Web calculator in HTML, CSS and JavaScript

Web calculator built on HTML, CSS and JavaScript. Implemented as a single-page application (SPA) from scratch, without using third-party libraries. The calculator supports basic mode, has a responsive design and instant response to user actions. Special attention is paid to precise positioning of elements, clean code structure and smooth animations.

The project implements: – Pixel-to-pixel layout by reference – Pure JavaScript logic with input processing – Animated transitions between modes – Responsive design for mobile and desktop devices – Optimized styles using CSS Grid, Flexbox and variables.