/* NOH TO THE WORLD - シンプルな静的サイト */

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: #ffffff;
  color: #333333;
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  font-weight: 400;
  line-height: 1.8;
  font-size: 16px;
}

body.menu-open {
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  display: block;
}

ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

/* ==========================================================
   ヘッダー（黒背景・幅いっぱい／ロゴ左端・アイコン右端）
   ========================================================== */
.site-header {
  background: #000000;
  color: #ffffff;
  width: 100%;
  position: relative;
  z-index: 10;
}

.site-header__inner {
  width: 100%;
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  margin-right: auto;
}

.logo img {
  height: 34px;
  width: auto;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 18px;
}

.insta img {
  height: 34px;
  width: 34px;
}

/* ハンバーガーボタン（2本線） */
.hamburger {
  width: 28px;
  height: 15px;
  position: relative;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
}

.hamburger span {
  position: absolute;
  left: 0;
  width: 90%;
  height: 2px;
  background: #ffffff;
  transition: transform 0.3s ease, opacity 0.3s ease, top 0.3s ease, background 0.3s ease;
}

.hamburger span:nth-child(1) {
  top: 0;
}

.hamburger span:nth-child(2) {
  top: 16px;
}

/* ==========================================================
   ナビゲーション（開いたら全画面・白背景でメニューのみ表示）
   ========================================================== */
.site-nav {
  position: fixed;
  inset: 0;
  z-index: 50;
  padding-top: 62px;
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
}

.site-nav.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* 閉じるボタン（メニュー右上） */
.close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 28px;
  height: 28px;
  background: none;
  border: none;
  cursor: pointer;
}

.close-btn span {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 26px;
  height: 2px;
  background: #222222;
}

.close-btn span:nth-child(1) {
  transform: translate(-50%, -50%) rotate(45deg);
}

.close-btn span:nth-child(2) {
  transform: translate(-50%, -50%) rotate(-45deg);
}

.site-nav ul {
  text-align: center;
}

.site-nav li+li {
  margin-top: 22px;
}

.site-nav a {
  display: block;
  font-size: 18px;
  letter-spacing: 0.04em;
  color: #222222;
}

.site-nav a:hover {
  color: #b3492f;
  text-decoration: none;
}

/* ==========================================================
   ページタイトル
   ========================================================== */
.page-title {
  max-width: 800px;
  margin: 0 auto;
  padding: 48px 20px 28px;
  text-align: center;
}

.page-title h1 {
  margin: 0;
  font-size: 30px;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: #222;
}

.page-title__sub {
  margin: 10px 0 0;
  font-size: 16px;
  font-weight: 400;
  color: #444;
}

.page-title__credit {
  margin: 20px 0 0;
  font-size: 14px;
  color: #555;
}

.page-title__coop {
  margin: 6px 0 0;
  font-size: 13px;
  color: #777;
}

/* ==========================================================
   ヒーロー画像（ブラウザ幅いっぱい）
   ========================================================== */
.hero-image {
  width: 100%;
  margin: 0;
}

.hero-image img {
  width: 100%;
  height: auto;
  display: block;
}

/* ==========================================================
   案内メニューリスト（初回スクロール時フェードイン）
   ========================================================== */
.menu-list {
  max-width: 640px;
  margin: 0 auto;
  padding: 72px 20px 88px;
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.menu-list.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.menu-list ul {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.menu-list li {
  width: 100%;
  text-align: center;
  padding-bottom: 10px;
}

.menu-list a {
  font-size: 17px;
  font-weight: 400;
  color: #222;
}

.menu-list a:hover {
  color: #b3492f;
}

/* プライバシーポリシーは上下の余白を多めに */
.menu-list__sub {
  padding-top: 48px;
  padding-bottom: 12px;
}

.menu-list__sub a {
  font-size: 13px;
  font-weight: 400;
  color: #888;
}

/* ==========================================================
   フッター（黒背景・幅いっぱい）
   ========================================================== */
.site-footer {
  background: #000000;
  color: #cccccc;
  width: 100%;
  padding: 40px 20px 32px;
  text-align: center;
  font-size: 13px;
}

.site-footer p {
  margin: 6px 0;
  color: #aaaaaa;
}

.site-footer a {
  color: #aaaaaa;
}

.site-footer a:hover {
  color: #ffffff;
}

/* ==========================================================
   下層ページ共通（記事コンテンツ）
   ========================================================== */

main {
  padding-top: 60px;
  padding-bottom: 60px;
}

.page-content {
  max-width: 720px;
  margin: 0 auto;
  padding: 56px 20px 80px;
}

.page-content h1 {
  margin: 0 0 48px;
  font-size: 24px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: #222;
  text-align: center;
}

.page-content h2 {
  font-size: 18px;
  font-weight: 500;
  margin-bottom: 24px;
}

.page-content h3 {
  font-size: 16px;
  margin-bottom: 16px;
  font-weight: 500;
}

.page-content p {
  margin: 0 0 24px;
  font-size: 15px;
  color: #333;
  line-height: 2;
}

.page-content ul {
  margin: 0 0 48px;
}

.page-content ul li {
  list-style: disc;
  list-style-position: outside;
  margin-left: 1.5rem;
}

.page-content__signature {
  text-align: right;
  font-size: 14px;
  color: #555;
}

.page-content__text-red {
  color: #f00;
}

.page-content__text-blue {
  color: #00f;
}

.page-content__text-green {
  color: #0f0;
}

.page-content .link-list {
  margin: 0 0 48px;
}

.page-content .link-list li {
  padding: 14px 0;
  list-style: none;
  margin-left: 0;
}

.page-content .link-list a {
  font-size: 15px;
  color: #222;
  text-decoration: underline;
}

.page-content .link-list a:hover {
  color: #b3492f;
}

.back-top {
  text-align: center;
  margin-top: 48px;
}

.back-top a {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: #777;
  border-bottom: 1px solid #ccc;
  padding-bottom: 2px;
}

.back-top a:hover {
  color: #222;
  text-decoration: none;
}

.page-content .back-top {
  margin-top: 72px;
  margin-bottom: 24px;
}

.page-content .back-top_link {
  font-size: 20px;
  letter-spacing: 0.06em;
  color: #777;
  text-decoration: none;
  border-bottom: none;
  padding-bottom: 0;
}

.page-content .back-top_link span {
  display: block;
  font-size: 12px;
  margin-top: -5px;
}

.page-content .back-top_link:hover {
  color: #222;
  text-decoration: none;
}

.page-content .back-top_brand {
  display: block;
  margin-top: 14px;
  font-size: 15px;
  letter-spacing: 0.08em;
  color: #333;
  text-decoration: none;
}

.page-content .back-top_brand:hover {
  color: #b3492f;
  text-decoration: none;
}

.mb100{
  margin-bottom: 100px !important;
}

/* ==========================================================
   展示物について（Section A/B/C タブ）
   ========================================================== */
.section-tabs{
  max-width: 720px;
  margin: 0 auto 56px;
  padding: 40px 20px;
  border-top: 1px solid #dddddd;
  border-bottom: 1px solid #dddddd;
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.section-tabs.is-visible{
  opacity: 1;
  transform: translateY(0);
}
.section-tabs ul{
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.section-tabs li{
  text-align: left;
  font-size: 18px;
  color: #333;
  line-height: 1.6;
}
.section-tabs li.is-current{
  font-size: 24px;
  font-weight: 500;
}
.section-tabs li.is-current.is-color-red{
  color: #f00000;
}
.section-tabs li.is-current.is-color-blue{
  color: #0057ff;
}
.section-tabs li.is-current.is-color-green{
  color: #2e8b57;
}
.section-tabs a{
  display: block;
  color: #333;
}
.section-tabs a:hover{
  color: #b3492f;
  text-decoration: none;
}

.page-content figure figcaption{
text-align: center;
margin-bottom: 48px;
}

.page-content .exhibit-photo-box{
  margin: 0 auto 100px;
  max-width: 720px;

}

.page-content .exhibit-photo{
  margin: 0 auto 32px;
  max-width: 480px;
}

.page-content .exhibit-explanation{
  margin: 0 auto 100px;
}

.page-content .exhibit-explanation h4{
  font-size: 16px;
  font-weight: 300;
  margin-bottom: 0;
}

.page-content .exhibit-explanation p{
  font-size: 12px;

}

.section-nav{
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 40px 0 0;
  font-size: 20px;
}
.section-nav a{
  color: #333333;
  letter-spacing: 0.04em;
  text-decoration: underline;
}
.section-nav a:hover{
  text-decoration: none;
}
.section-nav__prev{
  margin-right: auto;
}
.section-nav__next{
  margin-left: auto;
}

.workshop_link{
  text-align: center;
  margin: 30px auto;
}

.workshop_link a{
  display: inline;
  text-align: center;
  background-color: #000000;
  color: #fff;
  padding: 20px;
  border-radius: 15px;
}

/* ==========================================================
   レスポンシブ
   ========================================================== */
@media (max-width: 480px) {
  .page-title h1 {
    font-size: 24px;
  }
}

/* モーション低減設定への配慮 */
@media (prefers-reduced-motion: reduce) {
  .menu-list {
    transition: none;
  }

  .section-tabs {
    transition: none;
  }

  .site-nav {
    transition: none;
  }
}