09radius 12 필 버튼

<main class="stage">
  <form class="form">
    <label class="form__field is-demo">
      <span class="form__ring" aria-hidden="true"></span>
      <input class="form__input" type="email" placeholder="이메일 주소" readonly>
    </label>
    <button class="form__btn is-demo" type="button">가입하기</button>
  </form>
</main>

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

$duration: $dur-loop;      // 포커스 링과 버튼이 도는 한 주기
$easing: $ease-spring;     // 눌리는 곡선
$color: $subject-blue;     // 포커스 색

@include stage($stage-ink);

.form {
  width: clamp(220px, 76vw, 320px);
  display: flex;
  flex-direction: column;
  gap: clamp(10px, 3vw, 14px);
}
.form__field {
  position: relative;
  display: block;
  border-radius: $r-control;
  background: $subject-cream;
}
.form__ring {
  position: absolute;
  inset: -3px;
  border-radius: calc(#{$r-control} + 3px);
  border: 2px solid $color;
  opacity: 0;
  animation: ringPulse $duration $easing infinite;
}
.form__input {
  width: 100%;
  box-sizing: border-box;
  border: 0;
  border-radius: $r-control;
  background: transparent;
  padding: clamp(11px, 3vw, 13px) clamp(14px, 3.6vw, 16px);
  color: $subject-ink;
  font-weight: 500; font-size: clamp(11px, 2.8vw, 13px); line-height: 1;
}
.form__input::placeholder { color: rgba($subject-ink, .45); }
.form__btn {
  border: 0;
  border-radius: $r-control;
  background: $subject-blue-deep;
  color: $subject-cream;
  padding: clamp(11px, 3vw, 13px);
  font-weight: 700; font-size: clamp(11px, 2.8vw, 13px); line-height: 1;
  animation: btnPress $duration $easing infinite;
}

// 데모: 입력창에 포커스 링이 떴다 사라지고, 이어서 버튼이 한 번 눌린다
@keyframes ringPulse {
  0%, 20%  { opacity: 0; }
  32%, 55% { opacity: 1; }
  68%, 100% { opacity: 0; }
}
@keyframes btnPress {
  0%, 68%   { transform: scale(1); }
  78%       { transform: scale(.96); }
  88%, 100% { transform: scale(1); }
}

@media (prefers-reduced-motion: reduce) {
  .form__ring,
  .form__btn {
    animation: none !important;
    transform: none;
  }
  .form__ring { opacity: 0; }
}

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);
}

.form {
  width: clamp(220px, 76vw, 320px);
  display: flex;
  flex-direction: column;
  gap: clamp(10px, 3vw, 14px);
}

.form__field {
  position: relative;
  display: block;
  border-radius: 12px;
  background: #fff7e6;
}

.form__ring {
  position: absolute;
  inset: -3px;
  border-radius: calc(12px + 3px);
  border: 2px solid #2f6df6;
  opacity: 0;
  animation: ringPulse 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

.form__input {
  width: 100%;
  box-sizing: border-box;
  border: 0;
  border-radius: 12px;
  background: transparent;
  padding: clamp(11px, 3vw, 13px) clamp(14px, 3.6vw, 16px);
  color: #17141a;
  font-weight: 500;
  font-size: clamp(11px, 2.8vw, 13px);
  line-height: 1;
}

.form__input::placeholder {
  color: rgba(23, 20, 26, 0.45);
}

.form__btn {
  border: 0;
  border-radius: 12px;
  background: #0a4fe8;
  color: #fff7e6;
  padding: clamp(11px, 3vw, 13px);
  font-weight: 700;
  font-size: clamp(11px, 2.8vw, 13px);
  line-height: 1;
  animation: btnPress 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

@keyframes ringPulse {
  0%, 20% {
    opacity: 0;
  }
  32%, 55% {
    opacity: 1;
  }
  68%, 100% {
    opacity: 0;
  }
}
@keyframes btnPress {
  0%, 68% {
    transform: scale(1);
  }
  78% {
    transform: scale(0.96);
  }
  88%, 100% {
    transform: scale(1);
  }
}
@media (prefers-reduced-motion: reduce) {
  .form__ring,
  .form__btn {
    animation: none !important;
    transform: none;
  }
  .form__ring {
    opacity: 0;
  }
}

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

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

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

export default function BentoButtonsInputs({
  placeholder = "Email address",
  cta = "Sign up",
  duration = 2000,
  easing = "cubic-bezier(.2,.8,.2,1)",
  color = "#2f6df6",
}: BentoButtonsInputsProps) {
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <form className={styles.form} style={vars}>
      <label className={styles.field}>
        <span className={styles.ring} aria-hidden="true" />
        <input className={styles.input} type="email" placeholder={placeholder} readOnly />
      </label>
      <button type="button" className={styles.btn}>{cta}</button>
    </form>
  );
}