body {
  overflow: hidden;
}
.container {
  width: 100%;
  height: calc(100vh - 75px);
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}
#calculator {
  height: 400px;
  width: 300px;
  border: solid 5px #695858;
  box-shadow: 5px 5px 5px rgba(0, 0, 0, 0.5);
  border-radius: 5px;
}
#screen {
  width: 87%;
  height: 75px;
  border: none;
  outline: none;
  background: #a3ae9d;
  font-family: monospace;
  text-align: right;
  font-size: 3.5rem;
  padding: 0 20px;
}
#screen:hover {
  cursor: default;
}
#buttons {
  display: grid;
  grid-template-areas:
    "clear inverse clearall divide"
    "seven eight nine product"
    "four five six minus"
    "one two three plus"
    "zeroNum zeroNum point equal";
  height: calc(100% - 75px);
  user-select: none;
}
#buttons div {
  display: flex;
  justify-content: center;
  align-items: center;
  border: solid 1px #695858;
  font-size: 2rem;
  transition: all 150ms ease-in-out;
  user-select: none;
}
#buttons div:hover {
  background: #c8ead3;
  cursor: pointer;
}
#one {
  grid-area: one;
}
#two {
  grid-area: two;
}
#three {
  grid-area: three;
}
#four {
  grid-area: four;
}
#five {
  grid-area: five;
}
#six {
  grid-area: six;
}
#seven {
  grid-area: seven;
}
#eight {
  grid-area: eight;
}
#nine {
  grid-area: nine;
}
#zeroNum {
  grid-area: zeroNum;
}
#point {
  grid-area: point;
}
#plus {
  grid-area: plus;
  background: #cfffe5;
}
#minus {
  grid-area: minus;
  background: #cfffe5;
}
#divide {
  grid-area: divide;
  background: #cfffe5;
}
#product {
  grid-area: product;
  background: #cfffe5;
}
#equal {
  grid-area: equal;
  background: #b6c8a9;
}
#inverse {
  grid-area: inverse;
}
#clear {
  grid-area: clear;
  font-size: 1.25rem !important;
  font-weight: bold;
}
#clearall {
  grid-area: clearall;
  font-size: 1.25rem !important;
  font-weight: bold;
}