:root {
  --bg: #0a0a0c;
  --bg-warm: #1a0f0a;
  --fg: #e8e8ea;
  --fg-muted: #8a8a90;
  --accent: #c4866b;
  --border: #1f1f23;
  --max-w: 640px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", "Hiragino Kaku Gothic ProN", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
  max-width: var(--max-w);
  width: 100%;
  margin: 0 auto;
  padding: 4rem 1.5rem 3rem;
}

header {
  max-width: var(--max-w);
  width: 100%;
  margin: 0 auto;
  padding: 2rem 1.5rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

header .brand {
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--fg);
  text-decoration: none;
}

header nav a {
  color: var(--fg-muted);
  text-decoration: none;
  margin-left: 1rem;
  transition: color 0.15s ease;
}

header nav a:hover,
header nav a.active {
  color: var(--fg);
}

footer {
  max-width: var(--max-w);
  width: 100%;
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
  font-size: 0.8rem;
  color: var(--fg-muted);
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

footer a {
  color: var(--fg-muted);
  text-decoration: none;
}

footer a:hover {
  color: var(--fg);
}

h1 {
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
  line-height: 1.2;
}

.tagline {
  color: var(--fg-muted);
  margin-bottom: 3rem;
  font-size: 1.05rem;
}

h2 {
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
}

h2:first-of-type {
  margin-top: 0;
}

p {
  margin-bottom: 1rem;
  color: var(--fg);
}

p.muted {
  color: var(--fg-muted);
}

ul {
  margin-bottom: 1rem;
  padding-left: 1.25rem;
}

li {
  margin-bottom: 0.4rem;
}

.meta {
  font-size: 0.85rem;
  color: var(--fg-muted);
  margin-bottom: 2.5rem;
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s ease;
}

a:hover {
  border-bottom-color: var(--accent);
}

.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2.5rem 0;
}

code {
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.9em;
  background: rgba(255, 255, 255, 0.05);
  padding: 0.1em 0.35em;
  border-radius: 3px;
}

@media (max-width: 480px) {
  main {
    padding: 2.5rem 1.25rem 2rem;
  }
  header {
    padding: 1.5rem 1.25rem 0;
  }
  footer {
    padding: 1.5rem 1.25rem 2rem;
  }
  h1 {
    font-size: 1.65rem;
  }
}