.mac-only,
.linux-only,
.win-only {
  display: none !important;
}

body.mac .mac-only {
  display: block !important;
}

body.win .win-only {
  display: block !important;
}

body.linux .linux-only {
  display: block !important;
}

.c-button div.button {
  margin-bottom: 0.5em;
}

#linux-distro label {
  display: block;
  padding: 5px 0;
}