html,
body {
  height: 100%;
  margin: 0;
  overflow: hidden;
  padding: 0;
}
html #weather-panel,
body #weather-panel {
  border-radius: 50px;
  box-shadow: #999a 0 0 25px;
  font-family: Verdana, sans-serif;
  height: 500px;
  left: calc(50% - 250px);
  padding: 40px;
  position: absolute;
  text-shadow: #fff 0 0 5px, #fff 0 0 5px, #fff 0 0 5px, #fff 0 0 5px;
  top: calc(50% - 250px);
  width: 500px;
  z-index: 10;
}