Basic Calculator Mode:
-Perform basic arithmetic operations such as addition, subtraction, multiplication, and division.
-Supports decimal operations and percentage calculations.
-Clear (C) button to reset the calculator.

Scientific Calculator Mode:
-Toggle between Basic and Scientific modes.
-In Scientific Mode, additional operations are available, including:
-Trigonometric functions: sin, cos, tan
-Logarithmic function: log
-Constants: Pi (π), Euler’s Number (e)
-Exponentiation (^) and Square Root (√).
-The app allows easy switching between the two modes.

Full Expression Display:
-As users type their expressions (e.g., 2 + 3 * 5), the full expression is displayed at the top of the screen for clarity before calculating the result.

Dark Mode & Light Mode:
-Users can toggle between dark mode and light mode for better accessibility and comfort based on lighting conditions.

Haptic Feedback:
-Subtle haptic feedback is provided when buttons are pressed, enhancing the tactile experience of using the calculator.

Theme Customization:
-The app offers various color themes that users can cycle through, allowing them to personalize the look and feel of the calculator.

Always Visible Scroll Bar:
-The app features a persistent scroll bar on the right-hand side, even when content fits within the screen, ensuring a consistent user experience.

Responsive Layout:
-The app dynamically adjusts its layout based on screen size, ensuring it works smoothly across different devices, including phones and tablets.