01Inbox-zero floating card

<main class="stage">
  <section class="ez is-demo" aria-labelledby="ez-t">
    <div class="ez__art">
      <span class="ez__icon" aria-hidden="true"><svg viewBox="0 0 256 256" width="1em" height="1em"><g fill="currentColor"><path d="M216 48v112h-36.69a8 8 0 0 0-5.66 2.34l-19.31 19.32a8 8 0 0 1-5.66 2.34h-41.37a8 8 0 0 1-5.66-2.34l-19.31-19.32a8 8 0 0 0-5.66-2.34H40V48a8 8 0 0 1 8-8h160a8 8 0 0 1 8 8" opacity=".2"/><path d="M208 32H48a16 16 0 0 0-16 16v160a16 16 0 0 0 16 16h160a16 16 0 0 0 16-16V48a16 16 0 0 0-16-16m0 16v104h-28.7a15.86 15.86 0 0 0-11.3 4.69L148.69 176h-41.38L88 156.68A15.9 15.9 0 0 0 76.69 152H48V48Zm0 160H48v-40h28.69L96 187.32a15.9 15.9 0 0 0 11.31 4.68h41.38a15.86 15.86 0 0 0 11.31-4.69L179.31 168H208z"/></g></svg></span>
      <span class="ez__shadow" aria-hidden="true"></span>
    </div>
    <h2 class="ez__title" id="ez-t">Your inbox is empty</h2>
    <p class="ez__sub" id="ez-s" data-busy="Checking" data-done="0 unread · checked {n}x" aria-live="polite">0 unread messages</p>
    <button class="ez__btn" type="button" id="ez-b">Refresh</button>
  </section>
</main>

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

$duration: $dur-loop;
$easing: ease-in-out;
$color: $subject-cream;

@include stage($stage-ink);

.ez {
  box-sizing: border-box;
  width: min(248px, 86vw);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: $sp-2;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  text-align: center;
  color: $color;
}

.ez__art {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: $sp-1;
}
.ez__icon {
  display: block;
  font-size: clamp(40px, 13vw, 56px);
  line-height: 0;
  color: $color;
}
.ez__shadow {
  display: block;
  width: 36px;
  height: 6px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .18);
}

.ez__title {
  margin: 0;
  font-size: clamp(12px, 4vw, 14px);
  line-height: 1.3;
  font-weight: 800;
}
.ez__sub {
  margin: 0;
  min-height: 14px;
  font-size: 11px;
  line-height: 14px;
  font-weight: 500;
  color: rgba(255, 247, 230, .62);
}
.ez__btn {
  height: 28px;
  margin: 0;
  padding: 0 $sp-4;
  border: 1px solid rgba(255, 255, 255, .2);
  border-radius: $r-pill;
  background: rgba(255, 255, 255, .08);
  color: $color;
  font-family: inherit;
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  transition: background $dur-quick $ease-out;
}
.ez__btn:hover { background: rgba(255, 255, 255, .16); }
.ez__btn:disabled { opacity: .5; cursor: default; }
.ez__btn:focus-visible { outline: 2px solid $subject-blue; outline-offset: 2px; }

// ── 자동 루프: 떠올랐다 내려앉는다. 0% 와 100% 가 같은 자리라 이어 붙어도 튀지 않는다 ──
.ez.is-demo .ez__icon { animation: ez-float $duration $easing infinite; }
.ez.is-demo .ez__shadow { animation: ez-cast $duration $easing infinite; }
@keyframes ez-float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-14px); }
}
@keyframes ez-cast {
  0%, 100% { transform: scaleX(1); opacity: .18; }
  50%      { transform: scaleX(.68); opacity: .1; }
}

@media (prefers-reduced-motion: reduce) {
  .ez.is-demo .ez__icon,
  .ez.is-demo .ez__shadow { animation: none !important; }
  .ez__btn { transition: none; }
}

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);
}

.ez {
  box-sizing: border-box;
  width: min(248px, 86vw);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  text-align: center;
  color: #fff7e6;
}

.ez__art {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.ez__icon {
  display: block;
  font-size: clamp(40px, 13vw, 56px);
  line-height: 0;
  color: #fff7e6;
}

.ez__shadow {
  display: block;
  width: 36px;
  height: 6px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.18);
}

.ez__title {
  margin: 0;
  font-size: clamp(12px, 4vw, 14px);
  line-height: 1.3;
  font-weight: 800;
}

.ez__sub {
  margin: 0;
  min-height: 14px;
  font-size: 11px;
  line-height: 14px;
  font-weight: 500;
  color: rgba(255, 247, 230, 0.62);
}

.ez__btn {
  height: 28px;
  margin: 0;
  padding: 0 16px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: #fff7e6;
  font-family: inherit;
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  transition: background 220ms ease-out;
}

.ez__btn:hover {
  background: rgba(255, 255, 255, 0.16);
}

.ez__btn:disabled {
  opacity: 0.5;
  cursor: default;
}

.ez__btn:focus-visible {
  outline: 2px solid #2f6df6;
  outline-offset: 2px;
}

.ez.is-demo .ez__icon {
  animation: ez-float 2s ease-in-out infinite;
}

.ez.is-demo .ez__shadow {
  animation: ez-cast 2s ease-in-out infinite;
}

@keyframes ez-float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-14px);
  }
}
@keyframes ez-cast {
  0%, 100% {
    transform: scaleX(1);
    opacity: 0.18;
  }
  50% {
    transform: scaleX(0.68);
    opacity: 0.1;
  }
}
@media (prefers-reduced-motion: reduce) {
  .ez.is-demo .ez__icon,
  .ez.is-demo .ez__shadow {
    animation: none !important;
  }
  .ez__btn {
    transition: none;
  }
}

// 실제 동작: 새로 고침을 누르면 확인 중 상태로 바뀌었다가 확인 횟수와 함께 다시 빈 상태로 돌아온다.
var card = document.querySelector('.ez');
var btn = document.getElementById('ez-b');
var sub = document.getElementById('ez-s');
var n = 0;
btn.addEventListener('click', function () {
  card.classList.remove('is-demo');
  if (btn.disabled) return;
  btn.disabled = true;
  sub.textContent = sub.dataset.busy;
  window.setTimeout(function () {
    n += 1;
    sub.textContent = sub.dataset.done.replace('{n}', n);
    btn.disabled = false;
  }, 700);
});

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

export type InboxZeroCardProps = {
  title?: string;
  idle?: string;
  busy?: string;
  done?: string;
  action?: string;
  duration?: number;
  easing?: string;
  color?: string;
};

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

export default function InboxZeroCard({
  title = "Your inbox is empty",
  idle = "0 unread messages",
  busy = "Checking",
  done = "0 unread · checked {n}x",
  action = "Refresh",
  duration = 2000,
  easing = "ease-in-out",
  color = "#fff7e6",
}: InboxZeroCardProps) {
  const [sub, setSub] = useState(idle);
  const [loop, setLoop] = useState(true);
  const [busyNow, setBusyNow] = useState(false);
  const [count, setCount] = useState(0);
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  function refresh() {
    if (busyNow) return;
    setLoop(false);
    setBusyNow(true);
    setSub(busy);
    window.setTimeout(() => {
      const n = count + 1;
      setCount(n);
      setSub(done.replace("{n}", String(n)));
      setBusyNow(false);
    }, 700);
  }

  return (
    <section className={`${styles.ez} ${loop ? styles.isDemo : ""}`} style={vars}>
      <div className={styles.art}>
        <span className={styles.icon} aria-hidden="true">
          <svg viewBox="0 0 256 256" width="1em" height="1em">
            <g fill="currentColor">
              <path d="M216 48v112h-36.69a8 8 0 0 0-5.66 2.34l-19.31 19.32a8 8 0 0 1-5.66 2.34h-41.37a8 8 0 0 1-5.66-2.34l-19.31-19.32a8 8 0 0 0-5.66-2.34H40V48a8 8 0 0 1 8-8h160a8 8 0 0 1 8 8" opacity=".2" />
              <path d="M208 32H48a16 16 0 0 0-16 16v160a16 16 0 0 0 16 16h160a16 16 0 0 0 16-16V48a16 16 0 0 0-16-16m0 16v104h-28.7a15.86 15.86 0 0 0-11.3 4.69L148.69 176h-41.38L88 156.68A15.9 15.9 0 0 0 76.69 152H48V48Zm0 160H48v-40h28.69L96 187.32a15.9 15.9 0 0 0 11.31 4.68h41.38a15.86 15.86 0 0 0 11.31-4.69L179.31 168H208z" />
            </g>
          </svg>
        </span>
        <span className={styles.shadow} aria-hidden="true" />
      </div>
      <h2 className={styles.title}>{title}</h2>
      <p className={styles.sub} aria-live="polite">{sub}</p>
      <button className={styles.btn} type="button" onClick={refresh} disabled={busyNow}>{action}</button>
    </section>
  );
}