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 ## Predecessors of Quantum Mechanics
 
+<br>
+
 1. [Leonhard Euler]() (1748) <br>
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@@ -102,9 +104,9 @@ Leonhard Euler, one of the most significant mathematicians in history, contribut
      $\huge \color{DeepSkyBlue} e^{i\theta} = \cos(\theta) + i\sin(\theta)$  
 
      Where:  
-     - **\( e \)**: Base of the natural logarithm.  
-     - **\( \theta \)**: Phase angle.  
-     - **\( i \)**: Imaginary unit.  
+     - $\large \color{DeepSkyBlue} \( e \)$: Base of the natural logarithm.  
+     - \( \theta \)**: Phase angle.  
+     - \( i \)**: Imaginary unit.  
 
      Euler's formula is essential for describing quantum wavefunctions and visualizing oscillations in the complex plane.
 
@@ -119,10 +121,8 @@ Leonhard Euler, one of the most significant mathematicians in history, contribut
 
 ## II. Early 20th Century – Foundations of Quantum Mechanics
 
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 <br>
 
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 2. [Max Planck]() **(1900)** <br>
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    * Founder of quantum theory by introducing the concept of energy quantization.