html,
body {
    height: 100%;
}

body {
    display: flex;
    align-items: center;
    padding-top: 40px;
    padding-bottom: 40px;
    background-color: #eeeeee;
    font-family: Arial;
}

main {
    width: 100%;
}

.form-signin {
    width: 100%;
    max-width: 500px;
    margin: auto;
}

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

form .form-floating:first-of-type input {
    margin-bottom: -1px;
    border-bottom-right-radius: 0;
    border-bottom-left-radius: 0;
}

form .form-floating:last-of-type input {
    border-top-left-radius: 0;
    border-top-right-radius: 0;
}