/* The Empty Field That Wasn't — article page.
 *
 * Layout: a single text column with a right margin channel for
 * sidenotes on wide screens. Below the wide breakpoint the margin
 * channel disappears and footnote markers expand their note inline
 * (see sidenotes.js). With JavaScript disabled, the Pandoc endnote
 * section at the bottom serves all widths, with bidirectional links.
 */

:root {
  --text: #1c1c1c;
  --muted: #5a5a5a;
  --accent: #8b1a1a;
  --rule: #d8d2c7;
  --paper: #fbfaf7;
  --note-bg: #f3efe7;
  --body-width: 42rem;
  --margin-width: 19rem;
  --margin-gap: 2.5rem;
}

* { box-sizing: border-box; }

html { font-size: 17px; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font-family: Charter, "Bitstream Charter", "Source Serif Pro", Georgia, serif;
  line-height: 1.55;
  text-rendering: optimizeLegibility;
}

main {
  max-width: calc(var(--body-width) + var(--margin-gap) + var(--margin-width));
  margin: 0 auto;
  padding: 0 1.25rem 4rem;
}

article { max-width: var(--body-width); }

/* ── Site chrome ─────────────────────────────────────────────────── */

.site-nav {
  max-width: calc(var(--body-width) + var(--margin-gap) + var(--margin-width));
  margin: 0 auto;
  padding: 0.8rem 1.25rem;
  border-bottom: 1px solid var(--rule);
  font-family: -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0.02em;
}
.site-nav a { color: var(--muted); text-decoration: none; margin-right: 1.2rem; }
.site-nav a:hover { color: var(--accent); }
.nav-version {
  color: var(--accent);
  font-weight: 600;
  margin-right: 1.2rem;
  text-transform: uppercase;
}

.site-footer {
  max-width: var(--body-width);
  margin-top: 3rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--rule);
  font-size: 0.82rem;
  color: var(--muted);
}

/* ── Typography ──────────────────────────────────────────────────── */

h1 {
  font-size: 1.9rem;
  line-height: 1.2;
  margin: 2.2rem 0 0.8rem;
  letter-spacing: -0.01em;
}

/* Subtitle: the paragraph straight after the H1. */
h1 + p {
  font-size: 1.15rem;
  color: var(--muted);
  font-style: italic;
  margin-top: 0;
}

h2 {
  font-size: 1.25rem;
  margin: 2.6rem 0 0.6rem;
  letter-spacing: -0.005em;
}

p { margin: 0 0 1rem; }

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

blockquote {
  margin: 1.6rem 0;
  padding: 0.9rem 1.1rem;
  background: var(--note-bg);
  border-left: 3px solid var(--accent);
  font-size: 0.9rem;
}
blockquote p { margin: 0; }

ul { padding-left: 1.4rem; }
li { margin-bottom: 0.45rem; }

img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 1.6rem auto;
  border: 1px solid var(--rule);
  background: #fff;
  padding: 0.4rem;
}

code {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.84em;
  background: var(--note-bg);
  padding: 0.05em 0.25em;
  border-radius: 3px;
}

/* ── Footnote markers ────────────────────────────────────────────── */

a.footnote-ref {
  text-decoration: none;
  font-weight: 600;
  padding: 0 0.12em;
}

/* ── Sidenotes (created by sidenotes.js from the endnote content) ── */

.sidenote { display: none; }

@media (min-width: 1180px) {
  .sidenotes-on .sidenote {
    display: block;
    float: right;
    clear: right;
    width: var(--margin-width);
    margin-right: calc(-1 * (var(--margin-width) + var(--margin-gap)));
    margin-bottom: 0.9rem;
    font-size: 0.76rem;
    line-height: 1.45;
    color: var(--muted);
    font-family: -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  }
  .sidenote .sn-num {
    font-weight: 700;
    color: var(--accent);
  }
  .sidenote.sn-target {
    background: var(--note-bg);
    outline: 6px solid var(--note-bg);
  }
  /* The endnote apparatus is redundant when sidenotes are shown. */
  .sidenotes-on #notes,
  .sidenotes-on #notes + p,
  .sidenotes-on #footnotes { display: none; }
}

@media (max-width: 1179.98px) {
  .sidenotes-on .sidenote.expanded {
    display: block;
    margin: 0.7rem 0 1rem;
    padding: 0.7rem 0.9rem;
    background: var(--note-bg);
    border-left: 3px solid var(--accent);
    font-size: 0.82rem;
    line-height: 1.5;
    color: var(--text);
  }
  .sidenotes-on .sidenote .sn-num { font-weight: 700; color: var(--accent); }
  /* Inline expansion replaces the jump-to-endnotes behavior. */
  .sidenotes-on #notes,
  .sidenotes-on #notes + p,
  .sidenotes-on #footnotes { display: none; }
}

/* ── Endnotes (no-JS fallback and print) ─────────────────────────── */

#footnotes { font-size: 0.85rem; color: var(--muted); }
#footnotes hr { border: none; border-top: 1px solid var(--rule); }
#footnotes li { margin-bottom: 0.7rem; }
#footnotes li:target {
  background: var(--note-bg);
  outline: 6px solid var(--note-bg);
}
a.footnote-back { text-decoration: none; margin-left: 0.3em; }

@media print {
  .site-nav { display: none; }
  .sidenote { display: none !important; }
  #notes, #notes + p, #footnotes { display: block !important; }
  body { background: #fff; }
}