09Orb buttons & chat input

<main class="stage">
<div class="ch is-demo" id="ch">
  <div class="ch__field">
    <span class="ch__lead" aria-hidden="true"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 256 256" fill="currentColor"><path d="M224,128A96,96,0,0,1,79.93,211.11h0L42.54,223.58a8,8,0,0,1-10.12-10.12l12.47-37.39h0A96,96,0,1,1,224,128Z" opacity="0.2"/><path d="M128,24A104,104,0,0,0,36.18,176.88L24.83,210.93a16,16,0,0,0,20.24,20.24l34.05-11.35A104,104,0,1,0,128,24Zm0,192a87.87,87.87,0,0,1-44.06-11.81,8,8,0,0,0-4-1.08,7.85,7.85,0,0,0-2.53.42L40,216,52.47,178.6a8,8,0,0,0-.66-6.54A88,88,0,1,1,128,216Zm12-88a12,12,0,1,1-12-12A12,12,0,0,1,140,128Zm-44,0a12,12,0,1,1-12-12A12,12,0,0,1,96,128Zm88,0a12,12,0,1,1-12-12A12,12,0,0,1,184,128Z"/></svg></span>
    <span class="ch__box">
      <input class="ch__input" id="chInput" type="text" placeholder="Ask anything" aria-label="What to ask the AI">
      <!-- 미리보기용 고스트 글자. .is-demo 동안만 보이고 그때 placeholder 는 투명해진다 -->
      <span class="ch__ghost" aria-hidden="true">How do I lift this landing page's conversion rate?</span>
    </span>
    <button type="button" class="ch__send" id="chSend" aria-label="Send">
      <span class="ch__dot" aria-hidden="true"></span>
      <span class="ch__ico" aria-hidden="true"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 256 256" fill="currentColor"><path d="M223.69,42.18l-58.22,192a8,8,0,0,1-14.92,1.25L108,148,20.58,105.45a8,8,0,0,1,1.25-14.92l192-58.22A8,8,0,0,1,223.69,42.18Z" opacity="0.2"/><path d="M227.32,28.68a16,16,0,0,0-15.66-4.08l-.15,0L19.57,82.84a16,16,0,0,0-2.49,29.8L102,154l41.3,84.87A15.86,15.86,0,0,0,157.74,248q.69,0,1.38-.06a15.88,15.88,0,0,0,14-11.51l58.2-191.94c0-.05,0-.1,0-.15A16,16,0,0,0,227.32,28.68ZM157.83,231.85l-.05.14,0-.07-40.06-82.3,48-48a8,8,0,0,0-11.31-11.31l-48,48L24.08,98.25l-.07,0,.14,0L216,40Z"/></svg></span>
    </button>
  </div>
  <div class="ch__row">
    <button type="button" class="ch__btn ch__btn--solid">Get an answer</button>
    <button type="button" class="ch__btn ch__btn--quiet">Example prompts</button>
  </div>
  <p class="ch__hint">Answers usually arrive within 2 seconds</p>
</div>
</main>

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

$duration: $dur-loop;    // 묻고 → 보내고 → 돌아오는 한 바퀴
$easing: $ease-out;      // 빛 무리가 번지는 이징
$color: $subject-lilac;  // 빛 무리 색

@include stage($stage-ink);

.ch { box-sizing: border-box; width: min(100%, 400px); }

// ── 둥근 챗 입력창. 포커스 링은 box-shadow 한 겹뿐 — 두 겹 이상 쌓으면 "빛나는 입력창" 이 된다
.ch__field {
  display: flex; align-items: center; gap: $sp-2;
  padding: $sp-2 $sp-2 $sp-2 $sp-4;
  border: 1px solid rgba($subject-cream, .18);
  border-radius: $r-pill;
  background: rgba($subject-cream, .08);
  box-shadow: 0 0 0 0 rgba($color, 0);
  transition: box-shadow $dur-base $easing, border-color $dur-base $easing;
}
.ch__field:focus-within {
  border-color: rgba($color, .62);
  box-shadow: 0 0 0 4px rgba($color, .34);
}

.ch__lead { display: inline-flex; width: 16px; height: 16px; flex: 0 0 auto; color: rgba($subject-cream, .62); }
.ch__lead svg { width: 100%; height: 100%; }

.ch__box { position: relative; display: block; flex: 1 1 auto; min-width: 0; }
.ch__input {
  display: block; width: 100%; border: 0; background: none; padding: 0;
  font-family: inherit; font-weight: 600; font-size: clamp(10px, 2.9vw, 12px); line-height: 1.6;
  color: $subject-cream;                                   // 13.96:1
}
.ch__input:focus { outline: none; }                        // 링을 field 가 그리므로 기본 아웃라인은 뺀다
.ch__input::placeholder { color: rgba($subject-cream, .62); opacity: 1; }   // 6.29:1

.ch__ghost {
  position: absolute; left: 0; top: 0; width: 100%; opacity: 0;
  font-weight: 600; font-size: clamp(10px, 2.9vw, 12px); line-height: 1.6;
  color: $subject-cream; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  pointer-events: none;
}
// 고스트 글자가 보일 땐 placeholder 를 투명하게 — 두 글자가 겹치면 둘 다 못 읽는다
.ch.is-demo .ch__input::placeholder { color: transparent; }

// ── 전송 버튼: 솔리드. 안의 작은 오브 점이 눌림을 표시한다
.ch__send {
  position: relative; display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 30px; flex: 0 0 auto; border: 0; border-radius: 50%; cursor: pointer;
  background: $subject-cream; color: $subject-ink;          // 아이콘 17.11:1
  transition: transform $dur-instant $easing;
}
.ch__ico { display: inline-flex; width: 15px; height: 15px; }
.ch__ico svg { width: 100%; height: 100%; }
.ch__dot {
  position: absolute; right: 5px; top: 5px;
  width: 8px; height: 8px; border-radius: 50%; opacity: .6;
  background: radial-gradient(circle at 50% 50%, rgba($subject-sky, 1) 0%, rgba($subject-blue, 1) 70%);
  transform-origin: 50% 50%;                                // 스스로 완결한 점 — 제 중심에서 커진다
  transition: transform $dur-instant $easing, opacity $dur-instant $easing;
}
.ch__send:active { transform: translateY(1px); }
.ch__send:active .ch__dot { transform: scale(1.55); opacity: 1; }
.ch__send:focus-visible { outline: 2px solid rgba($color, .8); outline-offset: 2px; }

// ── 솔리드 버튼 둘
.ch__row { display: flex; gap: $sp-2; margin-top: $sp-3; }
.ch__btn {
  flex: 1 1 0; padding: $sp-3 $sp-2; border: 0; border-radius: $r-control; cursor: pointer;
  font-family: inherit; font-weight: 800; font-size: clamp(10px, 2.9vw, 12px); line-height: 1;
  transition: transform $dur-quick $easing, box-shadow $dur-quick $easing;
}
.ch__btn--solid { background: $subject-cream; color: $subject-ink; box-shadow: $shadow-press; }   // 17.11:1
.ch__btn--quiet { background: rgba($subject-cream, .12); color: $subject-cream; }                 // 12.33:1
.ch__btn:hover,
.ch__btn:focus-visible { transform: translateY(-1px); }
.ch__btn--solid:hover,
.ch__btn--solid:focus-visible { box-shadow: $shadow-raised; }
.ch__btn:active { transform: translateY(0); }

.ch__hint {
  margin: $sp-3 0 0; text-align: center;
  font-weight: 600; font-size: clamp(8px, 2.4vw, 9px); line-height: 1;
  color: rgba($subject-cream, .62);                          // 7.12:1
}

// ── 미리보기 루프: 포커스 → 빛 무리 한 겹 → 전송 → 원래대로 (복귀 90% 안)
.ch.is-demo .ch__field {
  animation-name: chRing;
  animation-duration: $duration;
  animation-timing-function: $easing;
  animation-iteration-count: infinite;
}
.ch.is-demo .ch__ghost {
  animation-name: chGhost;
  animation-duration: $duration;
  animation-timing-function: steps(1, end);                  // 글자 교체는 컷 — 반투명 유령 프레임을 만들지 않는다
  animation-iteration-count: infinite;
}
.ch.is-demo .ch__send {
  animation-name: chPress;
  animation-duration: $duration;
  animation-timing-function: $easing;
  animation-iteration-count: infinite;
}
.ch.is-demo .ch__dot {
  animation-name: chDot;
  animation-duration: $duration;
  animation-timing-function: $easing;
  animation-iteration-count: infinite;
}

@keyframes chRing {
  0%, 6%    { border-color: rgba($subject-cream, .18); box-shadow: 0 0 0 0 rgba($color, 0); }
  30%, 66%  { border-color: rgba($color, .62);         box-shadow: 0 0 0 4px rgba($color, .34); }
  86%, 100% { border-color: rgba($subject-cream, .18); box-shadow: 0 0 0 0 rgba($color, 0); }
}
@keyframes chGhost {
  0%   { opacity: 0; }
  12%  { opacity: 1; }
  86%  { opacity: 0; }
  100% { opacity: 0; }
}
@keyframes chPress {
  0%, 62%   { transform: translateY(0); }
  66%, 74%  { transform: translateY(1px); }
  78%, 100% { transform: translateY(0); }
}
@keyframes chDot {
  0%, 62%   { transform: scale(1);   opacity: .6; }
  66%, 74%  { transform: scale(1.55); opacity: 1; }
  78%, 100% { transform: scale(1);   opacity: .6; }
}

// ── 320×200 폰 실측 대비 압축 (BD9). 이 블록 안에서는 간격을 올리지 않는다
@media (max-width: 340px), (max-height: 220px) {
  .ch__field { padding: $sp-1 $sp-1 $sp-1 $sp-3; }
  .ch__lead { width: 14px; height: 14px; }
  .ch__input, .ch__ghost { font-size: 10px; }
  .ch__send { width: 26px; height: 26px; }
  .ch__ico { width: 13px; height: 13px; }
  .ch__row { margin-top: $sp-2; }
  .ch__btn { padding: $sp-2; font-size: 10px; }
  .ch__hint { margin-top: $sp-2; font-size: 7px; }
}

@media (prefers-reduced-motion: reduce) {
  // 움직임만 뺀다 — 포커스 링과 고스트 글자라는 피드백은 그대로 남긴다
  .ch.is-demo .ch__field,
  .ch.is-demo .ch__ghost,
  .ch.is-demo .ch__send,
  .ch.is-demo .ch__dot { animation: none !important; }
  .ch.is-demo .ch__field { border-color: rgba($color, .62) !important; box-shadow: 0 0 0 4px rgba($color, .34) !important; }
  .ch.is-demo .ch__ghost { opacity: 1 !important; }
  .ch__field, .ch__send, .ch__dot, .ch__btn { transition: none !important; }
}

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);
}

.ch {
  box-sizing: border-box;
  width: min(100%, 400px);
}

.ch__field {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 8px 8px 16px;
  border: 1px solid rgba(255, 247, 230, 0.18);
  border-radius: 999px;
  background: rgba(255, 247, 230, 0.08);
  box-shadow: 0 0 0 0 rgba(185, 160, 255, 0);
  transition: box-shadow 300ms ease-out, border-color 300ms ease-out;
}

.ch__field:focus-within {
  border-color: rgba(185, 160, 255, 0.62);
  box-shadow: 0 0 0 4px rgba(185, 160, 255, 0.34);
}

.ch__lead {
  display: inline-flex;
  width: 16px;
  height: 16px;
  flex: 0 0 auto;
  color: rgba(255, 247, 230, 0.62);
}

.ch__lead svg {
  width: 100%;
  height: 100%;
}

.ch__box {
  position: relative;
  display: block;
  flex: 1 1 auto;
  min-width: 0;
}

.ch__input {
  display: block;
  width: 100%;
  border: 0;
  background: none;
  padding: 0;
  font-family: inherit;
  font-weight: 600;
  font-size: clamp(10px, 2.9vw, 12px);
  line-height: 1.6;
  color: #fff7e6;
}

.ch__input:focus {
  outline: none;
}

.ch__input::placeholder {
  color: rgba(255, 247, 230, 0.62);
  opacity: 1;
}

.ch__ghost {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  opacity: 0;
  font-weight: 600;
  font-size: clamp(10px, 2.9vw, 12px);
  line-height: 1.6;
  color: #fff7e6;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  pointer-events: none;
}

.ch.is-demo .ch__input::placeholder {
  color: transparent;
}

.ch__send {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  flex: 0 0 auto;
  border: 0;
  border-radius: 50%;
  cursor: pointer;
  background: #fff7e6;
  color: #17141a;
  transition: transform 140ms ease-out;
}

.ch__ico {
  display: inline-flex;
  width: 15px;
  height: 15px;
}

.ch__ico svg {
  width: 100%;
  height: 100%;
}

.ch__dot {
  position: absolute;
  right: 5px;
  top: 5px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  opacity: 0.6;
  background: radial-gradient(circle at 50% 50%, #6ec8ff 0%, #2f6df6 70%);
  transform-origin: 50% 50%;
  transition: transform 140ms ease-out, opacity 140ms ease-out;
}

.ch__send:active {
  transform: translateY(1px);
}

.ch__send:active .ch__dot {
  transform: scale(1.55);
  opacity: 1;
}

.ch__send:focus-visible {
  outline: 2px solid rgba(185, 160, 255, 0.8);
  outline-offset: 2px;
}

.ch__row {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}

.ch__btn {
  flex: 1 1 0;
  padding: 12px 8px;
  border: 0;
  border-radius: 12px;
  cursor: pointer;
  font-family: inherit;
  font-weight: 800;
  font-size: clamp(10px, 2.9vw, 12px);
  line-height: 1;
  transition: transform 220ms ease-out, box-shadow 220ms ease-out;
}

.ch__btn--solid {
  background: #fff7e6;
  color: #17141a;
  box-shadow: 0 6px 12px rgba(23, 20, 26, 0.32);
}

.ch__btn--quiet {
  background: rgba(255, 247, 230, 0.12);
  color: #fff7e6;
}

.ch__btn:hover,
.ch__btn:focus-visible {
  transform: translateY(-1px);
}

.ch__btn--solid:hover,
.ch__btn--solid:focus-visible {
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
}

.ch__btn:active {
  transform: translateY(0);
}

.ch__hint {
  margin: 12px 0 0;
  text-align: center;
  font-weight: 600;
  font-size: clamp(8px, 2.4vw, 9px);
  line-height: 1;
  color: rgba(255, 247, 230, 0.62);
}

.ch.is-demo .ch__field {
  animation-name: chRing;
  animation-duration: 2s;
  animation-timing-function: ease-out;
  animation-iteration-count: infinite;
}

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

.ch.is-demo .ch__send {
  animation-name: chPress;
  animation-duration: 2s;
  animation-timing-function: ease-out;
  animation-iteration-count: infinite;
}

.ch.is-demo .ch__dot {
  animation-name: chDot;
  animation-duration: 2s;
  animation-timing-function: ease-out;
  animation-iteration-count: infinite;
}

@keyframes chRing {
  0%, 6% {
    border-color: rgba(255, 247, 230, 0.18);
    box-shadow: 0 0 0 0 rgba(185, 160, 255, 0);
  }
  30%, 66% {
    border-color: rgba(185, 160, 255, 0.62);
    box-shadow: 0 0 0 4px rgba(185, 160, 255, 0.34);
  }
  86%, 100% {
    border-color: rgba(255, 247, 230, 0.18);
    box-shadow: 0 0 0 0 rgba(185, 160, 255, 0);
  }
}
@keyframes chGhost {
  0% {
    opacity: 0;
  }
  12% {
    opacity: 1;
  }
  86% {
    opacity: 0;
  }
  100% {
    opacity: 0;
  }
}
@keyframes chPress {
  0%, 62% {
    transform: translateY(0);
  }
  66%, 74% {
    transform: translateY(1px);
  }
  78%, 100% {
    transform: translateY(0);
  }
}
@keyframes chDot {
  0%, 62% {
    transform: scale(1);
    opacity: 0.6;
  }
  66%, 74% {
    transform: scale(1.55);
    opacity: 1;
  }
  78%, 100% {
    transform: scale(1);
    opacity: 0.6;
  }
}
@media (max-width: 340px), (max-height: 220px) {
  .ch__field {
    padding: 4px 4px 4px 12px;
  }
  .ch__lead {
    width: 14px;
    height: 14px;
  }
  .ch__input, .ch__ghost {
    font-size: 10px;
  }
  .ch__send {
    width: 26px;
    height: 26px;
  }
  .ch__ico {
    width: 13px;
    height: 13px;
  }
  .ch__row {
    margin-top: 8px;
  }
  .ch__btn {
    padding: 8px;
    font-size: 10px;
  }
  .ch__hint {
    margin-top: 8px;
    font-size: 7px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .ch.is-demo .ch__field,
  .ch.is-demo .ch__ghost,
  .ch.is-demo .ch__send,
  .ch.is-demo .ch__dot {
    animation: none !important;
  }
  .ch.is-demo .ch__field {
    border-color: rgba(185, 160, 255, 0.62) !important;
    box-shadow: 0 0 0 4px rgba(185, 160, 255, 0.34) !important;
  }
  .ch.is-demo .ch__ghost {
    opacity: 1 !important;
  }
  .ch__field, .ch__send, .ch__dot, .ch__btn {
    transition: none !important;
  }
}

// 사람이 손을 대면 미리보기 루프를 끄고 진짜 포커스·누름에 넘긴다.
// 포커스를 코드로 강제하지 않는다 — iframe 안에서 강제 포커스는 부모 페이지를 끌어당긴다 (BD18)
var chat = document.getElementById('ch');
var input = document.getElementById('chInput');
var send = document.getElementById('chSend');
function stopPreview() { chat.classList.remove('is-demo'); }
input.addEventListener('focus', stopPreview);
input.addEventListener('pointerdown', stopPreview);
send.addEventListener('pointerdown', stopPreview);
send.addEventListener('focus', stopPreview);

import { useState } from "react";
import styles from "./ButtonsInputsOrb.module.scss";

export type ButtonsInputsOrbProps = {
  /** 묻고 → 보내고 → 돌아오는 한 바퀴 */
  duration?: string;
  /** 빛 무리가 번지는 이징 */
  easing?: string;
  /** 빛 무리 색 — --ringColor 로 내려간다 */
  color?: string;
};

type Loop = {
  animationName: string;
  animationDuration: string;
  animationTimingFunction: string;
  animationIterationCount: string;
};

export default function ButtonsInputsOrb({
  duration = "2s",
  easing = "ease-out",
  color = "#b9a0ff",
}: ButtonsInputsOrbProps) {
  // 사람이 손을 대면 미리보기 루프를 끈다. 포커스를 코드로 강제하지 않는다 —
  // iframe 안에서 강제 포커스는 부모 페이지를 끌어당긴다 (BD18)
  const [preview, setPreview] = useState(true);
  const [text, setText] = useState("");
  const stopPreview = () => { setPreview(false); };

  const loop = (name: string, timing: string): Loop | undefined =>
    preview ? {
      animationName: name,
      animationDuration: duration,
      animationTimingFunction: timing,
      animationIterationCount: "infinite",
    } : undefined;

  return (
    <main className={styles.stage}>
      <div className={`${styles.ch} ${preview ? styles.isDemo : ""}`} style={{ "--ringColor": color }}>
        <div className={styles.field} style={loop("chRing", easing)}>
          <span className={styles.lead} aria-hidden="true"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 256 256" fill="currentColor"><path d="M224,128A96,96,0,0,1,79.93,211.11h0L42.54,223.58a8,8,0,0,1-10.12-10.12l12.47-37.39h0A96,96,0,1,1,224,128Z" opacity="0.2"/><path d="M128,24A104,104,0,0,0,36.18,176.88L24.83,210.93a16,16,0,0,0,20.24,20.24l34.05-11.35A104,104,0,1,0,128,24Zm0,192a87.87,87.87,0,0,1-44.06-11.81,8,8,0,0,0-4-1.08,7.85,7.85,0,0,0-2.53.42L40,216,52.47,178.6a8,8,0,0,0-.66-6.54A88,88,0,1,1,128,216Zm12-88a12,12,0,1,1-12-12A12,12,0,0,1,140,128Zm-44,0a12,12,0,1,1-12-12A12,12,0,0,1,96,128Zm88,0a12,12,0,1,1-12-12A12,12,0,0,1,184,128Z"/></svg></span>
          <span className={styles.box}>
            <input
              className={styles.input}
              type="text"
              placeholder="무엇이든 물어보세요"
              aria-label="AI에게 물어볼 내용"
              value={text}
              onChange={(e: { target: { value: string } }) => { setText(e.target.value); }}
              onFocus={stopPreview}
              onPointerDown={stopPreview}
            />
            {/* 미리보기용 고스트 글자. 보일 때는 placeholder 가 투명해진다 */}
            <span className={styles.ghost} aria-hidden="true" style={loop("chGhost", "steps(1, end)")}>
              이 랜딩의 전환율을 올릴 방법은?
            </span>
          </span>
          <button
            type="button"
            className={styles.send}
            aria-label="보내기"
            style={loop("chPress", easing)}
            onPointerDown={stopPreview}
            onFocus={stopPreview}
          >
            <span className={styles.dot} aria-hidden="true" style={loop("chDot", easing)} />
            <span className={styles.ico} aria-hidden="true"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 256 256" fill="currentColor"><path d="M223.69,42.18l-58.22,192a8,8,0,0,1-14.92,1.25L108,148,20.58,105.45a8,8,0,0,1,1.25-14.92l192-58.22A8,8,0,0,1,223.69,42.18Z" opacity="0.2"/><path d="M227.32,28.68a16,16,0,0,0-15.66-4.08l-.15,0L19.57,82.84a16,16,0,0,0-2.49,29.8L102,154l41.3,84.87A15.86,15.86,0,0,0,157.74,248q.69,0,1.38-.06a15.88,15.88,0,0,0,14-11.51l58.2-191.94c0-.05,0-.1,0-.15A16,16,0,0,0,227.32,28.68ZM157.83,231.85l-.05.14,0-.07-40.06-82.3,48-48a8,8,0,0,0-11.31-11.31l-48,48L24.08,98.25l-.07,0,.14,0L216,40Z"/></svg></span>
          </button>
        </div>
        <div className={styles.row}>
          <button type="button" className={`${styles.btn} ${styles.btnSolid}`} onClick={stopPreview}>답변 받기</button>
          <button type="button" className={`${styles.btn} ${styles.btnQuiet}`} onClick={stopPreview}>예시 프롬프트</button>
        </div>
        <p className={styles.hint}>답변은 보통 2초 안에 옵니다</p>
      </div>
    </main>
  );
}