body {
  background-image: url('background.jpg');
  background-position: center 0;
  background-color: #00000000;
  color: #ffffff;
  font-family: arial;
  font-size: 14pt;
}

button {
  background-color: #ffffff11;
  color: #ffffff99;
  font-family: arial;
  font-size: 14pt;
  border: none;
  border-radius: 5px;
  padding: 5px;
}

.grid-container {
  display: grid;
  grid-template-columns: 50% 50%;
  justify-content: center;
  grid-row-gap: 20px;
  grid-column-gap: 20px;
}

.grid-container>div {
  height: 200px;
  width: 90%;
  margin: 30px
}

select {
  background-color: #00000000;
  color: #ffffff;
  font-family: arial;
  font-size: 14pt;
  border: none;
}

.obst {
  margin: auto;
  height: 500px;
  width: 500px;
}

.grid-container>div>div {
  height: 100%;
  width: 100%;
}

.modal {
  display: block;
  opacity: 0;
  position: fixed;
  z-index: 1;
  padding-top: 10px;
  right: 10px;
  top: 10px;
  width: 200px;
  height: 30px;
  overflow: none;
  border-radius: 5px;
  margin: auto;
  line-height: 30px;
  background-color: rgba(0,0,0,0.3);
  padding: 10px;
  border: 1px solid #888;
}

/* single column view for small screens */
@media screen and (max-width: 1000px) {
  .grid-container {
    grid-template-columns: 100%;
  }

  body {
    font-size: 24pt;
  }

  select {
    font-size: 24pt;
  }

  button {
    font-size: 24pt
  }
}