02로고 조각 결합

<main class="stage">
<div class="la is-demo" id="la">
  <div class="la__mark" aria-hidden="true">
    <i class="la__q la__q--tl"></i>
    <i class="la__q la__q--tr"></i>
    <i class="la__q la__q--br"></i>
    <i class="la__q la__q--bl"></i>
  </div>
  <p class="la__word">GODRICH</p>
  <p class="la__tag">새 브랜드의 첫 인사</p>
  <button class="la__go" type="button">둘러보기</button>
  <button class="la__skip" id="la-skip" type="button">건너뛰기</button>
  <p class="la__live" id="la-live" aria-live="polite"></p>
</div>
</main>

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

// 로고 조각 결합 — 사방에서 날아온 조각 네 개가 animation-delay 를 한 칸씩 달리해 가운데로 모이는 인트로.
// 조각은 같은 크기의 원을 clip-path 로 4분면으로 자른 것이다. 기본 transform 은 "맞춰진 자리"라
// 건너뛰기·Esc·재방문·reduced-motion 모두 애니메이션을 끄는 것만으로 완성 로고가 된다.
// 회전축 transform-origin 은 각 조각(원)의 중심 = 로고의 중심. 조각이 붙는 지점이라 원점을 옮기지 않는다.
// 대비 실측(run/016/_probe/a1_대비.py): 워드마크 $subject-ink on $stage-yellow 12.63:1 ·
// 태그라인 rgba($subject-ink,.72) 합성 6.08:1 · CTA $subject-cream on $subject-blue-deep 5.98:1 (조각은 글자가 없는 면)

$duration: $dur-enter;   // 정적(실사용) 재생 시간 — 변형1: $dur-base
$easing: $ease-spring;   // 변형2: $ease-pop
$color: $subject-blue;   // 오른쪽 위 조각 색 — 변형3: $stage-orange

@include stage($stage-yellow);

.la {
  position: fixed; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: $sp-2; text-align: center;
}

// ── 로고 마크. 4분면 조각 네 개(약 2px 틈)
.la__mark { position: relative; width: 96px; height: 96px; }
.la__q {
  position: absolute; inset: 0; border-radius: 50%;
  transform-origin: 50% 50%;   // 회전축 = 원의 중심 = 조각이 로고에 붙는 지점
}
.la__q--tl { background: $subject-ink;    clip-path: inset(0 51% 51% 0); }
.la__q--tr { background: $color;          clip-path: inset(0 0 51% 51%); }
.la__q--br { background: $chart-3;        clip-path: inset(51% 0 0 51%); }
.la__q--bl { background: $stage-orange;   clip-path: inset(51% 51% 0 0); }

.la__word {
  margin: $sp-2 0 0; color: $subject-ink;
  font-weight: 800; font-size: 22px; line-height: 1.2;
  letter-spacing: .3em; text-indent: .3em;
}
.la__tag {
  margin: 0; color: rgba($subject-ink, .72);
  font-weight: 500; font-size: 13px; line-height: 1.5;
}
.la__go {
  margin-top: $sp-2; padding: $sp-2 $sp-5; border: 0; border-radius: $r-pill;
  background: $subject-blue-deep; color: $subject-cream;
  font-family: inherit; font-weight: 700; font-size: 13px; line-height: 1.4; cursor: pointer;
}

// ── 건너뛰기 (무대 우상단)
.la__skip {
  position: absolute; top: $sp-3; right: $sp-3; z-index: 4;
  padding: $sp-1 $sp-3; border: 1px solid rgba($subject-ink, .32); border-radius: $r-pill;
  background: rgba($subject-ink, .08); color: $subject-ink;
  font-family: inherit; font-weight: 600; font-size: 12px; line-height: 1.4; cursor: pointer;
}

.la__live {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip-path: inset(50%); white-space: nowrap;
}

// ── 정적(실사용): 조각이 한 번씩 지연되어 날아와 앉는다. 낱개 속성 + fill-mode: both 로
// 지연 구간에는 0%(화면 밖)가 채워진다
.la__q--tl {
  animation-name: laInTl; animation-duration: $duration; animation-timing-function: $easing;
  animation-delay: 0s; animation-fill-mode: both;
}
.la__q--tr {
  animation-name: laInTr; animation-duration: $duration; animation-timing-function: $easing;
  animation-delay: .08s; animation-fill-mode: both;
}
.la__q--br {
  animation-name: laInBr; animation-duration: $duration; animation-timing-function: $easing;
  animation-delay: .16s; animation-fill-mode: both;
}
.la__q--bl {
  animation-name: laInBl; animation-duration: $duration; animation-timing-function: $easing;
  animation-delay: .24s; animation-fill-mode: both;
}
.la__word {
  animation-name: laRiseOnce; animation-duration: $duration; animation-timing-function: $easing;
  animation-delay: .44s; animation-fill-mode: both;
}
.la__tag {
  animation-name: laRiseOnce; animation-duration: $duration; animation-timing-function: $easing;
  animation-delay: .54s; animation-fill-mode: both;
}
.la__go {
  animation-name: laRiseOnce; animation-duration: $duration; animation-timing-function: $easing;
  animation-delay: .64s; animation-fill-mode: both;
}
@keyframes laInTl { from { transform: translate(-150px, 0) rotate(-10deg); } to { transform: none; } }
@keyframes laInTr { from { transform: translate(0, -150px) rotate(8deg); } to { transform: none; } }
@keyframes laInBr { from { transform: translate(150px, 0) rotate(10deg); } to { transform: none; } }
@keyframes laInBl { from { transform: translate(0, 150px) rotate(-8deg); } to { transform: none; } }
@keyframes laRiseOnce { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }

// ── 격자 미리보기 루프(2초). 도착 0~26%(조각마다 4% 시차) · 워드마크 30~42% ·
// 흩어짐 64~86%(늦게 온 조각이 먼저 떠난다) — 86% 안에 끝나 마지막 장은 frame 0 와 같다.
// 흩어짐 구간은 linear — 컷으로 끊으면 그 한 프레임이 최대 변화가 되어 poster 가 빈 노랑이 된다
.la.is-demo .la__q--tl {
  animation-name: laTlLoop; animation-duration: $dur-loop; animation-timing-function: $easing;
  animation-iteration-count: infinite; animation-fill-mode: backwards; animation-delay: 0s;
}
.la.is-demo .la__q--tr {
  animation-name: laTrLoop; animation-duration: $dur-loop; animation-timing-function: $easing;
  animation-iteration-count: infinite; animation-fill-mode: backwards; animation-delay: 0s;
}
.la.is-demo .la__q--br {
  animation-name: laBrLoop; animation-duration: $dur-loop; animation-timing-function: $easing;
  animation-iteration-count: infinite; animation-fill-mode: backwards; animation-delay: 0s;
}
.la.is-demo .la__q--bl {
  animation-name: laBlLoop; animation-duration: $dur-loop; animation-timing-function: $easing;
  animation-iteration-count: infinite; animation-fill-mode: backwards; animation-delay: 0s;
}
.la.is-demo .la__word {
  animation-name: laWordLoop; animation-duration: $dur-loop; animation-timing-function: $easing;
  animation-iteration-count: infinite; animation-fill-mode: backwards; animation-delay: 0s;
}
.la.is-demo .la__tag {
  animation-name: laTagLoop; animation-duration: $dur-loop; animation-timing-function: $easing;
  animation-iteration-count: infinite; animation-fill-mode: backwards; animation-delay: 0s;
}
.la.is-demo .la__go {
  animation-name: laGoLoop; animation-duration: $dur-loop; animation-timing-function: $easing;
  animation-iteration-count: infinite; animation-fill-mode: backwards; animation-delay: 0s;
}
@keyframes laTlLoop {
  0% { transform: translate(-150px, 0) rotate(-10deg); }
  14%, 76% { transform: none; animation-timing-function: linear; }
  86%, 100% { transform: translate(-150px, 0) rotate(-10deg); }
}
@keyframes laTrLoop {
  0%, 4% { transform: translate(0, -150px) rotate(8deg); }
  18%, 72% { transform: none; animation-timing-function: linear; }
  82%, 100% { transform: translate(0, -150px) rotate(8deg); }
}
@keyframes laBrLoop {
  0%, 8% { transform: translate(150px, 0) rotate(10deg); }
  22%, 68% { transform: none; animation-timing-function: linear; }
  78%, 100% { transform: translate(150px, 0) rotate(10deg); }
}
@keyframes laBlLoop {
  0%, 12% { transform: translate(0, 150px) rotate(-8deg); }
  26%, 64% { transform: none; animation-timing-function: linear; }
  74%, 100% { transform: translate(0, 150px) rotate(-8deg); }
}
@keyframes laWordLoop {
  0%, 30% { opacity: 0; transform: translateY(12px); }
  42%, 60% { opacity: 1; transform: none; }
  68%, 100% { opacity: 0; transform: translateY(12px); }
}
@keyframes laTagLoop {
  0%, 36% { opacity: 0; transform: translateY(10px); }
  48%, 60% { opacity: 1; transform: none; }
  68%, 100% { opacity: 0; transform: translateY(10px); }
}
@keyframes laGoLoop {
  0%, 42% { opacity: 0; transform: translateY(10px); }
  54%, 62% { opacity: 1; transform: none; }
  70%, 100% { opacity: 0; transform: translateY(10px); }
}

// 건너뛰기·Esc·재방문: 애니메이션을 끄면 기본 상태(완성 로고)가 드러난다
.la.is-done .la__q--tl, .la.is-done .la__q--tr, .la.is-done .la__q--br, .la.is-done .la__q--bl,
.la.is-done .la__word, .la.is-done .la__tag, .la.is-done .la__go { animation: none; }
.la.is-done .la__skip { display: none; }

// ── 좁은 화면: 마크와 글자를 줄여 무대(174px) 안에 들어온다
@media (max-width: 340px) {
  .la { gap: $sp-1; }
  .la__mark { width: 64px; height: 64px; }
  .la__word { font-size: 18px; }
  .la__tag { font-size: 12px; }
  .la__go { padding: $sp-1 $sp-4; font-size: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  // !important — .la.is-demo 계열(클래스 3개) 특이도에 지지 않으려면 필요하다
  .la .la__q--tl, .la .la__q--tr, .la .la__q--br, .la .la__q--bl,
  .la .la__word, .la .la__tag, .la .la__go { 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: #ffd23f;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.la {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-align: center;
}

.la__mark {
  position: relative;
  width: 96px;
  height: 96px;
}

.la__q {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  transform-origin: 50% 50%;
}

.la__q--tl {
  background: #17141a;
  clip-path: inset(0 51% 51% 0);
}

.la__q--tr {
  background: #2f6df6;
  clip-path: inset(0 0 51% 51%);
}

.la__q--br {
  background: #2b9d74;
  clip-path: inset(51% 0 0 51%);
}

.la__q--bl {
  background: #ff4d1f;
  clip-path: inset(51% 51% 0 0);
}

.la__word {
  margin: 8px 0 0;
  color: #17141a;
  font-weight: 800;
  font-size: 22px;
  line-height: 1.2;
  letter-spacing: 0.3em;
  text-indent: 0.3em;
}

.la__tag {
  margin: 0;
  color: rgba(23, 20, 26, 0.72);
  font-weight: 500;
  font-size: 13px;
  line-height: 1.5;
}

.la__go {
  margin-top: 8px;
  padding: 8px 20px;
  border: 0;
  border-radius: 999px;
  background: #0a4fe8;
  color: #fff7e6;
  font-family: inherit;
  font-weight: 700;
  font-size: 13px;
  line-height: 1.4;
  cursor: pointer;
}

.la__skip {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 4;
  padding: 4px 12px;
  border: 1px solid rgba(23, 20, 26, 0.32);
  border-radius: 999px;
  background: rgba(23, 20, 26, 0.08);
  color: #17141a;
  font-family: inherit;
  font-weight: 600;
  font-size: 12px;
  line-height: 1.4;
  cursor: pointer;
}

.la__live {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.la__q--tl {
  animation-name: laInTl;
  animation-duration: 600ms;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-delay: 0s;
  animation-fill-mode: both;
}

.la__q--tr {
  animation-name: laInTr;
  animation-duration: 600ms;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-delay: 0.08s;
  animation-fill-mode: both;
}

.la__q--br {
  animation-name: laInBr;
  animation-duration: 600ms;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-delay: 0.16s;
  animation-fill-mode: both;
}

.la__q--bl {
  animation-name: laInBl;
  animation-duration: 600ms;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-delay: 0.24s;
  animation-fill-mode: both;
}

.la__word {
  animation-name: laRiseOnce;
  animation-duration: 600ms;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-delay: 0.44s;
  animation-fill-mode: both;
}

.la__tag {
  animation-name: laRiseOnce;
  animation-duration: 600ms;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-delay: 0.54s;
  animation-fill-mode: both;
}

.la__go {
  animation-name: laRiseOnce;
  animation-duration: 600ms;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-delay: 0.64s;
  animation-fill-mode: both;
}

@keyframes laInTl {
  from {
    transform: translate(-150px, 0) rotate(-10deg);
  }
  to {
    transform: none;
  }
}
@keyframes laInTr {
  from {
    transform: translate(0, -150px) rotate(8deg);
  }
  to {
    transform: none;
  }
}
@keyframes laInBr {
  from {
    transform: translate(150px, 0) rotate(10deg);
  }
  to {
    transform: none;
  }
}
@keyframes laInBl {
  from {
    transform: translate(0, 150px) rotate(-8deg);
  }
  to {
    transform: none;
  }
}
@keyframes laRiseOnce {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}
.la.is-demo .la__q--tl {
  animation-name: laTlLoop;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-iteration-count: infinite;
  animation-fill-mode: backwards;
  animation-delay: 0s;
}

.la.is-demo .la__q--tr {
  animation-name: laTrLoop;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-iteration-count: infinite;
  animation-fill-mode: backwards;
  animation-delay: 0s;
}

.la.is-demo .la__q--br {
  animation-name: laBrLoop;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-iteration-count: infinite;
  animation-fill-mode: backwards;
  animation-delay: 0s;
}

.la.is-demo .la__q--bl {
  animation-name: laBlLoop;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-iteration-count: infinite;
  animation-fill-mode: backwards;
  animation-delay: 0s;
}

.la.is-demo .la__word {
  animation-name: laWordLoop;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-iteration-count: infinite;
  animation-fill-mode: backwards;
  animation-delay: 0s;
}

.la.is-demo .la__tag {
  animation-name: laTagLoop;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-iteration-count: infinite;
  animation-fill-mode: backwards;
  animation-delay: 0s;
}

.la.is-demo .la__go {
  animation-name: laGoLoop;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-iteration-count: infinite;
  animation-fill-mode: backwards;
  animation-delay: 0s;
}

@keyframes laTlLoop {
  0% {
    transform: translate(-150px, 0) rotate(-10deg);
  }
  14%, 76% {
    transform: none;
    animation-timing-function: linear;
  }
  86%, 100% {
    transform: translate(-150px, 0) rotate(-10deg);
  }
}
@keyframes laTrLoop {
  0%, 4% {
    transform: translate(0, -150px) rotate(8deg);
  }
  18%, 72% {
    transform: none;
    animation-timing-function: linear;
  }
  82%, 100% {
    transform: translate(0, -150px) rotate(8deg);
  }
}
@keyframes laBrLoop {
  0%, 8% {
    transform: translate(150px, 0) rotate(10deg);
  }
  22%, 68% {
    transform: none;
    animation-timing-function: linear;
  }
  78%, 100% {
    transform: translate(150px, 0) rotate(10deg);
  }
}
@keyframes laBlLoop {
  0%, 12% {
    transform: translate(0, 150px) rotate(-8deg);
  }
  26%, 64% {
    transform: none;
    animation-timing-function: linear;
  }
  74%, 100% {
    transform: translate(0, 150px) rotate(-8deg);
  }
}
@keyframes laWordLoop {
  0%, 30% {
    opacity: 0;
    transform: translateY(12px);
  }
  42%, 60% {
    opacity: 1;
    transform: none;
  }
  68%, 100% {
    opacity: 0;
    transform: translateY(12px);
  }
}
@keyframes laTagLoop {
  0%, 36% {
    opacity: 0;
    transform: translateY(10px);
  }
  48%, 60% {
    opacity: 1;
    transform: none;
  }
  68%, 100% {
    opacity: 0;
    transform: translateY(10px);
  }
}
@keyframes laGoLoop {
  0%, 42% {
    opacity: 0;
    transform: translateY(10px);
  }
  54%, 62% {
    opacity: 1;
    transform: none;
  }
  70%, 100% {
    opacity: 0;
    transform: translateY(10px);
  }
}
.la.is-done .la__q--tl, .la.is-done .la__q--tr, .la.is-done .la__q--br, .la.is-done .la__q--bl,
.la.is-done .la__word, .la.is-done .la__tag, .la.is-done .la__go {
  animation: none;
}

.la.is-done .la__skip {
  display: none;
}

@media (max-width: 340px) {
  .la {
    gap: 4px;
  }
  .la__mark {
    width: 64px;
    height: 64px;
  }
  .la__word {
    font-size: 18px;
  }
  .la__tag {
    font-size: 12px;
  }
  .la__go {
    padding: 4px 16px;
    font-size: 12px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .la .la__q--tl, .la .la__q--tr, .la .la__q--br, .la .la__q--bl,
  .la .la__word, .la .la__tag, .la .la__go {
    animation: none !important;
  }
}

(function () {
  var root = document.getElementById('la');
  var live = document.getElementById('la-live');
  var KEY = 'godrich-intro-016-02';
  // 인트로를 완료 상태로 보낸다 — 조각의 기본 상태는 맞춰진 자리라 애니메이션을 끄면 로고가 완성되어 있다
  function finish(announce) {
    root.classList.remove('is-demo');
    root.classList.add('is-done');
    try { sessionStorage.setItem(KEY, '1'); } catch (e) {}
    if (announce) live.textContent = '인트로를 건너뛰었습니다';
  }
  document.getElementById('la-skip').addEventListener('click', function () { finish(true); });
  document.addEventListener('keydown', function (e) {
    if (e.key === 'Escape') finish(true);
  });
  var seen = false;
  try { seen = sessionStorage.getItem(KEY) !== null; } catch (e) {}
  if (seen) finish(false);
})();

// LogoAssemble — vanilla 판(run/016/demo/02-intro-logo-assemble/index.html) 의 React 포트.
// 사방에서 날아온 조각 네 개가 animation-delay 를 한 칸씩 달리해 가운데로 모이는 인트로.
// @keyframes 본문은 vanilla 와 같은 글자다 (값을 다시 타이핕하지 않는다).
import { useEffect, useState } from "react";
import type { CSSProperties } from "react";
import styles from "./LogoAssemble.module.scss";

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

type Vars = CSSProperties & { "--duration"?: string; "--easing"?: string; "--color"?: string };
// ambient 타입에 맞춰 로컬 타입을 쓴다 — 이벤트 제네릭을 react 에서 import 하면 tsc 가 죽는다
type KeyEvt = { key: string };

const KEY = "godrich-intro-016-02";
const WORD = "GODRICH";
const TAG = "새 브랜드의 첫 인사";
const GO = "둘러보기";
const SKIP = "건너뛰기";
const SKIPPED = "인트로를 건너뛰었습니다";

export default function LogoAssemble(props: LogoAssembleProps) {
  const duration = props.duration ?? 600;
  const easing = props.easing ?? "cubic-bezier(.2, .8, .2, 1)";
  const color = props.color ?? "#2f6df6";
  const [preview, setPreview] = useState<boolean>(true);
  const [done, setDone] = useState<boolean>(false);
  const [message, setMessage] = useState<string>("");

  // 인트로를 완료 상태로 보낸다 — 조각의 기본 상태는 맞춰진 자리라 애니메이션을 끄면 로고가 완성되어 있다
  const finish = (announce: boolean) => {
    setPreview(false);
    setDone(true);
    try { window.sessionStorage.setItem(KEY, "1"); } catch { }
    if (announce) setMessage(SKIPPED);
  };

  useEffect(() => {
    let seen = false;
    try { seen = window.sessionStorage.getItem(KEY) !== null; } catch { seen = false; }
    if (seen) {
      setPreview(false);
      setDone(true);
    }
  }, []);

  useEffect(() => {
    const onKey = (e: KeyEvt) => { if (e.key === "Escape") finish(true); };
    window.addEventListener("keydown", onKey as (e: KeyboardEvent) => void);
    return () => window.removeEventListener("keydown", onKey as (e: KeyboardEvent) => void);
  }, []);

  const vars: Vars = { "--duration": duration + "ms", "--easing": easing, "--color": color };
  const rootCls = styles.la + (preview && !done ? " " + styles.isDemo : "") + (done ? " " + styles.isDone : "");

  return (
    <main className={styles.stage}>
      <div className={rootCls} style={vars}>
        <div className={styles.mark} aria-hidden="true">
          <i className={styles.q + " " + styles.qTl} />
          <i className={styles.q + " " + styles.qTr} />
          <i className={styles.q + " " + styles.qBr} />
          <i className={styles.q + " " + styles.qBl} />
        </div>
        <p className={styles.word}>{WORD}</p>
        <p className={styles.tag}>{TAG}</p>
        <button className={styles.go} type="button">{GO}</button>
        {!done ? (
          <button className={styles.skip} type="button" onClick={() => finish(true)}>{SKIP}</button>
        ) : null}
        <p className={styles.live} aria-live="polite">{message}</p>
      </div>
    </main>
  );
}