/* ── Tokens ── */
:root {
  --ink:     #1c1917;
  --ink-2:   #44403c;
  --ink-3:   #a8a29e;
  --bg:      #faf9f7;
  --bg-2:    #f0ede7;
  --bg-3:    #e7e0d8;
  --gold:    #a87630;
  --accent:  #7c3022;
  --link:    #5b4034;
  --r:       6px;
  --rw:      'Crimson Pro', Georgia, serif;
  --uf:      'Inter', system-ui, sans-serif;
  --rmax:    68ch;
  --fs:      1.2rem;
  --lh:      1.9;
}
[data-theme="dark"] {
  --ink:   #e8e0d5;
  --ink-2: #a8a29e;
  --ink-3: #78716c;
  --bg:    #171412;
  --bg-2:  #201d1a;
  --bg-3:  #2a2623;
  --gold:  #c9a55a;
  --accent:#c97a55;
  --link:  #c9a55a;
}

/* ── Reset ── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--uf);background:var(--bg);color:var(--ink);
  min-height:100vh;display:flex;flex-direction:column;
  transition:background .25s,color .25s;
}
main{flex:1}
a{color:var(--link);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto;display:block}

/* ── Layout ── */
.wrap{max-width:900px;margin:0 auto;padding:0 1.5rem}

/* ── Nav ── */
.site-header{
  position:sticky;top:0;z-index:60;
  border-bottom:1px solid var(--bg-3);
  background:color-mix(in srgb,var(--bg) 88%,transparent);
  backdrop-filter:blur(10px);
}
.nav-wrap{
  max-width:900px;margin:0 auto;padding:.7rem 1.5rem;
  display:flex;align-items:center;justify-content:space-between;
}
.site-logo{display:flex;align-items:center;gap:.45rem;color:var(--ink);text-decoration:none}
.logo-glyph{font-size:1.25rem;color:var(--gold)}
.logo-name{font-family:var(--rw);font-size:1.05rem;font-weight:600}
.icon-btn{
  background:none;border:none;cursor:pointer;color:var(--ink-2);
  padding:.35rem .4rem;border-radius:var(--r);
  display:flex;align-items:center;gap:.2rem;
  font-family:var(--uf);font-size:.78rem;font-weight:500;
  transition:color .15s,background .15s;
}
.icon-btn:hover{color:var(--ink);background:var(--bg-2)}

/* ── Home ── */
.hero{
  text-align:center;padding:4rem 1.5rem 2rem;
  border-bottom:1px solid var(--bg-3);
}
.hero-title{
  font-family:var(--rw);
  font-size:clamp(2.2rem,6vw,3.6rem);
  font-weight:600;letter-spacing:-.02em;line-height:1.1;
}
.hero-title::after{
  content:'';display:block;width:3rem;height:2px;
  background:var(--gold);margin:.75rem auto 0;
}
.hero-sub{margin-top:.6rem;color:var(--ink-3);font-size:.9rem}

.book-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(185px,1fr));
  gap:2rem;padding-top:2.5rem;padding-bottom:3.5rem;
}
.book-card{
  display:flex;flex-direction:column;color:inherit;text-decoration:none;
  border-radius:var(--r);transition:transform .2s;
}
.book-card:hover{transform:translateY(-4px);text-decoration:none}
.cover-wrap{
  aspect-ratio:2/3;border-radius:var(--r);overflow:hidden;
  background:var(--bg-3);
  box-shadow:0 4px 18px rgba(0,0,0,.14);
}
.cover-img{width:100%;height:100%;object-fit:cover}
.cover-stub{
  width:100%;height:100%;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(145deg,var(--bg-3),var(--bg-2));
  font-family:var(--rw);font-size:4.5rem;font-weight:700;color:var(--gold);
}
.card-body{padding:.7rem .15rem 0}
.card-title{
  font-family:var(--rw);font-size:.98rem;font-weight:600;line-height:1.3;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-author{font-size:.78rem;color:var(--ink-3);margin-top:.2rem}
.card-badge{
  display:inline-block;margin-top:.4rem;
  font-size:.7rem;background:var(--bg-2);color:var(--ink-3);
  padding:.12rem .45rem;border-radius:999px;
}

/* ── Book Detail ── */
.page-book{padding-bottom:4rem}
.book-header{
  display:grid;grid-template-columns:190px 1fr;
  gap:2.5rem;align-items:start;padding-top:3rem;
}
.cover-lg{
  width:100%;border-radius:var(--r);
  box-shadow:0 8px 32px rgba(0,0,0,.2);
}
.cover-lg-stub{
  width:100%;aspect-ratio:2/3;border-radius:var(--r);
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(145deg,var(--bg-3),var(--bg-2));
  font-family:var(--rw);font-size:5rem;font-weight:700;color:var(--gold);
  box-shadow:0 8px 32px rgba(0,0,0,.14);
}
.eyebrow{
  font-size:.72rem;font-weight:500;text-transform:uppercase;
  letter-spacing:.12em;color:var(--gold);
}
.book-title{
  font-family:var(--rw);
  font-size:clamp(1.5rem,3.5vw,2.3rem);font-weight:600;
  line-height:1.2;margin-top:.35rem;
}
.book-author{font-size:.95rem;color:var(--ink-2);margin-top:.4rem}
.book-desc{
  font-size:.92rem;line-height:1.7;color:var(--ink-2);
  margin-top:.9rem;
  padding-left:1rem;border-left:3px solid var(--bg-3);
}
.book-cta{display:flex;align-items:center;gap:1rem;margin-top:1.4rem}
.btn-read{
  display:inline-block;
  background:var(--accent);color:#fff;
  padding:.6rem 1.4rem;border-radius:var(--r);
  font-size:.88rem;font-weight:500;
  transition:opacity .2s;
}
.btn-read:hover{opacity:.82;text-decoration:none}
.ch-count{font-size:.82rem;color:var(--ink-3)}

.toc-section{margin-top:3rem;padding-bottom:3rem}
.toc-head{
  font-family:var(--rw);font-size:1.3rem;font-weight:600;
  padding-bottom:.7rem;border-bottom:1px solid var(--bg-3);
  margin-bottom:.5rem;
}
.toc-list{list-style:none}
.toc-row{
  display:flex;align-items:baseline;gap:.9rem;
  padding:.55rem .4rem;border-radius:var(--r);
  color:var(--ink-2);font-size:.93rem;
  transition:background .15s,color .15s;
}
.toc-row:hover{background:var(--bg-2);color:var(--ink);text-decoration:none}
.toc-num{
  min-width:2.5rem;text-align:right;
  font-size:.75rem;color:var(--ink-3);font-variant-numeric:tabular-nums;
  flex-shrink:0;
}
.toc-title{flex:1}
.toc-list li+li{border-top:1px solid var(--bg-2)}

/* ── Reader ── */
.reading-bar{
  position:fixed;top:0;left:0;height:2px;
  background:var(--gold);width:0%;z-index:200;
  transition:width .12s linear;
}
.reader-bar{
  position:sticky;top:var(--nav-h,49px);z-index:50;
  background:color-mix(in srgb,var(--bg) 90%,transparent);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--bg-3);
}
.reader-bar-inner{
  display:flex;align-items:center;justify-content:space-between;
  padding-top:.45rem;padding-bottom:.45rem;gap:.75rem;
}
.back-link{
  display:flex;align-items:center;gap:.25rem;
  font-size:.8rem;color:var(--ink-3);
  transition:color .15s;white-space:nowrap;
}
.back-link:hover{color:var(--ink);text-decoration:none}
.reader-book-name{
  font-size:.78rem;color:var(--ink-3);
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
  flex:1;text-align:center;
}
.fs-controls{display:flex;gap:.2rem;flex-shrink:0}

.reader{padding:2.5rem 0 3rem}
.ch-header{text-align:center;padding-bottom:2rem;border-bottom:1px solid var(--bg-3);margin-bottom:2.5rem}
.ch-eyebrow{font-size:.72rem;font-weight:500;text-transform:uppercase;letter-spacing:.1em;color:var(--gold);margin-bottom:.5rem}
.ch-title{font-family:var(--rw);font-size:clamp(1.4rem,3vw,2rem);font-weight:600;line-height:1.25}

/* ── Chapter Body ── */
.ch-body{
  font-family:var(--rw);
  font-size:var(--fs);line-height:var(--lh);
  color:var(--ink);max-width:var(--rmax);
}
.ch-body p{margin-bottom:1.1em;text-align:justify}
.ch-body p:first-child::first-letter{
  font-size:3.6em;font-weight:600;float:left;
  line-height:.75;padding-right:.1em;
  color:var(--gold);font-family:var(--rw);
}
.ch-body h1,.ch-body h2,.ch-body h3{
  font-family:var(--rw);font-weight:600;line-height:1.25;
  margin:2em 0 .75em;
}
.ch-body h1{font-size:1.55em}
.ch-body h2{font-size:1.3em}
.ch-body h3{font-size:1.1em;color:var(--ink-2)}
.ch-body blockquote{
  border-left:3px solid var(--gold);padding-left:1.2em;
  color:var(--ink-2);margin:1.5em 0;font-style:italic;
}
.ch-body img{
  max-width:100%;border-radius:var(--r);
  margin:1.75em auto;
  box-shadow:0 4px 18px rgba(0,0,0,.12);
}
.ch-body hr{
  border:none;border-top:1px solid var(--bg-3);
  margin:2.5em auto;width:35%;
}
.ch-body ul,.ch-body ol{padding-left:1.75em;margin-bottom:1em}
.ch-body li{margin-bottom:.4em}

/* ── Chapter Nav ── */
.ch-nav{padding:1.5rem 1.5rem 3.5rem}
.ch-nav-grid{
  display:grid;grid-template-columns:1fr auto 1fr;
  gap:1rem;align-items:center;
  border-top:1px solid var(--bg-3);padding-top:1.5rem;
}
.nav-btn{
  display:flex;align-items:center;gap:.65rem;
  padding:.7rem .9rem;border-radius:var(--r);
  background:var(--bg-2);color:var(--ink-2);
  transition:background .2s,color .2s;
  min-width:0;
}
.nav-btn:hover{background:var(--bg-3);color:var(--ink);text-decoration:none}
.nav-btn span{display:flex;flex-direction:column;min-width:0}
.nav-btn small{font-size:.68rem;color:var(--ink-3)}
.nav-btn strong{font-size:.82rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.nav-next{justify-content:flex-end;text-align:right}
.nav-toc{
  font-size:1.2rem;text-align:center;
  padding:.45rem .55rem;border-radius:var(--r);
  transition:background .15s;
}
.nav-toc:hover{background:var(--bg-2);text-decoration:none}

/* ── Footer ── */
.site-footer{
  text-align:center;padding:1.25rem;
  font-size:.78rem;color:var(--ink-3);
  border-top:1px solid var(--bg-3);margin-top:auto;
}
.site-footer em{color:var(--gold);font-style:normal}

/* ── Responsive ── */
@media(max-width:640px){
  .book-header{grid-template-columns:1fr}
  .cover-col{max-width:160px}
  .nav-btn strong{display:none}
  .reader-book-name{display:none}
  .ch-body p:first-child::first-letter{float:none;font-size:1em;padding:0;color:inherit}
}

/* ── Reading background overrides (set via data-reading-bg on html) ── */
[data-reading-bg="sepia"]{--bg:#faf3e5;--bg-2:#f0e8d0;--bg-3:#e5d8b8;--ink:#3d2f18;--ink-2:#6b5539;--ink-3:#9b8060;--gold:#9b6c1a}
[data-reading-bg="dark"] {--bg:#171412;--bg-2:#201d1a;--bg-3:#2a2623;--ink:#e8e0d5;--ink-2:#a8a29e;--ink-3:#78716c;--gold:#c9a55a}
[data-reading-bg="light"]{/* uses :root theme vars */}

/* ── Header auto-hide ── */
.site-header{transition:transform .3s cubic-bezier(.4,0,.2,1);}
.site-header.hdr-hidden{transform:translateY(-100%)}

/* ── Reader sub-nav ── */
.reader-subnav{
  position:sticky;top:0;z-index:55;
  background:color-mix(in srgb,var(--bg) 92%,transparent);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--bg-3);
  transition:transform .3s cubic-bezier(.4,0,.2,1);
}
.reader-subnav.hdr-hidden{transform:translateY(calc(-100% - 50px))}
.reader-subnav-in{
  display:flex;align-items:center;justify-content:space-between;
  padding:.45rem 1.5rem;gap:.75rem;
}
.rdr-book-name{
  font-size:.78rem;color:var(--ink-3);
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1;text-align:center;
}

/* ── Float bar ── */
.float-bar{
  position:fixed;bottom:1.5rem;left:50%;
  transform:translateX(-50%);
  display:flex;align-items:center;
  background:var(--bg);border:1px solid var(--bg-3);
  border-radius:99px;padding:.35rem .45rem;
  box-shadow:0 4px 28px rgba(0,0,0,.18),0 1px 6px rgba(0,0,0,.08);
  z-index:60;
  transition:transform .3s cubic-bezier(.4,0,.2,1),opacity .3s,bottom .2s;
}
.float-bar.fbar-hidden{
  transform:translateX(-50%) translateY(calc(100% + 2rem));
  opacity:0;pointer-events:none;
}
.fbar-btn{
  display:flex;flex-direction:column;align-items:center;gap:.12rem;
  padding:.45rem .75rem;border-radius:99px;
  font-size:.62rem;font-weight:500;color:var(--ink-2);
  border:none;background:none;cursor:pointer;text-decoration:none;
  transition:background .15s,color .15s;min-width:48px;
}
.fbar-btn:hover{background:var(--bg-2);color:var(--ink);text-decoration:none}
.fbar-disabled{opacity:.28;pointer-events:none}
.fbar-sep{width:1px;height:24px;background:var(--bg-3);margin:0 .1rem;flex-shrink:0}

/* ── Backdrop ── */
.backdrop{
  position:fixed;inset:0;background:rgba(0,0,0,.45);
  z-index:70;opacity:0;pointer-events:none;
  transition:opacity .3s;
}
.backdrop.panel-open{opacity:1;pointer-events:auto}
.no-scroll{overflow:hidden}

/* ── Settings panel ── */
.sp-panel{
  position:fixed;bottom:0;left:0;right:0;
  background:var(--bg);border-top:1px solid var(--bg-3);
  border-radius:16px 16px 0 0;
  z-index:80;
  transform:translateY(100%);
  transition:transform .32s cubic-bezier(.4,0,.2,1);
  max-height:80vh;display:flex;flex-direction:column;
}
.sp-panel.panel-open{transform:translateY(0)}
.sp-handle{
  width:40px;height:4px;border-radius:99px;
  background:var(--bg-3);margin:.6rem auto .2rem;flex-shrink:0;
}
.sp-head{
  display:flex;align-items:center;justify-content:space-between;
  padding:.6rem 1.25rem .5rem;flex-shrink:0;
}
.sp-head-title{font-size:.88rem;font-weight:600}
.sp-close{
  background:none;border:none;cursor:pointer;
  color:var(--ink-3);padding:.2rem;border-radius:var(--r);
  transition:color .15s,background .15s;
}
.sp-close:hover{color:var(--ink);background:var(--bg-2)}
.sp-body{overflow-y:auto;padding:.5rem 1.25rem 2rem}
.sp-group{margin-bottom:1.1rem}
.sp-label{
  font-size:.68rem;font-weight:600;text-transform:uppercase;
  letter-spacing:.08em;color:var(--ink-3);margin-bottom:.5rem;
}
.sp-row{display:flex;gap:.4rem;flex-wrap:wrap;align-items:center}
.sp-fs-row{align-items:center;gap:.75rem}
.sp-fs-disp{
  font-size:.82rem;color:var(--ink-2);min-width:3.5rem;text-align:center;
}
.sp-ctrl{
  background:var(--bg-2);border:1px solid var(--bg-3);border-radius:var(--r);
  color:var(--ink-2);padding:.35rem .8rem;cursor:pointer;font-family:var(--uf);
  transition:background .15s,color .15s;font-size:.85rem;
}
.sp-ctrl:hover{background:var(--bg-3);color:var(--ink)}
.sp-opt{
  padding:.4rem .9rem;border-radius:99px;border:1px solid var(--bg-3);
  background:var(--bg-2);color:var(--ink-2);font-size:.82rem;
  cursor:pointer;transition:all .15s;font-family:var(--uf);
}
.sp-opt:hover{border-color:var(--gold);color:var(--ink)}
.sp-opt.sp-active,.sp-bg.sp-active{
  background:var(--gold);color:#fff;border-color:var(--gold);
}
.sp-bg{
  padding:.4rem .9rem;border-radius:99px;border:1px solid var(--bg-3);
  font-size:.82rem;cursor:pointer;transition:all .15s;font-family:var(--uf);
}
.sp-bg:hover{border-color:var(--gold)}

/* ── TOC Drawer ── */
.toc-drawer{
  position:fixed;top:0;right:0;bottom:0;
  width:min(380px,92vw);
  background:var(--bg);border-left:1px solid var(--bg-3);
  z-index:80;display:flex;flex-direction:column;
  transform:translateX(100%);
  transition:transform .32s cubic-bezier(.4,0,.2,1);
}
.toc-drawer.panel-open{transform:translateX(0)}
.td-head{
  display:flex;align-items:flex-start;justify-content:space-between;
  gap:.75rem;padding:1rem 1rem .85rem;
  border-bottom:1px solid var(--bg-3);flex-shrink:0;
}
.td-book-title{font-size:.88rem;font-weight:600;line-height:1.3}
.td-ch-count{font-size:.72rem;color:var(--ink-3);margin-top:.2rem}
.td-close{
  background:none;border:none;cursor:pointer;color:var(--ink-3);
  padding:.2rem;border-radius:var(--r);flex-shrink:0;margin-top:.1rem;
  transition:color .15s,background .15s;
}
.td-close:hover{color:var(--ink);background:var(--bg-2)}
.td-list{list-style:none;overflow-y:auto;flex:1;padding:.35rem 0}
.td-list li{border-bottom:1px solid var(--bg-2)}
.td-list li a{
  display:flex;align-items:baseline;gap:.65rem;
  padding:.6rem 1rem;color:var(--ink-2);
  transition:background .12s,color .12s;text-decoration:none;
}
.td-list li a:hover{background:var(--bg-2);color:var(--ink);text-decoration:none}
.td-list li.td-cur a{
  color:var(--gold);font-weight:600;
  background:color-mix(in srgb,var(--gold) 8%,transparent);
}
.td-num{min-width:2.2rem;text-align:right;font-size:.7rem;color:var(--ink-3);flex-shrink:0}
.td-title{font-size:.84rem;line-height:1.35}

/* ── Admin link ── */
.admin-link{opacity:0;transition:opacity .25s}
.nav-wrap:hover .admin-link{opacity:1}

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