:root{
  color-scheme:light;
  --bg:#f7efe6;--paper:#fffaf3;--ink:#28221f;--muted:#78695f;
  --accent:#8b3d3d;--accent-soft:#c98d94;--line:#dfd0c3;
  --shadow:0 18px 60px rgba(48,31,24,.16);--fs:19px;
  --nav-h:68px;
}
body[data-theme="dark"]{
  color-scheme:dark;
  --bg:#151312;--paper:#211d1b;--ink:#f3e9dc;--muted:#b8a99b;
  --accent:#f0a6aa;--accent-soft:#c98d94;--line:#3c312c;
  --shadow:0 18px 60px rgba(0,0,0,.42);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:
    radial-gradient(circle at 10% 0%,color-mix(in srgb,var(--accent-soft) 20%,transparent),transparent 34%),
    var(--bg);
  color:var(--ink);font-family:Georgia,"Times New Roman",serif;
  overflow-wrap:anywhere;
}
button,a{-webkit-tap-highlight-color:transparent}
button{font:inherit}
#progress{
  position:fixed;inset:0 auto auto 0;height:4px;width:0;
  background:linear-gradient(90deg,var(--accent),var(--accent-soft));z-index:100;
}
.topbar{
  position:fixed;top:0;left:0;right:0;z-index:60;
  min-height:var(--nav-h);display:flex;align-items:center;justify-content:space-between;
  padding:calc(10px + env(safe-area-inset-top)) max(16px,env(safe-area-inset-right)) 10px max(16px,env(safe-area-inset-left));
  background:color-mix(in srgb,var(--bg) 82%,transparent);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.brand{font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--accent)}
.toolbar{display:flex;align-items:center;gap:7px}
.iconBtn,.menuBtn,.btn{
  min-width:44px;min-height:44px;border:1px solid var(--line);
  border-radius:999px;background:var(--paper);color:var(--ink);
  display:inline-flex;align-items:center;justify-content:center;
  padding:10px 14px;cursor:pointer;text-decoration:none;
}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}
.menuBtn{display:none}
.hero{
  min-height:100svh;padding:
    calc(var(--nav-h) + 58px + env(safe-area-inset-top))
    max(6vw,env(safe-area-inset-right))
    54px max(6vw,env(safe-area-inset-left));
  display:flex;align-items:center;
}
.heroGrid{
  width:100%;max-width:1180px;margin:auto;
  display:grid;grid-template-columns:minmax(0,1.08fr) minmax(280px,.72fr);
  gap:clamp(28px,5vw,64px);align-items:center;
}
.eyebrow{text-transform:uppercase;letter-spacing:.18em;color:var(--accent);font-size:13px}
h1{font-size:clamp(58px,9vw,118px);line-height:.86;color:var(--accent);margin:0 0 24px}
.subtitle{font-size:clamp(21px,2.5vw,31px);line-height:1.25;max-width:720px}
.author{font-size:20px;color:var(--muted)}
.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:26px}
.cover{
  display:block;width:100%;aspect-ratio:3/4;object-fit:cover;
  border-radius:25px;box-shadow:var(--shadow);border:1px solid var(--line);
}
.layout{
  max-width:1240px;margin:auto;padding:
    0 max(24px,env(safe-area-inset-right))
    calc(86px + env(safe-area-inset-bottom))
    max(24px,env(safe-area-inset-left));
  display:grid;grid-template-columns:310px minmax(0,1fr);gap:34px;
}
.sidebar{
  position:sticky;top:calc(var(--nav-h) + 18px);align-self:start;
  max-height:calc(100svh - var(--nav-h) - 38px);overflow:auto;
  background:var(--paper);border:1px solid var(--line);
  border-radius:24px;padding:22px;box-shadow:var(--shadow);
}
.sidebar h2{margin:0 0 16px;color:var(--accent)}
.toc{margin:0;padding-left:20px}
.toc li{margin:.42rem 0}
.toc a{color:var(--ink);text-decoration:none;line-height:1.42}
.toc a.active{color:var(--accent);font-weight:700}
.reader{min-width:0}
.section{
  scroll-margin-top:calc(var(--nav-h) + 16px);
  background:var(--paper);border:1px solid var(--line);
  border-radius:30px;margin:0 0 34px;overflow:hidden;box-shadow:var(--shadow);
}
.sectionText{padding:clamp(30px,5vw,70px)}
.label{text-transform:uppercase;letter-spacing:.15em;color:var(--muted);font-size:13px}
.section h2{font-size:clamp(34px,5vw,62px);line-height:.96;color:var(--accent);margin:9px 0 20px}
.quote{
  font-style:italic;color:var(--muted);font-size:clamp(18px,2vw,21px);
  line-height:1.46;border-left:3px solid var(--accent-soft);
  padding-left:18px;margin:0 0 28px;
}
.section p{
  font-size:var(--fs);line-height:1.78;margin:0 0 1.22em;
  text-align:justify;hyphens:auto;
}
.illustration{
  display:block;width:100%;height:auto;max-height:84svh;
  object-fit:cover;border-top:1px solid var(--line);
}
#backTop{
  position:fixed;right:max(18px,env(safe-area-inset-right));
  bottom:calc(18px + env(safe-area-inset-bottom));z-index:40;
  width:50px;height:50px;padding:0;display:none;font-size:23px;
}
.drawerBackdrop{
  position:fixed;inset:0;background:rgba(0,0,0,.42);z-index:79;
  opacity:0;pointer-events:none;transition:opacity .2s ease;
}
.drawer{
  position:fixed;z-index:80;top:0;bottom:0;left:0;width:min(88vw,370px);
  padding:calc(18px + env(safe-area-inset-top)) 18px calc(18px + env(safe-area-inset-bottom));
  background:var(--paper);border-right:1px solid var(--line);
  transform:translateX(-104%);transition:transform .24s ease;
  overflow:auto;box-shadow:20px 0 70px rgba(0,0,0,.26);
}
.drawerHeader{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.drawer.open{transform:translateX(0)}
.drawerBackdrop.open{opacity:1;pointer-events:auto}
body.drawerOpen{overflow:hidden}
.drawer .toc a{display:block;padding:7px 0}
.mobileChapterBar{
  display:none;position:sticky;top:var(--nav-h);z-index:30;
  padding:8px 14px;background:color-mix(in srgb,var(--bg) 88%,transparent);
  backdrop-filter:blur(12px);border-bottom:1px solid var(--line);
  color:var(--muted);font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
@media (max-width:900px){
  .menuBtn{display:inline-flex}
  .desktopOnly{display:none}
  .hero{min-height:auto;padding-top:calc(var(--nav-h) + 38px + env(safe-area-inset-top))}
  .heroGrid{grid-template-columns:1fr;max-width:680px}
  .heroText{order:2}
  .cover{order:1;max-height:68svh;width:min(84vw,430px);margin:auto}
  h1{font-size:clamp(54px,18vw,88px)}
  .layout{display:block;padding-left:14px;padding-right:14px}
  .sidebar{display:none}
  .mobileChapterBar{display:block}
  .section{border-radius:22px;margin-bottom:22px}
  .sectionText{padding:30px 21px}
  .section p{text-align:left;line-height:1.72}
  .illustration{max-height:none}
}
@media (max-width:430px){
  :root{--nav-h:64px}
  .topbar{padding-left:12px;padding-right:12px}
  .brand{font-size:14px}
  .toolbar{gap:4px}
  .iconBtn,.menuBtn{padding:8px 10px}
  .hero{padding-left:18px;padding-right:18px}
  .actions{display:grid;grid-template-columns:1fr 1fr}
  .btn{width:100%;text-align:center}
  .layout{padding-left:10px;padding-right:10px}
  .sectionText{padding:27px 18px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
}