/*
  ブログ一覧（/blog-index）だけが読む見た目（2026-10-13・Tom が A 雑誌型と C 分類の棚型の掛け合わせに決めた）。
  中身は scripts/lp/blog-index-build.py が書く。共有の css/staygo-os.css の後に読む。

  ⚠️ 大域の `a { 青 !important }`・`h1..h5 { 字の色 !important }`・`p, li { 弱い字 }` に負けるので、
     カードの中の字は名指しで !important を付ける。
  ⚠️ 字は写真の上に載せない（明るい写真で読めなくなる。AI の記事のスマホ画面で起きた）。写真の下に置く。
  ⚠️ 左の帯を置かない。押しどころは 44px 以上。スマホは左右16px で横にはみ出さない。
  角丸は 写真 20px / 押しどころ 999px（CLAUDE.md の決め）。
*/
.bi { --g: 40px; max-width: 1200px; margin: 0 auto; padding: 128px var(--g) 112px; color: var(--os-ink); overflow-x: clip; }
.bi a { text-decoration: none !important; }
.bi ul { list-style: none; margin: 0; padding: 0; }
.bi li::before { content: none !important; }
.bi picture { display: block; width: 100%; height: 100%; }
.bi img { display: block; width: 100%; height: 100%; object-fit: cover; transition: transform 900ms var(--os-ease); }

/* 見出し（前の「JAPAN TRAVEL INSIGHTS」72px から控えめに） */
.bi-hero { max-width: 720px; margin: 0 0 40px; }
.bi .bi-eyebrow { margin: 0 0 14px !important; font-size: 12px; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; color: var(--os-accent) !important; }
.bi .bi-h1 { margin: 0 !important; font-size: clamp(30px, 3.1vw, 44px) !important; line-height: 1.12 !important; font-weight: 700 !important; }
.bi .bi-sub { margin: 14px 0 0 !important; font-size: 17px; line-height: 1.6; color: var(--os-ink-muted) !important; max-width: 52ch; }

/* 札・読了時間（カードの中） */
.bi .card-tag { display: block; padding: 0; background: none; border-radius: 0; font-size: 12px; font-weight: 600; line-height: 1.4; letter-spacing: 0.08em; text-transform: uppercase; color: var(--os-accent) !important; }
.bi .card-read { display: block; font-size: 13px; line-height: 1.4; color: var(--os-ink-subtle) !important; }
.bi-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.bi-dot { width: 3px; height: 3px; border-radius: 50%; background: var(--os-border-strong); }
/* 和文の題が「プランナ／ー」と長音で行頭から始まらないように。auto-phrase は Chromium だけ効く */
:lang(ja) .bi .card-title, :lang(ja) .bi .bi-h1 { line-break: strict; word-break: auto-phrase; }
:lang(ja) .bi .card-tag, :lang(zh) .bi .card-tag, :lang(zh-Hant) .bi .card-tag, :lang(ko) .bi .card-tag { letter-spacing: 0.04em; }

/* いちばん新しい1本 */
.bi-lead { margin: 0 0 48px; }
.bi-lead-link { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr); gap: 48px; align-items: center; color: inherit !important; }
.bi-lead-photo { display: block; aspect-ratio: 3 / 2; border-radius: 20px; overflow: hidden; background: var(--os-bg-soft); }
.bi-lead-body { display: flex; flex-direction: column; align-items: flex-start; gap: 14px; }
.bi .bi-lead .card-title { margin: 0 !important; font-size: clamp(26px, 2.6vw, 36px) !important; line-height: 1.18 !important; font-weight: 700 !important; }
.bi .bi-lead .card-desc { margin: 0 !important; font-size: 16px; line-height: 1.65; color: var(--os-ink-muted) !important; }
.bi-more { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; font-size: 14px; font-weight: 600; color: var(--os-ink); }
.bi-more svg { transition: transform var(--os-motion) var(--os-ease); }

/* 分類の札。押すと下の棚へ移る（絞り込みはしない） */
.bi-chips { margin: 0 0 56px; padding-top: 32px; border-top: 1px solid var(--os-border); }
.bi-chips-row { display: flex; gap: 8px; flex-wrap: wrap; }
.bi .bi-chip {
  display: inline-flex; align-items: center; gap: 8px; min-height: 44px; padding: 0 18px;
  border: 1px solid var(--os-surface-ink); border-radius: 999px; background: var(--os-surface-ink);
  font-size: 14px; font-weight: 500; line-height: 1; white-space: nowrap; color: #fff !important;
  transition: color var(--os-motion) var(--os-ease), background var(--os-motion) var(--os-ease);
}
.bi-chip-n { color: rgba(255,255,255,.7); font-size: 12px; transition: color var(--os-motion) var(--os-ease); }
/* 黒いピルが地、触ると白に返る（Tom 10/13）。キーボードで来た時も同じ見え方に */
.bi .bi-chip:hover, .bi .bi-chip:focus-visible { background: var(--os-bg); color: var(--os-surface-ink) !important; }
.bi .bi-chip:hover .bi-chip-n, .bi .bi-chip:focus-visible .bi-chip-n { color: var(--os-ink-subtle); }

/* 棚 */
.bi-shelf { margin: 0 0 64px; scroll-margin-top: 104px; }
.bi-shelf-head { display: flex; align-items: center; gap: 16px; margin: 0 0 20px; min-height: 44px; }
.bi .bi-shelf-title { margin: 0 !important; font-size: 24px !important; line-height: 1.2 !important; font-weight: 700 !important; }
.bi-shelf-tools { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.bi-all {
  display: inline-flex; align-items: center; gap: 6px; min-height: 44px; padding: 0 16px 0 18px;
  border: 1px solid var(--os-border-strong); border-radius: 999px; background: var(--os-bg); color: var(--os-ink);
  font: 500 14px/1 var(--os-font); white-space: nowrap; cursor: pointer;
}
.bi-all:hover { background: var(--os-bg-soft); }
.bi-all-n { color: var(--os-ink-subtle); }
.bi-all-close { display: none; }
.bi-all[aria-expanded="true"] .bi-all-open { display: none; }
.bi-all[aria-expanded="true"] .bi-all-close { display: inline; }
.bi-all[aria-expanded="true"] .bi-all-n { display: none; }
.bi-chev { transition: transform var(--os-motion) var(--os-ease); }
.bi-all[aria-expanded="true"] .bi-chev { transform: rotate(180deg); }
.bi-arrow {
  width: 44px; height: 44px; padding: 0; display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--os-border-strong); border-radius: 999px; background: var(--os-bg); color: var(--os-ink); cursor: pointer;
  transition: opacity var(--os-motion) var(--os-ease);
}
.bi-arrow:hover { background: var(--os-bg-soft); }
.bi-arrow:disabled { opacity: 0.3; cursor: default; }
.bi-shelf.is-open .bi-arrow { display: none; }

.bi-rail {
  display: flex; gap: 24px; overflow-x: auto; overscroll-behavior-x: contain;
  scroll-snap-type: x mandatory; scroll-behavior: smooth; scrollbar-width: none;
}
.bi-rail::-webkit-scrollbar { display: none; }
/* 広い画面は3枚半。4枚目が覗くので、横に送れると分かる */
.bi-post { flex: 0 0 calc((100% - 3 * 24px) / 3.4); scroll-snap-align: start; min-width: 0; }
.bi-post-link { display: flex; flex-direction: column; gap: 10px; color: inherit !important; }
.bi-photo { display: block; aspect-ratio: 3 / 2; border-radius: 20px; overflow: hidden; background: var(--os-bg-soft); margin-bottom: 6px; }
.bi .bi-post .card-title { margin: 0 !important; font-size: 19px !important; line-height: 1.32 !important; font-weight: 600 !important; }
.bi .bi-post .card-desc { display: none; }

/* 「すべて見る」で開いた棚は3列（A の格子と同じ） */
.bi-shelf.is-open .bi-rail { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 48px 32px; overflow: visible; scroll-snap-type: none; }
.bi-shelf.is-open .bi-post { flex: none; max-width: none; }
.bi .bi-shelf.is-open .bi-post .card-desc {
  display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 2; line-clamp: 2; overflow: hidden;
  margin: 0 !important; font-size: 14px; line-height: 1.6; color: var(--os-ink-muted) !important;
}

@media (hover: hover) {
  .bi-lead-link:hover img, .bi-post-link:hover img { transform: scale(1.04); }
  .bi .bi-lead-link:hover .card-title, .bi .bi-post-link:hover .card-title { color: var(--os-accent-ink) !important; }
  .bi-lead-link:hover .bi-more svg { transform: translateX(4px); }
}

@media (max-width: 1023px) {
  .bi-post { flex-basis: calc((100% - 24px) / 2.3); }
  .bi-shelf.is-open .bi-rail { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 899px) {
  .bi-lead-link { grid-template-columns: minmax(0, 1fr); gap: 20px; }
}
@media (max-width: 599px) {
  .bi { --g: 16px; padding-top: 104px; padding-bottom: 72px; }
  .bi-hero { margin-bottom: 28px; }
  .bi .bi-sub { font-size: 16px; }
  .bi-lead { margin-bottom: 36px; }
  /* 札は1行で横に滑らせる（折り返すと4段になり、棚が画面の下へ押し出される） */
  .bi-chips { margin: 0 calc(-1 * var(--g)) 44px; padding-top: 24px; }
  .bi-chips-row { flex-wrap: nowrap; overflow-x: auto; padding: 0 var(--g); scrollbar-width: none; }
  .bi-chips-row::-webkit-scrollbar { display: none; }
  .bi .bi-chip { flex: 0 0 auto; }
  .bi-shelf { margin-bottom: 48px; scroll-margin-top: 88px; }
  .bi .bi-shelf-title { font-size: 20px !important; }
  .bi-shelf-tools .bi-arrow { display: none; }
  .bi-all { padding: 0 12px 0 14px; font-size: 13px; }
  /* 棚は画面の端まで伸ばし、次の1枚を覗かせる。指で横に送る */
  .bi-rail { margin: 0 calc(-1 * var(--g)); padding: 0 var(--g); scroll-padding-inline: var(--g); gap: 14px; }
  .bi-post { flex-basis: 74vw; max-width: 320px; }
  .bi .bi-post .card-title { font-size: 17px !important; }
  .bi-shelf.is-open .bi-rail { grid-template-columns: minmax(0, 1fr); gap: 36px; margin: 0; padding: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .bi-rail { scroll-behavior: auto; }
  .bi img, .bi-more svg, .bi-chev { transition: none !important; }
}