:root {
    --background: 222.2 84% 4.9%;
    --foreground: 210 40% 98%;
    --card: 222.2 84% 4.9%;
    --card-foreground: 210 40% 98%;
    --popover: 222.2 84% 4.9%;
    --popover-foreground: 210 40% 98%;
    --primary: 217.2 91.2% 59.8%;
    --primary-foreground: 222.2 47.4% 11.2%;
    --secondary: 217.2 32.6% 17.5%;
    --secondary-foreground: 210 40% 98%;
    --muted: 217.2 32.6% 17.5%;
    --muted-foreground: 215 20.2% 65.1%;
    --accent: 217.2 32.6% 17.5%;
    --accent-foreground: 210 40% 98%;
    --destructive: 0 62.8% 30.6%;
    --destructive-foreground: 210 40% 98%;
    --border: 217.2 32.6% 17.5%;
    --input: 217.2 32.6% 17.5%;
    --ring: 224.3 76.3% 48%;
  }
  
  .dark {
    --background: 222.2 84% 4.9%;
    --foreground: 210 40% 98%;
    --card: 222.2 84% 4.9%;
    --card-foreground: 210 40% 98%;
    --popover: 222.2 84% 4.9%;
    --popover-foreground: 210 40% 98%;
    --primary: 217.2 91.2% 59.8%;
    --primary-foreground: 222.2 47.4% 11.2%;
    --secondary: 217.2 32.6% 17.5%;
    --secondary-foreground: 210 40% 98%;
    --muted: 217.2 32.6% 17.5%;
    --muted-foreground: 215 20.2% 65.1%;
    --accent: 217.2 32.6% 17.5%;
    --accent-foreground: 210 40% 98%;
    --destructive: 0 62.8% 30.6%;
    --destructive-foreground: 210 40% 98%;
    --border: 217.2 32.6% 17.5%;
    --input: 217.2 32.6% 17.5%;
    --ring: 224.3 76.3% 48%;
  }
  
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: hsl(var(--foreground));
    background-color: hsl(var(--background));
  }
  
  .container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 1rem;
  }
  
  header {
    background-color: hsl(var(--primary));
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  }
  
  nav ul {
    display: flex;
    justify-content: center;
    list-style-type: none;
  }
  
  nav ul li {
    margin: 0 1rem;
  }
  
  nav ul li a {
    color: hsl(var(--primary-foreground));
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
  }
  
  nav ul li a:hover {
    color: hsl(var(--accent-foreground));
  }
  
  main {
    margin: 2rem 0;
  }
  
  section {
    background-color: hsl(var(--card));
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  }
  
  h1 {
    color: hsl(var(--primary));
    margin-bottom: 1rem;
    text-align: center;
    font-size: 2.5rem;
  }
  
  h2 {
    color: hsl(var(--secondary));
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
    font-size: 1.8rem;
  }
  
  p {
    margin-bottom: 1rem;
  }
  
  ul {
    margin-bottom: 1rem;
    padding-left: 2rem;
  }
  
  a {
    color: hsl(var(--primary));
    text-decoration: none;
    transition: color 0.3s ease;
  }
  
  a:hover {
    color: hsl(var(--accent));
    text-decoration: underline;
  }
  
  footer {
    text-align: center;
    padding: 1rem 0;
    background-color: hsl(var(--muted));
    color: hsl(var(--muted-foreground));
  }
  
  .content {
    background-color: hsl(var(--card));
    border-radius: 8px;
    padding: 2rem;
    margin-top: 1rem;
  }
  
  @media (max-width: 600px) {
    nav ul {
      flex-direction: column;
      align-items: center;
    }
  
    nav ul li {
      margin: 0.5rem 0;
    }
  
    section {
      padding: 1rem;
    }
  }