This article explains how to change width of the desktop menu to smaller size to 1160px + 2 gaps left/right 30px. It will look like this after this customization.

Please use this CSS code below. You can find instruction how to add it here: How to add CSS code that is future update compatible

@media (min-width: 1200px) {
 .vehica-menu__wrapper {
   top: 0!important;
 }
  .vehica-menu__wrapper {
    max-width: 1200px !important; /* New Menu Width (including gap 2*30px both side) */
    margin: 0 auto !important;
    position: static;
    animation: none !important;
  }
  .vehica-menu__desktop {
    width: 100% !important;
  }

  .vehica-menu-sticky-active .vehica-header > div:not(.vehica-menu__transparent-wrapper) {
    height: 100px !important; /* Menu not sticky height (to prevent window jumping) */
  }

  .vehica-menu-sticky-active .vehica-menu__desktop {
    position: fixed !important;
    left:0!important;
    background: #fff !important; /* Sticky Background Color */
    height: 70px !important; /* Sticky Menu Height */
    animation: vehica-slide-down 0.5s;
  }
  .vehica-menu-sticky-active .vehica-menu__wrapper {
    position: relative !important;
    box-shadow: none !important;
  }
}