Custom layout-card top card column margin

Hi, please help.
trying to figure how to move the card above without the border around the main column. using as a tablet view. also how to remove the page scrolling on the side and bottom.

cards:
  - type: custom:layout-card
    layout: horizontal
    column_num: 1
    max_columns: 1
    column_width: 1280px
    #max_width: 1280px
    min_width: 1280px
    cards: