.bootstrap-scope .well {
  font-size: 1.2em;
}
.bootstrap-scope .mark, .bootstrap-scope mark {
  background-color: #fff;
}
@media (min-width: 1200px) {
  .site-header {
    justify-content: center;
  }

}

@media (max-width: 600px) {
.bootstrap-scope .site-header .mark {
   background: #f5f5f5;
}
}