#tz-converter.tz-container {
  max-width: 100%;
  box-sizing: border-box;
  padding: 20px;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-family: sans-serif;
}
#tz-converter select,
#tz-converter input[type="datetime-local"] {
  width: 100%;
  padding: 8px;
  margin-top: 4px;
  margin-bottom: 12px;
  box-sizing: border-box;
}
#tz-converter .tz-controls {
  display: flex;
  justify-content: space-between;
  gap: 10px;
}
#tz-converter button {
  padding: 8px 12px;
  cursor: pointer;
}
#tz-converter .tz-result,
#tz-converter .tz-diff {
  margin-top: 10px;
  font-weight: bold;
}
@media (max-width: 600px) {
  #tz-converter .tz-controls {
    flex-direction: column;
  }
}