Add and Edit Area full width

Hello i was trying to put the edit and add area where the fields are located in full width to better look on my custom template, i try to add this to the css code".ew-custom-template {
width: 1620px;
}.card flex-row flex-wrap {
width: 1620px;
}.ew-desktop {
width: 1620px;
}but the code do not work the fields always break on the same area besides the width is 1620pxany solution for this?thanks

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