Rounding off the form fields:


.f-input {
border-radius: 15px;
}

Change the color of the buttons and round off the corners:


.btn {
background-color: #483fec !important;
border-radius: 10px;
}

Change the border color and its thickness:


.lt-tsr-block {
border: 5px solid darkgreen !important;
}

Link to this page location: #2
Link to this page location: #system