style.css

* {
    font-family: Segoe UI, "Roboto", Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
    margin: 0px;
    padding: 0px;
    box-sizing: border-box;
}

html {
    font-size: 13px;
    height: 100%;
}

[clear] {
    display: block;
    content: '';
    clear: both;
}

div {
    overflow-wrap: break-word;
}

a[href] {
    text-decoration: none;
    color: inherit;
}

input, .button, textarea,
ul.errorlist > li
{
    line-height: 20px;
    font-family: inherit;
    font-size: inherit;
    border: 1px solid #dadada;
}

input[type=submit], .button {
    padding: 5px 20px;
}

textarea {
    display: block;
    width: 100%;
    padding: 10px;
    min-height: 82px;
    min-height: 82px;
    border: 1px solid #ddd;
    resize: vertical;
    outline: none;
}

menu, ul, li {
    list-style: none;
}


/****/

.middle-center {
    position: absolute;
    top: 30%; left: 50%;
    transform: translate(-50%, -30%);

    width: 300px;
    padding: 12px;
    box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.25);
}

.middle-center > ul.errorlist > li {
    background-color: #FFD2D2;
    color: #D8000C;
    border: 1px solid #D8000C;
}

.middle-center > ul.errorlist > li,
.middle-center textarea,
.middle-center input {
    display: block;
    width: 100%;
    margin-bottom: 6px;
    padding: 6px 12px;
}
.middle-center .button {
    width: 100%;
    margin-bottom: 6px;
}

.middle-center input[type=submit] {
    margin-bottom: 0px;
}

.button {
    text-align: center;
    background-color: #dadada;
    display: block;
}

.button-signout {
    margin-top: 6px;
    margin-bottom: 0px !important;
}

/**/

.info {
    padding: 6px 12px;
    margin-top: 6px;
}
.info-success {
    background-color: #d2ffd5;
    color: #00b935;
    border: 1px solid #00b935;
}
.info-warning {
    background-color: #feffd2;
    color: #b99e00;
    border: 1px solid #b99e00;
}
.info-error {
    background-color: #FFD2D2;
    color: #D8000C;
    border: 1px solid #D8000C;
}