:root {
  --bg: #fdfdfa;
  --fg: #1c1c1a;
  --muted: #6b6b66;
  --accent: #9a4a1e;
  --rule: #e4e2da;
  --code-bg: #f2f0ea;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #191917;
    --fg: #e6e4dd;
    --muted: #96948c;
    --accent: #e08a52;
    --rule: #33322e;
    --code-bg: #232320;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0 auto;
  padding: 1.5rem 1.25rem 4rem;
  max-width: 42rem;
  background: var(--bg);
  color: var(--fg);
  font-family: Charter, Georgia, 'Times New Roman', serif;
  font-size: 1.125rem;
  line-height: 1.65;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 0.75rem;
  margin-bottom: 2.5rem;
  font-family: system-ui, sans-serif;
}
.site-name { font-weight: 700; color: var(--fg); }
.site-header nav a { margin-left: 1.25rem; font-size: 0.95rem; }
.site-header nav .lang-switch { margin-left: 1.25rem; font-size: 0.8rem; color: var(--muted); letter-spacing: 0.03em; }
.site-header nav .lang-switch a { margin-left: 0; }

h1 { font-size: 1.9rem; line-height: 1.25; margin: 0 0 0.35rem; }
h2 { font-size: 1.35rem; margin-top: 2.25rem; }
h3 { font-size: 1.1rem; }

.meta, .essay-list time {
  color: var(--muted);
  font-family: system-ui, sans-serif;
  font-size: 0.85rem;
}
.essay-header { margin-bottom: 2rem; }

.essay-list { list-style: none; padding: 0; }
.essay-list li { margin-bottom: 1.4rem; }
.essay-list li > a { font-size: 1.15rem; font-weight: 600; margin-right: 0.5rem; }
.essay-list .blurb { margin: 0.15rem 0 0; color: var(--muted); font-size: 0.95rem; }

blockquote {
  margin: 1.5rem 0;
  padding-left: 1rem;
  border-left: 3px solid var(--accent);
  color: var(--muted);
}

hr { border: none; border-top: 1px solid var(--rule); margin: 2.5rem auto; width: 40%; }

code {
  font-family: ui-monospace, 'SF Mono', Menlo, monospace;
  font-size: 0.85em;
  background: var(--code-bg);
  padding: 0.1em 0.35em;
  border-radius: 3px;
}
pre { background: var(--code-bg); padding: 1rem; border-radius: 6px; overflow-x: auto; }
pre code { background: none; padding: 0; }

img { max-width: 100%; height: auto; }

.site-footer {
  margin-top: 4rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-family: system-ui, sans-serif;
  font-size: 0.85rem;
}

/* --- series --- */
.series-tag {
  font-family: system-ui, sans-serif;
  font-size: 0.8rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 0.4rem;
}
.series-list { list-style: none; padding: 0; counter-reset: part; }
.series-list li { margin-bottom: 1.5rem; }
.series-list .part {
  display: block;
  font-family: system-ui, sans-serif;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--accent);
  margin-bottom: 0.15rem;
}
.series-list li > a { font-size: 1.2rem; font-weight: 600; }
.series-list .blurb { margin: 0.2rem 0 0; color: var(--muted); font-size: 0.95rem; }

.coming { margin-top: 2.5rem; padding-top: 1rem; border-top: 1px dashed var(--rule); }
.coming h2 { font-size: 1rem; color: var(--muted); font-family: system-ui, sans-serif; }
.coming ul { color: var(--muted); font-size: 0.95rem; }

.series-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule);
  font-family: system-ui, sans-serif;
  font-size: 0.9rem;
}
.series-nav .next { text-align: right; margin-left: auto; }
.series-nav .dir { display: block; color: var(--muted); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.03em; }

/* point-in-time banner (e.g. a dated security review) */
.top-note {
  margin: 0 0 2rem;
  padding: 0.9rem 1.1rem;
  background: var(--code-bg);
  border-left: 3px solid var(--accent);
  border-radius: 4px;
  font-family: system-ui, sans-serif;
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--fg);
}
.top-note strong { font-weight: 600; }

.epistemic-note {
  margin: 2.5rem 0 0;
  padding: 0.9rem 1.1rem;
  background: var(--code-bg);
  border-left: 3px solid var(--accent);
  border-radius: 4px;
  font-family: system-ui, sans-serif;
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--fg);
}
.epistemic-note p { margin: 0; }
.epistemic-note strong { font-weight: 600; }