@font-face {
  font-family: "Source Serif 4";
  src: url("fonts/SourceSerif4Variable-Roman.ttf.woff2") format("woff2");
  font-style: normal;
  font-weight: 200 900;
  font-display: swap;
}

@font-face {
  font-family: "Source Serif 4";
  src: url("fonts/SourceSerif4Variable-Italic.ttf.woff2") format("woff2");
  font-style: italic;
  font-weight: 200 900;
  font-display: swap;
}

@font-face {
  font-family: "Source Sans 3";
  src: url("fonts/SourceSans3VF-Upright.ttf.woff2") format("woff2");
  font-style: normal;
  font-weight: 200 900;
  font-display: swap;
}

@font-face {
  font-family: "Source Sans 3";
  src: url("fonts/SourceSans3VF-Italic.ttf.woff2") format("woff2");
  font-style: italic;
  font-weight: 200 900;
  font-display: swap;
}

@font-face {
  font-family: "Source Code Pro";
  src: url("fonts/SourceCodeVF-Upright.ttf.woff2") format("woff2");
  font-style: normal;
  font-weight: 200 900;
  font-display: swap;
}

@font-face {
  font-family: "Source Code Pro";
  src: url("fonts/SourceCodeVF-Italic.ttf.woff2") format("woff2");
  font-style: italic;
  font-weight: 200 900;
  font-display: swap;
}

body { font-optical-sizing: auto; }
/* The prose uses serif type; interface text and exhibits use its sans companion. */
.sidebar, .navbar, #TOC, .quarto-page-breadcrumbs, .nav-page,
.quarto-title-meta, .quarto-title .subtitle, .quarto-figure figcaption,
caption, table, .callout-title-container, .quarto-search-results {
  font-family: "Source Sans 3", "Segoe UI", sans-serif;
}
h1, h2, h3, h4, h5, h6 { font-weight: 600; line-height: 1.2; }
.sidebar { font-size: 0.9rem; line-height: 1.4; }
#TOC { line-height: 1.4; }
.quarto-figure figcaption { font-size: 0.85rem; line-height: 1.45; }
pre, code, kbd, samp { font-variant-ligatures: none; }
pre.sourceCode, pre code { font-size: 0.84rem; line-height: 1.55; }

/* Long inline filenames must not widen the page on phones. */
:not(pre) > code { overflow-wrap: anywhere; white-space: normal; }

/* Preserve readable columns inside the existing keyboard-accessible scroll region. */
#tbl-data-structures table { min-width: 36rem; }

/* Keep side-by-side labels readable on small screens. */
.figure-scroll { overflow-x: auto; }
.figure-scroll img { min-width: 630px; }

/* Short two-column comparisons fit phones without reducing the book's text size. */
#tbl-boundary-checks table, #tbl-disciplinary-data table {
  min-width: 0;
  width: 100%;
  table-layout: fixed;
  line-height: 1.4;
  hyphens: auto;
  overflow-wrap: anywhere;
}
#tbl-boundary-checks th:first-child { width: 30%; }
#tbl-disciplinary-data th:first-child { width: 40%; }
#tbl-disciplinary-data table { table-layout: auto; }

/* Wider reference tables scroll sideways on phones; function names stay whole. */
#tbl-input-formats table, #tbl-output-choices table {
  min-width: 38rem;
  width: 100%;
  line-height: 1.4;
}
#tbl-input-formats td code, #tbl-output-choices td code { white-space: nowrap; overflow-wrap: normal; }
#tbl-disciplinary-data th:first-child, #tbl-disciplinary-data td:first-child {
  overflow-wrap: normal;
  hyphens: manual;
}

/* Foundations reference tables keep operators and results readable on phones. */
#tbl-basics-comparisons table { min-width: 30rem; }
#tbl-basics-numeric-reference table { min-width: 42rem; }
#tbl-basics-comparisons code, #tbl-basics-numeric-reference code {
  white-space: nowrap;
  overflow-wrap: normal;
}

/* Draft chapter references keep function names whole within their scroll regions. */
#tbl-read-write table, #tbl-mutate-task-map table {
  min-width: 38rem;
  width: 100%;
  line-height: 1.4;
}
#tbl-read-write code, #tbl-mutate-task-map code {
  white-space: nowrap;
  overflow-wrap: normal;
}

/* Keep source variable names intact in the introductory country table. */
#tbl-tibble-countries th code { white-space: nowrap; overflow-wrap: normal; }

/* Keep the introductory import calls readable inside a mobile scroll region. */
#tbl-first-readers table { min-width: 32rem; }
#tbl-first-readers code { white-space: nowrap; overflow-wrap: normal; }