07Success-value glow toggle — when the number's success value turns on, a border glow value gradually rises and the field switches to a locked value

<main class="stage">
<div class="cg is-demo" id="cg">
  <div class="cg__field">
    <span class="cg__glow" id="cgGlow" aria-hidden="true"></span>
    <input class="cg__input" id="cgInput" type="text" inputmode="numeric" autocomplete="off" spellcheck="false" maxlength="16" value="">
    <span class="cg__icon" id="cgIcon">
      <svg class="cg__open" viewBox="0 0 20 20" width="16" height="16" aria-hidden="true">
        <path d="M6 9V6.5a4 4 0 0 1 7.5-1.9" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round"/>
        <rect x="4" y="9" width="9" height="7" rx="1.6" fill="none" stroke="currentColor" stroke-width="1.8"/>
      </svg>
      <svg class="cg__closed" viewBox="0 0 20 20" width="16" height="16" aria-hidden="true">
        <path d="M6.5 9V6.5a3.5 3.5 0 0 1 7 0V9" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round"/>
        <rect x="4.5" y="9" width="11" height="7.5" rx="1.6" fill="none" stroke="currentColor" stroke-width="1.8"/>
      </svg>
    </span>
  </div>
</div>
</main>

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

// 계산 겹: 빛남 값이 감쇠 포락선(A(t)=e^(-1.1n), n=펄스 순번)으로 3번 펄스치며 잦아든다.
@include stage($stage-orange);

.cg {
  width: 100%;
  max-width: 300px;
}

.cg__field {
  position: relative;
  border-radius: $r-control;
}

.cg__glow {
  position: absolute;
  inset: -3px;
  border-radius: $r-control;
  border: 2px solid $tick-up;
  opacity: 0;
  transform: scale(1);
  pointer-events: none;
}

.cg__glow--on { animation: cgGlow $dur-loop $ease-out; }

@keyframes cgGlow {
  0%   { opacity: 0;   transform: scale(1); }
  15%  { opacity: .9;  transform: scale(1.06); }
  30%  { opacity: .1;  transform: scale(1.01); }
  45%  { opacity: .3;  transform: scale(1.035); }
  60%  { opacity: .05; transform: scale(1.005); }
  75%  { opacity: .1;  transform: scale(1.015); }
  100% { opacity: 0;   transform: scale(1); }
}

.cg__input {
  width: 100%;
  box-sizing: border-box;
  padding: $sp-3 $sp-10 $sp-3 $sp-4;
  border-radius: $r-control;
  border: 0;
  background: $subject-ink;
  color: $subject-cream;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-weight: 600;
  font-size: 16px;
  letter-spacing: .05em;
  position: relative;

  &:focus { outline: 2px solid $subject-ink; outline-offset: 2px; }
  &[readonly] { color: $tick-up; }
}

.cg__icon {
  position: absolute;
  right: $sp-4;
  top: 50%;
  transform: translateY(-50%);
  color: rgba($subject-cream, .55);
  display: grid;
  place-items: center;

  svg { grid-area: 1 / 1; transition: opacity $dur-quick $ease-out, transform $dur-quick $ease-spring; }

  .cg__closed { opacity: 0; transform: scale(.5); }
}

.cg__field--locked .cg__icon {
  color: $tick-up;

  .cg__open { opacity: 0; transform: scale(.5); }
  .cg__closed { opacity: 1; transform: scale(1); }
}

@media (max-width: 340px) {
  .cg__input { padding: $sp-2 $sp-8 $sp-2 $sp-3; font-size: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  .cg__glow--on { animation: none; }
  .cg__icon svg { transition: 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);
}

.cg {
  width: 100%;
  max-width: 300px;
}

.cg__field {
  position: relative;
  border-radius: 12px;
}

.cg__glow {
  position: absolute;
  inset: -3px;
  border-radius: 12px;
  border: 2px solid #3ddc97;
  opacity: 0;
  transform: scale(1);
  pointer-events: none;
}

.cg__glow--on {
  animation: cgGlow 2s ease-out;
}

@keyframes cgGlow {
  0% {
    opacity: 0;
    transform: scale(1);
  }
  15% {
    opacity: 0.9;
    transform: scale(1.06);
  }
  30% {
    opacity: 0.1;
    transform: scale(1.01);
  }
  45% {
    opacity: 0.3;
    transform: scale(1.035);
  }
  60% {
    opacity: 0.05;
    transform: scale(1.005);
  }
  75% {
    opacity: 0.1;
    transform: scale(1.015);
  }
  100% {
    opacity: 0;
    transform: scale(1);
  }
}
.cg__input {
  width: 100%;
  box-sizing: border-box;
  padding: 12px 40px 12px 16px;
  border-radius: 12px;
  border: 0;
  background: #17141a;
  color: #fff7e6;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-weight: 600;
  font-size: 16px;
  letter-spacing: 0.05em;
  position: relative;
}
.cg__input:focus {
  outline: 2px solid #17141a;
  outline-offset: 2px;
}
.cg__input[readonly] {
  color: #3ddc97;
}

.cg__icon {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: rgba(255, 247, 230, 0.55);
  display: grid;
  place-items: center;
}
.cg__icon svg {
  grid-area: 1/1;
  transition: opacity 220ms ease-out, transform 220ms cubic-bezier(0.2, 0.8, 0.2, 1);
}
.cg__icon .cg__closed {
  opacity: 0;
  transform: scale(0.5);
}

.cg__field--locked .cg__icon {
  color: #3ddc97;
}
.cg__field--locked .cg__icon .cg__open {
  opacity: 0;
  transform: scale(0.5);
}
.cg__field--locked .cg__icon .cg__closed {
  opacity: 1;
  transform: scale(1);
}

@media (max-width: 340px) {
  .cg__input {
    padding: 8px 32px 8px 12px;
    font-size: 14px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .cg__glow--on {
    animation: none;
  }
  .cg__icon svg {
    transition: none;
  }
}

(function () {
  var root = document.getElementById('cg');
  var field = root.querySelector('.cg__field');
  var input = document.getElementById('cgInput');
  var glow = document.getElementById('cgGlow');
  var GLOW_MS = 900; // 계산 겹: 빛남 값이 3번 펄스로 잦아드는 데 걸리는 시간(감쇠 포락선)

  function luhnSum(digits) {
    var sum = 0, dbl = false;
    for (var i = digits.length - 1; i >= 0; i--) {
      var d = digits.charCodeAt(i) - 48;
      if (dbl) { d *= 2; if (d > 9) d -= 9; }
      sum += d;
      dbl = !dbl;
    }
    return sum;
  }

  function tryLock() {
    var digits = input.value.replace(/\D/g, '');
    if (digits.length === 16 && luhnSum(digits) % 10 === 0) {
      glow.classList.remove('cg__glow--on');
      void glow.offsetWidth;
      glow.classList.add('cg__glow--on');
      setTimeout(function () {
        field.classList.add('cg__field--locked');
        input.setAttribute('readonly', 'readonly');
      }, GLOW_MS);
    }
  }

  input.addEventListener('input', function () {
    root.classList.remove('is-demo');
    stopAutoplay();
    input.value = input.value.replace(/\D/g, '').slice(0, 16);
    tryLock();
  });

  // 자동 루프: 유효 번호를 채워 빛남 → 잠금까지 보여준 뒤 리셋한다.
  var VALID = '9999999999999995';
  var stopped = false;
  var handle = null;
  function stopAutoplay() { stopped = true; if (handle) { clearTimeout(handle); handle = null; } }

  function typeStep(i) {
    if (stopped) return;
    input.value = VALID.slice(0, i);
    if (i < VALID.length) { handle = setTimeout(function () { typeStep(i + 1); }, 90); }
    else { tryLock(); handle = setTimeout(reset, GLOW_MS + 1400); }
  }
  function reset() {
    if (stopped) return;
    field.classList.remove('cg__field--locked');
    input.removeAttribute('readonly');
    input.value = '';
    handle = setTimeout(function () { typeStep(0); }, 260);
  }

  var reduce = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
  if (!reduce) { typeStep(0); }
  else { input.value = VALID; field.classList.add('cg__field--locked'); input.setAttribute('readonly', 'readonly'); }
})();

import { useEffect, useRef } from "react";
import styles from "./SuccessGlowLock.module.scss";

type Box<T> = { current: T };

const GLOW_MS = 900; // 계산 겹: 빛남 값이 3번 펄스로 잦아드는 데 걸리는 시간(감쇠 포락선)

export default function SuccessGlowLock() {
  const rootRef = useRef(null) as unknown as Box<HTMLDivElement | null>;

  useEffect(() => {
    const root = rootRef.current;
    if (!root) return;
    const field = root.querySelector(`.${styles.field}`) as HTMLElement | null;
    const input = root.querySelector(`.${styles.input}`) as HTMLInputElement | null;
    const glow = root.querySelector(`.${styles.glow}`) as HTMLElement | null;
    if (!field || !input || !glow) return;

    function luhnSum(digits: string) {
      let sum = 0, dbl = false;
      for (let i = digits.length - 1; i >= 0; i--) {
        let d = digits.charCodeAt(i) - 48;
        if (dbl) { d *= 2; if (d > 9) d -= 9; }
        sum += d;
        dbl = !dbl;
      }
      return sum;
    }

    let lockHandle: number | null = null;
    function tryLock() {
      const digits = input!.value.replace(/\D/g, "");
      if (digits.length === 16 && luhnSum(digits) % 10 === 0) {
        glow!.classList.remove(styles["glow--on"]);
        void glow!.offsetWidth;
        glow!.classList.add(styles["glow--on"]);
        lockHandle = window.setTimeout(function () {
          field!.classList.add(styles["field--locked"]);
          input!.setAttribute("readonly", "readonly");
        }, GLOW_MS);
      }
    }

    function onInput() {
      root!.classList.remove(styles["is-demo"]);
      stopAutoplay();
      input!.value = input!.value.replace(/\D/g, "").slice(0, 16);
      tryLock();
    }
    input.addEventListener("input", onInput);

    // 자동 루프: 유효 번호를 채워 빛남 → 잠금까지 보여준 뒤 리셋한다.
    const VALID = "9999999999999995";
    let stopped = false;
    let handle: number | null = null;
    function stopAutoplay() {
      stopped = true;
      if (handle !== null) { window.clearTimeout(handle); handle = null; }
      if (lockHandle !== null) { window.clearTimeout(lockHandle); lockHandle = null; }
    }
    function typeStep(i: number) {
      if (stopped) return;
      input!.value = VALID.slice(0, i);
      if (i < VALID.length) { handle = window.setTimeout(function () { typeStep(i + 1); }, 90); }
      else { tryLock(); handle = window.setTimeout(reset, GLOW_MS + 1400); }
    }
    function reset() {
      if (stopped) return;
      field!.classList.remove(styles["field--locked"]);
      input!.removeAttribute("readonly");
      input!.value = "";
      handle = window.setTimeout(function () { typeStep(0); }, 260);
    }
    const reduce = window.matchMedia("(prefers-reduced-motion: reduce)").matches;
    if (!reduce) { typeStep(0); }
    else {
      input.value = VALID;
      field.classList.add(styles["field--locked"]);
      input.setAttribute("readonly", "readonly");
    }

    return () => {
      stopAutoplay();
      input.removeEventListener("input", onInput);
    };
  }, []);

  return (
    <div ref={rootRef} className={`${styles.stage} ${styles.cg} ${styles["is-demo"]}`}>
      <div className={styles.field}>
        <span className={styles.glow} aria-hidden="true" />
        <input className={styles.input} type="text" inputMode="numeric" autoComplete="off" spellCheck={false} maxLength={16} defaultValue="" />
        <span className={styles.icon}>
          <svg className={styles.open} viewBox="0 0 20 20" width="16" height="16" aria-hidden="true">
            <path d="M6 9V6.5a4 4 0 0 1 7.5-1.9" fill="none" stroke="currentColor" strokeWidth={1.8} strokeLinecap="round" />
            <rect x={4} y={9} width={9} height={7} rx={1.6} fill="none" stroke="currentColor" strokeWidth={1.8} />
          </svg>
          <svg className={styles.closed} viewBox="0 0 20 20" width="16" height="16" aria-hidden="true">
            <path d="M6.5 9V6.5a3.5 3.5 0 0 1 7 0V9" fill="none" stroke="currentColor" strokeWidth={1.8} strokeLinecap="round" />
            <rect x={4.5} y={9} width={11} height={7.5} rx={1.6} fill="none" stroke="currentColor" strokeWidth={1.8} />
          </svg>
        </span>
      </div>
    </div>
  );
}