body {
       margin: 0;
       background: black;
       overflow: hidden;
       display: flex;
       justify-content: center;
       align-items: center;
       height: 100vh;
   }

   #introVideo {
       position: absolute;
       inset: 0;
       width: 100%;
       height: 100%;
       object-fit: cover;
       display: block;
       z-index: 998;
   }

   .bgimg {
       position: absolute;
       top: 0;
       left: 0;
       width: 100%;
       height: 100%;
       object-fit: cover;
       z-index: -1;
       /* below videos */
   }

   /* Video with transparency */
   video {
       position: absolute;
       top: 0;
       left: 0;
       width: 100%;
       height: 100%;
       object-fit: cover;
       background: transparent;
       z-index: 1;
   }

   /* Hotspots */
   .menuButtons {
       position: absolute;
       cursor: pointer;
       z-index: 2;
       /* above video */
   }

   #btnStart {
       left: 15%;
       bottom: 51%;
       width: 29%;
       height: 22%;
       /* background-color: rgba(100, 100, 100, 0.5); */
   }

   #btnTutorial {
       right: 17%;
       bottom: 12%;
       width: 31%;
       height: 22%;
       /* background-color: rgba(100, 100, 100, 0.5); */
   }

   /* Main 16:9 Frame */
   #videoContainer {
       position: relative;
       width: 80vw;
       aspect-ratio: 1920/1080;
       border: 0px solid lime;
       /* debug frame */
       overflow: hidden;
       box-sizing: border-box;
   }

   .carVideo {
       position: absolute;
       /* MUST be absolute */
       top: 0;
       height: 100%;
       /* fill container height */
       width: auto;
       /* scale proportionally */
       object-fit: contain;
       /* show full video */
       display: none;
       /* initially hidden */
       z-index: 3;
       transform: translateX(-50%);
       /* center by middle */
   }

   #carLeft {
       left: 25%;
       /* center at 1/4 of container */
   }

   #carRight {
       left: 75%;
       /* center at 3/4 of container */
   }

   .floating-ui {
       position: absolute;
       z-index: 3;
       pointer-events: none;
       opacity: 0;
       transform-origin: center;
       transition:
           opacity 0.5s ease,
           transform 0.6s ease;
   }