:root {
  --color-text: #1a1a1a;
  --color-text-light: #666;
  --color-accent: #0066cc;
  --color-border: #e0e0e0;
  --max-width: 800px;
  --spacing: 1.5rem;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--color-text);
  background: #fff;
  padding: 0 var(--spacing);
}

header {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 0;
  border-bottom: 1px solid var(--color-border);
}

header nav {
  display: flex;
  align-items: center;
}

.site-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 4rem 0;
  min-height: calc(100vh - 250px);
}

h1, h2, h3 {
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

h1 {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
}

h2 {
  font-size: 1.75rem;
  margin-top: 3rem;
}

h3 {
  font-size: 1.25rem;
  margin-top: 2rem;
}

p {
  margin-bottom: 1.25rem;
}

.lead {
  font-size: 1.35rem;
  color: var(--color-text-light);
  margin-bottom: 2.5rem;
}

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

a:hover {
  text-decoration: underline;
}

ul, ol {
  margin-left: 1.5rem;
  margin-bottom: 1.25rem;
}

li {
  margin-bottom: 0.5rem;
}

footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 0;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-light);
  font-size: 0.9rem;
}

.cta {
  margin-top: 2.5rem;
  margin-bottom: 3.5rem;
}

.button {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background: var(--color-accent);
  color: #fff;
  border-radius: 4px;
  font-weight: 500;
  transition: opacity 0.2s;
}

.button:hover {
  opacity: 0.9;
  text-decoration: none;
}

@media (max-width: 600px) {
  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  .lead {
    font-size: 1.2rem;
  }
}