@import url(https://fonts.googleapis.com/css?family=Roboto);
@import url(https://fonts.googleapis.com/css?family=Material+Icons);

body {
  max-width: 600px;
  margin: 0 auto;
  padding: 0 5vw;
}

* {
  font-family: Roboto, Helvetica, Arial, sans-serif;
    box-sizing: border-box;
}

label {
  display: block;
  width: 100%;
}

.form-control {
    border-color: lightgray;
}

input[type=text],
input[type=email],
input[type=number],
textarea {
    display: block;
    width: 100%;
    margin: 0 0 10px;
    border-radius: 5px;
    border-width: 1px;
    border-style: solid;
    padding: 5px;
}

.is-invalid {
    border-color: palevioletred;
}

.is-valid {
    border-color: lightgreen;
}

button {
    border-radius: 5px;
    padding: 5px;
    border-style: solid;
}