* {
  box-sizing: border-box;
  font-family: 'Courier New', Courier, monospace;
}

div#container {
  display: flex;
  justify-content: center;
  align-items: center;
}

div#calculator {
  width: 350px;
  padding: 10px;
  display: flex;
  flex-direction: column;
  border: 1px solid white;
  box-shadow: 0px 0px 6px 0px maroon;
  background-color: beige;
}

div#displayPanel {
  background-color: #9e9e9e26;
  display: flex;
  flex-direction: column;
  align-items: center;
  border: 4px solid silver;
  box-shadow: inset 0px 0px 14px 3px beige;
  padding: 4px;
  height: 100px;
  font-family: monospace;
  font-size: 30px;
  border-radius: 8px;
}

div#keyPad {
  display: flex;
  flex-wrap: wrap;
  padding: 4px;
  margin-top: 10px;
}

button.key {
  box-shadow: 0px 0px 6px 0px maroon;
  flex-basis: 25%;
  height: 50px;
  border: 2px solid silver;
}

button.key:hover {
  border: 2px solid rgb(14, 8, 8);
}

#doubleButtonContainer {
  display: flex;
  width: 100%;
  height: auto;
}

.doubleButton {
  flex: 50%;
}

button#equals {
  background-color: #00ff00;
}



button#cancelAll {
  background-color: #ff2400;
}

button.operator {
  background-color: crimson;
}

div.display {
  display: flex;
  justify-content: end;
  height: 65px;
  width: 314px;
  overflow: hidden;
}

#bottomDisplay {
  font-size: 20px;
  color: rgb(71, 69, 69);
}