/* ============================================================
   Lex Dignitatis — Petrol-Rose Monograph Register (PWA)
   FX-DOC-DIG-001 v1.0
   Palette:
     Hydra Teal  #01696F  — hairlines, seal marks
     Petrol Rose #A12C7B  — instrument code only
     InkSoft     #1B2A30  — body / headings
     Paper       #FBF7F0  — page surface
     Hair        #6F7B7E  — chrome
   ============================================================ */

:root {
  --teal:        #01696F;
  --rose:        #A12C7B;
  --ink:         #1B2A30;
  --paper:       #FBF7F0;
  --hair:        #6F7B7E;
  --rule:        #01696F;
  --hair-soft:   rgba(111,123,126,0.35);
  --ink-soft:    rgba(27,42,48,0.78);

  --serif: "Palatino Linotype", "Book Antiqua", Palatino, "URW Palladio L", "Liberation Serif", Georgia, serif;
  --sans:  "Helvetica Neue", "Arial", "Liberation Sans", system-ui, sans-serif;
  --mono:  "JetBrains Mono", "SF Mono", "Liberation Mono", Consolas, monospace;

  --measure: 38em;
  --col-pad: 1.6rem;
  --grad-fade: linear-gradient(180deg, transparent 0%, rgba(1,105,111,0.04) 100%);
}

[data-theme="dark"] {
  --teal:        #5FB5BA;
  --rose:        #D77BB7;
  --ink:         #F0EBE0;
  --paper:       #0E1518;
  --hair:        #A9B2B5;
  --rule:        #5FB5BA;
  --hair-soft:   rgba(169,178,181,0.30);
  --ink-soft:    rgba(240,235,224,0.78);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "kern", "liga", "onum";
  scroll-behavior: smooth;
}

/* ---------------- chrome ---------------- */
.chrome {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--paper);
  border-bottom: 0.5px solid var(--hair-soft);
  backdrop-filter: saturate(140%) blur(8px);
  -webkit-backdrop-filter: saturate(140%) blur(8px);
}
.chrome-foot {
  position: static;
  border-bottom: none;
  border-top: 0.5px solid var(--hair-soft);
  margin-top: 3rem;
  background: transparent;
}
.chrome-inner {
  max-width: 56rem;
  margin: 0 auto;
  padding: 0.55rem var(--col-pad);
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--sans);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--hair);
}
.chrome-code { font-weight: 600; color: var(--ink); }
.chrome-dot  { opacity: 0.5; }
.chrome-name { font-style: italic; text-transform: none; letter-spacing: 0; }
.theme-toggle {
  margin-left: auto;
  background: transparent;
  border: 0.5px solid var(--hair-soft);
  color: var(--ink);
  font-size: 1rem;
  width: 1.9rem;
  height: 1.9rem;
  border-radius: 999px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: border-color .2s, background .2s;
}
.theme-toggle:hover { border-color: var(--teal); background: rgba(1,105,111,0.04); }

/* ---------------- TOC ---------------- */
.toc {
  max-width: 56rem;
  margin: 0 auto;
  padding: 0.4rem var(--col-pad) 0;
}
.toc-toggle {
  font-family: var(--sans);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: transparent;
  border: none;
  color: var(--teal);
  padding: 0.4rem 0;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.toc-toggle .caret { transition: transform .2s; display: inline-block; }
.toc-toggle[aria-expanded="true"] .caret { transform: rotate(180deg); }
.toc-list {
  list-style: none;
  padding: 0.4rem 0 0.8rem;
  margin: 0;
  border-top: 0.5px solid var(--rule);
  font-family: var(--sans);
  font-size: 0.86rem;
  columns: 2;
  column-gap: 1.6rem;
}
.toc-list li { margin: 0.25rem 0; break-inside: avoid; }
.toc-list a { color: var(--ink-soft); text-decoration: none; }
.toc-list a:hover { color: var(--teal); }
@media (max-width: 640px) { .toc-list { columns: 1; } }

/* ---------------- page ---------------- */
.page {
  max-width: 38rem;
  margin: 0 auto;
  padding: 1.8rem var(--col-pad) 2rem;
}

/* ---------------- cover ---------------- */
.cover {
  padding: 2.6rem 0 1.6rem;
  border-bottom: 0.5px solid var(--hair-soft);
  margin-bottom: 2.4rem;
}
.cover-title {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(2.6rem, 8vw, 3.6rem);
  line-height: 1.05;
  margin: 0 0 0.6rem;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.cover-subtitle {
  font-family: var(--sans);
  font-size: 0.95rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ink);
  margin: 0 0 1.1rem;
}
.cover-rule {
  width: 60mm;
  max-width: 60%;
  height: 0;
  border: 0;
  border-top: 0.8pt solid var(--rule);
  margin: 1rem 0;
}
.cover-tag {
  font-style: italic;
  color: var(--hair);
  margin: 0 0 1.8rem;
  font-size: 0.95rem;
}
.cover-meta { margin: 1rem 0; }
.cover-meta dt {
  font-family: var(--sans);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--hair);
  margin-top: 0.9rem;
}
.cover-meta dd {
  margin: 0.15rem 0 0;
  font-size: 0.96rem;
}
.cover-meta dd.code { font-family: var(--sans); }
.cover-meta dd.code strong { color: var(--rose); letter-spacing: 0.04em; }
.cover-meta a { color: var(--teal); text-decoration: none; border-bottom: 0.5px dotted var(--teal); }
.cover-seal {
  font-style: italic;
  font-size: 0.85rem;
  color: var(--hair);
  margin: 1rem 0 0;
}

/* ---------------- section ---------------- */
.sec { margin: 2.4rem 0; }
.sec h2 {
  font-family: var(--serif);
  font-weight: 700;
  font-variant: small-caps;
  letter-spacing: 0.04em;
  font-size: 1.18rem;
  color: var(--ink);
  margin: 0 0 0.4rem;
  padding-bottom: 0.45rem;
  border-bottom: 0.3px solid var(--hair-soft);
}
.sec h2 em { font-variant: normal; }
.sec h2 .sec-num { color: var(--ink); margin-right: 0.35em; font-variant: normal; }
.sec h3 {
  font-family: var(--serif);
  font-weight: 700;
  font-variant: small-caps;
  letter-spacing: 0.03em;
  font-size: 1.0rem;
  color: var(--ink);
  margin: 1.5rem 0 0.4rem;
}
.sec h3 em { font-variant: normal; }

.sec p { margin: 0.7rem 0; }
.sec p em, .sec li em { font-style: italic; }
.sec strong { font-weight: 700; color: var(--ink); }
.sec ul { padding-left: 1.2rem; }
.sec ul li { margin: 0.35rem 0; }

/* Drop cap on §1 */
.dropcap {
  float: left;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 3.4rem;
  line-height: 0.86;
  padding: 0.05em 0.08em 0 0;
  margin-top: 0.05em;
  color: var(--ink);
}

/* Equation */
.eq {
  font-family: var(--serif);
  font-style: italic;
  text-align: center;
  margin: 0.8rem 0 !important;
  padding: 0.6rem 0;
  letter-spacing: 0.02em;
  color: var(--ink);
}

/* canonical passage — single hairlines top + bottom */
.canonbox {
  margin: 0.9rem 0;
  padding: 0.7rem 1rem;
  border-top: 0.45pt solid var(--rule);
  border-bottom: 0.45pt solid var(--rule);
  font-size: 0.96em;
}
.canonbox p:first-child { margin-top: 0; }
.canonbox p:last-child  { margin-bottom: 0; }

/* definition passage — double hairline top + single hairline bottom */
.defbox {
  margin: 1rem 0;
  padding: 0.9rem 1rem;
  border-top: 0.6pt solid var(--rule);
  box-shadow: 0 -3px 0 -2px var(--rule);   /* second top hairline */
  border-bottom: 0.45pt solid var(--rule);
  font-size: 0.96em;
}
.defbox-title {
  font-family: var(--serif);
  font-variant: small-caps;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--ink);
  margin: 0 0 0.4rem !important;
  font-size: 0.95rem;
}
.defbox p:last-child { margin-bottom: 0; }

/* Standing demand — distinguished */
.standing-demand {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  text-transform: none;
  color: var(--ink);
  background: rgba(1,105,111,0.06);
  border-left: 2.5pt solid var(--teal);
  padding: 0.7rem 0.9rem;
  margin: 0.8rem 0 !important;
}
[data-theme="dark"] .standing-demand { background: rgba(95,181,186,0.10); }

/* ---------------- matrix table ---------------- */
.table-wrap {
  overflow-x: auto;
  margin: 0.9rem 0;
  -webkit-overflow-scrolling: touch;
}
.matrix {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  min-width: 30rem;
}
.matrix thead th {
  text-align: left;
  font-family: var(--serif);
  font-variant: small-caps;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--ink);
  padding: 0.55rem 0.7rem;
  border-top: 0.8pt solid var(--ink);
  border-bottom: 0.45pt solid var(--ink);
  background: transparent;
}
.matrix tbody th {
  text-align: left;
  font-weight: 600;
  padding: 0.6rem 0.7rem;
  vertical-align: top;
  width: 32%;
  color: var(--ink);
}
.matrix tbody td {
  padding: 0.6rem 0.7rem;
  vertical-align: top;
  color: var(--ink);
  border-top: 0.3px solid var(--hair-soft);
}
.matrix tbody tr:last-child th,
.matrix tbody tr:last-child td {
  border-bottom: 0.8pt solid var(--ink);
}

/* ---------------- cross-refs ---------------- */
.crossrefs li { margin: 0.5rem 0; }

/* ---------------- colophon ---------------- */
.colophon {
  text-align: center;
  margin: 3rem auto 1rem;
  padding: 1.4rem 0;
}
.seal-rule {
  width: 40mm;
  max-width: 50%;
  border: 0;
  border-top: 0.6pt solid var(--rule);
  margin: 0.6rem auto;
}
.sealed-italic {
  font-style: italic;
  color: var(--ink);
  margin: 0.3rem 0;
}
.sealed-marks {
  font-family: var(--sans);
  font-size: 0.9rem;
  letter-spacing: 0.18em;
  color: var(--ink);
  margin: 0.4rem 0;
}
.sealed-meta {
  font-family: var(--sans);
  font-size: 0.78rem;
  color: var(--hair);
  letter-spacing: 0.03em;
  margin: 0.2rem 0;
}

/* ---------------- install hint ---------------- */
.install-hint {
  margin-top: 2.4rem;
  padding: 1rem;
  border: 0.5px dashed var(--hair-soft);
  font-family: var(--sans);
  font-size: 0.85rem;
  color: var(--hair);
  text-align: center;
}
.install-btn {
  font-family: var(--sans);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--teal);
  color: var(--paper);
  border: none;
  padding: 0.6rem 1.1rem;
  cursor: pointer;
  margin-right: 0.6rem;
  border-radius: 2px;
}
.install-btn:hover { filter: brightness(1.08); }

/* ---------------- print ---------------- */
@media print {
  .chrome, .toc, .install-hint, .theme-toggle { display: none !important; }
  body { background: white; color: black; font-size: 11pt; }
  .page { max-width: none; padding: 0; }
  .matrix { font-size: 9.5pt; }
  a { color: inherit; text-decoration: none; }
  .sec { page-break-inside: avoid; }
  h2, h3 { page-break-after: avoid; }
}

/* ---------------- focus ---------------- */
:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
  border-radius: 2px;
}