:root {
  --bg: #f5f7f9;
  --fg: #1a2530;
  --muted: #51606e;
  --accent: #2b7a78;
  --accent-soft: #def2f1;
  --border: #d8dee4;
  --code-bg: #eaeef2;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f161c;
    --fg: #e6edf3;
    --muted: #9aa7b3;
    --accent: #5fbfb5;
    --accent-soft: #14302e;
    --border: #233140;
    --code-bg: #1a242e;
  }
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 3rem 1.25rem 4rem;
}

header {
  margin-bottom: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

.badge {
  display: inline-block;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  margin-bottom: 1.25rem;
  letter-spacing: 0.02em;
}

h1 {
  font-size: 2.75rem;
  margin: 0 0 0.5rem;
  letter-spacing: -0.02em;
  color: var(--fg);
}

.tagline {
  font-size: 1.1rem;
  color: var(--fg);
  margin: 0 0 0.75rem;
}

.byline {
  font-size: 0.9rem;
  color: var(--muted);
  margin: 0;
}

section {
  margin-bottom: 2.25rem;
}

h2 {
  font-size: 1.25rem;
  margin: 0 0 0.75rem;
  color: var(--fg);
  letter-spacing: -0.01em;
}

p {
  margin: 0 0 0.85rem;
}

ul {
  margin: 0 0 0.85rem;
  padding-left: 1.25rem;
}

li {
  margin-bottom: 0.5rem;
}

a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

a:hover {
  text-decoration-thickness: 2px;
}

code {
  background: var(--code-bg);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.9em;
  word-break: break-all;
}

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

footer p {
  margin: 0;
}

@media (max-width: 540px) {
  main {
    padding: 2rem 1rem 3rem;
  }
  h1 {
    font-size: 2.25rem;
  }
}