/* 名残文庫 — 基本色はブランド仕様書 v1.1 に準拠（墨黒・生成り・灰色・古褐色） */
:root {
  --bg: #F5F1E8;          /* 生成り */
  --fg: #22211F;          /* 墨黒 */
  --sub: #5F5C56;         /* 文字用の灰色（#8A8780 は小さい文字だと読みにくいので濃いめ） */
  --mute: #8A8780;        /* 灰色：線・飾り */
  --line: #DCD6CA;
  --soft: #E6E0D4;
  --panel: #ECE6DA;
  --card: #FAF8F2;
  --accent: #8C6252;      /* 古褐色 */
  --dark: #22211F;
  --on-dark: #F5F1E8;
  --mincho: "Shippori Mincho", "Hiragino Mincho ProN", "Yu Mincho", "YuMincho", serif;
  --gothic: "Zen Kaku Gothic New", "Hiragino Sans", "Yu Gothic", "Meiryo", sans-serif;
  --fs: 18px;
  color-scheme: light;
}
:root[data-theme="white"] {
  --bg: #FFFFFF; --fg: #1F1F1F; --sub: #595959; --mute: #8A8780; --line: #E2E2E2; --soft: #EDEDED;
  --panel: #F3F3F3; --card: #FAFAFA;
}
:root[data-theme="night"] {
  --bg: #22211F; --fg: #ECE6DA; --sub: #ABA49A; --mute: #8A8780; --line: #3D3B37; --soft: #33312E;
  --panel: #2B2A27; --card: #282725; --accent: #C9A595; --dark: #ECE6DA; --on-dark: #22211F;
  color-scheme: dark;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --bg: #22211F; --fg: #ECE6DA; --sub: #ABA49A; --mute: #8A8780; --line: #3D3B37; --soft: #33312E;
    --panel: #2B2A27; --card: #282725; --accent: #C9A595; --dark: #ECE6DA; --on-dark: #22211F;
    color-scheme: dark;
  }
}
:root[data-size="s"] { --fs: 16px; }
:root[data-size="l"] { --fs: 21px; }
@media (max-width: 720px) {
  :root { --fs: 17px; }
  :root[data-size="s"] { --fs: 15px; }
  :root[data-size="l"] { --fs: 20px; }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font-family: var(--gothic); font-size: 15px; line-height: 1.8;
  font-feature-settings: "palt" 0;
}
img { max-width: 100%; height: auto; }
a { color: inherit; }
a:hover { color: var(--accent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 8px; background: var(--bg); padding: 8px 12px; z-index: 10; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }
h1, h2 { font-family: var(--mincho); font-weight: 600; }

/* ロゴの出し分け（夜モードは白文字版） */
.logo-light { display: none !important; }
:root[data-theme="night"] .logo-dark { display: none !important; }
:root[data-theme="night"] .logo-light { display: block !important; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .logo-dark { display: none !important; }
  :root:not([data-theme]) .logo-light { display: block !important; }
}

/* ヘッダー */
.site-header { border-bottom: 1px solid var(--line); }
.header-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 4px 24px; padding-top: 14px; padding-bottom: 14px; }
.logo { display: flex; align-items: center; min-height: 44px; }
.logo img { height: 42px; width: auto; display: block; }
.main-nav { display: flex; flex-wrap: wrap; gap: 0 24px; font-size: 14px; }
.main-nav a { text-decoration: none; padding: 10px 0; display: inline-block; }
.main-nav .nav-yt { color: var(--accent); font-weight: 500; }
@media (max-width: 720px) {
  .logo img { height: 34px; }
  .main-nav { gap: 0 18px; font-size: 13px; }
  .is-reader .main-nav { display: none; }
}

/* トップ */
.hero { padding: 72px 20px 88px; display: flex; flex-direction: column; align-items: center; gap: 36px; text-align: center; }
.hero .symbol { width: 84px; }
.tagline { margin: 0; writing-mode: vertical-rl; font-size: 34px; font-weight: 400; letter-spacing: .3em; line-height: 1.9; height: 10.5em; text-align: start; white-space: nowrap; }
.lead { margin: 0; color: var(--sub); line-height: 2; }
.btn-outline, .btn {
  display: inline-flex; align-items: center; gap: 10px; min-height: 48px; padding: 0 26px;
  border: 1px solid var(--fg); border-radius: 999px; text-decoration: none; font-size: 14px; letter-spacing: .08em;
}
.btn { background: var(--dark); color: var(--on-dark); border-color: var(--dark); }
.btn:hover { color: var(--on-dark); opacity: .88; }
@media (max-width: 720px) { .hero { padding: 48px 20px 64px; } .tagline { font-size: 28px; } }

.section { padding-bottom: 80px; }
.page-top { padding-top: 56px; padding-bottom: 32px; }
.page-title { margin: 0 0 6px; font-size: 30px; letter-spacing: .14em; }
.eyebrow { margin: 0 0 8px; font-size: 13px; }
.section-head { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 8px 16px; border-bottom: 1px solid var(--line); padding-bottom: 14px; margin-bottom: 28px; }
.section-head h2 { margin: 0; font-size: 25px; letter-spacing: .12em; }
.section-head a { font-size: 14px; padding: 10px 0; }
.sub { margin: 4px 0 0; color: var(--sub); font-size: 13px; }
.empty { color: var(--sub); }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr)); gap: 20px; }
.card {
  display: flex; flex-direction: column; gap: 12px; padding: 26px; background: var(--card);
  border: 1px solid var(--line); border-radius: 4px; text-decoration: none; color: var(--fg);
  transition: border-color .2s;
}
.card:hover { color: var(--fg); border-color: var(--accent); }
.card-big { padding: 30px; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; font-size: 12px; letter-spacing: .08em; }
.tag { padding: 2px 10px; border: 1px solid var(--line); border-radius: 999px; color: var(--sub); }
.tag-accent { border-color: var(--accent); color: var(--accent); }
.tag-progress { border-color: transparent; background: var(--panel); color: var(--fg); }
.card-title { font-family: var(--mincho); font-size: 24px; font-weight: 600; letter-spacing: .06em; line-height: 1.5; }
.card-big .card-title { font-size: 27px; }
.card-summary { font-size: 14px; line-height: 1.9; color: var(--sub); }
.card-meta { margin-top: auto; padding-top: 12px; border-top: 1px solid var(--soft); font-size: 12px; color: var(--sub); display: flex; flex-wrap: wrap; gap: 4px 16px; }

.band { background: var(--panel); padding: 64px 0; }
.band h2 { margin: 0 0 24px; font-size: 25px; letter-spacing: .12em; }
.chips { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 16px; }
.chip { display: inline-flex; align-items: center; min-height: 44px; padding: 0 22px; background: var(--bg); border: 1px solid var(--line); border-radius: 999px; text-decoration: none; font-size: 14px; }
.about { max-width: 720px; padding-top: 88px; padding-bottom: 88px; text-align: center; }
.about h2 { margin: 0 0 20px; font-size: 22px; letter-spacing: .16em; }
.about p { margin: 0; color: var(--sub); line-height: 2.1; }

/* フッター */
.site-footer { border-top: 1px solid var(--line); background: var(--panel); padding: 48px 0 36px; }
.footer-inner { display: flex; flex-direction: column; align-items: center; gap: 24px; text-align: center; }
.footer-inner > img { height: 38px; width: auto; }
.sns { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; }
.pill { display: inline-flex; align-items: center; min-height: 44px; padding: 0 18px; border: 1px solid var(--line); border-radius: 999px; text-decoration: none; font-size: 13px; letter-spacing: .06em; background: var(--bg); }
.pill-main { background: var(--dark); color: var(--on-dark); border-color: var(--dark); }
.pill-main:hover { color: var(--on-dark); opacity: .88; }
.copy { margin: 0; font-size: 12px; color: var(--sub); letter-spacing: .1em; }

/* 読書画面 */
.reader-top { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; padding-top: 20px; }
.toolbar { position: relative; flex: 1 1 auto; }
.toolbar-toggle { display: none; }
.toolbar-panel { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 26px; padding: 10px 16px; background: var(--panel); border-radius: 8px; font-size: 13px; }
.seg { display: flex; align-items: center; gap: 10px; }
.seg-label { color: var(--sub); }
.seg-btns { display: flex; border: 1px solid var(--line); border-radius: 999px; overflow: hidden; }
.seg-btns button { min-height: 40px; min-width: 52px; padding: 0 12px; border: 0; background: transparent; color: var(--fg); font: inherit; cursor: pointer; }
.seg-btns button[aria-pressed="true"] { background: var(--dark); color: var(--on-dark); }
.toc-link { font-size: 14px; padding: 10px 4px; }
@media (max-width: 720px) {
  .reader-top { padding-top: 10px; gap: 8px; }
  .toolbar-toggle { display: inline-flex; align-items: center; gap: 6px; min-height: 44px; padding: 0 14px; border: 1px solid var(--line); border-radius: 999px; background: transparent; color: var(--fg); font: inherit; font-size: 13px; cursor: pointer; }
  .toolbar-panel { display: none; position: absolute; z-index: 5; top: 52px; left: 0; right: auto; width: min(340px, calc(100vw - 40px)); flex-direction: column; align-items: stretch; gap: 12px; box-shadow: 0 6px 24px rgba(0,0,0,.15); }
  .toolbar.open .toolbar-panel { display: flex; }
  .seg { justify-content: space-between; }
}

.listen { flex: 1 1 100%; border: 1px solid var(--line); border-radius: 8px; }
.listen summary { display: flex; align-items: center; gap: 12px; min-height: 52px; padding: 0 16px; cursor: pointer; font-size: 14px; list-style: none; }
.listen summary::-webkit-details-marker { display: none; }
.listen summary svg { width: 30px; height: 30px; padding: 8px; border-radius: 50%; background: var(--dark); color: var(--on-dark); flex: none; }
.video { aspect-ratio: 16 / 9; margin: 0 16px 16px; }
.video iframe { width: 100%; height: 100%; border: 0; border-radius: 4px; }

.resume { position: fixed; z-index: 6; left: 50%; bottom: 24px; transform: translateX(-50%); display: flex; align-items: center; gap: 4px; padding: 6px 6px 6px 8px; background: var(--dark); color: var(--on-dark); border-radius: 999px; box-shadow: 0 6px 24px rgba(0,0,0,.2); font-size: 14px; }
.resume[hidden] { display: none; }
.resume button { border: 0; background: transparent; color: inherit; font: inherit; cursor: pointer; min-height: 44px; }
.resume-btn { display: inline-flex; align-items: center; gap: 8px; padding: 0 12px; }
.resume-close { width: 44px; font-size: 18px; }

.text-frame { padding: 40px 20px 48px; }
.text { font-family: var(--mincho); font-size: var(--fs); line-height: 2.05; letter-spacing: .04em; max-width: 34em; margin: 0 auto; outline: none; }
.text p { margin: 0; text-indent: 1em; }
.text p.sep { text-indent: 0; text-align: center; color: var(--mute); margin: 1.6em 0; letter-spacing: 0; }
.text p.gap { height: 1em; }
.text ruby rt { font-size: .5em; letter-spacing: 0; }
.tcy { text-combine-upright: all; -webkit-text-combine: horizontal; }
.work-head { margin-bottom: 2.6em; }
.work-tags { display: flex; gap: 10px; margin: 0 0 .8em; font-family: var(--gothic); font-size: 12px; letter-spacing: .12em; text-indent: 0; }
.work-tags span, .work-tags a { color: var(--accent); text-decoration: none; padding: 1px 10px; border: 1px solid var(--accent); border-radius: 999px; }
.work-title { margin: 0 0 .3em; font-size: 1.75em; letter-spacing: .14em; line-height: 1.5; }
.chapter-name { margin: 0 0 .4em !important; font-size: 1.15em; text-indent: 0 !important; }
.work-meta { margin: 0 !important; text-indent: 0 !important; font-family: var(--gothic); font-size: 12px; color: var(--sub); letter-spacing: .04em; }
.end-mark { text-align: center; text-indent: 0 !important; color: var(--mute); margin: 2.4em 0 0 !important; letter-spacing: .3em; }
.next-chapter { display: block; margin-top: 2.4em; text-align: center; font-family: var(--gothic); font-size: 15px; padding: 14px; border: 1px solid var(--line); border-radius: 999px; text-decoration: none; }

/* 縦書き */
html[data-mode="v"] .text-frame { padding: 24px 20px 32px; }
html[data-mode="v"] .text {
  writing-mode: vertical-rl; -webkit-writing-mode: vertical-rl;
  max-width: none; width: 100%;
  height: min(calc(100vh - 190px), 42em); height: min(calc(100svh - 190px), 42em);
  overflow-x: auto; overflow-y: hidden; padding: 4px 2px 18px;
  overscroll-behavior-x: contain;
}
html[data-mode="v"] .work-head { margin: 0 0 0 2.4em; }
html[data-mode="v"] .work-tags { margin: 0 0 0 1em; }
html[data-mode="v"] .work-tags span, html[data-mode="v"] .work-tags a { padding: 10px 1px; }
html[data-mode="v"] .work-title { margin: 0 0 0 .4em; }
html[data-mode="v"] .chapter-name { margin: 0 0 0 .4em !important; }
html[data-mode="v"] .text p.sep { margin: 0 1.6em; }
html[data-mode="v"] .end-mark { margin: 0 2.4em 0 0 !important; }
html[data-mode="v"] .next-chapter { margin: 0 2.4em 0 0; padding: 14px 10px; }
@media (max-width: 720px) {
  html[data-mode="v"] .text-frame { padding: 16px 16px 24px; }
  html[data-mode="v"] .text { height: calc(100vh - 150px); height: calc(100svh - 150px); }
}

.progress { position: fixed; left: 0; right: 0; bottom: 0; height: 3px; background: transparent; z-index: 4; }
.progress span { display: block; height: 100%; width: 0; background: var(--accent); }
html[data-mode="v"] .progress span { margin-left: auto; }

.work-nav { display: flex; justify-content: space-between; gap: 16px; border-top: 1px solid var(--line); padding: 24px 0 64px; }
.work-nav a { display: flex; flex-direction: column; gap: 2px; text-decoration: none; padding: 8px 0; max-width: 48%; }
.work-nav .next { text-align: right; align-items: flex-end; margin-left: auto; }
.nav-label { font-size: 12px; color: var(--sub); }
.nav-title { font-family: var(--mincho); font-size: 18px; }

/* 目次 */
.toc-page { max-width: 760px; padding-top: 56px; padding-bottom: 32px; display: flex; flex-direction: column; gap: 32px; }
.toc-page .work-head { margin: 0; text-align: center; font-size: 22px; }
.toc-page .work-tags { justify-content: center; }
.toc-summary { margin: 0; font-family: var(--mincho); font-size: 17px; line-height: 2.1; color: var(--sub); text-align: center; }
.resume-box { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px; padding: 22px 26px; background: var(--panel); border-radius: 8px; }
.resume-box[hidden] { display: none; }
.resume-box > div { display: flex; flex-direction: column; }
.resume-chapter { font-family: var(--mincho); font-size: 18px; }
.toc h2 { margin: 0 0 10px; font-size: 22px; letter-spacing: .2em; }
.toc-row { display: flex; align-items: center; gap: 18px; min-height: 64px; padding: 10px 4px; border-top: 1px solid var(--line); text-decoration: none; }
.toc-row:last-child { border-bottom: 1px solid var(--line); }
.toc-no { width: 2.4em; color: var(--accent); font-size: 13px; letter-spacing: .1em; }
.toc-title { flex: 1; font-family: var(--mincho); font-size: 19px; }
.toc-len, .toc-state { font-size: 12px; color: var(--sub); }
.toc-state { width: 4em; text-align: right; }
.toc-state.now { color: var(--accent); }
@media (max-width: 720px) { .toc-len { display: none; } }

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