*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --color-text: #1c1c1c;
  --color-muted: #77736d;
  --color-line: #e4e1dc;
  --color-bg: #fff;
  --color-bg-sub: #f3f1ed;
  --color-accent: #b0472a;

  --font-sans: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", "YuGothic", Meiryo, sans-serif;
  --font-serif: "Hiragino Mincho ProN", "Yu Mincho", "YuMincho", "Noto Serif JP", serif;
  --font-latin: Georgia, "Times New Roman", serif;
}

/* 内容が短いページでも、フッターが画面の一番下に来るようにする */
body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
}

body > main {
  flex: 1 0 auto;
  width: 100%;
}

.site-header,
.site-footer {
  flex-shrink: 0;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 64px 24px 112px;
}

@media (max-width: 639px) {
  .container {
    padding: 40px 16px 80px;
  }
}

/* ヘッダー・フッター */
/* 中身は main.js が差し込む。差し込む前と後で画面がずれないように高さを固定している */

.site-header {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 104px;
  border-bottom: 1px solid var(--color-line);
}

.site-footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 128px;
  border-top: 1px solid var(--color-line);
}

.site-logo {
  font-family: var(--font-latin);
  font-size: 2rem;
  line-height: 1;
  letter-spacing: 0.04em;
  text-decoration: none;
}

.site-logo em {
  color: var(--color-accent);
}

.site-footer .site-logo {
  font-size: 1.25rem;
}

.site-footer small {
  font-family: var(--font-latin);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--color-muted);
}

@media (max-width: 639px) {
  .site-header {
    height: 76px;
  }

  .site-header .site-logo {
    font-size: 1.5rem;
  }
}

/* 見出し（記事一覧） */

.section-title {
  margin: 0 0 56px;
  text-align: center;
}

.section-title__en {
  display: block;
  font-family: var(--font-latin);
  font-size: 0.8rem;
  font-weight: normal;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.section-title__ja {
  display: block;
  margin-top: 8px;
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 600;
  letter-spacing: 0.12em;
}

/* 記事一覧 */

.post-list {
  display: grid;
  grid-template-columns: 1fr;
  margin: 0;
  padding: 0;
  list-style: none;
}

.post-card a {
  display: block;
  text-decoration: none;
}

.post-card__thumb {
  aspect-ratio: 1 / 1;
  overflow: hidden;
  background: var(--color-bg-sub);
}

.post-card__thumb img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.post-card a:hover .post-card__thumb img {
  transform: scale(1.04);
}

.post-card__body {
  padding-top: 18px;
}

.post-card__date {
  display: block;
  font-family: var(--font-latin);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: var(--color-muted);
}

.post-card__title {
  display: block;
  margin-top: 6px;
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.6;
  letter-spacing: 0.04em;
  transition: color 0.2s;
}

.post-card a:hover .post-card__title {
  color: var(--color-accent);
}

/* 1ページ目の先頭（最新記事）だけ大きく表示する */

.post-card--featured {
  grid-column: 1 / -1;
}

.post-card__label {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-latin);
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.post-card--featured .post-card__title {
  margin-top: 10px;
  font-size: 1.6rem;
  line-height: 1.5;
}

.post-card__more {
  display: inline-block;
  margin-top: 24px;
  padding-bottom: 2px;
  border-bottom: 1px solid currentColor;
  font-family: var(--font-latin);
  font-size: 0.85rem;
  letter-spacing: 0.15em;
}

/* スマホ：最新記事以外は、サムネイルを左に置いた横長の行にする */
@media (max-width: 639px) {
  .post-card {
    padding: 20px 0;
    border-bottom: 1px solid var(--color-line);
  }

  .post-card--featured {
    padding: 0 0 32px;
  }

  .post-card:not(.post-card--featured) a {
    display: grid;
    grid-template-columns: 112px 1fr;
    gap: 16px;
    align-items: center;
  }

  .post-card:not(.post-card--featured) .post-card__body {
    padding-top: 0;
  }

  .post-card:not(.post-card--featured) .post-card__title {
    font-size: 1rem;
  }
}

@media (min-width: 640px) {
  .post-list {
    grid-template-columns: repeat(2, 1fr);
    gap: 48px 32px;
  }

  .post-card--featured {
    padding-bottom: 56px;
    border-bottom: 1px solid var(--color-line);
  }

  .post-card--featured a {
    display: grid;
    grid-template-columns: 1.15fr 1fr;
    gap: 40px;
    align-items: center;
  }

  .post-card--featured .post-card__body {
    padding-top: 0;
  }
}

@media (min-width: 960px) {
  .post-list {
    grid-template-columns: repeat(3, 1fr);
    gap: 64px 40px;
  }

  .post-card--featured a {
    gap: 64px;
  }

  .post-card--featured .post-card__title {
    font-size: 2rem;
  }
}

/* ページネーション */

.pagination {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 6px;
  margin-top: 80px;
  font-family: var(--font-latin);
}

.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 8px;
  border-radius: 999px;
  color: var(--color-text);
  text-decoration: none;
  transition: background 0.2s;
}

.pagination a:hover {
  background: var(--color-bg-sub);
}

.pagination [aria-current="page"] {
  background: var(--color-text);
  color: var(--color-bg);
}

.pagination .pagination__step {
  padding: 0 16px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  letter-spacing: 0.08em;
}

.pagination .pagination__disabled {
  opacity: 0.35;
}

.pagination .pagination__gap {
  min-width: 24px;
  padding: 0;
  color: var(--color-muted);
}

/* 記事 */

.back-link {
  display: table;
  margin: 0 auto 40px;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  color: var(--color-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.back-link:hover {
  color: var(--color-accent);
}

.article {
  max-width: 680px;
  margin: 0 auto;
  font-size: 1.0625rem;
  line-height: 2;
  letter-spacing: 0.03em;
}

/* 記事のタイトル */
.article > .title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 2.25rem;
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: 0.06em;
  text-align: center;
}

.article > .title + time {
  display: block;
  margin-top: 16px;
  font-family: var(--font-latin);
  font-size: 0.85rem;
  letter-spacing: 0.16em;
  text-align: center;
  color: var(--color-muted);
}

.article > .title + time::after {
  content: "";
  display: block;
  width: 40px;
  height: 1px;
  margin: 40px auto 8px;
  background: var(--color-accent);
}

/* 大見出し */
.article h1 {
  margin: 64px 0 20px;
  font-family: var(--font-serif);
  font-size: 1.45rem;
  font-weight: 600;
  line-height: 1.6;
  letter-spacing: 0.06em;
}

.article h1::before {
  content: "";
  display: block;
  width: 24px;
  height: 2px;
  margin-bottom: 16px;
  background: var(--color-accent);
}

/* 小見出し */
.article h2 {
  margin: 48px 0 16px;
  padding-left: 14px;
  border-left: 2px solid var(--color-accent);
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: 0.04em;
}

.article h1 + h2 {
  margin-top: 28px;
}

.article p {
  margin: 0 0 1.6em;
}

.article img {
  display: block;
  margin: 40px auto;
}

.article a {
  color: var(--color-accent);
}

/* 1枚だけの写真は、縦長でも画面からはみ出しすぎないように高さを抑える */
.article > img {
  width: auto;
  max-height: 640px;
}

/* 写真ギャラリー：続けて並ぶ写真を2列で表示する。写真を押すと元の写真が開く */
.article .gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin: 32px 0;
}

.article .gallery a {
  display: block;
  overflow: hidden;
  background: var(--color-bg-sub);
}

.article .gallery img {
  width: 100%;
  aspect-ratio: 1 / 1;
  margin: 0;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.article .gallery a:hover img {
  transform: scale(1.04);
}

/* 枚数が奇数のときは、最後の1枚を横いっぱいに表示する */
.article .gallery > :last-child:nth-child(odd) {
  grid-column: 1 / -1;
}

.article .gallery > :last-child:nth-child(odd) img {
  aspect-ratio: 3 / 2;
}

@media (max-width: 639px) {
  .article {
    font-size: 1rem;
  }

  .article > .title {
    font-size: 1.6rem;
  }

  .article h1 {
    margin-top: 48px;
    font-size: 1.25rem;
  }

  .article h2 {
    margin-top: 40px;
    font-size: 1.1rem;
  }
}

/* 前後の記事 */

.post-nav {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  max-width: 680px;
  margin: 96px auto 0;
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.post-nav:empty {
  display: none;
}

.post-nav::after {
  content: "";
  position: absolute;
  top: 24px;
  bottom: 24px;
  left: 50%;
  width: 1px;
  background: var(--color-line);
}

.post-nav a {
  display: block;
  padding: 28px 0;
  text-decoration: none;
}

.post-nav .post-nav__prev {
  grid-column: 1;
  padding-right: 24px;
}

.post-nav .post-nav__next {
  grid-column: 2;
  padding-left: 24px;
  text-align: right;
}

.post-nav__label {
  display: block;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: var(--color-muted);
}

.post-nav__title {
  display: block;
  margin-top: 6px;
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.6;
  transition: color 0.2s;
}

.post-nav a:hover .post-nav__title {
  color: var(--color-accent);
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
  }
}