html {
    height: 100%;
}

body {
    display: flex;
    align-items: center;
    padding-top: 40px;
    padding-bottom: 40px;
    height: 100%;
}

.content-center {
    width: 100%;
    max-width: 550px;
    padding: 15px;
    margin: auto;
}

.content-center .form-control {
    position: relative;
    box-sizing: border-box;
    height: auto;
    padding: 10px;
    font-size: 16px;
    margin-bottom: 1rem;
}


.content-center .checkbox {
    font-weight: 400;
}

.form-sign {
    max-width: 420px;
    margin: 0 auto;
}