body {
  height: 100vh;
  width: 100vw;
  overflow: hidden;
  margin: 0;
  padding: 0;
  background-color: transparent;
  padding: 0;
  margin: 0;
  font-family: sans-serif;
}
model-viewer {
  width: 100%;
  height: 100%;
  left: 0;
  top: 0;
}
#progress-bar {
  width: 100%;
  height: 0.5rem;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #fff;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 10;
  opacity: 1;
  transition:
    opacity 0.5s ease-in-out,
    height 0.5s ease-in-out;
}
#progress-bar.fade-out {
  opacity: 0;
  height: 0;
}
#update-bar {
  height: 100%;
  background-color: #f00;
  position: absolute;
  left: 0;
  top: 0;
}
#logo, #error {
  position: absolute;
  left: 50%;
  top: 5%;
  max-width: 450px;
  transform: translateX(-50%);
  z-index: 10;
  opacity: 1;
  transition: opacity 0.5s ease-in-out;
}
#error{
  top: 50%;
  transform: translate(-50%, -50%);
  text-align:center;
}
#logo.fade-out {
  opacity: 0;
}
#btn-ar {
  font-size: 1.5rem;
  position: absolute;
  left: 50%;
  top: 15%;
  transform: translateX(-50%);
  z-index: 10;
  opacity: 0;
  transition: opacity 0.5s ease-in-out;
}
#btn-ar.active {
  opacity: 1;
}

#bt-ar.fade-out {
  opacity: 0;
}
#bt-ar:hover {
  cursor: pointer;
}
#bt-ar:active {
  cursor: pointer;
}
#bt-ar:focus {
  cursor: pointer;
}
#bt-ar:focus-visible {
  cursor: pointer;
}
#bt-ar:focus-within {
  cursor: pointer;
}
#bt-ar:focus-within:hover {
  cursor: pointer;
}
#bt-ar:focus-within:active {
  cursor: pointer;
}