body {
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 0;
  background-color: gray;
}

h1 {
  text-align: center;
}

h3 {
  margin: 0px;
}

button {
  display: block;
  text-align: center;
  margin: 15px auto;
}

input[type="text"] {
  width: 94.5%;
  padding: 5px;
}

label {
  font-weight: bold;
}

#form {
  border: 1px black solid;
  width: 300px;
  background-color: white;
  padding: 10px;
}

#red {
  color: red;
  font-weight: bolder;
}