01Basic ring spinner

<main class="stage">
  <div class="spinner" role="status" aria-label="Loading"></div>
</main>

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

$duration: 1s;                                    // 한 바퀴 도는 시간
$easing: linear;                                  // 등속
$color: $subject-blue;                            // 진한 구간 색

@include stage($stage-ink);

.spinner {
  width: clamp(48px, 14vw, 72px);
  height: clamp(48px, 14vw, 72px);
  border-radius: 50%;
  border: 6px solid rgba($subject-cream, .22);
  border-top-color: $color;                       // 위쪽 한 변만 진하게
  animation: spin $duration $easing infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@media (prefers-reduced-motion: reduce) {
  .spinner { animation: none; border-top-color: rgba($subject-cream, .22); }
}

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);
}

.spinner {
  width: clamp(48px, 14vw, 72px);
  height: clamp(48px, 14vw, 72px);
  border-radius: 50%;
  border: 6px solid rgba(255, 247, 230, 0.22);
  border-top-color: #2f6df6;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}
@media (prefers-reduced-motion: reduce) {
  .spinner {
    animation: none;
    border-top-color: rgba(255, 247, 230, 0.22);
  }
}

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

export type RingSpinnerProps = {
  /** 스피너 지름 (기본 56px) */
  size?: number;
  /** 한 바퀴 도는 시간 (기본 1000ms) */
  duration?: number;
  /** 진한 구간 색 */
  color?: string;
  /** 접근성 라벨 */
  label?: string;
};

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

export default function RingSpinner({
  size = 56,
  duration = 1000,
  color = "#2f6df6",
  label = "Loading",
}: RingSpinnerProps) {
  const vars: Vars = {
    "--size": `${size}px`,
    "--duration": `${duration}ms`,
    "--color": color,
  };
  return <div className={styles.spinner} style={vars} role="status" aria-label={label} />;
}