$black-key-width: 32px;
$white-key-width: 40px;
$white-key-height: 192px;
$white-key-count: 17;
$control-focus-color: #f80;
$control-hover-background-color: #1f1f1f;
$control-display-color: #00e5ff;
$control-display-text-shadow: 0 0 6px rgba($control-display-color, 0.7);