01Quote that opens as the side bar grows

<main class="stage">
  <figure class="qb is-demo" aria-label="Quote that opens as the side bar grows">
    <span class="qb__bar" aria-hidden="true"></span>
    <div class="qb__content">
      <blockquote class="qb__body">
        <p class="qb__l1">Good writing is written twice.</p>
        <p class="qb__l2">First for the thinking, then for the reader.</p>
      </blockquote>
      <figcaption class="qb__cite">— Editors' rule of thumb</figcaption>
    </div>
  </figure>
</main>

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

// 블로그 본문 기본 인용구 — 왼쪽 굵은 막대가 scaleY 로 위에서 아래로 자라며 자리를 만들고,
// 문장 둘과 출처가 한 박자씩 차이 나게 내려앉는다. 실제 글에서는 화면에 들어올 때 한 번 재생.
// 격자 미리보기는 .is-demo 가 2초 루프로 돌리고, 복귀는 요소별로 잘게 나눠 흘린다(273-01 선례) —
// 막대+문장이 동시에 움직이는 입장 순간이 최대 변화 프레임으로 남아야 대표 이미지가 산다.
$duration: $dur-loop;
$easing: $ease-spring;
$color: $subject-blue;

@include stage($stage-ink);

.qb {
  box-sizing: border-box;
  width: min(320px, 92vw);
  margin: 0;
  padding: $sp-4 $sp-5;
  border-radius: $r-card;
  background: $subject-cream;
  color: $subject-ink;
  display: grid;
  grid-template-columns: 6px 1fr;
  gap: $sp-4;
  font-family: inherit;
}
.qb * { box-sizing: border-box; }

.qb__bar {
  border-radius: $r-pill;
  background: $color;
}

.qb__content { display: grid; }
.qb__body {
  margin: 0;
  display: grid;
  gap: $sp-2;
}
.qb__l1,
.qb__l2 {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.5;
}
.qb__cite {
  margin: $sp-3 0 0;
  font-size: 11px;
  font-weight: 500;
  line-height: 1.4;
  color: rgba(23, 20, 26, .62);
}

// ── 미리보기 루프(정적 규칙 먼저, 그 위에 덧씌움) ─────────────────
.qb.is-demo .qb__bar {
  transform-origin: top center; // 규칙8: 채움 방향 — 인용 막대는 위에서 아래로 scaleY 로 차오른다(중심이면 가운데서 벌어진다)
  animation-name: qbBar;
  animation-duration: $duration;
  animation-timing-function: $easing;
  animation-iteration-count: infinite;
}
.qb.is-demo .qb__l1 {
  animation-name: qbLine1;
  animation-duration: $duration;
  animation-timing-function: $easing;
  animation-iteration-count: infinite;
}
.qb.is-demo .qb__l2 {
  animation-name: qbLine2;
  animation-duration: $duration;
  animation-timing-function: $easing;
  animation-iteration-count: infinite;
}
.qb.is-demo .qb__cite {
  animation-name: qbCite;
  animation-duration: $duration;
  animation-timing-function: $easing;
  animation-iteration-count: infinite;
}

// 막대: 0~26% 자람 → 80~90% 걷어냄(한 프레임 컷이 아니라 scaleY 로 흘려 면적 분할)
@keyframes qbBar {
  0%        { transform: scaleY(0); }
  26%, 80%  { transform: scaleY(1); }
  90%, 100% { transform: scaleY(0); }
}
// 문장 1: 막대가 반쯤 찬 10%부터 출발
@keyframes qbLine1 {
  0%, 10%   { opacity: 0; transform: translateY(8px); }
  34%, 76%  { opacity: 1; transform: translateY(0); }
  80%, 100% { opacity: 0; }
}
// 문장 2: 한 박자 뒤(20%)
@keyframes qbLine2 {
  0%, 20%   { opacity: 0; transform: translateY(8px); }
  44%, 72%  { opacity: 1; transform: translateY(0); }
  76%, 100% { opacity: 0; }
}
// 출처: 마지막에 짧게
@keyframes qbCite {
  0%, 30%   { opacity: 0; transform: translateY(6px); }
  52%, 68%  { opacity: 1; transform: translateY(0); }
  72%, 100% { opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .qb.is-demo .qb__bar,
  .qb.is-demo .qb__l1,
  .qb.is-demo .qb__l2,
  .qb.is-demo .qb__cite {
    animation: none !important;
  }
}

@media (max-width: 340px) {
  .qb { padding: $sp-3 $sp-4; }
  .qb__l1, .qb__l2 { font-size: 13px; }
  .qb__cite { margin-top: $sp-2; }
}

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);
}

.qb {
  box-sizing: border-box;
  width: min(320px, 92vw);
  margin: 0;
  padding: 16px 20px;
  border-radius: 16px;
  background: #fff7e6;
  color: #17141a;
  display: grid;
  grid-template-columns: 6px 1fr;
  gap: 16px;
  font-family: inherit;
}

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

.qb__bar {
  border-radius: 999px;
  background: #2f6df6;
}

.qb__content {
  display: grid;
}

.qb__body {
  margin: 0;
  display: grid;
  gap: 8px;
}

.qb__l1,
.qb__l2 {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.5;
}

.qb__cite {
  margin: 12px 0 0;
  font-size: 11px;
  font-weight: 500;
  line-height: 1.4;
  color: rgba(23, 20, 26, 0.62);
}

.qb.is-demo .qb__bar {
  transform-origin: top center;
  animation-name: qbBar;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-iteration-count: infinite;
}

.qb.is-demo .qb__l1 {
  animation-name: qbLine1;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-iteration-count: infinite;
}

.qb.is-demo .qb__l2 {
  animation-name: qbLine2;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-iteration-count: infinite;
}

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

@keyframes qbBar {
  0% {
    transform: scaleY(0);
  }
  26%, 80% {
    transform: scaleY(1);
  }
  90%, 100% {
    transform: scaleY(0);
  }
}
@keyframes qbLine1 {
  0%, 10% {
    opacity: 0;
    transform: translateY(8px);
  }
  34%, 76% {
    opacity: 1;
    transform: translateY(0);
  }
  80%, 100% {
    opacity: 0;
  }
}
@keyframes qbLine2 {
  0%, 20% {
    opacity: 0;
    transform: translateY(8px);
  }
  44%, 72% {
    opacity: 1;
    transform: translateY(0);
  }
  76%, 100% {
    opacity: 0;
  }
}
@keyframes qbCite {
  0%, 30% {
    opacity: 0;
    transform: translateY(6px);
  }
  52%, 68% {
    opacity: 1;
    transform: translateY(0);
  }
  72%, 100% {
    opacity: 0;
  }
}
@media (prefers-reduced-motion: reduce) {
  .qb.is-demo .qb__bar,
  .qb.is-demo .qb__l1,
  .qb.is-demo .qb__l2,
  .qb.is-demo .qb__cite {
    animation: none !important;
  }
}
@media (max-width: 340px) {
  .qb {
    padding: 12px 16px;
  }
  .qb__l1, .qb__l2 {
    font-size: 13px;
  }
  .qb__cite {
    margin-top: 8px;
  }
}

// QuoteBarRise — vanilla 판(run/282/demo/01-quote-bar-rise) 의 React 포트.
// 변수 3개(duration·easing·color)는 props 로 받아 CSS 변수(var(--duration) 등)로 들어온다.
import { useState } from "react";
import type { CSSProperties, MouseEvent as ReactMouseEvent } from "react";
import styles from "./QuoteBarRise.module.scss";

export type QuoteBarRiseProps = {
  line1?: string;
  line2?: string;
  cite?: string;
  groupLabel?: string;
  /** 격자 미리보기용 2초 자동 루프. 사람이 손대면 꺼진다 */
  demo?: boolean;
  duration?: number;
  easing?: string;
  color?: string;
};

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

export default function QuoteBarRise({
  line1 = "좋은 글은 두 번 쓴다.",
  line2 = "먼저 생각을 위해, 다음엔 독자를 위해.",
  cite = "— 편집실 수칙",
  groupLabel = "막대가 자라며 열리는 인용구",
  demo = true,
  duration = 2000,
  easing = "cubic-bezier(.2, .8, .2, 1)",
  color = "#2f6df6",
}: QuoteBarRiseProps) {
  const [live, setLive] = useState(demo);
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  // 실사용에서는 카드에 손을 얹는 순간 루프를 뗀다(정적 상태 = 완성된 인용구)
  function onEnter() {
    setLive(false);
  }

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