label {
    display: block;
    width: 300px;       /* same as input */
    margin: 0 auto 5px; /* center + spacing */
    text-align: left;   /* keep text aligned nicely */
}

.required {
    color: gray;
    font-size: 14px;
}

input {
    display: block;
    margin: 0 auto;
    margin-bottom: 15px; /* space between inputs */
    padding: 10px;
    width: 300px;
    border: 1px solid rgb(51, 51, 51);
    border-radius: 5px;
}

form button {
    display: block;
    height: 40px;
    width: 300px;
    margin: 0 auto;
}