fix links reference in overview page and about-us page

docs/landing-page/about-us.md

@@ -51,7 +51,7 @@ If you use SysIdentPy on your scientific publication, we would appreciate citati
 The documentation and structure (even this section) is openly inspired by sklearn, einsteinpy, and many others as we used (and keep using) them to learn.
 
 ## Future
-SysIdentPy is already useful for many researchers and companies to build NARX models for dynamical systems. But still, there are many improvements and features to come. **SysIdentPy** has a great future ahead, and [your help](/developer_guide/contribute){.internal-link target=_blank} is greatly appreciated.
+SysIdentPy is already useful for many researchers and companies to build NARX models for dynamical systems. But still, there are many improvements and features to come. **SysIdentPy** has a great future ahead, and [your help](/developer-guide/contribute){.internal-link target=_blank} is greatly appreciated.
 
 ## Contributors
 

docs/user-guide/overview.md

@@ -1,24 +1,24 @@
 <div class="feature-grid">
   <div class="feature-card">
-    <a href="https://sysidentpy.org/docs/tutorials/your-first-model/" class="feature-link">
+    <a href="https://sysidentpy.org/user-guide/tutorials/your-first-model/" class="feature-link">
       <h3>🧩 Tutorials</h3>
     </a>
     <p>Follow practical tutorials covering how to build models such as <strong>NARX</strong>, <strong>Neural NARX</strong>, <strong>NFIR</strong> and variants. Learn essential steps, from data preparation to model evaluation, using SysIdentPy’s main features.</p>
   </div>
   <div class="feature-card">
-    <a href="https://sysidentpy.org/docs/book/0-Preface/" class="feature-link">
+    <a href="https://sysidentpy.org/book/0-Preface/" class="feature-link">
       <h3>📝 Companion Book</h3>
     </a>
     <p>Looking for more details on <strong>NARMAX models</strong>? Our book, <em><strong>Nonlinear System Identification and Forecasting: Theory and Practice With SysIdentPy</strong></em>, covers the theory behind models and methods, while showing how to implement them using SysIdentPy through a wide range of examples and benchmarks.</p>
   </div>
   <div class="feature-card">
-    <a href="https://sysidentpy.org/docs/how_to/create-a-narx-neural-network/" class="feature-link">
+    <a href="https://sysidentpy.org/user-guide/how-to/create-a-narx-neural-network/" class="feature-link">
       <h3>🔗 How To</h3>
     </a>
     <p>Find practical "how-to" guides on a variety of topics, including selecting basis functions, configuring model parameters, performing predictions, and evaluating model performance. Get straightforward solutions for common modeling tasks.</p>
   </div>
   <div class="feature-card">
-    <a href="https://sysidentpy.org/docs/user_guide/API/narmax-base/" class="feature-link">
+    <a href="https://sysidentpy.org/user-guide/API/narmax-base/" class="feature-link">
       <h3>🎯 API</h3>
     </a>
     <p>Explore the complete <strong>API reference</strong> with detailed documentation of SysIdentPy’s source code. Understand class structures, methods, and parameters to extend and customize functionalities for your projects.</p>