:root {
  /* --- Default Theme (Cool Blue / Light Mode) --- */
  --primary: #0ea5e9;
  --primary-dark: #0284c7;
  --primary-light: #072635; 

  --sidebar-bg-start: #0f172a;
  --sidebar-bg-end: #1e293b;

  --body-bg-start: #edf2f7; 
  --body-bg-end: #f4f7fa;

  --header-bg-start: #f8fafc; 
  --header-bg-end: #1f5f9;

  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;

  --surface: #f8fafc; 
  --surface-alt: #edf2f7;
  --text: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --border: #cbd5e1; 
  --table-border: rgba(15, 23, 42, 0.08);
  --accent: var(--primary);
  --accent-dark: var(--primary-dark);
  --accent-light: var(--primary-light);

  /* --- Dynamic Cool Blue Badges (Using Alpha Channels) --- */
  --badge-rent-bg: rgba(15, 23, 42, 0.08);
  --badge-rent-text: var(--text);
  --badge-utilities-bg: rgba(14, 165, 233, 0.15);
  --badge-utilities-text: var(--primary-dark);
  --badge-salaries-bg: rgba(239, 68, 68, 0.12);
  --badge-salaries-text: var(--danger);
  --badge-transport-bg: rgba(245, 158, 11, 0.15);
  --badge-transport-text: #b45309;
  --badge-repairs-bg: rgba(239, 68, 68, 0.12);
  --badge-repairs-text: var(--danger);
  --badge-supplies-bg: rgba(16, 185, 129, 0.15);
  --badge-supplies-text: #047857;
  --badge-marketing-bg: rgba(14, 165, 233, 0.12);
  --badge-marketing-text: var(--primary);
  --badge-insurance-bg: rgba(15, 23, 42, 0.05);
  --badge-insurance-text: var(--text-secondary);
  --badge-taxes-bg: rgba(15, 23, 42, 0.05);
  --badge-taxes-text: var(--text-secondary);
  --badge-misc-bg: rgba(15, 23, 42, 0.04);
  --badge-misc-text: var(--text-muted);
}

[data-theme="healing-green"] {
  /* --- Healing Green Theme (Deep Mint Anchor) --- */
  --primary: #16a34a;
  --primary-dark: #15803d;
  --primary-light: #062b17; 

  --sidebar-bg-start: #062b17;
  --sidebar-bg-end: #14532d;

  --body-bg-start: #eef3f0; 
  --body-bg-end: #f4f7f5;

  --header-bg-start: #f5f9f6; 
  --header-bg-end: #edf3ee;

  --success: #16a34a;
  --warning: #eab308;
  --danger: #dc2626;

  --surface: #f5f9f7; 
  --surface-alt: #e4eee7;
  --text: #05140c;
  --text-secondary: #2f3e46;
  --text-muted: #65757d;
  --border: #ccd5e0;
  --table-border: rgba(6, 43, 23, 0.08);
  --accent: var(--primary);
  --accent-dark: var(--primary-dark);
  --accent-light: var(--primary-light);

  /* --- Dynamic Healing Green Badges (Forest/Sage Tones) --- */
  --badge-rent-bg: rgba(6, 43, 23, 0.08);
  --badge-rent-text: var(--text-secondary);
  --badge-utilities-bg: rgba(22, 163, 74, 0.12);
  --badge-utilities-text: var(--primary-dark);
  --badge-salaries-bg: rgba(220, 26, 38, 0.12);
  --badge-salaries-text: var(--danger);
  --badge-transport-bg: rgba(234, 179, 8, 0.15);
  --badge-transport-text: #a16207;
  --badge-repairs-bg: rgba(220, 26, 38, 0.12);
  --badge-repairs-text: var(--danger);
  --badge-supplies-bg: rgba(22, 163, 74, 0.15);
  --badge-supplies-text: var(--primary-dark);
  --badge-marketing-bg: rgba(22, 163, 74, 0.08);
  --badge-marketing-text: var(--primary);
  --badge-insurance-bg: rgba(6, 43, 23, 0.05);
  --badge-insurance-text: var(--text-secondary);
  --badge-taxes-bg: rgba(6, 43, 23, 0.05);
  --badge-taxes-text: var(--text-secondary);
  --badge-misc-bg: rgba(6, 43, 23, 0.04);
  --badge-misc-text: var(--text-muted);
}

[data-theme="blue-teal"] {
  /* --- Blue Teal Theme (Deep Cyan Anchor) --- */
  --primary: #0d9488;
  --primary-dark: #0f766e;
  --primary-light: #042523; 

  --sidebar-bg-start: #111827;
  --sidebar-bg-end: #0f172a;

  --body-bg-start: #ecf3f2; 
  --body-bg-end: #f3f7f6;

  --header-bg-start: #f4f8f7; 
  --header-bg-end: #ebf3f1;

  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;

  --surface: #f4f8f7; 
  --surface-alt: #e0ecea;
  --text: #051917;
  --text-secondary: #273b39;
  --text-muted: #607371;
  --border: #c3dad6;
  --table-border: rgba(15, 23, 42, 0.06);
  --accent: var(--primary);
  --accent-dark: var(--primary-dark);
  --accent-light: var(--primary-light);

  /* --- Dynamic Blue Teal Badges (Oceanic/Cyan Tones) --- */
  --badge-rent-bg: rgba(5, 25, 23, 0.08);
  --badge-rent-text: var(--text-secondary);
  --badge-utilities-bg: rgba(13, 148, 136, 0.15);
  --badge-utilities-text: var(--primary-dark);
  --badge-salaries-bg: rgba(239, 68, 68, 0.12);
  --badge-salaries-text: var(--danger);
  --badge-transport-bg: rgba(245, 158, 11, 0.15);
  --badge-transport-text: #b45309;
  --badge-repairs-bg: rgba(239, 68, 68, 0.12);
  --badge-repairs-text: var(--danger);
  --badge-supplies-bg: rgba(16, 185, 129, 0.15);
  --badge-supplies-text: #047857;
  --badge-marketing-bg: rgba(13, 148, 136, 0.1);
  --badge-marketing-text: var(--primary);
  --badge-insurance-bg: rgba(5, 25, 23, 0.05);
  --badge-insurance-text: var(--text-secondary);
  --badge-taxes-bg: rgba(5, 25, 23, 0.05);
  --badge-taxes-text: var(--text-secondary);
  --badge-misc-bg: rgba(5, 25, 23, 0.04);
  --badge-misc-text: var(--text-muted);
}

[data-theme="black-white"] {
  /* --- High-Contrast Nordic Minimalist --- */
  --primary: #18181b;
  --primary-dark: #09090b;
  --primary-light: #09090b;

  --sidebar-bg-start: #09090b;
  --sidebar-bg-end: #18181b;

  --body-bg-start: #e4e4e7; 
  --body-bg-end: #f4f4f5;

  --header-bg-start: #fafafa; 
  --header-bg-end: #f4f4f5;

  --success: #16a34a;
  --warning: #ca8a04;
  --danger: #dc2626;

  --surface: #fafafa; 
  --surface-alt: #f4f4f5;
  --text: #09090b;
  --text-secondary: #27272a;
  --text-muted: #71717a;
  --border: #d4d4d8;
  --table-border: rgba(9, 9, 11, 0.1);
  --accent: var(--primary);
  --accent-dark: var(--primary-dark);
  --accent-light: var(--primary-light);

  /* --- Dynamic Nordic Badges (Monochromatic Stark Elements) --- */
  --badge-rent-bg: #18181b;
  --badge-rent-text: #fafafa;
  --badge-utilities-bg: #e4e4e7;
  --badge-utilities-text: #09090b;
  --badge-salaries-bg: rgba(220, 38, 38, 0.1);
  --badge-salaries-text: var(--danger);
  --badge-transport-bg: rgba(202, 138, 4, 0.1);
  --badge-transport-text: var(--warning);
  --badge-repairs-bg: rgba(220, 38, 38, 0.1);
  --badge-repairs-text: var(--danger);
  --badge-supplies-bg: rgba(22, 163, 74, 0.1);
  --badge-supplies-text: var(--success);
  --badge-marketing-bg: #f4f4f5;
  --badge-marketing-text: #27272a;
  --badge-insurance-bg: #f4f4f5;
  --badge-insurance-text: var(--text-muted);
  --badge-taxes-bg: #18181b;
  --badge-taxes-text: #fafafa;
  --badge-misc-bg: transparent;
  --badge-misc-text: var(--text-muted);
}