*{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Orbitron', sans-serif;
}

html, body{
  height: 100%;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  background: linear-gradient(45deg, #0a0a0a, #3a4452);
}

.calculator{
    border: 2px solid #717377;
    padding: 20px;
    border-radius: 17px;
    background: transparent;
    box-shadow: 0px 3px 15px rgba(113, 115, 119, 1);
}

input{
    width: 320px;
    border: none;
    padding: 24px;
    margin: 10px;
    background: transparent;
    box-shadow: 0px 3px 15px rgba(84, 84, 84, 0.3);
    text-align: right;
    font-size: 40px;
    cursor: pointer;
    color: #ffffff;
}

input::placeholder{
    color: #ffffff;
}

button{
    border: none;
    width: 60px;
    height: 60px;
    margin: 10px;
    border-radius: 50%;
    background: transparent;
    color: #ffffff;
    font-size: 20px;
    box-shadow: -8px -8px 15px rgba(225, 225, 225, 0.3);
    cursor: pointer;
}

.equalbtn{
    background-color: #fb7c14;
}

.operator{
    color: #6dee0a;
}