:root {
  --primary-color: #1a1a1a;
  --accent-color: #7a9e7e;
  --background-color: #ffffff;
  --text-color: #333333;
  --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

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

body {
  font-family: var(--font-family);
  line-height: 1.6;
  background-color: var(--background-color);
  color: var(--text-color);
  padding: 2rem;
}

header {
  border-bottom: 1px solid #ddd;
  margin-bottom: 2rem;
}

header h1 a {
  text-decoration: none;
  color: var(--primary-color);
  font-size: 2rem;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 1rem;
  margin-top: 0.5rem;
}

nav ul li a {
  text-decoration: none;
  color: var(--accent-color);
  font-weight: bold;
}

main {
  max-width: 800px;
  margin: 0 auto;
}

section {
  margin-bottom: 2.5rem;
}

h2 {
  color: var(--primary-color);
  margin-bottom: 1rem;
}

p, li {
  margin-bottom: 1rem;
}

footer {
  margin-top: 4rem;
  text-align: center;
  font-size: 0.9rem;
  color: #777;
}