/* MSO Signal: dense technical research journal.
   No webfonts, no JS: every page must stay < 60KB and render in one paint. */
:root {
  --bg: #fbfaf7;
  --ink: #1a1c1e;
  --ink-soft: #4a4f54;
  --ink-faint: #8a8f94;
  --accent: #0b5540;
  --accent-soft: #e7efec;
  --rule: #d9d6cf;
  --card: #ffffff;
  --mono-bg: #f1efe9;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181a;
    --ink: #e8e6e1;
    --ink-soft: #b0aea8;
    --ink-faint: #7d7b76;
    --accent: #5fb89a;
    --accent-soft: #1e2b27;
    --rule: #33363a;
    --card: #1d2023;
    --mono-bg: #22252a;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.65 Georgia, 'Times New Roman', serif;
}
.wrap { max-width: 880px; margin: 0 auto; padding: 0 20px; }
a { color: var(--accent); }

/* Masthead */
.masthead { border-bottom: 3px double var(--rule); padding: 22px 0 14px; }
.masthead .brand {
  font: 700 30px/1.1 Georgia, serif;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.5px;
  display: inline-block;
}
.masthead .tagline {
  display: block;
  font: 13px/1.4 ui-monospace, Consolas, monospace;
  color: var(--ink-faint);
  margin-top: 2px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.masthead nav { margin-top: 12px; }
.masthead nav a {
  font: 600 13px/1 ui-monospace, Consolas, monospace;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  text-decoration: none;
  margin-right: 22px;
}
.masthead nav a:hover { color: var(--accent); }

/* Index list */
.paper-list { list-style: none; padding: 0; margin: 0; }
.paper-list li { border-bottom: 1px solid var(--rule); padding: 22px 0; }
.paper-list h2 { margin: 0 0 6px; font-size: 22px; line-height: 1.3; }
.paper-list h2 a { color: var(--ink); text-decoration: none; }
.paper-list h2 a:hover { color: var(--accent); }
.paper-list .abstract { margin: 6px 0 8px; color: var(--ink-soft); }
.kicker {
  font: 600 12px/1 ui-monospace, Consolas, monospace;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
}
.meta-line {
  font: 12px/1.5 ui-monospace, Consolas, monospace;
  color: var(--ink-faint);
}
.meta-line a { color: var(--ink-faint); }

/* Article */
article h1 { font-size: 34px; line-height: 1.2; letter-spacing: -0.5px; margin: 26px 0 8px; }
article .standfirst { font-size: 19px; line-height: 1.55; color: var(--ink-soft); margin: 14px 0 6px; }
article h2 { font-size: 24px; margin-top: 42px; border-bottom: 1px solid var(--rule); padding-bottom: 6px; }
article h3 { font-size: 19px; margin-top: 30px; }
article img { max-width: 100%; }
article blockquote {
  margin: 20px 0; padding: 4px 20px;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  color: var(--ink-soft);
}
article code {
  font: 14px ui-monospace, Consolas, monospace;
  background: var(--mono-bg);
  padding: 1px 5px; border-radius: 3px;
}
article pre { background: var(--mono-bg); padding: 14px 16px; overflow-x: auto; border-radius: 4px; }
article pre code { background: none; padding: 0; }

/* Tables: the figures ARE the product; make them read like a terminal report */
.table-scroll { overflow-x: auto; margin: 22px 0; }
article table {
  border-collapse: collapse; width: 100%;
  font: 14px/1.5 ui-monospace, Consolas, monospace;
  background: var(--card);
}
article th {
  text-align: left; border-bottom: 2px solid var(--ink);
  padding: 8px 12px; font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em;
}
article td { border-bottom: 1px solid var(--rule); padding: 8px 12px; vertical-align: top; }
article tr:last-child td { border-bottom: 2px solid var(--ink); }

hr { border: 0; border-top: 3px double var(--rule); margin: 40px 0; }

/* Author / CTA block */
.author-block {
  margin: 48px 0 20px; padding: 20px 22px;
  border: 1px solid var(--rule); border-left: 4px solid var(--accent);
  background: var(--card);
}
.author-block p { margin: 6px 0; }
.author-block .name { font-weight: 700; }

/* Related */
.related { margin-top: 34px; }
.related h2 { font-size: 16px; text-transform: uppercase; letter-spacing: 0.06em; border: 0; }
.related ul { padding-left: 20px; }

footer { border-top: 3px double var(--rule); margin-top: 60px; padding: 18px 0 40px; }
footer p { font: 13px/1.6 ui-monospace, Consolas, monospace; color: var(--ink-faint); margin: 6px 0; }
footer a { color: var(--ink-soft); }

@media (max-width: 600px) {
  body { font-size: 15px; }
  article h1 { font-size: 27px; }
  .masthead .brand { font-size: 24px; }
}