01Basic top tooltip

<main class="stage">
  <div class="tip-wrap">
    <button class="info-btn" type="button" aria-describedby="tip01">Help</button>
    <span class="tooltip is-demo" role="tooltip" id="tip01">Members only</span>
  </div>
</main>

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

$duration: $dur-loop;                             // 숨김→표시→숨김 한 주기
$easing: $ease-out;                                // 나타날 땐 빠르게, 사라질 땐 부드럽게
$color: $subject-blue;                             // 트리거 버튼 색

@include stage($stage-ink);

.tip-wrap {
  position: relative;                              // 툴팁 위치의 기준
}

.info-btn {
  border: 0;
  border-radius: $r-pill;
  padding: 12px 22px;
  font-weight: 600;
  font-size: 15px;
  line-height: 1;
  font-family: inherit;
  color: #fff;
  background: $color;
  cursor: pointer;
}

.tooltip {
  position: absolute;
  bottom: calc(100% + 8px);                        // 버튼 바로 위, 8px 간격
  left: 50%;
  transform-origin: bottom center; // 규칙8: 화살표(버튼 쪽 아래변) 축 — 흔들림의 회전 중심
  transform: translate(-50%, 4px);
  opacity: 0;
  background: $subject-cream;
  color: $stage-ink;
  padding: 8px 14px;
  border-radius: $r-control;
  font-size: clamp(12px, 3.4vw, 14px);
  white-space: nowrap;
  pointer-events: none;
}

// 데모: 호버 없이 혼자 표시→숨김을 반복한다
.tooltip.is-demo {
  animation: tip-loop $duration $easing infinite;
}

// 등장 스프링 한 겹 — 스케일은 .85 에서 1.12 로 목표를 지나쳤다가 감쇠 반동(.95 → 1.03)으로 멎고,
// 회전은 화살표 축(아래변 중심)을 중심으로 2.6° → -1.5° → .6° 로 감쇠하며 흔들린다
@keyframes tip-loop {
  0%       { opacity: 0; transform: translate(-50%, 4px) scale(.85) rotate(0deg); }
  12%      { opacity: 1; transform: translate(-50%, 0) scale(1.12) rotate(2.6deg); }
  22%      { opacity: 1; transform: translate(-50%, 0) scale(.95) rotate(-1.5deg); }
  30%      { opacity: 1; transform: translate(-50%, 0) scale(1.03) rotate(.6deg); }
  36%, 55% { opacity: 1; transform: translate(-50%, 0) scale(1) rotate(0deg); }
  80%      { opacity: 0; transform: translate(-50%, 4px) scale(.85) rotate(0deg); }
  100%     { opacity: 0; transform: translate(-50%, 4px) scale(.85) rotate(0deg); }
}

@media (prefers-reduced-motion: reduce) {
  .tooltip.is-demo { animation: none; opacity: 1; transform: translate(-50%, 0) scale(1); }
}

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);
}

.tip-wrap {
  position: relative;
}

.info-btn {
  border: 0;
  border-radius: 999px;
  padding: 12px 22px;
  font-weight: 600;
  font-size: 15px;
  line-height: 1;
  font-family: inherit;
  color: #fff;
  background: #2f6df6;
  cursor: pointer;
}

.tooltip {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform-origin: bottom center;
  transform: translate(-50%, 4px);
  opacity: 0;
  background: #fff7e6;
  color: #17141a;
  padding: 8px 14px;
  border-radius: 12px;
  font-size: clamp(12px, 3.4vw, 14px);
  white-space: nowrap;
  pointer-events: none;
}

.tooltip.is-demo {
  animation: tip-loop 2s ease-out infinite;
}

@keyframes tip-loop {
  0% {
    opacity: 0;
    transform: translate(-50%, 4px) scale(0.85) rotate(0deg);
  }
  12% {
    opacity: 1;
    transform: translate(-50%, 0) scale(1.12) rotate(2.6deg);
  }
  22% {
    opacity: 1;
    transform: translate(-50%, 0) scale(0.95) rotate(-1.5deg);
  }
  30% {
    opacity: 1;
    transform: translate(-50%, 0) scale(1.03) rotate(0.6deg);
  }
  36%, 55% {
    opacity: 1;
    transform: translate(-50%, 0) scale(1) rotate(0deg);
  }
  80% {
    opacity: 0;
    transform: translate(-50%, 4px) scale(0.85) rotate(0deg);
  }
  100% {
    opacity: 0;
    transform: translate(-50%, 4px) scale(0.85) rotate(0deg);
  }
}
@media (prefers-reduced-motion: reduce) {
  .tooltip.is-demo {
    animation: none;
    opacity: 1;
    transform: translate(-50%, 0) scale(1);
  }
}

import { useState } from "react";
import type { CSSProperties, ReactNode } from "react";
import styles from "./TopTooltip.module.scss";

export type TopTooltipProps = {
  /** 버튼 글자 */
  label: ReactNode;
  /** 툴팁 글자 */
  text: string;
  /** 나타나고 사라지는 시간 (기본 200ms) */
  duration?: number;
  /** CSS easing */
  easing?: string;
  /** 버튼 색 */
  color?: string;
};

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

export default function TopTooltip({
  label,
  text,
  duration = 200,
  easing = "ease-out",
  color = "#2f6df6",
}: TopTooltipProps) {
  const [open, setOpen] = useState(false);
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <span className={styles.wrap} style={vars}>
      <button
        type="button"
        className={styles.btn}
        aria-describedby="top-tooltip"
        onMouseEnter={() => setOpen(true)}
        onMouseLeave={() => setOpen(false)}
        onFocus={() => setOpen(true)}
        onBlur={() => setOpen(false)}
      >
        {label}
      </button>
      <span id="top-tooltip" role="tooltip" className={styles.tooltip} data-open={open}>
        {text}
      </span>
    </span>
  );
}