Change size of the logo

Plugin-maintenance-load-style.css

.logo {
max-width: 220px;

Plugin-maintenance-load-style.css

.logo {
font-family: inherit;
font-weight:normal;
text-decoration:none;
max-width: 400px;
margin-left:auto;
margin-right:auto;
display: block;
padding: 30px 0;

Add this lines to custom CSS

Which lines ?

Dashboard > Maintenance > Custom css

For example.
.logo {width: 300px; height: 200px;}

If you need RTL.

Just add direction:rtl in body