04アクティブステップのパルス

<main class="stage">
  <div class="ts04-track">
    <span class="ts04-node is-done"></span>
    <span class="ts04-line is-done"></span>
    <span class="ts04-step is-demo">
      <span class="ts04-ring"></span>
      <span class="ts04-circle">3</span>
    </span>
    <span class="ts04-line"></span>
    <span class="ts04-node"></span>
  </div>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: $dur-loop;
$easing: $ease-out;
$color: $subject-blue;

@include stage($stage-paper);

.ts04-track {
  display: flex;
  align-items: center;
  gap: 0;
}

.ts04-node {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: rgba(23, 20, 26, .16);
  flex: 0 0 auto;
  &.is-done { background: $color; }
}

.ts04-line {
  width: 40px;
  height: 3px;
  background: rgba(23, 20, 26, .16);
  flex: 0 0 auto;
  &.is-done { background: $color; }
}

.ts04-step {
  position: relative;
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
}

// 지금 처리 중인 단계: 뒤에서 링이 번지는 펄스
.ts04-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid $color;
  opacity: 0;
}

.ts04-step.is-demo .ts04-ring {
  animation: ts04-pulse $duration $easing infinite;
}

@keyframes ts04-pulse {
  0%   { transform: scale(.7); opacity: .8; }
  70%  { transform: scale(1.8); opacity: 0; }
  100% { transform: scale(1.8); opacity: 0; }
}

.ts04-circle {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: $subject-blue-deep;   // 크림 글자가 얹히므로 진한 파랑
  color: $subject-cream;
  display: grid;
  place-items: center;
  font: 700 13px/1 -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
}

@media (prefers-reduced-motion: reduce) {
  .ts04-ring, .ts04-step.is-demo .ts04-ring { animation: none !important; opacity: .6 !important; transform: scale(1) !important; }
}

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

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

.ts04-track {
  display: flex;
  align-items: center;
  gap: 0;
}

.ts04-node {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: rgba(23, 20, 26, 0.16);
  flex: 0 0 auto;
}
.ts04-node.is-done {
  background: #2f6df6;
}

.ts04-line {
  width: 40px;
  height: 3px;
  background: rgba(23, 20, 26, 0.16);
  flex: 0 0 auto;
}
.ts04-line.is-done {
  background: #2f6df6;
}

.ts04-step {
  position: relative;
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
}

.ts04-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid #2f6df6;
  opacity: 0;
}

.ts04-step.is-demo .ts04-ring {
  animation: ts04-pulse 2s ease-out infinite;
}

@keyframes ts04-pulse {
  0% {
    transform: scale(0.7);
    opacity: 0.8;
  }
  70% {
    transform: scale(1.8);
    opacity: 0;
  }
  100% {
    transform: scale(1.8);
    opacity: 0;
  }
}
.ts04-circle {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #0a4fe8;
  color: #fff7e6;
  display: grid;
  place-items: center;
  font: 700 13px/1 -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
}

@media (prefers-reduced-motion: reduce) {
  .ts04-ring, .ts04-step.is-demo .ts04-ring {
    animation: none !important;
    opacity: 0.6 !important;
    transform: scale(1) !important;
  }
}

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

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

export interface ActiveStepPulseProps {
  duration?: string;
  easing?: string;
  color?: string;
  activeNumber?: number;
}

export default function ActiveStepPulse({
  duration = "1.6s",
  easing = "ease-out",
  color = "#2f6df6",
  activeNumber = 3,
}: ActiveStepPulseProps) {
  const style: Vars = { "--duration": duration, "--easing": easing, "--color": color };
  return (
    <div className={styles.track} style={style}>
      <span className={`${styles.node} ${styles.done}`} />
      <span className={`${styles.line} ${styles.done}`} />
      <span className={styles.step}>
        <span className={styles.ring} />
        <span className={styles.circle}>{activeNumber}</span>
      </span>
      <span className={styles.line} />
      <span className={styles.node} />
    </div>
  );
}