*{
 font-family: Poppins;
}
body {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color:rgb(225, 247, 247);
}
.calculator h3{
    color: white;
    text-align: center;
}
.calculator {
    background-color: #111111;
    box-shadow: 0px 10px 10px #111111;
    border-radius: 10px;
    padding: 25px;
    width: 250px;
}

.display {
    width: 90%;
    font-size: 1.5em;
    padding: 10px;
    margin-bottom: 10px;
    text-align: right;
    background: none;
    color: white;
    border-radius: 10px;
    border:1px solid rgb(78, 78, 78);
}

.buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

button {
    height:55px;
    font-size: 1.2em;
    cursor: pointer;
    color: white;
    background:none;
    border-radius: 50%;
    border: none;
}
button:hover{
    background-color:rgb(78, 78, 78) ;
}
.operator {
    background-color: #f0ad4e;
    color:black;
    border-radius: 50%;
    border: none;
}

.equals {
    color: white;
    background-color:rgb(78, 78, 78) ;
    grid-column: span 2;
    border-radius: 10px;
    box-shadow: 0px 0px 5px black;
}
.equals:hover{
    background-color: #5cb85c;
}

.clear {
    color: white;
    background-color:rgb(78, 78, 78) ;
    grid-column: span 2;
    box-shadow: 0px 0px 5px black;
    border-radius: 10px;
}
.clear:hover{
    background-color: #d9534f;
}