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

$higher_opacity: 0.9;
$middle_opacity: 0.6;
$lower_opacity: 0.3;

$enabled_opacity: 0.75;
$hint_opacity: 0.6;
$disabled_opacity: 0.4;

@function scale-alpha($c, $a) {
  @return scale-color($c, $alpha: percentage(-1 + $a));
}

// Foreground colors
$fg_color: if($variant == 'light', scale-alpha(#000000, 0.8), #FFFFFF);
$secondary_fg_color: scale-alpha($fg_color, $enabled_opacity);
$tertiary_fg_color: scale-alpha($fg_color, $hint_opacity);

$selected_fg_color: #FFFFFF;
$secondary_selected_fg_color: scale-alpha($selected_fg_color, $enabled_opacity);
$tertiary_selected_fg_color: scale-alpha($selected_fg_color, $hint_opacity);

$insensitive_fg_color: scale-alpha($fg_color, $disabled_opacity);
$insensitive_secondary_fg_color: scale-alpha($secondary_fg_color, $disabled_opacity);
$insensitive_tertiary_fg_color: scale-alpha($tertiary_fg_color, $disabled_opacity);

$insensitive_selected_fg_color: scale-alpha($selected_fg_color, $disabled_opacity);
$insensitive_secondary_selected_fg_color: scale-alpha($secondary_selected_fg_color, $disabled_opacity);
$insensitive_tertiary_selected_fg_color: scale-alpha($tertiary_selected_fg_color, $disabled_opacity);

// Background colors
$base_color: scale-alpha(if($variant == 'light', #FFFFFF, #455A64), $higher_opacity + 0.05);
$secondary_base_color: scale-alpha($fg_color, 0.05);
$bg_color: scale-alpha(#000000, $middle_opacity);
$osd_bg_color: scale-alpha(#000000, $lower_opacity);
$overview_bg_color: scale-alpha(#FFFFFF, 0.1);

$selected_bg_color: #00BCD4;
$secondary_selected_bg_color: #00E5FF;
$accent_bg_color: #FF4081;

// Misc colors
$track_color: scale-alpha($fg_color, $lower_opacity);
$semi_track_color: scale-alpha($fg_color, $lower_opacity / 2);
$insensitive_track_color: scale-alpha($insensitive_fg_color, $lower_opacity);

$selected_track_color: scale-alpha($selected_fg_color, $lower_opacity);
$selected_semi_track_color: scale-alpha($selected_fg_color, $lower_opacity / 2);
$selected_insensitive_track_color: scale-alpha($insensitive_selected_fg_color, $lower_opacity);

$borders_color: if($variant == 'light', scale-alpha(#000000, 0.1), scale-alpha(#000000, 0.2));
$highlight_color: if($variant == 'light', scale-alpha(#FFFFFF, 0.4), scale-alpha(#FFFFFF, 0.1));
$secondary_highlight_color: scale-alpha(#FFFFFF, 0.2);

$link_color: $selected_bg_color;
$link_visited_color: #E040FB;

$warning_color: #FF6D00;
$error_color: #DD2C00;
$success_color: #00C853;

$suggested_color: $accent_bg_color;
$destructive_color: #FF5252;

$info_bg_color: #66BB6A;
$question_bg_color: #42A5F5;
$warning_bg_color: #FFA726;
$error_bg_color: #EF5350;