Vabbè, ho capito, dopo parecchie ricerche mi sono risposto da solo...
Questo il codice inserito nella sezione CSS personalizzato di Altervista Keith in http://scampolidivita.altervista.org
Codice:
/* sottolinea link ipertestuali */
.entry-content a{
text-decoration:underline!important;
}
/* modifica aspetto modulo commenti */
/* preso da http://www.wpbeginner.com/wp-themes/how-to-style-wordpress-comment-form/ */
.comment-form-author,
.comment-form-email,
.comment-form-url {
line-height:0.5;
width:70%;
}
/* ridimensiona altezza area testo libero */
/* preso da https://wordpress.org/support/topic/decrease-height-of-jetpack-contact-form-comments-box */
.comment-form textarea {
height: 120px;
}
/* .comment-form label {
float: left;
} */
#respond {
background: #ececec;
padding:0 2px 0 2px;
}
/* Highlight active form field */
#respond input[type=text], textarea {
-webkit-transition: all 0.20s ease-in-out;
-moz-transition: all 0.20s ease-in-out;
-ms-transition: all 0.20s ease-in-out;
-o-transition: all 0.20s ease-in-out;
outline: none;
padding: 3px 0px 3px 3px;
margin: 5px 1px 3px 0px;
border: 1px solid #DDDDDD;
}
#respond input[type=text]:focus, textarea:focus {
box-shadow: 0 0 5px rgba(81, 203, 238, 1);
margin: 5px 1px 3px 0px;
border: 1px solid rgba(81, 203, 238, 1);
}
.comment-reply-title{
visibility:hidden;
position: relative;
top: -10px;
}
/* modifica titolo area */
/* preso da http://forum.it.altervista.org/wordpress/227930-come-personalizzare-il-nuovo-tema-keith.html */
.comment-reply-title:after {
content: "I commenti sono graditi!";
text-align:left;
display:block;
visibility: visible;
}