03Target-lock cards

<main class="stage">
  <div class="cardgrid is-demo">
    <article class="cardgrid__card">
      <span class="cardgrid__corner cardgrid__corner--tl" aria-hidden="true"></span>
      <span class="cardgrid__corner cardgrid__corner--tr" aria-hidden="true"></span>
      <span class="cardgrid__corner cardgrid__corner--bl" aria-hidden="true"></span>
      <span class="cardgrid__corner cardgrid__corner--br" aria-hidden="true"></span>
      <div class="cardgrid__scan" aria-hidden="true"></div>
      <span class="cardgrid__coord">04.12</span>
      <span class="cardgrid__icon" aria-hidden="true"></span>
      <p class="cardgrid__label">Detect</p>
    </article>
    <article class="cardgrid__card">
      <span class="cardgrid__corner cardgrid__corner--tl" aria-hidden="true"></span>
      <span class="cardgrid__corner cardgrid__corner--tr" aria-hidden="true"></span>
      <span class="cardgrid__corner cardgrid__corner--bl" aria-hidden="true"></span>
      <span class="cardgrid__corner cardgrid__corner--br" aria-hidden="true"></span>
      <div class="cardgrid__scan" aria-hidden="true"></div>
      <span class="cardgrid__coord cardgrid__coord--alt">#A1</span>
      <span class="cardgrid__icon" aria-hidden="true"></span>
      <p class="cardgrid__label">Track</p>
    </article>
    <article class="cardgrid__card">
      <span class="cardgrid__corner cardgrid__corner--tl" aria-hidden="true"></span>
      <span class="cardgrid__corner cardgrid__corner--tr" aria-hidden="true"></span>
      <span class="cardgrid__corner cardgrid__corner--bl" aria-hidden="true"></span>
      <span class="cardgrid__corner cardgrid__corner--br" aria-hidden="true"></span>
      <div class="cardgrid__scan" aria-hidden="true"></div>
      <span class="cardgrid__coord">07.03</span>
      <span class="cardgrid__icon" aria-hidden="true"></span>
      <p class="cardgrid__label">Log</p>
    </article>
    <article class="cardgrid__card">
      <span class="cardgrid__corner cardgrid__corner--tl" aria-hidden="true"></span>
      <span class="cardgrid__corner cardgrid__corner--tr" aria-hidden="true"></span>
      <span class="cardgrid__corner cardgrid__corner--bl" aria-hidden="true"></span>
      <span class="cardgrid__corner cardgrid__corner--br" aria-hidden="true"></span>
      <div class="cardgrid__scan" aria-hidden="true"></div>
      <span class="cardgrid__coord cardgrid__coord--alt">#C4</span>
      <span class="cardgrid__icon" aria-hidden="true"></span>
      <p class="cardgrid__label">Analyze</p>
    </article>
  </div>
</main>

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

$duration: $dur-loop;      // 스캔이 카드 4장을 순서대로 도는 한 주기
$easing: $ease-spring;     // 브래킷이 조여드는 곡선
$color: $stage-yellow;     // 호박색 터미널 강조색

@include stage($stage-orange);

.cardgrid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: $sp-2;
  width: clamp(240px, 84vw, 340px);
}
// 320px 폰 체크: 2x2 고정 그리드라 폭이 줄어도 항상 2행 — coord 줄(HUD 전용 읽음값)까지 4줄이라
// 카드 padding·행간이 129·130 형제와 같은 값이면 2행 합계가 200px 높이를 넘는다
// (131-03 실측: scrollHeight 239px vs innerHeight 200px). padding·margin 을 한 단계씩 좁힌다.

.cardgrid__card {
  position: relative;
  box-sizing: border-box;
  padding: $sp-2;
  border-radius: $r-card;
  background: $subject-ink;
  box-shadow: 0 0 0 1px rgba($color, .4), 0 0 24px rgba($color, .16);
  overflow: hidden;
}
.cardgrid__card:nth-child(1) .cardgrid__scan { animation-delay: 0s; }
.cardgrid__card:nth-child(2) .cardgrid__scan { animation-delay: -.5s; }
.cardgrid__card:nth-child(3) .cardgrid__scan { animation-delay: -1s; }
.cardgrid__card:nth-child(4) .cardgrid__scan { animation-delay: -1.5s; }

.cardgrid__scan {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(to bottom, rgba($color, 0) 0%, rgba($color, .3) 48%, rgba($color, 0) 100%);
  background-size: 100% 240%;
  background-position: 0 -140%;
  animation: cardScan $duration linear infinite;
}
@keyframes cardScan {
  0%   { background-position: 0 -140%; }
  100% { background-position: 0 140%; }
}

.cardgrid__corner {
  position: absolute;
  width: 12px;
  height: 12px;
  pointer-events: none;
  border-color: $color;
  border-style: solid;
  border-width: 0;
  animation: cornerPulse $duration $easing infinite;
}
.cardgrid__corner--tl { top: $sp-2; left: $sp-2; border-top-width: 2px; border-left-width: 2px; transform-origin: top left; } // 규칙8: 괄호 꼭짓점 모서리 고정
.cardgrid__corner--tr { top: $sp-2; right: $sp-2; border-top-width: 2px; border-right-width: 2px; transform-origin: top right; animation-delay: -.15s; } // 규칙8: 괄호 꼭짓점 모서리 고정
.cardgrid__corner--bl { bottom: $sp-2; left: $sp-2; border-bottom-width: 2px; border-left-width: 2px; transform-origin: bottom left; animation-delay: -.3s; } // 규칙8: 괄호 꼭짓점 모서리 고정
.cardgrid__corner--br { bottom: $sp-2; right: $sp-2; 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; }
}

.cardgrid__coord {
  position: relative;
  display: block;
  margin: 0 0 $sp-1;
  color: rgba($color, .85);   // 스캔라인이 지나는 밝은 프레임(#4e4123)에서 .7 은 4.30:1 — .85 로 5.49:1
  font-family: "Courier New", monospace;
  font-weight: 700;
  font-size: clamp(9px, 2.2vw, 10px);
  line-height: 1;
  letter-spacing: .04em;
  text-align: right;
}
.cardgrid__coord--alt {
  color: $subject-sky;   // 어두운 카드 면 위 쿨 강조 글자. 이 카드는 호박색 스캔라인이 늘 지나 면이 #352c1f 까지 밝아진다 — $subject-blue 2.59:1, $subject-blue-light 도 그 프레임에서 4.28:1 로 미달이라 한 단계 더 밝은 $subject-sky(7.42:1)
}

.cardgrid__icon {
  position: relative;
  display: block;
  width: 20px;
  height: 20px;
  margin: 0 0 $sp-2;
  border: 1px solid $color;
  border-radius: $r-xs;
  background: rgba($color, .18);
}

.cardgrid__label {
  position: relative;
  margin: 0;
  color: $subject-cream;
  font-weight: 700;
  font-size: clamp(12px, 2.8vw, 13px);
  line-height: 1.3;
  font-family: inherit;
}

@media (prefers-reduced-motion: reduce) {
  .cardgrid__scan, .cardgrid__corner {
    animation: none !important;
  }
  .cardgrid__corner { transform: scale(1); 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);
}

.cardgrid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  width: clamp(240px, 84vw, 340px);
}

.cardgrid__card {
  position: relative;
  box-sizing: border-box;
  padding: 8px;
  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;
}

.cardgrid__card:nth-child(1) .cardgrid__scan {
  animation-delay: 0s;
}

.cardgrid__card:nth-child(2) .cardgrid__scan {
  animation-delay: -0.5s;
}

.cardgrid__card:nth-child(3) .cardgrid__scan {
  animation-delay: -1s;
}

.cardgrid__card:nth-child(4) .cardgrid__scan {
  animation-delay: -1.5s;
}

.cardgrid__scan {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(to bottom, rgba(255, 210, 63, 0) 0%, rgba(255, 210, 63, 0.3) 48%, rgba(255, 210, 63, 0) 100%);
  background-size: 100% 240%;
  background-position: 0 -140%;
  animation: cardScan 2s linear infinite;
}

@keyframes cardScan {
  0% {
    background-position: 0 -140%;
  }
  100% {
    background-position: 0 140%;
  }
}
.cardgrid__corner {
  position: absolute;
  width: 12px;
  height: 12px;
  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;
}

.cardgrid__corner--tl {
  top: 8px;
  left: 8px;
  border-top-width: 2px;
  border-left-width: 2px;
  transform-origin: top left;
}

.cardgrid__corner--tr {
  top: 8px;
  right: 8px;
  border-top-width: 2px;
  border-right-width: 2px;
  transform-origin: top right;
  animation-delay: -0.15s;
}

.cardgrid__corner--bl {
  bottom: 8px;
  left: 8px;
  border-bottom-width: 2px;
  border-left-width: 2px;
  transform-origin: bottom left;
  animation-delay: -0.3s;
}

.cardgrid__corner--br {
  bottom: 8px;
  right: 8px;
  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;
  }
}
.cardgrid__coord {
  position: relative;
  display: block;
  margin: 0 0 4px;
  color: rgba(255, 210, 63, 0.85);
  font-family: "Courier New", monospace;
  font-weight: 700;
  font-size: clamp(9px, 2.2vw, 10px);
  line-height: 1;
  letter-spacing: 0.04em;
  text-align: right;
}

.cardgrid__coord--alt {
  color: #6ec8ff;
}

.cardgrid__icon {
  position: relative;
  display: block;
  width: 20px;
  height: 20px;
  margin: 0 0 8px;
  border: 1px solid #ffd23f;
  border-radius: 4px;
  background: rgba(255, 210, 63, 0.18);
}

.cardgrid__label {
  position: relative;
  margin: 0;
  color: #fff7e6;
  font-weight: 700;
  font-size: clamp(12px, 2.8vw, 13px);
  line-height: 1.3;
  font-family: inherit;
}

@media (prefers-reduced-motion: reduce) {
  .cardgrid__scan, .cardgrid__corner {
    animation: none !important;
  }
  .cardgrid__corner {
    transform: scale(1);
    opacity: 1;
  }
}

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

export type CardGridHudCard = { coord: string; label: string; alt?: boolean };

export type CardGridHudProps = {
  cards?: CardGridHudCard[];
  duration?: number;
  easing?: string;
  color?: string;
};

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

const defaultCards: CardGridHudCard[] = [
  { coord: "04.12", label: "감지" },
  { coord: "#A1", label: "추적", alt: true },
  { coord: "07.03", label: "기록" },
  { coord: "#C4", label: "분석", alt: true },
];

export default function CardGridHud({
  cards = defaultCards,
  duration = 2000,
  easing = "cubic-bezier(.2,.8,.2,1)",
  color = "#ffd23f",
}: CardGridHudProps) {
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <div className={styles.grid} style={vars}>
      {cards.map((card) => (
        <article key={card.coord} className={styles.card}>
          <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} ${styles.cornerBr}`} aria-hidden="true" />
          <div className={styles.scan} aria-hidden="true" />
          <span className={`${styles.coord} ${card.alt ? styles.coordAlt : ""}`}>{card.coord}</span>
          <span className={styles.icon} aria-hidden="true" />
          <p className={styles.label}>{card.label}</p>
        </article>
      ))}
    </div>
  );
}