02Thanh điều hướng pill bo tròn

<main class="stage">
  <nav class="navbar">
    <span class="navbar__brand">Nectar</span>
    <div class="navbar__pill is-demo">
      <span class="navbar__indicator" aria-hidden="true"></span>
      <span class="navbar__item">Trang chủ</span>
      <span class="navbar__item">Tính năng</span>
      <span class="navbar__item">Bảng giá</span>
      <span class="navbar__item">Liên hệ</span>
    </div>
    <button class="navbar__cta" type="button">Bắt đầu miễn phí</button>
  </nav>
</main>

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

$duration: $dur-loop;      // 표시등이 네 항목을 도는 한 주기
$easing: $ease-spring;     // 이동 곡선
$color: $subject-blue;     // 표시등 색

@include stage($stage-yellow);

.navbar {
  width: clamp(260px, 84vw, 420px);
  display: flex;
  align-items: center;
  gap: clamp(8px, 2vw, 14px);
  background: $subject-cream;
  border-radius: $r-pill;
  padding: 8px 8px 8px 16px;
  box-shadow: $shadow-raised;
}
.navbar__brand {
  color: $subject-ink;
  font-weight: 800; font-size: clamp(12px, 3vw, 14px); line-height: 1;
  flex: none;
}
.navbar__pill {
  position: relative;
  flex: 1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: rgba($subject-ink, .06);
  border-radius: $r-pill;
  padding: 4px;
}
.navbar__indicator {
  position: absolute;
  inset: 4px auto 4px 4px;
  width: calc(25% - 4px);
  border-radius: $r-pill;
  background: $color;
  animation: navSlide $duration $easing infinite;
}
.navbar__item {
  position: relative;
  z-index: 1;
  text-align: center;
  color: $subject-ink;
  font-weight: 600; font-size: clamp(9.5px, 2.3vw, 11.5px); line-height: 1;
  padding: clamp(6px, 1.6vw, 8px) 2px;
}
.navbar__cta {
  flex: none;
  border: 0;
  border-radius: $r-pill;
  background: $subject-blue-deep;
  color: $subject-cream;
  padding: clamp(7px, 1.8vw, 9px) clamp(12px, 2.6vw, 15px);
  font-weight: 700; font-size: clamp(9.5px, 2.3vw, 11.5px); line-height: 1;
}

// 데모: 표시등이 홈 → 기능 → 요금제 → 문의 순으로 옮겨간 뒤 처음으로 돌아온다
@keyframes navSlide {
  0%   { transform: translateX(0%); }
  12%  { transform: translateX(0%); }
  25%  { transform: translateX(100%); }
  37%  { transform: translateX(100%); }
  50%  { transform: translateX(200%); }
  62%  { transform: translateX(200%); }
  75%  { transform: translateX(300%); }
  87%  { transform: translateX(300%); }
  100% { transform: translateX(0%); }
}

@media (prefers-reduced-motion: reduce) {
  .navbar__indicator {
    animation: none !important;
    transform: translateX(0%);
  }
}

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);
}

.navbar {
  width: clamp(260px, 84vw, 420px);
  display: flex;
  align-items: center;
  gap: clamp(8px, 2vw, 14px);
  background: #fff7e6;
  border-radius: 999px;
  padding: 8px 8px 8px 16px;
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
}

.navbar__brand {
  color: #17141a;
  font-weight: 800;
  font-size: clamp(12px, 3vw, 14px);
  line-height: 1;
  flex: none;
}

.navbar__pill {
  position: relative;
  flex: 1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: rgba(23, 20, 26, 0.06);
  border-radius: 999px;
  padding: 4px;
}

.navbar__indicator {
  position: absolute;
  inset: 4px auto 4px 4px;
  width: calc(25% - 4px);
  border-radius: 999px;
  background: #2f6df6;
  animation: navSlide 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

.navbar__item {
  position: relative;
  z-index: 1;
  text-align: center;
  color: #17141a;
  font-weight: 600;
  font-size: clamp(9.5px, 2.3vw, 11.5px);
  line-height: 1;
  padding: clamp(6px, 1.6vw, 8px) 2px;
}

.navbar__cta {
  flex: none;
  border: 0;
  border-radius: 999px;
  background: #0a4fe8;
  color: #fff7e6;
  padding: clamp(7px, 1.8vw, 9px) clamp(12px, 2.6vw, 15px);
  font-weight: 700;
  font-size: clamp(9.5px, 2.3vw, 11.5px);
  line-height: 1;
}

@keyframes navSlide {
  0% {
    transform: translateX(0%);
  }
  12% {
    transform: translateX(0%);
  }
  25% {
    transform: translateX(100%);
  }
  37% {
    transform: translateX(100%);
  }
  50% {
    transform: translateX(200%);
  }
  62% {
    transform: translateX(200%);
  }
  75% {
    transform: translateX(300%);
  }
  87% {
    transform: translateX(300%);
  }
  100% {
    transform: translateX(0%);
  }
}
@media (prefers-reduced-motion: reduce) {
  .navbar__indicator {
    animation: none !important;
    transform: translateX(0%);
  }
}

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

export type BentoNavProps = {
  brand?: string;
  items?: string[];
  cta?: string;
  duration?: number;
  easing?: string;
  color?: string;
};

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

export default function BentoNav({
  brand = "Nectar",
  items = ["Home", "Features", "Pricing", "Contact"],
  cta = "Start for free",
  duration = 2000,
  easing = "cubic-bezier(.2,.8,.2,1)",
  color = "#2f6df6",
}: BentoNavProps) {
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <nav className={styles.navbar} style={vars}>
      <span className={styles.brand}>{brand}</span>
      <div className={styles.pill}>
        <span className={styles.indicator} aria-hidden="true" />
        {items.map((label) => (
          <span key={label} className={styles.item}>{label}</span>
        ))}
      </div>
      <button type="button" className={styles.cta}>{cta}</button>
    </nav>
  );
}