changed the text area by entry-summary ,,, but

Welcome,

i have changed the text area usig this method

.entry-summary {
margin-top: 20px;
max-width: 1300px;
width: 100%;
}

but looks like the post footer on the left upper corner overlap with it, so my text start only after the post footer.

i don’t understand what i have done, but i know that i want the text to start as normal and after the footer it extended ?? .

i just need a keyword on how to fix it