:root {
  color-scheme: light;
  --ink: #17202a;
  --muted: #56616d;
  --paper: #ffffff;
  --wash: #f4f7fa;
  --line: #d9e0e6;
  --brand: #1e407c;
  --brand-dark: #14305f;
  --accent: #c43b4d;
  --solution: #eef8f0;
  --max: 78rem;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.62;
  color: var(--ink);
  background: var(--wash);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body { margin: 0; background: var(--wash); }

a { color: #1659a8; text-underline-offset: 0.16em; }
a:hover { color: #0f3f78; }
a:focus-visible, summary:focus-visible { outline: 3px solid #f2c94c; outline-offset: 3px; }

.skip-link {
  position: fixed;
  top: 0.5rem;
  left: 0.5rem;
  z-index: 100;
  transform: translateY(-180%);
  padding: 0.55rem 0.8rem;
  color: #fff;
  background: #111;
  border-radius: 0.35rem;
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  color: #fff;
  background: linear-gradient(125deg, var(--brand-dark), var(--brand));
  border-bottom: 0.3rem solid var(--accent);
}

.site-header__inner, .site-footer__inner, .page-shell {
  width: min(calc(100% - 2rem), var(--max));
  margin-inline: auto;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  padding: 1.1rem 0;
}

.site-title { margin: 0; font-size: clamp(1.05rem, 2vw, 1.4rem); font-weight: 750; }
.site-subtitle { margin: 0.15rem 0 0; color: #e2eaf6; font-size: 0.9rem; }
.site-nav { display: flex; flex-wrap: wrap; gap: 0.45rem 1rem; }
.site-nav a { color: #fff; font-weight: 650; }

.page-shell {
  margin-block: 1.4rem 2rem;
  padding: clamp(1rem, 3.4vw, 3rem);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 0.65rem;
  box-shadow: 0 0.65rem 2rem rgb(20 48 95 / 8%);
}

main { min-width: 0; }
h1, h2, h3, h4, h5 { line-height: 1.24; color: #10294c; }
h1 { margin: 0 0 1.25rem; font-size: clamp(2rem, 5vw, 3.35rem); letter-spacing: -0.035em; }
h2 { margin-top: 2.4rem; padding-bottom: 0.35rem; border-bottom: 2px solid #e1e7ed; }
h3 { margin-top: 1.8rem; }
p, li { max-width: 100%; }

blockquote {
  margin: 1.5rem 0;
  padding: 0.8rem 1.1rem;
  background: #f2f6fb;
  border-left: 0.3rem solid var(--brand);
}

.btn {
  display: inline-block;
  padding: 0.65rem 1rem;
  color: #fff;
  background: var(--brand);
  border-radius: 0.35rem;
  font-weight: 700;
  text-decoration: none;
}

.list.grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.quarto-grid-link { display: block; height: 100%; color: inherit; text-decoration: none; }
.card {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  transition: transform 120ms ease, box-shadow 120ms ease;
}
.quarto-grid-link:hover .card { transform: translateY(-2px); box-shadow: 0 0.65rem 1.4rem rgb(20 48 95 / 12%); }
.card-img-top { margin: 0; max-width: none; background: #eef3f8; }
.card-img { display: block; width: 100%; height: 9.5rem !important; object-fit: cover; }
.card-body { flex: 1; padding: 0.9rem; }
.card-title { margin: 0 0 0.75rem; font-size: 1rem; }
.card-footer { padding: 0.55rem 0.9rem; color: var(--muted); background: #f8fafc; font-size: 0.8rem; }
.listing-categories { display: flex; flex-wrap: wrap; gap: 0.3rem; }
.listing-category { padding: 0.14rem 0.42rem; border-radius: 999px; background: #e9f0fa; color: #274b78; font-size: 0.76rem; }
.pending-source::after { content: " · sumber Inggris"; color: var(--muted); font-size: 0.78rem; }

.theorem, .definition, .example {
  margin: 1.25rem 0;
  padding: 1rem 1.1rem;
  border: 1px solid #cfdae5;
  border-left: 0.3rem solid var(--brand);
  border-radius: 0.35rem;
  background: #fbfdff;
}
.example { border-left-color: #9b5e16; background: #fffaf2; }
.theorem-title { display: block; margin-bottom: 0.5rem; color: #10294c; }

details.solution {
  margin: 1rem 0 1.5rem;
  border: 1px solid #acd0b4;
  border-radius: 0.4rem;
  background: var(--solution);
}
details.solution > summary { padding: 0.75rem 1rem; cursor: pointer; font-weight: 750; color: #195a2a; }
details.solution > :not(summary) { margin-inline: 1rem; }

.math.display { display: block; max-width: 100%; overflow-x: auto; overflow-y: hidden; padding-block: 0.2rem; }
.math.inline { display: inline-block; max-width: 100%; overflow-x: auto; overflow-y: hidden; vertical-align: middle; }
mjx-container[jax="SVG"][display="true"] { overflow-x: auto; overflow-y: hidden; padding-block: 0.25rem; }

table { width: auto; max-width: 100%; margin: 1rem auto; border-collapse: collapse; }
th, td { padding: 0.45rem 0.65rem; border: 1px solid #cfd8e1; }
th { background: #f0f4f8; }

.edition-note {
  margin: 0 0 1.5rem;
  padding: 0.85rem 1rem;
  color: #34404c;
  background: #f7f9fb;
  border: 1px solid var(--line);
  border-radius: 0.35rem;
  font-size: 0.92rem;
}

.site-footer { color: #dfe7f1; background: #14233a; }
.site-footer__inner { padding: 1.25rem 0 1.5rem; font-size: 0.88rem; }
.site-footer a { color: #fff; }

@media (max-width: 64rem) { .list.grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 42rem) {
  .site-header__inner { align-items: flex-start; flex-direction: column; }
  .page-shell { width: 100%; margin-block: 0; border: 0; border-radius: 0; box-shadow: none; }
  .list.grid { grid-template-columns: 1fr; }
  h1 { font-size: 2rem; }
}

@media print {
  :root { background: #fff; font-size: 10.5pt; }
  .site-header, .site-footer, .skip-link { display: none !important; }
  .page-shell { width: 100%; max-width: none; margin: 0; padding: 0; border: 0; box-shadow: none; }
  a { color: inherit; text-decoration: none; }
  details.solution { break-inside: avoid; }
  details.solution > * { display: block !important; }
}


/* Cumulative reader reflow admitted with Lesson 02. */
main img:not(.card-img),
main svg,
main video,
main canvas {
  display: block;
  max-width: 100%;
  height: auto;
  margin-inline: auto;
}

main figure,
main .quarto-figure,
main .quarto-float,
main .quarto-figure > *,
main .quarto-float > * {
  max-width: 100%;
}


/* Lesson 05: readable, full-width static code blocks. */
.code-copy-outer-scaffold {
  position: relative;
  max-width: 100%;
  margin: 1rem 0;
}

main .cell,
main .cell-output,
main .cell-output-display,
main .sourceCode {
  min-width: 0;
  max-width: 100%;
}

main pre {
  position: relative;
  display: block;
  width: 100%;
  min-width: 0;
  max-width: 100%;
  margin: 0;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  color: #17202a;
  background: #f6f8fa;
  border: 1px solid #d9e0e6;
  border-radius: 0.4rem;
  font: 0.9rem/1.55 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  white-space: pre;
}

.codeblock-with-label pre[class*="lang-label-"] {
  padding-top: 2.65rem;
}

.codeblock-with-label pre[class*="lang-label-"]::before {
  position: absolute;
  inset: 0 0 auto 0;
  display: block;
  padding: 0.42rem 0.8rem;
  color: #34404c;
  background: #e9eef4;
  border-bottom: 1px solid #d0d8e1;
  font: 700 0.76rem/1.25 ui-sans-serif, system-ui, sans-serif;
  letter-spacing: 0.04em;
}

/* Quarto's copy runtime is deliberately absent in the static offline reader. */
.code-copy-button { display: none !important; }


/* Lesson 06: use the available reader width for the centered normal-curve figure. */
#fig-standardnormal,
#fig-standardnormal figure,
#fig-standardnormal [aria-describedby],
#fig-standardnormal a.lightbox {
  display: block;
  width: 100%;
  max-width: 100%;
  margin-inline: auto;
}

#fig-standardnormal img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  margin-inline: auto;
}


/* Lessons 07–12: readable, centered, full-width instructional surfaces. */
main#quarto-document-content figure,
main#quarto-document-content .quarto-figure,
main#quarto-document-content .cell-output-display,
main#quarto-document-content a.lightbox {
  display: block;
  width: 100%;
  max-width: 100%;
  margin-inline: auto;
}

main#quarto-document-content figure img,
main#quarto-document-content .quarto-figure img,
main#quarto-document-content img[data-o006-asset-id] {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  margin-inline: auto;
}

main#quarto-document-content pre,
main#quarto-document-content .sourceCode,
main#quarto-document-content .cell-output {
  max-width: 100%;
  overflow-x: auto;
  white-space: pre;
}

main#quarto-document-content table {
  display: block;
  width: max-content;
  max-width: 100%;
  overflow-x: auto;
  margin-inline: auto;
}


/* Lesson 12: complete offline regression surfaces and additive repair notes. */
main#quarto-document-content .target-only-note,
main#quarto-document-content .target-only-proof,
main#quarto-document-content .target-only-reproducibility,
main#quarto-document-content .offline-video-equivalent,
main#quarto-document-content .component-provenance {
  width: 100%;
  max-width: 100%;
  margin: 1rem 0;
  padding: 0.85rem 1rem;
  overflow-wrap: anywhere;
  background: #f7f9fb;
  border: 1px solid #cfd8e1;
  border-radius: 0.4rem;
}

main#quarto-document-content .target-only-note {
  border-inline-start: 0.35rem solid var(--brand);
}

main#quarto-document-content .target-derived-math {
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
}

main#quarto-document-content table.reader-responsive-table {
  display: block;
  width: max-content;
  max-width: 100%;
  overflow-x: auto;
  margin-inline: auto;
}