diff --git a/src/components/panel/ConversationList.tsx b/src/components/panel/ConversationList.tsx
new file mode 100644
index 0000000..2e45bae
--- /dev/null
+++ b/src/components/panel/ConversationList.tsx
@@ -0,0 +1,63 @@
+
+import { User } from "lucide-react";
+import { Card } from "@/components/ui/card";
+
+interface Conversation {
+  id: string;
+  contact: string;
+  lastMessage: string;
+  timestamp: string;
+}
+
+const mockConversations: Conversation[] = [
+  {
+    id: "1",
+    contact: "+1 (555) 987-6543",
+    lastMessage: "Thanks for your message",
+    timestamp: "2 min ago",
+  },
+  {
+    id: "2",
+    contact: "+1 (555) 876-5432",
+    lastMessage: "I'll get back to you shortly",
+    timestamp: "1 hour ago",
+  },
+];
+
+export function ConversationList() {
+  return (
+    <div className="space-y-4 p-4 animate-fadeIn">
+      <div className="flex items-center justify-between mb-6">
+        <h2 className="text-2xl font-semibold tracking-tight">Conversations</h2>
+        <span className="text-sm text-muted-foreground">
+          {mockConversations.length} active
+        </span>
+      </div>
+      <div className="grid gap-4">
+        {mockConversations.map((conversation) => (
+          <Card
+            key={conversation.id}
+            className="p-4 transition-all hover:shadow-md cursor-pointer group"
+          >
+            <div className="flex items-center space-x-4">
+              <div className="h-10 w-10 rounded-full bg-secondary flex items-center justify-center group-hover:bg-primary group-hover:text-white transition-colors">
+                <User className="h-5 w-5" />
+              </div>
+              <div className="flex-1 min-w-0">
+                <div className="flex justify-between items-start">
+                  <h3 className="font-medium truncate">{conversation.contact}</h3>
+                  <span className="text-xs text-muted-foreground whitespace-nowrap ml-2">
+                    {conversation.timestamp}
+                  </span>
+                </div>
+                <p className="text-sm text-muted-foreground truncate">
+                  {conversation.lastMessage}
+                </p>
+              </div>
+            </div>
+          </Card>
+        ))}
+      </div>
+    </div>
+  );
+}
diff --git a/src/components/panel/MessageComposer.tsx b/src/components/panel/MessageComposer.tsx
new file mode 100644
index 0000000..386e40b
--- /dev/null
+++ b/src/components/panel/MessageComposer.tsx
@@ -0,0 +1,71 @@
+
+import { useState } from "react";
+import { Send } from "lucide-react";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+import { Card } from "@/components/ui/card";
+import { toast } from "sonner";
+
+export function MessageComposer() {
+  const [message, setMessage] = useState("");
+  const [phoneNumber, setPhoneNumber] = useState("");
+
+  const handleSend = () => {
+    if (!message.trim() || !phoneNumber.trim()) {
+      toast.error("Please enter both phone number and message");
+      return;
+    }
+    
+    // Mock send functionality
+    toast.success("Message sent successfully!");
+    setMessage("");
+    setPhoneNumber("");
+  };
+
+  return (
+    <Card className="p-6 animate-fadeIn">
+      <div className="space-y-4">
+        <h2 className="text-2xl font-semibold tracking-tight">Send Message</h2>
+        <div className="space-y-4">
+          <div className="space-y-2">
+            <label
+              htmlFor="phone"
+              className="text-sm font-medium leading-none peer-disabled:cursor-not-allowed peer-disabled:opacity-70"
+            >
+              Phone Number
+            </label>
+            <Input
+              id="phone"
+              placeholder="Enter phone number..."
+              value={phoneNumber}
+              onChange={(e) => setPhoneNumber(e.target.value)}
+              className="w-full"
+            />
+          </div>
+          <div className="space-y-2">
+            <label
+              htmlFor="message"
+              className="text-sm font-medium leading-none peer-disabled:cursor-not-allowed peer-disabled:opacity-70"
+            >
+              Message
+            </label>
+            <Input
+              id="message"
+              placeholder="Type your message..."
+              value={message}
+              onChange={(e) => setMessage(e.target.value)}
+              className="w-full"
+            />
+          </div>
+          <Button
+            onClick={handleSend}
+            className="w-full group hover:shadow-md transition-all"
+          >
+            <Send className="mr-2 h-4 w-4 group-hover:scale-110 transition-transform" />
+            Send Message
+          </Button>
+        </div>
+      </div>
+    </Card>
+  );
+}
diff --git a/src/components/panel/Panel.tsx b/src/components/panel/Panel.tsx
new file mode 100644
index 0000000..c337f54
--- /dev/null
+++ b/src/components/panel/Panel.tsx
@@ -0,0 +1,94 @@
+
+import { useState } from "react";
+import { PhoneNumberList } from "./PhoneNumberList";
+import { ConversationList } from "./ConversationList";
+import { MessageComposer } from "./MessageComposer";
+import {
+  MessageSquare,
+  Phone,
+  Send,
+  Menu,
+} from "lucide-react";
+import { Button } from "@/components/ui/button";
+
+type PanelView = "numbers" | "conversations" | "compose";
+
+export function Panel() {
+  const [view, setView] = useState<PanelView>("numbers");
+  const [isSidebarOpen, setIsSidebarOpen] = useState(true);
+
+  const renderView = () => {
+    switch (view) {
+      case "numbers":
+        return <PhoneNumberList />;
+      case "conversations":
+        return <ConversationList />;
+      case "compose":
+        return <MessageComposer />;
+      default:
+        return <PhoneNumberList />;
+    }
+  };
+
+  return (
+    <div className="flex h-screen bg-gray-50">
+      {/* Sidebar */}
+      <div
+        className={`${
+          isSidebarOpen ? "w-64" : "w-16"
+        } bg-white border-r transition-all duration-300 ease-in-out flex flex-col`}
+      >
+        <div className="p-4 border-b flex justify-between items-center">
+          <h1
+            className={`font-semibold ${
+              isSidebarOpen ? "opacity-100" : "opacity-0"
+            } transition-opacity duration-300`}
+          >
+            Chatterbox
+          </h1>
+          <Button
+            variant="ghost"
+            size="icon"
+            onClick={() => setIsSidebarOpen(!isSidebarOpen)}
+            className="hover:bg-gray-100"
+          >
+            <Menu className="h-5 w-5" />
+          </Button>
+        </div>
+        <nav className="flex-1 p-4">
+          <div className="space-y-2">
+            <Button
+              variant={view === "numbers" ? "default" : "ghost"}
+              className="w-full justify-start"
+              onClick={() => setView("numbers")}
+            >
+              <Phone className="mr-2 h-4 w-4" />
+              {isSidebarOpen && "Numbers"}
+            </Button>
+            <Button
+              variant={view === "conversations" ? "default" : "ghost"}
+              className="w-full justify-start"
+              onClick={() => setView("conversations")}
+            >
+              <MessageSquare className="mr-2 h-4 w-4" />
+              {isSidebarOpen && "Conversations"}
+            </Button>
+            <Button
+              variant={view === "compose" ? "default" : "ghost"}
+              className="w-full justify-start"
+              onClick={() => setView("compose")}
+            >
+              <Send className="mr-2 h-4 w-4" />
+              {isSidebarOpen && "New Message"}
+            </Button>
+          </div>
+        </nav>
+      </div>
+
+      {/* Main Content */}
+      <div className="flex-1 overflow-auto">
+        <main className="max-w-4xl mx-auto">{renderView()}</main>
+      </div>
+    </div>
+  );
+}
diff --git a/src/components/panel/PhoneNumberList.tsx b/src/components/panel/PhoneNumberList.tsx
new file mode 100644
index 0000000..212043f
--- /dev/null
+++ b/src/components/panel/PhoneNumberList.tsx
@@ -0,0 +1,56 @@
+
+import { Phone } from "lucide-react";
+import { Card } from "@/components/ui/card";
+
+interface PhoneNumber {
+  id: string;
+  number: string;
+  status: "active" | "inactive";
+}
+
+const mockNumbers: PhoneNumber[] = [
+  { id: "1", number: "+1 (555) 123-4567", status: "active" },
+  { id: "2", number: "+1 (555) 234-5678", status: "active" },
+];
+
+export function PhoneNumberList() {
+  return (
+    <div className="space-y-4 p-4 animate-fadeIn">
+      <div className="flex items-center justify-between mb-6">
+        <h2 className="text-2xl font-semibold tracking-tight">Phone Numbers</h2>
+        <span className="text-sm text-muted-foreground">
+          {mockNumbers.length} numbers
+        </span>
+      </div>
+      <div className="grid gap-4">
+        {mockNumbers.map((number) => (
+          <Card
+            key={number.id}
+            className="p-4 transition-all hover:shadow-md cursor-pointer group"
+          >
+            <div className="flex items-center space-x-4">
+              <div className="h-10 w-10 rounded-full bg-secondary flex items-center justify-center group-hover:bg-primary group-hover:text-white transition-colors">
+                <Phone className="h-5 w-5" />
+              </div>
+              <div className="flex-1">
+                <h3 className="font-medium">{number.number}</h3>
+                <p className="text-sm text-muted-foreground">
+                  Status:{" "}
+                  <span
+                    className={
+                      number.status === "active"
+                        ? "text-green-500"
+                        : "text-red-500"
+                    }
+                  >
+                    {number.status}
+                  </span>
+                </p>
+              </div>
+            </div>
+          </Card>
+        ))}
+      </div>
+    </div>
+  );
+}
diff --git a/src/index.css b/src/index.css
index 33fdf9d..e685a36 100644
--- a/src/index.css
+++ b/src/index.css
@@ -1,3 +1,6 @@
+
+@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');
+
 @tailwind base;
 @tailwind components;
 @tailwind utilities;
@@ -32,70 +35,15 @@
     --input: 214.3 31.8% 91.4%;
     --ring: 222.2 84% 4.9%;
 
-    --radius: 0.5rem;
-
-    --sidebar-background: 0 0% 98%;
-
-    --sidebar-foreground: 240 5.3% 26.1%;
-
-    --sidebar-primary: 240 5.9% 10%;
-
-    --sidebar-primary-foreground: 0 0% 98%;
-
-    --sidebar-accent: 240 4.8% 95.9%;
-
-    --sidebar-accent-foreground: 240 5.9% 10%;
-
-    --sidebar-border: 220 13% 91%;
-
-    --sidebar-ring: 217.2 91.2% 59.8%;
+    --radius: 0.75rem;
   }
 
-  .dark {
-    --background: 222.2 84% 4.9%;
-    --foreground: 210 40% 98%;
-
-    --card: 222.2 84% 4.9%;
-    --card-foreground: 210 40% 98%;
-
-    --popover: 222.2 84% 4.9%;
-    --popover-foreground: 210 40% 98%;
-
-    --primary: 210 40% 98%;
-    --primary-foreground: 222.2 47.4% 11.2%;
-
-    --secondary: 217.2 32.6% 17.5%;
-    --secondary-foreground: 210 40% 98%;
-
-    --muted: 217.2 32.6% 17.5%;
-    --muted-foreground: 215 20.2% 65.1%;
-
-    --accent: 217.2 32.6% 17.5%;
-    --accent-foreground: 210 40% 98%;
-
-    --destructive: 0 62.8% 30.6%;
-    --destructive-foreground: 210 40% 98%;
-
-    --border: 217.2 32.6% 17.5%;
-    --input: 217.2 32.6% 17.5%;
-    --ring: 212.7 26.8% 83.9%;
-    --sidebar-background: 240 5.9% 10%;
-    --sidebar-foreground: 240 4.8% 95.9%;
-    --sidebar-primary: 224.3 76.3% 48%;
-    --sidebar-primary-foreground: 0 0% 100%;
-    --sidebar-accent: 240 3.7% 15.9%;
-    --sidebar-accent-foreground: 240 4.8% 95.9%;
-    --sidebar-border: 240 3.7% 15.9%;
-    --sidebar-ring: 217.2 91.2% 59.8%;
-  }
-}
-
-@layer base {
   * {
     @apply border-border;
   }
 
   body {
-    @apply bg-background text-foreground;
+    @apply bg-background text-foreground antialiased;
+    font-feature-settings: "rlig" 1, "calt" 1;
   }
-}
\ No newline at end of file
+}
diff --git a/src/pages/Index.tsx b/src/pages/Index.tsx
index 52ea22c..c3200de 100644
--- a/src/pages/Index.tsx
+++ b/src/pages/Index.tsx
@@ -1,14 +1,8 @@
-// Update this page (the content is just a fallback if you fail to update the page)
+
+import { Panel } from "@/components/panel/Panel";
 
 const Index = () => {
-  return (
-    <div className="min-h-screen flex items-center justify-center bg-gray-100">
-      <div className="text-center">
-        <h1 className="text-4xl font-bold mb-4">Welcome to Your Blank App</h1>
-        <p className="text-xl text-gray-600">Start building your amazing project here!</p>
-      </div>
-    </div>
-  );
+  return <Panel />;
 };
 
 export default Index;
diff --git a/tailwind.config.ts b/tailwind.config.ts
index 8706086..4045b8a 100644
--- a/tailwind.config.ts
+++ b/tailwind.config.ts
@@ -1,96 +1,96 @@
+
 import type { Config } from "tailwindcss";
 
 export default {
-	darkMode: ["class"],
-	content: [
-		"./pages/**/*.{ts,tsx}",
-		"./components/**/*.{ts,tsx}",
-		"./app/**/*.{ts,tsx}",
-		"./src/**/*.{ts,tsx}",
-	],
-	prefix: "",
-	theme: {
-		container: {
-			center: true,
-			padding: '2rem',
-			screens: {
-				'2xl': '1400px'
-			}
-		},
-		extend: {
-			colors: {
-				border: 'hsl(var(--border))',
-				input: 'hsl(var(--input))',
-				ring: 'hsl(var(--ring))',
-				background: 'hsl(var(--background))',
-				foreground: 'hsl(var(--foreground))',
-				primary: {
-					DEFAULT: 'hsl(var(--primary))',
-					foreground: 'hsl(var(--primary-foreground))'
-				},
-				secondary: {
-					DEFAULT: 'hsl(var(--secondary))',
-					foreground: 'hsl(var(--secondary-foreground))'
-				},
-				destructive: {
-					DEFAULT: 'hsl(var(--destructive))',
-					foreground: 'hsl(var(--destructive-foreground))'
-				},
-				muted: {
-					DEFAULT: 'hsl(var(--muted))',
-					foreground: 'hsl(var(--muted-foreground))'
-				},
-				accent: {
-					DEFAULT: 'hsl(var(--accent))',
-					foreground: 'hsl(var(--accent-foreground))'
-				},
-				popover: {
-					DEFAULT: 'hsl(var(--popover))',
-					foreground: 'hsl(var(--popover-foreground))'
-				},
-				card: {
-					DEFAULT: 'hsl(var(--card))',
-					foreground: 'hsl(var(--card-foreground))'
-				},
-				sidebar: {
-					DEFAULT: 'hsl(var(--sidebar-background))',
-					foreground: 'hsl(var(--sidebar-foreground))',
-					primary: 'hsl(var(--sidebar-primary))',
-					'primary-foreground': 'hsl(var(--sidebar-primary-foreground))',
-					accent: 'hsl(var(--sidebar-accent))',
-					'accent-foreground': 'hsl(var(--sidebar-accent-foreground))',
-					border: 'hsl(var(--sidebar-border))',
-					ring: 'hsl(var(--sidebar-ring))'
-				}
-			},
-			borderRadius: {
-				lg: 'var(--radius)',
-				md: 'calc(var(--radius) - 2px)',
-				sm: 'calc(var(--radius) - 4px)'
-			},
-			keyframes: {
-				'accordion-down': {
-					from: {
-						height: '0'
-					},
-					to: {
-						height: 'var(--radix-accordion-content-height)'
-					}
-				},
-				'accordion-up': {
-					from: {
-						height: 'var(--radix-accordion-content-height)'
-					},
-					to: {
-						height: '0'
-					}
-				}
-			},
-			animation: {
-				'accordion-down': 'accordion-down 0.2s ease-out',
-				'accordion-up': 'accordion-up 0.2s ease-out'
-			}
-		}
-	},
-	plugins: [require("tailwindcss-animate")],
+  darkMode: ["class"],
+  content: [
+    "./pages/**/*.{ts,tsx}",
+    "./components/**/*.{ts,tsx}",
+    "./app/**/*.{ts,tsx}",
+    "./src/**/*.{ts,tsx}",
+  ],
+  prefix: "",
+  theme: {
+    container: {
+      center: true,
+      padding: "2rem",
+      screens: {
+        "2xl": "1400px",
+      },
+    },
+    extend: {
+      fontFamily: {
+        sans: ["Inter", "sans-serif"],
+      },
+      colors: {
+        border: "hsl(var(--border))",
+        input: "hsl(var(--input))",
+        ring: "hsl(var(--ring))",
+        background: "hsl(var(--background))",
+        foreground: "hsl(var(--foreground))",
+        panel: {
+          DEFAULT: "hsl(0 0% 100%)",
+          foreground: "hsl(222.2 84% 4.9%)",
+        },
+        primary: {
+          DEFAULT: "hsl(222.2 47.4% 11.2%)",
+          foreground: "hsl(210 40% 98%)",
+        },
+        secondary: {
+          DEFAULT: "hsl(210 40% 96.1%)",
+          foreground: "hsl(222.2 47.4% 11.2%)",
+        },
+        destructive: {
+          DEFAULT: "hsl(0 84.2% 60.2%)",
+          foreground: "hsl(210 40% 98%)",
+        },
+        muted: {
+          DEFAULT: "hsl(210 40% 96.1%)",
+          foreground: "hsl(215.4 16.3% 46.9%)",
+        },
+        accent: {
+          DEFAULT: "hsl(210 40% 96.1%)",
+          foreground: "hsl(222.2 47.4% 11.2%)",
+        },
+        popover: {
+          DEFAULT: "hsl(0 0% 100%)",
+          foreground: "hsl(222.2 84% 4.9%)",
+        },
+        card: {
+          DEFAULT: "hsl(0 0% 100%)",
+          foreground: "hsl(222.2 84% 4.9%)",
+        },
+      },
+      borderRadius: {
+        lg: "var(--radius)",
+        md: "calc(var(--radius) - 2px)",
+        sm: "calc(var(--radius) - 4px)",
+      },
+      keyframes: {
+        "accordion-down": {
+          from: { height: "0" },
+          to: { height: "var(--radix-accordion-content-height)" },
+        },
+        "accordion-up": {
+          from: { height: "var(--radix-accordion-content-height)" },
+          to: { height: "0" },
+        },
+        slideIn: {
+          "0%": { transform: "translateX(100%)" },
+          "100%": { transform: "translateX(0)" },
+        },
+        fadeIn: {
+          "0%": { opacity: "0" },
+          "100%": { opacity: "1" },
+        },
+      },
+      animation: {
+        "accordion-down": "accordion-down 0.2s ease-out",
+        "accordion-up": "accordion-up 0.2s ease-out",
+        slideIn: "slideIn 0.3s ease-out",
+        fadeIn: "fadeIn 0.3s ease-out",
+      },
+    },
+  },
+  plugins: [require("tailwindcss-animate")],
 } satisfies Config;