diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..d5cdbe5
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,6 @@
+*.glb filter=lfs diff=lfs merge=lfs -text
+*.gltf filter=lfs diff=lfs merge=lfs -text
+*.png filter=lfs diff=lfs merge=lfs -text
+*.jpg filter=lfs diff=lfs merge=lfs -text
+*.jpeg filter=lfs diff=lfs merge=lfs -text
+*.webp filter=lfs diff=lfs merge=lfs -text
\ No newline at end of file
diff --git a/components/ModelViewer.tsx b/components/ModelViewer.tsx
index 00fda58..a347e5a 100644
--- a/components/ModelViewer.tsx
+++ b/components/ModelViewer.tsx
@@ -1,21 +1,6 @@
 'use client'
 
-import { Suspense } from 'react'
-import { Canvas } from '@react-three/fiber'
-import { Stage, OrbitControls, useGLTF } from '@react-three/drei'
-
-function Model({ url }: { url: string }) {
-  const { scene } = useGLTF(url)
-  return <primitive object={scene} />
-}
-
-function Loader() {
-  return (
-    <div className="absolute inset-0 flex items-center justify-center">
-      <div className="w-6 h-6 border-2 border-gray-500 border-t-gray-300 rounded-full animate-spin" />
-    </div>
-  )
-}
+import { useEffect, useState } from 'react'
 
 interface ModelViewerProps {
   url: string
@@ -24,8 +9,28 @@ interface ModelViewerProps {
 }
 
 export default function ModelViewer({ url, filename, size }: ModelViewerProps) {
+  const [Scene, setScene] = useState<React.ComponentType<{ url: string }> | null>(null)
+
+  useEffect(() => {
+    let cancel = false
+
+    import('./SceneViewer').then((mod) => {
+      if (!cancel) setScene(() => mod.default)
+    })
+
+    return () => { cancel = true }
+  }, [])
+
+  if (!Scene) {
+    return (
+      <div className="w-full h-[450px] bg-black-800 border border-white/20 rounded-xl overflow-hidden flex items-center justify-center">
+        <div className="w-6 h-6 border-2 border-gray-500 border-t-gray-300 rounded-full animate-spin" />
+      </div>
+    )
+  }
+
   return (
-    <div className="w-full h-[450px] bg-black-800 border border-black-700 rounded-xl overflow-hidden relative">
+    <div className="w-full h-[450px] bg-black-800 border border-white/20 rounded-xl overflow-hidden relative">
       <div className="absolute top-3 left-3 z-10 flex items-center gap-2">
         <span className="text-xs text-gray-400 font-mono bg-black-900/60 px-2 py-1 rounded">
           {filename}
@@ -34,14 +39,7 @@ export default function ModelViewer({ url, filename, size }: ModelViewerProps) {
           {size}
         </span>
       </div>
-      <Canvas shadows dpr={[1, 2]} camera={{ fov: 50 }}>
-        <Suspense fallback={null}>
-          <Stage environment="city" intensity={0.6} adjustCamera={1.2}>
-            <Model url={url} />
-          </Stage>
-        </Suspense>
-        <OrbitControls makeDefault autoRotate autoRotateSpeed={0.5} />
-      </Canvas>
+      <Scene url={url} />
     </div>
   )
 }
\ No newline at end of file
diff --git a/components/SceneViewer.tsx b/components/SceneViewer.tsx
new file mode 100644
index 0000000..92afc29
--- /dev/null
+++ b/components/SceneViewer.tsx
@@ -0,0 +1,23 @@
+'use client'
+
+import { Suspense } from 'react'
+import { Canvas } from '@react-three/fiber'
+import { Stage, OrbitControls, useGLTF } from '@react-three/drei'
+
+function Model({ url }: { url: string }) {
+  const { scene } = useGLTF(url)
+  return <primitive object={scene} />
+}
+
+export default function SceneViewer({ url }: { url: string }) {
+  return (
+    <Canvas dpr={[1, 2]} camera={{ fov: 50 }}>
+      <Suspense fallback={null}>
+        <Stage environment="city" intensity={0.6} adjustCamera={1.2}>
+          <Model url={url} />
+        </Stage>
+      </Suspense>
+      <OrbitControls makeDefault autoRotate autoRotateSpeed={0.5} />
+    </Canvas>
+  )
+}
\ No newline at end of file
diff --git a/components/UploadZone.tsx b/components/UploadZone.tsx
index e042e6e..285449f 100644
--- a/components/UploadZone.tsx
+++ b/components/UploadZone.tsx
@@ -15,6 +15,7 @@ interface FileEntry {
   error?: string
   filename?: string
   previewUrl?: string
+  viewerOpen?: boolean
 }
 
 interface UploadResult {
@@ -174,7 +175,7 @@ export default function UploadZone() {
       const newEntries: FileEntry[] = acceptedFiles
         .filter((f) => !existingNames.has(f.name))
         .map((file) => {
-          const entry: FileEntry = { file, status: 'pending', progress: 0 }
+          const entry: FileEntry = { file, status: 'pending', progress: 0, viewerOpen: true }
           const type = getFileType(file.name)
           if (type === 'model') {
             entry.previewUrl = URL.createObjectURL(file)
@@ -190,7 +191,7 @@ export default function UploadZone() {
     accept: ACCEPTED_FORMATS,
     maxSize: 2 * 1024 * 1024 * 1024,
     disabled: isUploading,
-    multiple: true,
+    multiple: false,
   })
 
   const allDone = files.length > 0 && files.every((f) => f.status === 'success')
@@ -207,9 +208,9 @@ export default function UploadZone() {
             onChange={(e) => setSecret(e.target.value)}
             placeholder="Enter secret key..."
             disabled={isUploading}
-            className="w-full bg-black-800 border border-black-700 rounded-xl px-4 py-2.5 pr-12
+            className="w-full bg-black-800 border border-white/30 rounded-xl px-4 py-2.5 pr-12
                        text-gray-100 placeholder-gray-500 text-sm
-                       focus:outline-none focus:ring-2 focus:ring-gray-600 focus:border-gray-500
+                       focus:outline-none focus:ring-2 focus:ring-white/50 focus:border-white/50
                        disabled:opacity-50 disabled:cursor-not-allowed transition"
           />
           <button
@@ -243,52 +244,53 @@ export default function UploadZone() {
           onChange={(e) => setAssetName(e.target.value)}
           placeholder="e.g., tower, stone_floor, brick_wall..."
           disabled={isUploading}
-          className="w-full bg-black-800 border border-black-700 rounded-xl px-4 py-2.5
-                     text-gray-100 placeholder-gray-500 text-sm font-mono
-                     focus:outline-none focus:ring-2 focus:ring-gray-600 focus:border-gray-500
-                     disabled:opacity-50 disabled:cursor-not-allowed transition"
+className="w-full bg-black-800 border border-white/30 rounded-xl px-4 py-2.5
+                   text-gray-100 placeholder-gray-500 text-sm font-mono
+                   focus:outline-none focus:ring-2 focus:ring-white/50 focus:border-white/50
+                   disabled:opacity-50 disabled:cursor-not-allowed transition"
         />
       </div>
 
-      <div
-        {...getRootProps()}
-        className={`
-          relative border-2 border-dashed rounded-2xl p-8 text-center cursor-pointer transition-all duration-200 bg-black-800
-          ${isUploading ? 'cursor-not-allowed opacity-60 border-black-700' : ''}
-          ${isDragReject ? 'border-red-500 bg-red-900/20' : ''}
-          ${isDragActive && !isDragReject ? 'border-gray-400 bg-black-700 scale-[1.01]' : ''}
-          ${!isDragActive && !isDragReject && !isUploading
-            ? 'border-black-600 hover:border-gray-500 hover:bg-black-700'
-            : ''}
-        `}
-      >
-        <input {...getInputProps()} />
-        <div className="flex justify-center mb-3">
-          <div className={`w-12 h-12 rounded-full flex items-center justify-center transition
-            ${isDragActive ? 'bg-gray-700' : 'bg-black-700'}`}>
-            <svg className={`w-6 h-6 transition ${isDragActive ? 'text-white' : 'text-gray-400'}`}
-              fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={1.5}>
-              <path strokeLinecap="round" strokeLinejoin="round"
-                d="M3 16.5v2.25A2.25 2.25 0 005.25 21h13.5A2.25 2.25 0 0021 18.75V16.5m-13.5-9L12 3m0 0l4.5 4.5M12 3v13.5" />
-            </svg>
+      {files.length === 0 && (
+        <div
+          {...getRootProps()}
+          className={`
+            relative border-2 border-dashed rounded-2xl p-8 text-center cursor-pointer transition-all duration-200 bg-black-800
+            ${isUploading ? 'cursor-not-allowed opacity-60 border-white/20' : ''}
+            ${isDragReject ? 'border-red-500 bg-red-900/20' : ''}
+            ${isDragActive && !isDragReject ? 'border-white/50 bg-black-700 scale-[1.01]' : ''}
+            ${!isDragActive && !isDragReject && !isUploading
+              ? 'border-white/30 hover:border-white/50 hover:bg-black-700'
+              : ''}
+          `}
+        >
+          <input {...getInputProps()} />
+          <div className="flex justify-center mb-3">
+            <div className={`w-12 h-12 rounded-full flex items-center justify-center transition ${isDragActive ? 'bg-gray-700' : 'bg-black-700'}`}>
+              <svg className={`w-6 h-6 transition ${isDragActive ? 'text-white' : 'text-gray-400'}`}
+                fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={1.5}>
+                <path strokeLinecap="round" strokeLinejoin="round"
+                  d="M3 16.5v2.25A2.25 2.25 0 005.25 21h13.5A2.25 2.25 0 0021 18.75V16.5m-13.5-9L12 3m0 0l4.5 4.5M12 3v13.5" />
+              </svg>
+            </div>
           </div>
+          {isDragReject ? (
+            <p className="text-sm font-medium text-red-400">Unsupported format</p>
+          ) : isDragActive ? (
+            <p className="text-sm font-medium text-gray-200">Release to add</p>
+          ) : (
+            <>
+              <p className="text-sm font-medium text-gray-300">
+                Drag files here
+                <span className="text-gray-500 font-normal"> or click to browse</span>
+              </p>
+              <p className="text-xs text-gray-500 mt-1">
+                Models: .glb, .gltf · Textures: .png, .jpg, .webp
+              </p>
+            </>
+          )}
         </div>
-        {isDragReject ? (
-          <p className="text-sm font-medium text-red-400">Unsupported format</p>
-        ) : isDragActive ? (
-          <p className="text-sm font-medium text-gray-200">Release to add</p>
-        ) : (
-          <>
-            <p className="text-sm font-medium text-gray-300">
-              Drag files here
-              <span className="text-gray-500 font-normal"> or click to browse</span>
-            </p>
-            <p className="text-xs text-gray-500 mt-1">
-              Models: .glb, .gltf · Textures: .png, .jpg, .webp
-            </p>
-          </>
-        )}
-      </div>
+      )}
 
       {globalError && (
         <p className="text-xs text-red-400 text-center">{globalError}</p>
@@ -300,7 +302,7 @@ export default function UploadZone() {
             const type = getFileType(entry.file.name)
             return (
               <div key={`${entry.file.name}-${i}`}>
-                <div className="flex items-center gap-3 bg-black-800 border border-black-700 rounded-xl px-4 py-3">
+                <div className="flex items-center gap-3 bg-black-800 border border-white/20 rounded-xl px-4 py-3">
 
                 <div className="shrink-0">
                   {entry.status === 'success' ? (
@@ -323,11 +325,25 @@ export default function UploadZone() {
                       </svg>
                     </div>
                   ) : (
-                    <div className="w-8 h-8 rounded-full bg-black-700 flex items-center justify-center">
-                      <svg className="w-4 h-4 text-gray-500" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={1.5}>
+                    <button
+                      onClick={() => {
+                        if (entry.previewUrl && type === 'model') {
+                          updateFile(i, { viewerOpen: !entry.viewerOpen })
+                        }
+                      }}
+                      className={`shrink-0 w-8 h-8 rounded-full flex items-center justify-center transition ${
+                        entry.previewUrl && type === 'model'
+                          ? 'bg-black-700 hover:bg-gray-700 cursor-pointer'
+                          : 'bg-black-700 cursor-default'
+                      }`}
+                    >
+                      <svg 
+                        className={`w-4 h-4 text-gray-500 transition-transform ${entry.viewerOpen ? 'rotate-180' : ''}`} 
+                        fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={1.5}
+                      >
                         <path strokeLinecap="round" strokeLinejoin="round" d="M19 9l-7 7-7-7" />
                       </svg>
-                    </div>
+                    </button>
                   )}
                 </div>
 
@@ -373,7 +389,11 @@ export default function UploadZone() {
               </div>
 
               {entry.previewUrl && type === 'model' && entry.status !== 'success' && (
-                <div className="mt-2">
+                <div 
+                  className={`transition-all duration-300 ease-in-out ${
+                    entry.viewerOpen ? 'max-h-[500px] opacity-100 mt-2' : 'max-h-0 opacity-0'
+                  }`}
+                >
                   <ModelViewer 
                     url={entry.previewUrl} 
                     filename={entry.file.name}
@@ -392,8 +412,9 @@ export default function UploadZone() {
           <button
             onClick={handleUpload}
             className="flex-1 bg-white text-black font-medium text-sm
-                       py-2.5 px-6 rounded-xl transition-opacity duration-150
-                       hover:bg-gray-200 focus:outline-none focus:ring-2 focus:ring-gray-400"
+                       py-2.5 px-6 rounded-xl transition-all duration-150
+                       hover:bg-gray-200 focus:outline-none focus:ring-2 focus:ring-white/50 border border-white/20"
+            style={{ color: '#000000' }}
           >
             Upload {files.filter(f => f.status !== 'success').length > 1
               ? `${files.filter(f => f.status !== 'success').length} files`
diff --git a/package-lock.json b/package-lock.json
index 0e2d016..4ab4949 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8,23 +8,25 @@
       "name": "asset-bridge-3d",
       "version": "0.1.0",
       "dependencies": {
-        "@react-three/drei": "^9.117.0",
-        "@react-three/fiber": "^8.17.10",
-        "next": "^16.1.7",
-        "react": "^18.3.0",
-        "react-dom": "^18.3.0",
-        "react-dropzone": "^14.2.3",
-        "three": "^0.170.0"
+        "@react-three/drei": "~10.7.0",
+        "@react-three/fiber": "~9.5.0",
+        "next": "~16.2.1",
+        "react": "~19.0.0",
+        "react-dom": "~19.0.0",
+        "react-dropzone": "~14.2.3",
+        "three": "~0.183.0",
+        "zustand": "~5.0.3"
       },
       "devDependencies": {
-        "@types/busboy": "^1.5.4",
-        "@types/node": "20.19.37",
-        "@types/react": "18.3.28",
-        "@types/react-dom": "^18.3.0",
-        "autoprefixer": "^10.4.19",
-        "postcss": "^8.4.38",
-        "tailwindcss": "^3.4.4",
-        "typescript": "5.9.3"
+        "@types/busboy": "~1.5.4",
+        "@types/node": "~22.13.0",
+        "@types/react": "~19.0.0",
+        "@types/react-dom": "~19.0.0",
+        "@types/three": "~0.183.0",
+        "autoprefixer": "~10.4.20",
+        "postcss": "~8.5.1",
+        "tailwindcss": "~3.4.17",
+        "typescript": "~5.7.3"
       }
     },
     "node_modules/@alloc/quick-lru": {
@@ -820,113 +822,39 @@
         "node": ">= 8"
       }
     },
-    "node_modules/@react-spring/animated": {
-      "version": "9.7.5",
-      "resolved": "https://registry.npmjs.org/@react-spring/animated/-/animated-9.7.5.tgz",
-      "integrity": "sha512-Tqrwz7pIlsSDITzxoLS3n/v/YCUHQdOIKtOJf4yL6kYVSDTSmVK1LI1Q3M/uu2Sx4X3pIWF3xLUhlsA6SPNTNg==",
-      "license": "MIT",
-      "dependencies": {
-        "@react-spring/shared": "~9.7.5",
-        "@react-spring/types": "~9.7.5"
-      },
-      "peerDependencies": {
-        "react": "^16.8.0 || ^17.0.0 || ^18.0.0"
-      }
-    },
-    "node_modules/@react-spring/core": {
-      "version": "9.7.5",
-      "resolved": "https://registry.npmjs.org/@react-spring/core/-/core-9.7.5.tgz",
-      "integrity": "sha512-rmEqcxRcu7dWh7MnCcMXLvrf6/SDlSokLaLTxiPlAYi11nN3B5oiCUAblO72o+9z/87j2uzxa2Inm8UbLjXA+w==",
-      "license": "MIT",
-      "dependencies": {
-        "@react-spring/animated": "~9.7.5",
-        "@react-spring/shared": "~9.7.5",
-        "@react-spring/types": "~9.7.5"
-      },
-      "funding": {
-        "type": "opencollective",
-        "url": "https://opencollective.com/react-spring/donate"
-      },
-      "peerDependencies": {
-        "react": "^16.8.0 || ^17.0.0 || ^18.0.0"
-      }
-    },
-    "node_modules/@react-spring/rafz": {
-      "version": "9.7.5",
-      "resolved": "https://registry.npmjs.org/@react-spring/rafz/-/rafz-9.7.5.tgz",
-      "integrity": "sha512-5ZenDQMC48wjUzPAm1EtwQ5Ot3bLIAwwqP2w2owG5KoNdNHpEJV263nGhCeKKmuA3vG2zLLOdu3or6kuDjA6Aw==",
-      "license": "MIT"
-    },
-    "node_modules/@react-spring/shared": {
-      "version": "9.7.5",
-      "resolved": "https://registry.npmjs.org/@react-spring/shared/-/shared-9.7.5.tgz",
-      "integrity": "sha512-wdtoJrhUeeyD/PP/zo+np2s1Z820Ohr/BbuVYv+3dVLW7WctoiN7std8rISoYoHpUXtbkpesSKuPIw/6U1w1Pw==",
-      "license": "MIT",
-      "dependencies": {
-        "@react-spring/rafz": "~9.7.5",
-        "@react-spring/types": "~9.7.5"
-      },
-      "peerDependencies": {
-        "react": "^16.8.0 || ^17.0.0 || ^18.0.0"
-      }
-    },
-    "node_modules/@react-spring/three": {
-      "version": "9.7.5",
-      "resolved": "https://registry.npmjs.org/@react-spring/three/-/three-9.7.5.tgz",
-      "integrity": "sha512-RxIsCoQfUqOS3POmhVHa1wdWS0wyHAUway73uRLp3GAL5U2iYVNdnzQsep6M2NZ994BlW8TcKuMtQHUqOsy6WA==",
-      "license": "MIT",
-      "dependencies": {
-        "@react-spring/animated": "~9.7.5",
-        "@react-spring/core": "~9.7.5",
-        "@react-spring/shared": "~9.7.5",
-        "@react-spring/types": "~9.7.5"
-      },
-      "peerDependencies": {
-        "@react-three/fiber": ">=6.0",
-        "react": "^16.8.0 || ^17.0.0 || ^18.0.0",
-        "three": ">=0.126"
-      }
-    },
-    "node_modules/@react-spring/types": {
-      "version": "9.7.5",
-      "resolved": "https://registry.npmjs.org/@react-spring/types/-/types-9.7.5.tgz",
-      "integrity": "sha512-HVj7LrZ4ReHWBimBvu2SKND3cDVUPWKLqRTmWe/fNY6o1owGOX0cAHbdPDTMelgBlVbrTKrre6lFkhqGZErK/g==",
-      "license": "MIT"
-    },
     "node_modules/@react-three/drei": {
-      "version": "9.122.0",
-      "resolved": "https://registry.npmjs.org/@react-three/drei/-/drei-9.122.0.tgz",
-      "integrity": "sha512-SEO/F/rBCTjlLez7WAlpys+iGe9hty4rNgjZvgkQeXFSiwqD4Hbk/wNHMAbdd8vprO2Aj81mihv4dF5bC7D0CA==",
+      "version": "10.7.7",
+      "resolved": "https://registry.npmjs.org/@react-three/drei/-/drei-10.7.7.tgz",
+      "integrity": "sha512-ff+J5iloR0k4tC++QtD/j9u3w5fzfgFAWDtAGQah9pF2B1YgOq/5JxqY0/aVoQG5r3xSZz0cv5tk2YuBob4xEQ==",
       "license": "MIT",
       "dependencies": {
         "@babel/runtime": "^7.26.0",
         "@mediapipe/tasks-vision": "0.10.17",
         "@monogrid/gainmap-js": "^3.0.6",
-        "@react-spring/three": "~9.7.5",
         "@use-gesture/react": "^10.3.1",
-        "camera-controls": "^2.9.0",
+        "camera-controls": "^3.1.0",
         "cross-env": "^7.0.3",
         "detect-gpu": "^5.0.56",
         "glsl-noise": "^0.0.0",
         "hls.js": "^1.5.17",
         "maath": "^0.10.8",
         "meshline": "^3.3.1",
-        "react-composer": "^5.0.3",
         "stats-gl": "^2.2.8",
         "stats.js": "^0.17.0",
         "suspend-react": "^0.1.3",
-        "three-mesh-bvh": "^0.7.8",
+        "three-mesh-bvh": "^0.8.3",
         "three-stdlib": "^2.35.6",
-        "troika-three-text": "^0.52.0",
+        "troika-three-text": "^0.52.4",
         "tunnel-rat": "^0.1.2",
+        "use-sync-external-store": "^1.4.0",
         "utility-types": "^3.11.0",
         "zustand": "^5.0.1"
       },
       "peerDependencies": {
-        "@react-three/fiber": "^8",
-        "react": "^18",
-        "react-dom": "^18",
-        "three": ">=0.137"
+        "@react-three/fiber": "^9.0.0",
+        "react": "^19",
+        "react-dom": "^19",
+        "three": ">=0.159"
       },
       "peerDependenciesMeta": {
         "react-dom": {
@@ -935,32 +863,31 @@
       }
     },
     "node_modules/@react-three/fiber": {
-      "version": "8.18.0",
-      "resolved": "https://registry.npmjs.org/@react-three/fiber/-/fiber-8.18.0.tgz",
-      "integrity": "sha512-FYZZqD0UUHUswKz3LQl2Z7H24AhD14XGTsIRw3SJaXUxyfVMi+1yiZGmqTcPt/CkPpdU7rrxqcyQ1zJE5DjvIQ==",
+      "version": "9.5.0",
+      "resolved": "https://registry.npmjs.org/@react-three/fiber/-/fiber-9.5.0.tgz",
+      "integrity": "sha512-FiUzfYW4wB1+PpmsE47UM+mCads7j2+giRBltfwH7SNhah95rqJs3ltEs9V3pP8rYdS0QlNne+9Aj8dS/SiaIA==",
       "license": "MIT",
       "dependencies": {
         "@babel/runtime": "^7.17.8",
-        "@types/react-reconciler": "^0.26.7",
         "@types/webxr": "*",
         "base64-js": "^1.5.1",
         "buffer": "^6.0.3",
-        "its-fine": "^1.0.6",
-        "react-reconciler": "^0.27.0",
+        "its-fine": "^2.0.0",
         "react-use-measure": "^2.1.7",
-        "scheduler": "^0.21.0",
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@@ -2619,6 +2479,12 @@
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-      "deprecated": "Deprecated due to three.js version incompatibility. Please use v0.8.0, instead.",
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@@ -2935,9 +2800,9 @@
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diff --git a/package.json b/package.json
index fb5185c..8b8de36 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
-  "name": "asset-bridge-3d",
-  "version": "0.1.0",
+  "name": "upload-gltf",
+  "version": "0.0.2",
   "private": true,
   "scripts": {
     "dev": "next dev",
@@ -9,22 +9,24 @@
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-    "react": "^18.3.0",
-    "react-dom": "^18.3.0",
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+    "@types/node": "^22.13.0",
+    "@types/react": "^19.0.0",
+    "@types/react-dom": "^19.0.0",
+    "@types/three": "^0.183.0",
+    "autoprefixer": "^10.4.20",
+    "postcss": "^8.5.1",
+    "tailwindcss": "^3.4.17",
+    "typescript": "^5.7.3"
   }
 }