:root {
  --primary: #1e293b;
  --primary-hover: #0f172a;
  --accent: #3b82f6;
  /* Subtle accent for links */
  --bg: #ffffff;
  --text: #1e293b;
  --text-muted: #475569;
  --border: #e2e8f0;
  --container-max: 800px;
}

@font-face {
  font-family: 'Inter';
  src: url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 6rem 2rem;
}

header {
  margin-bottom: 5rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 2rem;
}

h1 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
  color: var(--primary);
}

.last-updated {
  color: var(--text-muted);
  font-size: 0.9rem;
}

main {
  display: flex;
  flex-direction: column;
  gap: 3.5rem;
}

section {
  scroll-margin-top: 2rem;
}

h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.5rem;
}

.subsection {
  margin-top: 2rem;
  margin-bottom: 1.5rem;
}

h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--primary);
}

p {
  margin-bottom: 1.25rem;
  color: var(--text-muted);
}

ul {
  list-style-type: none;
  margin-bottom: 1.25rem;
}

li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--text-muted);
}

li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--accent);
  opacity: 0.7;
}

footer {
  margin-top: 8rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.85rem;
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: all 0.2s;
}

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

strong {
  color: var(--primary);
  font-weight: 600;
}

ol {
  list-style-position: inside;
  margin-bottom: 1.25rem;
  color: var(--text-muted);
}

ol li {
  padding-left: 0;
  margin-bottom: 1rem;
}

ol li::before {
  content: none;
}

@media (max-width: 640px) {
  .container {
    padding: 3rem 1.5rem;
  }

  h1 {
    font-size: 2rem;
  }

  header {
    margin-bottom: 3rem;
  }

  main {
    gap: 2.5rem;
  }
}