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

body {
  font-family: Arial, sans-serif;
  background-color: #f4f7fa;
  display: flex;
}

nav.sidebar {
  background-color: #1e3a5f;
  color: white; 
  width: 220px;
  min-height: 100vh;
  padding: 20px; 
  position: fixed; 
  top: 0;
  left: 0; 
}

nav h2 {
  margin-bottom: 40px;
  font-size: 22px;
}

nav ul {
  list-style: none;
}

nav ul li {
  margin: 20px 0;
}

nav ul li a {
  color: white;
  text-decoration: none;
  font-size: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}


main {
  margin-left: 220px;
  padding: 30px;
  flex: 1;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.header h1 {
  font-size: 24px;
}

@media (max-width: 768px) {
  main {
    margin-left: 0;
  }
  nav.sidebar {
    position: static;
    width: 100%;
    min-height: auto;
  }
}