$base-color:        hsl(120, 0%, 55%)
$board-bg-color:    darken($base-color, 43%)
$line-color:        darken($base-color, 10%)
$piece-color:       lighten($base-color,25%)
$current-color:     lighten($base-color,50%)
$current-bg-color:  darken($base-color, 34%)
$current-bg-before: darken($base-color, 38%)

$cell-size: 3.9vmin
$font-size: 2.6vmin