:root {
  --bg: #0a0f19;
  --bg-elev: #111827;
  --panel: #131c2a;
  --border: #243244;
  --text: #ebf2ff;
  --muted: #aebbd1;
  --accent: #36c784;
  --accent-2: #2db7ff;
  --code: #0f1724;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background:
    radial-gradient(circle at top, rgba(45,183,255,0.10), transparent 30%),
    linear-gradient(180deg, #0a0f19 0%, #0b111b 100%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

a {
  color: var(--accent-2);
  text-decoration: none;
}

a:hover { color: #74d4ff; }

.site-shell {
  max-width: 980px;
  margin: 0 auto;
  padding: 32px 24px 72px;
}

.site-header {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 40px;
}

.site-brand {
  color: var(--text);
  font-size: 0.98rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.site-nav a {
  color: var(--muted);
  font-size: 0.9rem;
}

.site-nav a:hover { color: var(--text); }

.site-main h1:first-child,
.site-main p:first-child img {
  margin-top: 0;
}

h1, h2, h3 {
  color: var(--text);
  line-height: 1.15;
}

h1 {
  font-size: clamp(1.9rem, 5.4vw, 3.3rem);
  margin: 0 0 18px;
}

h2 {
  font-size: 1.6rem;
  margin-top: 46px;
  margin-bottom: 16px;
}

h3 {
  font-size: 1.08rem;
  margin-top: 28px;
  margin-bottom: 10px;
}

p, li {
  color: var(--muted);
  font-size: 0.98rem;
}

strong { color: var(--text); }

blockquote {
  margin: 24px 0;
  padding: 16px 20px;
  border-left: 4px solid var(--accent);
  background: rgba(19, 28, 42, 0.85);
  color: var(--text);
}

code, pre {
  font-family: "SFMono-Regular", SFMono-Regular, Consolas, "Liberation Mono", monospace;
}

code {
  padding: 0.15em 0.35em;
  border-radius: 0.35rem;
  background: rgba(255,255,255,0.06);
  color: var(--text);
}

pre {
  overflow-x: auto;
  padding: 18px 20px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--code);
}

pre code {
  padding: 0;
  background: transparent;
}

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 40px 0;
}

img {
  max-width: 100%;
  height: auto;
}

.mermaid {
  margin: 24px 0;
  padding: 18px 16px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--panel);
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  background: rgba(19, 28, 42, 0.7);
}

th, td {
  border: 1px solid var(--border);
  padding: 12px 14px;
  text-align: left;
}

th {
  color: var(--text);
  background: rgba(255,255,255,0.04);
}

@media (max-width: 720px) {
  .site-shell {
    padding: 24px 18px 56px;
  }

  .site-header {
    margin-bottom: 28px;
  }
}