:root {
  --primary-color: #4285f4;
  --secondary-color: #34a853;
  --text-color: #333;
  --light-bg: #f5f5f5;
}

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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  background-color: var(--primary-color);
  color: white;
  padding: 1rem;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

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

nav a {
  color: white;
  text-decoration: none;
}

main {
  flex: 1;
  padding: 1rem;
}

footer {
  background-color: var(--primary-color);
  color: white;
  text-align: center;
  padding: 1rem;
}

@media (max-width: 768px) {
  nav ul {
    flex-direction: column;
    gap: 0.5rem;
  }
}