Change Button Style

is there any possibility that i can change the style of the buttons that they look like Sydney Theme buttons?
(Square, transparent with a border and onclick colored?)

Would be nice!
Thank you

Hello again…

you can use these css code below:

.welcome-button, .call-to-action:hover {
    background-color: transparent;
    border: 1px solid;
    color: #c2503d;

.welcome-button, .call-to-action {
    box-shadow: none;

Its working fine!!

Best regards!