03Typing indicator dots

<main class="stage">
  <div class="wrap">
    <p class="label">Typing</p>
    <div class="bubble is-demo">
      <span class="dot"></span>
      <span class="dot"></span>
      <span class="dot"></span>
    </div>
  </div>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────────
$duration: $dur-base;      // 점 하나가 튀는 데 걸리는 시간
$easing: $ease-out;
$color: $subject-ink;      // 점 색 (orange 무대라 cream 말풍선 위 ink 점)

@include stage($stage-orange);

.wrap { display: grid; gap: 10px; justify-items: center; }
.label {
  margin: 0;
  font-weight: 600; font-size: clamp(11px, 3.2vw, 13px); line-height: 1; font-family: inherit;
  letter-spacing: .04em;
  color: $subject-ink;   // 주황 무대 위 글자 — AA 4.5 (blog-design 글자 대비)
}
.bubble {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 22px 28px;
  border-radius: $r-pill;
  background: $subject-cream;
  transform-origin: center;

  &.is-demo { animation: bubble-breathe-loop $dur-loop $easing infinite; }
}
.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: $color;
  opacity: .4;

  .bubble.is-demo & {
    animation: dot-bounce-loop $dur-loop $easing infinite;
  }
  // 세 점이 200ms 씩 어긋나게 시작해 파도처럼 보인다 (음수 delay = 이미 진행 중인 위상에서 시작)
  &:nth-child(1) { animation-delay: 0s; }
  &:nth-child(2) { animation-delay: -.2s; }
  &:nth-child(3) { animation-delay: -.4s; }
}

// 점 세 개가 파도처럼 튀는 동안 말풍선 전체도 아주 살짝 숨쉬듯 커졌다 줄어든다 — 작은 UI 라 캔버스 대비 면적을 함께 확보
@keyframes bubble-breathe-loop {
  0%   { transform: scale(1); }
  10%  { transform: scale(1.06); }
  20%  { transform: scale(1); }
  100% { transform: scale(1); }
}
@keyframes dot-bounce-loop {
  0%   { transform: translateY(0); opacity: .4; }
  16%  { transform: translateY(-9px); opacity: 1; }
  32%  { transform: translateY(0); opacity: .4; }
  100% { transform: translateY(0); opacity: .4; }
}

@media (prefers-reduced-motion: reduce) {
  .dot, .bubble.is-demo { animation: none !important; }
  .dot { opacity: .7; }
}

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);
}

.wrap {
  display: grid;
  gap: 10px;
  justify-items: center;
}

.label {
  margin: 0;
  font-weight: 600;
  font-size: clamp(11px, 3.2vw, 13px);
  line-height: 1;
  font-family: inherit;
  letter-spacing: 0.04em;
  color: #17141a;
}

.bubble {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 22px 28px;
  border-radius: 999px;
  background: #fff7e6;
  transform-origin: center;
}
.bubble.is-demo {
  animation: bubble-breathe-loop 2s ease-out infinite;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #17141a;
  opacity: 0.4;
}
.bubble.is-demo .dot {
  animation: dot-bounce-loop 2s ease-out infinite;
}
.dot:nth-child(1) {
  animation-delay: 0s;
}
.dot:nth-child(2) {
  animation-delay: -0.2s;
}
.dot:nth-child(3) {
  animation-delay: -0.4s;
}

@keyframes bubble-breathe-loop {
  0% {
    transform: scale(1);
  }
  10% {
    transform: scale(1.06);
  }
  20% {
    transform: scale(1);
  }
  100% {
    transform: scale(1);
  }
}
@keyframes dot-bounce-loop {
  0% {
    transform: translateY(0);
    opacity: 0.4;
  }
  16% {
    transform: translateY(-9px);
    opacity: 1;
  }
  32% {
    transform: translateY(0);
    opacity: 0.4;
  }
  100% {
    transform: translateY(0);
    opacity: 0.4;
  }
}
@media (prefers-reduced-motion: reduce) {
  .dot, .bubble.is-demo {
    animation: none !important;
  }
  .dot {
    opacity: 0.7;
  }
}

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

export type TypingDotsProps = {
  /** 점 하나가 튀는 데 걸리는 시간 (기본 300ms) */
  duration?: number;
  easing?: string;
  color?: string;
  className?: string;
};

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

export default function TypingDots({
  duration = 300,
  easing = "ease-out",
  color = "#17141a",
  className = "",
}: TypingDotsProps) {
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <div className={`${styles.bubble} ${className}`} style={vars}>
      <span className={styles.dot} />
      <span className={styles.dot} />
      <span className={styles.dot} />
    </div>
  );
}