08Terminal footer

<main class="stage">
  <footer class="footerhud is-demo">
    <span class="footerhud__corner footerhud__corner--tl" aria-hidden="true"></span>
    <span class="footerhud__corner footerhud__corner--tr" aria-hidden="true"></span>
    <div class="footerhud__noise" aria-hidden="true"></div>
    <div class="footerhud__cols">
      <div class="footerhud__col">
        <p class="footerhud__head">SYSTEM</p>
        <ul>
          <li>Dashboard</li>
          <li>Notification settings</li>
        </ul>
      </div>
      <div class="footerhud__col">
        <p class="footerhud__head">SUPPORT</p>
        <ul>
          <li>Contact us</li>
          <li>Usage guide</li>
        </ul>
      </div>
      <div class="footerhud__col">
        <p class="footerhud__head">LEGAL</p>
        <ul>
          <li>Terms of service</li>
          <li>Privacy policy</li>
        </ul>
      </div>
    </div>
    <p class="footerhud__copy">SENTRY © 2026</p>
  </footer>
</main>

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

$duration: $dur-loop;    // 노이즈 플리커 프레임 스텝의 한 주기
$easing: $ease-out;      // 브래킷이 맥동하는 곡선
$color: $stage-yellow;   // 호박색 터미널 강조색

@include stage($stage-paper);

.footerhud {
  position: relative;
  box-sizing: border-box;
  width: clamp(260px, 88vw, 460px);
  padding: $sp-6 $sp-5 $sp-4;
  border-radius: $r-card;
  background: $subject-ink;
  box-shadow: 0 0 0 1px rgba($color, .4), 0 0 24px rgba($color, .16);
  overflow: hidden;
}

.footerhud__noise {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .06;
  background: repeating-linear-gradient(45deg, rgba($color, .9) 0 1px, rgba($color, 0) 1px 4px);
  background-size: 12px 12px;
  animation: noiseFlicker $duration steps(8) infinite;
}
@keyframes noiseFlicker {
  0%   { background-position: 0 0; }
  100% { background-position: 120px 84px; }
}

.footerhud__corner {
  position: absolute;
  width: 16px;
  height: 16px;
  pointer-events: none;
  border-color: $color;
  border-style: solid;
  border-width: 0;
  animation: cornerPulse $duration $easing infinite;
}
.footerhud__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
.footerhud__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
@keyframes cornerPulse {
  0%, 100% { transform: scale(.55); opacity: .35; }
  50%      { transform: scale(1); opacity: 1; }
}

.footerhud__cols {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: $sp-3;
  margin: 0 0 $sp-4;
}
.footerhud__col {
  min-width: 0;
}
.footerhud__head {
  margin: 0 0 $sp-2;
  color: $color;
  font-family: "Courier New", monospace;
  font-weight: 700;
  font-size: clamp(9px, 2.2vw, 10px);
  line-height: 1;
  letter-spacing: .1em;
}
.footerhud__col ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: $sp-1;
}
.footerhud__col li {
  color: rgba($subject-cream, .7);
  font-weight: 500;
  font-size: clamp(10px, 2.4vw, 11px);
  line-height: 1.4;
  font-family: inherit;
}

.footerhud__copy {
  position: relative;
  margin: 0;
  padding-top: $sp-3;
  border-top: 1px solid rgba($color, .18);
  color: rgba($subject-cream, .72);   // 잉크 면 위 9.18:1 — .4 는 3.66 으로 미달
  font-family: "Courier New", monospace;
  font-weight: 400;
  font-size: clamp(9px, 2.2vw, 10px);
  line-height: 1;
  letter-spacing: .04em;
}

@media (prefers-reduced-motion: reduce) {
  .footerhud__noise, .footerhud__corner {
    animation: none !important;
  }
  .footerhud__noise { opacity: .03; }
  .footerhud__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: #ffffff;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.footerhud {
  position: relative;
  box-sizing: border-box;
  width: clamp(260px, 88vw, 460px);
  padding: 24px 20px 16px;
  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;
}

.footerhud__noise {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.06;
  background: repeating-linear-gradient(45deg, rgba(255, 210, 63, 0.9) 0 1px, rgba(255, 210, 63, 0) 1px 4px);
  background-size: 12px 12px;
  animation: noiseFlicker 2s steps(8) infinite;
}

@keyframes noiseFlicker {
  0% {
    background-position: 0 0;
  }
  100% {
    background-position: 120px 84px;
  }
}
.footerhud__corner {
  position: absolute;
  width: 16px;
  height: 16px;
  pointer-events: none;
  border-color: #ffd23f;
  border-style: solid;
  border-width: 0;
  animation: cornerPulse 2s ease-out infinite;
}

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

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

@keyframes cornerPulse {
  0%, 100% {
    transform: scale(0.55);
    opacity: 0.35;
  }
  50% {
    transform: scale(1);
    opacity: 1;
  }
}
.footerhud__cols {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 0 0 16px;
}

.footerhud__col {
  min-width: 0;
}

.footerhud__head {
  margin: 0 0 8px;
  color: #ffd23f;
  font-family: "Courier New", monospace;
  font-weight: 700;
  font-size: clamp(9px, 2.2vw, 10px);
  line-height: 1;
  letter-spacing: 0.1em;
}

.footerhud__col ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footerhud__col li {
  color: rgba(255, 247, 230, 0.7);
  font-weight: 500;
  font-size: clamp(10px, 2.4vw, 11px);
  line-height: 1.4;
  font-family: inherit;
}

.footerhud__copy {
  position: relative;
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid rgba(255, 210, 63, 0.18);
  color: rgba(255, 247, 230, 0.72);
  font-family: "Courier New", monospace;
  font-weight: 400;
  font-size: clamp(9px, 2.2vw, 10px);
  line-height: 1;
  letter-spacing: 0.04em;
}

@media (prefers-reduced-motion: reduce) {
  .footerhud__noise, .footerhud__corner {
    animation: none !important;
  }
  .footerhud__noise {
    opacity: 0.03;
  }
  .footerhud__corner {
    transform: scale(1);
    opacity: 1;
  }
}

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

export type FooterHudColumn = { head: string; links: string[] };

export type FooterHudProps = {
  columns?: FooterHudColumn[];
  copy?: string;
  duration?: number;
  easing?: string;
  color?: string;
};

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

const defaultColumns: FooterHudColumn[] = [
  { head: "SYSTEM", links: ["대시보드", "알림 설정"] },
  { head: "SUPPORT", links: ["문의하기", "이용 가이드"] },
  { head: "LEGAL", links: ["이용약관", "개인정보처리방침"] },
];

export default function FooterHud({
  columns = defaultColumns,
  copy = "SENTRY © 2026",
  duration = 2000,
  easing = "ease-out",
  color = "#ffd23f",
}: FooterHudProps) {
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <footer className={styles.footer} style={vars}>
      <span className={`${styles.corner} ${styles.cornerTl}`} aria-hidden="true" />
      <span className={`${styles.corner} ${styles.cornerTr}`} aria-hidden="true" />
      <div className={styles.noise} aria-hidden="true" />
      <div className={styles.cols}>
        {columns.map((col) => (
          <div key={col.head} className={styles.col}>
            <p className={styles.head}>{col.head}</p>
            <ul>
              {col.links.map((link) => <li key={link}>{link}</li>)}
            </ul>
          </div>
        ))}
      </div>
      <p className={styles.copy}>{copy}</p>
    </footer>
  );
}