:root {
  --primary-color: #1F70B8;
  --font-family: 'Open Sans', sans-serif;
}

body {
  font-family: var(--font-family);
  margin: 0;
  padding: 0;
  background-color: #fff;
  color: #000;
}

header, nav, main, section, footer {
  padding: 1rem;
}

h1, h2, h3 {
  color: var(--primary-color);
}

nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 0;
}

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

@media (max-width: 768px) {
  nav ul {
    flex-direction: column;
  }
}