09이중선 크레용 버튼·인풋

<main class="stage">
  <svg width="0" height="0" style="position:absolute" aria-hidden="true" focusable="false">
    <filter id="rough9" x="-40%" y="-40%" width="180%" height="180%">
      <feTurbulence type="fractalNoise" baseFrequency="0.05 0.07" numOctaves="2" seed="51" result="n"/>
      <feDisplacementMap in="SourceGraphic" in2="n" scale="5" xChannelSelector="R" yChannelSelector="G"/>
    </filter>
  </svg>
  <form class="formcrayon">
    <label class="formcrayon__field">
      <span class="formcrayon__label">이름</span>
      <span class="formcrayon__input-wrap">
        <svg class="formcrayon__ring" viewBox="0 0 100 40" preserveAspectRatio="none" aria-hidden="true">
          <rect x="3" y="3" width="94" height="34" rx="10" class="formcrayon__ring-rect" />
        </svg>
        <input class="formcrayon__input" type="text" placeholder="이름을 적어보세요" readonly>
      </span>
    </label>
    <span class="formcrayon__btn-wrap">
      <svg class="formcrayon__btn-frame" viewBox="0 0 110 40" preserveAspectRatio="none" aria-hidden="true">
        <rect x="5" y="5" width="100" height="30" rx="15" class="formcrayon__btn-rect formcrayon__btn-rect--a" />
        <rect x="3" y="3" width="100" height="30" rx="15" class="formcrayon__btn-rect formcrayon__btn-rect--b" />
      </svg>
      <button class="formcrayon__btn" type="button">저장하기</button>
    </span>
  </form>
</main>

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

$duration: $dur-loop;       // 이중선이 한 번 어긋났다 돌아오는 주기
$easing:   $ease-spring;    // 어긋남 곡선
$color:    $stage-ink;      // 글자 색 기본값(토큰) — 아래 크레용 잉크로 덮는다

$crayon-paper:  #fff8ef;
$crayon-ink:    #33261c;
$crayon-red:    #dbb6b7;
$crayon-yellow: #d1c5a2;
$crayon-blue:   #9cb8ce;
$crayon-green:  #6dbe6d;
$crayon-purple: #cbbfe0;

@include stage($crayon-paper);

.formcrayon {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: $sp-4;
  width: clamp(210px, 74vw, 260px);
}
.formcrayon__field {
  display: flex;
  flex-direction: column;
  gap: $sp-1;
  width: 100%;
}
.formcrayon__label {
  color: $crayon-ink;
  font-weight: 700;
  font-size: 11px;
}
.formcrayon__input-wrap {
  position: relative;
  display: block;
}
.formcrayon__ring {
  position: absolute;
  inset: -8px;
  width: calc(100% + 16px);
  height: calc(100% + 16px);
  pointer-events: none;
  filter: url(#rough9);
}
.formcrayon__ring-rect {
  fill: none;
  stroke: $crayon-blue;
  stroke-width: 3;
  stroke-linecap: round;
  animation: ringBloom $duration $easing infinite;
}
.formcrayon__input {
  position: relative;
  box-sizing: border-box;
  width: 100%;
  border: 2px solid $crayon-ink;
  border-radius: $r-control;
  background: $stage-paper;
  color: $crayon-ink;
  padding: $sp-2 $sp-3;
  font-weight: 500;
  font-size: 12px;
}
.formcrayon__input:focus-visible {
  outline: 3px solid $crayon-blue;
  outline-offset: 2px;
}
.formcrayon__btn-wrap {
  position: relative;
  display: inline-block;
}
.formcrayon__btn-frame {
  position: absolute;
  inset: -6px;
  width: calc(100% + 12px);
  height: calc(100% + 12px);
  pointer-events: none;
  filter: url(#rough9);
}
.formcrayon__btn-rect {
  fill: none;
  stroke-width: 2.6;
}
.formcrayon__btn-rect--a { stroke: $crayon-red; animation: lineShiftA $duration $easing infinite; }
.formcrayon__btn-rect--b { stroke: $crayon-blue; opacity: .85; animation: lineShiftB $duration $easing infinite; }
.formcrayon__btn {
  position: relative;
  border: 0;
  border-radius: $r-pill;
  background: $crayon-yellow;
  color: $crayon-ink;
  padding: $sp-3 $sp-6;
  font-weight: 700;
  font-size: 13px;
}
.formcrayon__btn:focus-visible {
  outline: 3px solid $crayon-ink;
  outline-offset: 2px;
}

// 데모: 인풋은 손으로 두른 동그라미가 번지듯 피어났다 사라지고, 버튼은 두 선이 살짝 어긋났다 돌아온다
@keyframes ringBloom {
  0%   { opacity: 0; transform: scale(.9); }
  35%  { opacity: 1; transform: scale(1); }
  70%  { opacity: 1; transform: scale(1.03); }
  100% { opacity: 0; transform: scale(1.06); }
}
@keyframes lineShiftA {
  0%, 100% { transform: translate(0, 0); }
  50%      { transform: translate(-2px, 1px); }
}
@keyframes lineShiftB {
  0%, 100% { transform: translate(0, 0); }
  50%      { transform: translate(2px, -1px); }
}

@media (max-width: 340px), (max-height: 220px) {
  .formcrayon { gap: $sp-2; }
  .formcrayon__btn { padding: $sp-2 $sp-4; }
}

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

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

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #fff8ef;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.formcrayon {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
  width: clamp(210px, 74vw, 260px);
}

.formcrayon__field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 100%;
}

.formcrayon__label {
  color: #33261c;
  font-weight: 700;
  font-size: 11px;
}

.formcrayon__input-wrap {
  position: relative;
  display: block;
}

.formcrayon__ring {
  position: absolute;
  inset: -8px;
  width: calc(100% + 16px);
  height: calc(100% + 16px);
  pointer-events: none;
  filter: url(#rough9);
}

.formcrayon__ring-rect {
  fill: none;
  stroke: #9cb8ce;
  stroke-width: 3;
  stroke-linecap: round;
  animation: ringBloom 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

.formcrayon__input {
  position: relative;
  box-sizing: border-box;
  width: 100%;
  border: 2px solid #33261c;
  border-radius: 12px;
  background: #ffffff;
  color: #33261c;
  padding: 8px 12px;
  font-weight: 500;
  font-size: 12px;
}

.formcrayon__input:focus-visible {
  outline: 3px solid #9cb8ce;
  outline-offset: 2px;
}

.formcrayon__btn-wrap {
  position: relative;
  display: inline-block;
}

.formcrayon__btn-frame {
  position: absolute;
  inset: -6px;
  width: calc(100% + 12px);
  height: calc(100% + 12px);
  pointer-events: none;
  filter: url(#rough9);
}

.formcrayon__btn-rect {
  fill: none;
  stroke-width: 2.6;
}

.formcrayon__btn-rect--a {
  stroke: #dbb6b7;
  animation: lineShiftA 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

.formcrayon__btn-rect--b {
  stroke: #9cb8ce;
  opacity: 0.85;
  animation: lineShiftB 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

.formcrayon__btn {
  position: relative;
  border: 0;
  border-radius: 999px;
  background: #d1c5a2;
  color: #33261c;
  padding: 12px 24px;
  font-weight: 700;
  font-size: 13px;
}

.formcrayon__btn:focus-visible {
  outline: 3px solid #33261c;
  outline-offset: 2px;
}

@keyframes ringBloom {
  0% {
    opacity: 0;
    transform: scale(0.9);
  }
  35% {
    opacity: 1;
    transform: scale(1);
  }
  70% {
    opacity: 1;
    transform: scale(1.03);
  }
  100% {
    opacity: 0;
    transform: scale(1.06);
  }
}
@keyframes lineShiftA {
  0%, 100% {
    transform: translate(0, 0);
  }
  50% {
    transform: translate(-2px, 1px);
  }
}
@keyframes lineShiftB {
  0%, 100% {
    transform: translate(0, 0);
  }
  50% {
    transform: translate(2px, -1px);
  }
}
@media (max-width: 340px), (max-height: 220px) {
  .formcrayon {
    gap: 8px;
  }
  .formcrayon__btn {
    padding: 8px 16px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .formcrayon__ring-rect, .formcrayon__btn-rect {
    animation: none !important;
    transform: none;
  }
  .formcrayon__ring-rect {
    opacity: 0.8;
  }
}

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

export type ButtonsInputsCrayonProps = {
  label?: string;
  placeholder?: string;
  cta?: string;
  duration?: number;
  easing?: string;
  color?: string;
};

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

export default function ButtonsInputsCrayon({
  label = "이름",
  placeholder = "이름을 적어보세요",
  cta = "저장하기",
  duration = 2000,
  easing = "cubic-bezier(.2,.8,.2,1)",
  color = "#4fa3e3",
}: ButtonsInputsCrayonProps) {
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <form className={styles.form} style={vars}>
      <svg width="0" height="0" style={{ position: "absolute" }} aria-hidden="true" focusable="false">
        <filter id="bi-rough" x="-40%" y="-40%" width="180%" height="180%">
          <feTurbulence type="fractalNoise" baseFrequency={0.06} numOctaves={2} seed={51} result="n" />
          <feDisplacementMap in="SourceGraphic" in2="n" scale={5} xChannelSelector="R" yChannelSelector="G" />
        </filter>
      </svg>
      <label className={styles.field}>
        <span className={styles.label}>{label}</span>
        <span className={styles.inputWrap}>
          <svg className={styles.ring} viewBox="0 0 100 40" preserveAspectRatio="none" aria-hidden="true">
            <rect x={3} y={3} width={94} height={34} rx={10} className={styles.ringRect} />
          </svg>
          <input className={styles.input} type="text" placeholder={placeholder} />
        </span>
      </label>
      <span className={styles.btnWrap}>
        <svg className={styles.btnFrame} viewBox="0 0 110 40" preserveAspectRatio="none" aria-hidden="true">
          <rect x={5} y={5} width={100} height={30} rx={15} className={`${styles.btnRect} ${styles.btnRectA}`} />
          <rect x={3} y={3} width={100} height={30} rx={15} className={`${styles.btnRect} ${styles.btnRectB}`} />
        </svg>
        <button type="button" className={styles.btn}>{cta}</button>
      </span>
    </form>
  );
}