05Badge elastic pop-in

<main class="stage">
  <article class="card is-demo" tabindex="0">
    <span class="badge" aria-hidden="true">NEW</span>
    <span class="card__media" aria-hidden="true"></span>
    <div class="card__body">
      <h3 class="card__title">Wireless keyboard</h3>
      <p class="card__meta">89,000 KRW</p>
    </div>
  </article>
</main>

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

$duration: $dur-quick;                                  // 뱃지가 튀는 시간
$easing: $ease-pop;
$color: $subject-blue;                                   // 뱃지 배경

@include stage($stage-ink);
.stage { padding: clamp(8px, 2.4vw, 16px); }

.card {
  position: relative;
  width: min(150px, 48vw);
  aspect-ratio: 4 / 3;
  border-radius: $r-card;
  overflow: hidden;
  background: $stage-paper;
  box-shadow: $shadow-press;
  outline: none;
  cursor: pointer;
}
.card__media {
  position: absolute; inset: 0;
  background: linear-gradient(155deg, $color 0%, $stage-ink 100%);
}
.card__body {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: $sp-2 $sp-3;
}
.card__title { margin: 0 0 $sp-1; font-weight: 700; font-size: clamp(11px, 3.2vw, 13px); line-height: 1.3; font-family: inherit; color: $stage-paper; }
.card__meta { margin: 0; font-weight: 500; font-size: clamp(10px, 2.8vw, 11px); line-height: 1.3; font-family: inherit; color: rgba($stage-paper, .85); }

.badge {
  position: absolute;
  top: $sp-2; right: $sp-2;
  z-index: 2;
  padding: $sp-1 $sp-2;
  border-radius: $r-pill;
  background: $color;
  color: $stage-ink;
  font-weight: 700; font-size: 11px; line-height: 1; font-family: inherit;
  transform: scale(0);
  transition: transform $duration $easing;
}

.card:hover .badge,
.card:focus-visible .badge,
.card:active .badge {
  transform: scale(1);
}
.card.is-demo .badge { animation: badge-loop $dur-loop $easing infinite; }
@keyframes badge-loop {
  0%, 15%  { transform: scale(0); }
  35%      { transform: scale(1.25); }
  50%      { transform: scale(.92); }
  65%, 80% { transform: scale(1); }
  100%     { transform: scale(0); }
}

@media (prefers-reduced-motion: reduce) {
  .badge { transition: none; }
  .card.is-demo .badge { animation: none; transform: scale(1); }
}

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);
}

.stage {
  padding: clamp(8px, 2.4vw, 16px);
}

.card {
  position: relative;
  width: min(150px, 48vw);
  aspect-ratio: 4/3;
  border-radius: 16px;
  overflow: hidden;
  background: #ffffff;
  box-shadow: 0 6px 12px rgba(23, 20, 26, 0.32);
  outline: none;
  cursor: pointer;
}

.card__media {
  position: absolute;
  inset: 0;
  background: linear-gradient(155deg, #2f6df6 0%, #17141a 100%);
}

.card__body {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 8px 12px;
}

.card__title {
  margin: 0 0 4px;
  font-weight: 700;
  font-size: clamp(11px, 3.2vw, 13px);
  line-height: 1.3;
  font-family: inherit;
  color: #ffffff;
}

.card__meta {
  margin: 0;
  font-weight: 500;
  font-size: clamp(10px, 2.8vw, 11px);
  line-height: 1.3;
  font-family: inherit;
  color: rgba(255, 255, 255, 0.85);
}

.badge {
  position: absolute;
  top: 8px;
  right: 8px;
  z-index: 2;
  padding: 4px 8px;
  border-radius: 999px;
  background: #2f6df6;
  color: #17141a;
  font-weight: 700;
  font-size: 11px;
  line-height: 1;
  font-family: inherit;
  transform: scale(0);
  transition: transform 220ms cubic-bezier(0.2, 1.4, 0.4, 1);
}

.card:hover .badge,
.card:focus-visible .badge,
.card:active .badge {
  transform: scale(1);
}

.card.is-demo .badge {
  animation: badge-loop 2s cubic-bezier(0.2, 1.4, 0.4, 1) infinite;
}

@keyframes badge-loop {
  0%, 15% {
    transform: scale(0);
  }
  35% {
    transform: scale(1.25);
  }
  50% {
    transform: scale(0.92);
  }
  65%, 80% {
    transform: scale(1);
  }
  100% {
    transform: scale(0);
  }
}
@media (prefers-reduced-motion: reduce) {
  .badge {
    transition: none;
  }
  .card.is-demo .badge {
    animation: none;
    transform: scale(1);
  }
}

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

export type BadgePopCardProps = {
  title: string;
  meta: string;
  badge: string;
  /** 뱃지가 튀는 시간 (기본 220ms) */
  duration?: number;
  easing?: string;
  /** 뱃지 배경 */
  color?: string;
};

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

export default function BadgePopCard({
  title,
  meta,
  badge,
  duration = 220,
  easing = "cubic-bezier(.2,1.4,.4,1)",
  color = "#2f6df6",
}: BadgePopCardProps) {
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <article className={styles.card} style={vars} tabIndex={0}>
      <span className={styles.badge} aria-hidden="true">{badge}</span>
      <span className={styles.media} aria-hidden="true" />
      <div className={styles.body}>
        <h3 className={styles.title}>{title}</h3>
        <p className={styles.meta}>{meta}</p>
      </div>
    </article>
  );
}