/* OSSの生活史 公式サイト
   白と黒だけ。補助に中立の灰色。画面の本文はゴシック、明朝は見出し・目次・語りの引用、読むページの本文だけ。
   影・グラデーション・ぼかしは使わない。 */
@font-face { font-family: "Seikatsushi Serif"; src: url("../fonts/serif-400.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Seikatsushi Serif"; src: url("../fonts/serif-700.woff2") format("woff2"); font-weight: 700; font-display: swap; }
@font-face { font-family: "Seikatsushi Sans";  src: url("../fonts/sans-400.woff2")  format("woff2"); font-weight: 400; font-display: swap; }

:root {
  --ink: #111; --paper: #fff; --paper-2: #fff;
  --sumi: #111; --sumi-2: #555; --sumi-3: #767676;
  --ai: #111; --shu: #111;
  --rule: #ccc; --grid: #d6d6d6;
  --serif: "Seikatsushi Serif", "Hiragino Mincho ProN", "Yu Mincho", "Noto Serif JP", serif;
  --sans: "Seikatsushi Sans", "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
    --gutter: clamp(1.1rem, 4vw, 3.5rem);
  --wide: 70rem;
  --ease: cubic-bezier(.2, .7, .2, 1);
  --head-h: 4rem; --side-w: 200px;
}
@media (min-width: 1100px) { :root { --head-h: 0rem; } body { padding-left: var(--side-w); } }
* { box-sizing: border-box; }
html { font-size: 17px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (max-width: 760px) { html { font-size: 16px; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; } }
body { margin: 0; background: var(--paper); color: var(--sumi); font-family: var(--sans); line-height: 1.9; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
em { font-style: normal; }
.skip { position: absolute; left: -999px; top: 0; background: #111; color: #fff; padding: .5rem 1rem; z-index: 100; }
.skip:focus { left: 0; }
.tcy { text-combine-upright: all; }
:focus-visible { outline: 2px solid #111; outline-offset: 2px; }

/* ───────── ヘッダー（狭い幅は上部バー、1100px 以上は左の固定列） ───────── */
.site-head { position: fixed; inset: 0 0 auto 0; z-index: 60; height: var(--head-h); display: flex; align-items: center; justify-content: space-between; padding: 0 var(--gutter); background: #fff; border-bottom: 1px solid #111; }
.brand { display: flex; align-items: baseline; gap: .6rem; font-family: var(--serif); }
.brand__name { font-weight: 700; font-size: 1.2rem; letter-spacing: .06em; }
.brand__sub { font-size: .8rem; letter-spacing: .25em; color: var(--sumi-2); }
.menu-btn { position: relative; width: 3.4rem; height: 3.4rem; background: none; border: 0; cursor: pointer; color: inherit; padding: 0; }
.menu-btn span { position: absolute; left: .75rem; right: .75rem; height: 2px; background: currentColor; transition: transform .3s var(--ease), opacity .2s; }
.menu-btn span:nth-child(1) { top: 1rem; } .menu-btn span:nth-child(2) { top: 1.5rem; } .menu-btn span:nth-child(3) { top: 2rem; }
.menu-btn em { position: absolute; left: 0; right: 0; bottom: .15rem; font-size: .6rem; line-height: 1; letter-spacing: .1em; text-align: center; }
body.menu-open .menu-btn span:nth-child(1) { transform: translateY(.5rem) rotate(45deg); }
body.menu-open .menu-btn span:nth-child(2) { opacity: 0; }
body.menu-open .menu-btn span:nth-child(3) { transform: translateY(-.5rem) rotate(-45deg); }
.site-nav { position: fixed; inset: 0; z-index: 55; background: #fff; display: grid; place-items: center; opacity: 0; visibility: hidden; transition: opacity .25s var(--ease), visibility 0s .25s; }
body.menu-open .site-nav { opacity: 1; visibility: visible; transition-delay: 0s; }
.site-nav ol { list-style: none; margin: 0; padding: 0; display: grid; gap: .3rem; text-align: center; font-family: var(--serif); }
.site-nav li a { display: block; padding: .7rem 2rem; font-size: 1.3rem; letter-spacing: .2em; color: #111; }
.site-nav__foot { position: absolute; bottom: 1.5rem; left: 0; right: 0; text-align: center; font-size: .8rem; letter-spacing: .1em; color: var(--sumi-3); }
@media (max-width: 1099px) { body.menu-open { overflow: hidden; } }
@media (min-width: 1100px) {
  .menu-btn { display: none; }
  .site-head { inset: 0 auto 0 0; width: var(--side-w); height: auto; flex-direction: column; justify-content: flex-start; align-items: stretch; gap: 2.2rem; padding: 2.4rem 0 1.5rem; border-bottom: 0; border-right: 1px solid #111; overflow-y: auto; }
  .brand { flex-direction: row-reverse; justify-content: center; align-items: flex-start; gap: .5rem; }
  .brand__name { writing-mode: vertical-rl; text-orientation: upright; font-size: 1.85rem; line-height: 1; letter-spacing: .12em; }
  .brand__sub { writing-mode: vertical-rl; text-orientation: upright; letter-spacing: .3em; padding-top: .3rem; }
  .site-nav { position: static; inset: auto; background: none; display: block; opacity: 1; visibility: visible; transition: none; }
  .site-nav ol { display: block; text-align: left; border-top: 1px solid #111; }
  .site-nav li a { padding: .8rem 1.2rem .8rem 1.6rem; font-size: .95rem; letter-spacing: .16em; border-bottom: 1px solid var(--rule); }
  .site-nav li a:hover { background: #111; color: #fff; }
  .site-nav__foot { display: none; }
}

/* ───────── KV（白地。語りの列は薄い灰で静止） ───────── */
.kv { position: relative; min-height: 100svh; overflow: hidden; background: #fff; color: #111; isolation: isolate; }
.kv__field { position: absolute; inset: 0 -2%; display: flex; justify-content: space-between; gap: 1rem; pointer-events: none; }
.kv__col { writing-mode: vertical-rl; text-orientation: mixed; font-family: var(--serif); font-size: clamp(.8rem, 1.05vw, 1rem); line-height: 2.1; letter-spacing: .06em; color: var(--grid); white-space: nowrap; overflow: hidden; max-height: 100%; }
.kv__col span::after { content: "　　"; }
.kv__col:nth-child(even) { padding-top: 3.2em; }
.kv__inner { position: relative; z-index: 2; min-height: 100svh; display: grid; grid-template-columns: 1fr auto; grid-template-rows: 1fr auto; padding: clamp(5.5rem, 14vh, 8rem) var(--gutter) clamp(4rem, 10vh, 6rem); max-width: var(--wide); margin: 0 auto; }
.kv__title { grid-column: 2; grid-row: 1; margin: 0; align-self: start; display: flex; gap: .9rem; }
.kv__plate { writing-mode: vertical-rl; text-orientation: upright; background: #fff; color: #111; font-family: var(--serif); font-weight: 700; font-size: clamp(2.3rem, 7.2vh, 4.4rem); line-height: 1; letter-spacing: .14em; padding: 1.4em .3em 1.6em; border: 1px solid #111; }
.kv__vol { writing-mode: vertical-rl; font-family: var(--serif); font-size: 1rem; letter-spacing: .5em; color: var(--sumi-2); padding-top: .4rem; }
.kv__pv { grid-column: 1; grid-row: 1; justify-self: end; align-self: start; margin: 0 3rem 0 0; display: flex; flex-direction: column; gap: .9rem; align-items: flex-start; writing-mode: vertical-rl; background: #fff; border: 1px solid #111; padding: 1.2rem .9rem; max-height: min(70vh, 34rem); }
.kv__quote { margin: 0; font-family: var(--serif); font-size: clamp(1.25rem, 2.2vw, 1.7rem); font-weight: 700; line-height: 1.7; letter-spacing: .08em; }
.kv__pv:hover .kv__q, .kv__pv:focus-visible .kv__q { text-decoration: underline; text-underline-offset: .2em; }
.kv__cred { margin: 0; font-family: var(--serif); font-size: .85rem; line-height: 1.9; letter-spacing: .14em; color: var(--sumi-2); align-self: flex-end; }
.kv__stats { grid-column: 1 / -1; grid-row: 2; align-self: end; justify-self: end; list-style: none; margin: 0; padding: 0; display: flex; gap: 1.8rem; }
.kv__stats li { display: grid; text-align: right; }
.kv__stats b { font: 700 clamp(1.4rem, 3vw, 2.1rem)/1.1 var(--serif); color: #111; }
.kv__stats span { font-family: var(--serif); font-size: .8rem; letter-spacing: .12em; color: var(--sumi-2); }
.kv__scroll { position: absolute; left: 50%; bottom: 1.2rem; transform: translateX(-50%); z-index: 3; display: grid; justify-items: center; gap: .4rem; font-family: var(--serif); font-size: .72rem; letter-spacing: .2em; color: #111; }
.kv__scroll i { width: 1px; height: 2.4rem; background: #111; }
@media (max-width: 760px) {
  .kv__inner { grid-template-columns: 1fr; grid-template-rows: auto auto; padding-top: 5.5rem; gap: 1.5rem; }
  .kv__title { grid-column: 1; grid-row: 1; justify-self: end; }
  .kv__plate { font-size: 2.2rem; padding: 1em .3em 1.2em; }
  .kv__pv { grid-column: 1; grid-row: 1; justify-self: start; margin: 0; max-height: 26rem; }
  .kv__stats { grid-column: 1; grid-row: 2; justify-self: start; gap: 1.2rem; }
  .kv__stats li { text-align: left; }
  .kv__scroll { display: none; }
}

/* ───────── 節 ───────── */
.sec { padding: clamp(3.5rem, 9vh, 6.5rem) var(--gutter); }
.sec, .goju-group { scroll-margin-top: calc(var(--head-h) + 1rem); }
.sec > * { max-width: var(--wide); margin-inline: auto; }
.sec + .sec { padding-top: 0; }
.sec__head { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 1rem 1.5rem; margin-bottom: clamp(1.4rem, 4vh, 2.4rem); border-bottom: 1px solid var(--sumi); padding-bottom: .8rem; }
.sec__head h2 { margin: 0; font-family: var(--serif); font-size: clamp(1.5rem, 3vw, 1.9rem); font-weight: 700; letter-spacing: .06em; line-height: 1.3; }
.more { font-size: .9rem; color: var(--sumi-2); white-space: nowrap; border-bottom: 1px solid currentColor; padding-bottom: .1rem; }
.more::after { content: " →"; }
.more:hover { background: #111; color: #fff; }
.sec__intro { font-size: 1rem; color: var(--sumi-2); margin: 0 auto 1.8rem; max-width: 42em; }
.sec__note { font-size: .92rem; color: var(--sumi-2); margin: 1.6rem auto 0; }

.reveal { opacity: 0; transform: translateY(10px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }

/* ───────── おしらせ ───────── */
.news { list-style: none; margin-block: 0; padding: 0; }
.news__item { display: grid; grid-template-columns: 7.5rem 4.5rem 1fr; gap: 1rem; align-items: baseline; padding: 1rem 0; border-bottom: 1px solid var(--rule); }
.news__item time { justify-self: start; font: 700 .82rem/1 var(--serif); letter-spacing: .08em; background: #111; color: #fff; padding: .4rem .55rem; }
.news__tag { font-size: .72rem; letter-spacing: .12em; color: #111; border: 1px solid #111; padding: .15rem .4rem; text-align: center; line-height: 1.4; }
.news__item p { margin: 0; font-size: 1.05rem; }
.news__item.is-new p::after { content: "NEW"; margin-left: .6rem; font: 700 .62rem/1 var(--serif); letter-spacing: .15em; color: #111; vertical-align: .2em; }
@media (max-width: 600px) { .news__item { grid-template-columns: auto 1fr; gap: .5rem 1rem; } .news__tag { justify-self: start; } .news__item p { grid-column: 1 / -1; } }

/* ───────── この企画 ───────── */
.about { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: clamp(2rem, 6vw, 5rem); }
.about__what { grid-column: 1 / -1; margin: 0; font-size: 1.1rem; padding-left: 1rem; border-left: 3px solid #111; word-break: keep-all; overflow-wrap: anywhere; }
.about__big { grid-column: 1 / -1; margin: 0; font-family: var(--serif); font-size: clamp(1.35rem, 2.8vw, 1.9rem); font-weight: 700; line-height: 1.85; letter-spacing: .03em; max-width: 30em; }
.about__text p { margin: 0 0 1.3em; font-size: 1.05rem; text-indent: 1em; }
.about__sign { text-indent: 0 !important; text-align: right; font-size: .95rem; letter-spacing: .1em; color: var(--sumi-2); }
.method { list-style: none; margin: 0; padding: 0; counter-reset: m; align-self: start; border-top: 1px solid var(--sumi); }
.method li { counter-increment: m; display: grid; grid-template-columns: 2.2rem 6.4rem 1fr; gap: .8rem; align-items: baseline; padding: 1rem 0; border-bottom: 1px solid var(--rule); }
.method li::before { content: counter(m, cjk-ideographic); font-family: var(--serif); color: #111; }
.method b { font-weight: 700; letter-spacing: .06em; }
.method span { font-size: .98rem; color: var(--sumi-2); line-height: 1.8; }
@media (max-width: 820px) { .about { grid-template-columns: 1fr; } }
@media (max-width: 760px) { .about__what { word-break: normal; overflow-wrap: normal; line-break: strict; } }
@media (max-width: 600px) {
  .method li { grid-template-columns: 2.2rem 1fr; gap: .2rem .8rem; }
  .method li::before { grid-row: 1 / 3; }
}

/* ───────── 各篇 ───────── */
.filter { display: flex; gap: .3rem; }
.filter button { white-space: nowrap; font-family: var(--sans); font-size: .85rem; letter-spacing: .06em; color: #111; background: #fff; border: 1px solid #111; padding: .4rem .9rem; cursor: pointer; }
.filter button small { margin-left: .3rem; }
.filter button.is-on { color: #fff; background: #111; border-color: #111; }
.eps { list-style: none; margin-block: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(17rem, 1fr)); gap: 1rem; }
.ep.is-hidden { display: none; }
.ep__link { display: grid; grid-template-rows: auto 1fr auto auto; gap: .5rem; min-height: 14rem; padding: 1.3rem 1.3rem 1.1rem; position: relative; background: #fff; border: 1px solid #111; transition: background .2s, color .2s; }
.ep--pub .ep__link:hover { background: #111; color: #fff; }
.ep--pub .ep__link:hover .ep__no, .ep--pub .ep__link:hover .ep__meta, .ep--pub .ep__link:hover .ep__go { color: #fff; }
.ep__no { font-size: .8rem; letter-spacing: .14em; color: var(--sumi-3); }
.ep__lead { font-family: var(--serif); font-size: 1.15rem; font-weight: 700; line-height: 1.7; letter-spacing: .02em; text-indent: -.5em; }
.ep__lead--wait { font-family: var(--sans); font-weight: 400; font-size: .95rem; color: var(--sumi-3); text-indent: 0; }
.ep__who { font-size: .95rem; letter-spacing: .06em; }
.ep__meta { font: 400 .8rem/1 var(--serif); color: var(--sumi-3); }
.ep__go { position: absolute; right: 1.2rem; bottom: 1rem; font-size: .85rem; letter-spacing: .12em; color: #111; }
.ep__go::after { content: " →"; display: inline-block; transition: transform .3s var(--ease); }
.ep--pub .ep__link:hover .ep__go::after { transform: translateX(.3em); }
.ep__go--wait { color: var(--sumi-3); } .ep__go--wait::after { content: none; }
.ep--wait .ep__link { border-color: var(--rule); min-height: 10rem; }
@media (max-width: 760px) { .ep__link { min-height: 11rem; } .ep--wait .ep__link { min-height: 7rem; } }

/* ───────── 本とダウンロード ───────── */
.sec--book { padding-top: clamp(3.5rem, 9vh, 6.5rem) !important; }
.book { display: grid; grid-template-columns: minmax(12rem, 18rem) 1fr; gap: clamp(2rem, 5vw, 4rem); align-items: center; margin-bottom: 3rem; }
.book__cover { margin: 0; }
.book__cover img { border: 1px solid var(--rule); }
.book__cover figcaption { margin-top: .8rem; font-size: .82rem; color: var(--sumi-3); text-align: center; }
.book__title { margin: 0 0 1.2rem; font-family: var(--serif); font-size: clamp(1.7rem, 3.2vw, 2.3rem); font-weight: 700; letter-spacing: .08em; line-height: 1.2; }
.book__title span { display: block; font-size: 1rem; letter-spacing: .4em; color: var(--sumi-2); margin-top: .5rem; }
.spec { margin: 0 0 1.2rem; display: grid; grid-template-columns: 7rem 1fr; border-top: 1px solid var(--sumi); }
.spec dt, .spec dd { margin: 0; padding: .65rem 0; border-bottom: 1px solid var(--rule); font-size: .98rem; }
.spec dt { font-size: .85rem; letter-spacing: .12em; color: var(--sumi-2); }
.book__note { font-size: .98rem; margin: 0; color: var(--sumi-2); }
.dl { border-top: 1px solid var(--sumi); padding-top: 1.4rem; }
.dl h3 { margin: 0 0 .8rem; font-size: 1.1rem; letter-spacing: .1em; }
.dl__list { list-style: none; margin: 0; padding: 0; }
.dl__list li { border-bottom: 1px solid var(--rule); }
.dl__list li { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: .3rem 1.5rem; padding: .8rem .3rem; }
.dl__name { font-size: 1.02rem; }
a.dl__name:hover { text-decoration: underline; text-underline-offset: .2em; }
.dl__links { display: flex; gap: 1.6rem; }
.dl__links a { font: 700 .92rem/1.4 var(--serif); color: #111; border-bottom: 1px solid currentColor; }
.dl__links a::before { content: "↓ "; }
.dl__links small { display: inline-block; margin-left: .6em; font-weight: 400; font-family: var(--sans); color: var(--sumi-3); border: 0; }
.dl__links a:hover { background: #111; color: #fff; }
.dl__note { margin: .9rem 0 0; font-size: .9rem; color: var(--sumi-3); }
@media (max-width: 760px) { .book { grid-template-columns: 1fr; } .book__cover { max-width: 14rem; margin: 0 auto; } }

/* ───────── 語注 ───────── */
.goju-sample { margin-block: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr)); gap: 1rem; }
.goju-sample > div { background: #fff; border: 1px solid #111; padding: 1.1rem 1.2rem; }
.goju-sample dt { font-weight: 700; font-size: 1.05rem; margin-bottom: .4rem; }
.goju-sample dd { margin: 0; font-size: .95rem; line-height: 1.8; color: var(--sumi-2); }
.goju-sample cite { display: block; margin-top: .6rem; font: 400 .78rem/1 var(--serif); color: var(--sumi-3); }
a.w { border-bottom: 1px solid var(--rule); transition: border-color .2s, color .2s; }
a.w::after { content: "W"; font: 700 .62em/1 var(--serif); vertical-align: super; margin-left: .2em; color: #111; }
a.w:hover { background: #111; color: #fff; }
a.w:hover::after { color: #fff; }
.goju-tools { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem; margin-bottom: .6rem; }
.goju-note { margin: 0 0 2rem; font-size: .82rem; line-height: 1.7; color: var(--sumi-3); }
.search { font: 400 1rem/1.4 var(--sans); padding: .7rem 1rem; border: 1px solid #111; background: #fff; color: #111; width: min(100%, 28rem); border-radius: 0; }
.goju-count { font: 400 .88rem/1 var(--serif); color: var(--sumi-3); white-space: nowrap; }
.goju-group { margin-bottom: 2.6rem; }
.goju-group.is-empty { display: none; }
.goju-group h3 { font-size: 1.1rem; font-weight: 700; letter-spacing: .06em; margin: 0 0 .8rem; padding-bottom: .5rem; border-bottom: 1px solid var(--sumi); display: flex; align-items: baseline; gap: 1rem; }
.goju-group h3 small { font: 400 .8rem/1 var(--serif); color: var(--sumi-3); white-space: nowrap; }
.goju-list { margin: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(21rem, 1fr)); gap: 0 2.5rem; }
.goju-row { display: grid; grid-template-columns: 9rem 1fr; gap: .8rem; padding: .65rem 0; border-bottom: 1px solid var(--rule); font-size: .98rem; }
.goju-row.is-hidden { display: none; }
.goju-row dt { font-weight: 700; } .goju-row dd { margin: 0; color: var(--sumi-2); line-height: 1.8; }
.goju-row mark { background: #ddd; color: inherit; }

/* ───────── 公開の場 ───────── */
.next { display: grid; grid-template-columns: auto 1fr auto; gap: 1rem 2rem; align-items: baseline; padding: 1.4rem 1.5rem; margin-bottom: 1.4rem; background: #fff; border: 1px solid #111; border-left: 6px solid #111; }
.next__label { margin: 0; font-size: .85rem; letter-spacing: .3em; color: #111; font-weight: 700; }
.next__name { margin: 0; font-size: clamp(1.15rem, 2.4vw, 1.5rem); font-weight: 700; letter-spacing: .03em; }
.next__name span { display: block; font-size: .92rem; font-weight: 400; color: var(--sumi-2); margin-top: .3rem; }
.next__date { margin: 0; font: 700 clamp(1.1rem, 2.4vw, 1.5rem)/1 var(--serif); }
.next__count { grid-column: 1 / -1; margin: 0; font: 400 .92rem/1 var(--serif); color: var(--sumi-2); }
.next__count b { font-size: 1.4rem; font-weight: 700; color: var(--sumi); margin: 0 .2rem; }
.timeline { list-style: none; margin-block: 0; padding: 0; }
.tl { display: grid; grid-template-columns: 9rem 1fr; gap: .3rem 1.5rem; align-items: baseline; padding: .9rem 0 .9rem 1.4rem; position: relative; border-left: 1px solid var(--rule); }
.tl::before { content: ""; position: absolute; left: -4px; top: 1.4rem; width: 7px; height: 7px; border-radius: 50%; background: var(--sumi); }
.tl--past::before { background: #fff; border: 1px solid var(--sumi-3); box-sizing: border-box; }
.tl time { font: 700 .95rem/1.6 var(--serif); color: var(--sumi-2); }
.tl b { font-weight: 700; }
.tl span { grid-column: 2; font-size: .92rem; color: var(--sumi-2); }
.tl--past { color: var(--sumi-2); }
@media (max-width: 600px) { .tl { grid-template-columns: 1fr; } .tl span { grid-column: 1; } .next { grid-template-columns: 1fr; gap: .5rem; } }

/* ───────── 語り手になる ───────── */
.sec--join { padding-top: clamp(3.5rem, 9vh, 6.5rem) !important; }
.join { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(2rem, 6vw, 5rem); }
.join__big { margin: 0 0 1rem; font-family: var(--serif); font-size: clamp(1.4rem, 3.2vw, 2.1rem); font-weight: 700; letter-spacing: .03em; line-height: 1.6; }
.join__lead p { font-size: 1.05rem; }
.join__mail { margin: .9rem 0 0; font-size: .85rem; line-height: 1.7; color: var(--sumi-3); overflow-wrap: anywhere; }
.join__btns { display: grid; gap: .6rem; margin-top: 1.4rem; max-width: 24rem; }
.btn { display: block; text-align: center; font-size: .98rem; letter-spacing: .08em; padding: .9rem 1.4rem; border: 1px solid var(--sumi); color: var(--sumi); transition: background .3s, color .3s; }
.btn:hover { background: #111; color: #fff; }
.btn--shu { background: #111; border-color: #111; color: #fff; font-size: 1.1rem; padding: 1.1rem 1.4rem; }
.btn--shu:hover { background: #fff; color: #111; }
.steps { list-style: none; margin: 0; padding: 0; counter-reset: s; align-self: start; }
.steps li { counter-increment: s; display: grid; grid-template-columns: 2.6rem 1fr; gap: .2rem 1rem; padding: 1rem 0; border-bottom: 1px solid var(--rule); }
.steps li::before { content: counter(s); grid-row: 1 / 3; font: 700 1.6rem/1 var(--serif); color: #111; }
.steps b { font-weight: 700; letter-spacing: .06em; }
.steps span { font-size: .98rem; color: var(--sumi-2); line-height: 1.8; }
@media (max-width: 820px) { .join { grid-template-columns: 1fr; } }

/* ───────── フッター ───────── */
.site-foot { background: #fff; color: #111; border-top: 1px solid #111; padding: 3.5rem var(--gutter) 2rem; }
.foot__grid { max-width: var(--wide); margin: 0 auto; display: grid; grid-template-columns: 1.2fr 1fr 1.4fr; gap: 2.5rem; }
.foot__title { margin: 0 0 .5rem; font-family: var(--serif); font-size: 1.4rem; font-weight: 700; color: #111; letter-spacing: .08em; }
.foot__title span { font-size: .8rem; font-weight: 400; letter-spacing: .3em; margin-left: .8rem; color: var(--sumi-2); }
.foot__okuzuke { margin: 0; display: grid; grid-template-columns: 7rem 1fr; gap: .3rem .8rem; font-size: .9rem; }
.foot__okuzuke a { border-bottom: 1px solid currentColor; }
.foot__okuzuke dt { font-size: .78rem; letter-spacing: .12em; color: var(--sumi-2); } .foot__okuzuke dd { margin: 0; }
.foot__license p { margin: 0 0 .7em; font-size: .86rem; line-height: 1.8; color: var(--sumi-2); }
.foot__license a { border-bottom: 1px solid currentColor; font-family: var(--serif); color: #111; }
.foot__copy { max-width: var(--wide); margin: 2.5rem auto 0; display: flex; justify-content: space-between; align-items: center; font: 400 .8rem/1 var(--serif); color: var(--sumi-2); }
.totop { width: 2.6rem; height: 2.6rem; display: grid; place-items: center; border: 1px solid #111; color: #111; }
.totop:hover { background: #111; color: #fff; }
@media (max-width: 820px) { .foot__grid { grid-template-columns: 1fr; } }

/* ───────── 下層 ───────── */
body.sub .sec--page { padding-top: calc(var(--head-h) + 3rem); min-height: 100vh; }
.e404 { font: 700 6rem/1 var(--serif); margin: 0 0 1rem; color: #111; }

/* ───────── 読むページ ─────────
   青空文庫の XHTML 版にならう。横組み・一段・飾りなし。縦組みは切り替えで、横に流す。 */
body.read { --fs: 1.12rem; }
.readbar { position: fixed; top: var(--head-h); left: 0; right: 0; z-index: 50; display: flex; align-items: center; gap: 1rem; padding: .4rem var(--gutter); font-size: .85rem; letter-spacing: .04em; background: #fff; border-bottom: 1px solid #111; }
@media (min-width: 1100px) { .readbar { left: var(--side-w); } }
.readbar__back, .ctrl { white-space: nowrap; }
.readbar__back { color: #111; } .readbar__back:hover { text-decoration: underline; text-underline-offset: .2em; }
.readbar__now { flex: 1; color: var(--sumi-3); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.readbar__ctrl { display: flex; gap: .2rem; }
.ctrl { font: inherit; color: #111; background: #fff; border: 1px solid transparent; padding: .35rem .6rem; cursor: pointer; }
.ctrl:hover { border-color: #111; }
body.read .hen { padding-top: calc(var(--head-h) + 2.9rem); }
body.card-page .hen { padding-top: calc(var(--head-h) + 1rem); }

/* 図書カード */
.card { max-width: 44rem; margin: 0 auto; padding: clamp(2rem, 6vh, 3.5rem) var(--gutter) 2.5rem; }
.card__no { margin: 0 0 .6rem; font-size: .82rem; letter-spacing: .2em; color: var(--sumi-3); }
.card__toi { margin: 0 0 .4rem; font-family: var(--serif); font-size: .95rem; color: var(--sumi-2); }
.card__lead { margin: 0 0 .8rem; font-family: var(--serif); font-size: clamp(1.5rem, 3.4vw, 2.1rem); font-weight: 700; line-height: 1.6; letter-spacing: .03em; text-wrap: balance; word-break: auto-phrase; }
.card__lead::before { content: "「"; margin-left: -.5em; } .card__lead::after { content: "」"; }
.card__credit { margin: 0 0 2rem; font-family: var(--serif); font-size: 1.05rem; letter-spacing: .04em; display: flex; flex-wrap: wrap; gap: .3rem 1em; }
.card__h { margin: 1.6rem 0 .5rem; font-size: .95rem; font-weight: 700; letter-spacing: .12em; padding-bottom: .3rem; border-bottom: 1px solid var(--sumi); }
.card table { width: 100%; border-collapse: collapse; font-size: .95rem; }
.card th, .card td { text-align: left; vertical-align: top; padding: .55rem .6rem .55rem 0; border-bottom: 1px solid var(--rule); font-weight: 400; }
.card__data th { width: 7rem; color: var(--sumi-2); font-size: .85rem; letter-spacing: .1em; }
.card__files tr:first-child th { color: var(--sumi-3); font-size: .78rem; letter-spacing: .12em; }
.card__files td:first-child { font-family: var(--serif); font-weight: 700; width: 4.5rem; }
.card__files td:nth-child(2) { color: var(--sumi-2); }
.card__files a { color: #111; border-bottom: 1px solid currentColor; word-break: break-all; }
.card__files a:hover { background: #111; color: #fff; }
.card__files small { display: block; font: 400 .8rem/1.6 var(--serif); color: var(--sumi-3); }
.card a[rel="license"] { color: #111; border-bottom: 1px solid currentColor; }
@media (max-width: 600px) { .card__files td:nth-child(2) { display: none; } .card__files tr:first-child th:nth-child(2) { display: none; } }

.card__read { display: flex; flex-wrap: wrap; gap: .6rem; margin: 0 0 2.2rem; }
.card__read .btn { font-size: .95rem; padding: .8rem 1.4rem; }
.card__nav { display: flex; justify-content: space-between; gap: 1rem; margin-top: 2.5rem; padding-top: 1.2rem; border-top: 1px solid var(--rule); font-size: .9rem; letter-spacing: .06em; }
.card__nav a { display: flex; flex-direction: column; gap: .2rem; color: #111; }
.card__nav small { font-size: .72rem; letter-spacing: .2em; color: var(--sumi-3); }

/* 本文：横組み */
.hen__inner { max-width: 40rem; margin: 0 auto; padding: 3rem var(--gutter) 6rem; font-family: var(--serif); font-size: var(--fs); line-height: 2.05; display: flex; flex-direction: column; gap: 3.5rem; }
.tobira { display: flex; flex-direction: column; gap: 1rem; padding-bottom: 2rem; border-bottom: 1px solid var(--rule); }
.tobira__no { margin: 0; font-family: var(--sans); font-size: .8rem; letter-spacing: .3em; color: var(--sumi-3); }
.tobira__toi { margin: 0; font-size: .95rem; color: var(--sumi-2); line-height: 1.9; }
.tobira__lead { margin: 0; font-size: 1.7em; font-weight: 700; line-height: 1.55; letter-spacing: .04em; }
.tobira__credit { margin: 0; font-size: .95rem; display: flex; flex-wrap: wrap; gap: .3rem 1.5rem; }
.tobira__meta { margin: 0; font: 400 .85rem/1 var(--serif); letter-spacing: .08em; color: var(--sumi-3); }
.honbun p { margin: 0 0 1.1em; text-indent: 1em; }
.honbun .toi { margin: 1.8em 0 1.1em; color: #111; font-weight: 700; text-indent: 0; }
.honbun .toi::before { content: "──"; }
.zuhan { margin: 2rem 0; }
.zuhan img { border: 1px solid var(--rule); }
.zuhan figcaption { font-family: var(--sans); font-size: .84rem; line-height: 1.8; color: var(--sumi-2); margin-top: .6rem; }
.goju { padding-top: 2rem; border-top: 1px solid var(--rule); }
.goju h2 { margin: 0 0 1rem; font-family: var(--sans); font-size: .8rem; font-weight: 400; letter-spacing: .3em; color: var(--sumi-3); }
.goju dl { margin: 0; }
.goju dl > div { font-size: .95rem; line-height: 1.9; margin: 0 0 .7em; }
.goju dt { font-weight: 700; display: inline; } .goju dt::after { content: "　"; }
.goju dd { margin: 0; display: inline; color: var(--sumi-2); }
.hen__end { display: flex; flex-direction: column; gap: 1.5rem; }
.hen__nav { display: flex; justify-content: space-between; gap: 1rem; font-family: var(--sans); font-size: .9rem; letter-spacing: .08em; }
.hen__nav a { display: flex; flex-direction: column; gap: .3rem; color: #111; }
.hen__nav small { font-size: .72rem; letter-spacing: .2em; color: var(--sumi-3); }
.hen__license { margin: 0; font-family: var(--sans); font-size: .8rem; color: var(--sumi-3); letter-spacing: .04em; }
.owari { font-size: 1.4rem; color: var(--sumi-3); letter-spacing: .3em; align-self: center; }

/* 本文：縦組み（切り替え）。画面の高さいっぱいに組んで、横に流す */
.read--tate .hen__scroll { height: calc(100svh - var(--head-h) - 2.9rem); overflow-x: auto; overflow-y: hidden; overscroll-behavior-x: contain; }
.read--tate .hen__inner { writing-mode: vertical-rl; text-orientation: mixed; max-width: none; height: 100%; width: max-content; margin: 0; padding: clamp(1.2rem, 3vh, 2rem) clamp(1.5rem, 5vw, 4rem); flex-direction: column; align-items: flex-start; gap: clamp(2rem, 5vw, 4rem); }
.read--tate .tobira { height: 100%; gap: 1.4rem; padding: 0; padding-block-end: 2rem; border: 0; border-block-end: 1px solid var(--rule); }
.read--tate .tobira__toi { max-block-size: 24em; }
.read--tate .tobira__lead { max-block-size: 22em; }
.read--tate .tobira__credit { flex-direction: column; }
.read--tate .honbun { display: flex; flex-direction: column; flex-wrap: wrap; align-content: flex-start; height: 100%; }
.read--tate .honbun p { margin: 0; max-block-size: 100%; }
.read--tate .honbun .toi { margin: 0; margin-inline-start: .9em; margin-inline-end: .5em; }
.read--tate .zuhan { margin: 0 1em; max-block-size: 100%; display: flex; flex-direction: column; gap: .6rem; }
.read--tate .zuhan img { max-block-size: 60vh; max-inline-size: 26rem; width: auto; height: auto; }
.read--tate .zuhan figcaption { max-block-size: 26rem; margin: 0; }
.read--tate .goju { display: flex; flex-direction: column; gap: 1rem; height: 100%; padding: 0; padding-block-start: 2rem; border: 0; border-block-start: 1px solid var(--rule); }
.read--tate .goju h2 { margin: 0; }
.read--tate .goju dl { display: flex; flex-direction: column; flex-wrap: wrap; align-content: flex-start; height: 100%; }
.read--tate .goju dl > div { max-block-size: 100%; margin: 0; margin-inline-end: .6em; }
.read--tate .goju a.w::after { text-combine-upright: all; }
.read--tate .hen__end { justify-content: center; }
.read--tate .hen__nav { flex-direction: column; }
.read--tate .owari { margin-inline-start: 1rem; }
@media (max-width: 760px) { .readbar__now { display: none; } .readbar { gap: .3rem; font-size: .8rem; } .readbar__back { flex: 1; } .ctrl { padding: .35rem .4rem; } }

/* 撮影用（?shot）：100svh の KV を固定高にする */
.shot .kv, .shot .kv__inner { min-height: 880px; }
.shot .reveal { opacity: 1; transform: none; }

/* 印刷：動きと固定の部品を外す */
@media print {
  .site-head, .readbar, .kv__field, .kv__scroll, .totop { display: none !important; }
  body { padding-left: 0 !important; }
  .reveal { opacity: 1 !important; transform: none !important; }
  body.read .hen, body.card-page .hen, body.sub .sec--page { padding-top: 0; }
}