.login-form {
  width: 300px;
  margin: 0 auto;
}

body {
  font-family: Tahoma, Geneva, sans-serif;
}
input[type="password"],
input[type="text"] {
  width: 100%;
  padding: 15px;
  border: 1px solid #dddddd;
  margin-bottom: 15px;
  box-sizing: border-box;
}
input[type="submit"] {
  width: 100%;
  padding: 15px;
  background-color: #535b63;
  border: 0;
  box-sizing: border-box;
  cursor: pointer;
  font-weight: bold;
  color: #ffffff;
}

input[type="button"] {
  width: 30%;
  padding: 15px;
  background-color: #535b63;
  border: 0;
  box-sizing: border-box;
  cursor: pointer;
  font-weight: bold;
  color: #ffffff;
}
input[type="button"].red {
  background-color: #ff0000;
}
input[type="button"].green {
  background-color: #00ff00;
}