diff --git a/.gitignore b/.gitignore
index f7175a6..e4572a7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -44,4 +44,6 @@ Thumbs.db
 *.db
 
 .nx/cache
-.nx/workspace-data
\ No newline at end of file
+.nx/workspace-data
+.aider*
+.env
diff --git a/src/app/app.component.ts b/src/app/app.component.ts
index 5c17f7f..e428bf9 100644
--- a/src/app/app.component.ts
+++ b/src/app/app.component.ts
@@ -30,10 +30,16 @@ import { ClickOutsideDirective } from './service/click-outside.directive';
       <div class="flex justify-center items-center mb-8">
         <h1 class="text-3xl font-bold mx-auto">Vocabulary Training</h1>
         <div class="relative" appClickOutside (clickOutside)="showDropdown = false">
-          <img [src]="photoURL" alt="User Photo" class="w-10 h-10 rounded-full cursor-pointer" (click)="toggleDropdown()" />
-          <div *ngIf="showDropdown" class="absolute right-0 mt-2 w-48 bg-white rounded-lg shadow-lg">
+          @if(photoURL){
+          <img [src]="photoURL" alt="User Photo" class="w-10 h-10 rounded-full cursor-pointer" (click)="toggleDropdown()" referrerpolicy="no-referrer" crossorigin="anonymous"/>
+          } @else {
+          <div class="image-placeholder w-10 h-10 rounded-full cursor-pointer">Image</div>
+          }
+          @if(showDropdown){
+          <div class="absolute right-0 mt-2 w-48 bg-white rounded-lg shadow-lg">
             <button (click)="logout()" class="block w-full text-left px-4 py-2 text-gray-700 hover:bg-gray-100">Abmelden</button>
           </div>
+          }
         </div>
       </div>
       <app-deck-list></app-deck-list>
@@ -72,6 +78,7 @@ img:hover {
 .dropdown button:hover {
   background-color: #f7fafc;
 }  
+
   `,
   imports: [CommonModule, DeckListComponent, ClickOutsideDirective],
 })
@@ -79,7 +86,7 @@ export class AppComponent {
   isLoggedIn = false;
   private auth: Auth = inject(Auth);
   showDropdown = false;
-  photoURL: string = 'https://via.placeholder.com/40';
+  photoURL: string = 'https://placehold.co/40';
   // user: User | null = null;
 
   ngOnInit() {
@@ -88,7 +95,7 @@ export class AppComponent {
     const accessToken = localStorage.getItem('accessToken');
     const refreshToken = localStorage.getItem('refreshToken');
     this.photoURL = localStorage.getItem('photoURL');
-    this.showDropdown = false;
+   
     if (isLoggedIn && accessToken && refreshToken) {
       this.isLoggedIn = true;
     }
@@ -106,7 +113,9 @@ export class AppComponent {
       localStorage.setItem('accessToken', await result.user.getIdToken());
       localStorage.setItem('refreshToken', result.user.refreshToken);
       localStorage.setItem('photoURL', result.user.photoURL);
-
+      
+      this.showDropdown = false;
+      
       console.log('Logged in with Google', result.user);
     } catch (error) {
       console.error('Google Login failed', error);
diff --git a/src/app/training/training.component.ts b/src/app/training/training.component.ts
index 781c149..0888223 100644
--- a/src/app/training/training.component.ts
+++ b/src/app/training/training.component.ts
@@ -1,7 +1,7 @@
-import { Component, Input, Output, EventEmitter, OnInit, ViewChild, ElementRef } from '@angular/core';
-import { Deck, DeckImage, DeckService, Box } from '../deck.service';
 import { CommonModule } from '@angular/common';
+import { Component, ElementRef, EventEmitter, Input, OnInit, Output, ViewChild } from '@angular/core';
 import { lastValueFrom } from 'rxjs';
+import { Box, Deck, DeckImage, DeckService } from '../deck.service';
 
 const LEARNING_STEPS = {
   AGAIN: 1,      // 1 minute
@@ -267,59 +267,76 @@ export class TrainingComponent implements OnInit {
    * @param action The action ('again', 'good', 'easy')
    * @returns An object with the new values for ivl, factor, reps, and lapses
    */
-  calculateNewInterval(box: Box, action: 'again' | 'good' | 'easy'): { newIvl: number, newFactor: number, newReps: number, newLapses: number, newIsGraduated: boolean } {
+  calculateNewInterval(box: Box, action: 'again' | 'good' | 'easy'): { 
+    newIvl: number, 
+    newFactor: number, 
+    newReps: number, 
+    newLapses: number, 
+    newIsGraduated: boolean 
+  } {
+    const LEARNING_STEPS = {
+      AGAIN: 1,        // 1 minute
+      GOOD: 10,        // 10 minutes
+      GRADUATION: 1440 // 1 day (1440 minutes)
+    };
+  
+    const EASY_BONUS = 1.3;  // Zusätzlicher Easy-Multiplikator
+/*     const FACTOR_CHANGES = {
+      MIN: 1.3,
+      MAX: 2.5,
+      AGAIN: 0.85,
+      EASY: 1.15
+    }; */
+  
     let newIvl = box.ivl || 0;
     let newFactor = box.factor || 2.5;
     let newReps = box.reps || 0;
     let newLapses = box.lapses || 0;
     let newIsGraduated = box.isGraduated || false;
-
+  
     if (action === 'again') {
       newLapses++;
       newReps = 0;
       newIvl = LEARNING_STEPS.AGAIN;
       newIsGraduated = false;
-
-      // Reduce factor but not below minimum
-      newFactor = Math.max(
-        FACTOR_CHANGES.MIN,
-        newFactor * FACTOR_CHANGES.AGAIN
-      );
-
+      newFactor = Math.max(FACTOR_CHANGES.MIN, newFactor * FACTOR_CHANGES.AGAIN);
       return { newIvl, newFactor, newReps, newLapses, newIsGraduated };
     }
-
+  
     if (action === 'easy') {
       newReps++;
-      newIsGraduated = true;
-      newIvl = EASY_INTERVAL;
-
-      // Increase factor but not above maximum
-      newFactor = Math.min(
-        FACTOR_CHANGES.MAX,
-        newFactor * FACTOR_CHANGES.EASY
-      );
-
+      
+      // Faktor zuerst aktualisieren
+      const updatedFactor = Math.min(FACTOR_CHANGES.MAX, newFactor * FACTOR_CHANGES.EASY);
+  
+      if (!newIsGraduated) {
+        // Direkte Graduierung mit Easy
+        newIsGraduated = true;
+        newIvl = LEARNING_STEPS.GRADUATION; // 1 Tag (1440 Minuten)
+      } else {
+        // Anki-Formel für Easy in der Review-Phase
+        newIvl = Math.round((newIvl + LEARNING_STEPS.GRADUATION / 2) * updatedFactor * EASY_BONUS);
+      }
+  
+      newFactor = updatedFactor;
       return { newIvl, newFactor, newReps, newLapses, newIsGraduated };
     }
-
+  
     // Handle 'good' action
     newReps++;
-
+  
     if (!newIsGraduated) {
-      // Card is in learning phase
       if (newReps === 1) {
-        newIvl = LEARNING_STEPS.GOOD;
+        newIvl = LEARNING_STEPS.GOOD; // 10 Minuten
       } else {
-        // Graduate the card
         newIsGraduated = true;
-        newIvl = LEARNING_STEPS.GRADUATION;
+        newIvl = LEARNING_STEPS.GRADUATION; // 1 Tag nach zweiter Good-Antwort
       }
     } else {
-      // Card is in review phase, apply space repetition
+      // Standard-SR-Formel
       newIvl = Math.round(newIvl * newFactor);
     }
-
+  
     return { newIvl, newFactor, newReps, newLapses, newIsGraduated };
   }