:root{--reader-scale:1;--ease:cubic-bezier(.19,1,.22,1);--mono:'IBM Plex Mono',ui-monospace,monospace;}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
html{scroll-behavior:smooth;}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto;}}
body{background:var(--bg);color:var(--ink);font-family:'Literata',Georgia,serif;
  line-height:1.78;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  transition:background .3s ease,color .3s ease;}
[data-theme="light"]{--bg:#F9F8F5;--ink:#333333;--head:#2C2620;--muted:#8A8278;--accent:#7A6118;--gold:#C9A84C;--note-bg:#FBF7EA;--note-ink:#4A4438;--rule:#E7E3D8;--chrome:#FDFCF9;}
[data-theme="sepia"]{--bg:#F4ECD8;--ink:#5B4636;--head:#43331F;--muted:#8A795E;--accent:#8A6914;--gold:#A6841E;--note-bg:#EFE3C6;--note-ink:#5B4636;--rule:#DCCFAF;--chrome:#F7F0DE;}
[data-theme="dark"]{--bg:#0A0E1A;--ink:#9A8E73;--head:#C9BFA0;--muted:#6E6552;--accent:#C9A84C;--gold:#D4BA6A;--note-bg:#11172A;--note-ink:#B7AC8C;--rule:#1E2540;--chrome:#0C111F;}
[data-theme="black"]{--bg:#0F0F0F;--ink:#8C8C8C;--head:#B9B9B9;--muted:#5E5E5E;--accent:#A99A66;--gold:#B9A972;--note-bg:#161616;--note-ink:#9A9A9A;--rule:#242424;--chrome:#0B0B0B;}

::selection{background:var(--gold);color:var(--chrome);}
:focus-visible{outline:1.5px solid var(--gold);outline-offset:3px;border-radius:2px;}
a{color:var(--accent);text-decoration:none;}
.wrap{max-width:680px;margin:0 auto;padding:0 24px;}

/* Reading progress */
#rprog{position:fixed;top:0;left:0;right:0;height:2px;z-index:60;background:var(--gold);
  transform-origin:0 50%;transform:scaleX(0);}

/* Header */
.site-header{position:sticky;top:0;z-index:30;background:var(--chrome);
  border-bottom:1px solid var(--rule);}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:60px;}
.wordmark{font-family:'Fraunces',serif;font-weight:460;font-size:17px;
  letter-spacing:.28em;color:var(--head);text-transform:uppercase;display:flex;align-items:center;gap:10px;}
.wordmark i{font-style:normal;color:var(--gold);font-size:10px;transform:translateY(-1px);}
.get-app{font:500 10px/1 var(--mono);letter-spacing:.14em;text-transform:uppercase;
  color:var(--chrome);background:var(--accent);border-radius:2px;padding:11px 16px;
  transition:opacity .25s;}
.get-app:hover{opacity:.85;}

/* Hero / book landing */
.hero{max-width:780px;margin:0 auto;padding:54px 24px 10px;display:flex;gap:42px;align-items:flex-start;}
.hero-cover img{width:172px;height:auto;border:1px solid var(--rule);border-radius:3px;display:block;}
.hero-meta{flex:1;min-width:0;}
.free-line{font:600 9.5px/1.5 var(--mono);letter-spacing:.3em;
  text-transform:uppercase;color:var(--accent);margin:0 0 14px;}
.book-title{font-family:'Fraunces',serif;font-optical-sizing:auto;font-weight:440;
  font-size:clamp(38px,6vw,54px);line-height:1.0;margin:0 0 14px;color:var(--head);letter-spacing:-.02em;}
.byline{font:400 10.5px/1.6 var(--mono);letter-spacing:.12em;
  text-transform:uppercase;color:var(--muted);margin:0 0 18px;}
.description{font-size:16.5px;line-height:1.75;color:var(--ink);margin:0 0 20px;}
.readmeta{font:400 10.5px/1.6 var(--mono);color:var(--muted);
  letter-spacing:.05em;text-transform:uppercase;margin:0 0 26px;}
.begin-row{display:flex;align-items:center;gap:18px;flex-wrap:wrap;}
.btn-begin{display:inline-block;font:600 10.5px/1 var(--mono);
  letter-spacing:.14em;text-transform:uppercase;
  color:var(--chrome);background:var(--accent);border-radius:2px;padding:17px 28px;
  transition:opacity .25s;}
.btn-begin:hover{opacity:.86;}
.restart{font:400 10px/1 var(--mono);letter-spacing:.08em;color:var(--muted);
  text-transform:uppercase;border-bottom:1px solid var(--rule);padding-bottom:2px;}
.restart:hover{color:var(--accent);}
.free-note{font-family:'Inter',sans-serif;font-size:11.5px;color:var(--muted);margin:16px 0 0;}

/* Contents — register table */
.toc{max-width:680px;margin:40px auto 8px;padding:0 24px;}
.toc-head{display:flex;align-items:baseline;justify-content:space-between;
  border-bottom:1px solid var(--gold);padding-bottom:9px;margin-bottom:2px;}
.toc-cap{font:600 9.5px/1 var(--mono);letter-spacing:.3em;
  text-transform:uppercase;color:var(--accent);}
.toc-meta{font:400 9.5px/1 var(--mono);letter-spacing:.08em;color:var(--muted);text-transform:uppercase;}
.trow{display:flex;align-items:baseline;gap:16px;border-bottom:1px solid var(--rule);
  padding:11px 2px;transition:background .2s;}
.trow:hover{background:var(--note-bg);}
.tno{font:500 10px/1 var(--mono);color:var(--gold);letter-spacing:.06em;min-width:26px;}
.tt{flex:1;font-family:'Fraunces',serif;font-weight:420;font-size:15.5px;
  color:var(--head);line-height:1.4;}
.trow:hover .tt{color:var(--accent);}
.tmin{font:400 9px/1 var(--mono);color:var(--muted);letter-spacing:.08em;text-transform:uppercase;}
.trow.locked .tt{color:var(--muted);}
.trow.locked .tmin{color:var(--gold);}

/* Controls bar (chapter pages) */
.controls{position:sticky;top:60px;z-index:20;background:var(--chrome);
  border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);}
.controls .wrap{display:flex;align-items:center;gap:16px;min-height:50px;flex-wrap:wrap;
  padding-top:6px;padding-bottom:6px;}
.ctl-crumb{font:500 9.5px/1.4 var(--mono);letter-spacing:.12em;text-transform:uppercase;
  color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:34vw;}
.ctl-crumb:hover{color:var(--accent);}
.ctl-group{display:flex;align-items:center;gap:8px;}
.ctl-label{font:600 9px/1 var(--mono);letter-spacing:.18em;
  text-transform:uppercase;color:var(--muted);}
.swatch{width:19px;height:19px;border-radius:50%;border:1px solid var(--rule);cursor:pointer;padding:0;}
.swatch[aria-pressed="true"]{outline:1.5px solid var(--gold);outline-offset:2.5px;}
.sw-light{background:#F9F8F5;}.sw-sepia{background:#F4ECD8;}.sw-dark{background:#0A0E1A;}.sw-black{background:#0F0F0F;}
.ctl-btn{font:500 11px/1 var(--mono);color:var(--ink);background:none;
  border:1px solid var(--rule);border-radius:2px;padding:7px 10px;cursor:pointer;
  transition:border-color .25s,color .25s;}
.ctl-btn:hover{border-color:var(--gold);}
.ctl-btn[aria-pressed="true"]{color:var(--accent);border-color:var(--gold);}
.ctl-pos{margin-left:auto;font:400 9.5px/1 var(--mono);letter-spacing:.1em;color:var(--muted);}

/* Reader */
.reader{max-width:680px;margin:0 auto;padding:46px 24px 8px;
  font-size:calc(19px * var(--reader-scale));}
.chapter{scroll-margin-top:130px;}
.ch-kick{font:500 9px/1.6 var(--mono);letter-spacing:.3em;text-transform:uppercase;
  color:var(--muted);text-align:center;margin:0 0 10px;}
.chapter-title{font-family:'Fraunces',serif;font-optical-sizing:auto;font-weight:450;
  font-size:calc(31px * var(--reader-scale));color:var(--head);text-align:center;
  margin:0 0 30px;letter-spacing:-.012em;line-height:1.15;}
.ch-orn{display:block;width:40px;height:1px;background:var(--gold);opacity:.55;margin:0 auto 22px;}
.para{margin:0 0 1.3em;}
.vn{color:var(--gold);font-weight:500;font-size:.8em;}

/* Commentary — collapsed bars (tap header to expand, like the app) */
.cbar{background:var(--note-bg);border-left:2px solid var(--gold);margin:1.3em 0 1.6em;}
.cbar-header{display:flex;align-items:center;gap:10px;padding:12px 17px;cursor:pointer;
  user-select:none;-webkit-user-select:none;}
.cbar-glyph{color:var(--gold);font-size:13px;line-height:1;flex:none;}
.cbar-label{flex:1;font:600 10px/1 var(--mono);
  letter-spacing:.18em;text-transform:uppercase;color:var(--accent);}
.cbar-chevron{color:var(--accent);font-size:17px;line-height:1;transition:transform .25s var(--ease);}
.cbar.expanded .cbar-chevron{transform:rotate(90deg);}
.cbar-body{display:none;padding:0 19px 17px 17px;}
.cbar.expanded .cbar-body{display:block;}
.cm-note{font-family:'Inter',sans-serif;font-size:calc(14.5px * var(--reader-scale));
  line-height:1.72;color:var(--note-ink);}
.cm-note + .cm-note{margin-top:1em;padding-top:1em;border-top:1px solid var(--rule);}
.cbar-source{display:block;margin-top:9px;font-size:.85em;font-style:italic;color:var(--muted);}
.notes-off .cbar{display:none;}

.cap-banner{max-width:680px;margin:26px auto 0;font:400 11px/1.7 var(--mono);
  color:var(--muted);background:var(--note-bg);border:1px solid var(--rule);
  border-radius:2px;padding:14px 20px;text-align:center;letter-spacing:.04em;}

/* Chapter prev/next — register cells */
.chnav{max-width:680px;margin:34px auto 0;padding:0 24px;display:grid;
  grid-template-columns:1fr 1fr;}
.chnav-cell{display:flex;flex-direction:column;gap:7px;padding:20px 4px 22px;
  border-top:1px solid var(--rule);min-width:0;}
.chnav-cell.next{text-align:right;border-left:1px solid var(--rule);padding-left:18px;}
.chnav-cell.prev{padding-right:18px;}
.chnav .lbl{font:600 9.5px/1 var(--mono);letter-spacing:.16em;text-transform:uppercase;
  color:var(--gold);}
.chnav .ct{font-family:'Fraunces',serif;font-weight:430;font-size:16px;color:var(--head);
  line-height:1.35;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;}
a.chnav-cell:hover .ct{color:var(--accent);}
.chnav-cell.end .ct{color:var(--muted);}

/* Conversion blocks */
.convert{max-width:680px;margin:0 auto;padding:26px 24px 54px;}
.cv-kick{font:600 9.5px/1 var(--mono);letter-spacing:.3em;text-transform:uppercase;
  color:var(--accent);margin:0 0 10px;border-top:1px solid var(--gold);padding-top:16px;
  display:inline-block;}
.cv-line{font-family:'Inter',sans-serif;font-size:13.5px;line-height:1.8;color:var(--muted);
  margin:0 0 18px;max-width:520px;}
.cv-row{display:flex;align-items:center;gap:26px;}
.btn-store{display:inline-block;font:600 10.5px/1 var(--mono);
  letter-spacing:.14em;text-transform:uppercase;
  color:var(--chrome);background:var(--accent);border-radius:2px;padding:17px 30px;transition:opacity .25s;}
.btn-store:hover{opacity:.86;}
.btn-store.sm{padding:14px 22px;font-size:10px;}

.qr{display:none;}
@media(hover:hover) and (min-width:900px){
  .qr{display:flex;flex-direction:column;align-items:center;gap:6px;}
  .qr img{display:block;background:#fff;padding:7px;border-radius:2px;border:1px solid var(--rule);}
  .qr-cap{font:400 8.5px/1 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--muted);}
}

/* Final CTA */
.cta{max-width:680px;margin:28px auto 0;padding:0 24px 70px;text-align:center;}
.cta-rule{height:1px;background:var(--gold);opacity:.6;margin-bottom:28px;}
.cta-kick{font:600 9.5px/1 var(--mono);letter-spacing:.3em;text-transform:uppercase;
  color:var(--accent);margin:0 0 18px;}
.cta h3{font-family:'Fraunces',serif;font-weight:440;font-size:clamp(26px,4.5vw,34px);
  color:var(--head);margin:0 0 16px;letter-spacing:-.015em;line-height:1.15;}
.cta-body{font-family:'Inter',sans-serif;font-size:15px;line-height:1.75;color:var(--muted);
  max-width:520px;margin:0 auto 28px;}
.cta-row{display:flex;align-items:center;justify-content:center;gap:26px;}
.cta-fine{font:400 9.5px/1.8 var(--mono);letter-spacing:.1em;text-transform:uppercase;
  color:var(--muted);margin:22px 0 0;}
.cta-fine a{color:var(--muted);border-bottom:1px solid var(--rule);}
.cta-fine a:hover{color:var(--accent);}

/* Footer */
.site-footer{border-top:1px solid var(--rule);background:var(--chrome);
  padding:30px 24px;margin-top:0;}
.site-footer .wrap{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;}
.footer-mark{font-family:'Fraunces',serif;letter-spacing:.24em;text-transform:uppercase;
  color:var(--muted);font-size:13px;font-weight:460;}
.footer-links a{font:400 10px/2 var(--mono);letter-spacing:.06em;text-transform:uppercase;
  color:var(--muted);margin-left:16px;transition:color .25s;}
.footer-links a:hover{color:var(--accent);}

@media (max-width:640px){
  .hero{flex-direction:column;align-items:center;text-align:center;padding-top:36px;gap:24px;}
  .hero-cover img{width:144px;}
  .begin-row{justify-content:center;}
  .controls .wrap{min-height:0;padding-top:9px;padding-bottom:9px;gap:12px;}
  .ctl-crumb{max-width:100%;order:-1;flex-basis:100%;}
  .ctl-pos{margin-left:auto;}
  .chnav{grid-template-columns:1fr;}
  .chnav-cell.next{text-align:left;border-left:none;padding-left:4px;}
  .chnav-cell.prev{padding-right:4px;}
  .cta-row{flex-direction:column;gap:16px;}
}