#app {
  width: 100%;
  height: auto;
  margin: 0;
  padding: 0;
  border: none;
  box-sizing: border-box;
}

#button-panel button {
  margin: 5px;
  background-color: #e7e7e7;
  border: 1px solid #ccc;
  border-radius: 4px;
  padding: 10px;
  cursor: pointer;
  font-size: 16px; /* Ensure readability on all devices */
}

#button-panel button:hover {
  background-color: #dcdcdc;
}

textarea {
  width: 100%;
  height: 150px;
  margin: 10px 0;
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 16px;
  resize: none;
}

/* Mobile-specific adjustments */
@media (max-width: 768px) {
  #app {
    padding: 5px;
  }

  input[type="number"],
  input[type="text"] {
    width: calc(33.33% - 15px); /* Ensure boxes fit in a single row if possible */
    margin-right: 10px;
  }

  .room-div span,
  .room-div input {
    width: 100%; /* If too narrow, stack them vertically */
    margin-bottom: 10px;
  }

  textarea {
    font-size: 14px;
    height: 120px;
  }
}