07Alert band

<main class="stage">
  <div class="ctaband is-demo">
    <span class="ctaband__corner ctaband__corner--tl" aria-hidden="true"></span>
    <span class="ctaband__corner ctaband__corner--tr" aria-hidden="true"></span>
    <span class="ctaband__corner ctaband__corner--bl" aria-hidden="true"></span>
    <span class="ctaband__corner ctaband__corner--br" aria-hidden="true"></span>
    <div class="ctaband__scan" aria-hidden="true"></div>
    <p class="ctaband__eyebrow">ALERT</p>
    <h2 class="ctaband__title">Turn on your watch network right now</h2>
    <button class="ctaband__cta" type="button">Start free trial</button>
  </div>
</main>

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

$duration: $dur-loop;    // 대각 스캔 드리프트 + 버튼 글리치 한 주기
$easing: $ease-out;      // 스캔이 흐르는 곡선
$color: $stage-yellow;   // 호박색 터미널 강조색

@include stage($stage-orange);

.ctaband {
  position: relative;
  box-sizing: border-box;
  width: clamp(280px, 90vw, 520px);
  padding: $sp-8 $sp-6;
  border-radius: $r-card;
  background: $subject-ink;
  box-shadow: 0 0 0 1px rgba($color, .4), 0 0 24px rgba($color, .16);
  overflow: hidden;
}

.ctaband__scan {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(45deg, rgba($color, 0) 0 6px, rgba($color, .12) 6px 7px);
  background-size: 200% 200%;
  background-position: 0% 0%;
  animation: diagDrift $duration linear infinite;
}
@keyframes diagDrift {
  0%   { background-position: 0% 0%; }
  100% { background-position: 100% 100%; }
}

.ctaband__corner {
  position: absolute;
  width: 20px;
  height: 20px;
  pointer-events: none;
  border-color: $color;
  border-style: solid;
  border-width: 0;
  animation: cornerPulse $duration $easing infinite;
}
.ctaband__corner--tl { top: $sp-3; left: $sp-3; border-top-width: 2px; border-left-width: 2px; transform-origin: top left; } // 규칙8: 괄호 꼭짓점 모서리 고정
.ctaband__corner--tr { top: $sp-3; right: $sp-3; border-top-width: 2px; border-right-width: 2px; transform-origin: top right; animation-delay: -.15s; } // 규칙8: 괄호 꼭짓점 모서리 고정
.ctaband__corner--bl { bottom: $sp-3; left: $sp-3; border-bottom-width: 2px; border-left-width: 2px; transform-origin: bottom left; animation-delay: -.3s; } // 규칙8: 괄호 꼭짓점 모서리 고정
.ctaband__corner--br { bottom: $sp-3; right: $sp-3; border-bottom-width: 2px; border-right-width: 2px; transform-origin: bottom right; animation-delay: -.45s; } // 규칙8: 괄호 꼭짓점 모서리 고정
@keyframes cornerPulse {
  0%, 100% { transform: scale(.55); opacity: .35; }
  50%      { transform: scale(1); opacity: 1; }
}

.ctaband__eyebrow {
  position: relative;
  margin: 0 0 $sp-2;
  color: $color;
  font-family: "Courier New", monospace;
  font-weight: 700;
  font-size: clamp(10px, 2.4vw, 11px);
  line-height: 1;
  letter-spacing: .12em;
}
.ctaband__title {
  position: relative;
  margin: 0 0 $sp-5;
  max-width: 22ch;
  color: $subject-cream;
  font-weight: 700;
  font-size: clamp(18px, 4.4vw, 24px);
  line-height: 1.3;
  font-family: inherit;
}
.ctaband__cta {
  position: relative;
  box-sizing: border-box;
  border: 1px solid $color;
  border-radius: $r-control;
  background: rgba($color, .14);
  color: $color;
  padding: $sp-3 $sp-6;
  font-weight: 700;
  font-size: clamp(12px, 2.8vw, 13px);
  line-height: 1;
  font-family: inherit;
  letter-spacing: .02em;
  animation: ctaGlitch $duration linear infinite;
}
@keyframes ctaGlitch {
  0%, 59%, 64%, 100% { transform: translateX(0); opacity: 1; }
  60%                { transform: translateX(-1px); opacity: .85; }
  61%                { transform: translateX(1px); opacity: 1; }
  62%                { transform: translateX(-1px); opacity: .9; }
  63%                { transform: translateX(0); opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .ctaband__scan, .ctaband__corner, .ctaband__cta {
    animation: none !important;
  }
  .ctaband__corner { transform: scale(1); opacity: 1; }
  .ctaband__cta { transform: translateX(0); opacity: 1; }
}

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);
}

.ctaband {
  position: relative;
  box-sizing: border-box;
  width: clamp(280px, 90vw, 520px);
  padding: 32px 24px;
  border-radius: 16px;
  background: #17141a;
  box-shadow: 0 0 0 1px rgba(255, 210, 63, 0.4), 0 0 24px rgba(255, 210, 63, 0.16);
  overflow: hidden;
}

.ctaband__scan {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(45deg, rgba(255, 210, 63, 0) 0 6px, rgba(255, 210, 63, 0.12) 6px 7px);
  background-size: 200% 200%;
  background-position: 0% 0%;
  animation: diagDrift 2s linear infinite;
}

@keyframes diagDrift {
  0% {
    background-position: 0% 0%;
  }
  100% {
    background-position: 100% 100%;
  }
}
.ctaband__corner {
  position: absolute;
  width: 20px;
  height: 20px;
  pointer-events: none;
  border-color: #ffd23f;
  border-style: solid;
  border-width: 0;
  animation: cornerPulse 2s ease-out infinite;
}

.ctaband__corner--tl {
  top: 12px;
  left: 12px;
  border-top-width: 2px;
  border-left-width: 2px;
  transform-origin: top left;
}

.ctaband__corner--tr {
  top: 12px;
  right: 12px;
  border-top-width: 2px;
  border-right-width: 2px;
  transform-origin: top right;
  animation-delay: -0.15s;
}

.ctaband__corner--bl {
  bottom: 12px;
  left: 12px;
  border-bottom-width: 2px;
  border-left-width: 2px;
  transform-origin: bottom left;
  animation-delay: -0.3s;
}

.ctaband__corner--br {
  bottom: 12px;
  right: 12px;
  border-bottom-width: 2px;
  border-right-width: 2px;
  transform-origin: bottom right;
  animation-delay: -0.45s;
}

@keyframes cornerPulse {
  0%, 100% {
    transform: scale(0.55);
    opacity: 0.35;
  }
  50% {
    transform: scale(1);
    opacity: 1;
  }
}
.ctaband__eyebrow {
  position: relative;
  margin: 0 0 8px;
  color: #ffd23f;
  font-family: "Courier New", monospace;
  font-weight: 700;
  font-size: clamp(10px, 2.4vw, 11px);
  line-height: 1;
  letter-spacing: 0.12em;
}

.ctaband__title {
  position: relative;
  margin: 0 0 20px;
  max-width: 22ch;
  color: #fff7e6;
  font-weight: 700;
  font-size: clamp(18px, 4.4vw, 24px);
  line-height: 1.3;
  font-family: inherit;
}

.ctaband__cta {
  position: relative;
  box-sizing: border-box;
  border: 1px solid #ffd23f;
  border-radius: 12px;
  background: rgba(255, 210, 63, 0.14);
  color: #ffd23f;
  padding: 12px 24px;
  font-weight: 700;
  font-size: clamp(12px, 2.8vw, 13px);
  line-height: 1;
  font-family: inherit;
  letter-spacing: 0.02em;
  animation: ctaGlitch 2s linear infinite;
}

@keyframes ctaGlitch {
  0%, 59%, 64%, 100% {
    transform: translateX(0);
    opacity: 1;
  }
  60% {
    transform: translateX(-1px);
    opacity: 0.85;
  }
  61% {
    transform: translateX(1px);
    opacity: 1;
  }
  62% {
    transform: translateX(-1px);
    opacity: 0.9;
  }
  63% {
    transform: translateX(0);
    opacity: 1;
  }
}
@media (prefers-reduced-motion: reduce) {
  .ctaband__scan, .ctaband__corner, .ctaband__cta {
    animation: none !important;
  }
  .ctaband__corner {
    transform: scale(1);
    opacity: 1;
  }
  .ctaband__cta {
    transform: translateX(0);
    opacity: 1;
  }
}

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

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

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

export default function CtaBandHud({
  eyebrow = "ALERT",
  title = "지금 바로 감시망을 켜보세요",
  cta = "무료 체험 시작",
  duration = 2000,
  easing = "ease-out",
  color = "#ffd23f",
}: CtaBandHudProps) {
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <div className={styles.band} style={vars}>
      <span className={`${styles.corner} ${styles.cornerTl}`} aria-hidden="true" />
      <span className={`${styles.corner} ${styles.cornerTr}`} aria-hidden="true" />
      <span className={`${styles.corner} ${styles.cornerBl}`} aria-hidden="true" />
      <span className={`${styles.corner} ${styles.cornerBr}`} aria-hidden="true" />
      <div className={styles.scan} aria-hidden="true" />
      <p className={styles.eyebrow}>{eyebrow}</p>
      <h2 className={styles.title}>{title}</h2>
      <button type="button" className={styles.cta}>{cta}</button>
    </div>
  );
}