04Iridescent holographic text

<main class="stage">
  <h2 class="holo-text">Holographic Sale</h2>
</main>

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

$duration: $dur-loop;                                   // 색이 한 바퀴 도는 시간
$easing: linear;
$color: $subject-blue;                                  // 사용 안 함 — 그라디언트가 색을 대신한다(참고용)

@include stage($stage-paper);

.holo-text {
  margin: 0;
  font-weight: 800;
  font-size: clamp(26px, 9vw, 38px);
  line-height: 1.1;
  font-family: inherit;
  background: linear-gradient(90deg, #dcb9d1, #b9d9dc, #c8dcb9, #dcdab9, #dcb9d1);
  background-size: 300% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: hue-rotate(0deg);
  animation: holo-hue $duration $easing infinite, holo-slide $duration $easing infinite;
}

@keyframes holo-hue { to { filter: hue-rotate(360deg); } }
@keyframes holo-slide {
  0%   { background-position: 0% 50%; }
  100% { background-position: 300% 50%; }
}

@media (prefers-reduced-motion: reduce) {
  .holo-text { animation: none; filter: hue-rotate(0deg); background-position: 0% 50%; }
}

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

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

.holo-text {
  margin: 0;
  font-weight: 800;
  font-size: clamp(26px, 9vw, 38px);
  line-height: 1.1;
  font-family: inherit;
  background: linear-gradient(90deg, #dcb9d1, #b9d9dc, #c8dcb9, #dcdab9, #dcb9d1);
  background-size: 300% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: hue-rotate(0deg);
  animation: holo-hue 2s linear infinite, holo-slide 2s linear infinite;
}

@keyframes holo-hue {
  to {
    filter: hue-rotate(360deg);
  }
}
@keyframes holo-slide {
  0% {
    background-position: 0% 50%;
  }
  100% {
    background-position: 300% 50%;
  }
}
@media (prefers-reduced-motion: reduce) {
  .holo-text {
    animation: none;
    filter: hue-rotate(0deg);
    background-position: 0% 50%;
  }
}

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

export type HoloTextIridescentProps = {
  text: string;
  /** 색이 한 바퀴 도는 시간 (기본 2000ms) */
  duration?: number;
  easing?: string;
  /** 사용 안 함 — 그라디언트가 색을 대신한다 (참고용) */
  color?: string;
};

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

export default function HoloTextIridescent({
  text,
  duration = 2000,
  easing = "linear",
  color = "#2f6df6",
}: HoloTextIridescentProps) {
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };
  return <h2 className={styles.text} style={vars}>{text}</h2>;
}