:root {
  --bg-color: #0d1117;
  --text-primary: #ffffff;
  --text-secondary: #8b949e;
  --accent-color: #58a6ff;
  --border-color: #30363d;
  --card-bg: #161b22;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

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

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

/* Hero Section */
header {
  margin-bottom: 4rem;
  text-align: center;
}

h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.subheadline {
  font-size: 1.25rem;
  color: var(--text-secondary);
  font-weight: 400;
}

/* Section Common Styles */
section {
  margin-bottom: 3.5rem;
}

h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}

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

ul {
  list-style: none;
}

li {
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  padding-left: 1.2rem;
  position: relative;
}

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

/* What This Is Not - specific styling */
.not-list li::before {
  color: #ff7b72;
  /* Reddish for 'not' items */
}

/* Footer & CTA */
footer {
  text-align: center;
  margin-top: 5rem;
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
}

.disclaimer {
  font-size: 0.875rem;
  color: var(--text-secondary);
  opacity: 0.7;
  max-width: 600px;
  margin: 0 auto 2rem;
}

.cta {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--accent-color);
}

@media (max-width: 600px) {
  .container {
    padding: 2rem 1.5rem;
  }

  h1 {
    font-size: 2rem;
  }
}