:root {
  --bg: #061525;
  --bg-elevated: #0a2036;
  --bg-card: #0d2a45;
  --border: rgba(77, 200, 255, 0.16);
  --text: #eaf3fc;
  --text-muted: #9fc3e0;
  --accent: #4dc8ff;
  --accent-strong: #1e7faa;
  --gold: #ffd700;
  --font-mono: "Courier New", Courier, monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --max-width: 780px;
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: dark;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a:hover,
a:focus {
  text-decoration: underline;
}

.top-accent {
  height: 3px;
  width: 100%;
  background: linear-gradient(90deg, var(--accent-strong), var(--accent), var(--gold));
}

.site-header {
  display: flex;
  justify-content: center;
  padding: 2.5rem 1.5rem 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
}

.brand img {
  height: 40px;
  width: auto;
  display: block;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1.5rem 4rem;
}

.eyebrow {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 0.5rem;
}

h1 {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 0.75rem;
}

h2 {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  color: var(--accent);
  border-top: 1px solid var(--border);
  padding-top: 2rem;
  margin-top: 2.5rem;
}

h2 .num {
  color: var(--gold);
  margin-right: 0.35rem;
}

h3 {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--text);
}

p {
  color: var(--text-muted);
}

p.lede {
  font-size: 1.1rem;
  color: var(--text);
}

.meta {
  font-size: 0.9rem;
  color: var(--text-muted);
  border-left: 2px solid var(--accent-strong);
  padding-left: 1rem;
  margin: 1.5rem 0 2rem;
}

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

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0;
  font-size: 0.92rem;
}

th,
td {
  text-align: left;
  padding: 0.65rem 0.75rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

th {
  font-family: var(--font-mono);
  color: var(--accent);
  font-weight: 400;
  background: var(--bg-elevated);
}

td {
  color: var(--text-muted);
}

nav.toc {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  margin: 1.75rem 0;
}

nav.toc p {
  font-family: var(--font-mono);
  color: var(--text);
  margin: 0 0 0.75rem;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

nav.toc ol {
  margin: 0;
  padding-left: 1.25rem;
  columns: 2;
  gap: 1.5rem;
}

nav.toc li {
  margin-bottom: 0.4rem;
  font-size: 0.92rem;
}

ul,
ol {
  color: var(--text-muted);
}

.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
  margin-bottom: 0.5rem;
}

.breadcrumb .sep {
  color: var(--accent-strong);
  margin: 0 0.4rem;
}

body.home {
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

body.home .top-accent {
  flex: none;
}

.home-main {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 1.5rem;
}

body.home footer {
  flex: none;
  margin-top: 0;
}

.home-hero {
  text-align: center;
}

.home-hero .brand img {
  width: min(80vw, 820px);
  height: auto;
  max-height: 60vh;
}

.card-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 2.5rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
}

.card h3 {
  margin: 0 0 0.35rem;
}

.card p {
  margin: 0;
  font-size: 0.95rem;
}

site-footer,
footer {
  border-top: 1px solid var(--border);
  margin-top: 3rem;
  padding-top: 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

footer nav {
  margin-bottom: 0.5rem;
}

footer nav a {
  margin: 0 0.6rem;
}

@media (max-width: 520px) {
  nav.toc ol {
    columns: 1;
  }

  h1 {
    font-size: 1.6rem;
  }
}