01単体サイドバーナビ

<main class="stage">
  <nav class="sd is-demo" aria-label="メインメニュー">
    <div class="sd__brand"><span class="sd__mark" aria-hidden="true"></span><span class="sd__brand-text">Studio</span></div>
    <ul class="sd__list">
      <li class="sd__item is-active"><a class="sd__link" href="#"><span class="sd__ic" aria-hidden="true"><svg viewBox="0 0 256 256"><g fill="currentColor"><path d="M216 120v96h-64v-64h-48v64H40v-96a8 8 0 0 1 2.34-5.66l80-80a8 8 0 0 1 11.32 0l80 80A8 8 0 0 1 216 120" opacity=".2"/><path d="m219.31 108.68l-80-80a16 16 0 0 0-22.62 0l-80 80A15.87 15.87 0 0 0 32 120v96a8 8 0 0 0 8 8h64a8 8 0 0 0 8-8v-56h32v56a8 8 0 0 0 8 8h64a8 8 0 0 0 8-8v-96a15.87 15.87 0 0 0-4.69-11.32M208 208h-48v-56a8 8 0 0 0-8-8h-48a8 8 0 0 0-8 8v56H48v-88l80-80l80 80Z"/></g></svg></span><span class="sd__label">ホーム</span></a></li>
      <li class="sd__item"><a class="sd__link" href="#"><span class="sd__ic" aria-hidden="true"><svg viewBox="0 0 256 256"><g fill="currentColor"><path d="M208 88v24H69.77a8 8 0 0 0-7.59 5.47L32 208V64a8 8 0 0 1 8-8h53.33a8 8 0 0 1 4.8 1.6L128 80h72a8 8 0 0 1 8 8" opacity=".2"/><path d="M245 110.64a16 16 0 0 0-13-6.64h-16V88a16 16 0 0 0-16-16h-69.33l-27.73-20.8a16.14 16.14 0 0 0-9.6-3.2H40a16 16 0 0 0-16 16v144a8 8 0 0 0 8 8h179.1a8 8 0 0 0 7.59-5.47l28.49-85.47a16.05 16.05 0 0 0-2.18-14.42M93.34 64l29.86 22.4A8 8 0 0 0 128 88h72v16H69.77a16 16 0 0 0-15.18 10.94L40 158.7V64Zm112 136H43.1l26.67-80H232Z"/></g></svg></span><span class="sd__label">プロジェクト</span></a></li>
      <li class="sd__item"><a class="sd__link" href="#"><span class="sd__ic" aria-hidden="true"><svg viewBox="0 0 256 256"><g fill="currentColor"><path d="M224 128a95.76 95.76 0 0 1-31.8 71.37A72 72 0 0 0 128 160a40 40 0 1 0-40-40a40 40 0 0 0 40 40a72 72 0 0 0-64.2 39.37A96 96 0 1 1 224 128" opacity=".2"/><path d="M128 24a104 104 0 1 0 104 104A104.11 104.11 0 0 0 128 24M74.08 197.5a64 64 0 0 1 107.84 0a87.83 87.83 0 0 1-107.84 0M96 120a32 32 0 1 1 32 32a32 32 0 0 1-32-32m97.76 66.41a79.66 79.66 0 0 0-36.06-28.75a48 48 0 1 0-59.4 0a79.66 79.66 0 0 0-36.06 28.75a88 88 0 1 1 131.52 0"/></g></svg></span><span class="sd__label">チーム</span></a></li>
      <li class="sd__item"><a class="sd__link" href="#"><span class="sd__ic" aria-hidden="true"><svg viewBox="0 0 256 256"><g fill="currentColor"><path d="m230.1 108.76l-31.85-18.14c-.64-1.16-1.31-2.29-2-3.41l-.12-36A104.6 104.6 0 0 0 162 32l-32 17.89h-4L94 32a104.6 104.6 0 0 0-34.11 19.25l-.16 36c-.7 1.12-1.37 2.26-2 3.41l-31.84 18.1a99.2 99.2 0 0 0 0 38.46l31.85 18.14c.64 1.16 1.31 2.29 2 3.41l.12 36A104.6 104.6 0 0 0 94 224l32-17.87h4L162 224a104.6 104.6 0 0 0 34.08-19.25l.16-36c.7-1.12 1.37-2.26 2-3.41l31.84-18.1a99.2 99.2 0 0 0 .02-38.48M128 168a40 40 0 1 1 40-40a40 40 0 0 1-40 40" opacity=".2"/><path d="M128 80a48 48 0 1 0 48 48a48.05 48.05 0 0 0-48-48m0 80a32 32 0 1 1 32-32a32 32 0 0 1-32 32m109.94-52.79a8 8 0 0 0-3.89-5.4l-29.83-17l-.12-33.62a8 8 0 0 0-2.83-6.08a111.9 111.9 0 0 0-36.72-20.67a8 8 0 0 0-6.46.59L128 41.85L97.88 25a8 8 0 0 0-6.47-.6a111.9 111.9 0 0 0-36.68 20.75a8 8 0 0 0-2.83 6.07l-.15 33.65l-29.83 17a8 8 0 0 0-3.89 5.4a106.5 106.5 0 0 0 0 41.56a8 8 0 0 0 3.89 5.4l29.83 17l.12 33.63a8 8 0 0 0 2.83 6.08a111.9 111.9 0 0 0 36.72 20.67a8 8 0 0 0 6.46-.59L128 214.15L158.12 231a7.9 7.9 0 0 0 3.9 1a8.1 8.1 0 0 0 2.57-.42a112.1 112.1 0 0 0 36.68-20.73a8 8 0 0 0 2.83-6.07l.15-33.65l29.83-17a8 8 0 0 0 3.89-5.4a106.5 106.5 0 0 0-.03-41.52m-15 34.91l-28.57 16.25a8 8 0 0 0-3 3c-.58 1-1.19 2.06-1.81 3.06a7.94 7.94 0 0 0-1.22 4.21l-.15 32.25a95.9 95.9 0 0 1-25.37 14.3L134 199.13a8 8 0 0 0-3.91-1h-3.83a8.1 8.1 0 0 0-4.1 1l-28.84 16.1A96 96 0 0 1 67.88 201l-.11-32.2a8 8 0 0 0-1.22-4.22c-.62-1-1.23-2-1.8-3.06a8.1 8.1 0 0 0-3-3.06l-28.6-16.29a90.5 90.5 0 0 1 0-28.26l28.52-16.28a8 8 0 0 0 3-3c.58-1 1.19-2.06 1.81-3.06a7.94 7.94 0 0 0 1.22-4.21l.15-32.25a95.9 95.9 0 0 1 25.37-14.3L122 56.87a8 8 0 0 0 4.1 1h3.64a8 8 0 0 0 4.1-1l28.84-16.1A96 96 0 0 1 188.12 55l.11 32.2a8 8 0 0 0 1.22 4.22c.62 1 1.23 2 1.8 3.06a8.1 8.1 0 0 0 3 3.06l28.6 16.29a90.5 90.5 0 0 1 .05 28.29Z"/></g></svg></span><span class="sd__label">設定</span></a></li>
    </ul>
    <button class="sd__toggle" type="button" aria-label="サイドバーの折りたたみ/展開" aria-pressed="false">
      <span class="sd__toggle-ic" aria-hidden="true"><svg viewBox="0 0 256 256"><g fill="currentColor"><path d="M160 48v160l-80-80Z" opacity=".2"/><path d="M163.06 40.61a8 8 0 0 0-8.72 1.73l-80 80a8 8 0 0 0 0 11.32l80 80A8 8 0 0 0 168 208V48a8 8 0 0 0-4.94-7.39M152 188.69L91.31 128L152 67.31Z"/></g></svg></span>
    </button>
  </nav>
</main>

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

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

@include stage($stage-ink);

.sd {
  box-sizing: border-box;
  width: 208px;
  max-width: 78vw;
  height: 268px;
  max-height: 84vh;
  display: flex;
  flex-direction: column;
  border-radius: $r-card;
  padding: $sp-4 $sp-3;
  background: rgba(255, 247, 230, .04);
  border: 1px solid rgba(255, 247, 230, .12);
  overflow: hidden;
  transition: width $duration $easing;
}
.sd.is-collapsed { width: 76px; }

.sd__brand {
  display: flex; align-items: center; gap: $sp-2;
  margin-bottom: $sp-5;
  overflow: hidden;
}
.sd__mark {
  flex: 0 0 auto;
  width: $sp-5; height: $sp-5;
  border-radius: $r-xs;
  background: $color;
}
.sd__brand-text {
  font-weight: 800; font-size: 13px; line-height: 1; font-family: inherit;
  color: $subject-cream;
  white-space: nowrap;
  transition: opacity $duration $easing;
}
.sd.is-collapsed .sd__brand-text { opacity: 0; }

.sd__list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: $sp-1; flex: 1; }
.sd__item { position: relative; border-radius: $r-control; }
.sd__link {
  position: relative;
  display: flex; align-items: center; gap: $sp-3;
  padding: $sp-2 $sp-3;
  border-radius: $r-control;
  text-decoration: none;
  color: rgba(255, 247, 230, .62);
  overflow: hidden;
  transition: background $duration $easing, color $duration $easing;
}
.sd__item.is-active .sd__link { background: rgba(255, 247, 230, .1); color: $subject-cream; }
.sd__item.is-active .sd__link::before {
  content: "";
  position: absolute; left: 0; top: 18%; bottom: 18%;
  width: 3px; border-radius: $r-xs;
  background: $color;
}
.sd__ic { flex: 0 0 auto; width: $sp-4; height: $sp-4; opacity: .8; }
.sd__ic svg { display: block; width: 100%; height: 100%; }
.sd__label { font-weight: 600; font-size: 12px; line-height: 1; font-family: inherit; white-space: nowrap; transition: opacity $duration $easing; }
.sd.is-collapsed .sd__label { opacity: 0; }

.sd__toggle {
  flex: 0 0 auto;
  align-self: flex-end;
  width: $sp-6; height: $sp-6;
  margin-top: $sp-3;
  border-radius: $r-pill;
  border: 1px solid rgba(255, 247, 230, .2);
  background: transparent;
  cursor: pointer;
  display: grid; place-items: center;
}
.sd__toggle-ic {
  width: 14px; height: 14px;
  color: $subject-cream;   // Phosphor duotone(caret-left): g fill="currentColor" 가 이 값을 물려받는다
  transform: rotate(0deg);
  transition: transform $duration $easing;
}
.sd__toggle-ic svg { display: block; width: 100%; height: 100%; }
.sd.is-collapsed ~ .sd__toggle .sd__toggle-ic,
.sd.is-collapsed .sd__toggle-ic { transform: rotate(180deg); }

// ── 자동 루프(무조건 재생): 펼침 ↔ 접힘을 2초 주기로 오간다 ──────────────
.sd.is-demo { animation: sd-breathe 2s ease-in-out infinite; }
.sd.is-demo .sd__brand-text,
.sd.is-demo .sd__label { animation: sd-fade 2s ease-in-out infinite; }
.sd.is-demo .sd__toggle-ic { animation: sd-rotate 2s ease-in-out infinite; }
@keyframes sd-breathe {
  0%, 20%, 100% { width: 208px; }
  50%, 70%      { width: 76px; }
}
@keyframes sd-fade {
  0%, 20%, 100% { opacity: 1; }
  50%, 70%      { opacity: 0; }
}
@keyframes sd-rotate {
  0%, 20%, 100% { transform: rotate(0deg); }
  50%, 70%      { transform: rotate(180deg); }
}

@media (max-width: 340px), (max-height: 220px) {
  .sd { width: 168px; padding: $sp-3 $sp-2; }
  .sd__brand { margin-bottom: $sp-3; }
  .sd.is-demo { animation-duration: 2s; }
}

@media (prefers-reduced-motion: reduce) {
  .sd.is-demo,
  .sd.is-demo .sd__brand-text,
  .sd.is-demo .sd__label,
  .sd.is-demo .sd__toggle-ic { animation: none !important; }
  .sd, .sd__brand-text, .sd__label, .sd__toggle-ic { transition: none; }
}

html, body {
  margin: 0;
  overflow: hidden;
}

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #17141a;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.sd {
  box-sizing: border-box;
  width: 208px;
  max-width: 78vw;
  height: 268px;
  max-height: 84vh;
  display: flex;
  flex-direction: column;
  border-radius: 16px;
  padding: 16px 12px;
  background: rgba(255, 247, 230, 0.04);
  border: 1px solid rgba(255, 247, 230, 0.12);
  overflow: hidden;
  transition: width 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.sd.is-collapsed {
  width: 76px;
}

.sd__brand {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  overflow: hidden;
}

.sd__mark {
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  border-radius: 4px;
  background: #2f6df6;
}

.sd__brand-text {
  font-weight: 800;
  font-size: 13px;
  line-height: 1;
  font-family: inherit;
  color: #fff7e6;
  white-space: nowrap;
  transition: opacity 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.sd.is-collapsed .sd__brand-text {
  opacity: 0;
}

.sd__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.sd__item {
  position: relative;
  border-radius: 12px;
}

.sd__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 12px;
  border-radius: 12px;
  text-decoration: none;
  color: rgba(255, 247, 230, 0.62);
  overflow: hidden;
  transition: background 300ms cubic-bezier(0.2, 0.8, 0.2, 1), color 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.sd__item.is-active .sd__link {
  background: rgba(255, 247, 230, 0.1);
  color: #fff7e6;
}

.sd__item.is-active .sd__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18%;
  bottom: 18%;
  width: 3px;
  border-radius: 4px;
  background: #2f6df6;
}

.sd__ic {
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  opacity: 0.8;
}

.sd__ic svg {
  display: block;
  width: 100%;
  height: 100%;
}

.sd__label {
  font-weight: 600;
  font-size: 12px;
  line-height: 1;
  font-family: inherit;
  white-space: nowrap;
  transition: opacity 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.sd.is-collapsed .sd__label {
  opacity: 0;
}

.sd__toggle {
  flex: 0 0 auto;
  align-self: flex-end;
  width: 24px;
  height: 24px;
  margin-top: 12px;
  border-radius: 999px;
  border: 1px solid rgba(255, 247, 230, 0.2);
  background: transparent;
  cursor: pointer;
  display: grid;
  place-items: center;
}

.sd__toggle-ic {
  width: 14px;
  height: 14px;
  color: #fff7e6;
  transform: rotate(0deg);
  transition: transform 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.sd__toggle-ic svg {
  display: block;
  width: 100%;
  height: 100%;
}

.sd.is-collapsed ~ .sd__toggle .sd__toggle-ic,
.sd.is-collapsed .sd__toggle-ic {
  transform: rotate(180deg);
}

.sd.is-demo {
  animation: sd-breathe 2s ease-in-out infinite;
}

.sd.is-demo .sd__brand-text,
.sd.is-demo .sd__label {
  animation: sd-fade 2s ease-in-out infinite;
}

.sd.is-demo .sd__toggle-ic {
  animation: sd-rotate 2s ease-in-out infinite;
}

@keyframes sd-breathe {
  0%, 20%, 100% {
    width: 208px;
  }
  50%, 70% {
    width: 76px;
  }
}
@keyframes sd-fade {
  0%, 20%, 100% {
    opacity: 1;
  }
  50%, 70% {
    opacity: 0;
  }
}
@keyframes sd-rotate {
  0%, 20%, 100% {
    transform: rotate(0deg);
  }
  50%, 70% {
    transform: rotate(180deg);
  }
}
@media (max-width: 340px), (max-height: 220px) {
  .sd {
    width: 168px;
    padding: 12px 8px;
  }
  .sd__brand {
    margin-bottom: 12px;
  }
  .sd.is-demo {
    animation-duration: 2s;
  }
}
@media (prefers-reduced-motion: reduce) {
  .sd.is-demo,
  .sd.is-demo .sd__brand-text,
  .sd.is-demo .sd__label,
  .sd.is-demo .sd__toggle-ic {
    animation: none !important;
  }
  .sd, .sd__brand-text, .sd__label, .sd__toggle-ic {
    transition: none;
  }
}

// 실제 동작: 버튼을 누르면 사이드바 폭이 실제로 줄어들고 라벨이 사라진다. 첫 클릭에 자동 루프(is-demo)를 멈춘다.
var nav = document.querySelector('.sd');
var btn = document.querySelector('.sd__toggle');
btn.addEventListener('click', function () {
  nav.classList.remove('is-demo');
  var collapsed = nav.classList.toggle('is-collapsed');
  btn.setAttribute('aria-pressed', String(collapsed));
});

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

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

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

const ITEMS = ["홈", "프로젝트", "팀", "설정"];

// Phosphor Duotone(MIT) — house · folder-open · user-circle · gear-six, ITEMS 와 같은 순서
const ICONS = [
  <g key="house" fill="currentColor"><path d="M216 120v96h-64v-64h-48v64H40v-96a8 8 0 0 1 2.34-5.66l80-80a8 8 0 0 1 11.32 0l80 80A8 8 0 0 1 216 120" opacity=".2" /><path d="m219.31 108.68l-80-80a16 16 0 0 0-22.62 0l-80 80A15.87 15.87 0 0 0 32 120v96a8 8 0 0 0 8 8h64a8 8 0 0 0 8-8v-56h32v56a8 8 0 0 0 8 8h64a8 8 0 0 0 8-8v-96a15.87 15.87 0 0 0-4.69-11.32M208 208h-48v-56a8 8 0 0 0-8-8h-48a8 8 0 0 0-8 8v56H48v-88l80-80l80 80Z" /></g>,
  <g key="folder" fill="currentColor"><path d="M208 88v24H69.77a8 8 0 0 0-7.59 5.47L32 208V64a8 8 0 0 1 8-8h53.33a8 8 0 0 1 4.8 1.6L128 80h72a8 8 0 0 1 8 8" opacity=".2" /><path d="M245 110.64a16 16 0 0 0-13-6.64h-16V88a16 16 0 0 0-16-16h-69.33l-27.73-20.8a16.14 16.14 0 0 0-9.6-3.2H40a16 16 0 0 0-16 16v144a8 8 0 0 0 8 8h179.1a8 8 0 0 0 7.59-5.47l28.49-85.47a16.05 16.05 0 0 0-2.18-14.42M93.34 64l29.86 22.4A8 8 0 0 0 128 88h72v16H69.77a16 16 0 0 0-15.18 10.94L40 158.7V64Zm112 136H43.1l26.67-80H232Z" /></g>,
  <g key="user" fill="currentColor"><path d="M224 128a95.76 95.76 0 0 1-31.8 71.37A72 72 0 0 0 128 160a40 40 0 1 0-40-40a40 40 0 0 0 40 40a72 72 0 0 0-64.2 39.37A96 96 0 1 1 224 128" opacity=".2" /><path d="M128 24a104 104 0 1 0 104 104A104.11 104.11 0 0 0 128 24M74.08 197.5a64 64 0 0 1 107.84 0a87.83 87.83 0 0 1-107.84 0M96 120a32 32 0 1 1 32 32a32 32 0 0 1-32-32m97.76 66.41a79.66 79.66 0 0 0-36.06-28.75a48 48 0 1 0-59.4 0a79.66 79.66 0 0 0-36.06 28.75a88 88 0 1 1 131.52 0" /></g>,
  <g key="gear" fill="currentColor"><path d="m230.1 108.76l-31.85-18.14c-.64-1.16-1.31-2.29-2-3.41l-.12-36A104.6 104.6 0 0 0 162 32l-32 17.89h-4L94 32a104.6 104.6 0 0 0-34.11 19.25l-.16 36c-.7 1.12-1.37 2.26-2 3.41l-31.84 18.1a99.2 99.2 0 0 0 0 38.46l31.85 18.14c.64 1.16 1.31 2.29 2 3.41l.12 36A104.6 104.6 0 0 0 94 224l32-17.87h4L162 224a104.6 104.6 0 0 0 34.08-19.25l.16-36c.7-1.12 1.37-2.26 2-3.41l31.84-18.1a99.2 99.2 0 0 0 .02-38.48M128 168a40 40 0 1 1 40-40a40 40 0 0 1-40 40" opacity=".2" /><path d="M128 80a48 48 0 1 0 48 48a48.05 48.05 0 0 0-48-48m0 80a32 32 0 1 1 32-32a32 32 0 0 1-32 32m109.94-52.79a8 8 0 0 0-3.89-5.4l-29.83-17l-.12-33.62a8 8 0 0 0-2.83-6.08a111.9 111.9 0 0 0-36.72-20.67a8 8 0 0 0-6.46.59L128 41.85L97.88 25a8 8 0 0 0-6.47-.6a111.9 111.9 0 0 0-36.68 20.75a8 8 0 0 0-2.83 6.07l-.15 33.65l-29.83 17a8 8 0 0 0-3.89 5.4a106.5 106.5 0 0 0 0 41.56a8 8 0 0 0 3.89 5.4l29.83 17l.12 33.63a8 8 0 0 0 2.83 6.08a111.9 111.9 0 0 0 36.72 20.67a8 8 0 0 0 6.46-.59L128 214.15L158.12 231a7.9 7.9 0 0 0 3.9 1a8.1 8.1 0 0 0 2.57-.42a112.1 112.1 0 0 0 36.68-20.73a8 8 0 0 0 2.83-6.07l.15-33.65l29.83-17a8 8 0 0 0 3.89-5.4a106.5 106.5 0 0 0-.03-41.52m-15 34.91l-28.57 16.25a8 8 0 0 0-3 3c-.58 1-1.19 2.06-1.81 3.06a7.94 7.94 0 0 0-1.22 4.21l-.15 32.25a95.9 95.9 0 0 1-25.37 14.3L134 199.13a8 8 0 0 0-3.91-1h-3.83a8.1 8.1 0 0 0-4.1 1l-28.84 16.1A96 96 0 0 1 67.88 201l-.11-32.2a8 8 0 0 0-1.22-4.22c-.62-1-1.23-2-1.8-3.06a8.1 8.1 0 0 0-3-3.06l-28.6-16.29a90.5 90.5 0 0 1 0-28.26l28.52-16.28a8 8 0 0 0 3-3c.58-1 1.19-2.06 1.81-3.06a7.94 7.94 0 0 0 1.22-4.21l.15-32.25a95.9 95.9 0 0 1 25.37-14.3L122 56.87a8 8 0 0 0 4.1 1h3.64a8 8 0 0 0 4.1-1l28.84-16.1A96 96 0 0 1 188.12 55l.11 32.2a8 8 0 0 0 1.22 4.22c.62 1 1.23 2 1.8 3.06a8.1 8.1 0 0 0 3 3.06l28.6 16.29a90.5 90.5 0 0 1 .05 28.29Z" /></g>,
];

const CARET_LEFT = (
  <g fill="currentColor"><path d="M160 48v160l-80-80Z" opacity=".2" /><path d="M163.06 40.61a8 8 0 0 0-8.72 1.73l-80 80a8 8 0 0 0 0 11.32l80 80A8 8 0 0 0 168 208V48a8 8 0 0 0-4.94-7.39M152 188.69L91.31 128L152 67.31Z" /></g>
);

export default function Sidebar({ duration = 300, easing = "cubic-bezier(.2,.8,.2,1)", color = "#2f6df6" }: SidebarProps) {
  const [collapsed, setCollapsed] = useState(false);
  const [active, setActive] = useState(0);
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <nav className={`${styles.sd} ${collapsed ? styles.collapsed : ""}`} style={vars} aria-label="주 메뉴">
      <div className={styles.brand}>
        <span className={styles.mark} aria-hidden="true" />
        <span className={styles.brandText}>Studio</span>
      </div>
      <ul className={styles.list}>
        {ITEMS.map((label, i) => (
          <li key={label} className={i === active ? styles.active : undefined}>
            <a className={styles.link} href="#" onClick={(e: { preventDefault: () => void }) => { e.preventDefault(); setActive(i); }}>
              <span className={styles.ic} aria-hidden="true">
                <svg viewBox="0 0 256 256">{ICONS[i]}</svg>
              </span>
              <span className={styles.label}>{label}</span>
            </a>
          </li>
        ))}
      </ul>
      <button
        type="button"
        className={styles.toggle}
        aria-label="사이드바 접기/펼치기"
        aria-pressed={collapsed}
        onClick={() => setCollapsed((v) => !v)}
      >
        <span className={styles.toggleIc} aria-hidden="true">
          <svg viewBox="0 0 256 256">{CARET_LEFT}</svg>
        </span>
      </button>
    </nav>
  );
}