🧪 Interactive Periodic Table Web App
An interactive and educational periodic table of elements built with HTML5, CSS3, and JavaScript, featuring full information panels, category filtering, search, and animated electronic configuration visuals.

🚀 Features
✅ Displays all 118 chemical elements in proper periodic layout
🧠 Hover to view detailed element info:
Atomic number, symbol, mass
Electron configuration (with orbital animation)
State at room temperature
Category (metal, nonmetal, etc.)
Discovery date and discoverer
Common uses and applications
🔍 Filtering capabilities:
Filter by category, physical state, period, and group
Instant search by element name or symbol
🎨 Color-coded elements with responsive design
⚙️ Accessible and keyboard-navigable layout
🧭 Clickable legend for instant sorting/filtering