body {
  font-family: 'Segoe UI', sans-serif;
  background: #f7f8fa;
  margin: 0;
  padding: 0;
}
header {
  background-color: #4b70e2;
  color: white;
  padding: 1em;
  text-align: center;
}
nav a {
  color: white;
  margin: 0 10px;
  text-decoration: none;
}
main {
  padding: 2em;
}
form {
  display: flex;
  flex-direction: column;
  width: 320px;
}
input, textarea {
  margin-bottom: 10px;
  padding: 8px;
  border: 1px solid #aaa;
  border-radius: 5px;
}
button {
  background-color: #4b70e2;
  color: white;
  border: none;
  padding: 10px;
  cursor: pointer;
  border-radius: 5px;
}
button:hover {
  background-color: #3a5dc1;
}