02Brushed-metal nav

<main class="stage">
  <nav class="nav-c">
    <span class="nav-c__brand">Chroma</span>
    <div class="nav-c__menu">
      <span class="nav-c__label nav-c__label--active">Home</span>
      <span class="nav-c__label">Features</span>
      <span class="nav-c__label">Pricing</span>
    </div>
    <button class="nav-c__cta" type="button">Try it free</button>
  </nav>
</main>

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

$duration: $dur-loop;
$easing: linear;
$color: $subject-blue;

@include stage($stage-yellow);

.nav-c {
  position: relative;
  overflow: hidden;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  gap: $sp-3;
  width: clamp(240px, 84vw, 380px);
  padding: $sp-2 $sp-3;
  border-radius: $r-pill;
  background: linear-gradient(100deg, rgba($stage-ink, .92) 0%, rgba($stage-ink, .78) 22%, rgba($stage-ink, .95) 40%, rgba($stage-ink, .8) 60%, rgba($stage-ink, .95) 100%);
}
// 브러시드 메탈 하이라이트 — 가는 빛줄기가 바 전체를 좌우로 훑는다 (이 항목의 유일한 애니메이션)
.nav-c::after {
  content: "";
  position: absolute;
  top: 0;
  left: -20%;
  width: 14%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba($stage-paper, .55), transparent);
  animation: glint $duration $easing infinite;
}
.nav-c__brand {
  position: relative;
  z-index: 1;
  flex-shrink: 0;
  white-space: nowrap;
  padding-left: $sp-2;
  color: $stage-paper;
  font-weight: 700;
  font-size: clamp(12px, 3vw, 14px);
  line-height: 1;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
}
.nav-c__menu { position: relative; z-index: 1; min-width: 0; flex: 1; display: flex; }
.nav-c__label {
  flex: 1;
  white-space: nowrap;
  text-align: center;
  padding: $sp-2 0;
  color: rgba($stage-paper, .8);
  font-weight: 600;
  font-size: clamp(10.5px, 2.6vw, 12px);
  line-height: 1;
  font-family: inherit;
}
.nav-c__label--active { color: $stage-paper; border-radius: $r-pill; background: rgba($stage-paper, .12); }
.nav-c__cta {
  position: relative;
  z-index: 1;
  flex-shrink: 0;
  white-space: nowrap;
  border: 0;
  border-radius: $r-pill;
  background: $stage-paper;
  color: $stage-ink;
  padding: $sp-2 $sp-4;
  font-weight: 700;
  font-size: clamp(10.5px, 2.6vw, 12px);
  line-height: 1;
  font-family: inherit;
}

@keyframes glint { 0% { left: -20%; } 100% { left: 106%; } }

@media (prefers-reduced-motion: reduce) {
  .nav-c::after { animation: none; opacity: 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);
}

.nav-c {
  position: relative;
  overflow: hidden;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  gap: 12px;
  width: clamp(240px, 84vw, 380px);
  padding: 8px 12px;
  border-radius: 999px;
  background: linear-gradient(100deg, rgba(23, 20, 26, 0.92) 0%, rgba(23, 20, 26, 0.78) 22%, rgba(23, 20, 26, 0.95) 40%, rgba(23, 20, 26, 0.8) 60%, rgba(23, 20, 26, 0.95) 100%);
}

.nav-c::after {
  content: "";
  position: absolute;
  top: 0;
  left: -20%;
  width: 14%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.55), transparent);
  animation: glint 2s linear infinite;
}

.nav-c__brand {
  position: relative;
  z-index: 1;
  flex-shrink: 0;
  white-space: nowrap;
  padding-left: 8px;
  color: #ffffff;
  font-weight: 700;
  font-size: clamp(12px, 3vw, 14px);
  line-height: 1;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
}

.nav-c__menu {
  position: relative;
  z-index: 1;
  min-width: 0;
  flex: 1;
  display: flex;
}

.nav-c__label {
  flex: 1;
  white-space: nowrap;
  text-align: center;
  padding: 8px 0;
  color: rgba(255, 255, 255, 0.8);
  font-weight: 600;
  font-size: clamp(10.5px, 2.6vw, 12px);
  line-height: 1;
  font-family: inherit;
}

.nav-c__label--active {
  color: #ffffff;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
}

.nav-c__cta {
  position: relative;
  z-index: 1;
  flex-shrink: 0;
  white-space: nowrap;
  border: 0;
  border-radius: 999px;
  background: #ffffff;
  color: #17141a;
  padding: 8px 16px;
  font-weight: 700;
  font-size: clamp(10.5px, 2.6vw, 12px);
  line-height: 1;
  font-family: inherit;
}

@keyframes glint {
  0% {
    left: -20%;
  }
  100% {
    left: 106%;
  }
}
@media (prefers-reduced-motion: reduce) {
  .nav-c::after {
    animation: none;
    opacity: 0;
  }
}

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

export type NavChromeProps = {
  brand?: string;
  links?: string[];
  activeIndex?: number;
  cta?: string;
  /** 한 주기(기본 2000ms) */
  duration?: number;
  easing?: string;
  color?: string;
};

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

export default function NavChrome({
  brand = "Chroma",
  links = ["Home", "Features", "Pricing"],
  activeIndex = 0,
  cta = "Try it free",
  duration = 2000,
  easing = "linear",
  color = "#2f6df6",
}: NavChromeProps) {
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <nav className={styles.nav} style={vars}>
      <span className={styles.brand}>{brand}</span>
      <div className={styles.menu}>
        {links.map((label, i) => (
          <span key={label} className={i === activeIndex ? `${styles.label} ${styles.labelActive}` : styles.label}>
            {label}
          </span>
        ))}
      </div>
      <button type="button" className={styles.cta}>{cta}</button>
    </nav>
  );
}