.error {
    color: red;
    font-size: 0.9em;
    display: none;
}
.valid {
    color: green;
    font-size: 1.2em;
    position: absolute;
    right: 10px;
    top: 10px;
    display: none;
}
.invalid {
    color: red;
    font-size: 1.2em;
    position: absolute;
    right: 10px;
    top: 10px;
    display: none;
}
.form-control {
    width: 100%;
    padding: 5px;
    box-sizing: border-box;
}