How to make a responsive google map from the code
I use in css
It's better to use Google Map API. I've created an example here: http://jsfiddle.net/eugenebolotin/8m1s69e5/1/
Key features are using of functions:
//Full example is here: http://jsfiddle.net/eugenebolotin/8m1s69e5/1/
map.setCenter(map_center);
// Scale map to fit specified points
map.fitBounds(path_bounds);
It handles resize event and automaticaly adjusts size.