07Chevron wave

<main class="stage">
  <div class="cw-wave" aria-hidden="true">
    <span class="cw-chevron cw-chevron--1"></span>
    <span class="cw-chevron cw-chevron--2"></span>
    <span class="cw-chevron cw-chevron--3"></span>
    <span class="cw-chevron cw-chevron--trail"></span>
  </div>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: 1.5s;
$easing: $ease-out;
$color: $subject-cream;

@include stage($stage-orange);

.cw-wave {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: $sp-1;
}

.cw-chevron {
  width: 22px;
  height: 22px;
  border-bottom: 3px solid $color;
  border-right: 3px solid $color;
  transform: rotate(45deg) translateY(0);
  opacity: .3;
}

// 자동 재생: 아래로 겹쳐 둔 셰브론 세 개가 순서대로 밝아졌다 흐려지며 물결처럼 흘러간다. 42%에서 오버슛했다 50%에서 정착한다
@keyframes cw-pulse {
  0%, 100% { opacity: .3; transform: rotate(45deg) translateY(0); }
  42%      { opacity: 1; transform: rotate(45deg) translateY(8px); }
  50%      { opacity: 1; transform: rotate(45deg) translateY(6px); }
}
.cw-chevron { animation: cw-pulse $duration $easing infinite; }
.cw-chevron--1 { animation-delay: 0ms; }
.cw-chevron--2 { animation-delay: 150ms; }
.cw-chevron--3 { animation-delay: 300ms; }

// 트레일 파티클 — 맨 끝에 더 작고 흐린 셰브론 하나가 더 늦게 따라 흐른다
.cw-chevron--trail {
  width: 14px;
  height: 14px;
  opacity: 0;
}
@keyframes cw-trail-pulse {
  0%, 100% { opacity: 0; transform: rotate(45deg) translateY(0) scale(.6); }
  50%      { opacity: .3; transform: rotate(45deg) translateY(10px) scale(.8); }
}
.cw-chevron--trail { animation: cw-trail-pulse $duration $easing 450ms infinite; }

@media (prefers-reduced-motion: reduce) {
  .cw-chevron { animation: none !important; opacity: .7 !important; transform: rotate(45deg) translateY(0) !important; }
  .cw-chevron--trail { opacity: 0 !important; }
}

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);
}

.cw-wave {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.cw-chevron {
  width: 22px;
  height: 22px;
  border-bottom: 3px solid #fff7e6;
  border-right: 3px solid #fff7e6;
  transform: rotate(45deg) translateY(0);
  opacity: 0.3;
}

@keyframes cw-pulse {
  0%, 100% {
    opacity: 0.3;
    transform: rotate(45deg) translateY(0);
  }
  42% {
    opacity: 1;
    transform: rotate(45deg) translateY(8px);
  }
  50% {
    opacity: 1;
    transform: rotate(45deg) translateY(6px);
  }
}
.cw-chevron {
  animation: cw-pulse 1.5s ease-out infinite;
}

.cw-chevron--1 {
  animation-delay: 0ms;
}

.cw-chevron--2 {
  animation-delay: 150ms;
}

.cw-chevron--3 {
  animation-delay: 300ms;
}

.cw-chevron--trail {
  width: 14px;
  height: 14px;
  opacity: 0;
}

@keyframes cw-trail-pulse {
  0%, 100% {
    opacity: 0;
    transform: rotate(45deg) translateY(0) scale(0.6);
  }
  50% {
    opacity: 0.3;
    transform: rotate(45deg) translateY(10px) scale(0.8);
  }
}
.cw-chevron--trail {
  animation: cw-trail-pulse 1.5s ease-out 450ms infinite;
}

@media (prefers-reduced-motion: reduce) {
  .cw-chevron {
    animation: none !important;
    opacity: 0.7 !important;
    transform: rotate(45deg) translateY(0) !important;
  }
  .cw-chevron--trail {
    opacity: 0 !important;
  }
}

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

export interface ChevronWaveProps {
  duration?: string;
  easing?: string;
  color?: string;
}

export default function ChevronWave({
  duration = "1.5s",
  easing = "ease-out",
  color = "#fff7e6",
}: ChevronWaveProps) {
  const style = { "--duration": duration, "--easing": easing, "--color": color } as CSSProperties;
  return (
    <div className={styles.wave} style={style} aria-hidden="true">
      <span className={`${styles.chevron} ${styles.c1}`} />
      <span className={`${styles.chevron} ${styles.c2}`} />
      <span className={`${styles.chevron} ${styles.c3}`} />
      <span className={styles.trail} />
    </div>
  );
}