body, html {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: #000;
}

#background-container {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
}

#image-wrapper {
  position: relative;
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
  max-width: 100%;
  max-height: 100%;
}

#background-image {
  display: block;
  height: auto;
  width: auto;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

#overlay {
  position: absolute;
  top: 0;
  left: 0;
  padding: 16px;
  color: white;
  font-family: 'Segoe UI', sans-serif;
  text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.7);
}

#datetime {
  line-height: 1.3;
  text-align: left;
}

#time {
  font-size: 2.5em;
}

#date {
  font-size: 0.625em;
  display: block;
}