02Stat card row with sparkline reveal

<main class="stage">
  <div class="sc" role="group" aria-label="Key metrics">
    <div class="sc__head">
      <span class="sc__title">This week</span>
      <div class="sc__switch" role="group" aria-label="Period">
        <button class="sc__period is-active" type="button" data-period="week">Weekly</button>
        <button class="sc__period" type="button" data-period="month">Monthly</button>
      </div>
    </div>
    <div class="sc__row">
      <div class="sc__card is-demo">
        <span class="sc__label">Visitors</span>
        <span class="sc__value" data-week="4,210" data-month="16,940">4,210</span>
        <svg class="sc__spark" viewBox="0 0 60 24" aria-hidden="true">
          <path class="sc__spark-path" pathLength="100" d="M2 18 L12 14 L22 16 L32 8 L42 10 L50 4 L58 6" />
        </svg>
      </div>
      <div class="sc__card is-demo">
        <span class="sc__label">Conversion</span>
        <span class="sc__value" data-week="3.2%" data-month="3.6%">3.2%</span>
        <svg class="sc__spark" viewBox="0 0 60 24" aria-hidden="true">
          <path class="sc__spark-path" pathLength="100" d="M2 8 L12 10 L22 6 L32 12 L42 9 L50 14 L58 11" />
        </svg>
      </div>
      <div class="sc__card is-demo">
        <span class="sc__label">Revenue</span>
        <span class="sc__value" data-week="$8.4K" data-month="₩3,180만">$8.4K</span>
        <svg class="sc__spark" viewBox="0 0 60 24" aria-hidden="true">
          <path class="sc__spark-path" pathLength="100" d="M2 20 L12 16 L22 17 L32 11 L42 7 L50 9 L58 3" />
        </svg>
      </div>
    </div>
  </div>
</main>

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

$duration: $dur-base;
$easing: $ease-out;
$color: $subject-blue;

@include stage($stage-paper);

.sc {
  box-sizing: border-box;
  width: min(420px, 92vw);
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
}
.sc__head { display: flex; align-items: center; justify-content: space-between; margin-bottom: $sp-3; }
.sc__title { font-weight: 800; font-size: 13px; color: $stage-ink; }
.sc__switch { display: flex; gap: $sp-1; padding: $sp-1; border-radius: $r-pill; background: rgba(23, 20, 26, .06); }
.sc__period {
  border: 0; background: transparent; cursor: pointer;
  padding: $sp-1 $sp-3; border-radius: $r-pill;
  font-weight: 700; font-size: 10px; font-family: inherit; color: rgba(23, 20, 26, .72);
  transition: background $duration $easing, color $duration $easing;
}
.sc__period.is-active { background: $stage-ink; color: $subject-cream; }

.sc__row { display: flex; gap: $sp-3; }
.sc__card {
  box-sizing: border-box;
  flex: 1 1 0;
  min-width: 0;
  border-radius: $r-card;
  padding: $sp-3;
  background: #fff;
  box-shadow: $shadow-raised;
  position: relative;
  overflow: hidden;
}
.sc__label { display: block; font-size: 10px; font-weight: 700; color: rgba(23, 20, 26, .72); margin-bottom: $sp-1; }
.sc__value {
  display: block; font-size: clamp(14px, 4vw, 18px); font-weight: 800; color: $stage-ink;
  transition: opacity $dur-quick $easing;
}
.sc__value.is-swap { opacity: 0; }
.sc__spark { display: block; width: 100%; height: 24px; margin-top: $sp-2; overflow: visible; }
.sc__spark-path {
  fill: none;
  stroke: $color;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 100;
  stroke-dashoffset: 100;
}

// ── 자동 루프: 스파크라인이 계속 그려진다 (호버 없이도 보이도록) ──────────────
.sc__card.is-demo .sc__spark-path { animation: sc-draw 2s $easing infinite; }
@keyframes sc-draw {
  0%   { stroke-dashoffset: 100; }
  60%  { stroke-dashoffset: 0; }
  100% { stroke-dashoffset: 0; }
}

@media (max-width: 340px) {
  .sc__row { gap: $sp-2; }
  .sc__card { padding: $sp-2; }
  .sc__label { font-size: 9px; }
}

@media (prefers-reduced-motion: reduce) {
  .sc__card.is-demo .sc__spark-path { animation: none !important; stroke-dashoffset: 0; }
  .sc__value { transition: none; }
}

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);
}

.sc {
  box-sizing: border-box;
  width: min(420px, 92vw);
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
}

.sc__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.sc__title {
  font-weight: 800;
  font-size: 13px;
  color: #17141a;
}

.sc__switch {
  display: flex;
  gap: 4px;
  padding: 4px;
  border-radius: 999px;
  background: rgba(23, 20, 26, 0.06);
}

.sc__period {
  border: 0;
  background: transparent;
  cursor: pointer;
  padding: 4px 12px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 10px;
  font-family: inherit;
  color: rgba(23, 20, 26, 0.72);
  transition: background 300ms ease-out, color 300ms ease-out;
}

.sc__period.is-active {
  background: #17141a;
  color: #fff7e6;
}

.sc__row {
  display: flex;
  gap: 12px;
}

.sc__card {
  box-sizing: border-box;
  flex: 1 1 0;
  min-width: 0;
  border-radius: 16px;
  padding: 12px;
  background: #fff;
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
  position: relative;
  overflow: hidden;
}

.sc__label {
  display: block;
  font-size: 10px;
  font-weight: 700;
  color: rgba(23, 20, 26, 0.72);
  margin-bottom: 4px;
}

.sc__value {
  display: block;
  font-size: clamp(14px, 4vw, 18px);
  font-weight: 800;
  color: #17141a;
  transition: opacity 220ms ease-out;
}

.sc__value.is-swap {
  opacity: 0;
}

.sc__spark {
  display: block;
  width: 100%;
  height: 24px;
  margin-top: 8px;
  overflow: visible;
}

.sc__spark-path {
  fill: none;
  stroke: #2f6df6;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 100;
  stroke-dashoffset: 100;
}

.sc__card.is-demo .sc__spark-path {
  animation: sc-draw 2s ease-out infinite;
}

@keyframes sc-draw {
  0% {
    stroke-dashoffset: 100;
  }
  60% {
    stroke-dashoffset: 0;
  }
  100% {
    stroke-dashoffset: 0;
  }
}
@media (max-width: 340px) {
  .sc__row {
    gap: 8px;
  }
  .sc__card {
    padding: 8px;
  }
  .sc__label {
    font-size: 9px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .sc__card.is-demo .sc__spark-path {
    animation: none !important;
    stroke-dashoffset: 0;
  }
  .sc__value {
    transition: none;
  }
}

// 실제 동작: Weekly/Monthly 버튼을 누르면 세 카드 숫자가 실제로 교체된다(크로스페이드). 첫 클릭에 자동 루프를 멈춘다.
var buttons = document.querySelectorAll('.sc__period');
var cards = document.querySelectorAll('.sc__card');
buttons.forEach(function (b) {
  b.addEventListener('click', function () {
    cards.forEach(function (c) { c.classList.remove('is-demo'); });
    buttons.forEach(function (o) { o.classList.remove('is-active'); });
    b.classList.add('is-active');
    var period = b.dataset.period;
    cards.forEach(function (c) {
      var v = c.querySelector('.sc__value');
      v.classList.add('is-swap');
      setTimeout(function () {
        v.textContent = v.dataset[period];
        v.classList.remove('is-swap');
      }, 140);
    });
  });
});

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

export type StatCardsProps = {
  duration?: number;
  easing?: string;
  color?: string;
};

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

const CARDS: { label: string; week: string; month: string; path: string }[] = [
  { label: "방문자", week: "4,210", month: "16,940", path: "M2 18 L12 14 L22 16 L32 8 L42 10 L50 4 L58 6" },
  { label: "전환율", week: "3.2%", month: "3.6%", path: "M2 8 L12 10 L22 6 L32 12 L42 9 L50 14 L58 11" },
  { label: "매출", week: "₩842만", month: "₩3,180만", path: "M2 20 L12 16 L22 17 L32 11 L42 7 L50 9 L58 3" },
];

export default function StatCards({ duration = 220, easing = "ease-out", color = "#2f6df6" }: StatCardsProps) {
  const [period, setPeriod] = useState<Period>("week");
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <div className={styles.sc} style={vars} role="group" aria-label="핵심 지표">
      <div className={styles.head}>
        <span className={styles.title}>이번 주</span>
        <div className={styles.switch} role="group" aria-label="기간">
          {(["week", "month"] as Period[]).map((p) => (
            <button
              key={p}
              type="button"
              className={period === p ? styles.active : undefined}
              onClick={() => setPeriod(p)}
            >
              {p === "week" ? "주간" : "월간"}
            </button>
          ))}
        </div>
      </div>
      <div className={styles.row}>
        {CARDS.map((c) => (
          <div className={styles.card} key={c.label}>
            <span className={styles.label}>{c.label}</span>
            <span className={styles.value}>{period === "week" ? c.week : c.month}</span>
            <svg className={styles.spark} viewBox="0 0 60 24" aria-hidden="true">
              <path pathLength={100} d={c.path} />
            </svg>
          </div>
        ))}
      </div>
    </div>
  );
}