* {
  box-sizing: border-box;
  min-height: 70%;
  max-height: 80%

}

.container {
  width: 80%;
  align-items: center;
  min-height: 100%;
  margin: auto;
  font-family: 'Roboto', sans-serif;
  /* padding-top: 50%; */
}

.calc-body {

  margin: auto;
  min-height: 100%;
  border: solid 1px #3A4655;
  box-shadow: 0 8px 50px -7px black;
  min-width: 60%;
  max-width: 70%;
}

.calc-screen {
  background: #3A4655;
  min-width: 60%;
  min-height: 150px;
  padding: 20px;
}

.calc-operation {
  text-align: right;
  color: #727B86;
  font-size: 21px;
  padding-bottom: 10px;
  border-bottom: dotted 1px;
}

.calc-typed {
  margin-top: 20px;
  font-size: 45px;
  text-align: right;
  color: #fff;
}

.calc-button-row {
  min-width: 60%;
  background: #3C4857;
}

.button {
  width: 25%;
  background: #425062;
  color: #fff;
  padding: 20px;
  display: inline-block;
  font-size: 25px;
  text-align: center;
  vertical-align: middle;
  margin-right: -4px;
  border-right: solid 2px #3C4857;
  border-bottom: solid 2px #3C4857;
  transition: all 0.2s ease-in-out;
}

.button.l {
  color: #AEB3BA;
  background: #404D5E;
}

.button.c {
  color: #D95D4E;
  background: #404D5E;
}

.button:hover {
  background: #E0B612;
  transform: rotate(5deg);
}

.button.c:hover,
.button.l:hover {
  background: #E0B612;
  color: #fff;
}

.blink-me {
  color: #E0B612;
}

.chg{
  color: red;
}

#footBase{
  color: #878787;
  text-align: center;
  padding-top: 20px;
  font-family: Courier New,Courier,Lucida Sans Typewriter,Lucida Typewriter,monospace;
  tab-size: 20%;

}
#footBase:hover{
  transform: rotateY(180deg);
}

@media only screen and (max-width: 500px){

  .container {
    padding-top: 20%;
    min-width:100%;
  }

}