07Torn-edge CTA band

<main class="stage">
  <section class="tornband">
    <div class="tornband__in">
      <p class="tornband__t">Start cutting and pasting today</p>
      <button class="tornband__btn" type="button">
        <span>Get the pieces</span>
        <span class="tornband__ic" aria-hidden="true">
          <svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 256 256"><g fill="currentColor"><path d="m216 128l-72 72V56Z" opacity=".2"/><path d="m221.66 122.34l-72-72A8 8 0 0 0 136 56v64H40a8 8 0 0 0 0 16h96v64a8 8 0 0 0 13.66 5.66l72-72a8 8 0 0 0 0-11.32M152 180.69V75.31L204.69 128Z"/></g></svg>
        </span>
      </button>
    </div>
  </section>
</main>

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

// 페이퍼컷 팔레트
$paper-base:   #fbf6ec;
$paper-sheet:  #ffffff;
$paper-ink:    #2a2320;
$paper-stone:  #5c5048;
$paper-coral:  #b97b71;
$paper-sky:    #6a8db5;
$paper-leaf:   #2b7d5a;
$paper-butter: #d6c9ab;
$paper-edge:   #e7dccb;

$duration: $dur-loop;   // 버튼이 떴다 눌리는 한 주기
$easing: $ease-spring;  // 종이가 바닥에 닿을 때만 탄력
$color: $paper-coral;   // 띠의 색종이 색. 흰 글자 대비 4.93:1

@include stage($paper-base);

.tornband {
  box-sizing: border-box;
  width: clamp(252px, 84vw, 372px);
  padding: $sp-6 $sp-5;
  background: $color;
  // 위아래를 지그재그로 찢어낸 가장자리 — 마스크 세 겹을 겹쳐 만든다 (애니메이션 대상 아님)
  -webkit-mask:
    conic-gradient(from -45deg at bottom, #0000, #000 1deg 89deg, #0000 90deg) bottom / 14px 7px repeat-x,
    conic-gradient(from 135deg at top, #0000, #000 1deg 89deg, #0000 90deg) top / 14px 7px repeat-x,
    linear-gradient(#000 0 0) center / 100% calc(100% - 14px) no-repeat;
  mask:
    conic-gradient(from -45deg at bottom, #0000, #000 1deg 89deg, #0000 90deg) bottom / 14px 7px repeat-x,
    conic-gradient(from 135deg at top, #0000, #000 1deg 89deg, #0000 90deg) top / 14px 7px repeat-x,
    linear-gradient(#000 0 0) center / 100% calc(100% - 14px) no-repeat;
}
.tornband__in {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: $sp-4;
}
.tornband__t {
  margin: 0;
  color: $paper-sheet;
  font-weight: 800; font-size: clamp(15px, 3.6vw, 19px); line-height: 1.25;
  font-family: inherit;
  text-align: center;
}
// 종이 버튼 — 그림자가 두께다. 눌리면 두께가 사라진다
.tornband__btn {
  display: inline-flex;
  align-items: center;
  gap: $sp-2;
  border: 0;
  border-radius: $r-control;
  background: $paper-sheet;
  color: $paper-ink;
  padding: $sp-3 $sp-6;
  font-weight: 800; font-size: 14px; line-height: 1;
  font-family: inherit;
  box-shadow: 0 6px 0 rgba($paper-ink, .3);
  animation: paperPress $duration $easing infinite;
}
.tornband__ic { font-size: 16px; line-height: 1; color: $color; }
.tornband__btn:focus-visible { outline: 3px solid $paper-sheet; outline-offset: 3px; }

// 데모: 버튼이 8px 떠올랐다가 바닥에 붙는다. 그림자 두께가 6px→0 으로 같이 줄어든다
@keyframes paperPress {
  0%, 100% { transform: translateY(-8px); box-shadow: 0 14px 0 rgba($paper-ink, .3); }
  50%      { transform: translateY(0); box-shadow: 0 2px 0 rgba($paper-ink, .3); }
}

@media (max-width: 340px), (max-height: 220px) {
  .tornband { width: 268px; padding: $sp-5 $sp-3; }
  .tornband__in { gap: $sp-3; }
  .tornband__t { font-size: 13px; }
  .tornband__btn { padding: $sp-2 $sp-4; font-size: 12px; }
  .tornband__ic { font-size: 13px; }
}

@media (prefers-reduced-motion: reduce) {
  .tornband__btn { animation: none !important; transform: none; }
}

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

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #fbf6ec;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.tornband {
  box-sizing: border-box;
  width: clamp(252px, 84vw, 372px);
  padding: 24px 20px;
  background: #b97b71;
  -webkit-mask: conic-gradient(from -45deg at bottom, rgba(0, 0, 0, 0), #000 1deg 89deg, rgba(0, 0, 0, 0) 90deg) bottom/14px 7px repeat-x, conic-gradient(from 135deg at top, rgba(0, 0, 0, 0), #000 1deg 89deg, rgba(0, 0, 0, 0) 90deg) top/14px 7px repeat-x, linear-gradient(#000 0 0) center/100% calc(100% - 14px) no-repeat;
  mask: conic-gradient(from -45deg at bottom, rgba(0, 0, 0, 0), #000 1deg 89deg, rgba(0, 0, 0, 0) 90deg) bottom/14px 7px repeat-x, conic-gradient(from 135deg at top, rgba(0, 0, 0, 0), #000 1deg 89deg, rgba(0, 0, 0, 0) 90deg) top/14px 7px repeat-x, linear-gradient(#000 0 0) center/100% calc(100% - 14px) no-repeat;
}

.tornband__in {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.tornband__t {
  margin: 0;
  color: #ffffff;
  font-weight: 800;
  font-size: clamp(15px, 3.6vw, 19px);
  line-height: 1.25;
  font-family: inherit;
  text-align: center;
}

.tornband__btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 0;
  border-radius: 12px;
  background: #ffffff;
  color: #2a2320;
  padding: 12px 24px;
  font-weight: 800;
  font-size: 14px;
  line-height: 1;
  font-family: inherit;
  box-shadow: 0 6px 0 rgba(42, 35, 32, 0.3);
  animation: paperPress 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

.tornband__ic {
  font-size: 16px;
  line-height: 1;
  color: #b97b71;
}

.tornband__btn:focus-visible {
  outline: 3px solid #ffffff;
  outline-offset: 3px;
}

@keyframes paperPress {
  0%, 100% {
    transform: translateY(-8px);
    box-shadow: 0 14px 0 rgba(42, 35, 32, 0.3);
  }
  50% {
    transform: translateY(0);
    box-shadow: 0 2px 0 rgba(42, 35, 32, 0.3);
  }
}
@media (max-width: 340px), (max-height: 220px) {
  .tornband {
    width: 268px;
    padding: 20px 12px;
  }
  .tornband__in {
    gap: 12px;
  }
  .tornband__t {
    font-size: 13px;
  }
  .tornband__btn {
    padding: 8px 16px;
    font-size: 12px;
  }
  .tornband__ic {
    font-size: 13px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .tornband__btn {
    animation: none !important;
    transform: none;
  }
}

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

export type TornBandProps = {
  title?: string;
  cta?: string;
  /** 한 주기(기본 2000ms) */
  duration?: number;
  easing?: string;
  /** 띠의 색종이 색. 흰 글자와 4.5:1 이상이어야 한다 */
  color?: string;
};

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

const ARROW = (
  <svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 256 256"><g fill="currentColor"><path d="m216 128l-72 72V56Z" opacity=".2"/><path d="m221.66 122.34l-72-72A8 8 0 0 0 136 56v64H40a8 8 0 0 0 0 16h96v64a8 8 0 0 0 13.66 5.66l72-72a8 8 0 0 0 0-11.32M152 180.69V75.31L204.69 128Z"/></g></svg>
);

export default function TornBand({
  title = "오늘 오려 붙이세요",
  cta = "부품 받기",
  duration = 2000,
  easing = "cubic-bezier(.2,.8,.2,1)",
  color = "#cc3d26",
}: TornBandProps) {
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <section className={styles.tornband} style={vars}>
      <div className={styles.in}>
        <p className={styles.t}>{title}</p>
        <button className={styles.btn} type="button">
          <span>{cta}</span>
          <span className={styles.ic} aria-hidden="true">{ARROW}</span>
        </button>
      </div>
    </section>
  );
}