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/*
  Bookdown GitBook — Refined CSS Theme (v2)
  - Fixes font-family conflicts and link monospace issue
  - Improves code block contrast and syntax colors
  - Uses modern wrapping (overflow-wrap) and safer selectors
  - Keeps GitBook layout tweaks (sidebar/header/page width)
*/

:root{
  /* Core palette (Tech) */
  --bg: #0b1120;            /* slate-950 */
  --text: #e5e7eb;          /* gray-200 */
  --muted: #94a3b8;         /* slate-400 */
  --primary: #22d3ee;       /* cyan-400 */
  --primary-700: #06b6d4;   /* cyan-500 */
  --accent: #a78bfa;        /* violet-400 */
  --border: rgba(148,163,184,0.18);
  --highlight: rgba(34,211,238,0.16);

  /* Typography */
  --font-body: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  --font-heading: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* Code */
  --code-bg: #070b18;
  --code-text: #e5e7eb;
  --inline-code-bg: rgba(148,163,184,0.12);
  --inline-code-text: #e5e7eb;

  /* Radii & shadows */
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 14px 40px rgba(0,0,0,0.35);
  --shadow-sm: 0 8px 24px rgba(0,0,0,0.25);

  --line: 1.62;
}

/* Base --------------------------------------------------------------- */
html{ scroll-behavior:smooth; }

body{
  background:
    radial-gradient(900px 450px at 18% 10%, rgba(34,211,238,0.12), transparent 60%),
    radial-gradient(900px 450px at 82% 18%, rgba(167,139,250,0.10), transparent 62%),
    linear-gradient(to bottom, rgba(255,255,255,0.03), rgba(255,255,255,0.00)),
    repeating-linear-gradient(0deg, rgba(148,163,184,0.06) 0, rgba(148,163,184,0.06) 1px, transparent 1px, transparent 28px),
    repeating-linear-gradient(90deg, rgba(148,163,184,0.05) 0, rgba(148,163,184,0.05) 1px, transparent 1px, transparent 28px),
    var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1.3rem;
  line-height: 1.68;
  text-rendering: optimizeLegibility;
  font-feature-settings: "liga" 1, "calt" 1;
}

/* Constrain content width */
.book .book-body .page-wrapper .page-inner{ max-width: 920px; }

/* Text rhythm */
.page-inner p{
  font-size: 1.3rem;
  margin: 1rem 0;
}
.page-inner strong, .page-inner em{ color: #111827; }

/* Headings ----------------------------------------------------------- */
.page-inner h1,
.page-inner h2,
.page-inner h3,
.page-inner h4,
.page-inner h5,
.page-inner h6{
  font-family: var(--font-heading);
  position: relative;
  scroll-margin-top: 100px;
  margin-bottom: .6rem;
}

.page-inner h1{ font-size: 2rem; margin-top: 2rem; }
.page-inner h2{ font-size: 1.6rem; margin-top: 1.75rem; }
.page-inner h3{ font-size: 1.3rem; margin-top: 1.4rem; }
.page-inner h4{ font-size: 1.1rem; margin-top: 1.1rem; }

.page-inner h1,
.page-inner h2{
  border-bottom: 1px solid var(--border);
  padding-bottom: .45rem;
}

.page-inner h1, .page-inner h2{
  border-bottom: 1px solid var(--border);
  padding-bottom: .45rem;
}
.page-inner h1::after,
.page-inner h2::after{
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 140px;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 999px;
  box-shadow: 0 0 18px rgba(253, 224, 71, 0.15);
}

/* Fancy heading anchors (GitBook) */
.page-inner h1:hover .anchor,
.page-inner h2:hover .anchor,
.page-inner h3:hover .anchor,
.page-inner h4:hover .anchor{ opacity: 1; }

.page-inner .anchor{
  opacity: 0;
  transition: opacity .2s ease;
  margin-left: .5rem;
  text-decoration: none !important;
}

/* Links -------------------------------------------------------------- */
a{
  color: var(--primary);
  text-decoration: none;
  overflow-wrap: anywhere;
  word-break: break-word;
  border-bottom: 1px solid rgba(34,211,238,0.25);
  transition: color .15s ease, border-color .15s ease, text-shadow .15s ease;
}
a:hover{
  color: #e0f2fe;
  border-bottom-color: rgba(167,139,250,0.7);
  text-shadow: 0 0 14px rgba(34,211,238,0.35);
}

/* Sidebar ------------------------------------------------------------ */
.book .book-summary{
  background: rgba(7,10,22,0.92);
  border-right: 1px solid var(--border);
}
.book .book-summary::before{
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(520px 220px at 18% 8%, rgba(34,211,238,0.12), transparent 60%),
              radial-gradient(520px 220px at 70% 24%, rgba(167,139,250,0.10), transparent 62%);
}

.book .book-summary .book-search{ padding: 0.75rem 1rem; }

.book .book-summary .book-search input,
.book .book-header .input-search input{
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .5rem .75rem;
  font-size: .95rem;
  transition: box-shadow .2s ease, border-color .2s ease;
}

.book .book-summary .book-search input:focus,
.book .book-header .input-search input:focus{
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(37,99,235,0.15);
}

.book .book-summary ul.summary{ padding: .75rem 0 1.5rem 0; }

.book .book-summary ul.summary li a{
  color: #cbd5e1;
  border-radius: 12px;
  padding: .45rem .8rem;
  display: block;
  border: 1px solid transparent;
}
.book .book-summary ul.summary li a code{ color: inherit; }

.book .book-summary ul.summary li a:hover{
  background: rgba(34,211,238,0.08);
  color: #e0f2fe;
  border-color: rgba(34,211,238,0.18);
}

.book .book-summary ul.summary li.active > a{
  background: rgba(167,139,250,0.12);
  color: #e9d5ff;
  font-weight: 700;
  border-color: rgba(167,139,250,0.22);
}

/* Header & navigation ------------------------------------------------ */
.book .book-header{
  border-bottom: 1px solid var(--border);
  background: rgba(2,6,23,.78);
  backdrop-filter: saturate(160%) blur(10px);
}

.book .navigation{
  border-top: 1px dashed var(--border);
  margin-top: 2rem;
  padding-top: 1rem;
}

.book .navigation a{
  border: 1px solid var(--border);
  padding: .6rem .9rem;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  background: #fff;
}

.book .navigation a:hover{ border-color: var(--primary); }

/* Figures & images --------------------------------------------------- */
.figure, figure{ margin: 1.25rem auto; text-align: center; }

img{
  border-radius: var(--radius);
  box-shadow: 0 16px 40px rgba(0,0,0,0.35);
  max-width: 100%;
  height: auto;
}

/* If you want "full width only when explicitly in a figure", keep it narrow */
.figure > img, figure > img{ width: min(100%, 980px); }

figcaption, .caption{
  color: var(--muted);
  font-size: .9rem;
  margin-top: .4rem;
}

/* Tables ------------------------------------------------------------- */
table{
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 1rem 0;
  box-shadow: var(--shadow-sm);
  border-radius: var(--radius);
  overflow: hidden;
}

th, td{
  padding: .75rem .9rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

th{
  text-align: left;
  background: rgba(148,163,184,0.10);
  font-weight: 800;
  color: #e5e7eb;
}

tr:nth-child(even) td{ background: rgba(148,163,184,0.04); }
tr:hover td{ background: rgba(34,211,238,0.06); }

/* Code ---------------------------------------------------------------- */
pre, code{ font-family: var(--font-mono); }

:not(pre) > code{
  background: var(--inline-code-bg);
  color: var(--inline-code-text);
  padding: .15rem .35rem;
  border-radius: 6px;
  border: 1px solid var(--border);
}

pre, pre code, .sourceCode, .sourceCode pre{
  background: var(--code-bg);
  color: var(--code-text);
  border-radius: var(--radius);
  border: 1px solid rgba(34,211,238,0.14);
}

pre, .sourceCode pre{
  padding: 1rem 1.1rem;
  overflow: auto;
  box-shadow: var(--shadow-sm);
  position: relative;
}
pre::before, .sourceCode pre::before{
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: var(--radius);
  pointer-events: none;
  background: linear-gradient(90deg, rgba(34,211,238,0.35), rgba(167,139,250,0.25));
  filter: blur(14px);
  opacity: .22;
}

/* Pandoc line numbers */
pre.numberSource code > span{
  display: inline-block;
  min-width: 2.25em;
  padding-right: .75em;
  color: #94a3b8;
  border-right: 1px solid rgba(255,255,255,.08);
  margin-right: .75em;
}

/* Pandoc syntax tokens (balanced for dark code bg) */
code span.kw{ color: #93c5fd; font-weight: 700; }   /* keywords */
code span.st{ color: #fbbf24; font-weight: 700; }   /* strings */
code span.dv, code span.bn, code span.fl{ color: #fca5a5; font-weight: 700; } /* numbers */
code span.ch, code span.sc{ color: #fbcfe8; }
code span.cf{ color: #c4b5fd; font-weight: 600; }   /* control flow */
code span.fu{ color: #86efac; }                     /* functions */
code span.op{ color: #fda4af; font-weight: 700; }   /* operators */

/* Blockquotes & callouts -------------------------------------------- */
blockquote{
  margin: 1.25rem 0;
  padding: 1rem 1.25rem 1rem 1.1rem;
  border-left: 6px solid var(--accent);
  background: linear-gradient(180deg, #ecfeff, #ffffff);
  border-radius: 10px;
  box-shadow: var(--shadow-sm);
  color: inherit;
}
blockquote p{ margin: 0.2rem 0; }

/* Admonition-like boxes: <div class="admonition note"> ... ---------- */
.admonition{
  margin: 1.25rem 0;
  padding: 1rem 1.25rem;
  border: 1px solid var(--border);
  border-left: 6px solid var(--primary);
  border-radius: var(--radius);
  background: #ffffff;
  box-shadow: var(--shadow-sm);
}

.admonition.note{ border-left-color: var(--primary); }
.admonition.tip{ border-left-color: #22c55e; }
.admonition.warning{ border-left-color: #f59e0b; }
.admonition.caution{ border-left-color: #ef4444; }

.admonition .admonition-title{
  font-weight: 700;
  margin-bottom: .35rem;
  color: #111827;
}

/* Lists -------------------------------------------------------------- */
ul, ol{ padding-left: 1.2rem; }
ul li{ margin: .35rem 0; }
ol li{ margin: .3rem 0; }

/* Footnotes ---------------------------------------------------------- */
.footnotes{
  border-top: 1px dashed var(--border);
  margin-top: 2rem;
  padding-top: 1rem;
}
.footnote-ref{ font-size: .85rem; }

/* Badges & kbd ------------------------------------------------------- */
.badge{
  display: inline-block;
  font-size: .75rem;
  padding: .15rem .5rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #f9fafb;
  color: #111827;
}

kbd{
  font-family: var(--font-mono);
  background: #111827;
  color: #f9fafb;
  padding: .15rem .35rem;
  border-radius: 6px;
  border: 1px solid rgba(255,255,255,.12);
  box-shadow: inset 0 -2px 0 rgba(0,0,0,.2);
  font-size: .8rem;
}

/* Inline alerts ------------------------------------------------------ */
.mark{ background: var(--highlight); padding: .1rem .25rem; border-radius: 4px; }
.alert{ padding: .75rem .9rem; border-radius: var(--radius-sm); border: 1px solid var(--border); margin: 1rem 0; }
.alert.success{ background: #ecfdf5; border-color: #a7f3d0; }
.alert.info{ background: #eff6ff; border-color: #bfdbfe; }
.alert.warn{ background: #fffbeb; border-color: #fde68a; }
.alert.error{ background: #fef2f2; border-color: #fecaca; }

/* MathJax tweaks ----------------------------------------------------- */
.MathJax_Display{
  overflow-x: auto;
  padding: .5rem .75rem;
  border-radius: var(--radius-sm);
  background: #fbfbfd;
}

/* Search highlight --------------------------------------------------- */
mark.search-highlight{ background: #fde68a; padding: 0 .15rem; border-radius: 4px; }

/* HR ----------------------------------------------------------------- */
hr{ border: none; border-top: 1px solid var(--border); margin: 2rem 0; }

/* Buttons ------------------------------------------------------------ */
.btn{
  display: inline-block;
  padding: .55rem .9rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: #fff;
  box-shadow: var(--shadow-sm);
  text-decoration: none;
}
.btn:hover{ border-color: var(--primary); text-decoration: none; }

/* TOC inside page ---------------------------------------------------- */
.toc{
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .9rem;
  background: #fff;
  box-shadow: var(--shadow-sm);
}
.toc ul{ margin: 0; }
.toc a{ color: #374151; }
.toc a:hover{ color: var(--primary-700); }

/* Captions after code blocks (knitr) -------------------------------- */
div.sourceCode + p.caption, pre + p.caption{
  text-align: center;
  color: var(--muted);
  font-size: .9rem;
  margin-top: .35rem;
}

/* Dark mode ---------------------------------------------------------- */
@media (prefers-color-scheme: dark){
  :root{
    --bg: #0b1120;          /* slate-950 */
    --text: #e5e7eb;        /* gray-200 */
    --muted: #9ca3af;       /* gray-400 */
    --border: #1f2937;      /* slate-800 */
    --inline-code-bg: #111827;
    --inline-code-text: #e5e7eb;
    --primary: #60a5fa;
    --primary-700: #93c5fd;
    --code-bg: #0a0f1f;
    --code-text: #e5e7eb;
  }

  body{ background: var(--bg); color: var(--text); }
  .book .book-summary{ background: #0f172a; border-right-color: var(--border); }
  .book .book-summary ul.summary li a{ color: #cbd5e1; }
  .book .book-summary ul.summary li a:hover{ background: #0b1225; }
  th{ background: #0f172a; color: #e5e7eb; }
  tr:nth-child(even) td{ background: #0a0f1f; }
  tr:hover td{ background: #0d1426; }
  .toc{ background: #0b1225; }
  .book .book-header{ background: rgba(2,6,23,.85); border-bottom-color: var(--border); }
  blockquote{ background: linear-gradient(180deg, #072b33, #0b1120); }
  .admonition{ background: #0b1120; }
}

/* Print -------------------------------------------------------------- */
@media print{
  .book .book-summary,
  .book .book-header,
  .navigation{ display: none !important; }

  .page-inner{ max-width: none !important; }
  a{ color: #000; text-decoration: none; }
  img, pre, .sourceCode pre{ box-shadow: none; }
}

/* Fix: cabeçalho de tabela opaco/invisível (GitBook/Bookdown) */
.page-inner table thead,
.page-inner table thead tr,
.page-inner table thead th {
  opacity: 1 !important;
  color: #111827 !important;      /* texto bem visível */
  text-shadow: none !important;
  filter: none !important;
}

.page-inner table thead th {
  background: #e5e7eb !important; /* um pouco mais contrastante que #f3f4f6 */
  font-weight: 800 !important;
}

/* Se você usa kableExtra/Bootstrap, isso ajuda também */
.page-inner table.table thead th,
.page-inner table.table thead td {
  opacity: 1 !important;
  color: #111827 !important;
}