08ウェーブのフッター

<main class="stage">
  <footer class="footercitrus">
    <span class="footercitrus__wave" aria-hidden="true"></span>
    <div class="footercitrus__cols">
      <div class="footercitrus__col footercitrus__col--org">
        <p class="footercitrus__head">製品</p>
        <p class="footercitrus__link">機能</p>
      </div>
      <div class="footercitrus__col footercitrus__col--grp">
        <p class="footercitrus__head">会社</p>
        <p class="footercitrus__link">紹介</p>
      </div>
      <div class="footercitrus__col footercitrus__col--lem">
        <p class="footercitrus__head">ヘルプ</p>
        <p class="footercitrus__link">ガイド</p>
      </div>
    </div>
    <p class="footercitrus__copy">
      <span class="footercitrus__spark" aria-hidden="true">✦</span>
      スクイーズ・爽やかな一日
      <span class="footercitrus__spark footercitrus__spark--b" aria-hidden="true">✦</span>
    </p>
  </footer>
</main>

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

$duration: $dur-loop;       // 방울이 한 번 반짝이는 주기
$easing: $ease-out;
$color: $stage-ink;

$citrus-cream:      #fffaf0;
$citrus-orange-deep:  #bd967a;
$citrus-lime:        #c4ce9c;
$citrus-grapefruit:  #ebd6da;
$citrus-lemon:       #dfd8be;
$citrus-ink:         #204a17;

// 푸터 패널 색 — 크림보다 살짝 진한 라임 우유크림
$panel: mix($citrus-lime, $stage-paper, 18%);

@include stage($citrus-cream);

.footercitrus {
  position: relative;
  box-sizing: border-box;
  width: clamp(300px, 94vw, 460px);
  padding: $sp-4 $sp-3 $sp-3;
  border-radius: $r-card;
  background: $panel;
  box-shadow: 0 -6px 20px rgba($citrus-lime, .4);
}
// 웨이브 가장자리 — 물결 하나하나를 요소로 그리지 않고 배경 반복 하나로 그린다.
// 각 타일(30×15px) 아래변 중심에 반원을 그리면 윗반원만 남아 물결치는 가장자리가 된다
.footercitrus__wave {
  position: absolute;
  top: calc($sp-3 * -1);
  left: 0;
  width: 100%;
  height: $sp-3;
  background-image: radial-gradient(circle at 50% 100%, $panel 0 64%, transparent 66%);
  background-size: 30px 15px;
  background-repeat: repeat-x;
  background-position: bottom center;
}
.footercitrus__cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(clamp(84px, 26vw, 120px), 1fr));
  gap: $sp-2;
}
.footercitrus__col {
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  gap: $sp-1;
  padding: $sp-3;
  border-radius: $r-control;
}
.footercitrus__col--org { background: mix($citrus-orange-deep, $stage-paper, 30%); animation: colRipple $duration $easing infinite; }
.footercitrus__col--grp { background: mix($citrus-grapefruit, $stage-paper, 45%); animation: colRipple $duration $easing infinite; animation-delay: calc($duration / -3); }
.footercitrus__col--lem { background: mix($citrus-lemon, $stage-paper, 45%); animation: colRipple $duration $easing infinite; animation-delay: calc($duration / -3 * 2); }
.footercitrus__head {
  margin: 0;
  color: $citrus-ink;
  font-weight: 700; font-size: clamp(10px, 2.6vw, 12px); line-height: 1;
  font-family: inherit;
  letter-spacing: .06em;
}
.footercitrus__link {
  margin: 0;
  color: $citrus-ink;
  font-weight: 500; font-size: clamp(11px, 2.8vw, 13px); line-height: 1.5;
  font-family: inherit;
}
.footercitrus__copy {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: $sp-2;
  margin: $sp-3 0 0;
  color: rgba($citrus-ink, .78);
  font-weight: 500; font-size: clamp(10px, 2.6vw, 12px); line-height: 1;
  font-family: inherit;
}
.footercitrus__spark {
  color: $citrus-orange-deep;
  animation: dropTwinkle $duration $easing infinite;
}
.footercitrus__spark--b {
  animation-delay: calc($duration / -2);
  color: mix($citrus-lime, $citrus-ink, 70%);
}

// 데모: 세 칸이 순서대로 살짝 들썩이는 물결을 만들고, 방울 두 개는 어긋나게 반짝인다
@keyframes colRipple {
  0%, 40%, 100% { transform: translateY(0); }
  20%           { transform: translateY(-6px); }
}
@keyframes dropTwinkle {
  0%, 100% { opacity: .35; transform: scale(.8) rotate(0deg); }
  50%      { opacity: 1; transform: scale(1.3) rotate(25deg); }
}

// 반응형: 320×200 처럼 세로가 짧은 화면에선 칸 속과 웨이브 번짐을 줄인다(BD9)
@media (max-width: 340px), (max-height: 220px) {
  .footercitrus { padding: $sp-3 $sp-2 $sp-2; }
  .footercitrus__wave { top: calc($sp-2 * -1); height: $sp-2; background-size: 22px 11px; }
  .footercitrus__cols { gap: $sp-1; }
  .footercitrus__col { padding: $sp-2; }
  .footercitrus__link { display: none; }
  .footercitrus__copy { margin-top: $sp-2; font-size: 9px; }
}

@media (prefers-reduced-motion: reduce) {
  .footercitrus__col, .footercitrus__spark { animation: none !important; transform: none; }
  .footercitrus__spark { opacity: .8; }
}

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

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #fffaf0;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.footercitrus {
  position: relative;
  box-sizing: border-box;
  width: clamp(300px, 94vw, 460px);
  padding: 16px 12px 12px;
  border-radius: 16px;
  background: rgb(95.8352941176%, 96.5411764706%, 93.0117647059%);
  box-shadow: 0 -6px 20px rgba(196, 206, 156, 0.4);
}

.footercitrus__wave {
  position: absolute;
  top: -12px;
  left: 0;
  width: 100%;
  height: 12px;
  background-image: radial-gradient(circle at 50% 100%, rgb(95.8352941176%, 96.5411764706%, 93.0117647059%) 0 64%, transparent 66%);
  background-size: 30px 15px;
  background-repeat: repeat-x;
  background-position: bottom center;
}

.footercitrus__cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(clamp(84px, 26vw, 120px), 1fr));
  gap: 8px;
}

.footercitrus__col {
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px;
  border-radius: 12px;
}

.footercitrus__col--org {
  background: rgb(92.2352941176%, 87.6470588235%, 84.3529411765%);
  animation: colRipple 2s ease-out infinite;
}

.footercitrus__col--grp {
  background: rgb(96.4705882353%, 92.7647058824%, 93.4705882353%);
  animation: colRipple 2s ease-out infinite;
  animation-delay: -0.6666666667s;
}

.footercitrus__col--lem {
  background: rgb(94.3529411765%, 93.1176470588%, 88.5294117647%);
  animation: colRipple 2s ease-out infinite;
  animation-delay: -1.3333333333s;
}

.footercitrus__head {
  margin: 0;
  color: #204a17;
  font-weight: 700;
  font-size: clamp(10px, 2.6vw, 12px);
  line-height: 1;
  font-family: inherit;
  letter-spacing: 0.06em;
}

.footercitrus__link {
  margin: 0;
  color: #204a17;
  font-weight: 500;
  font-size: clamp(11px, 2.8vw, 13px);
  line-height: 1.5;
  font-family: inherit;
}

.footercitrus__copy {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: 12px 0 0;
  color: rgba(32, 74, 23, 0.78);
  font-weight: 500;
  font-size: clamp(10px, 2.6vw, 12px);
  line-height: 1;
  font-family: inherit;
}

.footercitrus__spark {
  color: #bd967a;
  animation: dropTwinkle 2s ease-out infinite;
}

.footercitrus__spark--b {
  animation-delay: -1s;
  color: rgb(57.568627451%, 65.2549019608%, 45.5294117647%);
}

@keyframes colRipple {
  0%, 40%, 100% {
    transform: translateY(0);
  }
  20% {
    transform: translateY(-6px);
  }
}
@keyframes dropTwinkle {
  0%, 100% {
    opacity: 0.35;
    transform: scale(0.8) rotate(0deg);
  }
  50% {
    opacity: 1;
    transform: scale(1.3) rotate(25deg);
  }
}
@media (max-width: 340px), (max-height: 220px) {
  .footercitrus {
    padding: 12px 8px 8px;
  }
  .footercitrus__wave {
    top: -8px;
    height: 8px;
    background-size: 22px 11px;
  }
  .footercitrus__cols {
    gap: 4px;
  }
  .footercitrus__col {
    padding: 8px;
  }
  .footercitrus__link {
    display: none;
  }
  .footercitrus__copy {
    margin-top: 8px;
    font-size: 9px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .footercitrus__col, .footercitrus__spark {
    animation: none !important;
    transform: none;
  }
  .footercitrus__spark {
    opacity: 0.8;
  }
}

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

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

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

export default function FooterCitrus({
  brand = "스퀴즈 · 상큼한 하루",
  duration = 2000,
  easing = "ease-out",
  color = "#ff6a00",
}: FooterCitrusProps) {
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <footer className={styles.footercitrus} style={vars}>
      <span className={styles.wave} aria-hidden="true" />
      <div className={styles.cols}>
        <div className={`${styles.col} ${styles.colOrg}`}>
          <p className={styles.head}>제품</p>
          <p className={styles.link}>기능</p>
        </div>
        <div className={`${styles.col} ${styles.colGrp}`}>
          <p className={styles.head}>회사</p>
          <p className={styles.link}>소개</p>
        </div>
        <div className={`${styles.col} ${styles.colLem}`}>
          <p className={styles.head}>도움말</p>
          <p className={styles.link}>가이드</p>
        </div>
      </div>
      <p className={styles.copy}>
        <span className={styles.spark} aria-hidden="true">✦</span>
        {brand}
        <span className={`${styles.spark} ${styles.sparkB}`} aria-hidden="true">✦</span>
      </p>
    </footer>
  );
}