body, html {
  margin: 0;
  padding: 0;
  overflow: hidden;
  background: black;
  color: white;
  font-family: sans-serif;
}

#ui-bar {
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 5px;
  z-index: 10;
}

#urlInput {
  width: 400px;
  padding: 5px;
}

#viewer {
  position: absolute;
  top: 50px;
  left: 0;
  width: 100%;
  height: calc(100% - 50px);
  border: none;
}