body {
  display: grid;
  grid-template: 1fr/1fr;
  place-items: center;
  width: 100vw;
  height: 100vh;
  background: #0e0e0e;
  margin: 0px;
  padding: 0px;
}

#container {
  grid-template: 1fr 4fr / auto;
  border-radius: 30px;
  display: grid;
  margin: 0;
  padding: 5px;
  width: 600px;
  height: 800px;
  background: #111111;
  box-shadow: 1px 1px 15px black;
}

#screen {
  text-align: center;
  padding: 15px;
  border-top-right-radius: 25px;
  border-top-left-radius: 25px;
  display: grid;
  grid-template: auto 1fr / auto;
  grid-column: auto;
  background: rgb(31, 31, 31);
  font-size: 3em;
  color: #ffffff9f;
  text-shadow: 2px 2px 1px #313131;
}

#innerscreen {
  text-align: center;
  height: 108px;
  padding: 15px;
  border-top-right-radius: 25px;
  border-top-left-radius: 25px;
  display: grid;
  grid-template: auto 1fr / auto;
  grid-column: auto;
  background: rgb(8, 8, 8);
  color: #ffffff9f;
  text-shadow: 2px 2px 1px #313131;
}

#buttons {
  display: grid;
  place-items: center;
  grid-template: 1fr 1fr 1fr 1fr 1fr / auto auto auto auto;
  padding: 10px;
  background: rgb(32, 32, 32);
  border-bottom-right-radius: 25px;
  border-bottom-left-radius: 25px;
}

#trcrnr {
  border-top-right-radius: 20px;
}

#tlcrnr {
  border-top-left-radius: 20px;
  grid-column: 1 / 3;
}

#blcrnr {
  border-bottom-left-radius: 20px;
}

#brcrnr {
  border-bottom-right-radius: 20px;
}

button {
  border: none;
  background: #333333;
  text-align: center;
  width: 100%;
  height: 100%;
  display: block;
  margin: 5px;
  box-shadow: 1px 1px 4px black;
  user-select: none;
  color: #e7e7e7b9;
  font-size: 2em;
  text-shadow: 0 0 5px #000000;
}

#button {
  border: none;
  background: #333333;
  text-align: center;
  width: 100%;
  height: 100%;
  display: block;
  margin: 5px;
  box-shadow: 1px 1px 4px black;
  user-select: none;
}

#output {
  padding: 2%;
  border-style: none;
  border-top-left-radius: 20px;
  border-top-right-radius: 20px;
  text-align: center;
  grid-column: auto;
  background: rgb(54, 54, 54);
}

#input {
  border-style: none;
  border-bottom-left-radius: 20px;
  border-bottom-right-radius: 20px;
  text-align: center;
  grid-column: auto;
  background: rgb(54, 54, 54);
}

#span2 {
  grid-column: 1 / 4;
  column-span: 2;
}

.previous {
  height: 55px;
  width: 100%;
}

button:hover {
  background: rgb(43, 43, 43);
}

#button:hover {
  background: rgb(43, 43, 43);
}

button:active {
  background: rgb(20, 20, 20);
}