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Bad margins and centered slider


I meet a problem of slider.
I am new and do not know everything yet. I would like to have a slider like on the next capture, but I can not make proper margins and center it on a particular card to have the arrows on the right and left when loading the page, could you help me for these 2 worries please ?

Here is my site Read-Only :

Thank you,
Have a good day

Nobody can help me ? :frowning_face:


You’ll never walk alone…:slight_smile:

Thanks a lot for your answer !!
Unfortunately, the problem is not solved, I would like the cards to take the whole width.
It should also be that the cards are centered, so that there are 2 on the right and 2 on the left and have the arrows that disappear when we reach the end, because currently the slider does not stop at click. I hope it’s pretty clear, I wish it was like catching.
Thank you so much