-size: 10px; line-height: 12px; }
  .tg__follow { left: $sp-1; right: $sp-1; bottom: $sp-2; height: 28px; font-size: 11px; line-height: 13px; }
  .tg__follow svg { width: 12px; height: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  .tg.is-demo .tg__tile,
  .tg.is-demo .tg__role,
  .tg.is-demo .tg__follow { animation: none !important; }
  .tg__tile, .tg__role, .tg__follow { 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);
}

.tg {
  width: 320px;
}

.tg__head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 12px;
  font-weight: 700;
  font-size: 13px;
  line-height: 18px;
  color: #fff7e6;
}

.tg__head svg {
  flex: none;
  color: rgba(255, 255, 255, 0.55);
}

.tg__row {
  display: flex;
  gap: 8px;
}

.tg__tile {
  position: relative;
  flex: 1 1 0;
  min-width: 0;
  height: 136px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.07);
  overflow: hidden;
  flex-grow: 1;
  transition: flex-grow 300ms cubic-bezier(0.2, 0.8, 0.2, 1), background 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.tg__tile.is-open {
  flex-grow: 2.6;
  background: rgba(255, 255, 255, 0.15);
}

.tg__main {
  position: absolute;
  inset: 0;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 12px 8px 40px;
  border: 0;
  background: transparent;
  color: #fff7e6;
  text-align: center;
  cursor: pointer;
  touch-action: manipulation;
}

.tg__main:focus-visible {
  outline: 2px solid #2f6df6;
  outline-offset: -2px;
  border-radius: 16px;
}

.tg__avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  color: #17141a;
  font-weight: 800;
  font-size: 13px;
  line-height: 16px;
}

.tg__avatar--a {
  background: linear-gradient(135deg, #2f6df6, #b9a0ff);
}

.tg__avatar--b {
  background: linear-gradient(135deg, #ff9ebb, #b9a0ff);
}

.tg__avatar--c {
  background: linear-gradient(135deg, #4cd4a6, #6ec8ff);
}

.tg__name {
  max-width: 100%;
  font-weight: 800;
  font-size: 13px;
  line-height: 17px;
  color: #fff7e6;
  white-space: nowrap;
}

.tg__role {
  max-width: 100%;
  font-weight: 600;
  font-size: 11px;
  line-height: 14px;
  color: rgba(255, 255, 255, 0.62);
  white-space: nowrap;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 300ms cubic-bezier(0.2, 0.8, 0.2, 1), transform 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.tg__tile.is-open .tg__role {
  opacity: 1;
  transform: translateY(0);
}

.tg__follow {
  position: absolute;
  left: 8px;
  right: 8px;
  bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  height: 28px;
  border: 0;
  border-radius: 12px;
  background: #2f6df6;
  color: #fff;
  font-weight: 700;
  font-size: 12px;
  line-height: 14px;
  white-space: nowrap;
  cursor: pointer;
  touch-action: manipulation;
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: opacity 300ms cubic-bezier(0.2, 0.8, 0.2, 1), transform 300ms cubic-bezier(0.2, 0.8, 0.2, 1), background 220ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.tg__tile.is-open .tg__follow {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.tg__follow:focus-visible {
  outline: 2px solid #fff7e6;
  outline-offset: 2px;
}

.tg__follow.is-on {
  background: rgba(255, 255, 255, 0.18);
  color: #fff7e6;
}

.tg__f-off,
.tg__f-on {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.tg__f-on {
  display: none;
}

.tg__follow.is-on .tg__f-off {
  display: none;
}

.tg__follow.is-on .tg__f-on {
  display: inline-flex;
}

.tg.is-demo .tg__tile {
  animation-name: tg-grow;
  animation-duration: 2s;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
}

.tg.is-demo .tg__role,
.tg.is-demo .tg__follow {
  animation-name: tg-detail;
  animation-duration: 2s;
  animation-timing-function: steps(1, end);
  animation-iteration-count: infinite;
  animation-fill-mode: backwards;
}

.tg.is-demo .tg__tile:nth-child(2),
.tg.is-demo .tg__tile:nth-child(2) .tg__role,
.tg.is-demo .tg__tile:nth-child(2) .tg__follow {
  animation-delay: 583ms;
}

.tg.is-demo .tg__tile:nth-child(3),
.tg.is-demo .tg__tile:nth-child(3) .tg__role,
.tg.is-demo .tg__tile:nth-child(3) .tg__follow {
  animation-delay: 1166ms;
}

@keyframes tg-grow {
  0% {
    flex-grow: 1;
    animation-timing-function: cubic-bezier(0.55, 0, 0.85, 0.25);
  }
  12.2% {
    flex-grow: 2.6;
  }
  16.4% {
    flex-grow: 2.6;
  }
  28.9% {
    flex-grow: 1;
  }
  100% {
    flex-grow: 1;
  }
}
@keyframes tg-detail {
  0% {
    opacity: 0;
    transform: translateY(8px);
  }
  12.2% {
    opacity: 1;
    transform: translateY(0);
  }
  20% {
    opacity: 0;
    transform: translateY(8px);
  }
  100% {
    opacity: 0;
    transform: translateY(8px);
  }
}
@media (max-width: 340px) {
  .tg {
    width: 272px;
  }
  .tg__head {
    gap: 4px;
    margin-bottom: 8px;
    font-size: 12px;
    line-height: 15px;
  }
  .tg__row {
    gap: 4px;
  }
  .tg__tile {
    height: 104px;
  }
  .tg__main {
    gap: 0;
    padding: 8px 4px 32px;
  }
  .tg__avatar {
    width: 28px;
    height: 28px;
    font-size: 11px;
    line-height: 14px;
  }
  .tg__name {
    font-size: 12px;
    line-height: 15px;
  }
  .tg__role {
    font-size: 10px;
    line-height: 12px;
  }
  .tg__follow {
    left: 4px;
    right: 4px;
    bottom: 8px;
    height: 28px;
    font-size: 11px;
    line-height: 13px;
  }
  .tg__follow svg {
    width: 12px;
    height: 12px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .tg.is-demo .tg__tile,
  .tg.is-demo .tg__role,
  .tg.is-demo .tg__follow {
    animation: none !important;
  }
  .tg__tile, .tg__role, .tg__follow {
    transition: none;
  }
}

// 실제 동작: 호버·클릭·화살표로 타일 하나가 넓어지고(flex-grow) 그 안의 직함·팔로우가 올라온다.
var root = document.querySelector('.tg');
var tiles = [].slice.call(document.querySelectorAll('.tg__tile'));
var mains = tiles.map(function (t) { return t.querySelector('.tg__main'); });
var at = 0;
function open(i) {
  at = Math.max(0, Math.min(i, tiles.length - 1));
  tiles.forEach(function (t, k) {
    t.classList.toggle('is-open', k === at);
    mains[k].setAttribute('aria-expanded', String(k === at));
  });
}
tiles.forEach(function (tile, i) {
  tile.addEventListener('pointerenter', function () { root.classList.remove('is-demo'); open(i); });
  mains[i].addEventListener('click', function () { root.classList.remove('is-demo'); open(i); });
  mains[i].addEventListener('keydown', function (e) {
    if (e.key !== 'ArrowLeft' && e.key !== 'ArrowRight') return;
    e.preventDefault();
    root.classList.remove('is-demo');
    var next = (i + (e.key === 'ArrowRight' ? 1 : tiles.length - 1)) % tiles.length;
    open(next);
    mains[next].focus({ preventScroll: true });
  });
  tile.querySelector('.tg__follow').addEventListener('click', function () {
    root.classList.remove('is-demo');
    var b = tile.querySelector('.tg__follow');
    var on = b.getAttribute('aria-pressed') !== 'true';
    b.setAttribute('aria-pressed', String(on));
    b.classList.toggle('is-on', on);
  });
});

import { useRef, useState } from "react";
import type { CSSProperties } from "react";
import styles from "./TeamGridCard.module.scss";

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

type Vars = CSSProperties & { "--duration"?: string; "--easing"?: string; "--color"?: string };
type KeyEvt = { key: string; preventDefault(): void };
// useRef 는 항상 `T | null` 을 돌려주므로 목록 보관용 상자는 널이 아닌 타입으로 좁혀 쓴다
type Box<T> = { current: T };
type Member = { initials: string; name: string; role: string; tone: string };

const MEMBERS: Member[] = [
  { initials: "JH", name: "강주하", role: "팀 리드", tone: "a" },
  { initials: "ES", name: "노은설", role: "프로덕트 디자이너", tone: "b" },
  { initials: "GO", name: "임가온", role: "프론트엔드 개발자", tone: "c" },
];

const IconUsers = () => (
  <svg viewBox="0 0 256 256" width="15" height="15" aria-hidden="true"><g fill="currentColor"><path d="M168 144a40 40 0 1 1-40-40a40 40 0 0 1 40 40M64 56a32 32 0 1 0 32 32a32 32 0 0 0-32-32m128 0a32 32 0 1 0 32 32a32 32 0 0 0-32-32" opacity=".2"/><path d="M244.8 150.4a8 8 0 0 1-11.2-1.6A51.6 51.6 0 0 0 192 128a8 8 0 0 1 0-16a24 24 0 1 0-23.24-30a8 8 0 1 1-15.5-4A40 40 0 1 1 219 117.51a67.94 67.94 0 0 1 27.43 21.68a8 8 0 0 1-1.63 11.21M190.92 212a8 8 0 1 1-13.85 8a57 57 0 0 0-98.15 0a8 8 0 1 1-13.84-8a72.06 72.06 0 0 1 33.74-29.92a48 48 0 1 1 58.36 0A72.06 72.06 0 0 1 190.92 212M128 176a32 32 0 1 0-32-32a32 32 0 0 0 32 32m-56-56a8 8 0 0 0-8-8a24 24 0 1 1 23.24-30a8 8 0 1 0 15.5-4A40 40 0 1 0 37 117.51a67.94 67.94 0 0 0-27.4 21.68a8 8 0 1 0 12.8 9.61A51.6 51.6 0 0 1 64 128a8 8 0 0 0 8-8"/></g></svg>
);
const IconUserPlus = () => (
  <svg viewBox="0 0 256 256" width="13" height="13" aria-hidden="true"><g fill="currentColor"><path d="M168 100a60 60 0 1 1-60-60a60 60 0 0 1 60 60" opacity=".2"/><path d="M256 136a8 8 0 0 1-8 8h-16v16a8 8 0 0 1-16 0v-16h-16a8 8 0 0 1 0-16h16v-16a8 8 0 0 1 16 0v16h16a8 8 0 0 1 8 8m-57.87 58.85a8 8 0 0 1-12.26 10.3C165.75 181.19 138.09 168 108 168s-57.75 13.19-77.87 37.15a8 8 0 0 1-12.25-10.3c14.94-17.78 33.52-30.41 54.17-37.17a68 68 0 1 1 71.9 0c20.65 6.76 39.23 19.39 54.18 37.17M108 152a52 52 0 1 0-52-52a52.06 52.06 0 0 0 52 52"/></g></svg>
);
const IconCheck = () => (
  <svg viewBox="0 0 256 256" width="13" height="13" aria-hidden="true"><g fill="currentColor"><path d="M232 56v144a16 16 0 0 1-16 16H40a16 16 0 0 1-16-16V56a16 16 0 0 1 16-16h176a16 16 0 0 1 16 16" opacity=".2"/><path d="m205.66 85.66l-96 96a8 8 0 0 1-11.32 0l-40-40a8 8 0 0 1 11.32-11.32L104 164.69l90.34-90.35a8 8 0 0 1 11.32 11.32"/></g></svg>
);

export default function TeamGridCard({
  duration = 300,
  easing = "cubic-bezier(.2,.8,.2,1)",
  color = "#2f6df6",
}: TeamGridCardProps) {
  const [at, setAt] = useState(0);
  const [followed, setFollowed] = useState<boolean[]>([false, false, false]);
  const mainsRef = useRef<(HTMLButtonElement | null)[]>([null, null, null]) as Box<(HTMLButtonElement | null)[]>;
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  function onKey(e: KeyEvt, i: number): void {
    if (e.key !== "ArrowLeft" && e.key !== "ArrowRight") return;
    e.preventDefault();
    const next = (i + (e.key === "ArrowRight" ? 1 : MEMBERS.length - 1)) % MEMBERS.length;
    setAt(next);
    const el = mainsRef.current[next];
    if (el) el.focus({ preventScroll: true });
  }

  function toggleFollow(i: number): void {
    setFollowed(followed.map((v: boolean, k: number): boolean => (k === i ? !v : v)));
  }

  return (
    <div className={styles.tg} style={vars}>
      <p className={styles.head}><IconUsers />팀 멤버</p>
      <div className={styles.row}>
        {MEMBERS.map((m: Member, i: number) => {
          const open = i === at;
          const tone = m.tone === "a" ? styles.toneA : m.tone === "b" ? styles.toneB : styles.toneC;
          return (
            <div
              key={m.initials}
              className={open ? `${styles.tile} ${styles.isOpen}` : styles.tile}
              onPointerEnter={(): void => setAt(i)}
            >
              <button
                type="button"
                ref={(el: HTMLButtonElement | null): void => { mainsRef.current[i] = el; }}
                className={styles.main}
                aria-expanded={open}
                onClick={(): void => setAt(i)}
                onKeyDown={(e: KeyEvt): void => onKey(e, i)}
              >
                <span className={`${styles.avatar} ${tone}`} aria-hidden="true">{m.initials}</span>
                <span className={styles.name}>{m.name}</span>
                <span className={styles.role}>{m.role}</span>
              </button>
              <button
                type="button"
                className={followed[i] ? `${styles.follow} ${styles.isOn}` : styles.follow}
                aria-pressed={followed[i]}
                tabIndex={open ? undefined : -1}
                onClick={(): void => toggleFollow(i)}
              >
                <span className={styles.fOff}><IconUserPlus />팔로우</span>
                <span className={styles.fOn}><IconCheck />팔로잉</span>
              </button>
            </div>
          );
        })}
      </div>
    </div>
  );
}