Interactive periodic table — all 118 elements, click any cell to see its details. Each cell carries its family colour (alkali metals warm red, halogens teal, noble gases blue, lanthanides + actinides on their own rows below the main grid) so the table reads as a coloured map of element groups even before you know the structure. Detail card shows atomic number, symbol, atomic mass, family, group, period, electron configuration in noble-gas shorthand, melting and boiling points in kelvin (and °C), discovery year, and a one-line plain-English summary of what the element is and what it's used for. Search live by name ("hydrogen"), symbol ("He"), atomic number ("26"), or family ("halogen") — matching cells highlight, others dim. Hover an element on desktop for a quick read without changing the pinned selection. All data baked in; no API calls; works offline once loaded.

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