diff --git a/src/components/PreviewStep.tsx b/src/components/PreviewStep.tsx
index a637cf7..2b2dc6e 100644
--- a/src/components/PreviewStep.tsx
+++ b/src/components/PreviewStep.tsx
@@ -1,4 +1,4 @@
-import React, { Suspense, useEffect, useRef, useState } from 'react';
+import React, { Suspense, useEffect, useRef, useState, useMemo } from 'react';
 import { Canvas } from '@react-three/fiber';
 import { OrbitControls, Center, Environment } from '@react-three/drei';
 import * as THREE from 'three';
@@ -8,6 +8,7 @@ import { createBinGeometry, generateSTL, exportSTL } from '../services/geometryG
 import { Download, Package, Info, Loader2, Share2, Check, Ruler } from 'lucide-react';
 import { generateShareUrl } from '../utils/share';
 
+// --- DrawerFrame (Каркас ящика) ---
 const DrawerFrame = ({ config }: { config: AppConfig }) => {
     const { width, depth, height } = config.drawer;
     const offset = 0.5;
@@ -21,29 +22,43 @@ const DrawerFrame = ({ config }: { config: AppConfig }) => {
     )
 }
 
+// --- BinMesh (Ячейка) ---
 interface BinMeshProps {
   part: GeneratedPart;
   thickness: number;
-  cornerRadius: number; // <--- ADDED PROP
+  cornerRadius: number; // Важный проп для радиуса
   isSelected: boolean;
   onClick: () => void;
 }
 
 const BinMesh: React.FC<BinMeshProps> = ({ part, thickness, cornerRadius, isSelected, onClick }) => {
-  const geometry = React.useMemo(() => {
-    // PASS cornerRadius HERE
+  // 1. Создаем основную геометрию ячейки
+  const geometry = useMemo(() => {
     return createBinGeometry(part.width, part.depth, part.height, thickness, cornerRadius);
   }, [part, thickness, cornerRadius]);
 
+  // 2. Создаем геометрию для рамки выделения
+  // Используем EdgesGeometry с порогом 20 градусов. 
+  // Это скроет линии на плавных изгибах (где угол между полигонами ~5-6 градусов),
+  // но оставит четкие грани сверху, снизу и по углам.
+  const edgesGeometry = useMemo(() => {
+     return new THREE.EdgesGeometry(geometry, 20);
+  }, [geometry]);
+
   return (
     <group position={[part.x + part.width/2, 0, part.y + part.depth/2]}>
+       {/* Сама модель */}
        <mesh geometry={geometry} onClick={(e) => { e.stopPropagation(); onClick(); }}>
-         <meshStandardMaterial color={isSelected ? '#f59e0b' : part.color} roughness={0.5} metalness={0.1}/>
+         <meshStandardMaterial 
+            color={isSelected ? '#f59e0b' : part.color} 
+            roughness={0.5} 
+            metalness={0.1}
+         />
        </mesh>
+       
+       {/* Подсветка выделения (теперь повторяет форму скругления) */}
        {isSelected && (
-         <lineSegments position={[0, part.height/2, 0]}>
-            {/* Для подсветки оставляем обычный бокс, т.к. edgesGeometry на extrude выглядит грязно */}
-            <edgesGeometry args={[new THREE.BoxGeometry(part.width, part.height, part.depth)]} />
+         <lineSegments geometry={edgesGeometry}>
             <lineBasicMaterial color="white" linewidth={2} />
          </lineSegments>
        )}
@@ -51,6 +66,7 @@ const BinMesh: React.FC<BinMeshProps> = ({ part, thickness, cornerRadius, isSele
   );
 };
 
+// --- PreviewStep (Основной компонент) ---
 interface Props {
   parts: GeneratedPart[];
   config: AppConfig;
@@ -70,7 +86,6 @@ export const PreviewStep: React.FC<Props> = ({ parts, config, splits }) => {
   }, [selectedId]);
 
   const handleDownload = (part: GeneratedPart) => {
-    // PASS config.cornerRadius HERE
     const geometry = createBinGeometry(part.width, part.depth, part.height, config.wallThickness, config.cornerRadius);
     const mesh = new THREE.Mesh(geometry, new THREE.MeshStandardMaterial());
     exportSTL(mesh, `${part.name.replace(/\s+/g, '_')}.stl`);
@@ -82,7 +97,6 @@ export const PreviewStep: React.FC<Props> = ({ parts, config, splits }) => {
     try {
         const zip = new JSZip();
         parts.forEach(part => {
-            // PASS config.cornerRadius HERE
             const geometry = createBinGeometry(part.width, part.depth, part.height, config.wallThickness, config.cornerRadius);
             const mesh = new THREE.Mesh(geometry, new THREE.MeshStandardMaterial());
             const stlData = generateSTL(mesh);
@@ -135,12 +149,15 @@ export const PreviewStep: React.FC<Props> = ({ parts, config, splits }) => {
 
   return (
     <div className="flex flex-col h-full">
+      {/* Верхняя панель: Размеры + Поделиться */}
       <div className="flex flex-col xl:flex-row justify-between items-center bg-slate-800/80 p-4 rounded-xl border border-slate-700 mb-4 gap-4 backdrop-blur-sm shadow-lg">
+          
           <div className="flex flex-wrap items-center gap-6 justify-center md:justify-start">
               <div className="hidden md:flex items-center gap-2 text-gray-300 mr-2">
                   <Ruler className="text-primary" size={20} />
                   <span className="font-medium text-sm uppercase tracking-wide opacity-70">Размеры ящика:</span>
               </div>
+              
               <div className="flex flex-wrap gap-6 font-mono text-white items-baseline">
                   <div className="flex items-baseline gap-2">
                       <span className="text-slate-500 text-sm font-bold uppercase tracking-wider">Ширина:</span>
@@ -157,6 +174,7 @@ export const PreviewStep: React.FC<Props> = ({ parts, config, splits }) => {
                   <span className="text-sm text-slate-500 font-bold self-baseline">мм</span>
               </div>
           </div>
+
           <button
               onClick={handleShare}
               className={`
@@ -173,6 +191,7 @@ export const PreviewStep: React.FC<Props> = ({ parts, config, splits }) => {
       </div>
 
       <div className="flex flex-col lg:flex-row h-full gap-6 relative flex-1 min-h-0">
+        {/* 3D Viewer */}
         <div className="flex-1 bg-slate-900 rounded-xl overflow-hidden shadow-2xl border border-slate-800 relative min-h-[400px]">
           <div className="absolute top-4 right-4 z-10 bg-black/60 p-3 rounded-lg text-xs text-gray-300 backdrop-blur pointer-events-none border border-slate-700">
              <div className="flex items-center gap-2 mb-1 text-primary font-bold">
@@ -184,6 +203,7 @@ export const PreviewStep: React.FC<Props> = ({ parts, config, splits }) => {
                  <li>• Скролл: Масштаб</li>
              </ul>
           </div>
+          
           <Canvas 
             shadows 
             dpr={[1, 2]} 
@@ -207,7 +227,7 @@ export const PreviewStep: React.FC<Props> = ({ parts, config, splits }) => {
                               key={part.id} 
                               part={part} 
                               thickness={config.wallThickness}
-                              cornerRadius={config.cornerRadius || 0} // PASS PROP
+                              cornerRadius={config.cornerRadius || 0} // <-- ИСПРАВЛЕНО: Передаем радиус
                               isSelected={selectedId === part.id}
                               onClick={() => setSelectedId(part.id)}
                           />
@@ -219,6 +239,7 @@ export const PreviewStep: React.FC<Props> = ({ parts, config, splits }) => {
           </Canvas>
         </div>
 
+        {/* Sidebar List */}
         <div className="w-full lg:w-96 bg-slate-900 p-6 rounded-xl border border-slate-800 flex flex-col h-full shadow-xl">
           <div className="flex justify-between items-center mb-6 shrink-0">
                <h2 className="text-xl font-bold flex items-center gap-2 text-primary">