.login h1 a {
  background-image: url('https://www.sinapromg.com.br/wp-content/themes/quadrum-theme/images/sinapro-area-exclusiva.png');
  background-size: 100% 140px;
  width: 100%;
  height: 140px;
  margin: 0 0 -20px 0;
  }

  body.login {
    background-color: #f1f1f1;
  }
     
  .wp-core-ui .button-primary{
    background: #000000;
    border-color: #000 #000 #000;
    box-shadow: 0 1px 0 #f3a439;
    border-bottom: 2px solid #f3a439;
    color: #fff;
    text-decoration: none;
    text-shadow: none;
}
 
.wp-core-ui .button-primary a:hover {
  background: #000000;
  border-color: #000 #000 #000;
  box-shadow: 0 1px 0 #f3a439;
  border-bottom: 2px solid #f3a439;
  color: #fff;
  text-decoration: none;
  text-shadow: none;
}