/*
Theme Name: Kuu
Theme URI: https://example.com
Author: Akirasasano
Author URI: https://example.com
Description: Simple, Minimal, and Fast WordPress Theme
Version: 1.0.0
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: kuu
Tags: blog, minimal, responsive
*/

/* ===========================
   Design Tokens
   =========================== */
:root {
  --color-black:      #0a0a0a;
  --color-white:      #ffffff;
  --color-gray-light: #f5f5f5;
  --color-gray-mid:   #e0e0e0;
  --color-gray-sub:   #999999;
  --color-text:       #0a0a0a;

  /* カラーテーマ変数（カスタマイザーで切り替え） */
  --color-theme:      var(--color-theme); /* ヘッダー・フッター・アクセントの基本色 */
  --color-theme-text: #ffffff; /* ヘッダー・フッター内のテキスト色 */
  --color-bg:         #ffffff; /* ページ背景色 */

  --font-weight-thin:    200;
  --font-weight-light:   300;
  --font-weight-regular: 400;

  --spacing-section-pc:     120px;
  --spacing-section-sp:      72px;
  --letter-spacing-wide:   0.12em;
  --letter-spacing-wider:  0.18em;
}

/* ===========================
   Reset & Base
   =========================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: auto;
}

body {
  font-family: "游ゴシック体", "Yu Gothic", YuGothic, -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  font-weight: var(--font-weight-light);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
  list-style: none;
}

/* ===========================
   Typography
   =========================== */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-light);
  line-height: 1.4;
  letter-spacing: 0.05em;
}

p {
  margin-bottom: 1.5rem;
}

p:last-child {
  margin-bottom: 0;
}

/* ===========================
   Layout
   =========================== */
.container {
  width: 100%;
  max-width: 1400px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 40px;
  padding-right: 40px;
}

.container--narrow {
  max-width: 860px;
}

/* ===========================
   Header
   =========================== */
.site-header {
  background-color: var(--color-theme);
  color: var(--color-theme-text);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background-color 0.3s ease;
}

/* トップページ：ヒーロー上では透明 */
body.home .site-header {
  background-color: transparent;
}

/* トップページ：ヒーローを過ぎたらネイビーに戻す */
body.home .site-header.is-scrolled {
  background-color: var(--color-theme);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.site-header__logo {
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: none;
  color: var(--color-theme-text);
}

.site-header__logo:hover {
  opacity: 0.7;
}

/* ===========================
   Navigation
   =========================== */
.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

.site-nav__item a {
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-theme-text);
  opacity: 0.8;
  transition: opacity 0.2s;
}

.site-nav__item a:hover {
  opacity: 1;
}

/* hamburger (mobile) */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--color-theme-text);
}

.nav-toggle__bar {
  display: block;
  width: 20px;
  height: 1px;
  background: var(--color-theme-text);
  margin: 6px 0;
}

/* ===========================
   Hero
   =========================== */
.hero {
  position: relative;
  width: 100%;
  height: 70vh;
  min-height: 440px;
  overflow: hidden;
  background-color: var(--color-black);
}

/* トップページ：ヒーローをヘッダー分（56px）だけ引き上げ、
   透明ヘッダーの後ろをヒーロー画像で埋めて白帯を消す */
body.home .hero {
  margin-top: -56px;
}

.hero__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.28);
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero__content {
  text-align: center;
  color: var(--color-white);
  padding: 0 40px;
}

.hero__tagline {
  font-size: clamp(1.5rem, 4vw, 3.25rem);
  font-weight: var(--font-weight-thin);
  letter-spacing: 0.1em;
  line-height: 1.3;
  margin-bottom: 1.25rem;
  text-transform: none;
}

.hero__sub {
  font-size: clamp(0.75rem, 1.5vw, 0.875rem);
  font-weight: var(--font-weight-light);
  opacity: 0.85;
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
}

/* ===========================
   Article Slider
   =========================== */
.slider-section {
  padding: var(--spacing-section-pc) 0;
  background-color: var(--color-white);
  border-top: 1px solid var(--color-gray-mid);
}

.slider-viewport {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 40px;
  overflow: hidden;
}

.slider__track {
  display: flex;
  transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  will-change: transform;
}

.slider__card {
  flex: 0 0 calc(100% / 3);
  padding: 0 16px;
}

.slider__thumb {
  display: block;
  overflow: hidden;
  background-color: var(--color-gray-light);
  aspect-ratio: 16 / 10;
  margin-bottom: 20px;
}

.slider__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.slider__thumb:hover img {
  transform: scale(1.03);
}

.slider__body {
  padding: 0 2px;
}

.slider__title {
  font-size: 0.875rem;
  font-weight: var(--font-weight-light);
  line-height: 1.6;
  letter-spacing: 0.04em;
  margin-bottom: 10px;
}

.slider__title a:hover {
  opacity: 0.6;
}

.slider__date {
  display: block;
  font-size: 0.6875rem;
  letter-spacing: var(--letter-spacing-wide);
  color: var(--color-gray-sub);
  text-transform: uppercase;
}

/* ===========================
   Section
   =========================== */
.section {
  padding: var(--spacing-section-pc) 0;
}

.section__title {
  font-size: 0.6875rem;
  font-weight: var(--font-weight-light);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  color: var(--color-gray-sub);
  margin-bottom: 56px;
}

/* ===========================
   Post Grid
   =========================== */
.post-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 56px 40px;
}

.post-card {
  display: flex;
  flex-direction: column;
}

.post-card__thumb {
  display: block;
  overflow: hidden;
  background-color: var(--color-gray-light);
  aspect-ratio: 16 / 10;
  margin-bottom: 24px;
}

.post-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.post-card__thumb:hover img {
  transform: scale(1.03);
}

.post-card__meta {
  font-size: 0.6875rem;
  letter-spacing: var(--letter-spacing-wide);
  color: var(--color-gray-sub);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 14px;
  text-transform: uppercase;
}

.post-card__category {
  color: var(--color-black);
  font-weight: var(--font-weight-light);
}

.post-card__title {
  font-size: 0.9375rem;
  font-weight: var(--font-weight-light);
  line-height: 1.6;
  letter-spacing: 0.03em;
}

.post-card__title a:hover {
  opacity: 0.6;
}

.post-card__excerpt {
  font-size: 0.8125rem;
  color: var(--color-gray-sub);
  line-height: 1.8;
  margin-top: 12px;
}

/* ===========================
   Pagination
   =========================== */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 4px;
  padding: 72px 0;
}

.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  font-size: 0.75rem;
  font-weight: var(--font-weight-light);
  letter-spacing: 0.04em;
  border: 1px solid var(--color-gray-mid);
  color: var(--color-text);
  transition: border-color 0.2s, color 0.2s;
}

.pagination .current {
  background-color: var(--color-black);
  border-color: var(--color-black);
  color: var(--color-white);
}

.pagination a:hover {
  border-color: var(--color-black);
}

/* ===========================
   Single Post
   =========================== */
.post-header {
  padding: 88px 0 64px;
  border-bottom: 1px solid var(--color-gray-mid);
  margin-bottom: 72px;
}

.post-header__meta {
  font-size: 0.6875rem;
  letter-spacing: var(--letter-spacing-wide);
  color: var(--color-gray-sub);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  text-transform: uppercase;
}

.post-header__category {
  color: var(--color-black);
  font-weight: var(--font-weight-light);
}

.post-header__title {
  font-size: clamp(1.5rem, 3vw, 2.75rem);
  font-weight: var(--font-weight-thin);
  letter-spacing: 0.04em;
  line-height: 1.35;
}

.post-thumbnail {
  margin-bottom: 72px;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: var(--color-gray-light);
}

.post-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 記事ヘッダー内アイキャッチ（タイトル上部） */
.post-header__thumbnail {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: var(--color-gray-light);
  margin-bottom: 40px;
}

.post-header__thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Entry Content */
.entry-content {
  font-size: 0.9375rem;
  line-height: 2;
  color: #333333;
  font-weight: var(--font-weight-light);
}

.entry-content h2 {
  font-size: 1.25rem;
  font-weight: var(--font-weight-light);
  border-left: 1px solid var(--color-black);
  padding-left: 18px;
  margin: 3rem 0 1.5rem;
  letter-spacing: 0.04em;
}

.entry-content h3 {
  font-size: 1.0625rem;
  font-weight: var(--font-weight-light);
  margin: 2.5rem 0 1.25rem;
  letter-spacing: 0.03em;
}

.entry-content p {
  margin-bottom: 1.75rem;
}

.entry-content img {
  margin: 2.5rem 0;
}

.entry-content ul,
.entry-content ol {
  margin: 1.5rem 0 1.75rem 1.5rem;
}

.entry-content ul { list-style: disc; }
.entry-content ol { list-style: decimal; }

.entry-content li {
  margin-bottom: 0.5rem;
}

.entry-content blockquote {
  border-left: 1px solid var(--color-gray-mid);
  padding: 0.75rem 0 0.75rem 1.75rem;
  margin: 2.5rem 0;
  color: var(--color-gray-sub);
  font-style: normal;
  letter-spacing: 0.03em;
}

.entry-content a {
  color: var(--color-black);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: var(--color-gray-mid);
}

.entry-content a:hover {
  text-decoration-color: var(--color-black);
}

.entry-content pre {
  background: var(--color-gray-light);
  padding: 1.75rem;
  overflow-x: auto;
  font-size: 0.8125rem;
  line-height: 1.7;
  margin: 2.5rem 0;
}

.entry-content code {
  font-family: "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.8125em;
  background: var(--color-gray-light);
  padding: 0.15em 0.45em;
}

.entry-content pre code {
  background: none;
  padding: 0;
}

/* ===========================
   目次（TOC）
   =========================== */

/* チェックボックス本体は非表示（CSSトグルのトリガーのみ） */
.toc__checkbox {
  display: none;
}

.toc {
  border: 1px solid var(--color-gray-mid);
  background: var(--color-gray-light);
  padding: 20px 24px;
  margin-bottom: 48px;
  font-size: 0.875rem;
}

/* ラベル：目次タイトルとトグルボタンを横並び */
.toc__label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
}

.toc__title {
  font-size: 0.6875rem;
  font-weight: var(--font-weight-light);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  color: var(--color-gray-sub);
}

.toc__open,
.toc__close {
  font-size: 0.6875rem;
  color: var(--color-gray-sub);
  letter-spacing: 0.04em;
}

/* デフォルト：「非表示▲」は隠す */
.toc__close {
  display: none;
}

/* チェック時：目次を表示 */
.toc__checkbox:checked ~ .toc__nav {
  display: block;
}

/* チェック時：「表示する▼」→「非表示▲」に切り替え */
.toc__checkbox:checked ~ .toc__label .toc__open {
  display: none;
}

.toc__checkbox:checked ~ .toc__label .toc__close {
  display: inline;
}

/* 目次ナビ：デフォルトは折りたたみ */
.toc__nav {
  display: none;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--color-gray-mid);
}

/* entry-content ol { list-style: decimal } の詳細度(0-1-1)に勝つため
   .toc .toc__list (0-2-0) で上書き */
.toc .toc__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  list-style: none;   /* decimal の上書き */
  margin: 0;          /* entry-content ol のマージンをリセット */
  padding-left: 0;
}

/* entry-content li { margin-bottom: 0.5rem } をリセット（gap で管理） */
.toc .toc__item {
  margin-bottom: 0;
}

/* H2 アイテム */
.toc__item--h2 {
  display: flex;
}

/* H3 アイテム：インデント */
.toc__item--h3 {
  padding-left: 1.5em;
}

.toc__link {
  display: flex;
  align-items: baseline;
  gap: 6px;
  color: var(--color-text);
  line-height: 1.6;
  transition: color 0.2s;
}

.toc__link:hover {
  color: var(--color-gray-sub);
}

/* H2 の番号（1. 2. 3.） */
.toc__num {
  font-size: 0.75em;
  color: var(--color-gray-sub);
  flex-shrink: 0;
  min-width: 1.5em;
}

/* SNSシェアボタン */
.post-share {
  border-top: 1px solid var(--color-gray-mid);
  margin-top: 72px;
  padding-top: 40px;
  text-align: center;
}

.post-share__label {
  font-size: 0.6875rem;
  font-weight: var(--font-weight-light);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  color: var(--color-gray-sub);
  margin-bottom: 20px;
}

.post-share__buttons {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
}

.post-share__link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--color-gray-sub);
  transition: color 0.2s;
}

.post-share__link:hover {
  color: var(--color-black);
}

.post-share__icon {
  width: 20px;
  height: 20px;
}

/* 著者情報 */
.post-author {
  border-top: 1px solid var(--color-gray-mid);
  margin-top: 48px;
  padding-top: 40px;
}

.post-author__label {
  font-size: 0.6875rem;
  font-weight: var(--font-weight-light);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  color: var(--color-gray-sub);
  margin-bottom: 20px;
}

.post-author__inner {
  display: flex;
  align-items: flex-start;
  gap: 24px;
}

.post-author__avatar {
  flex-shrink: 0;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  overflow: hidden;
  background-color: var(--color-gray-light);
}

.post-author__avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.post-author__body {
  flex: 1;
  min-width: 0;
}

.post-author__name {
  font-size: 0.9375rem;
  font-weight: var(--font-weight-regular);
  letter-spacing: 0.04em;
  margin-bottom: 10px;
}

.post-author__bio {
  font-size: 0.8125rem;
  color: var(--color-gray-sub);
  line-height: 1.8;
  margin-bottom: 0;
}

/* 関連記事 */
.related-posts {
  border-top: 1px solid var(--color-gray-mid);
  margin-top: 48px;
  padding-top: 40px;
}

.related-posts__label {
  font-size: 0.6875rem;
  font-weight: var(--font-weight-light);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  color: var(--color-gray-sub);
  margin-bottom: 24px;
}

.related-posts__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.related-posts__item {
  display: flex;
  flex-direction: column;
}

.related-posts__thumb {
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background-color: var(--color-gray-light);
  margin-bottom: 16px;
}

.related-posts__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.related-posts__thumb:hover img {
  transform: scale(1.03);
}

.related-posts__no-image {
  width: 100%;
  height: 100%;
  background-color: var(--color-gray-light);
}

.related-posts__body {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.related-posts__title {
  font-size: 0.875rem;
  font-weight: var(--font-weight-light);
  line-height: 1.6;
  letter-spacing: 0.03em;
  margin-bottom: 0;
}

.related-posts__title a:hover {
  opacity: 0.6;
}

.related-posts__date {
  font-size: 0.6875rem;
  letter-spacing: var(--letter-spacing-wide);
  color: var(--color-gray-sub);
  text-transform: uppercase;
}

@media (max-width: 480px) {
  .related-posts__grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

/* Post Navigation */
.post-nav {
  border-top: 1px solid var(--color-gray-mid);
  margin-top: 88px;
  padding-top: 56px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.post-nav__label {
  font-size: 0.6875rem;
  font-weight: var(--font-weight-light);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  color: var(--color-gray-sub);
  margin-bottom: 10px;
}

.post-nav__title {
  font-size: 0.875rem;
  font-weight: var(--font-weight-light);
  line-height: 1.6;
  letter-spacing: 0.03em;
}

.post-nav__title a:hover {
  opacity: 0.6;
}

.post-nav__next {
  text-align: right;
}

/* ===========================
   Archive
   =========================== */
.archive-header {
  padding: 88px 0 64px;
  border-bottom: 1px solid var(--color-gray-mid);
  margin-bottom: 72px;
}

.archive-header__label {
  font-size: 0.6875rem;
  font-weight: var(--font-weight-light);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  color: var(--color-gray-sub);
  margin-bottom: 14px;
}

.archive-header__title {
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  font-weight: var(--font-weight-thin);
  letter-spacing: 0.04em;
}

/* ===========================
   404
   =========================== */
.error-page {
  padding: 88px 0 72px;
  text-align: center;
  border-bottom: 1px solid var(--color-gray-mid);
  margin-bottom: 64px;
}

.error-page__code {
  font-size: 6rem;
  font-weight: var(--font-weight-thin);
  color: #cccccc;
  line-height: 1;
  letter-spacing: -0.02em;
  margin-bottom: 32px;
}

.error-page__title {
  font-size: 1.125rem;
  font-weight: var(--font-weight-light);
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}

.error-page__text {
  font-size: 0.875rem;
  color: var(--color-gray-sub);
  letter-spacing: 0.04em;
  margin-bottom: 48px;
}

/* ゴーストボタン（ネイビーボーダー） */
.btn--ghost {
  background-color: transparent;
  color: var(--color-theme);
  border: 1px solid var(--color-theme);
  border-radius: 0;
}

.btn--ghost:hover {
  background-color: var(--color-theme);
  color: var(--color-white);
  opacity: 1;
}

/* 404 最近の記事 */
.error-recent {
  padding-bottom: 88px;
}

.error-recent__label {
  font-size: 0.6875rem;
  font-weight: var(--font-weight-light);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  color: var(--color-gray-sub);
  margin-bottom: 32px;
  text-align: center;
}

.error-recent__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.error-recent__item {
  display: flex;
  flex-direction: column;
}

.error-recent__thumb {
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background-color: var(--color-gray-light);
  margin-bottom: 16px;
}

.error-recent__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.error-recent__thumb:hover img {
  transform: scale(1.03);
}

.error-recent__no-image {
  width: 100%;
  height: 100%;
  background-color: var(--color-gray-light);
}

.error-recent__title {
  font-size: 0.875rem;
  font-weight: var(--font-weight-light);
  line-height: 1.6;
  letter-spacing: 0.03em;
  margin-bottom: 8px;
}

.error-recent__title a:hover {
  opacity: 0.6;
}

.error-recent__date {
  font-size: 0.6875rem;
  letter-spacing: var(--letter-spacing-wide);
  color: var(--color-gray-sub);
  text-transform: uppercase;
}

@media (max-width: 768px) {
  .error-recent__grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .error-page {
    padding: 64px 0 56px;
    margin-bottom: 48px;
  }

  .error-recent {
    padding-bottom: 56px;
  }
}

.btn {
  display: inline-block;
  padding: 14px 48px;
  background-color: var(--color-black);
  color: var(--color-white);
  font-size: 0.6875rem;
  font-weight: var(--font-weight-light);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  transition: background-color 0.2s, color 0.2s, opacity 0.2s;
}

.btn:hover {
  opacity: 0.7;
  color: var(--color-white);
}

/* ===========================
   Footer
   =========================== */
.site-footer {
  background-color: var(--color-theme);
  color: var(--color-theme-text);
  padding: 40px 0;
}

.site-footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.site-footer__name {
  font-size: 1rem;
  font-weight: var(--font-weight-thin);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: none;
  text-align: center;
  margin-bottom: 8px;
}

.site-footer__copy {
  font-size: 0.6875rem;
  font-weight: var(--font-weight-light);
  opacity: 0.5;
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
}

/* ===========================
   Responsive
   =========================== */
@media (max-width: 1024px) {
  .post-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 48px 32px;
  }
}

@media (max-width: 768px) {
  .slider-section {
    padding: var(--spacing-section-sp) 0;
  }

  .slider__card {
    flex: 0 0 100%;
    padding: 0;
  }

  .site-header__inner {
    height: 52px;
  }

  /* モバイルはヘッダー52px分だけ引き上げ */
  body.home .hero {
    margin-top: -52px;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 52px;
    left: 0;
    right: 0;
    background-color: var(--color-theme);
    padding: 16px 24px 28px;
    border-top: 1px solid rgba(255,255,255,0.08);
  }

  .site-nav.is-open {
    display: block;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
  }

  .site-nav__item {
    width: 100%;
    border-bottom: 1px solid rgba(255,255,255,0.06);
  }

  .site-nav__item a {
    display: block;
    padding: 16px 0;
    font-size: 0.75rem;
  }

  .nav-toggle {
    display: block;
  }

  .post-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .section {
    padding: var(--spacing-section-sp) 0;
  }

  .post-nav {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .post-nav__next {
    text-align: left;
  }

  .error-page__code {
    font-size: 4.5rem;
  }

  .site-footer__inner {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  html { font-size: 15px; }

  .container {
    padding-left: 24px;
    padding-right: 24px;
  }

  .slider-viewport {
    padding: 0 24px;
  }

  .hero {
    height: 60vh;
  }
}

/* ===========================
   Admin Bar オフセット補正
   =========================== */

/* デスクトップ：管理バー高さ 32px */
.admin-bar .site-header {
  top: 32px;
}

/* タブレット〜スマホ（≤782px）：管理バー高さ 46px */
@media screen and (max-width: 782px) {
  .admin-bar .site-header {
    top: 46px;
  }

  /* モバイルナビの開始位置も合わせてずらす（管理バー分を加算） */
  .admin-bar .site-nav {
    top: 98px; /* 管理バー 46px + ヘッダー 52px */
  }
}

/* 超小型画面（≤600px）：WordPress が body の margin-top を 0 にリセットするため補正不要 */
@media screen and (max-width: 600px) {
  .admin-bar .site-header {
    top: 0;
  }

  .admin-bar .site-nav {
    top: 52px;
  }
}


/* ===========================
   パンくずリスト
   =========================== */
.breadcrumb {
  padding-top: 32px;
  margin-bottom: 24px;
}

.breadcrumb__list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0;
  list-style: none;
}

.breadcrumb__item {
  display: flex;
  align-items: center;
  font-size: 0.6875rem;
  font-weight: var(--font-weight-light);
  letter-spacing: 0.06em;
  color: var(--color-gray-sub);
}

/* 区切り文字（2番目以降のアイテムの前に表示） */
.breadcrumb__item + .breadcrumb__item::before {
  content: '/';
  margin: 0 8px;
  color: var(--color-gray-mid);
}

.breadcrumb__link {
  color: var(--color-gray-sub);
  transition: color 0.2s;
}

.breadcrumb__link:hover {
  color: var(--color-black);
}

.breadcrumb__current {
  color: var(--color-gray-sub);
}

/* ===========================
   コンテンツエリア 上下余白
   =========================== */

/* 固定ページ（プロフィール・プライバシーポリシー・お問い合わせ等） */
body.page .main {
  padding-top: 80px;
  padding-bottom: 80px;
}

/* 記事ページ：post-nav とフッターの間 */
body.single .main {
  padding-bottom: 80px;
}

/* アーカイブページ：コンテンツとフッターの間 */
body.archive .main {
  padding-bottom: 80px;
}

@media (max-width: 768px) {
  body.page .main {
    padding-top: 56px;
    padding-bottom: 56px;
  }

  body.single .main,
  body.archive .main {
    padding-bottom: 56px;
  }
}

/* ===========================
   ページヘッダー（固定ページ共通）
   =========================== */
.page-header {
  margin-bottom: 56px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--color-gray-mid);
}

.page-header__label {
  font-size: 0.625rem;
  font-weight: var(--font-weight-light);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  color: var(--color-gray-sub);
  margin-bottom: 12px;
}

.page-header__title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: var(--font-weight-light);
  letter-spacing: var(--letter-spacing-wide);
}


/* ===========================
   お問い合わせフォーム
   =========================== */
.contact-wrap {
  max-width: 640px;
}

/* 完了・エラーメッセージ */
.contact-result {
  padding: 20px 24px;
  margin-bottom: 40px;
  border-left: 2px solid;
}

.contact-result--success {
  border-color: #22c55e;
  background: #f0fdf4;
}

.contact-result--error {
  border-color: #ef4444;
  background: #fef2f2;
}

.contact-result__title {
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
  color: #15803d;
}

.contact-result__text {
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--color-text);
}

.contact-result__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.contact-result__list li {
  font-size: 0.875rem;
  color: #b91c1c;
}

.contact-result__list li::before {
  content: '・';
}

/* フォーム本体 */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.contact-form__row {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.contact-form__label {
  font-size: 0.8125rem;
  font-weight: var(--font-weight-regular);
  letter-spacing: var(--letter-spacing-wide);
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 8px;
}

.contact-form__required {
  font-size: 0.625rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-white);
  background: var(--color-black);
  padding: 2px 6px;
  line-height: 1.6;
}

.contact-form__input,
.contact-form__textarea {
  width: 100%;
  padding: 12px 16px;
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: var(--font-weight-regular);
  color: var(--color-text);
  background: var(--color-white);
  border: 1px solid var(--color-gray-mid);
  border-radius: 0;
  outline: none;
  transition: border-color 0.2s ease;
  appearance: none;
  -webkit-appearance: none;
}

.contact-form__input:focus,
.contact-form__textarea:focus {
  border-color: var(--color-black);
}

.contact-form__textarea {
  resize: vertical;
  line-height: 1.8;
  min-height: 200px;
}

.contact-form__submit {
  padding-top: 8px;
}

.contact-form__btn {
  display: inline-block;
  font-family: inherit;
  font-size: 0.75rem;
  font-weight: var(--font-weight-regular);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  color: var(--color-white);
  background: var(--color-black);
  border: 1px solid var(--color-black);
  padding: 14px 48px;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
  appearance: none;
  -webkit-appearance: none;
}

.contact-form__btn:hover {
  background: var(--color-white);
  color: var(--color-black);
}

@media (max-width: 767px) {
  .contact-form__btn {
    width: 100%;
    text-align: center;
  }
}


/* ===========================
   プロフィールページ
   =========================== */

/* ヒーロー（画像＋名前エリア） */
.profile-hero {
  text-align: center;
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--color-gray-mid);
  margin-bottom: 64px;
}

/* アバター（円形） */
.profile-avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  overflow: hidden;
  margin: 0 auto 28px;
  background-color: var(--color-gray-light);
}

.profile-avatar__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.profile-avatar__placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.profile-avatar__placeholder svg {
  width: 72%;
  height: 72%;
}

/* サイト名 */
.profile-hero__site {
  font-size: 0.6875rem;
  font-weight: var(--font-weight-light);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  color: var(--color-gray-sub);
  margin-bottom: 10px;
}

/* 運営者名 */
.profile-hero__name {
  font-size: clamp(1.375rem, 3vw, 1.875rem);
  font-weight: var(--font-weight-thin);
  letter-spacing: var(--letter-spacing-wide);
}

/* 本文エリア */
.profile-body {
  max-width: 640px;
  margin: 0 auto 64px;
  font-size: 0.9375rem;
  line-height: 2;
  color: #333333;
  font-weight: var(--font-weight-light);
}

.profile-body h2 {
  font-size: 1.0625rem;
  font-weight: var(--font-weight-light);
  border-left: 1px solid var(--color-black);
  padding-left: 16px;
  margin: 3rem 0 1.25rem;
  letter-spacing: 0.04em;
}

.profile-body p {
  margin-bottom: 1.5rem;
}

.profile-body ul {
  margin: 1rem 0 1.5rem 1.5rem;
  list-style: disc;
}

.profile-body li {
  margin-bottom: 0.5rem;
}

/* SNSリンクエリア */
.profile-sns {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  padding-bottom: 88px;
}

.profile-sns__link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--color-gray-sub);
  transition: color 0.2s;
}

.profile-sns__link:hover {
  color: var(--color-black);
}

.profile-sns__icon {
  width: 20px;
  height: 20px;
}

@media (max-width: 768px) {
  .profile-hero {
    padding: 56px 0 40px;
    margin-bottom: 48px;
  }

  .profile-body {
    margin-bottom: 48px;
  }

  .profile-sns {
    padding-bottom: 64px;
  }
}

/* ===========================
   カラーテーマ
   =========================== */

/* ネイビー（デフォルト） */
body.theme-navy {
  --color-theme:      #2c4a7c;
  --color-theme-text: #ffffff;
  --color-bg:         #ffffff;
}

/* エンジ */
body.theme-engee {
  --color-theme:      #9f263d;
  --color-theme-text: #ffffff;
  --color-bg:         #ffffff;
}

/* ベージュ */
body.theme-beige {
  --color-theme:      #bfab90;
  --color-theme-text: #3a2e23;
  --color-bg:         #fdf8f3;
}

/* タフィーピンク */
body.theme-pink {
  --color-theme:      #f987c5;
  --color-theme-text: #ffffff;
  --color-bg:         #fff5fb;
}

/* ダークモード（手動選択） */
body.theme-dark {
  --color-theme:      #1e2235;
  --color-theme-text: #e8eaf0;
  --color-bg:         #121420;
  --color-text:       #d0d4e8;
  --color-gray-light: #1e2235;
  --color-gray-mid:   #2c3050;
}

/* ダークモード（OSのシステム設定に自動対応、手動選択がない場合） */
@media (prefers-color-scheme: dark) {
  body:not(.theme-navy):not(.theme-engee):not(.theme-beige):not(.theme-pink) {
    --color-theme:      #1e2235;
    --color-theme-text: #e8eaf0;
    --color-bg:         #121420;
    --color-text:       #d0d4e8;
    --color-gray-light: #1e2235;
    --color-gray-mid:   #2c3050;
  }
}