05Đuôi mũi tên chỉ hướng

<main class="stage">
  <div class="tip-wrap">
    <span class="field-icon" aria-describedby="tip05">?</span>
    <span class="tooltip is-demo" role="tooltip" id="tip05">Nhập từ 8 ký tự trở lên</span>
  </div>
</main>

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

$duration: $dur-loop;                              // 숨김→표시→숨김 한 주기
$easing: $ease-out;
$color: $subject-cream;                            // 아이콘·말풍선 색

@include stage($stage-ink);

.tip-wrap { position: relative; }

.field-icon {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: $color;
  color: $stage-ink;
  font-weight: 700;
  font-size: 15px;
  line-height: 1;
  font-family: inherit;
}

.tooltip {
  position: absolute;
  bottom: calc(100% + 14px);                       // 화살표 8px + 여유 6px
  left: 50%;
  transform-origin: bottom center; // 규칙8: 화살표(아래변 중심) 축 — 흔들림의 회전 중심
  transform: translate(-50%, 4px);
  opacity: 0;
  background: $color;
  color: $stage-ink;
  padding: 8px 14px;
  border-radius: $r-control;
  font-size: clamp(12px, 3.4vw, 14px);
  white-space: nowrap;
  pointer-events: none;

  &::after {                                        // 꼬리: clip-path 로 삼각형만 남긴다
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    width: 14px;
    height: 8px;
    background: $color;
    clip-path: polygon(50% 100%, 0 0, 100% 0);
  }
}

.tooltip.is-demo {
  animation: tip-loop $duration $easing infinite;
}

// 등장 스프링 한 겹 — 스케일 .85 → 1.12 오버슛 → 감쇠 반동, 회전은 화살표 축으로 2.6° → -1.5° → .6° 감쇠
@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) rotate(0deg); }
}

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;
}

.field-icon {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: #fff7e6;
  color: #17141a;
  font-weight: 700;
  font-size: 15px;
  line-height: 1;
  font-family: inherit;
}

.tooltip {
  position: absolute;
  bottom: calc(100% + 14px);
  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::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  width: 14px;
  height: 8px;
  background: #fff7e6;
  clip-path: polygon(50% 100%, 0 0, 100% 0);
}

.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) rotate(0deg);
  }
}

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

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

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

export default function ArrowTooltip({
  text,
  duration = 200,
  easing = "ease-out",
  color = "#fff7e6",
}: ArrowTooltipProps) {
  const [open, setOpen] = useState(false);
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <span className={styles.wrap} style={vars}>
      <span
        className={styles.icon}
        tabIndex={0}
        aria-describedby="arrow-tooltip"
        onMouseEnter={() => setOpen(true)}
        onMouseLeave={() => setOpen(false)}
        onFocus={() => setOpen(true)}
        onBlur={() => setOpen(false)}
      >
        ?
      </span>
      <span id="arrow-tooltip" role="tooltip" className={styles.tooltip} data-open={open}>
        {text}
      </span>
    </span>
  );
}