/* Code by Rachmat Ghaly */
.box {
  background: linear-gradient(90deg, #00c9ff 0%, #92fe9d 100%);
  border-radius: 8px;
  height: 440pt;
  width: 340pt;
  margin: 0 auto;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.boxInside {
  border-radius: 8px;
  position: relative;
  height: 430pt;
  width: 330pt;
  background-color: white;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.credit {
  margin: 0%;
  padding: 10px 0 8px 5px;
  font-family: sans-serif;
  font-weight: 500;
  font-style: italic;
  font-size: 14px;
}

.boxDisplay {
  border: 3px solid grey;
}

.calcDisplay {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  /* border: 3px solid grey; */
  padding: 0 10px 10px 10px;
  position: relative;
  top: auto;
  height: 50px;
  font-family: sans-serif;
  font-size: 24px;
  text-align: end;
}

.equalDisplay {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  /* border: 3px solid grey; */
  padding: 0 10px 0 10px;
  position: relative;
  top: auto;
  height: 40px;
  font-family: sans-serif;
  font-size: 18px;
  text-align: end;
}

.btnContainer {
  display: grid;
  grid-template-columns: auto auto auto auto;
  grid-template-rows: auto auto auto auto auto;
  position: relative;
  top: auto;
}

.button {
  height: 80px;
  border: 3px solid gray;
  font-family: sans-serif;
  font-size: 24px;
  font-weight: 600;
}

.button:hover {
  background-color: rgb(85, 85, 85);
  color: white;
}

#zero {
  grid-column: span 2;
}

#equal {
  height: auto;
  grid-row: span 2;
  background-color: orange;
}

#equal:hover {
  background-color: rgb(207, 135, 0);
}