07Breathing-glow CTA band

<main class="stage">
  <div class="ctaneu">
    <span class="ctaneu__glow is-demo" aria-hidden="true"></span>
    <h3 class="ctaneu__title">Bring your team in today</h3>
    <button class="ctaneu__btn is-demo" type="button">Start for free</button>
  </div>
</main>

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

$duration: $dur-loop;       // 글로우가 숨쉬듯 커졌다 작아지는 한 주기
$easing: $ease-out;         // 번지는 곡선
$color: $subject-blue;      // 글로우·버튼 강조 색

@include stage($stage-orange);

$neu-surface: mix($stage-orange, black, 94%);
$neu-light: rgba(mix($neu-surface, white, 40%), .5);
$neu-dark: rgba(mix($neu-surface, black, 40%), .4);

.ctaneu {
  position: relative;
  box-sizing: border-box;
  width: clamp(240px, 84vw, 380px);
  padding: $sp-6 $sp-4;
  border-radius: $r-card;
  background: $neu-surface;
  box-shadow: 8px 8px 16px $neu-dark, -8px -8px 16px $neu-light;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: $sp-3;
}
.ctaneu__glow {
  position: absolute;
  top: -20%;
  right: -16%;
  width: clamp(120px, 40vw, 180px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba($color, .35), rgba($color, 0) 70%);
  animation: breathe $duration $easing infinite;
}
.ctaneu__title {
  position: relative;
  margin: 0;
  max-width: 260px;
  color: $subject-ink;
  font-weight: 700; font-size: clamp(15px, 3.6vw, 19px); line-height: 1.3;
}
.ctaneu__btn {
  position: relative;
  border: 0;
  border-radius: $r-pill;
  background: $neu-surface;
  color: $subject-ink;
  padding: $sp-2 $sp-5;
  font-weight: 700; font-size: clamp(12px, 2.8vw, 14px); line-height: 1;
  box-shadow: 5px 5px 10px $neu-dark, -5px -5px 10px $neu-light;
  animation: btnPulse $duration $easing infinite;
}
.ctaneu__btn:focus-visible {
  outline: 3px solid $color;
  outline-offset: 2px;
}

// 데모: 배경 글로우가 숨쉬듯 커졌다 작아지고, 버튼은 살짝 눌렸다 돌아온다
@keyframes breathe {
  0%, 100% { transform: scale(1); opacity: .7; }
  50%      { transform: scale(1.25); opacity: 1; }
}
@keyframes btnPulse {
  0%, 55%, 100% { box-shadow: 5px 5px 10px $neu-dark, -5px -5px 10px $neu-light; transform: scale(1); }
  75%           { box-shadow: inset 3px 3px 6px $neu-dark, inset -3px -3px 6px $neu-light; transform: scale(.96); }
}

@media (prefers-reduced-motion: reduce) {
  .ctaneu__glow, .ctaneu__btn { animation: none !important; transform: none; }
}

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);
}

.ctaneu {
  position: relative;
  box-sizing: border-box;
  width: clamp(240px, 84vw, 380px);
  padding: 24px 16px;
  border-radius: 16px;
  background: rgb(94%, 28.3843137255%, 11.4274509804%);
  box-shadow: 8px 8px 16px rgba(37.6%, 11.3537254902%, 4.5709803922%, 0.4), -8px -8px 16px rgba(97.6%, 71.3537254902%, 64.5709803922%, 0.5);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.ctaneu__glow {
  position: absolute;
  top: -20%;
  right: -16%;
  width: clamp(120px, 40vw, 180px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(47, 109, 246, 0.35), rgba(47, 109, 246, 0) 70%);
  animation: breathe 2s ease-out infinite;
}

.ctaneu__title {
  position: relative;
  margin: 0;
  max-width: 260px;
  color: #17141a;
  font-weight: 700;
  font-size: clamp(15px, 3.6vw, 19px);
  line-height: 1.3;
}

.ctaneu__btn {
  position: relative;
  border: 0;
  border-radius: 999px;
  background: rgb(94%, 28.3843137255%, 11.4274509804%);
  color: #17141a;
  padding: 8px 20px;
  font-weight: 700;
  font-size: clamp(12px, 2.8vw, 14px);
  line-height: 1;
  box-shadow: 5px 5px 10px rgba(37.6%, 11.3537254902%, 4.5709803922%, 0.4), -5px -5px 10px rgba(97.6%, 71.3537254902%, 64.5709803922%, 0.5);
  animation: btnPulse 2s ease-out infinite;
}

.ctaneu__btn:focus-visible {
  outline: 3px solid #2f6df6;
  outline-offset: 2px;
}

@keyframes breathe {
  0%, 100% {
    transform: scale(1);
    opacity: 0.7;
  }
  50% {
    transform: scale(1.25);
    opacity: 1;
  }
}
@keyframes btnPulse {
  0%, 55%, 100% {
    box-shadow: 5px 5px 10px rgba(37.6%, 11.3537254902%, 4.5709803922%, 0.4), -5px -5px 10px rgba(97.6%, 71.3537254902%, 64.5709803922%, 0.5);
    transform: scale(1);
  }
  75% {
    box-shadow: inset 3px 3px 6px rgba(37.6%, 11.3537254902%, 4.5709803922%, 0.4), inset -3px -3px 6px rgba(97.6%, 71.3537254902%, 64.5709803922%, 0.5);
    transform: scale(0.96);
  }
}
@media (prefers-reduced-motion: reduce) {
  .ctaneu__glow, .ctaneu__btn {
    animation: none !important;
    transform: none;
  }
}

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

export type CtaBandNeuProps = {
  title?: string;
  cta?: string;
  duration?: number;
  easing?: string;
  color?: string;
};

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

export default function CtaBandNeu({
  title = "지금 팀에 합류시켜 보세요",
  cta = "무료로 시작",
  duration = 2000,
  easing = "ease-out",
  color = "#2f6df6",
}: CtaBandNeuProps) {
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };
  return (
    <div className={styles.band} style={vars}>
      <span className={styles.glow} aria-hidden="true" />
      <h3 className={styles.title}>{title}</h3>
      <button type="button" className={styles.btn}>{cta}</button>
    </div>
  );
}