body {
  font-family: sans-serif;
  background-color: #2f3640;
}

button {
  width: 6em;
  height: 3.5em;
  border: none;
  border-radius: 20px;
  box-shadow: 2px 2px 6px #718093, -2px -2px 6px #f5f6fa;
  margin: 0.6em 0.4em;
  font-weight: 800;
  font-size: 1.25em;
}

button:hover {
  opacity: 0.8;
}

button:active {
  outline: none;
  box-shadow: 2px 2px 6px #718093 inset, -2px -2px 6px #f5f6fa inset;
}

button:focus {
  outline: none;
}

.calc {
  width: 600px;
}

.calcScreen {
  width: 100%;
  height: 6em;
}

.calc__screen {
  display: inline-block;
  position: relative;
  width: 68%;
  height: 80%;
  color: #dcdde1;
  text-align: right;
  font-size: 2.5em;
  margin-right: 0.5em;
  padding: 15px 0px 0px 0px;
  font-weight: 900;
}

.calc__reset {
  position: absolute;
  background-color: #7f8fa6;
  color: #dcdde1;
}

.numbers {
  display: inline-block;
  width: 71%;
}

.numbers button {
  background-color: #353b48;
  color: #dcdde1;
}

.numbers button.zero {
  width: 13.25em;
}

.operators {
  display: inline-block;
  position: relative;
  width: 24%;
}

.operators button {
  background-color: #e84118;
  color: #f5f6fa;
}

.operators .equal {
  background-color: #353b48;
  color: #dcdde1;
  position: absolute;
  right: 155px;
}