:root {
  --bg: #0b0c0f;
  --fg: #e8e6e3;
  --muted: #9a968f;
  --line: #2a2c33;
  --accent: #c8f542;
  --card: #12141a;
  --max: 42rem;
  --wide: 56rem;
}
* { box-sizing: border-box; }
html { color-scheme: dark; }
body {
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.55;
  font-size: 1.05rem;
}
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { text-decoration: none; }
header, main, footer { width: min(100% - 2rem, var(--wide)); margin-inline: auto; }
header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: 1.5rem 0 1rem;
  border-bottom: 1px solid var(--line);
}
.mark { font-weight: 650; letter-spacing: 0.02em; color: var(--fg); text-decoration: none; }
nav { display: flex; flex-wrap: wrap; gap: 1rem; }
nav a { color: var(--muted); text-decoration: none; font-size: 0.95rem; }
nav a:hover, nav a[aria-current="page"] { color: var(--fg); }
.hero { padding: 4rem 0 2.5rem; max-width: var(--max); }
.hero h1 {
  font-family: "IBM Plex Serif", Georgia, serif;
  font-weight: 550;
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.15;
  margin: 0 0 1rem;
  letter-spacing: -0.02em;
}
.hero p { color: var(--muted); margin: 0 0 1rem; max-width: 38rem; }
.cta {
  display: inline-block;
  margin-top: 0.75rem;
  padding: 0.65rem 1rem;
  border: 1px solid var(--accent);
  color: var(--bg);
  background: var(--accent);
  text-decoration: none;
  font-weight: 600;
}
.cta:hover { filter: brightness(1.05); }
.cta.ghost {
  background: transparent;
  color: var(--fg);
  border-color: var(--line);
  margin-left: 0.5rem;
}
section { padding: 2rem 0; border-top: 1px solid var(--line); }
section h2 {
  font-family: "IBM Plex Serif", Georgia, serif;
  font-size: 1.45rem;
  font-weight: 550;
  margin: 0 0 1rem;
}
.lede { color: var(--muted); max-width: var(--max); margin: 0 0 1.25rem; }
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr));
  gap: 0.85rem;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 1rem 1.05rem;
  border-radius: 0.35rem;
}
.card h3 { margin: 0 0 0.35rem; font-size: 1.05rem; }
.card p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.meta { margin-top: 0.65rem; color: var(--muted); font-size: 0.82rem; }
ul.clean { list-style: none; padding: 0; margin: 0; }
ul.clean li {
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--line);
}
ul.clean li:last-child { border-bottom: 0; }
ul.clean strong { display: block; margin-bottom: 0.2rem; }
footer {
  padding: 2rem 0 3rem;
  color: var(--muted);
  font-size: 0.9rem;
  border-top: 1px solid var(--line);
}
.prose { max-width: var(--max); padding: 2.5rem 0 3rem; }
.prose h1 {
  font-family: "IBM Plex Serif", Georgia, serif;
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  line-height: 1.2;
  margin: 0 0 0.5rem;
}
.prose .byline { color: var(--muted); margin: 0 0 1.75rem; font-size: 0.95rem; }
.prose h2 { font-size: 1.2rem; margin: 1.75rem 0 0.5rem; }
.prose p, .prose li { color: #d2cfc9; }
.rule {
  margin-top: 2rem;
  padding: 1rem 1.1rem;
  border-left: 3px solid var(--accent);
  background: var(--card);
}
code, .mono { font-family: "IBM Plex Mono", ui-monospace, monospace; font-size: 0.92em; }