9 bento grid css — hiệu ứng hover dán một dòng

<main class="stage">
  <div class="bs-grid is-demo">
    <div class="bs-tile bs-tile--a bs-focal">
      <span class="bs-tile__tag">Project</span>
      <span class="bs-tile__num">01</span>
    </div>
    <div class="bs-tile bs-tile--b">
      <span class="bs-tile__tag">New</span>
    </div>
    <div class="bs-tile bs-tile--c">
      <span class="bs-tile__tag">42%</span>
    </div>
  </div>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: $dur-base;
$easing: $ease-spring;
$color: $subject-blue;

@include stage($stage-ink);

.bs-grid {
  width: min(340px, 90vw);
  aspect-ratio: 340 / 190;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: $sp-2;
}

.bs-tile {
  border-radius: $r-sm;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: $sp-3;
  box-sizing: border-box;
  color: $subject-cream;
  font: 600 12px/1 -apple-system, "Segoe UI", sans-serif;
}

.bs-tile--a {
  grid-row: 1 / 3;
  background: linear-gradient(160deg, $color, rgba(23, 20, 26, .85));
}

.bs-tile--b, .bs-tile--c {
  background: rgba(255, 255, 255, .08);
}

.bs-tile__tag { opacity: .8; font-size: 11px; }
.bs-tile__num { font-size: 22px; font-weight: 700; margin-top: $sp-1; }

// 실사용: 진짜 마우스 호버로 트랜지션
.bs-focal {
  transition: transform $duration $easing, box-shadow $duration $easing;
  box-shadow: $shadow-press;
}
.bs-focal:hover {
  transform: scale(1.04);
  box-shadow: $shadow-raised;
}

// 데모 루프: is-demo 는 같은 모양을 keyframes 로 무한 재생 (캡처용 — 헤드리스는 :hover 를 못 건다)
@keyframes bs-breathe {
  0%, 100% { transform: scale(1); box-shadow: $shadow-press; }
  50% { transform: scale(1.04); box-shadow: $shadow-raised; }
}
.bs-grid.is-demo .bs-focal { animation: bs-breathe $duration $easing infinite; }

@media (prefers-reduced-motion: reduce) {
  .bs-focal:hover,
  .bs-grid.is-demo .bs-focal { animation: none !important; transform: none !important; box-shadow: $shadow-press !important; }
}

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);
}

.bs-grid {
  width: min(340px, 90vw);
  aspect-ratio: 340/190;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 8px;
}

.bs-tile {
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 12px;
  box-sizing: border-box;
  color: #fff7e6;
  font: 600 12px/1 -apple-system, "Segoe UI", sans-serif;
}

.bs-tile--a {
  grid-row: 1/3;
  background: linear-gradient(160deg, #2f6df6, rgba(23, 20, 26, 0.85));
}

.bs-tile--b, .bs-tile--c {
  background: rgba(255, 255, 255, 0.08);
}

.bs-tile__tag {
  opacity: 0.8;
  font-size: 11px;
}

.bs-tile__num {
  font-size: 22px;
  font-weight: 700;
  margin-top: 4px;
}

.bs-focal {
  transition: transform 300ms cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
  box-shadow: 0 6px 12px rgba(23, 20, 26, 0.32);
}

.bs-focal:hover {
  transform: scale(1.04);
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
}

@keyframes bs-breathe {
  0%, 100% {
    transform: scale(1);
    box-shadow: 0 6px 12px rgba(23, 20, 26, 0.32);
  }
  50% {
    transform: scale(1.04);
    box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
  }
}
.bs-grid.is-demo .bs-focal {
  animation: bs-breathe 300ms cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

@media (prefers-reduced-motion: reduce) {
  .bs-focal:hover,
  .bs-grid.is-demo .bs-focal {
    animation: none !important;
    transform: none !important;
    box-shadow: 0 6px 12px rgba(23, 20, 26, 0.32) !important;
  }
}

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

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

export interface BreathScaleShadowProps {
  duration?: string;
  easing?: string;
  color?: string;
}

export default function BreathScaleShadow({
  duration = "300ms",
  easing = "cubic-bezier(.2, .8, .2, 1)",
  color = "#2f6df6",
}: BreathScaleShadowProps) {
  const style: Vars = {
    "--duration": duration,
    "--easing": easing,
    "--color": color,
  };
  return (
    <div className={styles.grid} style={style}>
      <div className={`${styles.tile} ${styles.tileA} ${styles.focal}`}>
        <span className={styles.tag}>Project</span>
        <span className={styles.num}>01</span>
      </div>
      <div className={`${styles.tile} ${styles.tileB}`}>
        <span className={styles.tag}>New</span>
      </div>
      <div className={`${styles.tile} ${styles.tileC}`}>
        <span className={styles.tag}>42%</span>
      </div>
    </div>
  );
}

<main class="stage">
  <div class="bb-grid is-demo">
    <div class="bb-tile bb-tile--a bb-focal">
      <span class="bb-tile__tag">Featured</span>
      <span class="bb-tile__sub">Pro plan</span>
    </div>
    <div class="bb-tile bb-tile--b">
      <span class="bb-tile__tag">+12</span>
    </div>
    <div class="bb-tile bb-tile--c">
      <span class="bb-tile__tag">Live</span>
    </div>
  </div>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: 1.6s;
$easing: linear;
$color: $subject-blue;

@include stage($stage-yellow);

.bb-grid {
  width: min(340px, 90vw);
  aspect-ratio: 340 / 190;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: $sp-2;
}

.bb-tile {
  border-radius: $r-sm;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: $sp-3;
  box-sizing: border-box;
  color: $subject-cream;
  background: $subject-ink;
  font: 600 12px/1 -apple-system, "Segoe UI", sans-serif;
  position: relative;
  overflow: hidden;
}

.bb-tile--a { grid-row: 1 / 3; }
.bb-tile--b, .bb-tile--c { background: rgba(23, 20, 26, .78); }

.bb-tile__tag { font-size: 12px; opacity: .85; }
.bb-tile__sub { font-size: 18px; font-weight: 700; margin-top: $sp-1; }

// 빛줄기 — 두께 $sp-1 만큼만 링으로 보이게 mask. 회전은 transform 만 (그라디언트 각도 자체는 애니메이트하지 않는다)
.bb-focal::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: $sp-1;
  box-sizing: border-box;
  background: conic-gradient(from 0deg, transparent 0 70%, $color 85%, transparent 100%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  pointer-events: none;
  opacity: 0;
}

// 실사용: 진짜 마우스 호버
.bb-focal:hover::before { opacity: 1; animation: bb-spin $duration $easing infinite; }

@keyframes bb-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

// 데모 루프: is-demo 는 같은 회전을 무한 재생 (캡처용)
.bb-grid.is-demo .bb-focal::before { opacity: 1; animation: bb-spin $duration $easing infinite; }

@media (prefers-reduced-motion: reduce) {
  .bb-focal:hover::before,
  .bb-grid.is-demo .bb-focal::before { animation: none !important; }
}

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

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #ffd23f;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.bb-grid {
  width: min(340px, 90vw);
  aspect-ratio: 340/190;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 8px;
}

.bb-tile {
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 12px;
  box-sizing: border-box;
  color: #fff7e6;
  background: #17141a;
  font: 600 12px/1 -apple-system, "Segoe UI", sans-serif;
  position: relative;
  overflow: hidden;
}

.bb-tile--a {
  grid-row: 1/3;
}

.bb-tile--b, .bb-tile--c {
  background: rgba(23, 20, 26, 0.78);
}

.bb-tile__tag {
  font-size: 12px;
  opacity: 0.85;
}

.bb-tile__sub {
  font-size: 18px;
  font-weight: 700;
  margin-top: 4px;
}

.bb-focal::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 4px;
  box-sizing: border-box;
  background: conic-gradient(from 0deg, transparent 0 70%, #2f6df6 85%, transparent 100%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  pointer-events: none;
  opacity: 0;
}

.bb-focal:hover::before {
  opacity: 1;
  animation: bb-spin 1.6s linear infinite;
}

@keyframes bb-spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}
.bb-grid.is-demo .bb-focal::before {
  opacity: 1;
  animation: bb-spin 1.6s linear infinite;
}

@media (prefers-reduced-motion: reduce) {
  .bb-focal:hover::before,
  .bb-grid.is-demo .bb-focal::before {
    animation: none !important;
  }
}

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

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

export interface BorderBeamTileProps {
  duration?: string;
  easing?: string;
  color?: string;
}

export default function BorderBeamTile({
  duration = "1.6s",
  easing = "linear",
  color = "#2f6df6",
}: BorderBeamTileProps) {
  const style: Vars = {
    "--duration": duration,
    "--easing": easing,
    "--color": color,
  };
  return (
    <div className={styles.grid} style={style}>
      <div className={`${styles.tile} ${styles.tileA} ${styles.focal}`}>
        <span className={styles.tag}>Featured</span>
        <span className={styles.sub}>Pro plan</span>
      </div>
      <div className={`${styles.tile} ${styles.tileB}`}>
        <span className={styles.tag}>+12</span>
      </div>
      <div className={`${styles.tile} ${styles.tileC}`}>
        <span className={styles.tag}>Live</span>
      </div>
    </div>
  );
}

<main class="stage">
  <div class="iz-grid is-demo">
    <div class="iz-tile iz-tile--a iz-focal">
      <div class="iz-tile__media"></div>
      <span class="iz-tile__label">View</span>
    </div>
    <div class="iz-tile iz-tile--b">
      <span class="iz-tile__tag">Gallery</span>
    </div>
    <div class="iz-tile iz-tile--c">
      <span class="iz-tile__tag">24 photos</span>
    </div>
  </div>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: $dur-enter;
$easing: linear;
$color: $subject-blue;

@include stage($stage-orange);

.iz-grid {
  width: min(340px, 90vw);
  aspect-ratio: 340 / 190;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: $sp-2;
}

.iz-tile {
  border-radius: $r-sm;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: $sp-3;
  box-sizing: border-box;
  color: $subject-cream;
  font: 600 12px/1 -apple-system, "Segoe UI", sans-serif;
  position: relative;
}

.iz-tile--a { grid-row: 1 / 3; overflow: hidden; }
.iz-tile--b, .iz-tile--c { background: $subject-ink; }

// 바깥 타일은 고정, 안쪽 media 레이어만 확대된다
.iz-tile__media {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(65px circle at 28% 66%, #fff, transparent 48%),
    linear-gradient(160deg, $color, $subject-ink);
}
.iz-tile__label { position: relative; z-index: 1; font-size: 12px; opacity: .9; }

// 실사용: 진짜 마우스 호버
.iz-tile__media { transition: transform $duration $easing; }
.iz-focal:hover .iz-tile__media { transform: scale(1.15); }

// 데모 루프: is-demo 는 같은 확대를 keyframes 로 무한 재생 (캡처용)
@keyframes iz-zoom {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.15); }
}
.iz-grid.is-demo .iz-focal .iz-tile__media { animation: iz-zoom $duration $easing infinite; }

@media (prefers-reduced-motion: reduce) {
  .iz-focal:hover .iz-tile__media,
  .iz-grid.is-demo .iz-focal .iz-tile__media { animation: none !important; transform: none !important; }
}

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

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #ff4d1f;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.iz-grid {
  width: min(340px, 90vw);
  aspect-ratio: 340/190;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 8px;
}

.iz-tile {
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 12px;
  box-sizing: border-box;
  color: #fff7e6;
  font: 600 12px/1 -apple-system, "Segoe UI", sans-serif;
  position: relative;
}

.iz-tile--a {
  grid-row: 1/3;
  overflow: hidden;
}

.iz-tile--b, .iz-tile--c {
  background: #17141a;
}

.iz-tile__media {
  position: absolute;
  inset: 0;
  background: radial-gradient(65px circle at 28% 66%, #fff, transparent 48%), linear-gradient(160deg, #2f6df6, #17141a);
}

.iz-tile__label {
  position: relative;
  z-index: 1;
  font-size: 12px;
  opacity: 0.9;
}

.iz-tile__media {
  transition: transform 600ms linear;
}

.iz-focal:hover .iz-tile__media {
  transform: scale(1.15);
}

@keyframes iz-zoom {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.15);
  }
}
.iz-grid.is-demo .iz-focal .iz-tile__media {
  animation: iz-zoom 600ms linear infinite;
}

@media (prefers-reduced-motion: reduce) {
  .iz-focal:hover .iz-tile__media,
  .iz-grid.is-demo .iz-focal .iz-tile__media {
    animation: none !important;
    transform: none !important;
  }
}

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

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

export interface ImageZoomTileProps {
  duration?: string;
  easing?: string;
  color?: string;
}

export default function ImageZoomTile({
  duration = "400ms",
  easing = "ease-out",
  color = "#2f6df6",
}: ImageZoomTileProps) {
  const style: Vars = {
    "--duration": duration,
    "--easing": easing,
    "--color": color,
  };
  return (
    <div className={styles.grid} style={style}>
      <div className={`${styles.tile} ${styles.tileA} ${styles.focal}`}>
        <div className={styles.media} />
        <span className={styles.label}>View</span>
      </div>
      <div className={`${styles.tile} ${styles.tileB}`}>
        <span className={styles.tag}>Gallery</span>
      </div>
      <div className={`${styles.tile} ${styles.tileC}`}>
        <span className={styles.tag}>24 photos</span>
      </div>
    </div>
  );
}

<main class="stage">
  <div class="if-grid is-demo">
    <div class="if-tile if-tile--a if-focal">
      <span class="if-icon"></span>
      <span class="if-tile__label">Fast</span>
    </div>
    <div class="if-tile if-tile--b">
      <span class="if-tile__tag">Beta</span>
    </div>
    <div class="if-tile if-tile--c">
      <span class="if-tile__tag">v2</span>
    </div>
  </div>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: 1.4s;
$easing: $ease-out;
$color: $subject-blue;

@include stage($stage-paper);

.if-grid {
  width: min(340px, 90vw);
  aspect-ratio: 340 / 190;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: $sp-2;
}

.if-tile {
  border-radius: $r-sm;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: flex-start;
  gap: $sp-2;
  padding: $sp-3;
  box-sizing: border-box;
  color: $subject-ink;
  font: 600 12px/1 -apple-system, "Segoe UI", sans-serif;
  background: rgba(23, 20, 26, .05);
}

.if-tile--a { grid-row: 1 / 3; justify-content: center; align-items: center; }
.if-tile--b, .if-tile--c { justify-content: flex-end; align-items: flex-start; }

.if-tile__tag { opacity: .7; }
.if-tile__label { opacity: .8; }

// 아이콘 — 이모지 대신 CSS 로 그린 둥근 사각형 + 안쪽 점
.if-icon {
  position: relative;
  width: $sp-8;
  height: $sp-8;
  border-radius: $r-control;
  background: $color;
  display: block;
}
.if-icon::after {
  content: "";
  position: absolute;
  inset: $sp-2;
  border-radius: $r-pill;
  background: $subject-cream;
}

// 실사용: 진짜 마우스 호버 — 평소엔 가만히, 호버해야 떠오른다
.if-focal:hover .if-icon { animation: if-bob $duration $easing infinite; }

@keyframes if-bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

// 데모 루프: is-demo 는 같은 동작을 무한 재생 (캡처용)
.if-grid.is-demo .if-focal .if-icon { animation: if-bob $duration $easing infinite; }

@media (prefers-reduced-motion: reduce) {
  .if-focal:hover .if-icon,
  .if-grid.is-demo .if-focal .if-icon { animation: none !important; transform: none !important; }
}

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);
}

.if-grid {
  width: min(340px, 90vw);
  aspect-ratio: 340/190;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 8px;
}

.if-tile {
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: flex-start;
  gap: 8px;
  padding: 12px;
  box-sizing: border-box;
  color: #17141a;
  font: 600 12px/1 -apple-system, "Segoe UI", sans-serif;
  background: rgba(23, 20, 26, 0.05);
}

.if-tile--a {
  grid-row: 1/3;
  justify-content: center;
  align-items: center;
}

.if-tile--b, .if-tile--c {
  justify-content: flex-end;
  align-items: flex-start;
}

.if-tile__tag {
  opacity: 0.7;
}

.if-tile__label {
  opacity: 0.8;
}

.if-icon {
  position: relative;
  width: 32px;
  height: 32px;
  border-radius: 12px;
  background: #2f6df6;
  display: block;
}

.if-icon::after {
  content: "";
  position: absolute;
  inset: 8px;
  border-radius: 999px;
  background: #fff7e6;
}

.if-focal:hover .if-icon {
  animation: if-bob 1.4s ease-out infinite;
}

@keyframes if-bob {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-6px);
  }
}
.if-grid.is-demo .if-focal .if-icon {
  animation: if-bob 1.4s ease-out infinite;
}

@media (prefers-reduced-motion: reduce) {
  .if-focal:hover .if-icon,
  .if-grid.is-demo .if-focal .if-icon {
    animation: none !important;
    transform: none !important;
  }
}

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

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

export interface IconFloatTileProps {
  duration?: string;
  easing?: string;
  color?: string;
}

export default function IconFloatTile({
  duration = "1.4s",
  easing = "ease-out",
  color = "#2f6df6",
}: IconFloatTileProps) {
  const style: Vars = {
    "--duration": duration,
    "--easing": easing,
    "--color": color,
  };
  return (
    <div className={styles.grid} style={style}>
      <div className={`${styles.tile} ${styles.tileA} ${styles.focal}`}>
        <span className={styles.icon} />
        <span className={styles.label}>Fast</span>
      </div>
      <div className={`${styles.tile} ${styles.tileB}`}>
        <span className={styles.tag}>Beta</span>
      </div>
      <div className={`${styles.tile} ${styles.tileC}`}>
        <span className={styles.tag}>v2</span>
      </div>
    </div>
  );
}

<main class="stage">
  <div class="gr-grid is-demo">
    <div class="gr-tile gr-tile--a gr-focal">
      <span class="gr-tile__scrim"></span>
      <span class="gr-tile__label">City lights</span>
    </div>
    <div class="gr-tile gr-tile--b">
      <span class="gr-tile__tag">Trending</span>
    </div>
    <div class="gr-tile gr-tile--c">
      <span class="gr-tile__tag">New</span>
    </div>
  </div>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: 350ms;
$easing: $ease-out;
$color: $subject-blue;

@include stage($stage-ink);

.gr-grid {
  width: min(340px, 90vw);
  aspect-ratio: 340 / 190;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: $sp-2;
}

.gr-tile {
  border-radius: $r-sm;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: $sp-3;
  box-sizing: border-box;
  color: $subject-cream;
  font: 600 12px/1 -apple-system, "Segoe UI", sans-serif;
  position: relative;
  overflow: hidden;
}

.gr-tile--a { grid-row: 1 / 3; background: linear-gradient(160deg, $color, rgba(255, 255, 255, .2)); }
.gr-tile--b, .gr-tile--c { background: rgba(255, 255, 255, .08); }
.gr-tile__tag { opacity: .8; }

// 평소엔 사진만: 스크림은 opacity 0, 제목은 아래로 8px 밀려 있다
.gr-tile__scrim {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, .75), transparent 65%);
  opacity: 0;
  transition: opacity $duration $easing;
}
.gr-tile__label {
  position: relative;
  z-index: 1;
  transform: translateY($sp-2);
  transition: transform $duration $easing;
}

// 실사용: 진짜 마우스 호버
.gr-focal:hover .gr-tile__scrim { opacity: 1; }
.gr-focal:hover .gr-tile__label { transform: translateY(0); }

// 데모 루프: is-demo 는 같은 등장을 keyframes 로 무한 재생 (캡처용)
@keyframes gr-scrim-in { 0%, 100% { opacity: 0; } 50% { opacity: 1; } }
@keyframes gr-label-up { 0%, 100% { transform: translateY($sp-2); } 50% { transform: translateY(0); } }
.gr-grid.is-demo .gr-focal .gr-tile__scrim { animation: gr-scrim-in $duration $easing infinite; }
.gr-grid.is-demo .gr-focal .gr-tile__label { animation: gr-label-up $duration $easing infinite; }

@media (prefers-reduced-motion: reduce) {
  .gr-focal:hover .gr-tile__scrim, .gr-focal:hover .gr-tile__label,
  .gr-grid.is-demo .gr-focal .gr-tile__scrim, .gr-grid.is-demo .gr-focal .gr-tile__label {
    animation: none !important; transition: none !important;
  }
}

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);
}

.gr-grid {
  width: min(340px, 90vw);
  aspect-ratio: 340/190;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 8px;
}

.gr-tile {
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 12px;
  box-sizing: border-box;
  color: #fff7e6;
  font: 600 12px/1 -apple-system, "Segoe UI", sans-serif;
  position: relative;
  overflow: hidden;
}

.gr-tile--a {
  grid-row: 1/3;
  background: linear-gradient(160deg, #2f6df6, rgba(255, 255, 255, 0.2));
}

.gr-tile--b, .gr-tile--c {
  background: rgba(255, 255, 255, 0.08);
}

.gr-tile__tag {
  opacity: 0.8;
}

.gr-tile__scrim {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.75), transparent 65%);
  opacity: 0;
  transition: opacity 350ms ease-out;
}

.gr-tile__label {
  position: relative;
  z-index: 1;
  transform: translateY(8px);
  transition: transform 350ms ease-out;
}

.gr-focal:hover .gr-tile__scrim {
  opacity: 1;
}

.gr-focal:hover .gr-tile__label {
  transform: translateY(0);
}

@keyframes gr-scrim-in {
  0%, 100% {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
}
@keyframes gr-label-up {
  0%, 100% {
    transform: translateY(8px);
  }
  50% {
    transform: translateY(0);
  }
}
.gr-grid.is-demo .gr-focal .gr-tile__scrim {
  animation: gr-scrim-in 350ms ease-out infinite;
}

.gr-grid.is-demo .gr-focal .gr-tile__label {
  animation: gr-label-up 350ms ease-out infinite;
}

@media (prefers-reduced-motion: reduce) {
  .gr-focal:hover .gr-tile__scrim, .gr-focal:hover .gr-tile__label,
  .gr-grid.is-demo .gr-focal .gr-tile__scrim, .gr-grid.is-demo .gr-focal .gr-tile__label {
    animation: none !important;
    transition: none !important;
  }
}

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

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

export interface GradientRevealTileProps {
  duration?: string;
  easing?: string;
  color?: string;
}

export default function GradientRevealTile({
  duration = "350ms",
  easing = "ease-out",
  color = "#2f6df6",
}: GradientRevealTileProps) {
  const style: Vars = {
    "--duration": duration,
    "--easing": easing,
    "--color": color,
  };
  return (
    <div className={styles.grid} style={style}>
      <div className={`${styles.tile} ${styles.tileA} ${styles.focal}`}>
        <span className={styles.scrim} />
        <span className={styles.label}>City lights</span>
      </div>
      <div className={`${styles.tile} ${styles.tileB}`}>
        <span className={styles.tag}>Trending</span>
      </div>
      <div className={`${styles.tile} ${styles.tileC}`}>
        <span className={styles.tag}>New</span>
      </div>
    </div>
  );
}

<main class="stage">
  <div class="sc-grid is-demo">
    <div class="sc-tile sc-tile--a sc-focal">
      <span class="sc-tile__tag">Conversion</span>
      <span class="sc-stat"><span class="sc-stat__value"></span><span class="sc-stat__unit">%</span></span>
    </div>
    <div class="sc-tile sc-tile--b">
      <span class="sc-tile__tag">Live</span>
    </div>
    <div class="sc-tile sc-tile--c">
      <span class="sc-tile__tag">+9 today</span>
    </div>
  </div>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: 1.2s;
$easing: $ease-out;
$target: 87;

@include stage($stage-yellow);

// 카운트업에 쓰는 커스텀 속성 — 정수 타입으로 등록해야 키프레임이 숫자를 보간한다
// 지원: Chromium·Safari 16.4+·Firefox 128+ (그 밖은 카운트업 없이 목표값이 바로 보인다)
@property --num {
  syntax: '<integer>';
  inherits: true;
  initial-value: 0;
}

.sc-grid {
  width: min(340px, 90vw);
  aspect-ratio: 340 / 190;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: $sp-2;
}

.sc-tile {
  border-radius: $r-sm;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: $sp-3;
  box-sizing: border-box;
  color: $subject-ink;
  font: 600 12px/1 -apple-system, "Segoe UI", sans-serif;
  background: $subject-cream;
}

.sc-tile--a { grid-row: 1 / 3; }
.sc-tile--b, .sc-tile--c { background: rgba(23, 20, 26, .08); }
.sc-tile__tag { opacity: .7; }

.sc-stat { margin-top: $sp-1; font-size: 30px; font-weight: 700; }
// 실제로 보이는 숫자는 ::after 의 counter() 다 — value 자신의 텍스트는 비워둔다
.sc-stat__value {
  --num: 0;
}
.sc-stat__value::after {
  counter-reset: num var(--num);
  content: counter(num);
}
.sc-stat__unit { margin-left: $sp-1; font-size: 16px; opacity: .7; }

@keyframes sc-countup {
  to { --num: #{$target}; }
}

// 실사용: 진짜 마우스 호버 — JS 없이 CSS 만으로 카운트업
.sc-focal:hover .sc-stat__value { animation: sc-countup $duration $easing forwards; }

// 데모 루프: is-demo 는 같은 카운트업을 forwards 로 (헤드리스 캡처는 currentTime 을 직접 놓아 0→목표를 그대로 읽는다)
.sc-grid.is-demo .sc-focal .sc-stat__value { animation: sc-countup $duration $easing forwards; }

@media (prefers-reduced-motion: reduce) {
  .sc-focal:hover .sc-stat__value,
  .sc-grid.is-demo .sc-focal .sc-stat__value { animation: none !important; --num: #{$target}; }
}

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

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #ffd23f;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

@property --num {
  syntax: "<integer>";
  inherits: true;
  initial-value: 0;
}
.sc-grid {
  width: min(340px, 90vw);
  aspect-ratio: 340/190;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 8px;
}

.sc-tile {
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 12px;
  box-sizing: border-box;
  color: #17141a;
  font: 600 12px/1 -apple-system, "Segoe UI", sans-serif;
  background: #fff7e6;
}

.sc-tile--a {
  grid-row: 1/3;
}

.sc-tile--b, .sc-tile--c {
  background: rgba(23, 20, 26, 0.08);
}

.sc-tile__tag {
  opacity: 0.7;
}

.sc-stat {
  margin-top: 4px;
  font-size: 30px;
  font-weight: 700;
}

.sc-stat__value {
  --num: 0;
}

.sc-stat__value::after {
  counter-reset: num var(--num);
  content: counter(num);
}

.sc-stat__unit {
  margin-left: 4px;
  font-size: 16px;
  opacity: 0.7;
}

@keyframes sc-countup {
  to {
    --num: 87;
  }
}
.sc-focal:hover .sc-stat__value {
  animation: sc-countup 1.2s ease-out forwards;
}

.sc-grid.is-demo .sc-focal .sc-stat__value {
  animation: sc-countup 1.2s ease-out forwards;
}

@media (prefers-reduced-motion: reduce) {
  .sc-focal:hover .sc-stat__value,
  .sc-grid.is-demo .sc-focal .sc-stat__value {
    animation: none !important;
    --num: 87;
  }
}

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

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

export interface StatCountTileProps {
  duration?: string;
  easing?: string;
  target?: number;
}

// 지원: Chromium·Safari 16.4+·Firefox 128+. 미지원 브라우저는 카운트업 없이 목표값이 바로 보인다
export default function StatCountTile({
  duration = "1.2s",
  easing = "ease-out",
  target = 87,
}: StatCountTileProps) {
  const style: Vars = {
    "--duration": duration,
    "--easing": easing,
    "--target": target,
  };
  return (
    <div className={styles.grid} style={style}>
      <div className={`${styles.tile} ${styles.tileA} ${styles.focal}`}>
        <span className={styles.tag}>Conversion</span>
        <span className={styles.stat}>
          <span className={styles.value} />
          <span className={styles.unit}>%</span>
        </span>
      </div>
      <div className={`${styles.tile} ${styles.tileB}`}>
        <span className={styles.tag}>Live</span>
      </div>
      <div className={`${styles.tile} ${styles.tileC}`}>
        <span className={styles.tag}>+9 today</span>
      </div>
    </div>
  );
}

<main class="stage">
  <div class="he-grid is-demo">
    <div class="he-tile he-focal">
      <span class="he-tile__tag">Live</span>
      <span class="he-tile__num">128</span>
    </div>
    <div class="he-tile">
      <span class="he-tile__tag">Users</span>
    </div>
    <div class="he-tile">
      <span class="he-tile__tag">Sessions</span>
    </div>
    <div class="he-tile">
      <span class="he-tile__tag">Errors</span>
    </div>
  </div>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: $dur-enter;
$easing: $ease-spring;
$scale: 1.35;

@include stage($stage-orange);

.he-grid {
  width: min(320px, 88vw);
  aspect-ratio: 340 / 190;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: $sp-2;
}

.he-tile {
  border-radius: $r-sm;
  padding: $sp-3;
  box-sizing: border-box;
  color: $subject-cream;
  background: rgba(23, 20, 26, .55);
  font: 600 12px/1 -apple-system, "Segoe UI", sans-serif;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  position: relative;
  transform-origin: top left; // 규칙8: 그리드 좌상단 칸 안쪽 확장
}

.he-focal { background: $subject-ink; }
.he-tile__tag { opacity: .8; }
.he-tile__num { font-size: 24px; font-weight: 700; margin-top: $sp-1; }

// grid-column/row 의 span 값 자체는 트랜지션이 걸리지 않는다(이산값이라 중간 프레임이 없다) —
// 그래서 실제 칸 배치는 그대로 두고 transform: scale + z-index 로 옆 칸을 덮어 "확장"을 흉내 낸다
.he-focal {
  transition: transform $duration $easing, box-shadow $duration $easing;
  box-shadow: $shadow-press;
}
.he-focal:hover {
  transform: scale($scale);
  box-shadow: $shadow-raised;
  z-index: 5;
}

@keyframes he-expand {
  0%, 100% { transform: scale(1); box-shadow: $shadow-press; z-index: 1; }
  50% { transform: scale($scale); box-shadow: $shadow-raised; z-index: 5; }
}
.he-grid.is-demo .he-focal { animation: he-expand $duration $easing infinite; }

@media (prefers-reduced-motion: reduce) {
  .he-focal:hover,
  .he-grid.is-demo .he-focal { animation: none !important; transform: none !important; box-shadow: $shadow-press !important; z-index: 1 !important; }
}

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

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #ff4d1f;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.he-grid {
  width: min(320px, 88vw);
  aspect-ratio: 340/190;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: 8px;
}

.he-tile {
  border-radius: 8px;
  padding: 12px;
  box-sizing: border-box;
  color: #fff7e6;
  background: rgba(23, 20, 26, 0.55);
  font: 600 12px/1 -apple-system, "Segoe UI", sans-serif;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  position: relative;
  transform-origin: top left;
}

.he-focal {
  background: #17141a;
}

.he-tile__tag {
  opacity: 0.8;
}

.he-tile__num {
  font-size: 24px;
  font-weight: 700;
  margin-top: 4px;
}

.he-focal {
  transition: transform 600ms cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 600ms cubic-bezier(0.2, 0.8, 0.2, 1);
  box-shadow: 0 6px 12px rgba(23, 20, 26, 0.32);
}

.he-focal:hover {
  transform: scale(1.35);
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
  z-index: 5;
}

@keyframes he-expand {
  0%, 100% {
    transform: scale(1);
    box-shadow: 0 6px 12px rgba(23, 20, 26, 0.32);
    z-index: 1;
  }
  50% {
    transform: scale(1.35);
    box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
    z-index: 5;
  }
}
.he-grid.is-demo .he-focal {
  animation: he-expand 600ms cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

@media (prefers-reduced-motion: reduce) {
  .he-focal:hover,
  .he-grid.is-demo .he-focal {
    animation: none !important;
    transform: none !important;
    box-shadow: 0 6px 12px rgba(23, 20, 26, 0.32) !important;
    z-index: 1 !important;
  }
}

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

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

export interface HoverExpandSpanProps {
  duration?: string;
  easing?: string;
  scale?: number;
}

// grid-column/row 의 span 값은 트랜지션이 걸리지 않아 transform: scale + z-index 로 확장을 흉내 낸다
export default function HoverExpandSpan({
  duration = "600ms",
  easing = "cubic-bezier(.2, .8, .2, 1)",
  scale = 1.35,
}: HoverExpandSpanProps) {
  const style: Vars = {
    "--duration": duration,
    "--easing": easing,
    "--scale": scale,
  };
  return (
    <div className={styles.grid} style={style}>
      <div className={`${styles.tile} ${styles.focal}`}>
        <span className={styles.tag}>Live</span>
        <span className={styles.num}>128</span>
      </div>
      <div className={styles.tile}>
        <span className={styles.tag}>Users</span>
      </div>
      <div className={styles.tile}>
        <span className={styles.tag}>Sessions</span>
      </div>
      <div className={styles.tile}>
        <span className={styles.tag}>Errors</span>
      </div>
    </div>
  );
}

<main class="stage">
  <div class="ss-grid is-demo">
    <div class="ss-tile"><span class="ss-tile__tag">Design</span></div>
    <div class="ss-tile"><span class="ss-tile__tag">Build</span></div>
    <div class="ss-tile"><span class="ss-tile__tag">Ship</span></div>
    <div class="ss-tile"><span class="ss-tile__tag">Scale</span></div>
  </div>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: $dur-loop;
$easing: $ease-out;
$stagger: 160ms;

@include stage($stage-paper);

.ss-grid {
  width: min(320px, 88vw);
  aspect-ratio: 340 / 190;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: $sp-2;
}

.ss-tile {
  border-radius: $r-sm;
  padding: $sp-3;
  box-sizing: border-box;
  color: $subject-ink;
  background: rgba(23, 20, 26, .06);
  font: 600 12px/1 -apple-system, "Segoe UI", sans-serif;
  display: flex;
  align-items: flex-end;
  // 진짜 등장 전 상태 — transition 경로와 keyframes 경로가 같은 시작점을 공유한다
  opacity: 0;
  transform: translateY($sp-4);
}
.ss-tile__tag { opacity: .8; }

// 실사용: 진짜 IntersectionObserver 가 뷰포트에 들어올 때 .in 을 붙인다(위 <script>). 타일마다 delay 만 다르다
.ss-tile {
  transition: opacity 400ms $easing, transform 400ms $easing;
}
.ss-tile.in { opacity: 1; transform: translateY(0); }
.ss-tile:nth-child(1).in { transition-delay: 0ms; }
.ss-tile:nth-child(2).in { transition-delay: $stagger; }
.ss-tile:nth-child(3).in { transition-delay: $stagger * 2; }
.ss-tile:nth-child(4).in { transition-delay: $stagger * 3; }

// 데모 루프: is-demo 는 transition 경로를 쓰지 않는다 — scroll-timeline·view() 대신 keyframes 로 같은 순차 등장을 무한 재생한다(캡처용)
@keyframes ss-tile-in {
  0%   { opacity: 0; transform: translateY($sp-4); }
  30%  { opacity: 1; transform: translateY(0); }
  100% { opacity: 1; transform: translateY(0); }
}
.ss-grid.is-demo .ss-tile {
  animation: ss-tile-in $duration $easing infinite;
  animation-fill-mode: both;
}
.ss-grid.is-demo .ss-tile:nth-child(1) { animation-delay: 0ms; }
.ss-grid.is-demo .ss-tile:nth-child(2) { animation-delay: $stagger; }
.ss-grid.is-demo .ss-tile:nth-child(3) { animation-delay: $stagger * 2; }
.ss-grid.is-demo .ss-tile:nth-child(4) { animation-delay: $stagger * 3; }

@media (prefers-reduced-motion: reduce) {
  .ss-tile, .ss-tile.in,
  .ss-grid.is-demo .ss-tile {
    animation: none !important; transition: none !important; opacity: 1 !important; transform: none !important;
  }
}

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);
}

.ss-grid {
  width: min(320px, 88vw);
  aspect-ratio: 340/190;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: 8px;
}

.ss-tile {
  border-radius: 8px;
  padding: 12px;
  box-sizing: border-box;
  color: #17141a;
  background: rgba(23, 20, 26, 0.06);
  font: 600 12px/1 -apple-system, "Segoe UI", sans-serif;
  display: flex;
  align-items: flex-end;
  opacity: 0;
  transform: translateY(16px);
}

.ss-tile__tag {
  opacity: 0.8;
}

.ss-tile {
  transition: opacity 400ms ease-out, transform 400ms ease-out;
}

.ss-tile.in {
  opacity: 1;
  transform: translateY(0);
}

.ss-tile:nth-child(1).in {
  transition-delay: 0ms;
}

.ss-tile:nth-child(2).in {
  transition-delay: 160ms;
}

.ss-tile:nth-child(3).in {
  transition-delay: 320ms;
}

.ss-tile:nth-child(4).in {
  transition-delay: 480ms;
}

@keyframes ss-tile-in {
  0% {
    opacity: 0;
    transform: translateY(16px);
  }
  30% {
    opacity: 1;
    transform: translateY(0);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}
.ss-grid.is-demo .ss-tile {
  animation: ss-tile-in 2s ease-out infinite;
  animation-fill-mode: both;
}

.ss-grid.is-demo .ss-tile:nth-child(1) {
  animation-delay: 0ms;
}

.ss-grid.is-demo .ss-tile:nth-child(2) {
  animation-delay: 160ms;
}

.ss-grid.is-demo .ss-tile:nth-child(3) {
  animation-delay: 320ms;
}

.ss-grid.is-demo .ss-tile:nth-child(4) {
  animation-delay: 480ms;
}

@media (prefers-reduced-motion: reduce) {
  .ss-tile, .ss-tile.in,
  .ss-grid.is-demo .ss-tile {
    animation: none !important;
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}

var tiles = document.querySelectorAll('.ss-tile');
var io = new IntersectionObserver(function (entries) {
  entries.forEach(function (e) { if (e.isIntersecting) { e.target.classList.add('in'); io.unobserve(e.target); } });
}, { threshold: 0.3 });
tiles.forEach(function (t) { io.observe(t); });

import { CSSProperties, useEffect, useRef, useState } from "react";
import styles from "./ScrollStaggerTiles.module.scss";

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

export interface ScrollStaggerTilesProps {
  duration?: string;
  easing?: string;
  stagger?: string;
}

const LABELS = ["Design", "Build", "Ship", "Scale"];

// 실사용: 진짜 IntersectionObserver 가 그리드 전체가 뷰포트에 들어올 때 in 을 켠다. 타일마다 transition-delay 만 다르다.
// scroll-timeline / view() 는 쓰지 않는다 — 브라우저마다 렌더가 갈린다
export default function ScrollStaggerTiles({
  duration = "2s",
  easing = "ease-out",
  stagger = "160ms",
}: ScrollStaggerTilesProps) {
  const gridRef = useRef<HTMLDivElement>(null);
  const [inView, setInView] = useState(false);

  useEffect(() => {
    const el = gridRef.current;
    if (!el) return;
    const io = new IntersectionObserver((entries) => {
      entries.forEach((e) => { if (e.isIntersecting) { setInView(true); io.unobserve(e.target); } });
    }, { threshold: 0.3 });
    io.observe(el);
    return () => io.disconnect();
  }, []);

  const style: Vars = {
    "--duration": duration,
    "--easing": easing,
    "--stagger": stagger,
  };

  return (
    <div className={styles.grid} style={style} ref={gridRef}>
      {LABELS.map((label, i) => (
        <div
          key={label}
          className={`${styles.tile} ${inView ? styles.in : ""}`}
          style={{ transitionDelay: inView ? `calc(${stagger} * ${i})` : undefined }}
        >
          <span className={styles.tag}>{label}</span>
        </div>
      ))}
    </div>
  );
}

<main class="stage">
  <div class="sl-grid is-demo">
    <div class="sl-tile"><span class="sl-tile__tag">Product</span></div>
    <div class="sl-tile"><span class="sl-tile__tag">Design</span></div>
    <div class="sl-tile"><span class="sl-tile__tag">Growth</span></div>
    <div class="sl-tile"><span class="sl-tile__tag">Support</span></div>
  </div>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: $dur-loop;
$easing: linear;
$color: $subject-blue;

@include stage($stage-ink);

// 커서 좌표 — 퍼센트 타입으로 등록해야 is-demo 의 키프레임이 값을 보간한다. 그리드 전체에 상속돼 타일마다 같은 지점을 읽는다
@property --mx { syntax: '<percentage>'; inherits: true; initial-value: 50%; }
@property --my { syntax: '<percentage>'; inherits: true; initial-value: 50%; }

.sl-grid {
  width: min(320px, 88vw);
  aspect-ratio: 340 / 190;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: $sp-2;
  --mx: 50%;
  --my: 50%;
}

.sl-tile {
  border-radius: $r-sm;
  padding: $sp-3;
  box-sizing: border-box;
  color: $subject-cream;
  background: $subject-ink;
  font: 600 12px/1 -apple-system, "Segoe UI", sans-serif;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
}
.sl-tile__tag { position: relative; z-index: 1; opacity: .85; }

// 글로우 레이어 — 좌표는 공유하지만 opacity 는 :has() 로 "그리드 안 어딘가 호버 중"일 때만 켠다
.sl-tile::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(140px circle at var(--mx) var(--my), rgba($color, .6), transparent 70%);
  opacity: 0;
  transition: opacity 200ms $easing;
  pointer-events: none;
}

// 실사용: 진짜 pointermove 가 --mx·--my 를 갱신한다(위 <script>). 호버 중인 타일이 그리드 안에 있으면 전부 켠다
.sl-grid:has(.sl-tile:hover) .sl-tile::before { opacity: 1; }

// 데모 루프: is-demo 는 :has(:hover) 를 못 거니 opacity 를 직접 켜고, --mx·--my 는 keyframes 로 원을 그리며 돈다(캡처용)
@keyframes sl-drift {
  0%   { --mx: 10%; --my: 15%; }
  25%  { --mx: 90%; --my: 10%; }
  50%  { --mx: 85%; --my: 90%; }
  75%  { --mx: 10%; --my: 85%; }
  100% { --mx: 10%; --my: 15%; }
}
.sl-grid.is-demo { animation: sl-drift $duration $easing infinite; }
.sl-grid.is-demo .sl-tile::before { opacity: 1; }

@media (prefers-reduced-motion: reduce) {
  .sl-grid.is-demo { animation: none !important; }
  .sl-tile::before { transition: none !important; }
}

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);
}

@property --mx {
  syntax: "<percentage>";
  inherits: true;
  initial-value: 50%;
}
@property --my {
  syntax: "<percentage>";
  inherits: true;
  initial-value: 50%;
}
.sl-grid {
  width: min(320px, 88vw);
  aspect-ratio: 340/190;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: 8px;
  --mx: 50%;
  --my: 50%;
}

.sl-tile {
  border-radius: 8px;
  padding: 12px;
  box-sizing: border-box;
  color: #fff7e6;
  background: #17141a;
  font: 600 12px/1 -apple-system, "Segoe UI", sans-serif;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
}

.sl-tile__tag {
  position: relative;
  z-index: 1;
  opacity: 0.85;
}

.sl-tile::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(140px circle at var(--mx) var(--my), rgba(47, 109, 246, 0.6), transparent 70%);
  opacity: 0;
  transition: opacity 200ms linear;
  pointer-events: none;
}

.sl-grid:has(.sl-tile:hover) .sl-tile::before {
  opacity: 1;
}

@keyframes sl-drift {
  0% {
    --mx: 10%;
    --my: 15%;
  }
  25% {
    --mx: 90%;
    --my: 10%;
  }
  50% {
    --mx: 85%;
    --my: 90%;
  }
  75% {
    --mx: 10%;
    --my: 85%;
  }
  100% {
    --mx: 10%;
    --my: 15%;
  }
}
.sl-grid.is-demo {
  animation: sl-drift 2s linear infinite;
}

.sl-grid.is-demo .sl-tile::before {
  opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
  .sl-grid.is-demo {
    animation: none !important;
  }
  .sl-tile::before {
    transition: none !important;
  }
}

var grid = document.querySelector('.sl-grid');
grid.addEventListener('pointermove', function (e) {
  var r = grid.getBoundingClientRect();
  var x = ((e.clientX - r.left) / r.width * 100).toFixed(1) + '%';
  var y = ((e.clientY - r.top) / r.height * 100).toFixed(1) + '%';
  grid.style.setProperty('--mx', x);
  grid.style.setProperty('--my', y);
});

import { CSSProperties, PointerEvent, useCallback, useRef } from "react";
import styles from "./SpotlightNeighbors.module.scss";

type Vars = CSSProperties & { "--color"?: string; "--mx"?: string; "--my"?: string };

export interface SpotlightNeighborsProps {
  color?: string;
}

const LABELS = ["Product", "Design", "Growth", "Support"];

// 실사용: 진짜 pointermove 로 --mx·--my 를 갱신한다. 켜고 끄는 건 CSS :has() 가 한다
export default function SpotlightNeighbors({ color = "#2f6df6" }: SpotlightNeighborsProps) {
  const gridRef = useRef<HTMLDivElement>(null);

  const handleMove = useCallback((e: PointerEvent<HTMLDivElement>) => {
    const el = gridRef.current;
    if (!el) return;
    const r = el.getBoundingClientRect();
    const x = (((e.clientX - r.left) / r.width) * 100).toFixed(1) + "%";
    const y = (((e.clientY - r.top) / r.height) * 100).toFixed(1) + "%";
    el.style.setProperty("--mx", x);
    el.style.setProperty("--my", y);
  }, []);

  const style: Vars = { "--color": color };

  return (
    <div className={styles.grid} style={style} ref={gridRef} onPointerMove={handleMove}>
      {LABELS.map((label) => (
        <div key={label} className={styles.tile}>
          <span className={styles.tag}>{label}</span>
        </div>
      ))}
    </div>
  );
}