:root {
  --bg: #070708;
  --bg-elev: #101014;
  --ink: #efece4;
  --muted: #9b978c;
  --dim: #6b675f;
  --line: #23232a;
  --lime: #e3ff3a;
  --lime-ink: #0b0c04;
  --link: #e3ff3a;
  --max: 42rem;
  --wide: 72rem;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Source Serif 4", "Iowan Old Style", "Palatino Linotype", Palatino, serif;
  font-size: 1.125rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--link); text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--lime); outline-offset: 3px; }

.skip {
  position: absolute;
  left: 0.75rem;
  top: -3rem;
  background: var(--lime);
  color: var(--lime-ink);
  padding: 0.4rem 0.7rem;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 600;
  text-decoration: none;
}
.skip:focus { top: 0.75rem; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.4rem;
  background: rgba(7, 7, 8, 0.88);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}
.wordmark {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.03em;
  color: var(--ink);
  text-decoration: none;
}
.wordmark span {
  color: var(--lime);
  font-weight: 500;
  margin-left: 0.35rem;
}
.site-header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.site-header nav a {
  color: var(--muted);
  text-decoration: none;
}
.site-header nav a:hover,
.site-header nav a[aria-current="page"] { color: var(--ink); }

.wrap {
  width: min(var(--wide), calc(100% - 2.4rem));
  margin: 0 auto;
}
.article-wrap {
  width: min(var(--max), calc(100% - 2.4rem));
  margin: 0 auto;
  padding: 2.6rem 0 4rem;
}
.index-wrap {
  width: min(var(--wide), calc(100% - 2.4rem));
  margin: 0 auto;
  padding: 2.6rem 0 4.5rem;
}

.eyebrow {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lime);
  margin: 0 0 0.7rem;
}
h1 {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 1.05;
  font-size: clamp(2rem, 5vw, 3.15rem);
  margin: 0 0 0.85rem;
}
.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
  margin: 0 0 2rem;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.72rem;
  color: var(--muted);
}
.chip {
  display: inline-block;
  border: 1px solid var(--line);
  padding: 0.2rem 0.5rem;
  color: var(--ink);
  text-decoration: none;
  background: var(--bg-elev);
}
.chip:hover { border-color: var(--lime); }

.prose :is(h2, h3) {
  font-family: "Space Grotesk", sans-serif;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin: 2.2rem 0 0.7rem;
}
.prose h2 { font-size: 1.45rem; }
.prose h3 { font-size: 1.15rem; }
.prose p { margin: 0 0 1rem; }
.prose .lede {
  font-size: 1.22rem;
  line-height: 1.55;
  color: #f5f2ea;
}
.prose ul, .prose ol { padding-left: 1.2rem; margin: 0 0 1.1rem; }
.prose li { margin: 0.25rem 0; }
.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  margin: 1.2rem 0 1.5rem;
}
.prose th, .prose td {
  border: 1px solid var(--line);
  padding: 0.45rem 0.6rem;
  text-align: left;
  vertical-align: top;
}
.prose th {
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: var(--bg-elev);
}
.prose blockquote {
  margin: 1.2rem 0;
  padding: 0.2rem 0 0.2rem 1rem;
  border-left: 2px solid var(--lime);
  color: var(--muted);
}
.prose hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 2rem 0;
}
.prose strong { font-weight: 650; }

.related, .faq {
  margin-top: 2.8rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--line);
}
.related h2, .faq h2 {
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.15rem;
  letter-spacing: -0.03em;
  margin: 0 0 0.8rem;
}
.related ul { list-style: none; padding: 0; margin: 0; }
.related li { border-top: 1px solid var(--line); }
.related a {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem 0;
  color: var(--ink);
  text-decoration: none;
  font-family: "Space Grotesk", sans-serif;
}
.related a:hover { color: var(--lime); }
.related .sec {
  color: var(--dim);
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

details.faq-item {
  border-top: 1px solid var(--line);
}
details.faq-item summary {
  cursor: pointer;
  padding: 0.85rem 0;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 600;
  list-style: none;
}
details.faq-item summary::-webkit-details-marker { display: none; }
details.faq-item summary::after {
  content: "+";
  float: right;
  color: var(--lime);
  font-weight: 500;
}
details.faq-item[open] summary::after { content: "–"; }
details.faq-item p {
  margin: 0 0 1rem;
  color: var(--muted);
}

.hero {
  padding: 3.2rem 0 2.2rem;
  border-bottom: 1px solid var(--line);
}
.hero p {
  max-width: 40rem;
  color: var(--muted);
  margin: 0.6rem 0 0;
  font-size: 1.2rem;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16.5rem, 1fr));
  gap: 0.75rem;
  margin: 0;
}
.card {
  display: block;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  padding: 1.1rem 1.15rem 1.2rem;
  text-decoration: none;
  color: inherit;
  min-height: 8.5rem;
}
.card:hover { border-color: var(--lime); }
.card .kicker {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--lime);
  margin: 0 0 0.45rem;
}
.card h3 {
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.15rem;
  letter-spacing: -0.03em;
  margin: 0 0 0.4rem;
  color: var(--ink);
}
.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
}

.section-block { margin-top: 2.8rem; }
.section-block h2 {
  font-family: "Space Grotesk", sans-serif;
  letter-spacing: -0.03em;
  font-size: 1.35rem;
  margin: 0 0 0.9rem;
}
.az-letter {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  color: var(--lime);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  margin: 1.6rem 0 0.4rem;
}
.az-list { list-style: none; padding: 0; margin: 0; }
.az-list li { border-top: 1px solid var(--line); }
.az-list a {
  display: grid;
  grid-template-columns: minmax(10rem, 22rem) 1fr;
  gap: 1rem;
  padding: 0.65rem 0;
  color: var(--ink);
  text-decoration: none;
  font-family: "Space Grotesk", sans-serif;
}
.az-list a:hover { color: var(--lime); }
.az-list .def {
  color: var(--muted);
  font-family: "Source Serif 4", serif;
  font-size: 0.98rem;
}
.plain-list { list-style: none; padding: 0; margin: 0; }
.plain-list li { border-top: 1px solid var(--line); }
.plain-list a {
  display: block;
  padding: 0.75rem 0;
  color: var(--ink);
  text-decoration: none;
  font-family: "Space Grotesk", sans-serif;
}
.plain-list a:hover { color: var(--lime); }
.plain-list .sub {
  display: block;
  color: var(--muted);
  font-family: "Source Serif 4", serif;
  font-size: 0.95rem;
  font-weight: 400;
  margin-top: 0.2rem;
}

.site-footer {
  background: var(--lime);
  color: var(--lime-ink);
  padding: 2.6rem 1.4rem 2.2rem;
}
.site-footer .wrap { width: min(42rem, 100%); }
.site-footer .kicker {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin: 0 0 0.45rem;
}
.site-footer h2 {
  font-family: "Space Grotesk", sans-serif;
  letter-spacing: -0.04em;
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  margin: 0 0 1rem;
  line-height: 1.1;
}
.cta {
  display: inline-block;
  background: var(--lime-ink);
  color: var(--lime);
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  text-decoration: none;
  padding: 0.7rem 1rem;
}
.cta:hover { text-decoration: none; filter: brightness(1.1); }
.fine {
  margin: 1.3rem 0 0;
  font-size: 0.85rem;
  line-height: 1.45;
  max-width: 36rem;
  opacity: 0.8;
}

@media (max-width: 720px) {
  .az-list a { grid-template-columns: 1fr; gap: 0.15rem; }
  .site-header { flex-wrap: wrap; }
}

.related-jt {
  margin: 1.8rem 0 0;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.98rem;
}
.related-jt a { color: var(--ink); }
.byline {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.72rem;
  color: var(--muted);
}
.compare-wrap {
  width: min(var(--wide), calc(100% - 2.4rem));
  margin: 0 auto;
  padding: 2.6rem 0 4rem;
}
.compare-wrap .prose table { font-size: 0.92rem; }
.this-site {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--lime);
  margin-left: 0.4rem;
}