// When color definition differs for dark and light variant,
// it gets @if ed depending on $variant

@function gtkalpha($c,$a) {
  @return unquote("alpha(#{$c},#{$a})");
}


$base_color: if($variant =='light', #ffffff, #444444);
$bg_color: if($variant =='light', #eeeeee, #333333);
$fg_color: if($variant =='light', #333333, #eeeeee);

$light_color: if($variant =='light', darken($base_color,2%), lighten($base_color,4%));
$dark_color: if($variant =='light', darken($bg_color,4%), darken($bg_color,2%));

$selected_fg_color: #ffffff;
$selected_bg_color: if($variant == 'light', #3498db, #2980b9);

$fill_color: gtkalpha(currentColor, 0.2);
$borders_color: if($variant =='light', transparentize(black, 0.9), transparentize(black, 0.8));

$link_color: if($variant == 'light', #3498db, #2980b9);
$link_visited_color: if($variant == 'light', #9b59b6, #8e44ad);

$warning_color: if($variant =='light', #e67e22, #d35400);
$error_color: if($variant =='light', #e74c3c, #c0392b);
$success_color: if($variant =='light', #2ecc71, #27ae60);
$destructive_color: if($variant =='light', #e74c3c, #c0392b);

//insensitive state derived colors
$insensitive_fg_color: transparentize($fg_color, 0.6);
$insensitive_base_color: mix($bg_color, $base_color, 50%);

//colors for the backdrop state, derived from the main colors.
$backdrop_fg_color: transparentize($fg_color, 0.2);
$backdrop_selected_fg_color: transparentize($selected_fg_color, 0.2);
$backdrop_insensitive_fg_color: transparentize($fg_color, 1 - 0.4 * 0.8);