:root {
      --crimson: #9B1B30;
      --crimson-dark: #7A1526;
      --crimson-light: #C41E3A;
      --crimson-soft: #FDF2F4;
      --white: #FFFFFF;
      --off-white: #FAFAFA;
      --text: #1A1A1A;
      --text-muted: #5A5A5A;
      --border: #E8E0E2;
      --sidebar-width: 300px;
      --player-height: 0px;
      --dirbar-height: 48px;
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; scroll-padding-top: var(--dirbar-height); }
    body {
      font-family: 'Inter', system-ui, -apple-system, sans-serif;
      background: var(--white);
      color: var(--text);
      line-height: 1.65;
      display: flex;
      min-height: 100vh;
      padding-top: var(--dirbar-height);
    }
    #dirbar {
      position: fixed;
      top: 0; left: 0; right: 0;
      height: var(--dirbar-height);
      background: var(--white);
      border-bottom: 1px solid var(--border);
      display: flex;
      align-items: center;
      gap: 1.25rem;
      padding: 0 1.25rem;
      z-index: 300;
    }
    #dirbar nav {
      display: flex;
      align-items: center;
      gap: 1.25rem;
      font-size: 0.75rem;
      font-weight: 600;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }
    #dirbar a {
      color: var(--text-muted);
      text-decoration: none;
      padding: 0.2rem 0;
      border-bottom: 2px solid transparent;
    }
    #dirbar a:hover,
    #dirbar a[aria-current="page"] {
      color: var(--crimson);
      border-bottom-color: var(--crimson);
    }
    #sidebar {
      width: var(--sidebar-width);
      background: var(--white);
      border-right: 1px solid var(--border);
      position: fixed;
      top: var(--dirbar-height); left: 0; bottom: var(--player-height);
      overflow-y: auto;
      z-index: 100;
      display: flex;
      flex-direction: column;
    }
    .sidebar-header {
      padding: 1.5rem 1.25rem 1rem;
      border-bottom: 1px solid var(--border);
      background: var(--white);
      position: sticky; top: 0; z-index: 10;
    }
    .sidebar-header h1 {
      font-family: "EB Garamond", "Palatino Linotype", Palatino, Georgia, serif;
      font-size: 1.5rem; font-weight: 700;
      color: var(--crimson);
      letter-spacing: -0.02em; line-height: 1.2;
    }
    .sidebar-header p {
      font-size: 0.75rem; color: var(--text-muted);
      margin-top: 0.25rem; letter-spacing: 0.04em; text-transform: uppercase;
    }
    .search-box { margin: 0.75rem 1.25rem 0; position: relative; }
    .search-box input {
      width: 100%;
      padding: 0.5rem 0.75rem 0.5rem 2rem;
      border: 1px solid var(--border);
      border-radius: 6px;
      font-size: 0.875rem;
      background: var(--off-white);
      outline: none;
      transition: border-color 0.15s;
    }
    .search-box input:focus { border-color: var(--crimson); }
    .search-box::before {
      content: "⌕";
      position: absolute; left: 0.65rem; top: 50%;
      transform: translateY(-50%);
      color: var(--text-muted); font-size: 0.9rem;
    }
    #toc { flex: 1; padding: 0.75rem 0 1.5rem; overflow-y: auto; }
    .toc-section { margin-bottom: 0.25rem; }
    .toc-section-title {
      display: flex; align-items: center; justify-content: space-between;
      padding: 0.55rem 1.25rem;
      font-size: 0.7rem; font-weight: 600;
      letter-spacing: 0.06em; text-transform: uppercase;
      color: var(--crimson); cursor: pointer; user-select: none;
      transition: background 0.12s;
    }
    .toc-section-title:hover { background: var(--crimson-soft); }
    .toc-section-title .chevron { font-size: 0.65rem; transition: transform 0.2s; }
    .toc-section.open .chevron { transform: rotate(90deg); }
    .toc-links { display: none; padding-bottom: 0.35rem; }
    .toc-section.open .toc-links { display: block; }
    .toc-links a {
      display: block;
      padding: 0.35rem 1.25rem 0.35rem 1.75rem;
      font-size: 0.8125rem; color: var(--text);
      text-decoration: none; border-left: 2px solid transparent;
      transition: all 0.12s;
    }
    .toc-links a:hover {
      background: var(--crimson-soft); color: var(--crimson);
      border-left-color: var(--crimson);
    }
    .toc-links a.active {
      background: var(--crimson-soft); color: var(--crimson);
      border-left-color: var(--crimson); font-weight: 500;
    }
    #main {
      margin-left: var(--sidebar-width);
      flex: 1;
      padding: 2.5rem 3rem 6rem;
      max-width: 720px;
      font-family: "EB Garamond", "Palatino Linotype", Palatino, Georgia, serif;
      font-size: 1.15rem;
    }
    #main h1 {
      font-family: "EB Garamond", "Palatino Linotype", Palatino, Georgia, serif;
      font-size: 2.25rem; font-weight: 700;
      color: var(--crimson);
      margin: 2.5rem 0 1rem;
      line-height: 1.2; letter-spacing: -0.02em;
    }
    #main h1:first-child { margin-top: 0; }
    #main h2 {
      font-size: 1.35rem; font-weight: 600;
      color: var(--crimson-dark);
      margin: 1.75rem 0 0.75rem;
    }
    #main h3 {
      font-size: 1.1rem; font-weight: 600;
      color: var(--text-muted);
      margin: 1.25rem 0 0.5rem; font-style: italic;
    }
    #main p { margin-bottom: 0.15em; max-width: 38em; line-height: 1.45; }
    #main a {
      color: var(--crimson); text-decoration: none;
      border-bottom: 1px solid transparent; transition: border-color 0.15s;
    }
    #main a:hover { border-bottom-color: var(--crimson); }
    #main .stanza {
      margin-bottom: 1.75em;
      max-width: 38em;
      padding-bottom: 0.15em;
    }
    #main .stanza p,
    #main .stanza blockquote {
      margin: 0.08em 0;
      line-height: 1.42;
    }
    /* Keep the classic hanging indent look for the even (shorter) lines */
    #main .stanza blockquote {
      margin-left: 1.6em;
    }
    #main blockquote {
      margin-left: 1.75em; margin-right: 0; padding: 0;
      border: none; color: inherit; font-style: normal;
    }
    #main blockquote p { margin: 0; }
    .menu-toggle {
      display: none;
      background: var(--crimson); color: white; border: none;
      width: 36px; height: 36px; border-radius: 8px; font-size: 1.15rem;
      cursor: pointer; flex-shrink: 0;
      align-items: center; justify-content: center;
    }
    @media (max-width: 900px) {
      :root { --sidebar-width: 280px; }
      #main { padding: 1.5rem 1.25rem 6rem; font-size: 1.05rem; margin-left: 0; }
      .menu-toggle { display: flex; }
      #sidebar { transform: translateX(-100%); transition: transform 0.25s ease; bottom: 0; }
      #sidebar.open { transform: translateX(0); box-shadow: 8px 0 30px rgba(0,0,0,0.12); }
    }
    #sidebar::-webkit-scrollbar, #toc::-webkit-scrollbar { width: 6px; }
    #sidebar::-webkit-scrollbar-track, #toc::-webkit-scrollbar-track { background: transparent; }
    #sidebar::-webkit-scrollbar-thumb, #toc::-webkit-scrollbar-thumb { background: #ddd; border-radius: 3px; }
    #sidebar::-webkit-scrollbar-thumb:hover, #toc::-webkit-scrollbar-thumb:hover { background: #ccc; }
    .highlight-section { animation: softHighlight 1.5s ease; }
    @keyframes softHighlight {
      0% { background: var(--crimson-soft); }
      100% { background: transparent; }
    }

    #main .wcf-section { margin: 0 0 1.1rem; max-width: 38em; }
    #main .wcf-section .num { font-family: 'Inter', system-ui, sans-serif; font-size: 0.72rem; font-weight: 600; color: var(--crimson); margin-right: 0.4rem; vertical-align: 0.1em; }
    #main .wcf-section p { line-height: 1.55; margin-bottom: 0.3em; }
    #main .wcf-proofs { font-size: 0.9rem; color: var(--text-muted); margin-top: 0.2rem; }
    #main .is-placeholder { color: var(--text-muted); font-style: italic; }
    .placeholder-banner { font-family: 'Inter', system-ui, sans-serif; font-size: 0.85rem; background: var(--crimson-soft); color: var(--crimson-dark); border: 1px solid var(--border); border-radius: 8px; padding: 0.75rem 1rem; margin: 0 0 1.5rem; max-width: 38em; }
    #main h2.wcf-chapter { font-size: 1.6rem; margin-top: 2.5rem; }
    #main h2.wcf-chapter .kicker { display: block; font-family: 'Inter', system-ui, sans-serif; font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-muted); font-weight: 600; margin-bottom: 0.2rem; }

/* --- Textos de prueba (notas) y ventana emergente --- */
#main sup.fn { font-family: 'Inter', system-ui, sans-serif; font-size: 0.62em; font-weight: 600; line-height: 0; margin-left: 0.05em; }
#main sup.fn a { color: var(--crimson); border-bottom: none; }
#main .wcf-proofs { font-family: 'Inter', system-ui, sans-serif; font-size: 0.78rem; line-height: 1.55; color: var(--text-muted); margin: 0.35rem 0 0; padding: 0.45rem 0 0 0; border-top: 1px solid var(--border); list-style: none; max-width: 38em; }
#main .wcf-proofs li { margin: 0.1rem 0; }
#main .wcf-proofs li:target, #main .wcf-proofs li.flash { background: var(--crimson-soft); }
#main .wcf-proofs .nl { font-weight: 600; color: var(--crimson); margin-right: 0.3rem; }
#main .wcf-proofs .nl a { color: inherit; }
#main a.ref { color: var(--text); border-bottom: 1px dotted var(--crimson); cursor: help; }
#main a.ref:hover, #main a.ref:focus, #main a.ref.on { color: var(--crimson); border-bottom-style: solid; outline: none; }
#main .wcf-section ol.wcf-list, #main .wcf-section .indent { margin: 0.3em 0 0.3em 1.6em; }
#main .wcf-section ol.wcf-list li { margin-bottom: 0.3em; line-height: 1.55; }
#main .q-block { margin: 0 0 1.4rem; max-width: 38em; }
#main .q-block .q { font-weight: 600; color: var(--crimson-dark); margin-bottom: 0.25em; line-height: 1.4; }
#main .q-block .q .num, #main .q-block .a .lbl { font-family: 'Inter', system-ui, sans-serif; font-size: 0.72rem; font-weight: 600; color: var(--crimson); margin-right: 0.4rem; }
#main .q-block .a { line-height: 1.55; margin-bottom: 0.3em; }
#main .cat-divider { text-align: center; font-weight: 600; color: var(--crimson-dark); margin: 2.25rem 0 1.25rem; max-width: 38em; }
#main .cat-divider.left { text-align: left; font-weight: 400; }
#main .source-note { font-family: 'Inter', system-ui, sans-serif; font-size: 0.8rem; color: var(--text-muted); margin: 0 0 1.5rem; max-width: 38em; }

.vtip { position: absolute; z-index: 1000; max-width: min(26rem, calc(100vw - 1.5rem)); background: var(--white); color: var(--text); border: 1px solid var(--border); border-radius: 8px; box-shadow: 0 10px 30px rgba(0,0,0,0.14); font-family: "EB Garamond", "Palatino Linotype", Palatino, Georgia, serif; font-size: 1rem; line-height: 1.45; overflow: hidden; }
.vtip[hidden] { display: none; }
.vtip .vt-head { display: flex; justify-content: space-between; align-items: baseline; gap: 0.75rem; background: var(--crimson); color: #fff; padding: 0.4rem 0.75rem; font-family: 'Inter', system-ui, sans-serif; font-size: 0.78rem; font-weight: 600; }
.vtip .vt-head a { color: #fff; font-weight: 500; text-decoration: underline; white-space: nowrap; }
.vtip .vt-body { padding: 0.55rem 0.8rem 0.6rem; max-height: 16rem; overflow-y: auto; }
.vtip .vt-body p { margin: 0 0 0.25em; }
.vtip .vt-body .vn { font-family: 'Inter', system-ui, sans-serif; font-size: 0.65rem; font-weight: 600; color: var(--crimson); margin-right: 0.25em; vertical-align: 0.25em; }
.vtip .vt-body .ptitle { font-style: italic; color: var(--text-muted); }
.vtip .vt-foot { font-family: 'Inter', system-ui, sans-serif; font-size: 0.65rem; color: var(--text-muted); padding: 0 0.8rem 0.45rem; }

    @media (max-width: 640px) { #dirbar { gap: 0.6rem; padding: 0 0.75rem; } #dirbar nav { gap: 0.7rem; font-size: 0.62rem; letter-spacing: 0.04em; overflow-x: auto; white-space: nowrap; } }

/* --- Prefacio --- */
#main.prefacio h1.pref-h1 { font-size: 1.9rem; text-align: center; margin: 2.5rem 0 0.4rem; }
#main.prefacio h1.pref-h1:first-child { margin-top: 0; }
#main.prefacio .pref-sub { text-align: center; color: var(--text-muted); margin: 0 auto 1.75rem; }
#main.prefacio h2 { margin-top: 2rem; }
#main.prefacio p { line-height: 1.6; margin-bottom: 0.85em; text-align: justify; hyphens: auto; }
#main.prefacio blockquote { margin: 0.5em 0 1em 1.75em; padding-left: 0.9em; border-left: 3px solid var(--crimson-soft); }
#main.prefacio blockquote p { margin: 0; font-size: 1.05rem; }
#main.prefacio ul.pref-refs { list-style: none; padding: 0; margin: 0 0 1.5rem; max-width: 38em; }
#main.prefacio ul.pref-refs li { padding-left: 2em; text-indent: -2em; margin-bottom: 0.5em; font-size: 1rem; line-height: 1.45; }
#main.prefacio a { word-break: break-word; }
#main .prefacio-link { font-family: 'Inter', system-ui, sans-serif; font-size: 0.85rem; margin: 0 0 1.5rem; }

/* --- Otros documentos --- */
#main h1.doc-title { font-size: 1.85rem; text-align: center; }
#main .doc-body p { line-height: 1.6; margin-bottom: 0.7em; max-width: 38em; }
#main .doc-body p.center { text-align: center; }
#main .doc-body p.indent { margin-left: 1.75em; }
#main .doc-body p.doc-subtitle { font-style: italic; color: var(--text-muted); text-align: center; margin-bottom: 1.5rem; }
#main .doc-body h2.center, #main .doc-body h3.center { text-align: center; }
#main .doc-body h3 { font-style: normal; color: var(--crimson-dark); }
#main .doc-body .wcf-proofs { margin: -0.3rem 0 0.9rem; }
.toc-links a.sub { padding-left: 2.5rem; font-size: 0.78rem; }
#main ol.docs-list { font-size: 1.15rem; line-height: 1.5; padding-left: 1.5em; max-width: 38em; }
#main ol.docs-list li { margin: 0.45em 0; }
body.docs-index #main { margin-left: auto; margin-right: auto; }