01Lock-on hero

<main class="stage">
  <section class="hero is-demo">
    <span class="hero__corner hero__corner--tl" aria-hidden="true"></span>
    <span class="hero__corner hero__corner--tr" aria-hidden="true"></span>
    <span class="hero__corner hero__corner--bl" aria-hidden="true"></span>
    <span class="hero__corner hero__corner--br" aria-hidden="true"></span>
    <div class="hero__scan" aria-hidden="true"></div>
    <p class="hero__eyebrow"><span class="hero__dot" aria-hidden="true"></span>SENTRY / ONLINE</p>
    <h1 class="hero__title">Never miss a moment —<br>a dashboard that watches</h1>
    <p class="hero__desc">It detects and logs in real time.</p>
    <button class="hero__cta" type="button">Start for free</button>
    <p class="hero__readout">SIG <span class="hero__cursor" aria-hidden="true"></span></p>
  </section>
</main>

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

$duration: $dur-loop;       // 브래킷 락온 + 스캔 한 주기
$easing: $ease-spring;      // 브래킷이 조여드는 곡선
$color: $stage-yellow;      // 호박색 터미널 강조색

@include stage($stage-ink);

.hero {
  position: relative;
  box-sizing: border-box;
  width: clamp(240px, 82vw, 380px);
  padding: $sp-5 $sp-4;
  border-radius: $r-sm;
  background: $subject-ink;
  box-shadow: 0 0 0 1px rgba($color, .4), 0 0 24px rgba($color, .16);
  overflow: hidden;
  // 320px 폰 체크: eyebrow·2줄 제목·설명·CTA·터미널 readout 5단이 129·130 형제보다 한 단 더 많아
  // 200px 높이를 넘는다 (131-01 실측: scrollHeight 238px vs innerHeight 200px). 단마다 여백을
  // 한 단계씩 좁혀 맞춘다.
}

.hero__scan {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(to bottom, rgba($color, 0) 0, rgba($color, 0) 5px, rgba($color, .1) 6px, rgba($color, 0) 7px),
    linear-gradient(to bottom, rgba($color, 0) 0%, rgba($color, .32) 48%, rgba($color, 0) 100%);
  background-size: 100% 100%, 100% 240%;
  background-position: 0 0, 0 -140%;
  animation: scanSweep $duration linear infinite;
}
@keyframes scanSweep {
  0%   { background-position: 0 0, 0 -140%; }
  100% { background-position: 0 0, 0 140%; }
}

.hero__corner {
  position: absolute;
  width: 18px;
  height: 18px;
  pointer-events: none;
  border-color: $color;
  border-style: solid;
  border-width: 0;
  animation: cornerPulse $duration $easing infinite;
}
.hero__corner--tl { top: 0; left: 0; border-top-width: 2px; border-left-width: 2px; transform-origin: top left; } // 규칙8: 괄호 꼭짓점 모서리 고정
.hero__corner--tr { top: 0; right: 0; border-top-width: 2px; border-right-width: 2px; transform-origin: top right; animation-delay: -.15s; } // 규칙8: 괄호 꼭짓점 모서리 고정
.hero__corner--bl { bottom: 0; left: 0; border-bottom-width: 2px; border-left-width: 2px; transform-origin: bottom left; animation-delay: -.3s; } // 규칙8: 괄호 꼭짓점 모서리 고정
.hero__corner--br { bottom: 0; right: 0; 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; }
}

.hero__eyebrow {
  position: relative;
  margin: 0 0 $sp-2;
  display: flex;
  align-items: center;
  gap: $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;
  text-transform: uppercase;
}
.hero__dot {
  width: 6px;
  height: 6px;
  flex: none;
  border-radius: 50%;
  background: $color;
  animation: blink $dur-loop steps(1) infinite;
}
@keyframes blink {
  0%, 49%  { opacity: 1; }
  50%, 100% { opacity: .2; }
}

.hero__title {
  position: relative;
  margin: 0 0 $sp-1;
  color: $subject-cream;
  font-weight: 700;
  font-size: clamp(18px, 5vw, 25px);
  line-height: 1.15;
  font-family: inherit;
}
.hero__desc {
  position: relative;
  margin: 0 0 $sp-3;
  color: rgba($subject-cream, .85);   // 스캔라인이 지나는 밝은 프레임(#544623)에서 .6 은 4.29:1 — .85 로 6.77:1
  font-weight: 500;
  font-size: clamp(12px, 2.8vw, 14px);
  line-height: 1.4;
  font-family: inherit;
}
.hero__cta {
  position: relative;
  border: 1px solid $color;
  border-radius: $r-control;
  background: rgba($color, .12);
  color: $color;
  padding: $sp-1 $sp-5;
  font-weight: 700;
  font-size: clamp(12px, 2.8vw, 13px);
  line-height: 1;
  font-family: inherit;
  letter-spacing: .02em;
}
.hero__readout {
  position: relative;
  margin: $sp-2 0 0;
  color: rgba($color, .7);
  font-family: "Courier New", monospace;
  font-weight: 400;
  font-size: clamp(9px, 2.2vw, 10px);
  line-height: 1;
  letter-spacing: .04em;
}
.hero__cursor {
  display: inline-block;
  width: 6px;
  height: 10px;
  background: $color;
  vertical-align: -1px;
  animation: blink $dur-loop steps(1) infinite;
}

@media (prefers-reduced-motion: reduce) {
  .hero__scan, .hero__corner, .hero__dot, .hero__cursor {
    animation: none !important;
  }
  .hero__corner { transform: scale(1); opacity: 1; }
  .hero__dot, .hero__cursor { opacity: 1; }
}

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

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #17141a;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.hero {
  position: relative;
  box-sizing: border-box;
  width: clamp(240px, 82vw, 380px);
  padding: 20px 16px;
  border-radius: 8px;
  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;
}

.hero__scan {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(to bottom, rgba(255, 210, 63, 0) 0, rgba(255, 210, 63, 0) 5px, rgba(255, 210, 63, 0.1) 6px, rgba(255, 210, 63, 0) 7px), linear-gradient(to bottom, rgba(255, 210, 63, 0) 0%, rgba(255, 210, 63, 0.32) 48%, rgba(255, 210, 63, 0) 100%);
  background-size: 100% 100%, 100% 240%;
  background-position: 0 0, 0 -140%;
  animation: scanSweep 2s linear infinite;
}

@keyframes scanSweep {
  0% {
    background-position: 0 0, 0 -140%;
  }
  100% {
    background-position: 0 0, 0 140%;
  }
}
.hero__corner {
  position: absolute;
  width: 18px;
  height: 18px;
  pointer-events: none;
  border-color: #ffd23f;
  border-style: solid;
  border-width: 0;
  animation: cornerPulse 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

.hero__corner--tl {
  top: 0;
  left: 0;
  border-top-width: 2px;
  border-left-width: 2px;
  transform-origin: top left;
}

.hero__corner--tr {
  top: 0;
  right: 0;
  border-top-width: 2px;
  border-right-width: 2px;
  transform-origin: top right;
  animation-delay: -0.15s;
}

.hero__corner--bl {
  bottom: 0;
  left: 0;
  border-bottom-width: 2px;
  border-left-width: 2px;
  transform-origin: bottom left;
  animation-delay: -0.3s;
}

.hero__corner--br {
  bottom: 0;
  right: 0;
  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;
  }
}
.hero__eyebrow {
  position: relative;
  margin: 0 0 8px;
  display: flex;
  align-items: center;
  gap: 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;
  text-transform: uppercase;
}

.hero__dot {
  width: 6px;
  height: 6px;
  flex: none;
  border-radius: 50%;
  background: #ffd23f;
  animation: blink 2s steps(1) infinite;
}

@keyframes blink {
  0%, 49% {
    opacity: 1;
  }
  50%, 100% {
    opacity: 0.2;
  }
}
.hero__title {
  position: relative;
  margin: 0 0 4px;
  color: #fff7e6;
  font-weight: 700;
  font-size: clamp(18px, 5vw, 25px);
  line-height: 1.15;
  font-family: inherit;
}

.hero__desc {
  position: relative;
  margin: 0 0 12px;
  color: rgba(255, 247, 230, 0.85);
  font-weight: 500;
  font-size: clamp(12px, 2.8vw, 14px);
  line-height: 1.4;
  font-family: inherit;
}

.hero__cta {
  position: relative;
  border: 1px solid #ffd23f;
  border-radius: 12px;
  background: rgba(255, 210, 63, 0.12);
  color: #ffd23f;
  padding: 4px 20px;
  font-weight: 700;
  font-size: clamp(12px, 2.8vw, 13px);
  line-height: 1;
  font-family: inherit;
  letter-spacing: 0.02em;
}

.hero__readout {
  position: relative;
  margin: 8px 0 0;
  color: rgba(255, 210, 63, 0.7);
  font-family: "Courier New", monospace;
  font-weight: 400;
  font-size: clamp(9px, 2.2vw, 10px);
  line-height: 1;
  letter-spacing: 0.04em;
}

.hero__cursor {
  display: inline-block;
  width: 6px;
  height: 10px;
  background: #ffd23f;
  vertical-align: -1px;
  animation: blink 2s steps(1) infinite;
}

@media (prefers-reduced-motion: reduce) {
  .hero__scan, .hero__corner, .hero__dot, .hero__cursor {
    animation: none !important;
  }
  .hero__corner {
    transform: scale(1);
    opacity: 1;
  }
  .hero__dot, .hero__cursor {
    opacity: 1;
  }
}

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

export type HeroHudProps = {
  brand?: string;
  title?: string;
  desc?: string;
  cta?: string;
  readout?: string;
  /** 한 주기(기본 2000ms) */
  duration?: number;
  easing?: string;
  color?: string;
};

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

export default function HeroHud({
  brand = "SENTRY / ONLINE",
  title = "놓치는 순간 없이 지켜보는 대시보드",
  desc = "실시간으로 감지하고 기록합니다",
  cta = "무료로 시작",
  readout = "SIG",
  duration = 2000,
  easing = "cubic-bezier(.2,.8,.2,1)",
  color = "#ffd23f",
}: HeroHudProps) {
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <section className={styles.hero} 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}>
        <span className={styles.dot} aria-hidden="true" />
        {brand}
      </p>
      <h1 className={styles.title}>{title}</h1>
      <p className={styles.desc}>{desc}</p>
      <button type="button" className={styles.cta}>{cta}</button>
      <p className={styles.readoutLine}>
        {readout} <span className={styles.cursor} aria-hidden="true" />
      </p>
    </section>
  );
}