:root {
  --bg: #0f1417;
  --bg-raised: #151b1f;
  --line: #2b353a;
  --text: #e7e5df;
  --muted: #a3adb1;
  --accent: #16bfa8;
  --accent-strong: #3dd8c2;
  --accent-2: #d1a85c;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  line-height: 1.65;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-attachment: fixed;
  background-position: center top;
  background-size: 48px 48px;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 10;
  padding: 0.65rem 0.9rem;
  border-radius: 3px;
  background: var(--text);
  color: var(--bg);
  transform: translateY(-160%);
  transition: transform 0.2s;
}
.skip-link:focus { transform: translateY(0); }

a:focus-visible {
  outline: 3px solid var(--accent-2);
  outline-offset: 3px;
}

.veil {
  min-height: 100vh;
  background: radial-gradient(ellipse at top, rgba(15,20,23,0.2) 0%, var(--bg) 65%);
}

.top,
main {
  width: min(100% - 3rem, 760px);
  margin: 0 auto;
}
.top { padding-top: 2rem; }
main { padding: 1.5rem 0 6rem; }

.back,
.article-end a,
.reference-list a,
.companion-link {
  color: var(--accent-strong);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}
.back {
  color: var(--muted);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  text-decoration: none;
}
.back:hover { color: var(--accent-strong); }

.eyebrow {
  margin: 2rem 0 0.9rem;
  color: var(--accent-strong);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
h1,
h2 {
  color: #fff;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
}
h1 {
  margin: 0 0 0.9rem;
  font-size: clamp(2rem, 7vw, 2.65rem);
  line-height: 1.12;
}
.byline,
.article-meta {
  color: var(--muted);
  font-size: 0.92rem;
}
.byline { margin: 0 0 0.35rem; }
.byline a { color: var(--accent-strong); }
.article-meta { margin: 0 0 2.5rem; }

h2 {
  margin: 2.75rem 0 0.75rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  font-size: 1.35rem;
}
h3 {
  margin: 1.6rem 0 0.6rem;
  color: var(--accent-strong);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 1rem;
  font-weight: 500;
}
p {
  margin: 0 0 1rem;
  color: #d9d7d0;
  font-size: 1.02rem;
}
ul {
  margin: 0 0 1.25rem;
  padding-left: 0;
  list-style: none;
}
li {
  position: relative;
  margin-bottom: 0.55rem;
  padding-left: 1.4rem;
  color: #d9d7d0;
}
ul li::before {
  position: absolute;
  left: 0;
  color: var(--accent-2);
  content: '—';
}

.callout {
  margin: 1.5rem 0;
  padding: 1rem 1.25rem;
  border-left: 2px solid var(--accent);
  border-radius: 2px;
  background: var(--bg-raised);
}
.callout p {
  margin: 0;
  color: var(--muted);
  font-size: 0.94rem;
  font-style: italic;
}

.reference-list {
  margin: 0 0 1.25rem;
  padding-left: 1.35rem;
}
.reference-list li {
  padding-left: 0.25rem;
  font-size: 0.92rem;
}
.reference-list li::before { content: none; }

.article-end {
  margin-top: 3.5rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.95rem;
}
.article-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1.5rem;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.82rem;
}
.article-nav a { color: var(--accent-strong); }

::selection {
  background: var(--accent);
  color: var(--bg);
}

@media (max-width: 520px) {
  .top,
  main { width: min(100% - 2rem, 760px); }
  .article-nav { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}


/* Bilingual long-form articles */
.top { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.article-languages { display: flex; gap: 0.4rem; font-family: 'IBM Plex Mono', monospace; font-size: 0.78rem; }
.article-languages a { padding: 0.35rem 0.55rem; border: 1px solid var(--line); border-radius: 3px; color: var(--muted); text-decoration: none; }
.article-languages a:hover, .article-languages a[aria-current='page'] { border-color: var(--accent); color: var(--accent-strong); }
.article-toc { margin: 0 0 2.5rem; padding: 1rem 1.25rem; border: 1px solid var(--line); border-radius: 4px; background: var(--bg-raised); }
.article-toc summary { cursor: pointer; color: var(--accent-strong); font-family: 'IBM Plex Mono', monospace; font-size: 0.85rem; }
.article-toc ol { margin: 1rem 0 0; padding-left: 1.25rem; }
.article-toc li { padding-left: 0.2rem; font-size: 0.88rem; }
.article-toc a, .article-body a { color: var(--accent-strong); text-underline-offset: 0.2em; }
.citation { white-space: nowrap; font-size: 0.84em; }
.citation a { text-decoration: none; }
.table-scroll { overflow-x: auto; margin: 1.5rem 0; }
.table-scroll:focus-visible { outline: 3px solid var(--accent-2); outline-offset: 3px; }
table { width: 100%; border-collapse: collapse; min-width: 560px; font-size: 0.9rem; }
th, td { padding: 0.75rem; border: 1px solid var(--line); text-align: left; vertical-align: top; }
thead th { color: var(--accent-strong); background: var(--bg-raised); }
tbody th { color: var(--text); font-weight: 500; }
.numeric { text-align: right; font-variant-numeric: tabular-nums; }
.article-body code { padding: 0.08rem 0.3rem; border-radius: 3px; background: var(--bg-raised); font-family: 'IBM Plex Mono', monospace; }
.article-end { display: flex; justify-content: space-between; gap: 1.25rem; }
.article-end a { color: var(--accent-strong); }
@media (max-width: 520px) { .top { align-items: flex-start; flex-direction: column; } .article-end { flex-direction: column; } }