04ベータグラデーションピルバッジ

<main class="stage is-demo">
  <span class="pill" aria-label="beta feature">
    <span class="pill__glow"></span>
    <span class="pill__text">BETA</span>
  </span>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: $dur-loop;   // 2s — 색이 번갈아 드러나는 한 주기
$easing: $ease-out;
$color: $subject-blue;

@include stage($stage-orange);

.pill {
  position: relative;
  display: inline-block;
  padding: $sp-2 $sp-6;
  border-radius: $r-pill;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  font-weight: 800;
  font-size: 22px;
  letter-spacing: .08em;
  color: #fff;
  background: $color;
  box-shadow: $shadow-raised;
  overflow: hidden;
}

// 보라 레이어를 겹쳐 두고 opacity 만 오르내린다 — background-position 은
// 리페인트가 스크린샷 타이밍과 안 맞아 프레임 사이 변화가 문턱 아래로 묻혔다 (213 실측)
.pill__glow {
  position: absolute; inset: 0;
  background: linear-gradient(90deg, $stage-yellow, #c3add7);
  opacity: 0;
}

.pill__text {
  position: relative;
}

.stage.is-demo .pill__glow {
  animation: glow-cross $duration $easing infinite;
}

@keyframes glow-cross {
  0%, 10% { opacity: 0; }
  50% { opacity: 1; }
  90%, 100% { opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .stage.is-demo .pill__glow { animation: none; opacity: .5; }
}

html, body {
  margin: 0;
  overflow: hidden;
}

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #ff4d1f;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.pill {
  position: relative;
  display: inline-block;
  padding: 8px 24px;
  border-radius: 999px;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  font-weight: 800;
  font-size: 22px;
  letter-spacing: 0.08em;
  color: #fff;
  background: #2f6df6;
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
  overflow: hidden;
}

.pill__glow {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, #ffd23f, #c3add7);
  opacity: 0;
}

.pill__text {
  position: relative;
}

.stage.is-demo .pill__glow {
  animation: glow-cross 2s ease-out infinite;
}

@keyframes glow-cross {
  0%, 10% {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  90%, 100% {
    opacity: 0;
  }
}
@media (prefers-reduced-motion: reduce) {
  .stage.is-demo .pill__glow {
    animation: none;
    opacity: 0.5;
  }
}

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

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

export default function BadgeBetaPill({
  duration = 2000,
  easing = "ease-out",
  color = "#2f6df6",
  label = "BETA",
}: BadgeBetaPillProps) {
  const vars: CSSProperties = { "--duration": `${duration}ms`, "--easing": easing, "--color": color } as CSSProperties;
  return (
    <span className={styles.pill} style={vars} aria-label="beta feature">
      <span className={styles.glow} />
      <span className={styles.text}>{label}</span>
    </span>
  );
}