.form-signin {
    width: clamp(200px, 80vw, 400px);
    padding: 2rem;
    margin-inline:auto;
    border: 1px solid rgba(0, 0, 0, 0.2);
    border-radius: .5rem;
}

    .form-signin .checkbox {
        font-weight: normal;
    }

    .form-signin .form-control {
        position: relative;
        font-size: 16px;
        height: auto;
        padding: 10px;
        -webkit-box-sizing: border-box;
        -moz-box-sizing: border-box;
        box-sizing: border-box;
    }

        .form-signin .form-control:focus {
            z-index: 2;
        }