02Quote with a bouncing quotation mark

<main class="stage">
  <figure class="qm is-demo" aria-label="Quote with a bouncing quotation mark">
    <svg class="qm__mark" viewBox="0 0 256 256" width="44" height="44" fill="currentColor" aria-hidden="true"><g><path d="M108 72v72H40a8 8 0 0 1-8-8V72a8 8 0 0 1 8-8h60a8 8 0 0 1 8 8m108-8h-60a8 8 0 0 0-8 8v64a8 8 0 0 0 8 8h68V72a8 8 0 0 0-8-8" opacity=".2"/><path d="M100 56H40a16 16 0 0 0-16 16v64a16 16 0 0 0 16 16h60v8a32 32 0 0 1-32 32a8 8 0 0 0 0 16a48.05 48.05 0 0 0 48-48V72a16 16 0 0 0-16-16m0 80H40V72h60Zm116-80h-60a16 16 0 0 0-16 16v64a16 16 0 0 0 16 16h60v8a32 32 0 0 1-32 32a8 8 0 0 0 0 16a48.05 48.05 0 0 0 48-48V72a16 16 0 0 0-8-16m0 80h-60V72h60Z"/></g></svg>
    <blockquote class="qm__body">
      <p class="qm__l1">Simplify the screen,</p>
      <p class="qm__l2">and its purpose becomes clear.</p>
    </blockquote>
    <figcaption class="qm__cite">— First line of the getting-started guide</figcaption>
  </figure>
</main>

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

// 큰따옴표 아이콘(Phosphor Duotone quotes)이 scale 로 한 번 튀어 올라 자리를 잡고,
// 본문 두 줄이 오른쪽에서 밀려 들어오는 도움말 첫머리용 인용구.
// 아이콘의 overshoot 는 $ease-pop(cubic-bezier(.2,1.4,.4,1)) — y 가 1을 넘는 커브로 튕김을 만든다.
// 복귀는 아이콘 걷어냄+문장 컷을 서로 다른 지점에 두고, 입장(튐+슬라이드 동시)이 최대 변화로 남게.
$duration: $dur-loop;
$easing: $ease-spring;
$color: $subject-ink;

@include stage($stage-yellow);

.qm {
  box-sizing: border-box;
  width: min(300px, 92vw);
  margin: 0;
  display: grid;
  justify-items: start;
  gap: $sp-3;
  color: $color;
  font-family: inherit;
}
.qm * { box-sizing: border-box; }

.qm__mark {
  display: block;
  color: $subject-ink;
}

.qm__body {
  margin: 0;
  display: grid;
  gap: $sp-1;
}
.qm__l1,
.qm__l2 {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
}
.qm__cite {
  margin: 0;
  font-size: 11px;
  font-weight: 500;
  line-height: 1.4;
  color: rgba($subject-ink, .72);
}

// ── 미리보기 루프 ─────────────────
.qm.is-demo .qm__mark {
  transform-origin: left bottom; // 규칙8: 붙는 지점 — 본문과 공유하는 왼쪽 정렬선·본문 위 모서리에 뿌리박은 채 1.14 로 튄다(중심이면 작을 때 정렬선에서 떠오르고 overshoot 에서 정렬선을 왼쪽으로 넘는다)
  animation-name: qmMark;
  animation-duration: $duration;
  animation-timing-function: $ease-pop;
  animation-iteration-count: infinite;
}
.qm.is-demo .qm__l1,
.qm.is-demo .qm__l2 {
  animation-name: qmLine;
  animation-duration: $duration;
  animation-timing-function: $easing;
  animation-iteration-count: infinite;
}
.qm.is-demo .qm__l1 { animation-delay: 80ms; animation-fill-mode: backwards; }
.qm.is-demo .qm__l2 { animation-delay: 180ms; animation-fill-mode: backwards; }
.qm.is-demo .qm__cite {
  animation-name: qmCite;
  animation-duration: $duration;
  animation-timing-function: $easing;
  animation-iteration-count: infinite;
}

// 아이콘: 0~6% 나타나며 22%까지 1.14 배로 튀었다가 30%에 1 로 착지 → 78~90% 걷어냄
@keyframes qmMark {
  0%        { opacity: 0; transform: scale(.2); }
  6%        { opacity: 1; transform: scale(.92); }
  22%       { transform: scale(1.14); }
  30%, 78%  { opacity: 1; transform: scale(1); }
  90%, 100% { opacity: 0; transform: scale(.9); }
}
// 본문: 왼쪽에서 밀려 들어옴(delay 로 한 박자 차이 — 무한 루프에서도 위상이 그대로 유지된다)
@keyframes qmLine {
  0%, 4%    { opacity: 0; transform: translateX(-14px); }
  30%, 74%  { opacity: 1; transform: translateX(0); }
  80%, 100% { opacity: 0; }
}
@keyframes qmCite {
  0%, 18%   { opacity: 0; transform: translateX(-10px); }
  42%, 70%  { opacity: 1; transform: translateX(0); }
  76%, 100% { opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .qm.is-demo .qm__mark,
  .qm.is-demo .qm__l1,
  .qm.is-demo .qm__l2,
  .qm.is-demo .qm__cite {
    animation: none !important;
  }
}

@media (max-width: 340px) {
  .qm { gap: $sp-2; }
  .qm__l1, .qm__l2 { font-size: 14px; }
  .qm__mark { width: 36px; height: 36px; }
}

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);
}

.qm {
  box-sizing: border-box;
  width: min(300px, 92vw);
  margin: 0;
  display: grid;
  justify-items: start;
  gap: 12px;
  color: #17141a;
  font-family: inherit;
}

.qm * {
  box-sizing: border-box;
}

.qm__mark {
  display: block;
  color: #17141a;
}

.qm__body {
  margin: 0;
  display: grid;
  gap: 4px;
}

.qm__l1,
.qm__l2 {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
}

.qm__cite {
  margin: 0;
  font-size: 11px;
  font-weight: 500;
  line-height: 1.4;
  color: rgba(23, 20, 26, 0.72);
}

.qm.is-demo .qm__mark {
  transform-origin: left bottom;
  animation-name: qmMark;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 1.4, 0.4, 1);
  animation-iteration-count: infinite;
}

.qm.is-demo .qm__l1,
.qm.is-demo .qm__l2 {
  animation-name: qmLine;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-iteration-count: infinite;
}

.qm.is-demo .qm__l1 {
  animation-delay: 80ms;
  animation-fill-mode: backwards;
}

.qm.is-demo .qm__l2 {
  animation-delay: 180ms;
  animation-fill-mode: backwards;
}

.qm.is-demo .qm__cite {
  animation-name: qmCite;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-iteration-count: infinite;
}

@keyframes qmMark {
  0% {
    opacity: 0;
    transform: scale(0.2);
  }
  6% {
    opacity: 1;
    transform: scale(0.92);
  }
  22% {
    transform: scale(1.14);
  }
  30%, 78% {
    opacity: 1;
    transform: scale(1);
  }
  90%, 100% {
    opacity: 0;
    transform: scale(0.9);
  }
}
@keyframes qmLine {
  0%, 4% {
    opacity: 0;
    transform: translateX(-14px);
  }
  30%, 74% {
    opacity: 1;
    transform: translateX(0);
  }
  80%, 100% {
    opacity: 0;
  }
}
@keyframes qmCite {
  0%, 18% {
    opacity: 0;
    transform: translateX(-10px);
  }
  42%, 70% {
    opacity: 1;
    transform: translateX(0);
  }
  76%, 100% {
    opacity: 0;
  }
}
@media (prefers-reduced-motion: reduce) {
  .qm.is-demo .qm__mark,
  .qm.is-demo .qm__l1,
  .qm.is-demo .qm__l2,
  .qm.is-demo .qm__cite {
    animation: none !important;
  }
}
@media (max-width: 340px) {
  .qm {
    gap: 8px;
  }
  .qm__l1, .qm__l2 {
    font-size: 14px;
  }
  .qm__mark {
    width: 36px;
    height: 36px;
  }
}

// QuoteMarkPop — vanilla 판(run/282/demo/02-quote-mark-pop) 의 React 포트.
import { useState } from "react";
import type { CSSProperties } from "react";
import styles from "./QuoteMarkPop.module.scss";

export type QuoteMarkPopProps = {
  line1?: string;
  line2?: string;
  cite?: string;
  groupLabel?: string;
  demo?: boolean;
  duration?: number;
  easing?: string;
  color?: string;
};

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

function QuotesMark() {
  return (
    <svg className={styles.mark} viewBox="0 0 256 256" width="44" height="44" fill="currentColor" aria-hidden="true"><g><path d="M108 72v72H40a8 8 0 0 1-8-8V72a8 8 0 0 1 8-8h60a8 8 0 0 1 8 8m108-8h-60a8 8 0 0 0-8 8v64a8 8 0 0 0 8 8h68V72a8 8 0 0 0-8-8" opacity=".2"/><path d="M100 56H40a16 16 0 0 0-16 16v64a16 16 0 0 0 16 16h60v8a32 32 0 0 1-32 32a8 8 0 0 0 0 16a48.05 48.05 0 0 0 48-48V72a16 16 0 0 0-16-16m0 80H40V72h60Zm116-80h-60a16 16 0 0 0-16 16v64a16 16 0 0 0 16 16h60v8a32 32 0 0 1-32 32a8 8 0 0 0 0 16a48.05 48.05 0 0 0 48-48V72a16 16 0 0 0-8-16m0 80h-60V72h60Z"/></g></svg>
  );
}

export default function QuoteMarkPop({
  line1 = "화면을 단순하게 만들면",
  line2 = "쓰임이 분명해진다.",
  cite = "— 시작 가이드 첫 문장",
  groupLabel = "따옴표가 튀어나오는 인용구",
  demo = true,
  duration = 2000,
  easing = "cubic-bezier(.2, .8, .2, 1)",
  color = "#17141a",
}: QuoteMarkPopProps) {
  const [live, setLive] = useState(demo);
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  function onEnter() {
    setLive(false);
  }

  const cls = [styles.qm, live ? styles.isDemo : ""].filter(Boolean).join(" ");
  return (
    <figure className={cls} style={vars} aria-label={groupLabel} onMouseEnter={onEnter}>
      <QuotesMark />
      <blockquote className={styles.body}>
        <p className={styles.l1}>{line1}</p>
        <p className={styles.l2}>{line2}</p>
      </blockquote>
      <figcaption className={styles.cite}>{cite}</figcaption>
    </figure>
  );
}