/* Site styling for the GitHub Pages build.
 *
 * The colour tokens are the ones notebooks/figstyle.py validated for the
 * figures (lightness band, chroma floor, Machado-2009 CVD separation, WCAG
 * contrast against the chart surface). Reusing them here is not decoration:
 * the nine figures are drawn on #fcfcfb / #1a1a19, so the page has to be that
 * colour or every figure reads as a pasted-in grey block.
 */

:root {
  --surface: #fcfcfb;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --muted: #898781;
  --grid: #e1e0d9;
  --axis: #c3c2b7;
  --accent: #2a78d6;
  --accent-quiet: #eef4fc;
}

@media (prefers-color-scheme: dark) {
  :root {
    --surface: #1a1a19;
    --ink: #ffffff;
    --ink-2: #c3c2b7;
    --muted: #898781;
    --grid: #2c2c2a;
    --axis: #383835;
    --accent: #3987e5;
    --accent-quiet: #16202c;
  }
}

* { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--surface);
  color: var(--ink);
  /* Serif for the body: these pages are 4,000-word essays, not UI. */
  font-family: Charter, "Bitstream Charter", "Iowan Old Style", Georgia, Cambria,
               "Times New Roman", serif;
  font-size: 1.125rem;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

/* --- chrome ------------------------------------------------------------- */

.site-header,
.site-footer,
.site-nav {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
}

.site-header {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  align-items: baseline;
  justify-content: space-between;
  max-width: 46rem;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 1.25rem;
  border-bottom: 1px solid var(--grid);
}

.site-title {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--ink);
  text-decoration: none;
}

.site-nav {
  display: flex;
  gap: 1.25rem;
  font-size: 0.9rem;
}

.site-nav a {
  color: var(--ink-2);
  text-decoration: none;
}

.site-nav a:hover,
.site-title:hover {
  color: var(--accent);
}

/* --- body --------------------------------------------------------------- */

.prose {
  /* Figures are allowed the full 46rem; text is held to a readable measure. */
  max-width: 46rem;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

.prose > p,
.prose > ul,
.prose > ol,
.prose > h2,
.prose > h3,
.prose > h4,
.prose > blockquote {
  max-width: 34rem;
}

.prose h1 {
  font-size: 2.35rem;
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin: 0 0 0.6rem;
  max-width: 30rem;
}

/* The essay's standfirst is an h3 immediately under the h1. */
.prose h1 + h3 {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 1.05rem;
  font-weight: 400;
  line-height: 1.5;
  color: var(--ink-2);
  margin: 0 0 2.5rem;
  max-width: 32rem;
}

.prose h2 {
  font-size: 1.5rem;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin: 3rem 0 1rem;
}

.prose h3 {
  font-size: 1.15rem;
  margin: 2.25rem 0 0.75rem;
}

.prose a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

.prose strong { font-weight: 700; }

.prose blockquote {
  margin: 1.75rem 0;
  padding: 0.1rem 0 0.1rem 1.15rem;
  border-left: 2px solid var(--axis);
  color: var(--ink-2);
  font-size: 0.95rem;
}

.prose hr {
  border: 0;
  border-top: 1px solid var(--grid);
  margin: 3rem 0;
}

/* --- figures ------------------------------------------------------------ */

.prose img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 2rem auto 0.75rem;
}

/* Figure captions are the bold "**Figure 1.**" paragraph after each image.
   Nothing in the markdown marks them, so they are matched structurally. */
.prose picture + p,
.prose p > img + em {
  font-size: 0.92rem;
  color: var(--ink-2);
  line-height: 1.5;
}

.prose picture + p {
  max-width: 34rem;
  margin: 0 auto 2.5rem;
}

/* --- tables ------------------------------------------------------------- */

.table-scroll,
.prose table {
  display: block;
  overflow-x: auto;
  max-width: 100%;
}

.prose table {
  border-collapse: collapse;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 0.95rem;
  margin: 1.75rem 0 2rem;
  width: 100%;
}

.prose th,
.prose td {
  border-bottom: 1px solid var(--grid);
  padding: 0.6rem 0.9rem 0.6rem 0;
  text-align: left;
  vertical-align: top;
}

.prose th {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom-color: var(--axis);
}

/* --- code --------------------------------------------------------------- */

.prose code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.875em;
  background: var(--accent-quiet);
  padding: 0.12em 0.35em;
  border-radius: 3px;
}

.prose pre {
  background: var(--accent-quiet);
  border: 1px solid var(--grid);
  border-radius: 4px;
  padding: 0.9rem 1rem;
  overflow-x: auto;
  font-size: 0.9rem;
  max-width: 34rem;
}

.prose pre code {
  background: none;
  padding: 0;
}

/* --- landing page ------------------------------------------------------- */

.lede {
  font-size: 1.3rem;
  line-height: 1.5;
  color: var(--ink-2);
  max-width: 32rem;
}

.verdict {
  font-size: 1.3rem;
  line-height: 1.5;
  max-width: 32rem;
}

.reads {
  list-style: none;
  padding: 0;
  margin: 2.5rem 0 0;
  max-width: 34rem;
}

.reads li {
  border-top: 1px solid var(--grid);
  padding: 1.15rem 0;
}

.reads a {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 1.05rem;
  font-weight: 600;
  text-decoration: none;
}

.reads a:hover { text-decoration: underline; }

.reads p {
  margin: 0.3rem 0 0;
  font-size: 0.95rem;
  color: var(--ink-2);
  line-height: 1.5;
}

/* --- footer ------------------------------------------------------------- */

.site-footer {
  max-width: 46rem;
  margin: 0 auto;
  padding: 1.75rem 1.25rem 3.5rem;
  border-top: 1px solid var(--grid);
  font-size: 0.9rem;
  color: var(--ink-2);
}

.site-footer a { color: var(--accent); }

.site-footer .fine {
  font-size: 0.82rem;
  color: var(--muted);
}

@media (max-width: 34rem) {
  body { font-size: 1.06rem; }
  .prose { padding-top: 1.75rem; }
  .prose h1 { font-size: 1.85rem; }
  .prose h2 { font-size: 1.3rem; }
  .lede, .verdict { font-size: 1.15rem; }
}