style.css

#comments-widget h5 {
    margin-top: 1rem;
    margin-bottom: 1rem;
}

#comments-widget {
    font-family: Lato, FreeSans, Roboto, Helvetica, Sans-Serif;
    display: flex;
    flex-direction: column;
}

.comment-form {
    max-width: 100%;
}

.comment-form #commentcontent {
    width: 100%;
    box-sizing: border-box;
}


.comment-form #submit {
    border: 0;
    line-height: 2.5;
    padding: 0 20px;
    font-size: 1rem;
    text-align: center;
    color: #fff;
    text-shadow: 1px 1px 1px #000;
    border-radius: 10px;
    background-color: rgba(0, 0, 220, 1);
    background-image: linear-gradient(to top left, rgba(0, 0, 0, 0.2), rgba(0, 0, 0, 0.2) 30%, rgba(0, 0, 0, 0));
    box-shadow: inset 2px 2px 3px rgba(255, 255, 255, 0.6), inset -2px -2px 3px rgba(0, 0, 0, 0.6);
    margin-top:2px;
    cursor: pointer;
}


@media only screen and (min-width: 481px) {
    .comment-form #submit {
        float: right;
    }
}

@media only screen and (max-width: 481px) {
    .comment-form input {
        width: 100%;
        box-sizing: border-box;
    }
}

.comment {
    white-space: pre-wrap;
    border:solid;
    margin-bottom:0.25em;
    padding:0.5em;
}

#commentsthreadinner {
    margin-top:0.5em;
}