body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  display: flex;
  color: #fff; 
  background-color: #2f2f2f;
}

a {
    color: #63aeff;
    font-weight: bold;
}

a:hover {
  color: #000000;
}

nav {
  width: 200px;
  background-color: #000;
  color: white;
  height: 100vh;
  padding: 20px;
  box-sizing: border-box;
  position: fixed;
}

nav ul {
  list-style: none;
  padding: 0;
}

nav ul li {
  margin: 10px 0;
}

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

main {
  margin-left: 220px;
  padding: 20px;
  box-sizing: border-box;
  flex: 1;
}

@media (max-width: 768px) {
  nav {
    width: 100%;
    height: auto;
    position: static;
  }

  main {
    margin-left: 0;
    padding: 10px;
  }
}