Hi Melissa,
maybe i resolved.
In the path, /httpdocs/media/sourcecoast/themes/sclogin/default.css i replaced the code :
/* Vertical Layout */
.sclogin-joomla-login.vertical input#sclogin-username.input-block-level,
.sclogin-joomla-login.vertical input#sclogin-passwd.input-block-level {
width: 87% !important;
}
whit the code,
.sclogin.sourcecoast input[type="text"]:not([class*="uk-"]),
.sclogin.sourcecoast input[type="password"]:not([class*="uk-"]) {
font:initial;
}.
I deleted the cache of browser and now work it!
Do I have to do something else?
Thank you fo your help