:root {
  --paper: #f6f0e4;
  --paper-deep: #ece2d0;
  --ink: #29231d;
  --muted: #756b5d;
  --line: #d8cbb6;
  --accent: #7c2f26;
  --accent-soft: #ead8d2;
  --sidebar: #251f1a;
  --sidebar-text: #eee5d7;
  --sidebar-muted: #b8aa98;
  --reader-size: 1.08rem;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: Georgia, "Times New Roman", serif; }
button, input { font: inherit; }
button { color: inherit; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

.app-shell { min-height: 100vh; }
.sidebar { position: fixed; inset: 0 auto 0 0; width: 340px; display: flex; flex-direction: column; background: var(--sidebar); color: var(--sidebar-text); border-right: 1px solid #42382f; z-index: 20; }
.brand { padding: 30px 28px 20px; border-bottom: 1px solid #42382f; }
.brand h1 { margin: 2px 0; font-size: 2rem; letter-spacing: .02em; font-weight: 600; }
.brand p { margin: 0; color: var(--sidebar-muted); }
.brand .eyebrow { color: #c99589; font: 700 .68rem/1.2 system-ui, sans-serif; letter-spacing: .16em; text-transform: uppercase; }
.search-box { display: flex; align-items: center; gap: 9px; margin: 18px 18px 8px; padding: 10px 11px; border: 1px solid #584b3f; background: #312923; border-radius: 8px; }
.search-box:focus-within { border-color: #b96a5c; box-shadow: 0 0 0 3px rgba(185,106,92,.18); }
.search-box svg { width: 18px; fill: none; stroke: var(--sidebar-muted); stroke-width: 1.8; }
.search-box input { min-width: 0; flex: 1; color: white; background: transparent; border: 0; outline: 0; }
.search-box input::placeholder { color: #a89988; }
.search-box kbd { color: #9f9181; border: 1px solid #594c40; border-radius: 4px; padding: 1px 6px; font: .72rem system-ui, sans-serif; }
.search-status { min-height: 22px; padding: 0 20px; color: var(--sidebar-muted); font: .76rem/1.4 system-ui, sans-serif; }
.toc { overflow-y: auto; padding: 6px 10px 20px; scrollbar-color: #68594b transparent; }
.toc-row { display: grid; grid-template-columns: 1fr 34px; align-items: start; }
.toc-row > a { display: grid; grid-template-columns: 28px 1fr; gap: 7px; align-items: start; padding: 9px 10px; color: var(--sidebar-muted); text-decoration: none; border-radius: 7px; font: .86rem/1.35 system-ui, sans-serif; }
.toc > a { display: grid; grid-template-columns: 28px 1fr; gap: 7px; align-items: start; padding: 9px 10px; color: var(--sidebar-muted); text-decoration: none; border-radius: 7px; font: .86rem/1.35 system-ui, sans-serif; }
.toc a:hover { color: white; background: #332b24; }
.toc a.active { color: white; background: #49332d; box-shadow: inset 3px 0 #b96a5c; }
.toc .num { color: #8f7e6b; font-variant-numeric: tabular-nums; }
.toc mark { color: inherit; background: #74483f; }
.toc-expand { width: 30px; height: 30px; margin-top: 4px; color: #c99589; background: transparent; border: 1px solid #55483d; border-radius: 6px; cursor: pointer; font: 400 1.05rem/1 system-ui, sans-serif; }
.toc-expand:hover { color: white; background: #49332d; }
.toc-canon-list { margin: 1px 6px 8px 38px; padding-left: 8px; border-left: 1px solid #59483c; }
.toc-canon-list[hidden] { display: none; }
.toc-canon-list a { display: block; padding: 6px 8px; color: #bbaa97; text-decoration: none; border-radius: 5px; font: .72rem/1.3 system-ui, sans-serif; }
.toc-canon-list a small { display: none; }
.toc-canon-list .toc-prolegomena { color: #d6a99f; font-weight: 600; }
.toc-loading { display: block; padding: 7px; color: #8f7e6b; font: .68rem system-ui, sans-serif; }
.search-result { border-bottom: 1px solid #3b322a; }
.search-result small { display: block; grid-column: 2; color: #9e8e7d; margin-top: 3px; }
.pdf-link { display: flex; justify-content: space-between; margin-top: auto; padding: 17px 22px; color: var(--sidebar-text); border-top: 1px solid #42382f; text-decoration: none; font: .78rem system-ui, sans-serif; }
.pdf-link span { color: var(--sidebar-muted); }

.reader { min-height: 100vh; margin-left: 340px; margin-right: 286px; }
.reader-bar { position: sticky; top: 0; height: 66px; display: flex; align-items: center; gap: 14px; padding: 0 26px; border-bottom: 1px solid rgba(124,95,61,.22); background: rgba(246,240,228,.94); backdrop-filter: blur(12px); z-index: 10; }
.reader-location { min-width: 0; flex: 1; }
.reader-location span { display: block; color: var(--accent); font: 700 .63rem/1.2 system-ui, sans-serif; letter-spacing: .13em; text-transform: uppercase; }
.reader-location strong { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font: 600 .92rem/1.3 system-ui, sans-serif; }
.icon-button, .text-button { width: 38px; height: 38px; display: grid; place-items: center; background: transparent; border: 1px solid var(--line); border-radius: 7px; cursor: pointer; }
.icon-button:hover, .text-button:hover { background: var(--paper-deep); }
.icon-button svg { width: 21px; fill: none; stroke: currentColor; stroke-width: 1.8; }
.menu-button { display: none; }
.outline-button { display: none; font-weight: 700; }
.text-button { font: 700 .72rem Georgia, serif; }
.text-button span { font-size: 1rem; }

.book-content { max-width: 820px; min-height: calc(100vh - 150px); margin: 0 auto; padding: 68px 56px 80px; outline: none; }
.chapter-heading { margin-bottom: 52px; text-align: center; }
.chapter-heading::after { content: "◆"; display: block; margin-top: 24px; color: var(--accent); font-size: .72rem; }
.chapter-kicker { color: var(--accent); font: 700 .7rem/1.3 system-ui, sans-serif; letter-spacing: .15em; text-transform: uppercase; }
.chapter-heading h2 { margin: 10px 0 8px; font-size: clamp(2rem, 4vw, 3.25rem); line-height: 1.08; font-weight: 500; }
.chapter-heading p { color: var(--muted); font-style: italic; }
.page-block { position: relative; margin: 0 0 38px; scroll-margin-top: 86px; }
.page-marker { position: absolute; right: calc(100% + 20px); top: .25rem; width: 38px; color: #9a8d7a; text-align: right; text-decoration: none; font: .68rem/1.2 system-ui, sans-serif; }
.page-marker:hover { color: var(--accent); }
.page-text { margin: 0; overflow-wrap: anywhere; font-size: var(--reader-size); line-height: 1.78; }
.page-text > p { margin: 0 0 1.08em; scroll-margin-top: 86px; }
.page-text > p:last-child { margin-bottom: 0; }
.page-text .struct-prolegomena { font-weight: 700; letter-spacing: .035em; }
.page-text .struct-canon::first-line, .page-text .struct-talcuire::first-line, .page-text .struct-simfonie::first-line { color: var(--accent); font-weight: 700; }
.page-text::first-letter { font-size: 1.35em; }
.page-block:target { background: rgba(231,212,184,.36); box-shadow: 0 0 0 12px rgba(231,212,184,.36); border-radius: 2px; }
.page-block mark { background: #f1c976; color: #271b0e; padding: 0 .08em; }
.contents-page-link { color: var(--accent); font-weight: 700; text-decoration-thickness: 1px; text-underline-offset: 3px; }
.contents-page-link:hover { background: var(--accent-soft); }

.structure-panel { position: fixed; inset: 0 0 0 auto; width: 286px; display: flex; flex-direction: column; background: #efe6d7; border-left: 1px solid var(--line); z-index: 12; }
.structure-heading { padding: 29px 22px 18px; border-bottom: 1px solid var(--line); }
.structure-heading p { margin: 0 0 5px; color: var(--accent); font: 700 .64rem/1.2 system-ui, sans-serif; letter-spacing: .13em; text-transform: uppercase; }
.structure-heading strong { font: 600 .9rem/1.35 system-ui, sans-serif; }
.structure-nav { overflow-y: auto; padding: 14px 12px 30px; font-family: system-ui, sans-serif; }
.structure-nav > a, .canon-main { display: block; color: var(--ink); text-decoration: none; border-radius: 7px; }
.structure-nav > a { padding: 10px; font-size: .85rem; }
.structure-nav a:hover { background: rgba(124,47,38,.09); }
.canon-group { margin-top: 5px; border-top: 1px solid var(--line); }
.canon-group summary { display: flex; align-items: center; gap: 7px; padding: 14px 10px 10px; color: var(--accent); cursor: pointer; list-style: none; font: 700 .76rem/1.2 system-ui, sans-serif; letter-spacing: .08em; text-transform: uppercase; }
.canon-group summary::-webkit-details-marker { display: none; }
.canon-group summary .count { margin-left: auto; color: var(--muted); }
.canon-group summary .plus { font-size: 1.25rem; font-weight: 400; transition: transform .18s ease; }
.canon-group[open] summary .plus { transform: rotate(45deg); }
.canon-list { display: grid; gap: 3px; }
.canon-item { padding: 8px 10px; border-radius: 7px; }
.canon-item:hover { background: rgba(124,47,38,.07); }
.canon-main b { display: block; font-size: .78rem; }
.canon-main small { display: -webkit-box; overflow: hidden; margin-top: 2px; color: var(--muted); font-size: .69rem; line-height: 1.35; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.canon-parts { display: flex; gap: 5px; margin-top: 6px; }
.canon-parts a { padding: 2px 5px; color: #796b5c; background: rgba(255,255,255,.45); border: 1px solid #d9cbb8; border-radius: 4px; font-size: .58rem; text-decoration: none; text-transform: uppercase; }
.loading, .error, .empty { padding: 80px 10px; color: var(--muted); text-align: center; font-style: italic; }
.chapter-nav { max-width: 820px; margin: 0 auto; padding: 24px 56px 60px; display: flex; justify-content: space-between; border-top: 1px solid var(--line); }
.chapter-nav button { padding: 11px 0; color: var(--accent); background: none; border: 0; cursor: pointer; }
.chapter-nav button:disabled { opacity: .3; cursor: default; }

.scrim { position: fixed; inset: 0; background: rgba(20,16,13,.56); z-index: 15; }
body.large-text { --reader-size: 1.25rem; }

@media (max-width: 1120px) {
  .reader { margin-right: 0; }
  .structure-panel { transform: translateX(102%); box-shadow: -18px 0 45px rgba(37,31,26,.18); transition: transform .22s ease; }
  body.outline-open .structure-panel { transform: translateX(0); }
  .outline-button { display: grid; }
}

@media (max-width: 850px) {
  .sidebar { transform: translateX(-102%); width: min(88vw, 340px); transition: transform .22s ease; }
  body.menu-open .sidebar { transform: translateX(0); }
  .reader { margin-left: 0; margin-right: 0; }
  .menu-button { display: grid; }
  .book-content { padding: 48px 28px 64px; }
  .page-marker { position: static; display: inline-block; width: auto; margin-bottom: 8px; }
  .chapter-nav { padding: 22px 28px 44px; }
}

@media (max-width: 520px) {
  .reader-bar { padding: 0 14px; }
  .book-content { padding: 38px 20px 54px; }
  .chapter-nav { padding-inline: 20px; }
  .chapter-nav button span { display: none; }
}

@media print {
  .sidebar, .structure-panel, .reader-bar, .chapter-nav { display: none; }
  .reader { margin: 0; }
  .book-content { max-width: none; padding: 0; }
}