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

body{
  background-color: #2ab3ac;  
}

.calculator{
    width: 250px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 15px;
    padding: 10px;
    background-color: #000807;
}

.titulo{
    width: 250px;
    position: absolute;
    top: 28%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 15px;
    padding: 10px;
    color: white;
    font-weight: 100px;
    text-align: center;
    background-color: #000807;
    z-index: 99;
}

table td{
    display: inline-block;
}

.btn{
    margin: 3px;
    width: 50px;
    height: 40px;
    cursor: pointer;
    border: none;
    background-color: #0C1A21;
    color: #dfdfdf;
    font-size: 16px;
    transition:  all 50ms ease-in-out;
} 

.btn:hover{
    background-color: #162f3b;
}

.ac{
    background-color: #1b7269;
}

.ac:hover{
    background-color: #228f87;
}

.especial{
    background-color: #228f84;
}

.especial:hover{
    background-color: #20848d;
}

.igual{
    background-color: #1b7269;
}

.igual:hover{
    background-color: #25968a;
}

.result{
    height: 100px;
    color: #dfdfdf;
    text-align: right;
    font-size: 35px;
    word-wrap: break-word;
    border-bottom: 1px solid #25968a;
}