:root {
  --bg: #0a0a14;
  --panel: #12121f;
  --ink: #e8e8f0;
  --muted: #a0a0b8;
  --accent: #7aa2ff;
  --accent2: #b78aff;
  --border: #23233a;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Inter', system-ui, sans-serif;
  line-height: 1.65;
  font-size: 17px;
}
a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}
.arrow {
  font-size: 0.9em;
}
nav {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(10, 10, 20, 0.82);
  backdrop-filter: blur(8px);
  z-index: 10;
}
nav .brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
}
nav .brand-glyph {
  font-size: 1.3rem;
  color: var(--accent2);
}
nav .spacer {
  flex: 1;
}
nav .nav-link {
  color: var(--muted);
  font-size: 0.95rem;
}
main {
  max-width: 820px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 5rem;
}
.crumbs {
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 1.5rem;
}
.crumbs a {
  color: var(--muted);
}
.page-head {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.5rem;
}
.page-icon {
  width: 54px;
  height: 54px;
  flex: none;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 600;
  font-size: 1.05rem;
  background: linear-gradient(135deg, #1c2440, #2a1c40);
  border: 1px solid var(--border);
  color: var(--accent);
}
h1 {
  font-family: 'Fraunces', serif;
  font-weight: 800;
  font-size: 2.1rem;
  line-height: 1.1;
  margin: 0;
}
.subtitle {
  color: var(--muted);
  margin: 0.4rem 0 1.5rem;
}
.cta {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #0a0a14;
  font-weight: 700;
  padding: 0.7rem 1.2rem;
  border-radius: 10px;
  margin: 0 0.6rem 1.5rem 0;
}
.cta:hover {
  text-decoration: none;
  filter: brightness(1.08);
}
.cta.ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--ink);
}
.media {
  margin: 1.5rem 0;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: #000;
}
.media video {
  display: block;
  width: 100%;
  height: auto;
}
article {
  font-size: 1.02rem;
}
article h1,
article h2,
article h3,
article h4 {
  font-family: 'Fraunces', serif;
  line-height: 1.2;
  margin-top: 2rem;
}
article h2 {
  font-size: 1.5rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.3rem;
}
article h3 {
  font-size: 1.2rem;
}
article code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.9em;
  background: #1a1a2a;
  padding: 0.15em 0.4em;
  border-radius: 5px;
}
article pre {
  background: #0d0d18;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
  overflow: auto;
}
article pre code {
  background: none;
  padding: 0;
}
article img {
  max-width: 100%;
  height: auto;
  border-radius: 10px;
}
article blockquote {
  border-left: 3px solid var(--accent2);
  margin: 1rem 0;
  padding: 0.2rem 0 0.2rem 1rem;
  color: var(--muted);
}
article table {
  border-collapse: collapse;
  width: 100%;
  margin: 1rem 0;
}
article th,
article td {
  border: 1px solid var(--border);
  padding: 0.5rem 0.7rem;
  text-align: left;
}
.mermaid {
  background: #0d0d18;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
  margin: 1rem 0;
}
.related {
  margin-top: 3rem;
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
}
.related h2 {
  font-family: 'Fraunces', serif;
  font-size: 1.2rem;
}
.related ul {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 0.4rem;
}
footer {
  border-top: 1px solid var(--border);
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}
.footer-mark {
  font-size: 1.6rem;
  color: var(--accent2);
  margin-top: 1rem;
}
.hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}
.hub-card {
  display: block;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.2rem;
}
.hub-card:hover {
  border-color: var(--accent);
  text-decoration: none;
}
.hub-card h3 {
  margin: 0.2rem 0 0.4rem;
  font-family: 'Fraunces', serif;
}
.hub-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}
.badge {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.15rem 0.6rem;
  margin-bottom: 0.5rem;
}