/* 遊び方ページ /howto/（案A 図鑑：左の目次＋カード格子）。共通の言葉は /styles.css（トークン・rail・facts・footer）を使う。 */
.howto main, .howto .footer { margin-left: var(--rail); }
.howto__head { padding-block: clamp(56px, 8vw, 112px) 28px; border-bottom: 1px solid var(--line); }
.howto__head h1 { margin: 0; font-size: clamp(2.4rem, 5vw, 4.4rem); line-height: 1.1; letter-spacing: -.04em; }
.howto__lead { max-width: 34em; margin: 18px 0 0; color: var(--muted); }
.howto__back { margin: 18px 0 0; color: var(--muted); font-size: .86rem; }
.wip-note { max-width: 34em; margin: 18px 0 0; padding: 10px 14px; border: 1px solid var(--line-strong); border-left: 3px solid var(--rust); border-radius: 4px; background: var(--panel); color: var(--muted); font-size: .9rem; }
.wip-note strong { color: var(--text); }
code { padding: 0 .3em; border: 1px solid var(--line); border-radius: 4px; font-family: ui-monospace, "Cascadia Mono", monospace; font-size: .9em; }

/* タグ（見出しの横・押すとリンクをコピー） */
.tag { display: inline-block; vertical-align: middle; margin-left: .35em; padding: 1px 7px; border: 1px solid var(--line); border-radius: 4px; color: var(--olive); font-family: ui-monospace, "Cascadia Mono", monospace; font-size: .72rem; font-weight: 400; letter-spacing: .04em; text-decoration: none; }
.tag:hover, .tag:focus-visible { color: var(--text); border-color: var(--rust); }
.tag--cat { font-size: .78rem; }
.tag--demo { margin: 0; }
.alias { position: absolute; }

/* 左の目次（rail の型） */
.toc { position: fixed; inset: 0 auto 0 0; z-index: 30; width: var(--rail); padding: 32px 24px; border-right: 1px solid var(--line); background: rgba(11, 13, 14, .96); display: flex; flex-direction: column; overflow-y: auto; }
.toc .rail__brand img { width: 164px; height: auto; }
.toc__list { list-style: none; margin: 40px 0 0; padding: 0; display: grid; gap: 2px; counter-reset: rail; }
.toc__list li { counter-increment: rail; }
.toc__list a { display: block; padding: 6px 0; color: var(--muted); text-decoration: none; border-bottom: 1px solid transparent; font-size: .8rem; letter-spacing: .04em; }
.toc__list a::before { content: counter(rail, decimal-leading-zero) " "; margin-right: 8px; color: var(--line-strong); font-family: ui-monospace, monospace; }
.toc__list a:hover, .toc__list a[aria-current="true"] { color: var(--text); border-color: var(--rust); }

/* 大分類 */
.cat { padding-block: clamp(56px, 7vw, 96px) 24px; scroll-margin-top: 24px; }
.cat + .cat { border-top: 1px solid var(--line); }
.cat h2 { margin: 0; font-size: clamp(1.7rem, 3vw, 2.6rem); line-height: 1.16; letter-spacing: -.03em; }
.cat__lead { max-width: 34em; margin: 14px 0 0; color: var(--muted); }
.cat__items { list-style: none; margin: 16px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px 4px; }
.cat__items a { display: inline-block; padding: 4px 10px; border: 1px solid var(--line); border-radius: 4px; color: var(--muted); text-decoration: none; font-size: .8rem; }
.cat__items a:hover { color: var(--text); border-color: var(--line-strong); }

/* 項目＝カード（DOM は 見出し→解放→画→本文。画は CSS で上に出す） */
.items { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin-top: 28px; }
.item { display: flex; flex-direction: column; padding: 20px 22px 24px; border: 1px solid var(--line); border-radius: 4px; background: var(--panel); scroll-margin-top: 24px; }
.item:has(.clip--multi), .item--wide { grid-column: 1 / -1; }
.item h3 { margin: 0; font-size: 1.2rem; line-height: 1.35; }
.item .clip { order: -1; margin: 0 -22px 16px; }
.unlock { margin: 6px 0 0; color: var(--olive); font-size: .8rem; letter-spacing: .04em; }
.unlock span { margin-right: .6em; padding: 0 6px; border: 1px solid var(--olive); border-radius: 4px; font-family: ui-monospace, monospace; font-size: .68rem; }
.item__body { max-width: 34em; margin: 10px 0 0; color: var(--muted); }
.item__body + .item__body { margin-top: 8px; }
.item__body--pending { color: var(--line-strong); }
.item__note { max-width: 34em; margin: 10px 0 0; color: var(--olive); font-size: .84rem; }
.item__rows { margin: 14px 0 0; }
.item__rows div { padding: 12px 14px; }
.item__rows dd { font-weight: 400; color: var(--text); }
.clip__frame { position: relative; aspect-ratio: 16 / 9; overflow: hidden; border-width: 0 0 1px; border-style: solid; border-color: var(--line); background: #050607; }
.clip__frame video, .clip__frame img { width: 100%; height: 100%; object-fit: cover; }
.clip__frame--still img { object-fit: contain; }
.wip { position: absolute; right: 8px; bottom: 8px; padding: 2px 7px; border: 1px solid rgba(232, 230, 226, .35); border-radius: 4px; background: rgba(8, 10, 11, .72); color: rgba(232, 230, 226, .8); font-size: .66rem; letter-spacing: .06em; }
.cap { position: absolute; left: 8px; top: 8px; padding: 2px 8px; border: 1px solid rgba(232, 230, 226, .45); border-radius: 4px; background: rgba(8, 10, 11, .8); color: #f3f0ea; font-size: .78rem; font-weight: 700; }
.clip--multi { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px; padding: 0 22px; }
.clip--multi .clip__frame { border-width: 1px; border-radius: 4px; }
.clip--n3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.clip--n4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.clip--n5 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

/* コピーの合図 */
.toast { position: fixed; z-index: 60; left: 50%; bottom: 84px; transform: translate(-50%, 16px); padding: 9px 16px; border: 1px solid var(--line-strong); border-radius: 4px; background: var(--panel); color: var(--text); font-size: .86rem; opacity: 0; pointer-events: none; transition: opacity .18s, transform .18s; }
.toast.is-on { opacity: 1; transform: translate(-50%, 0); }
.toc-fab, .toc-sheet { display: none; }

@media (max-width: 1050px) {
  .toc { display: none; }
  .howto main, .howto .footer { margin-left: 0; }
  .toc-fab { display: block; position: fixed; z-index: 40; right: 16px; bottom: 16px; min-height: 44px; padding: 0 18px; border: 1px solid var(--rust); border-radius: 4px; background: var(--rust-dark); color: var(--text); font-weight: 700; font-size: .9rem; }
  .toc-sheet { position: fixed; z-index: 50; inset: 0; padding: 16px 16px 32px; background: rgba(11, 13, 14, .98); overflow-y: auto; }
  .toc-sheet:not([hidden]) { display: block; }
  .toc-sheet__head { display: flex; justify-content: space-between; align-items: center; font-weight: 700; }
  .toc-sheet__close { min-height: 44px; padding: 0 14px; border: 1px solid var(--line-strong); border-radius: 4px; background: transparent; color: var(--text); }
  .toc-sheet .toc__list { margin: 12px 0 0; grid-template-columns: 1fr 1fr; gap: 6px; }
  .toc-sheet .toc__list a { min-height: 44px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 4px; color: var(--text); font-size: .86rem; }
  .toc-sheet .toc__list a::before { margin-right: 6px; color: var(--olive); font-size: .72rem; }
  .toc-sheet__foot { margin: 18px 0 0; color: var(--muted); }
  .clip--n4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 700px) {
  .cat { padding-top: 48px; }
  .items { grid-template-columns: 1fr; gap: 14px; }
  .item { padding: 16px 16px 20px; }
  .item .clip { margin: 0 -16px 14px; }
  .clip--multi { padding: 0 16px; }
  .clip--n3, .clip--n5 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .toast { bottom: 72px; max-width: calc(100% - 32px); }
}