:root {
  --reader-font-scale: 1;
  --reader-bg: #06070b;
  --reader-panel: #0d1017;
  --reader-paper: #11151d;
  --reader-text: #edf0f4;
  --reader-muted: #9aa3ae;
  --reader-line: rgba(230, 186, 96, 0.22);
  --reader-accent: #e6ba60;
  --reader-accent-strong: #ffd780;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--reader-bg); }
body.book-reader {
  margin: 0;
  min-height: 100vh;
  color: var(--reader-text);
  background:
    radial-gradient(circle at 84% 3%, rgba(230, 186, 96, .12), transparent 30rem),
    linear-gradient(180deg, #05060a, var(--reader-bg));
  font-family: Inter, "Segoe UI", Arial, sans-serif;
  line-height: 1.6;
}
.book-reader[data-reader-site="wirth-nexara"] {
  --reader-bg: #05080b;
  --reader-panel: #091018;
  --reader-paper: #0d141b;
  --reader-accent: #d69436;
  --reader-accent-strong: #f2c66f;
  --reader-line: rgba(214, 148, 54, .24);
}
.reader-skip {
  position: fixed;
  z-index: 200;
  top: -80px;
  left: 14px;
  padding: 10px 14px;
  color: #111;
  background: var(--reader-accent-strong);
  border-radius: 6px;
  font-weight: 800;
}
.reader-skip:focus { top: 12px; }
.reader-topbar {
  position: sticky;
  z-index: 100;
  top: 0;
  display: grid;
  min-height: 72px;
  grid-template-columns: minmax(210px, 1fr) auto minmax(210px, 1fr);
  align-items: center;
  gap: 18px;
  padding: 10px clamp(16px, 3vw, 46px);
  border-bottom: 1px solid var(--reader-line);
  background: rgba(6, 7, 11, .92);
  backdrop-filter: blur(18px);
}
.book-reader[data-reader-site="wirth-nexara"] .reader-topbar { background: rgba(5, 8, 11, .94); }
.reader-progress-track {
  position: absolute;
  inset: auto 0 -1px;
  height: 3px;
  overflow: hidden;
  background: rgba(255,255,255,.04);
}
.reader-progress {
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: left;
  background: linear-gradient(90deg, var(--reader-accent), var(--reader-accent-strong));
}
.reader-brand,
.reader-back,
.reader-action,
.reader-support {
  color: inherit;
  text-decoration: none;
}
.reader-brand {
  display: grid;
  width: fit-content;
  gap: 1px;
  font-weight: 900;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.reader-brand small {
  color: var(--reader-muted);
  font-size: .58rem;
  font-weight: 700;
  letter-spacing: .14em;
}
.reader-top-title {
  min-width: 0;
  text-align: center;
}
.reader-top-title strong,
.reader-top-title span {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.reader-top-title strong { font-family: Georgia, serif; font-size: .96rem; font-weight: 500; }
.reader-top-title span { color: var(--reader-muted); font-size: .66rem; }
.reader-tools {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 7px;
}
.reader-tool,
.reader-toc-toggle {
  min-width: 40px;
  min-height: 40px;
  padding: 0 11px;
  border: 1px solid var(--reader-line);
  border-radius: 5px;
  color: var(--reader-text);
  background: transparent;
  cursor: pointer;
  font-weight: 750;
}
.reader-tool:hover,
.reader-tool:focus-visible,
.reader-toc-toggle:hover,
.reader-toc-toggle:focus-visible {
  outline: 2px solid transparent;
  border-color: var(--reader-accent);
  color: var(--reader-accent-strong);
}
.reader-toc-toggle { display: none; }
.reader-stage {
  display: grid;
  width: min(100% - 32px, 1580px);
  margin: 0 auto;
  grid-template-columns: 310px minmax(0, 1fr);
  gap: clamp(30px, 5vw, 80px);
}
.reader-sidebar {
  position: sticky;
  top: 92px;
  align-self: start;
  height: calc(100vh - 112px);
  padding: 24px 0 18px;
  overflow: hidden;
}
.reader-sidebar-head {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr) auto;
  align-items: center;
  gap: 15px;
  margin-bottom: 18px;
}
.reader-sidebar-head img {
  width: 76px;
  aspect-ratio: 1;
  object-fit: cover;
  border: 1px solid var(--reader-line);
  border-radius: 8px;
}
.reader-sidebar-head strong { display: block; font-family: Georgia, serif; line-height: 1.2; }
.reader-sidebar-head span { display: block; margin-top: 5px; color: var(--reader-accent-strong); font-size: .62rem; text-transform: uppercase; letter-spacing: .08em; }
.reader-toc-close,
.reader-toc-scrim { display: none; }
.reader-toc {
  height: calc(100% - 126px);
  padding-right: 8px;
  overflow: auto;
  scrollbar-color: var(--reader-accent) transparent;
}
.reader-toc-link {
  display: block;
  padding: 8px 10px;
  border-left: 1px solid var(--reader-line);
  color: var(--reader-muted);
  text-decoration: none;
  font-size: .72rem;
  line-height: 1.35;
}
.reader-toc-link.level-2 { padding-left: 20px; }
.reader-toc-link:hover,
.reader-toc-link:focus-visible,
.reader-toc-link[aria-current="location"] {
  color: var(--reader-text);
  border-left-color: var(--reader-accent-strong);
  background: rgba(230, 186, 96, .07);
  outline: none;
}
.reader-main {
  min-width: 0;
  padding: clamp(28px, 5vw, 76px) 0 90px;
}
.reader-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 230px;
  gap: clamp(28px, 5vw, 70px);
  align-items: center;
  min-height: min(660px, calc(100vh - 100px));
  padding-bottom: clamp(46px, 7vw, 100px);
  border-bottom: 1px solid var(--reader-line);
}
.reader-eyebrow {
  color: var(--reader-accent-strong);
  font-size: .7rem;
  font-weight: 850;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.reader-intro h1 {
  max-width: 930px;
  margin: 14px 0 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(3rem, 7vw, 7.2rem);
  font-weight: 400;
  letter-spacing: -.055em;
  line-height: .92;
}
.reader-subtitle {
  max-width: 760px;
  margin: 24px 0 0;
  color: #c2c8d0;
  font-size: clamp(1rem, 1.4vw, 1.24rem);
}
.reader-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}
.reader-meta span {
  padding: 7px 9px;
  border: 1px solid var(--reader-line);
  color: var(--reader-accent-strong);
  font-size: .64rem;
  font-weight: 800;
  letter-spacing: .06em;
  text-transform: uppercase;
}
.reader-note {
  max-width: 780px;
  margin: 24px 0 0;
  padding: 18px 20px;
  border-left: 2px solid var(--reader-accent);
  color: var(--reader-muted);
  background: rgba(230, 186, 96, .055);
}
.reader-intro-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}
.reader-support {
  flex-basis: 100%;
  width: fit-content;
  color: var(--reader-muted);
  font-size: .68rem;
  font-weight: 750;
  letter-spacing: .04em;
  text-decoration: underline;
  text-decoration-color: var(--reader-line);
  text-underline-offset: 4px;
}
.reader-support:hover,
.reader-support:focus-visible {
  color: var(--reader-accent-strong);
  outline: none;
  text-decoration-color: var(--reader-accent);
}
.reader-action,
.reader-back {
  display: inline-flex;
  min-height: 45px;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  border: 1px solid var(--reader-line);
  border-radius: 4px;
  font-size: .68rem;
  font-weight: 850;
  letter-spacing: .06em;
  text-transform: uppercase;
}
.reader-action {
  color: #15100a;
  border-color: var(--reader-accent);
  background: var(--reader-accent-strong);
}
.reader-back:hover,
.reader-back:focus-visible,
.reader-action:hover,
.reader-action:focus-visible {
  outline: 2px solid var(--reader-accent);
  outline-offset: 3px;
}
.reader-hero-cover {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border: 1px solid var(--reader-line);
  border-radius: 12px;
  box-shadow: 0 30px 80px rgba(0,0,0,.38);
}
.reader-content {
  width: min(100%, 82ch);
  margin: 0 auto;
  padding-top: clamp(50px, 8vw, 110px);
}
.reader-loading,
.reader-error {
  padding: 30px;
  color: var(--reader-muted);
  border: 1px solid var(--reader-line);
}
.reader-error p { margin: 0 0 18px; }
.reader-retry {
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid var(--reader-accent);
  border-radius: 5px;
  color: #15100a;
  background: var(--reader-accent-strong);
  cursor: pointer;
  font: inherit;
  font-weight: 800;
}
.reader-retry:focus-visible {
  outline: 2px solid var(--reader-accent);
  outline-offset: 3px;
}
.reader-page {
  position: relative;
  padding: clamp(28px, 5vw, 66px) clamp(12px, 4vw, 54px);
  border-bottom: 1px solid var(--reader-line);
  scroll-margin-top: 92px;
  content-visibility: auto;
  contain-intrinsic-size: 900px;
}
.reader-page:first-child { border-top: 1px solid var(--reader-line); }
.reader-page-number {
  display: block;
  margin-bottom: 28px;
  color: var(--reader-accent);
  font-size: .62rem;
  font-weight: 850;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.reader-page p,
.reader-page li,
.reader-page blockquote {
  font-family: Georgia, "Times New Roman", serif;
  font-size: calc(1.15rem * var(--reader-font-scale));
  line-height: 1.86;
}
.reader-page p { margin: 0 0 1.28em; }
.reader-page h2 {
  margin: 0 0 1.35em;
  font-family: Georgia, "Times New Roman", serif;
  font-size: calc(clamp(2rem, 4vw, 3.7rem) * var(--reader-font-scale));
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: -.035em;
}
.reader-page h3 {
  margin: 2.1em 0 .7em;
  color: var(--reader-accent-strong);
  font-family: Georgia, "Times New Roman", serif;
  font-size: calc(1.42rem * var(--reader-font-scale));
  font-weight: 500;
}
.reader-page blockquote {
  margin: 1.8em 0 2.2em;
  padding: .3em 0 .3em 1.4em;
  border-left: 2px solid var(--reader-accent);
  color: var(--reader-accent-strong);
  font-style: italic;
}
.reader-list { margin: 0 0 1.5em; padding-left: 1.35em; }
.reader-inline-cover {
  display: block;
  width: min(100%, 520px);
  margin: 0 auto;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 10px;
}
.reader-rights {
  width: min(100%, 82ch);
  margin: 48px auto 0;
  padding: 20px clamp(12px, 4vw, 54px);
  color: var(--reader-muted);
  font-size: .74rem;
  border-left: 2px solid var(--reader-accent);
}
.reader-light {
  --reader-bg: #f1ede4;
  --reader-panel: #e8e1d4;
  --reader-paper: #fffdf8;
  --reader-text: #1a1814;
  --reader-muted: #625d55;
  --reader-line: rgba(111, 76, 18, .24);
}
.reader-light.book-reader { background: #f1ede4; }
.reader-light .reader-topbar { background: rgba(255, 253, 248, .94); }
.reader-light .reader-subtitle { color: #48443d; }
.reader-light .reader-toc-link:hover,
.reader-light .reader-toc-link:focus-visible,
.reader-light .reader-toc-link[aria-current="location"] { background: rgba(126, 83, 13, .08); }
@media (max-width: 980px) {
  .reader-topbar { grid-template-columns: minmax(0, 1fr) auto; }
  .reader-top-title { display: none; }
  .reader-toc-toggle { display: inline-flex; align-items: center; }
  .reader-stage { display: block; width: min(100% - 24px, 900px); }
  .reader-sidebar {
    position: fixed;
    z-index: 90;
    top: 72px;
    right: 0;
    bottom: 0;
    width: min(88vw, 360px);
    height: auto;
    padding: 22px;
    border-left: 1px solid var(--reader-line);
    background: var(--reader-panel);
    transform: translateX(105%);
    transition: transform .22s ease;
  }
  .reader-sidebar.is-open { transform: translateX(0); }
  .reader-toc-close {
    display: inline-flex;
    min-width: 44px;
    min-height: 44px;
    align-items: center;
    justify-content: center;
    padding: 0 10px;
    border: 1px solid var(--reader-line);
    border-radius: 5px;
    color: var(--reader-text);
    background: transparent;
    cursor: pointer;
    font: inherit;
    font-size: .7rem;
    font-weight: 800;
  }
  .reader-toc-close:hover,
  .reader-toc-close:focus-visible {
    border-color: var(--reader-accent);
    color: var(--reader-accent-strong);
    outline: 2px solid transparent;
  }
  .reader-toc-scrim {
    position: fixed;
    z-index: 80;
    inset: 72px 0 0;
    display: block;
    width: 100%;
    border: 0;
    background: rgba(0, 0, 0, .62);
    opacity: 0;
    pointer-events: none;
    transition: opacity .22s ease;
  }
  .reader-toc-open { overflow: hidden; }
  .reader-toc-open .reader-toc-scrim {
    opacity: 1;
    pointer-events: auto;
  }
  .reader-intro { min-height: auto; padding-top: 30px; }
}
@media (max-width: 680px) {
  .reader-topbar { min-height: 64px; gap: 6px; padding-inline: 12px; }
  .reader-brand {
    min-width: 0;
    overflow: hidden;
    font-size: .72rem;
    letter-spacing: .035em;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .reader-brand small { display: none; }
  .reader-tools { gap: 4px; }
  .reader-tool,
  .reader-toc-toggle { min-width: 44px; min-height: 44px; padding-inline: 9px; }
  .reader-stage { width: 100%; }
  .reader-main { padding-top: 0; }
  .reader-intro {
    grid-template-columns: 1fr;
    padding: 34px 18px 56px;
  }
  .reader-intro h1 { font-size: clamp(2.7rem, 15vw, 4.7rem); }
  .reader-hero-cover { width: min(72vw, 280px); order: -1; }
  .reader-content { padding-top: 0; }
  .reader-page { padding-inline: 20px; }
  .reader-page p,
  .reader-page li,
  .reader-page blockquote { font-size: calc(1.05rem * var(--reader-font-scale)); line-height: 1.78; }
  .reader-rights { margin-inline: 20px; width: auto; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reader-sidebar { transition: none; }
  .reader-toc-scrim { transition: none; }
}
@media print {
  .reader-topbar,
  .reader-sidebar,
  .reader-intro-actions { display: none !important; }
  body.book-reader { color: #111; background: #fff; }
  .reader-stage { display: block; width: 100%; }
  .reader-main { padding: 0; }
  .reader-intro { min-height: auto; }
  .reader-page { break-inside: avoid; border-color: #ccc; }
}