02Skeleton dạng card

<main class="stage">
  <div class="card">
    <div class="thumb"></div>
    <div class="title"></div>
    <div class="desc"></div>
    <div class="desc short"></div>
  </div>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: $dur-loop;                            // 빛이 카드 한 장을 훑는 시간
$easing: $ease-out;
$color: $subject-ink;                            // 막대 색 (노란 무대라 잉크 톤)

@include stage($stage-yellow);

.card {
  width: clamp(160px, 60%, 260px);
  padding: clamp(10px, 2.6vw, 14px);
  border-radius: $r-card;
  background: rgba($stage-paper, .55);
  box-shadow: $shadow-raised;
  display: grid;
  gap: clamp(8px, 2vw, 10px);
}

// ── 막대 하나의 공통 모양 ──────────────────────────────
%bar {
  position: relative;
  overflow: hidden;
  border-radius: $r-control;
  background: rgba($color, .16);

  &::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba($stage-paper, .85), transparent);
    transform: translateX(-120%);
    animation: shimmer $duration $easing infinite;
  }
}

.thumb { @extend %bar; aspect-ratio: 2 / 1; }
.title { @extend %bar; height: clamp(12px, 3.6vw, 16px); width: 70%; }
.desc  { @extend %bar; height: clamp(9px, 3vw, 12px); }
.desc.short { width: 55%; }

.title::after { animation-delay: -120ms; }
.desc::after  { animation-delay: -240ms; }
.desc.short::after { animation-delay: -360ms; }

@keyframes shimmer {
  to { transform: translateX(120%); }
}

@media (prefers-reduced-motion: reduce) {
  .thumb::after, .title::after, .desc::after { animation: none !important; opacity: .5; transform: translateX(0); }
}

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);
}

.card {
  width: clamp(160px, 60%, 260px);
  padding: clamp(10px, 2.6vw, 14px);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.55);
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
  display: grid;
  gap: clamp(8px, 2vw, 10px);
}

.desc, .title, .thumb {
  position: relative;
  overflow: hidden;
  border-radius: 12px;
  background: rgba(23, 20, 26, 0.16);
}
.desc::after, .title::after, .thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.85), transparent);
  transform: translateX(-120%);
  animation: shimmer 2s ease-out infinite;
}

.thumb {
  aspect-ratio: 2/1;
}

.title {
  height: clamp(12px, 3.6vw, 16px);
  width: 70%;
}

.desc {
  height: clamp(9px, 3vw, 12px);
}

.desc.short {
  width: 55%;
}

.title::after {
  animation-delay: -120ms;
}

.desc::after {
  animation-delay: -240ms;
}

.desc.short::after {
  animation-delay: -360ms;
}

@keyframes shimmer {
  to {
    transform: translateX(120%);
  }
}
@media (prefers-reduced-motion: reduce) {
  .thumb::after, .title::after, .desc::after {
    animation: none !important;
    opacity: 0.5;
    transform: translateX(0);
  }
}

import type { CSSProperties } from "react";
import styles from "./CardSkeleton.module.scss";

export type CardSkeletonProps = {
  /** 빛이 카드 한 장을 훑는 시간 (기본 2000ms) */
  duration?: number;
  /** CSS easing (기본 ease-out) */
  easing?: string;
  /** 막대 색 */
  color?: string;
  className?: string;
};

export default function CardSkeleton({
  duration = 2000,
  easing = "ease-out",
  color = "#17141a",
  className = "",
}: CardSkeletonProps) {
  const vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color } as CSSProperties;
  return (
    <div className={`${styles.card} ${className}`} style={vars}>
      <div className={styles.thumb} />
      <div className={styles.title} />
      <div className={styles.desc} />
      <div className={`${styles.desc} ${styles.short}`} />
    </div>
  );
}