/* =========================================================================
   Manual do webMARS — folha de estilo editorial
   Composição de livro técnico: coluna de texto medida, notas na margem,
   figuras numeradas, listagens anotadas. Sem dependências externas.
   ========================================================================= */

/* --- 1. Tokens ---------------------------------------------------------- */

:root {
  color-scheme: light dark;

  --ff-text: "Sitka Text", "Iowan Old Style", Charter, Cambria, "Palatino Linotype", Palatino, "Book Antiqua", ui-serif, Georgia, serif;
  --ff-display: "Sitka Heading", "Iowan Old Style", Charter, Cambria, "Palatino Linotype", ui-serif, Georgia, serif;
  --ff-ui: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --ff-mono: "Cascadia Mono", "Cascadia Code", ui-monospace, "SF Mono", "Segoe UI Mono", Consolas, monospace;

  --measure: 33rem;
  --gutter: 2.75rem;
  --margin-col: 14.5rem;
  --hang: 3.25rem;
  --nav-w: 17.5rem;
  --head-h: 46px;

  --paper: #fdfcf9;
  --paper-sunk: #f4f1ea;
  --paper-raised: #ffffff;
  --ink: #1b1a17;
  --ink-muted: #55514a;
  --ink-faint: #706a61;
  --rule: #ddd8cd;
  --rule-strong: #beb7a9;
  --accent: #9c3a24;
  --accent-quiet: #b8654e;
  --flag: #9c3a24;

  --tok-directive: #7a5a12;
  --tok-register: #8f3f2c;
  --tok-string: #3f6152;
  --tok-comment: #706a61;
  --tok-punct: #706a61;

  --focus: #185f86;
  --marker: #f0dca6;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --paper: #191713;
  --paper-sunk: #221f1a;
  --paper-raised: #201d18;
  --ink: #eae4d8;
  --ink-muted: #a9a193;
  --ink-faint: #8e877a;
  --rule: #34302a;
  --rule-strong: #4d483f;
  --accent: #e28268;
  --accent-quiet: #c5735c;
  --flag: #e28268;

  --tok-directive: #d8b169;
  --tok-register: #e59079;
  --tok-string: #90bba5;
  --tok-comment: #8e877a;
  --tok-punct: #8e877a;

  --focus: #6db4dd;
  --marker: #5e4a1c;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --paper: #191713;
    --paper-sunk: #221f1a;
    --paper-raised: #201d18;
    --ink: #eae4d8;
    --ink-muted: #a9a193;
    --ink-faint: #8e877a;
    --rule: #34302a;
    --rule-strong: #4d483f;
    --accent: #e28268;
    --accent-quiet: #c5735c;
    --flag: #e28268;

    --tok-directive: #d8b169;
    --tok-register: #e59079;
    --tok-string: #90bba5;
    --tok-comment: #8e877a;
    --tok-punct: #8e877a;

    --focus: #6db4dd;
    --marker: #5e4a1c;
  }
}

/* --- 2. Base ------------------------------------------------------------ */

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--head-h) + 2.5rem);
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--ff-text);
  font-size: 1.0625rem;
  line-height: 1.62;
  font-synthesis-weight: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: var(--accent); text-decoration-thickness: from-font; text-underline-offset: 0.16em; }
a:hover { color: var(--ink); }
img { max-width: 100%; }
::selection { background: var(--marker); color: var(--ink); }

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
  border-radius: 1px;
}

.sr-only {
  position: absolute !important;
  width: 1px; height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip-link {
  position: fixed;
  z-index: 200;
  left: 0.75rem; top: 0.5rem;
  transform: translateY(-200%);
  padding: 0.5rem 0.9rem;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--ff-ui);
  font-size: 0.82rem;
  text-decoration: none;
}
.skip-link:focus { transform: none; color: var(--paper); }

/* --- 3. Cabeça corrente (running head) ---------------------------------- */

.running-head {
  position: fixed;
  z-index: 60;
  inset: 0 0 auto 0;
  height: var(--head-h);
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0 1.1rem;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  border-bottom: 1px solid var(--rule);
  backdrop-filter: blur(10px);
  font-family: var(--ff-ui);
}

.head-brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.55rem;
  min-width: calc(var(--nav-w) - 1.1rem);
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
}
.head-brand:hover { color: var(--ink); }
.head-brand .brand-title {
  font-family: var(--ff-display);
  font-size: 0.98rem;
  letter-spacing: 0.005em;
}
.head-brand .brand-edition {
  color: var(--ink-faint);
  font-size: 0.66rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.running-recto {
  flex: 1;
  min-width: 0;
  margin: 0;
  overflow: hidden;
  color: var(--ink-muted);
  font-size: 0.72rem;
  letter-spacing: 0.07em;
  text-overflow: ellipsis;
  text-transform: uppercase;
  white-space: nowrap;
}
.running-recto b {
  color: var(--ink);
  font-weight: 600;
}
.running-recto .recto-sep { color: var(--ink-faint); padding: 0 0.45rem; }

.head-tools { display: flex; align-items: center; gap: 0.4rem; }

.head-button {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  height: 30px;
  padding: 0 0.6rem;
  color: var(--ink-muted);
  background: none;
  border: 1px solid transparent;
  font-size: 0.76rem;
  text-decoration: none;
}
.head-button:hover { color: var(--ink); border-color: var(--rule); }
.head-button kbd { margin-left: 0.15rem; }
.head-button .glyph { font-size: 0.95rem; line-height: 1; }
.head-button.icon-only { width: 30px; padding: 0; justify-content: center; }

.head-app-link {
  border-color: var(--rule-strong);
  color: var(--ink);
}

.reading-rule {
  position: absolute;
  inset: auto 0 -1px 0;
  height: 1px;
  background: none;
}
.reading-rule span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--flag);
  transition: width 0.12s linear;
}

.nav-toggle {
  display: none;
  width: 30px; height: 30px;
  align-items: center;
  justify-content: center;
  background: none;
  border: 1px solid var(--rule);
  color: var(--ink);
}

/* --- 4. Índice lateral -------------------------------------------------- */

.book-nav {
  position: fixed;
  z-index: 40;
  left: 0; top: var(--head-h); bottom: 0;
  width: var(--nav-w);
  padding: 1.9rem 1.4rem 3rem 1.5rem;
  overflow-y: auto;
  overscroll-behavior: contain;
  background: var(--paper);
  border-right: 1px solid var(--rule);
  scrollbar-width: thin;
  font-family: var(--ff-ui);
}

.nav-heading {
  margin: 0 0 1.4rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--rule);
  color: var(--ink-faint);
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.nav-part { margin-bottom: 1.55rem; }
.nav-part-label {
  display: flex;
  align-items: baseline;
  gap: 0.45rem;
  margin: 0 0 0.5rem;
  color: var(--ink-faint);
  font-size: 0.66rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}
.nav-part-label .part-numeral {
  color: var(--ink-faint);
  font-variant-numeric: tabular-nums;
}
.nav-part ul { margin: 0; padding: 0; list-style: none; }

.nav-chapter {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  padding: 0.28rem 0.4rem 0.28rem 0;
  color: var(--ink-muted);
  font-size: 0.845rem;
  line-height: 1.36;
  text-decoration: none;
}
.nav-chapter:hover { color: var(--ink); }
.nav-chapter .nav-numeral {
  flex: 0 0 1.35rem;
  color: var(--ink-faint);
  font-size: 0.72rem;
  font-variant-numeric: tabular-nums;
  text-align: right;
}
.nav-chapter[aria-current="page"] {
  color: var(--ink);
  font-weight: 600;
}
.nav-chapter[aria-current="page"] .nav-numeral { color: var(--flag); }

.nav-sections {
  margin: 0.15rem 0 0.7rem;
  padding: 0 0 0 1.95rem;
  list-style: none;
  border-left: 1px solid var(--rule);
}
.nav-sections a {
  display: block;
  padding: 0.19rem 0;
  color: var(--ink-muted);
  font-size: 0.775rem;
  line-height: 1.34;
  text-decoration: none;
}
.nav-sections a:hover { color: var(--ink); }
.nav-sections a.current {
  color: var(--flag);
  box-shadow: -1px 0 var(--flag);
  margin-left: -1px;
  padding-left: 1px;
}

.nav-appendix {
  margin-top: 1.9rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  display: grid;
  gap: 0.32rem;
}
.nav-appendix a {
  color: var(--ink-faint);
  font-size: 0.775rem;
  text-decoration: none;
}
.nav-appendix a:hover { color: var(--ink); }

.nav-scrim {
  position: fixed;
  z-index: 35;
  inset: var(--head-h) 0 0 0;
  background: color-mix(in srgb, var(--ink) 38%, transparent);
}

/* --- 5. Grelha da página ------------------------------------------------ */

.book-main {
  margin-left: var(--nav-w);
  padding: calc(var(--head-h) + 3.4rem) 2rem 6rem calc(2rem + var(--hang));
}

.page {
  position: relative;
  display: grid;
  grid-template-columns:
    [text-start] var(--measure) [text-end gutter-start] var(--gutter)
    [gutter-end margin-start] var(--margin-col) [margin-end];
  align-items: start;
  width: fit-content;
  margin: 0 auto;
}
.page > * { grid-column: text; min-width: 0; }

/* --- 6. Folha de rosto e índice geral ----------------------------------- */

.title-page {
  grid-column: text;
  margin-bottom: 3.4rem;
  padding-bottom: 2.2rem;
  border-bottom: 1px solid var(--rule);
}
.title-page .imprint {
  margin: 0 0 2.6rem;
  color: var(--ink-faint);
  font-family: var(--ff-ui);
  font-size: 0.66rem;
  letter-spacing: 0.19em;
  text-transform: uppercase;
}
.title-page h1 {
  margin: 0;
  font-family: var(--ff-display);
  font-size: clamp(2.4rem, 6vw, 3.5rem);
  font-weight: 400;
  letter-spacing: -0.012em;
  line-height: 1.05;
}
.title-page .title-sub {
  max-width: 26rem;
  margin: 1rem 0 0;
  color: var(--ink-muted);
  font-size: 1.15rem;
  font-style: italic;
  line-height: 1.42;
}
.title-page .title-rule {
  width: 100%;
  height: 3px;
  margin: 2.1rem 0 1.3rem;
  border: 0;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}
.imprint-lines {
  display: grid;
  gap: 0.2rem;
  color: var(--ink-muted);
  font-family: var(--ff-ui);
  font-size: 0.76rem;
}
.imprint-lines b { color: var(--ink); font-variant-numeric: tabular-nums; font-weight: 600; }

.contents-block { grid-column: text; margin-bottom: 3.6rem; }
.contents-block > h2 {
  margin: 0 0 1.4rem;
  color: var(--ink-faint);
  font-family: var(--ff-ui);
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.19em;
  text-transform: uppercase;
}
.contents-part { margin-bottom: 1.7rem; }
.contents-part-label {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin: 0 0 0.5rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--rule);
  font-family: var(--ff-display);
  font-size: 0.95rem;
}
.contents-part-label .part-numeral {
  color: var(--ink-faint);
  font-family: var(--ff-ui);
  font-size: 0.64rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.toc-entry {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.26rem 0;
  color: var(--ink);
  text-decoration: none;
}
.toc-entry:hover { color: var(--accent); }
.toc-entry:hover .toc-title { text-decoration: underline; text-underline-offset: 0.15em; }
.toc-entry .toc-numeral {
  flex: 0 0 1.6rem;
  color: var(--ink-faint);
  font-family: var(--ff-ui);
  font-size: 0.74rem;
  font-variant-numeric: tabular-nums;
  text-align: right;
}
.toc-entry .toc-title { flex: 0 1 auto; }
.toc-leader {
  flex: 1 1 1rem;
  min-width: 1.2rem;
  align-self: center;
  height: 0;
  border-bottom: 1px dotted var(--rule-strong);
  transform: translateY(0.05em);
}
.toc-entry .toc-folio {
  flex: 0 0 auto;
  color: var(--ink-faint);
  font-family: var(--ff-ui);
  font-size: 0.7rem;
  font-variant-numeric: tabular-nums;
}

/* --- 7. Abertura de capítulo -------------------------------------------- */

.chapter-opener {
  grid-column: text;
  margin-bottom: 3.2rem;
}
.chapter-label {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  margin: 0 0 1.5rem;
  color: var(--ink-faint);
  font-family: var(--ff-ui);
  font-size: 0.68rem;
  letter-spacing: 0.19em;
  text-transform: uppercase;
}
.chapter-label .label-rule {
  flex: 1;
  height: 0;
  border-bottom: 1px solid var(--rule);
  transform: translateY(-0.25em);
}
.chapter-label .chapter-numeral {
  color: var(--flag);
  font-variant-numeric: tabular-nums;
}

.chapter-opener h1 {
  margin: 0;
  font-family: var(--ff-display);
  font-size: clamp(1.95rem, 4.4vw, 2.65rem);
  font-weight: 400;
  letter-spacing: -0.012em;
  line-height: 1.1;
  text-wrap: balance;
}
.standfirst {
  margin: 1.05rem 0 0;
  color: var(--ink-muted);
  font-size: 1.115rem;
  font-style: italic;
  line-height: 1.5;
  text-wrap: pretty;
}
.opener-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.3rem;
  margin-top: 1.35rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--rule);
  color: var(--ink-faint);
  font-family: var(--ff-ui);
  font-size: 0.7rem;
}
.opener-meta b { color: var(--ink-muted); font-weight: 600; }

.chapter-contents {
  margin-top: 1.6rem;
  padding: 0.9rem 0 0;
  border-top: 1px solid var(--rule);
}
.chapter-contents > p {
  margin: 0 0 0.5rem;
  color: var(--ink-faint);
  font-family: var(--ff-ui);
  font-size: 0.64rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.chapter-contents .toc-entry { padding: 0.19rem 0; font-size: 0.94rem; }

/* --- 8. Prosa ----------------------------------------------------------- */

.manual-section {
  grid-column: text;
  margin: 0 0 2.9rem;
}

.manual-section > h2 {
  position: relative;
  margin: 0 0 0.95rem;
  font-family: var(--ff-display);
  font-size: 1.42rem;
  font-weight: 400;
  letter-spacing: -0.008em;
  line-height: 1.22;
  text-wrap: balance;
}
.manual-section > h2 a {
  color: inherit;
  text-decoration: none;
}
.manual-section > h2 a:hover { color: var(--accent); }
.section-numeral {
  position: absolute;
  right: calc(100% + 0.85rem);
  top: 0.34em;
  color: var(--ink-faint);
  font-family: var(--ff-ui);
  font-size: 0.68rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.prose h3 {
  margin: 1.85rem 0 0.55rem;
  font-family: var(--ff-display);
  font-size: 1.045rem;
  font-weight: 600;
  letter-spacing: 0;
  line-height: 1.35;
}
.prose h4 {
  margin: 1.5rem 0 0.45rem;
  font-family: var(--ff-ui);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.prose p {
  margin: 0 0 0.95rem;
  hyphens: auto;
  hyphenate-limit-chars: 7 4 3;
  text-align: justify;
  text-wrap: pretty;
}
.prose p:last-child { margin-bottom: 0; }

.prose > p:first-child::first-letter { font-size: inherit; }
.drop-cap::first-letter {
  float: left;
  margin: 0.02em 0.1em 0 0;
  padding-right: 0.02em;
  color: var(--ink);
  font-family: var(--ff-display);
  font-size: 3.25em;
  font-weight: 400;
  line-height: 0.84;
}

.prose ul, .prose ol {
  margin: 0 0 1.05rem;
  padding-left: 1.25rem;
}
.prose li { margin: 0.3rem 0; }
.prose li::marker { color: var(--ink-faint); }
.prose em { font-style: italic; }
.prose strong { font-weight: 600; }
.prose hr {
  width: 4.5rem;
  margin: 2.2rem auto;
  border: 0;
  border-top: 1px solid var(--rule-strong);
}

/* --- 9. Notas na margem ------------------------------------------------- */

.callout {
  float: right;
  clear: right;
  width: var(--margin-col);
  margin: 0.35rem calc(-1 * (var(--gutter) + var(--margin-col))) 1.15rem var(--gutter);
  padding: 0 0 0 0.75rem;
  border-left: 2px solid var(--rule-strong);
  color: var(--ink-muted);
  font-family: var(--ff-ui);
  font-size: 0.755rem;
  line-height: 1.5;
  text-align: left;
}
.callout p { margin: 0 0 0.55rem; hyphens: none; text-align: left; }
.callout p:last-child { margin-bottom: 0; }
.callout code { font-size: 0.9em; }
.callout-title {
  display: block;
  margin-bottom: 0.3rem;
  color: var(--ink);
  font-size: 0.63rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}
.callout-title::before {
  content: attr(data-note) " ";
  color: var(--ink-faint);
  font-variant-numeric: tabular-nums;
}
.callout.note { border-left-color: var(--rule-strong); }
.callout.tip { border-left-color: #4f8068; }
.callout.warning { border-left-color: #b08320; }
.callout.danger { border-left-color: var(--accent); }
.callout.compat { border-left-color: #6f5f9b; }
.callout.tip .callout-title { color: #3d6b52; }
.callout.warning .callout-title { color: #8a6410; }
.callout.danger .callout-title { color: var(--accent); }
.callout.compat .callout-title { color: #5d4e88; }

:root[data-theme="dark"] .callout.tip .callout-title { color: #8dc0a4; }
:root[data-theme="dark"] .callout.warning .callout-title { color: #d5aa55; }
:root[data-theme="dark"] .callout.compat .callout-title { color: #a996d8; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .callout.tip .callout-title { color: #8dc0a4; }
  :root:not([data-theme="light"]) .callout.warning .callout-title { color: #d5aa55; }
  :root:not([data-theme="light"]) .callout.compat .callout-title { color: #a996d8; }
}

/* --- 10. Figuras -------------------------------------------------------- */

.screenshot {
  display: grid;
  grid-template-columns: var(--measure) var(--gutter) var(--margin-col);
  width: calc(var(--measure) + var(--gutter) + var(--margin-col));
  margin: 1.9rem 0 2.2rem;
}
.screenshot-frame {
  grid-column: 1;
  padding: 0;
  background: var(--paper-raised);
  border: 1px solid var(--rule-strong);
}
.screenshot-frame img {
  display: block;
  width: 100%;
  height: auto;
}
.screenshot figcaption {
  grid-column: 3;
  align-self: end;
  color: var(--ink-muted);
  font-family: var(--ff-ui);
  font-size: 0.735rem;
  line-height: 1.45;
}
.figure-tag {
  display: block;
  color: var(--ink);
  font-size: 0.63rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* --- 11. Tabelas -------------------------------------------------------- */

.table-wrap {
  width: calc(var(--measure) + var(--gutter) + var(--margin-col));
  margin: 1.6rem 0 2rem;
  overflow-x: auto;
  border-top: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
}
.table-caption {
  display: block;
  margin: 1.7rem 0 -1.2rem;
  color: var(--ink);
  font-family: var(--ff-ui);
  font-size: 0.63rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--ff-ui);
  font-size: 0.79rem;
  line-height: 1.45;
}
th, td {
  padding: 0.5rem 0.9rem 0.5rem 0;
  text-align: left;
  vertical-align: baseline;
}
th {
  border-bottom: 1px solid var(--ink);
  color: var(--ink);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  white-space: nowrap;
}
td { border-bottom: 1px solid var(--rule); }
tbody tr:last-child td { border-bottom: 0; }
td:last-child, th:last-child { padding-right: 0; }
td code { font-size: 0.86em; }

/* --- 12. Listagens ------------------------------------------------------ */

code, kbd, samp {
  font-family: var(--ff-mono);
  font-size: 0.855em;
  font-variant-ligatures: none;
}
/* Em composição de livro, o código em linha muda de tipo — não ganha caixa.
   Evita as folgas antes da pontuação que uma caixa com padding produz. */
:not(pre) > code {
  padding: 0;
  color: var(--ink);
  font-size: 0.87em;
  hyphens: none;
  word-break: break-word;
}
.prose :not(pre) > code { font-weight: 500; }
kbd {
  padding: 0.1em 0.36em;
  color: var(--ink-muted);
  background: var(--paper-raised);
  border: 1px solid var(--rule-strong);
  border-bottom-width: 2px;
  border-radius: 3px;
  font-size: 0.72em;
  white-space: nowrap;
}

.listing {
  position: relative;
  margin: 1.6rem 0 1.9rem;
}
.listing-head {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  margin-bottom: 0.4rem;
}
.listing-tag {
  color: var(--ink);
  font-family: var(--ff-ui);
  font-size: 0.63rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.listing-lang {
  flex: 1;
  color: var(--ink-faint);
  font-family: var(--ff-ui);
  font-size: 0.7rem;
}
.listing-copy {
  padding: 0.12rem 0.4rem;
  color: var(--ink-faint);
  background: none;
  border: 1px solid transparent;
  font-family: var(--ff-ui);
  font-size: 0.68rem;
  opacity: 0;
  transition: opacity 0.12s ease;
}
.listing:hover .listing-copy,
.listing-copy:focus-visible { opacity: 1; }
.listing-copy:hover { color: var(--ink); border-color: var(--rule); }

.code-label { display: none; }

pre {
  margin: 0;
  padding: 0.85rem 1rem 0.9rem;
  overflow-x: auto;
  background: var(--paper-sunk);
  border-left: 2px solid var(--rule-strong);
  color: var(--ink);
  font-size: 0.9rem;
  line-height: 1.62;
  tab-size: 4;
}
pre code { padding: 0; background: none; }

.tok-comment { color: var(--tok-comment); font-style: italic; }
.tok-directive { color: var(--tok-directive); font-weight: 600; }
.tok-string { color: var(--tok-string); }
.tok-label { color: var(--ink); font-weight: 700; }
.tok-mnemonic { color: var(--ink); font-weight: 600; }
.tok-register { color: var(--tok-register); }
.tok-punct { color: var(--tok-punct); }

.glossed {
  display: inline;
  padding: 0;
  margin: 0;
  background: none;
  border: 0;
  border-bottom: 1px dotted currentColor;
  color: inherit;
  font: inherit;
  text-align: inherit;
  cursor: help;
}
.glossed:hover { background: var(--marker); }
.glossed[aria-expanded="true"] { background: var(--marker); }

/* --- 13. Glosa marginal ------------------------------------------------- */

.gloss {
  position: absolute;
  z-index: 20;
  width: var(--margin-col);
  padding: 0.55rem 0 0.6rem 0.75rem;
  background: var(--paper);
  border-left: 2px solid var(--flag);
  box-shadow: 0 0 0 6px var(--paper);
  font-family: var(--ff-ui);
  font-size: 0.745rem;
  line-height: 1.45;
}
.gloss dfn {
  display: block;
  margin-bottom: 0.1rem;
  color: var(--ink);
  font-family: var(--ff-mono);
  font-size: 0.85rem;
  font-style: normal;
  font-weight: 600;
}
.gloss .gloss-kind {
  display: block;
  margin-bottom: 0.4rem;
  color: var(--ink-faint);
  font-size: 0.61rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}
.gloss p { margin: 0 0 0.4rem; color: var(--ink-muted); }
.gloss p:last-child { margin-bottom: 0; }
.gloss .gloss-form {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--ink);
  font-family: var(--ff-mono);
  font-size: 0.72rem;
}
.gloss-dismiss {
  position: absolute;
  top: 0.3rem; right: 0;
  width: 1.2rem; height: 1.2rem;
  padding: 0;
  color: var(--ink-faint);
  background: none;
  border: 0;
  font-size: 0.85rem;
  line-height: 1;
}
.gloss-dismiss:hover { color: var(--ink); }

/* --- 14. Componentes editoriais ---------------------------------------- */

/* Sumário de percursos (era grelha de cartões) */
.card-grid {
  display: grid;
  gap: 0;
  margin: 1.4rem 0 2rem;
  border-top: 1px solid var(--rule);
  counter-reset: routecard;
}
.manual-card {
  display: grid;
  grid-template-columns: 2.2rem 1fr;
  gap: 0 0.9rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--rule);
  color: var(--ink);
  text-decoration: none;
}
.manual-card:hover { color: var(--ink); background: var(--paper-sunk); }
.manual-card .card-icon {
  grid-row: span 2;
  padding-top: 0.16em;
  color: var(--ink-faint);
  font-family: var(--ff-mono);
  font-size: 0.76rem;
  text-align: right;
}
.manual-card strong {
  font-family: var(--ff-display);
  font-size: 1.045rem;
  font-weight: 600;
}
.manual-card span:not(.card-icon) {
  color: var(--ink-muted);
  font-size: 0.865rem;
  line-height: 1.45;
}
.manual-card:hover strong { color: var(--accent); }

/* Números da edição (era faixa de estatísticas) */
.stat-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0 2.4rem;
  margin: 1.5rem 0 1.8rem;
  padding: 0.9rem 0;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--rule);
}
.stat { display: flex; align-items: baseline; gap: 0.45rem; }
.stat strong {
  color: var(--ink);
  font-family: var(--ff-display);
  font-size: 1.3rem;
  font-weight: 400;
  font-variant-numeric: tabular-nums;
}
.stat span {
  color: var(--ink-faint);
  font-family: var(--ff-ui);
  font-size: 0.71rem;
}

/* Sequência de fases (era faixa de passos) */
.workflow {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 0.7rem;
  margin: 1.4rem 0 1.7rem;
  padding: 0.8rem 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  font-family: var(--ff-ui);
}
.workflow-step { display: flex; align-items: baseline; gap: 0.4rem; }
.workflow-step small {
  color: var(--ink-faint);
  font-size: 0.63rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}
.workflow-step strong { font-size: 0.85rem; font-weight: 600; }
.workflow-arrow { color: var(--ink-faint); }

/* Procedimentos numerados */
.steps {
  margin: 1.3rem 0 1.6rem;
  padding: 0 !important;
  list-style: none;
  counter-reset: manual-step;
}
.steps > li {
  position: relative;
  margin: 0;
  padding: 0.1rem 0 0.85rem 0 !important;
  counter-increment: manual-step;
}
.steps > li::before {
  content: counter(manual-step);
  position: absolute;
  right: calc(100% + 0.85rem);
  top: 0.22em;
  color: var(--flag);
  font-family: var(--ff-ui);
  font-size: 0.7rem;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
}
.steps > li:last-child { padding-bottom: 0 !important; }

/* Fichas de ferramenta */
.tool-index {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.85rem;
  width: calc(var(--measure) + var(--gutter) + var(--margin-col));
  margin: 1.2rem 0 2rem;
  padding: 0.8rem 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.tool-index a {
  color: var(--ink-muted);
  font-family: var(--ff-ui);
  font-size: 0.755rem;
  text-decoration: none;
}
.tool-index a:hover { color: var(--accent); text-decoration: underline; }

.tool-spec {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 1.6rem;
  margin: 1.3rem 0 1.6rem;
  padding: 0.9rem 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  font-size: 0.94rem;
}
.tool-spec h3 { margin-top: 0; }
.tool-spec p { text-align: left; hyphens: none; }

/* --- 15. Referência pesquisável ---------------------------------------- */

#reference-app { grid-column: text; }

.reference-controls {
  position: sticky;
  z-index: 8;
  top: calc(var(--head-h) + 0.5rem);
  display: grid;
  gap: 0.6rem;
  width: calc(var(--measure) + var(--gutter) + var(--margin-col));
  margin: 1.4rem 0;
  padding: 0.75rem 0;
  background: color-mix(in srgb, var(--paper) 94%, transparent);
  border-top: 2px solid var(--ink);
  border-bottom: 1px solid var(--rule);
  backdrop-filter: blur(8px);
}
.reference-tabs { display: flex; flex-wrap: wrap; gap: 1.1rem; }
.reference-tabs button {
  padding: 0 0 0.2rem;
  color: var(--ink-faint);
  background: none;
  border: 0;
  border-bottom: 2px solid transparent;
  font-family: var(--ff-ui);
  font-size: 0.76rem;
}
.reference-tabs button span {
  margin-left: 0.3rem;
  font-size: 0.9em;
  font-variant-numeric: tabular-nums;
  opacity: 1;
}
.reference-tabs button:hover { color: var(--ink); }
.reference-tabs button.active {
  color: var(--ink);
  border-bottom-color: var(--flag);
  font-weight: 600;
}
.reference-search {
  width: 100%;
  padding: 0.5rem 0.6rem;
  color: var(--ink);
  background: var(--paper-raised);
  border: 1px solid var(--rule-strong);
  border-radius: 2px;
  font-family: var(--ff-ui);
  font-size: 0.82rem;
}
.reference-count {
  color: var(--ink-faint);
  font-family: var(--ff-ui);
  font-size: 0.7rem;
  font-variant-numeric: tabular-nums;
}

.reference-list {
  width: calc(var(--measure) + var(--gutter) + var(--margin-col));
  border-top: 1px solid var(--rule);
}
.reference-row {
  display: grid;
  grid-template-columns: 13.5rem 1fr;
  gap: 0 1.2rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--rule);
}
.reference-row:hover { background: var(--paper-sunk); }
.reference-row code {
  padding: 0;
  background: none;
  color: var(--ink);
  font-size: 0.8rem;
  font-weight: 600;
  word-break: break-word;
}
.reference-row p {
  margin: 0;
  color: var(--ink-muted);
  font-family: var(--ff-ui);
  font-size: 0.775rem;
  line-height: 1.45;
}
.reference-row small {
  grid-column: 2;
  color: var(--ink-faint);
  font-family: var(--ff-ui);
  font-size: 0.68rem;
}

/* --- 16. Cólofon e navegação de capítulo -------------------------------- */

.chapter-footer {
  grid-column: text;
  margin-top: 3.6rem;
  padding-top: 1.4rem;
  border-top: 2px solid var(--ink);
}
.page-navigation {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.6rem;
}
.page-navigation a {
  color: var(--ink);
  font-family: var(--ff-display);
  font-size: 1rem;
  text-decoration: none;
}
.page-navigation a:hover { color: var(--accent); }
.page-navigation a:last-child { text-align: right; }
.page-navigation small {
  display: block;
  margin-bottom: 0.15rem;
  color: var(--ink-faint);
  font-family: var(--ff-ui);
  font-size: 0.63rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.colophon {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 1.1rem;
  margin-top: 2rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--rule);
  color: var(--ink-faint);
  font-family: var(--ff-ui);
  font-size: 0.7rem;
}
.colophon button {
  padding: 0;
  color: var(--ink-muted);
  background: none;
  border: 0;
  border-bottom: 1px solid var(--rule-strong);
  font-size: inherit;
}
.colophon button:hover { color: var(--ink); }

.source-details {
  margin-top: 1.1rem;
  color: var(--ink-faint);
  font-family: var(--ff-ui);
  font-size: 0.72rem;
}
.source-details summary { cursor: pointer; }
.source-details summary:hover { color: var(--ink); }
.source-details p { margin: 0.6rem 0 0.4rem; text-align: left; }
.source-details ul { margin: 0; padding-left: 1.1rem; }
.source-details code { font-size: 0.94em; }

/* --- 17. Índice remissivo (pesquisa) ------------------------------------ */

.search-dialog {
  width: min(41rem, calc(100vw - 1.5rem));
  max-height: min(44rem, calc(100vh - 3rem));
  margin-top: 4.5rem;
  padding: 0;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--rule-strong);
  border-top: 3px solid var(--ink);
  box-shadow: 0 1.5rem 4rem color-mix(in srgb, var(--ink) 24%, transparent);
}
.search-dialog::backdrop {
  background: color-mix(in srgb, #1b1a17 46%, transparent);
  backdrop-filter: blur(2px);
}
.search-dialog-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 1.1rem 1.3rem 0.5rem;
}
.search-dialog-head .eyebrow {
  margin: 0 0 0.2rem;
  color: var(--ink-faint);
  font-family: var(--ff-ui);
  font-size: 0.63rem;
  letter-spacing: 0.17em;
  text-transform: uppercase;
}
.search-dialog-head h2 {
  margin: 0;
  font-family: var(--ff-display);
  font-size: 1.3rem;
  font-weight: 400;
}
.search-dialog-head button {
  padding: 0.1rem 0.4rem;
  color: var(--ink-faint);
  background: none;
  border: 0;
  font-size: 1.1rem;
}
.search-dialog-head button:hover { color: var(--ink); }

.search-field {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0 1.3rem;
  padding: 0 0.6rem;
  border: 1px solid var(--rule-strong);
  color: var(--ink-faint);
}
.search-field:focus-within { border-color: var(--focus); box-shadow: 0 0 0 2px color-mix(in srgb, var(--focus) 22%, transparent); }
.search-field input {
  width: 100%;
  padding: 0.6rem 0;
  background: none;
  border: 0;
  outline: 0;
  color: var(--ink);
  font-family: var(--ff-ui);
  font-size: 0.92rem;
}
.search-hint {
  margin: 0.6rem 1.3rem;
  color: var(--ink-faint);
  font-family: var(--ff-ui);
  font-size: 0.7rem;
}
.search-results {
  max-height: 28rem;
  overflow: auto;
  border-top: 1px solid var(--rule);
}
.search-result {
  display: grid;
  grid-template-columns: 9rem 1fr;
  gap: 0 1rem;
  padding: 0.6rem 1.3rem;
  border-bottom: 1px solid var(--rule);
  color: var(--ink);
  text-decoration: none;
}
.search-result:hover,
.search-result[aria-selected="true"] { background: var(--paper-sunk); color: var(--ink); }
.search-result[aria-selected="true"] { box-shadow: inset 2px 0 var(--flag); }
.search-result small {
  color: var(--ink-faint);
  font-family: var(--ff-ui);
  font-size: 0.64rem;
  letter-spacing: 0.09em;
  line-height: 1.7;
  text-transform: uppercase;
}
.search-result strong {
  font-family: var(--ff-display);
  font-size: 0.98rem;
  font-weight: 600;
}
.search-result span {
  grid-column: 2;
  display: block;
  color: var(--ink-muted);
  font-family: var(--ff-ui);
  font-size: 0.745rem;
  line-height: 1.4;
}
.search-empty {
  padding: 2.4rem 1.3rem;
  color: var(--ink-faint);
  font-family: var(--ff-ui);
  font-size: 0.82rem;
  text-align: center;
}
mark { background: var(--marker); color: inherit; }

/* --- 18. Toast ---------------------------------------------------------- */

.toast {
  position: fixed;
  z-index: 120;
  right: 1.4rem; bottom: 1.4rem;
  padding: 0.55rem 0.9rem;
  color: var(--paper);
  background: var(--ink);
  font-family: var(--ff-ui);
  font-size: 0.78rem;
}

/* --- 19. Adaptação ------------------------------------------------------ */

@media (max-width: 1200px) {
  .page {
    grid-template-columns:
      [text-start] minmax(0, var(--measure)) [text-end gutter-start margin-start] 0 [gutter-end margin-end];
    width: 100%;
    max-width: var(--measure);
  }
  .callout {
    float: none;
    width: auto;
    margin: 1.2rem 0;
    padding: 0.7rem 0 0.7rem 0.9rem;
    font-size: 0.83rem;
  }
  .screenshot,
  .table-wrap,
  .tool-index,
  .reference-controls,
  .reference-list { width: 100%; }
  .screenshot { grid-template-columns: 1fr; }
  .screenshot-frame { grid-column: 1; }
  .screenshot figcaption { grid-column: 1; margin-top: 0.5rem; }
  .gloss {
    position: static;
    width: auto;
    margin: 0.6rem 0 0;
    box-shadow: none;
  }
}

@media (max-width: 1080px) {
  :root { --hang: 0rem; }
  .book-main { padding-left: 2rem; }
  .section-numeral {
    position: static;
    display: block;
    margin-bottom: 0.2rem;
  }
  .steps > li { padding-left: 1.8rem !important; }
  .steps > li::before { right: auto; left: 0; }
}

@media (max-width: 900px) {
  :root { --head-h: 44px; --nav-w: min(20rem, 86vw); }
  .nav-toggle { display: inline-flex; }
  .head-brand { min-width: 0; }
  .head-brand .brand-edition { display: none; }
  .running-recto { display: none; }
  .head-button .label { display: none; }
  .head-button kbd { display: none; }
  .head-button { padding: 0 0.45rem; }
  .book-nav {
    transform: translateX(-102%);
    transition: transform 0.18s ease;
    box-shadow: 0 0 3rem color-mix(in srgb, var(--ink) 25%, transparent);
  }
  .nav-open .book-nav { transform: none; }
  .book-main {
    margin-left: 0;
    padding: calc(var(--head-h) + 2.2rem) 1.5rem 4rem;
  }
  .tool-spec { grid-template-columns: 1fr; gap: 0.4rem; }
  .search-result { grid-template-columns: 1fr; }
  .search-result small { line-height: 1.4; }
  .search-result span { grid-column: 1; }
  .reference-row { grid-template-columns: 1fr; gap: 0.2rem; }
  .reference-row small { grid-column: 1; }
}

@media (max-width: 560px) {
  body { font-size: 1.02rem; }
  .book-main { padding-left: 1.15rem; padding-right: 1.15rem; }
  .prose p { text-align: left; }
  .drop-cap::first-letter { font-size: 2.8em; }
  .page-navigation { grid-template-columns: 1fr; gap: 1rem; }
  .page-navigation a:last-child { text-align: left; }
  .manual-card { grid-template-columns: 1.7rem 1fr; gap: 0 0.6rem; }
  .stat-strip { gap: 0.4rem 1.4rem; }
  .search-dialog { margin-top: 0.75rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Pesquisa do índice e composição compacta dentro da aplicação. */
.nav-filter { display: block; margin: 0.75rem 0 1rem; }
.nav-filter input {
  width: 100%; padding: 0.55rem 0.65rem;
  background: var(--paper-raised); border: 1px solid var(--rule-strong);
  border-radius: 6px; font: 0.8rem var(--ff-ui);
}
.nav-filter input:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
.nav-empty { font: 0.8rem/1.5 var(--ff-ui); color: var(--ink-muted); }
[hidden] { display: none !important; }
:root[data-embedded="true"] { --nav-w: 15rem; --measure: 36rem; --margin-col: 0rem; --gutter: 1.5rem; --hang: 0rem; }
:root[data-embedded="true"] body { font-family: var(--ff-ui); font-size: 0.94rem; line-height: 1.65; }
:root[data-embedded="true"] .head-app-link,
:root[data-embedded="true"] #theme-toggle { display: none; }
:root[data-embedded="true"] .book-main { padding: calc(var(--head-h) + 1.5rem) 1.75rem 3rem; }
:root[data-embedded="true"] .page { grid-template-columns: [text-start] minmax(0, 1fr) [text-end]; width: 100%; max-width: 48rem; }
:root[data-embedded="true"] .callout { float: none; position: static; width: auto; margin: 1rem 0; }
:root[data-embedded="true"] .section-numeral { position: static; display: block; }
:root[data-embedded="true"] :is(.title-page h1, .chapter-opener h1, .manual-section > h2) { font-family: var(--ff-ui); }
:root[data-embedded="true"] .prose p { text-align: left; }
:root[data-embedded="true"] .screenshot { display: block; width: 100%; }
:root[data-embedded="true"] .screenshot figcaption { margin-top: 0.5rem; }
:root[data-embedded="true"] :is(.table-wrap, .tool-index, .reference-controls, .reference-list) { width: 100%; }
.card-grid { gap: 0.75rem; border-top: 0; }
.manual-card { padding: 1rem; border: 1px solid var(--rule); border-radius: 8px; background: var(--paper-raised); }
.manual-card strong { font-family: var(--ff-ui); font-size: 0.95rem; }
.manual-card .card-icon { color: var(--accent); }
.title-page { margin-bottom: 1.5rem; padding-bottom: 1.5rem; }
.title-page .imprint { margin-bottom: 1rem; }
.imprint-lines p { margin: 0; }
.title-page h1 { font-size: clamp(2rem, 4vw, 3rem); }
.title-page .title-sub { max-width: 100%; margin-bottom: 1rem; font-style: normal; }
.contents-block { margin-bottom: 1.5rem; }
:is(.contents-block, .chapter-contents) > summary {
  padding: 0.6rem 0; color: var(--accent); cursor: pointer; font: 0.82rem var(--ff-ui);
}
:is(.contents-block, .chapter-contents)[open] > summary { margin-bottom: 0.9rem; }
@media (min-width: 560px) {
  .card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 900px) {
  :root[data-embedded="true"] { --nav-w: min(20rem, 86vw); }
  :root[data-embedded="true"] .book-main { padding-left: 1.1rem; padding-right: 1.1rem; }
}

/* --- 20. Impressão ------------------------------------------------------ */

@media print {
  :root {
    --paper: #fff;
    --paper-sunk: #f4f4f2;
    --paper-raised: #fff;
    --ink: #000;
    --ink-muted: #333;
    --ink-faint: #555;
    --rule: #bbb;
    --rule-strong: #888;
    --accent: #000;
    --flag: #000;
    --measure: 100%;
    --hang: 0;
  }
  @page { margin: 18mm 16mm; }

  .running-head, .book-nav, .nav-scrim, .search-dialog, .toast,
  .chapter-footer, .listing-copy, .gloss { display: none !important; }

  .book-main { margin: 0; padding: 0; }
  .page { display: block; width: auto; max-width: none; }

  .callout {
    float: none;
    width: auto;
    margin: 0.8rem 0;
    padding-left: 0.7rem;
    border-left: 1px solid #888;
    page-break-inside: avoid;
  }
  .screenshot { display: block; width: auto; page-break-inside: avoid; }
  .screenshot figcaption { margin-top: 0.4rem; }
  .table-wrap, .tool-index, .reference-list, .reference-controls { width: auto; }
  .reference-controls { position: static; backdrop-filter: none; }
  pre { white-space: pre-wrap; page-break-inside: avoid; }
  .manual-section { page-break-inside: auto; }
  .manual-section > h2, .prose h3 { page-break-after: avoid; }
  .chapter-opener { page-break-after: avoid; }
  a { color: #000; text-decoration: none; }
  .prose a[href^="http"]::after { content: " (" attr(href) ")"; font-size: 0.82em; color: #555; }
}