feat: add MIT License and update README for clarity

frontend/src/styles.css

@@ -1,22 +1,8 @@
-@import 'tailwindcss';
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
 
-@theme {
-  --color-deep-blue: #0a1219;
-  --color-deep-blue-light: #121e27;
-  --color-deep-blue-contrast: #1a2835;
-
-  --color-emerald: #10b981;
-  --color-emerald-dark: #059669;
-  --color-emerald-light: #34d399;
-
-  --color-text-primary: #ffffff;
-  --color-text-secondary: #94a3b8;
-  --color-text-tertiary: #64748b;
-
-  --color-accent-yellow: #fbbf24;
-  --color-accent-red: #ef4444;
-  --color-accent-purple: #8b5cf6;
-}
+/* Color theme moved to tailwind.config.js */
 
 body {
   @apply bg-deep-blue text-text-primary h-full;