* {
  box-sizing: border-box;
  
}

/* CALCULATOR */
#calculator {
  width: 400px;
  height: 615px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background-color: #000;
  margin: auto;
  margin-top: 8%;
  border-radius: 7px;
}

/* ROWS */
#row1, #row2, #row3, #row4, #row5, #row6{
  display: flex;
  justify-content: space-between;
  height: 16.25%;
}


/* BUTTONS */
button {
  border-radius: 0px;
  border: none;
  cursor: pointer;
  width: 24.5%;
  height: 100px;
  font-size: 40px;
  background-color: lightgray;
}

button:hover {
  background-color: rgb(232, 232, 232);
}
button:active {
  background-color: rgb(178, 178, 178);
}

button:last-child {
  background-color: #DF974C;
  color: white;
}

button:last-child:hover {
  background-color: #e8aa67;
}
button:last-child:active {
  background-color: #C97C3D;
}

/* INPUT */
#input {
  width: 100%;
  font-size: 60px;
  text-align: right;
  font-family: 'Courier New', Courier, monospace;
  color: white;
  margin-top: 5%;
}

#zero {
  width: 74.8%;
}

#clear {
  width: 49.6%;
}
#row6 {
  margin-bottom: 0%;
  padding-bottom: 0%;
}