06Signup step progress

<main class="stage">
  <ol class="stepper is-demo" aria-label="Signup progress">
    <li class="stepper__step stepper__step--1"><span class="stepper__dot">1</span><span class="stepper__label">Account</span></li>
    <li class="stepper__connector"><span class="stepper__fill stepper__fill--1"></span></li>
    <li class="stepper__step stepper__step--2"><span class="stepper__dot">2</span><span class="stepper__label">Profile</span></li>
    <li class="stepper__connector"><span class="stepper__fill stepper__fill--2"></span></li>
    <li class="stepper__step stepper__step--3"><span class="stepper__dot">3</span><span class="stepper__label">Done</span></li>
  </ol>
</main>

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

$duration: $dur-base;                                  // 연결선이 채워지는 시간
$easing: $ease-out;
$color: $subject-blue;                                 // 진행 색

@include stage($stage-yellow);

.stepper {
  width: min(260px, 90vw);
  margin: 0; padding: 0;
  list-style: none;
  display: flex;
  align-items: center;
}
.stepper__step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: $sp-1;
  flex: 0 0 auto;
}
.stepper__dot {
  width: 28px; height: 28px;
  border-radius: 50%;
  display: grid; place-items: center;
  background: #e6e2d8;
  color: rgba($subject-ink, .72);
  font-weight: 700;
  font-size: 12px;
  font-family: inherit;
  transition: background $duration $easing, color $duration $easing;
}
.stepper__label { font-size: 10px; color: rgba($subject-ink, .72); font-family: inherit; }
.stepper__connector {
  flex: 1 1 auto;
  height: 3px;
  margin: 0 $sp-1 16px;
  border-radius: $r-xs;
  background: #e6e2d8;
  overflow: hidden;
}
.stepper__fill {
  display: block;
  height: 100%;
  width: 0%;
  background: $color;
  border-radius: $r-xs;
}

.stepper.is-demo .stepper__fill--1 { animation: fill-1 $dur-loop $easing infinite; }
.stepper.is-demo .stepper__fill--2 { animation: fill-2 $dur-loop $easing infinite; }
.stepper.is-demo .stepper__step--1 .stepper__dot,
.stepper.is-demo .stepper__step--2 .stepper__dot { animation: dot-fill $dur-loop step-end infinite; }
.stepper.is-demo .stepper__step--2 .stepper__dot { animation-delay: calc(#{$dur-loop} / 2); }

@keyframes fill-1 {
  0%, 8%    { width: 0%; }
  42%, 100% { width: 100%; }
}
@keyframes fill-2 {
  0%, 50%   { width: 0%; }
  92%, 100% { width: 100%; }
}
@keyframes dot-fill {
  0%   { background: #e6e2d8; color: #8a8272; }
  100% { background: $color; color: $stage-paper; }
}

@media (prefers-reduced-motion: reduce) {
  .stepper.is-demo .stepper__fill--1,
  .stepper.is-demo .stepper__fill--2,
  .stepper.is-demo .stepper__step--1 .stepper__dot,
  .stepper.is-demo .stepper__step--2 .stepper__dot { animation: none; }
}

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);
}

.stepper {
  width: min(260px, 90vw);
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  align-items: center;
}

.stepper__step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  flex: 0 0 auto;
}

.stepper__dot {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: #e6e2d8;
  color: rgba(23, 20, 26, 0.72);
  font-weight: 700;
  font-size: 12px;
  font-family: inherit;
  transition: background 300ms ease-out, color 300ms ease-out;
}

.stepper__label {
  font-size: 10px;
  color: rgba(23, 20, 26, 0.72);
  font-family: inherit;
}

.stepper__connector {
  flex: 1 1 auto;
  height: 3px;
  margin: 0 4px 16px;
  border-radius: 4px;
  background: #e6e2d8;
  overflow: hidden;
}

.stepper__fill {
  display: block;
  height: 100%;
  width: 0%;
  background: #2f6df6;
  border-radius: 4px;
}

.stepper.is-demo .stepper__fill--1 {
  animation: fill-1 2s ease-out infinite;
}

.stepper.is-demo .stepper__fill--2 {
  animation: fill-2 2s ease-out infinite;
}

.stepper.is-demo .stepper__step--1 .stepper__dot,
.stepper.is-demo .stepper__step--2 .stepper__dot {
  animation: dot-fill 2s step-end infinite;
}

.stepper.is-demo .stepper__step--2 .stepper__dot {
  animation-delay: calc(2s / 2);
}

@keyframes fill-1 {
  0%, 8% {
    width: 0%;
  }
  42%, 100% {
    width: 100%;
  }
}
@keyframes fill-2 {
  0%, 50% {
    width: 0%;
  }
  92%, 100% {
    width: 100%;
  }
}
@keyframes dot-fill {
  0% {
    background: #e6e2d8;
    color: #8a8272;
  }
  100% {
    background: #2f6df6;
    color: #ffffff;
  }
}
@media (prefers-reduced-motion: reduce) {
  .stepper.is-demo .stepper__fill--1,
  .stepper.is-demo .stepper__fill--2,
  .stepper.is-demo .stepper__step--1 .stepper__dot,
  .stepper.is-demo .stepper__step--2 .stepper__dot {
    animation: none;
  }
}

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

export type SignupStepProgressProps = {
  /** 1~3. 지금 사용자가 있는 단계 */
  step: 1 | 2 | 3;
  /** 연결선이 채워지는 시간 (기본 300ms) */
  duration?: number;
  easing?: string;
  color?: string;
};

const LABELS = ["Account", "Profile", "Done"];

/** step prop 이 올라갈 때마다 그 앞 연결선의 width 가 전환된다 */
export default function SignupStepProgress({
  step,
  duration = 300,
  easing = "ease-out",
  color = "#2f6df6",
}: SignupStepProgressProps) {
  const style = { "--duration": `${duration}ms`, "--easing": easing, "--color": color } as CSSProperties;
  const items = LABELS.flatMap((label, i) => {
    const nodes = [
      <li key={`s${i}`} className={styles.step}>
        <span className={styles.dot} data-done={i + 1 <= step}>{i + 1}</span>
        <span className={styles.label}>{label}</span>
      </li>,
    ];
    if (i < LABELS.length - 1) {
      nodes.push(
        <li key={`c${i}`} className={styles.connector}>
          <span className={styles.fill} style={{ width: i + 1 < step ? "100%" : "0%" }} />
        </li>
      );
    }
    return nodes;
  });
  return (
    <ol className={styles.stepper} style={style} aria-label="Signup progress">
      {items}
    </ol>
  );
}