app/src/utils/colorScheme.js

export const COLORS = {
  background: '#07070e',
  pianoRollBg: '#0a0a14',
  hitLine: '#ffffff33',
  hitLineGlow: '#ffffff18',

  // Note colors — brand-aligned
  leftHand: '#8b5cf6',
  leftHandGlow: '#a78bfa',
  rightHand: '#06b6d4',
  rightHandGlow: '#22d3ee',

  // Instrument colors
  bass: '#f59e0b',
  bassGlow: '#fbbf24',
  guitar: '#22c55e',
  guitarGlow: '#4ade80',

  // Tab colors
  tabBg: '#0a0a14',
  tabString: '#2a2a40',
  tabFret: '#f1f5f9',
  tabFretPlayed: '#8b5cf6',
  tabProgressLine: '#8b5cf6',

  // Piano key colors
  whiteKey: '#e8e8e8',
  whiteKeyActive: '#c4b5fd',
  blackKey: '#1a1a2e',
  blackKeyActive: '#7c3aed',
  keyBorder: '#2a2a40',

  // Drum lane colors
  drumKick: '#3b82f6',
  drumSnare: '#f59e0b',
  drumHihat: '#06b6d4',
  drumCrash: '#eab308',
  drumRide: '#a78bfa',
  drumTomHigh: '#22c55e',
  drumTomLow: '#16a34a',

  // UI
  text: '#f1f5f9',
  textMuted: '#94a3b8',
  controlsBg: '#0a0a14',
  controlsBorder: '#1e1e3a',
};

export const MIDI_SPLIT_POINT = 60; // Middle C (C4)

export function noteColor(midiNumber, instrument = 'piano') {
  if (instrument === 'bass') return COLORS.bass;
  if (instrument === 'guitar') return COLORS.guitar;
  return midiNumber < MIDI_SPLIT_POINT ? COLORS.leftHand : COLORS.rightHand;
}

export function noteGlowColor(midiNumber, instrument = 'piano') {
  if (instrument === 'bass') return COLORS.bassGlow;
  if (instrument === 'guitar') return COLORS.guitarGlow;
  return midiNumber < MIDI_SPLIT_POINT ? COLORS.leftHandGlow : COLORS.rightHandGlow;
}