:root{--lustrum-orange: #f08805;--lustrum-lightblue: #98d2eb;--lustrum-darkblue: #000024}.bg_photo{background-repeat:no-repeat;background-attachment:fixed;background-position:center;background-size:cover}.bg_first{background-image:url("/images/lustrum/bg/1.jpg")}.bg_second{background-image:url("/images/lustrum/bg/2.jpg")}.bg_fourth{background-image:url("/images/lustrum/bg/4.jpg")}.bg_lustrum{background-color:var(--lustrum-darkblue)}.dropdown-menu{background-color:var(--lustrum-darkblue)}.btn_lustrum{color:var(--lustrum-orange);background-color:var(--lustrum-darkblue)}.backdrop_dim{backdrop-filter:brightness(65%)}.navlogo{transition:rotate 1s ease-in-out}