09Selection ring draw-in

<main class="stage">
  <article class="card is-demo" tabindex="0">
    <svg class="ring" viewBox="0 0 160 100" aria-hidden="true">
      <rect class="ring__rect" x="2" y="2" width="156" height="96" rx="14" ry="14"></rect>
    </svg>
    <div class="card__body">
      <h3 class="card__title">Basic plan</h3>
      <p class="card__meta">4,900 KRW/mo</p>
    </div>
  </article>
</main>

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

$duration: $dur-quick;                                    // 링이 그려지는 시간
$easing: $ease-spring;
$color: $subject-blue;                                     // 링 색

@include stage($stage-ink);
.stage { padding: clamp(8px, 2.4vw, 16px); }

.card {
  position: relative;
  width: min(160px, 50vw);
  aspect-ratio: 8 / 5;
  border-radius: $r-card;
  background: $stage-paper;
  box-shadow: $shadow-press;
  padding: $sp-3;
  box-sizing: border-box;
  outline: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.ring {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  pointer-events: none;
}
.ring__rect {
  fill: none;
  stroke: $color;
  stroke-width: 3;
  stroke-linecap: round;
  stroke-dasharray: 500;
  stroke-dashoffset: 500;
  transition: stroke-dashoffset $duration $easing;
}
.card__title { margin: 0 0 $sp-1; font-weight: 700; font-size: clamp(12px, 3.4vw, 14px); line-height: 1.3; font-family: inherit; color: $stage-ink; }
.card__meta { margin: 0; font-weight: 500; font-size: clamp(11px, 3vw, 12px); line-height: 1.3; font-family: inherit; color: rgba($stage-ink, .6); }

.card:hover .ring__rect,
.card:focus-visible .ring__rect,
.card:active .ring__rect {
  stroke-dashoffset: 0;
}
.card.is-demo .ring__rect { animation: ring-loop $dur-loop $easing infinite; }
@keyframes ring-loop {
  0%, 10%  { stroke-dashoffset: 500; }
  55%, 80% { stroke-dashoffset: 0; }
  100%     { stroke-dashoffset: 500; }
}

@media (prefers-reduced-motion: reduce) {
  .ring__rect { transition: none; }
  .card.is-demo .ring__rect { animation: none; stroke-dashoffset: 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);
}

.stage {
  padding: clamp(8px, 2.4vw, 16px);
}

.card {
  position: relative;
  width: min(160px, 50vw);
  aspect-ratio: 8/5;
  border-radius: 16px;
  background: #ffffff;
  box-shadow: 0 6px 12px rgba(23, 20, 26, 0.32);
  padding: 12px;
  box-sizing: border-box;
  outline: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.ring {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.ring__rect {
  fill: none;
  stroke: #2f6df6;
  stroke-width: 3;
  stroke-linecap: round;
  stroke-dasharray: 500;
  stroke-dashoffset: 500;
  transition: stroke-dashoffset 220ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.card__title {
  margin: 0 0 4px;
  font-weight: 700;
  font-size: clamp(12px, 3.4vw, 14px);
  line-height: 1.3;
  font-family: inherit;
  color: #17141a;
}

.card__meta {
  margin: 0;
  font-weight: 500;
  font-size: clamp(11px, 3vw, 12px);
  line-height: 1.3;
  font-family: inherit;
  color: rgba(23, 20, 26, 0.6);
}

.card:hover .ring__rect,
.card:focus-visible .ring__rect,
.card:active .ring__rect {
  stroke-dashoffset: 0;
}

.card.is-demo .ring__rect {
  animation: ring-loop 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

@keyframes ring-loop {
  0%, 10% {
    stroke-dashoffset: 500;
  }
  55%, 80% {
    stroke-dashoffset: 0;
  }
  100% {
    stroke-dashoffset: 500;
  }
}
@media (prefers-reduced-motion: reduce) {
  .ring__rect {
    transition: none;
  }
  .card.is-demo .ring__rect {
    animation: none;
    stroke-dashoffset: 0;
  }
}

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

export type SelectRingCardProps = {
  title: string;
  meta: string;
  /** 링이 그려지는 시간 (기본 220ms) */
  duration?: number;
  easing?: string;
  /** 링 색 */
  color?: string;
};

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

export default function SelectRingCard({
  title,
  meta,
  duration = 220,
  easing = "cubic-bezier(.2,.8,.2,1)",
  color = "#2f6df6",
}: SelectRingCardProps) {
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <article className={styles.card} style={vars} tabIndex={0}>
      <svg className={styles.ring} viewBox="0 0 160 100" aria-hidden="true">
        <rect className={styles.ringRect} x={2} y={2} width={156} height={96} rx={14} ry={14} />
      </svg>
      <div className={styles.body}>
        <h3 className={styles.title}>{title}</h3>
        <p className={styles.meta}>{meta}</p>
      </div>
    </article>
  );
}