.btn-default {
  width: 60px;
  height: 50px;
  margin-top: 3px;
}

.btn-ac {
  background: blue;
  border-color: black;
}

.btn-ac:hover {
  background: #0000CC;
  border-color: black;
}

.btn-default.btn-ac:active {
  background: #0000AA;
  border-color: black;
}

.btn-ac:focus {
  background: #0000CC;
  border-color: black;
}

.btn-ce {
  background: red;
  border-color: black;
}

.btn-ce:hover {
  background: #CC0000;
  border-color: black;
}

.btn-default.btn-ce:active {
  background: #AA0000;
  border-color: black;
}

.btn-ce:focus {
  background: #CC0000;
  border-color: black;
}

.btn-zero {
  width: 124px;
  position: relative;
  top: -54px;
  left: -32px;
}

.btn-dot {
  position: relative;
  top: -54px;
  left: -32px;
}

.btn-equals {
  height: 104px;
  background: red;
  border-color: black;
}

.btn-equals:hover {
  background: #CC0000;
  border-color: black;
}

.btn-default.btn-equals:active {
  background: #AA0000;
  border-color: black;
}

.btn-equals:focus {
  background: #CC0000;
  border-color: black;
}

.center {
  margin: auto;
}

p {
  text-align: right;
}

.calcBody {
  width: 310px;
  height: 450px;
  background: black;
  border-radius: 10%;
  box-shadow: 10px 10px 20px #888888, 10px 10px 20px gray inset;
  margin-bottom: 2cm;
  margin-top: 2cm;
}