/* myself — one column, one typeface family, nothing that moves. */
:root {
  --paper: #f7f4ee; --ink: #1c1b19; --soft: #6b665d; --line: #e3ded3; --wash: #efeae0;
  --accent: #9a4b1f; --measure: 37rem;
}
@media (prefers-color-scheme: dark) {
  :root { --paper: #16150f; --ink: #ece7dc; --soft: #a19b8f; --line: #2b2921; --wash: #1f1d16; --accent: #e3a473; }
}
* { box-sizing: border-box; }
html { background: var(--paper); color: var(--ink); -webkit-text-size-adjust: 100%; }
body {
  margin: 0; padding: 0 1.25rem 4rem;
  font: 400 clamp(1.05rem, 0.95rem + 0.4vw, 1.2rem)/1.65 "Iowan Old Style", "Palatino Linotype", Palatino, Charter, Georgia, "Noto Serif", serif;
  font-feature-settings: "onum" 0, "lnum" 1;
}
main, .top nav, footer { max-width: var(--measure); margin: 0 auto; }
a { color: inherit; text-decoration: underline; text-decoration-color: var(--line); text-underline-offset: 0.2em; text-decoration-thickness: 1px; }
a:hover { text-decoration-color: var(--accent); }

.top { padding: 1.4rem 0 3rem; font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif; font-size: 0.85rem; color: var(--soft); }
.top nav a { text-decoration: none; }
.top nav a:first-child { font-weight: 600; letter-spacing: 0.02em; color: var(--ink); }

.head h1 { font-size: clamp(2rem, 1.6rem + 1.6vw, 2.8rem); line-height: 1.1; font-weight: 600; letter-spacing: -0.01em; margin: 0 0 0.6rem; }
.lede { font-size: 1.2em; line-height: 1.45; color: var(--soft); margin: 0 0 0.8rem; }
.meta { font-family: ui-sans-serif, system-ui, sans-serif; font-size: 0.8rem; color: var(--soft); margin: 0 0 2.5rem; }
.status { margin-left: 0.6rem; padding: 0.1em 0.5em; border: 1px solid var(--line); border-radius: 1em; }

h2 { font-size: 1.45em; line-height: 1.2; font-weight: 600; margin: 3rem 0 0.8rem; letter-spacing: -0.005em; }
h3 { font-size: 1.1em; font-weight: 600; margin: 2rem 0 0.5rem; }
p, ul, ol { margin: 0 0 1.1rem; }
li { margin-bottom: 0.35rem; }
li > p { margin-bottom: 0.4rem; }
strong { font-weight: 600; }
hr { border: 0; border-top: 1px solid var(--line); margin: 3rem 0; }
blockquote { margin: 1.5rem 0; padding-left: 1rem; border-left: 2px solid var(--line); color: var(--soft); font-style: italic; }
code { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; font-size: 0.9em; background: var(--wash); padding: 0.1em 0.35em; border-radius: 3px; }
pre { background: var(--wash); padding: 1rem; overflow-x: auto; border-radius: 4px; }
pre code { background: none; padding: 0; }

/* The explanation boxes. Markdown: !!! plain "In plain words" / rule / example / watch */
.admonition { margin: 1.6rem 0; padding: 0.9rem 1.1rem; border-left: 3px solid var(--ink); background: var(--wash); border-radius: 0 4px 4px 0; }
.admonition > :last-child { margin-bottom: 0; }
.admonition-title { font-family: ui-sans-serif, system-ui, sans-serif; font-size: 0.75rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--soft); margin: 0 0 0.4rem; }
.admonition.plain { border-color: var(--accent); background: transparent; padding-top: 0.2rem; padding-bottom: 0.2rem; }
.admonition.plain .admonition-title { color: var(--accent); }
.admonition.plain p { font-size: 1.08em; }
.admonition.rule { font-size: 0.95em; }
.admonition.example { border-color: var(--line); }
.admonition.watch { border-color: var(--accent); }

table { border-collapse: collapse; width: 100%; margin: 1.4rem 0 1.8rem; font-size: 0.92em; line-height: 1.4; }
th, td { padding: 0.5rem 0.6rem 0.5rem 0; vertical-align: top; text-align: left; border-bottom: 1px solid var(--line); }
th { font-family: ui-sans-serif, system-ui, sans-serif; font-size: 0.75rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--soft); }
td[style*="right"], th[style*="right"] { font-variant-numeric: tabular-nums; white-space: nowrap; }
tr.total td, td strong { font-weight: 600; }
.wide { overflow-x: auto; }

details { margin: 1.2rem 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 0.6rem 0; }
details + details { border-top: 0; margin-top: -1.2rem; }
summary { cursor: pointer; font-weight: 600; list-style: none; padding: 0.3rem 0; }
summary::-webkit-details-marker { display: none; }
summary::before { content: "+"; display: inline-block; width: 1.3em; color: var(--accent); font-weight: 400; }
details[open] summary::before { content: "−"; }
details > :not(summary) { margin-left: 1.3em; }

.toc { font-family: ui-sans-serif, system-ui, sans-serif; font-size: 0.85rem; margin: 0 0 3rem; padding: 1rem 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.toc p { margin: 0 0 0.4rem; font-weight: 600; color: var(--soft); font-size: 0.75rem; letter-spacing: 0.06em; text-transform: uppercase; }
.toc ul { list-style: none; margin: 0; padding: 0; columns: 2; column-gap: 2rem; }
.toc li { margin: 0 0 0.3rem; break-inside: avoid; }
.toc a { text-decoration: none; }
.toc a:hover { color: var(--accent); }

.studies, .pages ol { list-style: none; padding: 0; margin: 0; }
.studies li, .pages li { padding: 1.2rem 0; border-top: 1px solid var(--line); }
.studies li:last-child, .pages li:last-child { border-bottom: 1px solid var(--line); }
.studies a, .pages a { text-decoration: none; font-size: 1.15em; font-weight: 600; }
.studies a:hover, .pages a:hover { color: var(--accent); }
.studies span, .pages span { display: block; color: var(--soft); margin-top: 0.2rem; }
.studies time { display: block; font-family: ui-sans-serif, system-ui, sans-serif; font-size: 0.78rem; color: var(--soft); margin-top: 0.4rem; }
.pages { margin-top: 3rem; }

.footnote { margin-top: 3rem; padding-top: 1rem; border-top: 1px solid var(--line); font-size: 0.88em; color: var(--soft); }
.footnote ol { padding-left: 1.2em; }
.footnote-ref { text-decoration: none; font-size: 0.75em; vertical-align: super; color: var(--accent); }
.footnote-backref { text-decoration: none; }
footer { margin-top: 5rem; font-family: ui-sans-serif, system-ui, sans-serif; font-size: 0.8rem; color: var(--soft); }
footer a { text-decoration: none; color: var(--accent); }

@media (max-width: 40rem) { .toc ul { columns: 1; } table { font-size: 0.85em; } th, td { padding-right: 0.4rem; } }
@media print { .top, .toc, footer { display: none; } body { font-size: 11pt; } details { border: 0; } details > * { display: block; } }