06Checkout stepper

<main class="stage">
  <div class="ts06-steps is-demo">
    <div class="ts06-step">
      <span class="ts06-circle" aria-label="Done">
        <svg class="ts06-check" viewBox="0 0 16 16" fill="none" aria-hidden="true"><polyline points="3,8 7,12 13,4" /></svg>
        <span class="ts06-num">1</span>
      </span>
      <span class="ts06-label">Cart</span>
    </div>
    <span class="ts06-bar"><span class="ts06-fill"></span></span>
    <div class="ts06-step">
      <span class="ts06-circle" aria-label="Done">
        <svg class="ts06-check" viewBox="0 0 16 16" fill="none" aria-hidden="true"><polyline points="3,8 7,12 13,4" /></svg>
        <span class="ts06-num">2</span>
      </span>
      <span class="ts06-label">Shipping</span>
    </div>
    <span class="ts06-bar"><span class="ts06-fill"></span></span>
    <div class="ts06-step ts06-step--active">
      <span class="ts06-circle"><span class="ts06-num">3</span></span>
      <span class="ts06-label">Payment</span>
    </div>
    <span class="ts06-bar"></span>
    <div class="ts06-step">
      <span class="ts06-circle"><span class="ts06-num">4</span></span>
      <span class="ts06-label">Done</span>
    </div>
  </div>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: $dur-loop;
$easing: $ease-out;
$color: $stage-ink;

@include stage($stage-yellow);

.ts06-steps {
  display: flex;
  align-items: flex-start;
  width: min(340px, 90vw);
}

.ts06-step {
  flex-grow: 0;
  flex-shrink: 0;
  flex-basis: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: $sp-2;
  color: $color;
  font: 600 11px/1 -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
}

.ts06-circle {
  position: relative;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(23, 20, 26, .12);
  display: grid;
  place-items: center;
}

.ts06-num { font-weight: 700; font-size: 13px; line-height: 1; font-family: inherit; }

// 체크 아이콘: SVG polyline 을 stroke-dashoffset 으로 그린다 (BD16: 막대 두 개 사선 대신 안전한 방법)
.ts06-check {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  padding: 8px;
  box-sizing: border-box;
  opacity: 0;

  polyline {
    fill: none;
    stroke: $subject-cream;
    stroke-width: 2.4;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-dasharray: 16;
    stroke-dashoffset: 16;
  }
}

.ts06-num { opacity: 0; }

// 실제 사용 코드: 끝난 단계는 JS 가 .is-checked 를 붙이면 체크가 그려지고 숫자는 사라진다
.ts06-step.is-checked .ts06-circle { background: $color; }
.ts06-step.is-checked .ts06-check { opacity: 1; }
.ts06-step.is-checked .ts06-check polyline { animation: ts06-draw .5s $easing forwards; }
.ts06-step.is-checked .ts06-num { display: none; }
.ts06-step:not(.is-checked) .ts06-num { opacity: 1; }
.ts06-step--active .ts06-circle { background: $color; color: $subject-cream; }
.ts06-step--active .ts06-num { opacity: 1; color: $subject-cream; }
.ts06-step.is-checked + .ts06-bar .ts06-fill { transform: scaleX(1); }

.ts06-bar {
  flex-grow: 1;
  flex-shrink: 1;
  flex-basis: 0;
  height: 3px;
  margin-top: 16px;
  background: rgba(23, 20, 26, .14);
  border-radius: $r-xs;
  overflow: hidden;
  display: block;
}
.ts06-fill {
  display: block;
  width: 100%;
  height: 100%;
  background: $color;
  transform: scaleX(0);
  transform-origin: left; // 규칙8: 체크아웃 연결선 좌측 채움
}

@keyframes ts06-draw { from { stroke-dashoffset: 16; } to { stroke-dashoffset: 0; } }

// 데모 루프: 1·2 는 이미 완료, 3(결제)이 활성 상태로 펄스
.ts06-steps.is-demo .ts06-step--active .ts06-circle { animation: ts06-active-pulse 1.2s $easing infinite; }
.ts06-steps.is-demo .ts06-step:nth-child(1) .ts06-circle,
.ts06-steps.is-demo .ts06-step:nth-child(3) .ts06-circle { background: $color; }
.ts06-steps.is-demo .ts06-step:nth-child(1) .ts06-check,
.ts06-steps.is-demo .ts06-step:nth-child(3) .ts06-check { opacity: 1; }
.ts06-steps.is-demo .ts06-step:nth-child(1) .ts06-num,
.ts06-steps.is-demo .ts06-step:nth-child(3) .ts06-num { display: none; }
.ts06-steps.is-demo .ts06-step:nth-child(1) .ts06-check polyline { animation: ts06-draw-loop $duration $easing infinite; }
.ts06-steps.is-demo .ts06-step:nth-child(3) .ts06-check polyline { animation: ts06-draw-loop $duration $easing infinite; animation-delay: .35s; }
.ts06-steps.is-demo .ts06-bar:nth-child(2) .ts06-fill { animation: ts06-fill-loop $duration $easing infinite; }
.ts06-steps.is-demo .ts06-bar:nth-child(4) .ts06-fill { animation: ts06-fill-loop $duration $easing infinite; animation-delay: .35s; }

@keyframes ts06-draw-loop {
  0%, 5%  { stroke-dashoffset: 16; }
  35%, 100% { stroke-dashoffset: 0; }
}
@keyframes ts06-fill-loop {
  0%, 8%   { transform: scaleX(0); }
  40%, 100% { transform: scaleX(1); }
}
@keyframes ts06-active-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(23, 20, 26, .35); }
  50%      { box-shadow: 0 0 0 6px rgba(23, 20, 26, 0); }
}

@media (prefers-reduced-motion: reduce) {
  .ts06-check polyline, .ts06-steps.is-demo .ts06-check polyline { animation: none !important; stroke-dashoffset: 0 !important; }
  .ts06-fill, .ts06-steps.is-demo .ts06-fill { animation: none !important; }
  .ts06-steps.is-demo .ts06-step--active .ts06-circle { 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);
}

.ts06-steps {
  display: flex;
  align-items: flex-start;
  width: min(340px, 90vw);
}

.ts06-step {
  flex-grow: 0;
  flex-shrink: 0;
  flex-basis: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: #17141a;
  font: 600 11px/1 -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
}

.ts06-circle {
  position: relative;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(23, 20, 26, 0.12);
  display: grid;
  place-items: center;
}

.ts06-num {
  font-weight: 700;
  font-size: 13px;
  line-height: 1;
  font-family: inherit;
}

.ts06-check {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  padding: 8px;
  box-sizing: border-box;
  opacity: 0;
}
.ts06-check polyline {
  fill: none;
  stroke: #fff7e6;
  stroke-width: 2.4;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 16;
  stroke-dashoffset: 16;
}

.ts06-num {
  opacity: 0;
}

.ts06-step.is-checked .ts06-circle {
  background: #17141a;
}

.ts06-step.is-checked .ts06-check {
  opacity: 1;
}

.ts06-step.is-checked .ts06-check polyline {
  animation: ts06-draw 0.5s ease-out forwards;
}

.ts06-step.is-checked .ts06-num {
  display: none;
}

.ts06-step:not(.is-checked) .ts06-num {
  opacity: 1;
}

.ts06-step--active .ts06-circle {
  background: #17141a;
  color: #fff7e6;
}

.ts06-step--active .ts06-num {
  opacity: 1;
  color: #fff7e6;
}

.ts06-step.is-checked + .ts06-bar .ts06-fill {
  transform: scaleX(1);
}

.ts06-bar {
  flex-grow: 1;
  flex-shrink: 1;
  flex-basis: 0;
  height: 3px;
  margin-top: 16px;
  background: rgba(23, 20, 26, 0.14);
  border-radius: 4px;
  overflow: hidden;
  display: block;
}

.ts06-fill {
  display: block;
  width: 100%;
  height: 100%;
  background: #17141a;
  transform: scaleX(0);
  transform-origin: left;
}

@keyframes ts06-draw {
  from {
    stroke-dashoffset: 16;
  }
  to {
    stroke-dashoffset: 0;
  }
}
.ts06-steps.is-demo .ts06-step--active .ts06-circle {
  animation: ts06-active-pulse 1.2s ease-out infinite;
}

.ts06-steps.is-demo .ts06-step:nth-child(1) .ts06-circle,
.ts06-steps.is-demo .ts06-step:nth-child(3) .ts06-circle {
  background: #17141a;
}

.ts06-steps.is-demo .ts06-step:nth-child(1) .ts06-check,
.ts06-steps.is-demo .ts06-step:nth-child(3) .ts06-check {
  opacity: 1;
}

.ts06-steps.is-demo .ts06-step:nth-child(1) .ts06-num,
.ts06-steps.is-demo .ts06-step:nth-child(3) .ts06-num {
  display: none;
}

.ts06-steps.is-demo .ts06-step:nth-child(1) .ts06-check polyline {
  animation: ts06-draw-loop 2s ease-out infinite;
}

.ts06-steps.is-demo .ts06-step:nth-child(3) .ts06-check polyline {
  animation: ts06-draw-loop 2s ease-out infinite;
  animation-delay: 0.35s;
}

.ts06-steps.is-demo .ts06-bar:nth-child(2) .ts06-fill {
  animation: ts06-fill-loop 2s ease-out infinite;
}

.ts06-steps.is-demo .ts06-bar:nth-child(4) .ts06-fill {
  animation: ts06-fill-loop 2s ease-out infinite;
  animation-delay: 0.35s;
}

@keyframes ts06-draw-loop {
  0%, 5% {
    stroke-dashoffset: 16;
  }
  35%, 100% {
    stroke-dashoffset: 0;
  }
}
@keyframes ts06-fill-loop {
  0%, 8% {
    transform: scaleX(0);
  }
  40%, 100% {
    transform: scaleX(1);
  }
}
@keyframes ts06-active-pulse {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(23, 20, 26, 0.35);
  }
  50% {
    box-shadow: 0 0 0 6px rgba(23, 20, 26, 0);
  }
}
@media (prefers-reduced-motion: reduce) {
  .ts06-check polyline, .ts06-steps.is-demo .ts06-check polyline {
    animation: none !important;
    stroke-dashoffset: 0 !important;
  }
  .ts06-fill, .ts06-steps.is-demo .ts06-fill {
    animation: none !important;
  }
  .ts06-steps.is-demo .ts06-step--active .ts06-circle {
    animation: none !important;
  }
}

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

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

export interface CheckoutStepperProps {
  duration?: string;
  easing?: string;
  color?: string;
  labels?: string[];
  activeIndex?: number;
}

export default function CheckoutStepper({
  duration = "500ms",
  easing = "ease-out",
  color = "#17141a",
  labels = ["장바구니", "배송", "결제", "완료"],
  activeIndex = 2,
}: CheckoutStepperProps) {
  const style: Vars = { "--duration": duration, "--easing": easing, "--color": color };
  return (
    <div className={styles.steps} style={style}>
      {labels.map((label, i) => (
        <div key={label} style={{ display: "contents" }}>
          <div className={styles.step}>
            <span className={`${styles.circle} ${i < activeIndex ? styles.checked : ""} ${i === activeIndex ? styles.active : ""}`} aria-label={i < activeIndex ? "완료" : undefined}>
              {i < activeIndex ? (
                <svg className={styles.check} viewBox="0 0 16 16" fill="none" aria-hidden="true">
                  <polyline points="3,8 7,12 13,4" />
                </svg>
              ) : (
                <span className={styles.num}>{i + 1}</span>
              )}
            </span>
            <span>{label}</span>
          </div>
          {i < labels.length - 1 && (
            <span className={styles.bar}>
              <span className={`${styles.fill} ${i < activeIndex - 1 ? styles.filled : ""}`} />
            </span>
          )}
        </div>
      ))}
    </div>
  );
}