feat: blue background during countdown, green only on goal hit

Timer window now uses three distinct background states:
- Idle (no fast running): mint green
- Countdown (fast running, goal not reached): vivid cerulean blue with white text
- Goal hit: Islamic green with white text

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 8 insertions, 3 deletions

diff --git a/src/c/fastforge.c b/src/c/fastforge.c
index 30e08a9..ebed4f6 100644
--- a/src/c/fastforge.c
+++ b/src/c/fastforge.c
@@ -244,12 +244,17 @@ static GColor theme_goal_text_color(void) {
 }
 
 static GColor theme_timer_background_color(bool goal_reached) {
-  return goal_reached ? theme_goal_background_color()
-                      : theme_surface_background_color();
+  if (goal_reached) return theme_goal_background_color();
+  /* Blue background while countdown is active; mint green when idle (no fast). */
+  if (fast_is_running()) return is_color_platform() ? GColorVividCerulean : GColorWhite;
+  return theme_surface_background_color();
 }
 
 static GColor theme_timer_text_color(bool goal_reached) {
-  return goal_reached ? theme_goal_text_color() : GColorBlack;
+  if (goal_reached) return theme_goal_text_color();
+  /* White text on blue countdown background for readability. */
+  if (fast_is_running()) return is_color_platform() ? GColorWhite : GColorBlack;
+  return GColorBlack;
 }
 
 static GColor theme_progress_track_color(void) {