html,
body {
    height: 100%;
}

body {
    display: -ms-flexbox;
    display: flex;
    -ms-flex-align: center;
    align-items: center;
    padding-top: 40px;
    padding-bottom: 40px;
    background-color: #f5f5f5;
}
.form-signin2 {
    width: 100%;
    max-width: 550px;
    padding: 15px;
    margin: auto;
}
.form-signin {
    width: 100%;
    max-width: 430px;
    padding: 15px;
    margin: auto;
}

    .form-signin .checkbox {
        font-weight: 400;
    }

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

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

    .form-signin input[type="email"] {
        margin-bottom: -1px;
        border-bottom-right-radius: 0;
        border-bottom-left-radius: 0;
    }

    .form-signin input[type="password"] {
        margin-bottom: 10px;
        border-top-left-radius: 0;
        border-top-right-radius: 0;
    }

.captcha input {
    position: relative;
    box-sizing: border-box;
    height: auto;
    font-size: 16px;
    padding: 10px;
    display: block;
    width: 100%;
    padding: 0.375rem 0.75rem;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--bs-body-color);
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-color: var(--bs-body-bg);
    background-clip: padding-box;
    border: var(--bs-border-width) solid var(--bs-border-color);
    border-radius: var(--bs-border-radius);
    transition: border-color .15s ease-in-out,box-shadow .15s ease-in-out;
}

.custom-width {
    width: 100%;
}

@media (min-width: 768px) {
    .custom-width {
        width: 50%;
    }
}