06Glass toggle with a light sweep

<main class="stage">
<div class="onx is-demo" id="onx">
  <div class="onx__col">
    <button class="onx__track" id="onxSwitch" type="button" role="switch" aria-checked="false" aria-label="Night mode">
      <span class="onx__light" aria-hidden="true"></span>
      <span class="onx__sweep" aria-hidden="true"></span>
      <span class="onx__star onx__star--1" aria-hidden="true"></span>
      <span class="onx__star onx__star--2" aria-hidden="true"></span>
      <span class="onx__star onx__star--3" aria-hidden="true"></span>
      <span class="onx__star onx__star--4" aria-hidden="true"></span>
      <span class="onx__star onx__star--5" aria-hidden="true"></span>
      <span class="onx__knob" aria-hidden="true"><span class="onx__grip" aria-hidden="true"></span></span>
    </button>
    <p class="onx__state" role="status"><span class="onx__wordOn">On</span><span class="onx__wordOff">Off</span></p>
  </div>
</div>
</main>

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

// 빛이 쓸려 가는 유리 토글 — 노란 무대 위에 뒤집힌 짙은 잉크 유리(어두운 면이 무대와 대비된다).
// 켜질 때 트랙 안 빛이 $subject-blue-deep 면에서 밝은 중심으로 차오르고(radial-gradient 층, opacity 축),
// 사선 반사광 덩어리(sweep)는 노브와 별개 요소로 반대편으로 천천히 흘러 간다($dur-enter 성격의 light sweep).
// 별 점 다섯 개는 노브 도착 시점에 steps(1, end) 컷으로 밝아지고, 상태 글자(꺼짐/켜짐)도 같은 컷.
// 림 라이트는 위·우하 가장자리의 inset 줄, 바깥 글로우는 상태별 box-shadow 두 벌.

$duration: $dur-base;
$easing: $ease-pop;
$color: $subject-blue;

@include stage($stage-yellow);

.onx { display: grid; place-items: center; width: 100%; }
.onx__col { display: flex; flex-direction: column; align-items: center; gap: $sp-3; }

// ── 유리 트랭(= 스위치 버튼) ────────────────────────────────
.onx__track {
  --travel: 94px; // 트랙 190 − 노브 72 − 좌우 여백 24. 좁은 화면에서는 74px
  position: relative;
  display: block; overflow: hidden;
  width: 190px; height: 96px; margin: 0; padding: 0;
  border: 0; border-radius: $r-pill; cursor: pointer;
  background: linear-gradient(180deg, rgba($subject-cream, .1), rgba($subject-cream, 0) 46%, rgba($subject-cream, .12) 62%, rgba($subject-cream, .03)), $subject-ink;
  box-shadow: inset 0 2px 0 rgba($subject-cream, .4), inset -2px -2px 0 rgba($subject-cream, .16), 0 18px 34px rgba($subject-ink, .35);
  transition: box-shadow $duration $ease-out;
}
.onx__track:focus-visible { outline: 2px solid $subject-ink; outline-offset: 3px; }

// 안쪽 빛 — 꺼짐에는 완전히 비어 있고 켜지면 진한 파란 면 위 밝은 중심이 차오른다
.onx__light {
  position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
  background: radial-gradient(120% 150% at 32% 50%, rgba($color, .96), rgba($subject-blue-deep, .92) 62%, rgba($subject-blue-deep, .8));
  opacity: 0;
  transition: opacity $dur-enter $ease-out;
}

// 사선 반사광 덩어리 — 곡면을 따라 휘는 타원 띠. 켜지면 반대편(왼쪽) 으로 천천히 밀린다
.onx__sweep {
  position: absolute; left: 44%; top: 12%; width: 52%; height: 76%;
  border-radius: 50%; pointer-events: none;
  background: linear-gradient(52deg, rgba($stage-paper, 0) 34%, rgba($stage-paper, .46) 56%, rgba($stage-paper, 0) 78%);
  transform: translateX(0) rotate(0deg);
  transition: transform $dur-enter $ease-out;
}

// 별 점 다섯 개 — 노브 위단(노브 시작 y 12) 위쪽 띠에 흩뿌려 어느 상태에서든 보인다
.onx__star {
  position: absolute; border-radius: 50%; pointer-events: none;
  background-color: rgba($subject-cream, .22);
  transition: background-color $dur-quick $ease-out, box-shadow $dur-quick $ease-out;
}
.onx__star--1 { left: 34px; top: 7px; width: 3px; height: 3px; }
.onx__star--2 { left: 66px; top: 5px; width: 2px; height: 2px; }
.onx__star--3 { left: 98px; top: 8px; width: 4px; height: 4px; }
.onx__star--4 { left: 126px; top: 6px; width: 2px; height: 2px; }
.onx__star--5 { left: 152px; top: 9px; width: 3px; height: 3px; }

// 큰 노브(트랙 높이의 75%) — 유리 위를 건너가는 크림 원. 표면에 세로 3줄 그립
.onx__knob {
  position: absolute; left: 12px; top: 12px;
  display: flex; align-items: center; justify-content: center;
  width: 72px; height: 72px; border-radius: 50%;
  background: linear-gradient(180deg, rgba($stage-paper, .5), rgba($stage-paper, .05) 42%, rgba($subject-ink, .16)), $subject-cream;
  box-shadow: 0 10px 18px rgba($subject-ink, .42), inset 0 1px 0 rgba($stage-paper, .9);
  transform: translateX(0);
  transition: transform $duration $easing;
}
.onx__grip {
  width: 18px; height: 22px;
  background-image: linear-gradient(90deg, rgba($subject-ink, .38) 0 2px, transparent 2px 8px, rgba($subject-ink, .38) 8px 10px, transparent 10px 16px, rgba($subject-ink, .38) 16px 18px);
}

// ── 켜짐 ────────────────────────────────────────────────────
.onx.is-on .onx__track {
  box-shadow: inset 0 2px 0 rgba($subject-cream, .4), inset -2px -2px 0 rgba($subject-cream, .16), 0 18px 34px rgba($subject-ink, .35), 0 0 34px rgba($color, .55);
}
.onx.is-on .onx__knob { transform: translateX(var(--travel)); }
.onx.is-on .onx__light { opacity: 1; }
.onx.is-on .onx__sweep { transform: translateX(-76%) rotate(-9deg); }
.onx.is-on .onx__star { background-color: rgba($stage-paper, .95); box-shadow: 0 0 6px rgba($stage-paper, .75); }

// ── 상태 글자(노란 무대 위 잉크) ─────────────────────────────
.onx__state { position: relative; margin: 0; width: 60px; height: 16px; }
.onx__wordOn, .onx__wordOff {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: clamp(12px, 3vw, 14px); line-height: 1; color: rgba($subject-ink, .72);
}
.onx__wordOn { display: none; color: $subject-ink; }
.onx.is-on .onx__wordOn { display: flex; }
.onx.is-on .onx__wordOff { display: none; }

// ── 미리보기 루프(2초 한 바퀴) ────────────────────────────────
// 노브(탄성) → 빛 채움·스윕(길고 유체) → 별 점등 컷 → 글자 컷. 복귀는 90% 안에 끝난다.
.onx.is-demo .onx__knob {
  animation-name: onxKnobLoop; animation-duration: $dur-loop;
  animation-timing-function: $easing; animation-iteration-count: infinite;
}
@keyframes onxKnobLoop {
  0%, 6% { transform: translateX(0); }
  19% { transform: translateX(calc(var(--travel) + 4px)); }
  25%, 56% { transform: translateX(var(--travel)); }
  69% { transform: translateX(-4px); }
  75%, 100% { transform: translateX(0); }
}
.onx.is-demo .onx__light {
  animation-name: onxLightLoop; animation-duration: $dur-loop;
  animation-timing-function: $ease-out; animation-iteration-count: infinite;
}
@keyframes onxLightLoop {
  0%, 8% { opacity: 0; }
  46%, 58% { opacity: 1; }
  88%, 100% { opacity: 0; }
}
.onx.is-demo .onx__sweep {
  animation-name: onxSweepLoop; animation-duration: $dur-loop;
  animation-timing-function: $ease-out; animation-iteration-count: infinite;
}
@keyframes onxSweepLoop {
  0%, 10% { transform: translateX(0) rotate(0deg); }
  48%, 58% { transform: translateX(-76%) rotate(-9deg); }
  86%, 100% { transform: translateX(0) rotate(0deg); }
}
// 별 점등 — 노브 도착(25%) 뒤 컷으로 밝아지고, 끄기 시작(56~58%) 과 함께 컷으로 든다
.onx.is-demo .onx__star {
  animation-name: onxStarLoop; animation-duration: $dur-loop;
  animation-timing-function: steps(1, end); animation-iteration-count: infinite;
}
@keyframes onxStarLoop {
  0%, 28% { background-color: rgba($subject-cream, .22); box-shadow: 0 0 0 rgba($stage-paper, 0); }
  32%, 58% { background-color: rgba($stage-paper, .95); box-shadow: 0 0 6px rgba($stage-paper, .75); }
  62%, 100% { background-color: rgba($subject-cream, .22); box-shadow: 0 0 0 rgba($stage-paper, 0); }
}
// 상태 글자 컷 — 겹치는 유령 프레임이 없게 steps 로 한 프레임에 갈린다
.onx.is-demo .onx__wordOn { display: flex; opacity: 0; }
.onx.is-demo .onx__wordOff { opacity: 1; }
.onx.is-demo .onx__wordOn {
  animation-name: onxWordOnLoop; animation-duration: $dur-loop;
  animation-timing-function: steps(1, end); animation-iteration-count: infinite;
}
@keyframes onxWordOnLoop {
  0%, 8% { opacity: 0; }
  12%, 58% { opacity: 1; }
  62%, 100% { opacity: 0; }
}
.onx.is-demo .onx__wordOff {
  animation-name: onxWordOffLoop; animation-duration: $dur-loop;
  animation-timing-function: steps(1, end); animation-iteration-count: infinite;
}
@keyframes onxWordOffLoop {
  0%, 8% { opacity: 1; }
  12%, 58% { opacity: 0; }
  62%, 100% { opacity: 1; }
}

@media (max-width: 340px) {
  .onx__col { gap: $sp-2; }
  .onx__track { --travel: 74px; width: 150px; height: 76px; }
  .onx__knob { left: 10px; top: 10px; width: 56px; height: 56px; }
  .onx__grip { width: 14px; height: 18px; }
  .onx__star--1 { left: 26px; top: 5px; }
  .onx__star--2 { left: 48px; top: 4px; }
  .onx__star--3 { left: 72px; top: 6px; }
  .onx__star--4 { left: 94px; top: 4px; }
  .onx__star--5 { left: 114px; top: 6px; }
  .onx__state { width: 48px; height: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  .onx .onx__track { transition: none !important; }
  .onx .onx__knob { transition: none !important; }
  .onx .onx__light { transition: none !important; }
  .onx .onx__sweep { transition: none !important; }
  .onx .onx__star { transition: none !important; }
  .onx.is-demo .onx__knob { animation: none !important; }
  .onx.is-demo .onx__light { animation: none !important; }
  .onx.is-demo .onx__sweep { animation: none !important; }
  .onx.is-demo .onx__star { animation: none !important; }
  .onx.is-demo .onx__wordOn { animation: none !important; opacity: 0 !important; }
  .onx.is-demo .onx__wordOff { animation: none !important; opacity: 1 !important; }
}

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

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #ffd23f;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.onx {
  display: grid;
  place-items: center;
  width: 100%;
}

.onx__col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.onx__track {
  --travel: 94px;
  position: relative;
  display: block;
  overflow: hidden;
  width: 190px;
  height: 96px;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  background: linear-gradient(180deg, rgba(255, 247, 230, 0.1), rgba(255, 247, 230, 0) 46%, rgba(255, 247, 230, 0.12) 62%, rgba(255, 247, 230, 0.03)), #17141a;
  box-shadow: inset 0 2px 0 rgba(255, 247, 230, 0.4), inset -2px -2px 0 rgba(255, 247, 230, 0.16), 0 18px 34px rgba(23, 20, 26, 0.35);
  transition: box-shadow 300ms ease-out;
}

.onx__track:focus-visible {
  outline: 2px solid #17141a;
  outline-offset: 3px;
}

.onx__light {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background: radial-gradient(120% 150% at 32% 50%, rgba(47, 109, 246, 0.96), rgba(10, 79, 232, 0.92) 62%, rgba(10, 79, 232, 0.8));
  opacity: 0;
  transition: opacity 600ms ease-out;
}

.onx__sweep {
  position: absolute;
  left: 44%;
  top: 12%;
  width: 52%;
  height: 76%;
  border-radius: 50%;
  pointer-events: none;
  background: linear-gradient(52deg, rgba(255, 255, 255, 0) 34%, rgba(255, 255, 255, 0.46) 56%, rgba(255, 255, 255, 0) 78%);
  transform: translateX(0) rotate(0deg);
  transition: transform 600ms ease-out;
}

.onx__star {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  background-color: rgba(255, 247, 230, 0.22);
  transition: background-color 220ms ease-out, box-shadow 220ms ease-out;
}

.onx__star--1 {
  left: 34px;
  top: 7px;
  width: 3px;
  height: 3px;
}

.onx__star--2 {
  left: 66px;
  top: 5px;
  width: 2px;
  height: 2px;
}

.onx__star--3 {
  left: 98px;
  top: 8px;
  width: 4px;
  height: 4px;
}

.onx__star--4 {
  left: 126px;
  top: 6px;
  width: 2px;
  height: 2px;
}

.onx__star--5 {
  left: 152px;
  top: 9px;
  width: 3px;
  height: 3px;
}

.onx__knob {
  position: absolute;
  left: 12px;
  top: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.5), rgba(255, 255, 255, 0.05) 42%, rgba(23, 20, 26, 0.16)), #fff7e6;
  box-shadow: 0 10px 18px rgba(23, 20, 26, 0.42), inset 0 1px 0 rgba(255, 255, 255, 0.9);
  transform: translateX(0);
  transition: transform 300ms cubic-bezier(0.2, 1.4, 0.4, 1);
}

.onx__grip {
  width: 18px;
  height: 22px;
  background-image: linear-gradient(90deg, rgba(23, 20, 26, 0.38) 0 2px, transparent 2px 8px, rgba(23, 20, 26, 0.38) 8px 10px, transparent 10px 16px, rgba(23, 20, 26, 0.38) 16px 18px);
}

.onx.is-on .onx__track {
  box-shadow: inset 0 2px 0 rgba(255, 247, 230, 0.4), inset -2px -2px 0 rgba(255, 247, 230, 0.16), 0 18px 34px rgba(23, 20, 26, 0.35), 0 0 34px rgba(47, 109, 246, 0.55);
}

.onx.is-on .onx__knob {
  transform: translateX(var(--travel));
}

.onx.is-on .onx__light {
  opacity: 1;
}

.onx.is-on .onx__sweep {
  transform: translateX(-76%) rotate(-9deg);
}

.onx.is-on .onx__star {
  background-color: rgba(255, 255, 255, 0.95);
  box-shadow: 0 0 6px rgba(255, 255, 255, 0.75);
}

.onx__state {
  position: relative;
  margin: 0;
  width: 60px;
  height: 16px;
}

.onx__wordOn, .onx__wordOff {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: clamp(12px, 3vw, 14px);
  line-height: 1;
  color: rgba(23, 20, 26, 0.72);
}

.onx__wordOn {
  display: none;
  color: #17141a;
}

.onx.is-on .onx__wordOn {
  display: flex;
}

.onx.is-on .onx__wordOff {
  display: none;
}

.onx.is-demo .onx__knob {
  animation-name: onxKnobLoop;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 1.4, 0.4, 1);
  animation-iteration-count: infinite;
}

@keyframes onxKnobLoop {
  0%, 6% {
    transform: translateX(0);
  }
  19% {
    transform: translateX(calc(var(--travel) + 4px));
  }
  25%, 56% {
    transform: translateX(var(--travel));
  }
  69% {
    transform: translateX(-4px);
  }
  75%, 100% {
    transform: translateX(0);
  }
}
.onx.is-demo .onx__light {
  animation-name: onxLightLoop;
  animation-duration: 2s;
  animation-timing-function: ease-out;
  animation-iteration-count: infinite;
}

@keyframes onxLightLoop {
  0%, 8% {
    opacity: 0;
  }
  46%, 58% {
    opacity: 1;
  }
  88%, 100% {
    opacity: 0;
  }
}
.onx.is-demo .onx__sweep {
  animation-name: onxSweepLoop;
  animation-duration: 2s;
  animation-timing-function: ease-out;
  animation-iteration-count: infinite;
}

@keyframes onxSweepLoop {
  0%, 10% {
    transform: translateX(0) rotate(0deg);
  }
  48%, 58% {
    transform: translateX(-76%) rotate(-9deg);
  }
  86%, 100% {
    transform: translateX(0) rotate(0deg);
  }
}
.onx.is-demo .onx__star {
  animation-name: onxStarLoop;
  animation-duration: 2s;
  animation-timing-function: steps(1, end);
  animation-iteration-count: infinite;
}

@keyframes onxStarLoop {
  0%, 28% {
    background-color: rgba(255, 247, 230, 0.22);
    box-shadow: 0 0 0 rgba(255, 255, 255, 0);
  }
  32%, 58% {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 0 6px rgba(255, 255, 255, 0.75);
  }
  62%, 100% {
    background-color: rgba(255, 247, 230, 0.22);
    box-shadow: 0 0 0 rgba(255, 255, 255, 0);
  }
}
.onx.is-demo .onx__wordOn {
  display: flex;
  opacity: 0;
}

.onx.is-demo .onx__wordOff {
  opacity: 1;
}

.onx.is-demo .onx__wordOn {
  animation-name: onxWordOnLoop;
  animation-duration: 2s;
  animation-timing-function: steps(1, end);
  animation-iteration-count: infinite;
}

@keyframes onxWordOnLoop {
  0%, 8% {
    opacity: 0;
  }
  12%, 58% {
    opacity: 1;
  }
  62%, 100% {
    opacity: 0;
  }
}
.onx.is-demo .onx__wordOff {
  animation-name: onxWordOffLoop;
  animation-duration: 2s;
  animation-timing-function: steps(1, end);
  animation-iteration-count: infinite;
}

@keyframes onxWordOffLoop {
  0%, 8% {
    opacity: 1;
  }
  12%, 58% {
    opacity: 0;
  }
  62%, 100% {
    opacity: 1;
  }
}
@media (max-width: 340px) {
  .onx__col {
    gap: 8px;
  }
  .onx__track {
    --travel: 74px;
    width: 150px;
    height: 76px;
  }
  .onx__knob {
    left: 10px;
    top: 10px;
    width: 56px;
    height: 56px;
  }
  .onx__grip {
    width: 14px;
    height: 18px;
  }
  .onx__star--1 {
    left: 26px;
    top: 5px;
  }
  .onx__star--2 {
    left: 48px;
    top: 4px;
  }
  .onx__star--3 {
    left: 72px;
    top: 6px;
  }
  .onx__star--4 {
    left: 94px;
    top: 4px;
  }
  .onx__star--5 {
    left: 114px;
    top: 6px;
  }
  .onx__state {
    width: 48px;
    height: 14px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .onx .onx__track {
    transition: none !important;
  }
  .onx .onx__knob {
    transition: none !important;
  }
  .onx .onx__light {
    transition: none !important;
  }
  .onx .onx__sweep {
    transition: none !important;
  }
  .onx .onx__star {
    transition: none !important;
  }
  .onx.is-demo .onx__knob {
    animation: none !important;
  }
  .onx.is-demo .onx__light {
    animation: none !important;
  }
  .onx.is-demo .onx__sweep {
    animation: none !important;
  }
  .onx.is-demo .onx__star {
    animation: none !important;
  }
  .onx.is-demo .onx__wordOn {
    animation: none !important;
    opacity: 0 !important;
  }
  .onx.is-demo .onx__wordOff {
    animation: none !important;
    opacity: 1 !important;
  }
}

var onxRoot = document.getElementById('onx');
var onxSwitch = document.getElementById('onxSwitch');

function onxSet(on) {
  onxSwitch.setAttribute('aria-checked', on ? 'true' : 'false');
  onxRoot.classList.toggle('is-on', on);
}
onxSwitch.addEventListener('pointerdown', function () { onxRoot.classList.remove('is-demo'); });
onxSwitch.addEventListener('click', function () {
  onxRoot.classList.remove('is-demo');
  onxSet(onxSwitch.getAttribute('aria-checked') !== 'true');
});

// LightSweepGlassToggle — vanilla 판(run/076/demo/06-real-oneui-toggle/index.html) 의 React 포트.
// 켜질 때 트랙 안 빛이 차오르고 사선 반사광 덩어리(sweep)는 노브와 별개로 반대편으로 흘러 간다.
// 값·키프레임은 vanilla 와 같다(다시 타이핑하지 않는다). 누르면 미리보기 루프를 뗀다.
import { useState } from "react";
import styles from "./LightSweepGlassToggle.module.scss";

export type LightSweepGlassToggleProps = {
  duration?: number;
  easing?: string;
  color?: string;
};

type Vars = { [k: string]: any };

const ARIA_LABEL = "야간 모드";
const STATE_ON = "켜짐";
const STATE_OFF = "꺼짐";

export default function LightSweepGlassToggle({
  duration = 300,
  easing = "cubic-bezier(.2, 1.4, .4, 1)", // = $ease-pop
  color = "#2f6df6",
}: LightSweepGlassToggleProps) {
  const [on, setOn] = useState(false);
  const [demo, setDemo] = useState(true);
  const vars: Vars = {
    "--duration": `${duration}ms`,
    "--easing": easing,
    "--color": color,
  };
  const cls = [styles.root, demo ? styles.isDemo : "", on ? styles.isOn : ""].filter(Boolean).join(" ");

  function wake() {
    setDemo(false);
  }
  function toggle() {
    setDemo(false);
    setOn((prev) => !prev);
  }

  return (
    <main className={styles.stage}>
      <div className={cls} style={vars}>
        <div className={styles.col}>
          <button
            className={styles.track}
            type="button"
            role="switch"
            aria-checked={on}
            aria-label={ARIA_LABEL}
            onPointerDown={wake}
            onClick={toggle}
          >
            <span className={styles.light} aria-hidden="true"></span>
            <span className={styles.sweep} aria-hidden="true"></span>
            <span className={[styles.star, styles.star1].join(" ")} aria-hidden="true"></span>
            <span className={[styles.star, styles.star2].join(" ")} aria-hidden="true"></span>
            <span className={[styles.star, styles.star3].join(" ")} aria-hidden="true"></span>
            <span className={[styles.star, styles.star4].join(" ")} aria-hidden="true"></span>
            <span className={[styles.star, styles.star5].join(" ")} aria-hidden="true"></span>
            <span className={styles.knob} aria-hidden="true"><span className={styles.grip} aria-hidden="true"></span></span>
          </button>
          <p className={styles.state} role="status">
            <span className={styles.wordOn}>{STATE_ON}</span>
            <span className={styles.wordOff}>{STATE_OFF}</span>
          </p>
        </div>
      </div>
    </main>
  );
}