body,.btn,.btn__text{
  font-family: 'Karla','Verdana','Helvetica', sans-serif;
}

h1,h2,h3,h4,h5,h6,
.h1,.h2,.h3,.h4,.h5,.h6{
  font-family: 'Karla','Verdana','Helvetica', sans-serif;
}