033-dot bounce

<main class="stage">
  <div class="dots" role="status" aria-label="Typing">
    <span aria-hidden="true"></span>
    <span aria-hidden="true"></span>
    <span aria-hidden="true"></span>
  </div>
</main>

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

$duration: .9s;                                   // 점 하나의 바운스 주기
$delay: .16s;                                     // 점 사이 시차
$color: $subject-cream;                           // 점 색

@include stage($stage-orange);

.dots {
  display: flex;
  gap: clamp(8px, 3vw, 14px);
}
.dots span {
  width: clamp(12px, 4vw, 18px);
  height: clamp(12px, 4vw, 18px);
  border-radius: 50%;
  background: $color;
  animation: bounce $duration ease-in-out infinite;
}
.dots span:nth-child(2) { animation-delay: $delay; }
.dots span:nth-child(3) { animation-delay: $delay * 2; }

@keyframes bounce {
  0%, 80%, 100% { transform: translateY(0); opacity: .5; }
  40%           { transform: translateY(-14px); opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .dots span { animation: none; opacity: .85; }
}

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);
}

.dots {
  display: flex;
  gap: clamp(8px, 3vw, 14px);
}

.dots span {
  width: clamp(12px, 4vw, 18px);
  height: clamp(12px, 4vw, 18px);
  border-radius: 50%;
  background: #fff7e6;
  animation: bounce 0.9s ease-in-out infinite;
}

.dots span:nth-child(2) {
  animation-delay: 0.16s;
}

.dots span:nth-child(3) {
  animation-delay: 0.32s;
}

@keyframes bounce {
  0%, 80%, 100% {
    transform: translateY(0);
    opacity: 0.5;
  }
  40% {
    transform: translateY(-14px);
    opacity: 1;
  }
}
@media (prefers-reduced-motion: reduce) {
  .dots span {
    animation: none;
    opacity: 0.85;
  }
}

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

export type DotsBounceProps = {
  /** 점 하나의 바운스 주기 (기본 900ms) */
  duration?: number;
  /** 점 사이 시차 (기본 160ms) */
  delay?: number;
  /** 점 색 */
  color?: string;
  label?: string;
};

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

export default function DotsBounce({
  duration = 900,
  delay = 160,
  color = "#fff7e6",
  label = "Typing",
}: DotsBounceProps) {
  const vars: Vars = {
    "--duration": `${duration}ms`,
    "--delay": `${delay}ms`,
    "--color": color,
  };
  return (
    <div className={styles.dots} style={vars} role="status" aria-label={label}>
      <span aria-hidden="true" />
      <span aria-hidden="true" />
      <span aria-hidden="true" />
    </div>
  );
}