:root {
  color-scheme: dark;
  --bg: #090a0d;
  --panel: #151821;
  --panel-2: #1f2430;
  --line: #343b4b;
  --text: #f5f7fb;
  --muted: #aab2c4;
  --blue: #55c7ff;
  --gold: #f0b14a;
  --green: #70e09d;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 16% 0%, rgba(85, 199, 255, 0.12), transparent 28rem),
    radial-gradient(circle at 88% 4%, rgba(240, 177, 74, 0.1), transparent 24rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a { color: var(--blue); }
a:hover { color: #9ee5ff; }

.site-shell {
  width: min(1080px, 100%);
  margin: 0 auto;
  padding: 1rem;
}

.site-header {
  display: grid;
  gap: 0.8rem;
  border-bottom: 1px solid var(--line);
  padding: 0.35rem 0 1rem;
}

.brand-link {
  color: var(--text);
  font-size: 1.55rem;
  font-weight: 900;
  text-decoration: none;
  text-transform: uppercase;
}

.brand-link span { color: var(--blue); }

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.site-nav a {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.45rem 0.65rem;
  background: #10141c;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 750;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  border-color: var(--blue);
  color: var(--blue);
}

.article-header {
  display: grid;
  gap: 0.75rem;
  max-width: 820px;
  padding: 2.25rem 0 1.25rem;
}

.eyebrow {
  margin: 0;
  color: var(--gold);
  font-size: 0.78rem;
  font-weight: 850;
  text-transform: uppercase;
}

h1, h2, h3 { letter-spacing: 0; }
h1 {
  margin: 0;
  font-size: clamp(2.1rem, 8vw, 4.2rem);
  line-height: 1;
}

.dek {
  margin: 0;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.65;
}

.article-layout {
  display: grid;
  gap: 2rem;
}

.toc {
  align-self: start;
  border-left: 2px solid var(--blue);
  padding-left: 0.85rem;
}

.toc strong { display: block; margin-bottom: 0.5rem; }
.toc a { display: block; margin: 0.35rem 0; color: var(--muted); }

.article-body {
  min-width: 0;
  max-width: 780px;
}

.article-body section {
  border-top: 1px solid var(--line);
  padding: 1.45rem 0;
}

.article-body section:first-child { border-top: 0; padding-top: 0; }
.article-body h2 { margin: 0 0 0.65rem; font-size: 1.55rem; }
.article-body h3 { margin: 1.2rem 0 0.45rem; font-size: 1.08rem; }
.article-body p,
.article-body li { color: #d7dbe5; line-height: 1.7; }
.article-body p { margin: 0.6rem 0; }
.article-body ul,
.article-body ol { padding-left: 1.35rem; }
.article-body li + li { margin-top: 0.35rem; }

.callout {
  margin: 1rem 0;
  border-left: 3px solid var(--gold);
  padding: 0.75rem 0.9rem;
  background: rgba(240, 177, 74, 0.08);
}

.callout strong { color: var(--gold); }

.data-table {
  width: 100%;
  margin: 1rem 0;
  border-collapse: collapse;
}

.data-table th,
.data-table td {
  border: 1px solid var(--line);
  padding: 0.65rem;
  text-align: left;
  vertical-align: top;
}

.data-table th { background: var(--panel-2); color: var(--blue); }
.data-table td { color: #d7dbe5; }

.next-links {
  display: grid;
  gap: 0.75rem;
  border-top: 1px solid var(--line);
  margin-top: 1rem;
  padding-top: 1.25rem;
}

.next-links a {
  border-left: 2px solid var(--green);
  padding-left: 0.75rem;
  font-weight: 750;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  border-top: 1px solid var(--line);
  margin-top: 2rem;
  padding: 1.2rem 0;
  color: var(--muted);
  font-size: 0.84rem;
}

.site-footer a { color: var(--muted); }

@media (min-width: 860px) {
  .article-layout { grid-template-columns: 210px minmax(0, 1fr); }
  .toc { position: sticky; top: 1rem; }
}