form input,
button[name="signup"],
button[name="login"] {
  width: auto;
  padding: 10px;
  margin-bottom: 15px;
  border: 1px solid #ccc;
  border-radius: 3px;
}

form input:hover,
button[name="signup"]:hover,
button[name="login"]:hover {
  background-color: #fefefe;
}

button[class="logout"]{
  width: auto;
  border-radius: 3px;
}

main {
    max-width: 400px; 
  }