05Address autocomplete dropdown

<main class="stage">
  <div class="ac is-demo">
    <div class="ac__map">
      <span class="ac__pin" id="ac-pin" aria-hidden="true"><svg viewBox="0 0 256 256" width="20" height="20"><g fill="currentColor"><path d="M128 24a80 80 0 0 0-80 80c0 72 80 128 80 128s80-56 80-128a80 80 0 0 0-80-80m0 112a32 32 0 1 1 32-32a32 32 0 0 1-32 32" opacity=".2"/><path d="M128 64a40 40 0 1 0 40 40a40 40 0 0 0-40-40m0 64a24 24 0 1 1 24-24a24 24 0 0 1-24 24m0-112a88.1 88.1 0 0 0-88 88c0 31.4 14.51 64.68 42 96.25a254.2 254.2 0 0 0 41.45 38.3a8 8 0 0 0 9.18 0a254.2 254.2 0 0 0 41.37-38.3c27.45-31.57 42-64.85 42-96.25a88.1 88.1 0 0 0-88-88m0 206c-16.53-13-72-60.75-72-118a72 72 0 0 1 144 0c0 57.23-55.47 105-72 118"/></g></svg></span>
    </div>
    <!-- 후보 목록은 입력칸 위로 열려 지도를 덮는다 — 절대배치라 뿌리 높이엔 안 잡히지만 뿌리 안쪽에 머문다 -->
    <ul class="ac__list" id="ac-list" role="listbox" aria-label="Address suggestions">
      <li class="ac__opt" id="ac-o0" role="option" aria-selected="false" data-x="88%" data-y="30%"><svg viewBox="0 0 256 256" width="13" height="13" aria-hidden="true"><g fill="currentColor"><path d="M128 24a80 80 0 0 0-80 80c0 72 80 128 80 128s80-56 80-128a80 80 0 0 0-80-80m0 112a32 32 0 1 1 32-32a32 32 0 0 1-32 32" opacity=".2"/><path d="M128 64a40 40 0 1 0 40 40a40 40 0 0 0-40-40m0 64a24 24 0 1 1 24-24a24 24 0 0 1-24 24m0-112a88.1 88.1 0 0 0-88 88c0 31.4 14.51 64.68 42 96.25a254.2 254.2 0 0 0 41.45 38.3a8 8 0 0 0 9.18 0a254.2 254.2 0 0 0 41.37-38.3c27.45-31.57 42-64.85 42-96.25a88.1 88.1 0 0 0-88-88m0 206c-16.53-13-72-60.75-72-118a72 72 0 0 1 144 0c0 57.23-55.47 105-72 118"/></g></svg><span>Teheran-ro 152</span></li>
      <li class="ac__opt" id="ac-o1" role="option" aria-selected="false" data-x="74%" data-y="58%"><svg viewBox="0 0 256 256" width="13" height="13" aria-hidden="true"><g fill="currentColor"><path d="M128 24a80 80 0 0 0-80 80c0 72 80 128 80 128s80-56 80-128a80 80 0 0 0-80-80m0 112a32 32 0 1 1 32-32a32 32 0 0 1-32 32" opacity=".2"/><path d="M128 64a40 40 0 1 0 40 40a40 40 0 0 0-40-40m0 64a24 24 0 1 1 24-24a24 24 0 0 1-24 24m0-112a88.1 88.1 0 0 0-88 88c0 31.4 14.51 64.68 42 96.25a254.2 254.2 0 0 0 41.45 38.3a8 8 0 0 0 9.18 0a254.2 254.2 0 0 0 41.37-38.3c27.45-31.57 42-64.85 42-96.25a88.1 88.1 0 0 0-88-88m0 206c-16.53-13-72-60.75-72-118a72 72 0 0 1 144 0c0 57.23-55.47 105-72 118"/></g></svg><span>Teheran-ro 427</span></li>
      <li class="ac__opt" id="ac-o2" role="option" aria-selected="false" data-x="78%" data-y="72%"><svg viewBox="0 0 256 256" width="13" height="13" aria-hidden="true"><g fill="currentColor"><path d="M128 24a80 80 0 0 0-80 80c0 72 80 128 80 128s80-56 80-128a80 80 0 0 0-80-80m0 112a32 32 0 1 1 32-32a32 32 0 0 1-32 32" opacity=".2"/><path d="M128 64a40 40 0 1 0 40 40a40 40 0 0 0-40-40m0 64a24 24 0 1 1 24-24a24 24 0 0 1-24 24m0-112a88.1 88.1 0 0 0-88 88c0 31.4 14.51 64.68 42 96.25a254.2 254.2 0 0 0 41.45 38.3a8 8 0 0 0 9.18 0a254.2 254.2 0 0 0 41.37-38.3c27.45-31.57 42-64.85 42-96.25a88.1 88.1 0 0 0-88-88m0 206c-16.53-13-72-60.75-72-118a72 72 0 0 1 144 0c0 57.23-55.47 105-72 118"/></g></svg><span>Teheran-ro-gil 21</span></li>
      <li class="ac__opt" id="ac-o3" role="option" aria-selected="false" data-x="92%" data-y="46%"><svg viewBox="0 0 256 256" width="13" height="13" aria-hidden="true"><g fill="currentColor"><path d="M128 24a80 80 0 0 0-80 80c0 72 80 128 80 128s80-56 80-128a80 80 0 0 0-80-80m0 112a32 32 0 1 1 32-32a32 32 0 0 1-32 32" opacity=".2"/><path d="M128 64a40 40 0 1 0 40 40a40 40 0 0 0-40-40m0 64a24 24 0 1 1 24-24a24 24 0 0 1-24 24m0-112a88.1 88.1 0 0 0-88 88c0 31.4 14.51 64.68 42 96.25a254.2 254.2 0 0 0 41.45 38.3a8 8 0 0 0 9.18 0a254.2 254.2 0 0 0 41.37-38.3c27.45-31.57 42-64.85 42-96.25a88.1 88.1 0 0 0-88-88m0 206c-16.53-13-72-60.75-72-118a72 72 0 0 1 144 0c0 57.23-55.47 105-72 118"/></g></svg><span>Teheran-ro 87-gil 36</span></li>
    </ul>
    <div class="ac__field">
      <span class="ac__ico" aria-hidden="true"><svg viewBox="0 0 256 256" width="14" height="14"><g fill="currentColor"><path d="M192 112a80 80 0 1 1-80-80a80 80 0 0 1 80 80" opacity=".2"/><path d="m229.66 218.34l-50.06-50.06a88.21 88.21 0 1 0-11.32 11.31l50.06 50.07a8 8 0 0 0 11.32-11.32M40 112a72 72 0 1 1 72 72a72.08 72.08 0 0 1-72-72"/></g></svg></span>
      <input class="ac__input" id="ac-input" type="text" role="combobox" aria-expanded="false" aria-controls="ac-list" aria-autocomplete="list" autocomplete="off" placeholder="Search an address">
      <span class="ac__ghost" aria-hidden="true">Teheran-ro</span>
    </div>
  </div>
</main>

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

$duration: $dur-quick;
$easing: $ease-pop;
$color: $subject-blue;

@include stage($stage-ink);

// 가짜 지도 캔버스 — 9개 데모가 같은 색으로 한 가족을 이룬다
$map-land:  #efe9dc;
$map-road:  #fffdf7;
$map-block: #e2dac9;
$map-park:  #c9e0bd;
$map-water: #bcd9ea;

.ac {
  position: relative;
  box-sizing: border-box;
  width: min(320px, 88vw);
  display: flex;
  flex-direction: column;
  gap: $sp-2;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  // 목록은 입력칸 위(지도 쪽)로 열린다 — 뿌리 높이를 넘지 않으니 따로 비워 둘 아래 여백이 없다
  padding-bottom: 0;
}

// ── 지도 ─────────────────────────────────────────────
.ac__map {
  position: relative;
  overflow: hidden;
  border-radius: $r-card;
  width: 100%;
  aspect-ratio: 12 / 5;
  background:
    repeating-linear-gradient(90deg, $map-road 0 7px, transparent 7px 32px),
    repeating-linear-gradient(0deg, $map-road 0 6px, transparent 6px 24px),
    radial-gradient(circle at 82% 78%, $map-park 0 26px, transparent 26px),
    linear-gradient(-72deg, transparent 0 74%, $map-water 74% 86%, transparent 86%),
    $map-land;
}
.ac__map::before,
.ac__map::after {
  content: "";
  position: absolute;
  z-index: 0;
  background: $map-block;
}
.ac__map::before { left: 12%; top: 16%; width: 14%; height: 32%; }
.ac__map::after  { left: 46%; top: 62%; width: 17%; height: 26%; }

// 핀은 지도 오른쪽 띠에 산다 — 목록이 왼쪽 2/3 을 덮어도 핀이 옮겨가는 게 보여야 한다
.ac__pin {
  position: absolute;
  z-index: 2;
  left: 82%; top: 38%;
  display: block;
  color: $color;
  transform: translate(-50%, -100%);
  transition: left $dur-base $easing, top $dur-base $easing;
}

// ── 후보 목록 (입력칸 바로 위로 슬라이드해 올라온다) ────────
.ac__list {
  position: absolute;
  z-index: 3;
  left: 0; right: 34%; bottom: 36px;
  box-sizing: border-box;
  margin: 0;
  padding: $sp-1;
  list-style: none;
  background: $subject-cream;
  border-radius: $r-card;
  box-shadow: $shadow-raised;
  transform-origin: bottom center; // 규칙8: 입력칸 위변에서 펼침
  transform: translateY(10px) scale(.96);
  opacity: 0;
  pointer-events: none;
  transition: transform $duration $easing, opacity $duration $easing;
}
.ac.is-open .ac__list {
  transform: translateY(0) scale(1);
  opacity: 1;
  pointer-events: auto;
}
.ac__opt {
  position: relative;
  box-sizing: border-box;
  height: 24px;
  display: flex;
  align-items: center;
  gap: $sp-2;
  padding: 0 $sp-2;
  border-radius: $r-sm;
  color: $subject-ink;
  font-size: 11px; line-height: 14px; font-weight: 600;
  cursor: pointer;
}
// 하이라이트 판(::before)이 절대배치라 글자보다 나중에 그려진다 — 글자도 positioned 로 올려 덮이지 않게 한다
.ac__opt > svg { position: relative; z-index: 1; flex: 0 0 auto; color: $color; }
.ac__opt > span { position: relative; z-index: 1; }
.ac__opt::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: $r-sm;
  background: rgba(47, 109, 246, .14);
  opacity: 0;
}
.ac__opt.is-active::before { opacity: 1; }

// ── 검색 입력칸 ───────────────────────────────────────
.ac__field {
  position: relative;
  height: 28px;
  flex: 0 0 auto;
}
.ac__ico {
  position: absolute;
  left: 11px; top: 50%;
  display: inline-flex;
  color: rgba(255, 255, 255, .5);
  transform: translateY(-50%);
  pointer-events: none;
}
.ac__input {
  box-sizing: border-box;
  width: 100%; height: 100%;
  padding: 0 $sp-3 0 $sp-8;
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: $r-control;
  background: rgba(255, 255, 255, .07);
  color: $subject-cream;
  font-family: inherit;
  font-size: 12px; line-height: 26px; font-weight: 600;
}
.ac__input::placeholder { color: rgba(255, 255, 255, .38); }
.ac__input:focus-visible { outline: 2px solid $color; outline-offset: 2px; }
.ac.is-open .ac__input { border-color: $color; }

// 자동 루프 때만 보이는 "타이핑" 유령 글자. 진짜 placeholder 와 겹치지 않게 투명으로 지운다
.ac.is-demo .ac__input::placeholder { color: transparent; }
.ac__ghost {
  position: absolute;
  left: 33px; top: 0;
  color: $subject-cream;
  font-size: 12px; line-height: 28px; font-weight: 600;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
}

// ── 자동 루프 (2s) ────────────────────────────────────
// 0~30% 한 자씩 타이핑 → 32~40% 목록 열림 → 40·50·58% 하이라이트 이동 → 66% 선택(핀 이동)
// → 80~90% 지우기 · 82~90% 목록 닫힘 · 84~90% 핀 복귀. 90% 에 처음 상태로 돌아온다.
.ac.is-demo .ac__ghost {
  opacity: 1;
  animation-name: ac-type;
  animation-duration: $dur-loop;
  animation-timing-function: steps(4, end);
  animation-iteration-count: infinite;
}
.ac.is-demo .ac__list {
  transition: none;
  animation-name: ac-list;
  animation-duration: $dur-loop;
  animation-timing-function: $easing;
  animation-iteration-count: infinite;
}
.ac.is-demo .ac__opt::before {
  animation-duration: $dur-loop;
  animation-timing-function: steps(1, end);
  animation-iteration-count: infinite;
}
.ac.is-demo .ac__opt:nth-child(1)::before { animation-name: ac-hl-0; }
.ac.is-demo .ac__opt:nth-child(2)::before { animation-name: ac-hl-1; }
.ac.is-demo .ac__opt:nth-child(3)::before { animation-name: ac-hl-2; }
.ac.is-demo .ac__pin {
  transition: none;
  animation-name: ac-pin;
  animation-duration: $dur-loop;
  animation-timing-function: $ease-spring;
  animation-iteration-count: infinite;
}

@keyframes ac-type {
  0%   { clip-path: inset(0 100% 0 0); }
  30%  { clip-path: inset(0 0 0 0); }
  80%  { clip-path: inset(0 0 0 0); }
  90%  { clip-path: inset(0 100% 0 0); }
  100% { clip-path: inset(0 100% 0 0); }
}
@keyframes ac-list {
  0%   { opacity: 0; transform: translateY(10px) scale(.96); }
  32%  { opacity: 0; transform: translateY(10px) scale(.96); }
  40%  { opacity: 1; transform: translateY(0) scale(1); }
  82%  { opacity: 1; transform: translateY(0) scale(1); }
  90%  { opacity: 0; transform: translateY(10px) scale(.96); }
  100% { opacity: 0; transform: translateY(10px) scale(.96); }
}
@keyframes ac-hl-0 { 0% { opacity: 0; } 40% { opacity: 1; } 50% { opacity: 0; } 100% { opacity: 0; } }
@keyframes ac-hl-1 { 0% { opacity: 0; } 50% { opacity: 1; } 58% { opacity: 0; } 100% { opacity: 0; } }
@keyframes ac-hl-2 { 0% { opacity: 0; } 58% { opacity: 1; } 90% { opacity: 0; } 100% { opacity: 0; } }
@keyframes ac-pin {
  0%   { left: 82%; top: 38%; }
  66%  { left: 82%; top: 38%; }
  74%  { left: 78%; top: 72%; }
  84%  { left: 78%; top: 72%; }
  90%  { left: 82%; top: 38%; }
  100% { left: 82%; top: 38%; }
}

// 320×200 — 무대 여백을 뺀 174px 안에 들어가도록 간격을 내린다(올리지 않는다)
@media (max-width: 360px) {
  .ac { gap: $sp-1; }
  .ac__list { bottom: 32px; }
}

@media (prefers-reduced-motion: reduce) {
  .ac.is-demo .ac__ghost,
  .ac.is-demo .ac__list,
  .ac.is-demo .ac__opt::before,
  .ac.is-demo .ac__pin { animation: none !important; }
  .ac.is-demo .ac__ghost { opacity: 0; }
  .ac__list, .ac__pin, .ac__input { 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);
}

.ac {
  position: relative;
  box-sizing: border-box;
  width: min(320px, 88vw);
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding-bottom: 0;
}

.ac__map {
  position: relative;
  overflow: hidden;
  border-radius: 16px;
  width: 100%;
  aspect-ratio: 12/5;
  background: repeating-linear-gradient(90deg, #fffdf7 0 7px, transparent 7px 32px), repeating-linear-gradient(0deg, #fffdf7 0 6px, transparent 6px 24px), radial-gradient(circle at 82% 78%, #c9e0bd 0 26px, transparent 26px), linear-gradient(-72deg, transparent 0 74%, #bcd9ea 74% 86%, transparent 86%), #efe9dc;
}

.ac__map::before,
.ac__map::after {
  content: "";
  position: absolute;
  z-index: 0;
  background: #e2dac9;
}

.ac__map::before {
  left: 12%;
  top: 16%;
  width: 14%;
  height: 32%;
}

.ac__map::after {
  left: 46%;
  top: 62%;
  width: 17%;
  height: 26%;
}

.ac__pin {
  position: absolute;
  z-index: 2;
  left: 82%;
  top: 38%;
  display: block;
  color: #2f6df6;
  transform: translate(-50%, -100%);
  transition: left 300ms cubic-bezier(0.2, 1.4, 0.4, 1), top 300ms cubic-bezier(0.2, 1.4, 0.4, 1);
}

.ac__list {
  position: absolute;
  z-index: 3;
  left: 0;
  right: 34%;
  bottom: 36px;
  box-sizing: border-box;
  margin: 0;
  padding: 4px;
  list-style: none;
  background: #fff7e6;
  border-radius: 16px;
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
  transform-origin: bottom center;
  transform: translateY(10px) scale(0.96);
  opacity: 0;
  pointer-events: none;
  transition: transform 220ms cubic-bezier(0.2, 1.4, 0.4, 1), opacity 220ms cubic-bezier(0.2, 1.4, 0.4, 1);
}

.ac.is-open .ac__list {
  transform: translateY(0) scale(1);
  opacity: 1;
  pointer-events: auto;
}

.ac__opt {
  position: relative;
  box-sizing: border-box;
  height: 24px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 8px;
  border-radius: 8px;
  color: #17141a;
  font-size: 11px;
  line-height: 14px;
  font-weight: 600;
  cursor: pointer;
}

.ac__opt > svg {
  position: relative;
  z-index: 1;
  flex: 0 0 auto;
  color: #2f6df6;
}

.ac__opt > span {
  position: relative;
  z-index: 1;
}

.ac__opt::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 8px;
  background: rgba(47, 109, 246, 0.14);
  opacity: 0;
}

.ac__opt.is-active::before {
  opacity: 1;
}

.ac__field {
  position: relative;
  height: 28px;
  flex: 0 0 auto;
}

.ac__ico {
  position: absolute;
  left: 11px;
  top: 50%;
  display: inline-flex;
  color: rgba(255, 255, 255, 0.5);
  transform: translateY(-50%);
  pointer-events: none;
}

.ac__input {
  box-sizing: border-box;
  width: 100%;
  height: 100%;
  padding: 0 12px 0 32px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.07);
  color: #fff7e6;
  font-family: inherit;
  font-size: 12px;
  line-height: 26px;
  font-weight: 600;
}

.ac__input::placeholder {
  color: rgba(255, 255, 255, 0.38);
}

.ac__input:focus-visible {
  outline: 2px solid #2f6df6;
  outline-offset: 2px;
}

.ac.is-open .ac__input {
  border-color: #2f6df6;
}

.ac.is-demo .ac__input::placeholder {
  color: transparent;
}

.ac__ghost {
  position: absolute;
  left: 33px;
  top: 0;
  color: #fff7e6;
  font-size: 12px;
  line-height: 28px;
  font-weight: 600;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
}

.ac.is-demo .ac__ghost {
  opacity: 1;
  animation-name: ac-type;
  animation-duration: 2s;
  animation-timing-function: steps(4, end);
  animation-iteration-count: infinite;
}

.ac.is-demo .ac__list {
  transition: none;
  animation-name: ac-list;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 1.4, 0.4, 1);
  animation-iteration-count: infinite;
}

.ac.is-demo .ac__opt::before {
  animation-duration: 2s;
  animation-timing-function: steps(1, end);
  animation-iteration-count: infinite;
}

.ac.is-demo .ac__opt:nth-child(1)::before {
  animation-name: ac-hl-0;
}

.ac.is-demo .ac__opt:nth-child(2)::before {
  animation-name: ac-hl-1;
}

.ac.is-demo .ac__opt:nth-child(3)::before {
  animation-name: ac-hl-2;
}

.ac.is-demo .ac__pin {
  transition: none;
  animation-name: ac-pin;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-iteration-count: infinite;
}

@keyframes ac-type {
  0% {
    clip-path: inset(0 100% 0 0);
  }
  30% {
    clip-path: inset(0 0 0 0);
  }
  80% {
    clip-path: inset(0 0 0 0);
  }
  90% {
    clip-path: inset(0 100% 0 0);
  }
  100% {
    clip-path: inset(0 100% 0 0);
  }
}
@keyframes ac-list {
  0% {
    opacity: 0;
    transform: translateY(10px) scale(0.96);
  }
  32% {
    opacity: 0;
    transform: translateY(10px) scale(0.96);
  }
  40% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  82% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  90% {
    opacity: 0;
    transform: translateY(10px) scale(0.96);
  }
  100% {
    opacity: 0;
    transform: translateY(10px) scale(0.96);
  }
}
@keyframes ac-hl-0 {
  0% {
    opacity: 0;
  }
  40% {
    opacity: 1;
  }
  50% {
    opacity: 0;
  }
  100% {
    opacity: 0;
  }
}
@keyframes ac-hl-1 {
  0% {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  58% {
    opacity: 0;
  }
  100% {
    opacity: 0;
  }
}
@keyframes ac-hl-2 {
  0% {
    opacity: 0;
  }
  58% {
    opacity: 1;
  }
  90% {
    opacity: 0;
  }
  100% {
    opacity: 0;
  }
}
@keyframes ac-pin {
  0% {
    left: 82%;
    top: 38%;
  }
  66% {
    left: 82%;
    top: 38%;
  }
  74% {
    left: 78%;
    top: 72%;
  }
  84% {
    left: 78%;
    top: 72%;
  }
  90% {
    left: 82%;
    top: 38%;
  }
  100% {
    left: 82%;
    top: 38%;
  }
}
@media (max-width: 360px) {
  .ac {
    gap: 4px;
  }
  .ac__list {
    bottom: 32px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .ac.is-demo .ac__ghost,
  .ac.is-demo .ac__list,
  .ac.is-demo .ac__opt::before,
  .ac.is-demo .ac__pin {
    animation: none !important;
  }
  .ac.is-demo .ac__ghost {
    opacity: 0;
  }
  .ac__list, .ac__pin, .ac__input {
    transition: none;
  }
}

// 실제 동작: 글자를 치면 후보가 열리고, ↑↓ 로 옮기고, Enter(또는 클릭)로 고르면 지도 핀이 그 좌표로 간다.
var acRoot = document.querySelector('.ac');
var acInput = document.getElementById('ac-input');
var acList = document.getElementById('ac-list');
var acPin = document.getElementById('ac-pin');
var acOpts = [].slice.call(acList.querySelectorAll('.ac__opt'));
var acActive = 0;
function acPaint() {
  acOpts.forEach(function (o, i) { o.classList.toggle('is-active', i === acActive); });
  acInput.setAttribute('aria-activedescendant', acOpts[acActive].id);
}
function acOpen(on) {
  acRoot.classList.remove('is-demo');  // 사람이 치면 자동 루프를 멈춘다
  acRoot.classList.toggle('is-open', on);
  acInput.setAttribute('aria-expanded', String(on));
  if (on) acPaint(); else acInput.removeAttribute('aria-activedescendant');
}
function acPick(i) {
  var o = acOpts[i];
  acOpts.forEach(function (x, k) { x.setAttribute('aria-selected', String(k === i)); });
  acInput.value = o.lastElementChild.textContent;
  acPin.style.left = o.getAttribute('data-x');
  acPin.style.top = o.getAttribute('data-y');
  acOpen(false);
  acInput.focus({ preventScroll: true });
}
acInput.addEventListener('input', function () { acOpen(acInput.value.length > 0); });
acInput.addEventListener('focus', function () { acOpen(acInput.value.length > 0); });
acInput.addEventListener('keydown', function (e) {
  if (e.key === 'ArrowDown') { acActive = Math.min(acActive + 1, acOpts.length - 1); acOpen(true); e.preventDefault(); }
  else if (e.key === 'ArrowUp') { acActive = Math.max(acActive - 1, 0); acOpen(true); e.preventDefault(); }
  else if (e.key === 'Enter') { acPick(acActive); e.preventDefault(); }
  else if (e.key === 'Escape') { acOpen(false); }
});
acOpts.forEach(function (o, i) {
  o.addEventListener('mousemove', function () { acActive = i; acPaint(); });
  o.addEventListener('click', function () { acPick(i); });
});

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

export type AddressItem = {
  text: string;
  /** 지도 안 좌표 (예: "58%") */
  x: string;
  y: string;
};

export type AddressAutoProps = {
  placeholder?: string;
  listLabel?: string;
  items?: AddressItem[];
  duration?: number;
  easing?: string;
  color?: string;
};

type Vars = CSSProperties & { "--duration"?: string; "--easing"?: string; "--color"?: string };
type KeyEvt = { key: string; preventDefault: () => void };
type ChangeEvt = { target: { value: string } };

const DEFAULT_ITEMS: AddressItem[] = [
  { text: "Teheran-ro 152", x: "88%", y: "30%" },
  { text: "Teheran-ro 427", x: "74%", y: "58%" },
  { text: "Teheran-ro-gil 21", x: "78%", y: "72%" },
  { text: "Teheran-ro 87-gil 36", x: "92%", y: "46%" },
];

function PinIcon({ size }: { size: number }) {
  return (
    <svg viewBox="0 0 256 256" width={size} height={size} aria-hidden="true">
      <g fill="currentColor">
        <path d="M128 24a80 80 0 0 0-80 80c0 72 80 128 80 128s80-56 80-128a80 80 0 0 0-80-80m0 112a32 32 0 1 1 32-32a32 32 0 0 1-32 32" opacity=".2" />
        <path d="M128 64a40 40 0 1 0 40 40a40 40 0 0 0-40-40m0 64a24 24 0 1 1 24-24a24 24 0 0 1-24 24m0-112a88.1 88.1 0 0 0-88 88c0 31.4 14.51 64.68 42 96.25a254.2 254.2 0 0 0 41.45 38.3a8 8 0 0 0 9.18 0a254.2 254.2 0 0 0 41.37-38.3c27.45-31.57 42-64.85 42-96.25a88.1 88.1 0 0 0-88-88m0 206c-16.53-13-72-60.75-72-118a72 72 0 0 1 144 0c0 57.23-55.47 105-72 118" />
      </g>
    </svg>
  );
}

export default function AddressAuto({
  placeholder = "Search an address",
  listLabel = "Address suggestions",
  items = DEFAULT_ITEMS,
  duration = 220,
  easing = "cubic-bezier(.2,1.4,.4,1)",
  color = "#2f6df6",
}: AddressAutoProps) {
  const [query, setQuery] = useState("");
  const [open, setOpen] = useState(false);
  const [active, setActive] = useState(0);
  const [picked, setPicked] = useState(-1);
  const [spot, setSpot] = useState({ left: "82%", top: "38%" });
  const rootRef = useRef<HTMLDivElement>(null);
  const inputRef = useRef<HTMLInputElement>(null);
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  useEffect(() => {
    function onDocClick(e: MouseEvent) {
      if (rootRef.current && !rootRef.current.contains(e.target as Node)) setOpen(false);
    }
    document.addEventListener("click", onDocClick);
    return () => document.removeEventListener("click", onDocClick);
  }, []);

  function pick(i: number) {
    const it = items[i];
    setPicked(i);
    setQuery(it.text);
    setSpot({ left: it.x, top: it.y });
    setOpen(false);
    inputRef.current?.focus({ preventScroll: true });
  }

  return (
    <div className={`${styles.ac} ${open ? styles.isOpen : ""}`} style={vars} ref={rootRef}>
      <div className={styles.map}>
        <span className={styles.pin} style={spot} aria-hidden="true"><PinIcon size={20} /></span>
      </div>
      <ul className={styles.list} id="ac-list" role="listbox" aria-label={listLabel}>
        {items.map((it, i) => (
          <li
            key={it.text}
            id={`ac-o${i}`}
            className={`${styles.opt} ${i === active ? styles.isActive : ""}`}
            role="option"
            aria-selected={i === picked}
            onMouseMove={() => setActive(i)}
            onClick={() => pick(i)}
          >
            <PinIcon size={13} />
            <span>{it.text}</span>
          </li>
        ))}
      </ul>
      <div className={styles.field}>
        <span className={styles.ico} aria-hidden="true">
          <svg viewBox="0 0 256 256" width="14" height="14">
            <g fill="currentColor">
              <path d="M192 112a80 80 0 1 1-80-80a80 80 0 0 1 80 80" opacity=".2" />
              <path d="m229.66 218.34l-50.06-50.06a88.21 88.21 0 1 0-11.32 11.31l50.06 50.07a8 8 0 0 0 11.32-11.32M40 112a72 72 0 1 1 72 72a72.08 72.08 0 0 1-72-72" />
            </g>
          </svg>
        </span>
        <input
          ref={inputRef}
          className={styles.input}
          type="text"
          role="combobox"
          autoComplete="off"
          placeholder={placeholder}
          value={query}
          aria-expanded={open}
          aria-controls="ac-list"
          aria-autocomplete="list"
          aria-activedescendant={open ? `ac-o${active}` : undefined}
          onChange={(e: ChangeEvt) => { setQuery(e.target.value); setOpen(e.target.value.length > 0); }}
          onFocus={() => setOpen(query.length > 0)}
          onKeyDown={(e: KeyEvt) => {
            if (e.key === "ArrowDown") { setActive((a) => Math.min(a + 1, items.length - 1)); setOpen(true); e.preventDefault(); }
            else if (e.key === "ArrowUp") { setActive((a) => Math.max(a - 1, 0)); setOpen(true); e.preventDefault(); }
            else if (e.key === "Enter") { pick(active); e.preventDefault(); }
            else if (e.key === "Escape") { setOpen(false); }
          }}
        />
      </div>
    </div>
  );
}