.site-shell {
  margin: 0 auto;
  max-width: 1200px;
  padding: 0 1rem;
}

.site-header,
.site-footer {
  padding: 1rem 0;
}

.site-main {
  min-height: 60vh;
  padding: 1rem 0;
}
a:hover,
a:focus,
a:active{
  outline:none;
}