diff --git a/index.html b/index.html
index cd52b19..2edf90c 100644
--- a/index.html
+++ b/index.html
@@ -6,6 +6,9 @@
     <title>HGTX PromptLab - Laboratório de Prompts de IA</title>
     <meta name="description" content="Crie, edite, teste e versione prompts para agentes de IA de forma profissional e eficiente" />
     <meta name="author" content="HGTX" />
+    <link rel="preconnect" href="https://fonts.googleapis.com" />
+    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
+    <link href="https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap" rel="stylesheet" />
 
     <meta property="og:title" content="HGTX PromptLab - Laboratório de Prompts de IA" />
     <meta property="og:description" content="Crie, edite, teste e versione prompts para agentes de IA de forma profissional e eficiente" />
diff --git a/src/index.css b/src/index.css
index b40404d..22ae396 100644
--- a/src/index.css
+++ b/src/index.css
@@ -2,13 +2,10 @@
 @tailwind components;
 @tailwind utilities;
 
-/* Definition of the design system. All colors, gradients, fonts, etc should be defined here. 
-All colors MUST be HSL.
-*/
-
 @layer base {
   :root {
-    --background: 0 0% 98%;
+    /* HGTX Codex - Light Theme */
+    --background: 210 40% 98%;
     --foreground: 222 47% 11%;
 
     --card: 0 0% 100%;
@@ -17,87 +14,140 @@ All colors MUST be HSL.
     --popover: 0 0% 100%;
     --popover-foreground: 222 47% 11%;
 
-    --primary: 221 83% 53%;
+    --primary: 190 100% 45%;
     --primary-foreground: 0 0% 100%;
 
-    --secondary: 220 14% 96%;
-    --secondary-foreground: 222 47% 11%;
+    --secondary: 210 100% 45%;
+    --secondary-foreground: 0 0% 100%;
 
-    --muted: 220 14% 96%;
+    --muted: 210 40% 96%;
     --muted-foreground: 215 16% 47%;
 
-    --accent: 262 83% 58%;
+    --accent: 190 100% 50%;
     --accent-foreground: 0 0% 100%;
 
     --destructive: 0 84% 60%;
     --destructive-foreground: 0 0% 100%;
 
-    --border: 220 13% 91%;
-    --input: 220 13% 91%;
-    --ring: 221 83% 53%;
+    --border: 214 32% 91%;
+    --input: 214 32% 91%;
+    --ring: 190 100% 45%;
 
     --radius: 0.75rem;
 
-    --sidebar-background: 0 0% 100%;
+    /* Sidebar specific - Light */
+    --sidebar-background: 210 40% 99%;
     --sidebar-foreground: 222 47% 11%;
-    --sidebar-primary: 221 83% 53%;
+    --sidebar-primary: 190 100% 45%;
     --sidebar-primary-foreground: 0 0% 100%;
-    --sidebar-accent: 220 14% 96%;
+    --sidebar-accent: 210 40% 95%;
     --sidebar-accent-foreground: 222 47% 11%;
-    --sidebar-border: 220 13% 91%;
-    --sidebar-ring: 221 83% 53%;
+    --sidebar-border: 214 32% 88%;
+    --sidebar-ring: 190 100% 45%;
 
-    --shadow-card: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
-    --shadow-hover: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
-    --transition-smooth: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
+    /* Custom gradients - Light */
+    --gradient-cyber: linear-gradient(135deg, hsl(190 100% 45%) 0%, hsl(210 100% 45%) 100%);
+    --gradient-subtle: linear-gradient(180deg, hsl(210 40% 98%) 0%, hsl(210 40% 95%) 100%);
+    --glow-cyan: 0 0 40px hsl(190 100% 50% / 0.15);
+    --glow-blue: 0 0 30px hsl(210 100% 50% / 0.12);
+    
+    /* Animation speeds */
+    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
+    --transition-bounce: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
   }
 
   .dark {
-    --background: 222 47% 11%;
-    --foreground: 210 40% 98%;
+    /* HGTX Codex - Dark Theme */
+    --background: 222 47% 5%;
+    --foreground: 200 100% 95%;
 
-    --card: 224 71% 4%;
-    --card-foreground: 210 40% 98%;
+    --card: 222 40% 8%;
+    --card-foreground: 200 100% 95%;
 
-    --popover: 224 71% 4%;
-    --popover-foreground: 210 40% 98%;
+    --popover: 222 45% 10%;
+    --popover-foreground: 200 100% 95%;
 
-    --primary: 221 83% 53%;
-    --primary-foreground: 0 0% 100%;
+    --primary: 190 100% 50%;
+    --primary-foreground: 222 47% 5%;
 
-    --secondary: 217 33% 17%;
-    --secondary-foreground: 210 40% 98%;
+    --secondary: 210 100% 50%;
+    --secondary-foreground: 222 47% 5%;
 
-    --muted: 217 33% 17%;
-    --muted-foreground: 215 20% 65%;
+    --muted: 222 30% 15%;
+    --muted-foreground: 200 20% 65%;
 
-    --accent: 262 83% 58%;
-    --accent-foreground: 0 0% 100%;
+    --accent: 190 100% 60%;
+    --accent-foreground: 222 47% 5%;
 
-    --destructive: 0 63% 31%;
-    --destructive-foreground: 210 40% 98%;
+    --destructive: 0 84% 60%;
+    --destructive-foreground: 200 100% 95%;
 
-    --border: 217 33% 17%;
-    --input: 217 33% 17%;
-    --ring: 224 76% 48%;
-    
-    --sidebar-background: 224 71% 4%;
-    --sidebar-foreground: 210 40% 98%;
-    --sidebar-primary: 221 83% 53%;
-    --sidebar-primary-foreground: 0 0% 100%;
-    --sidebar-accent: 217 33% 17%;
-    --sidebar-accent-foreground: 210 40% 98%;
-    --sidebar-border: 217 33% 17%;
-    --sidebar-ring: 224 76% 48%;
+    --border: 222 30% 18%;
+    --input: 222 30% 18%;
+    --ring: 190 100% 50%;
+
+    /* Sidebar specific - Dark */
+    --sidebar-background: 222 45% 7%;
+    --sidebar-foreground: 200 100% 90%;
+    --sidebar-primary: 190 100% 50%;
+    --sidebar-primary-foreground: 222 47% 5%;
+    --sidebar-accent: 222 35% 12%;
+    --sidebar-accent-foreground: 190 100% 60%;
+    --sidebar-border: 222 30% 15%;
+    --sidebar-ring: 190 100% 50%;
+
+    /* Custom gradients - Dark */
+    --gradient-cyber: linear-gradient(135deg, hsl(190 100% 50%) 0%, hsl(210 100% 50%) 100%);
+    --gradient-subtle: linear-gradient(180deg, hsl(222 45% 8%) 0%, hsl(222 47% 5%) 100%);
+    --glow-cyan: 0 0 40px hsl(190 100% 50% / 0.3);
+    --glow-blue: 0 0 30px hsl(210 100% 50% / 0.25);
   }
 }
 
 @layer base {
   * {
-    @apply border-border;
+    @apply border-border transition-colors;
   }
 
   body {
-    @apply bg-background text-foreground;
+    @apply bg-background text-foreground font-sans antialiased;
+    font-family: 'Inter', system-ui, -apple-system, sans-serif;
+  }
+
+  /* Scrollbar styling */
+  ::-webkit-scrollbar {
+    width: 8px;
+    height: 8px;
+  }
+
+  ::-webkit-scrollbar-track {
+    @apply bg-background;
+  }
+
+  ::-webkit-scrollbar-thumb {
+    @apply bg-muted rounded-full;
+  }
+
+  ::-webkit-scrollbar-thumb:hover {
+    @apply bg-primary/50;
+  }
+}
+
+@layer components {
+  .glass-effect {
+    @apply bg-card/40 backdrop-blur-xl border border-border/50;
+  }
+
+  .cyber-glow {
+    box-shadow: var(--glow-cyan);
+  }
+
+  .cyber-border {
+    @apply border border-primary/30 rounded-lg;
+    box-shadow: 0 0 20px hsl(190 100% 50% / 0.1);
+  }
+
+  .gradient-text {
+    @apply bg-gradient-to-r from-primary to-secondary bg-clip-text text-transparent;
   }
 }
diff --git a/tailwind.config.ts b/tailwind.config.ts
index 878fd4b..ec583e6 100644
--- a/tailwind.config.ts
+++ b/tailwind.config.ts
@@ -13,6 +13,9 @@ export default {
       },
     },
     extend: {
+      fontFamily: {
+        sans: ['Inter', 'system-ui', '-apple-system', 'sans-serif'],
+      },
       colors: {
         border: "hsl(var(--border))",
         input: "hsl(var(--input))",
@@ -63,6 +66,14 @@ export default {
         md: "calc(var(--radius) - 2px)",
         sm: "calc(var(--radius) - 4px)",
       },
+      backgroundImage: {
+        'gradient-cyber': 'var(--gradient-cyber)',
+        'gradient-subtle': 'var(--gradient-subtle)',
+      },
+      boxShadow: {
+        'glow-cyan': 'var(--glow-cyan)',
+        'glow-blue': 'var(--glow-blue)',
+      },
       keyframes: {
         "accordion-down": {
           from: {
@@ -100,19 +111,25 @@ export default {
             opacity: "1"
           }
         },
+        "glow": {
+          "0%, 100%": {
+            opacity: "1",
+          },
+          "50%": {
+            opacity: "0.5",
+          }
+        },
       },
       animation: {
         "accordion-down": "accordion-down 0.2s ease-out",
         "accordion-up": "accordion-up 0.2s ease-out",
         "fade-in": "fade-in 0.3s ease-out",
         "scale-in": "scale-in 0.2s ease-out",
-      },
-      boxShadow: {
-        'card': 'var(--shadow-card)',
-        'hover': 'var(--shadow-hover)',
+        "glow": "glow 2s ease-in-out infinite",
       },
       transitionTimingFunction: {
         'smooth': 'cubic-bezier(0.4, 0, 0.2, 1)',
+        'bounce': 'cubic-bezier(0.68, -0.55, 0.265, 1.55)',
       },
     },
   },