.calc {
 font-family: Arial, sans-serif;
 display: flex;
 justify-content: center;
 align-items: center;
}
.calculator {
 width: 400px;
 background-color: #fff;
 border-radius: 10px;
 box-shadow: 0px 4px 10px rgba(0,0,0,0.2);
 padding: 20px;
}
.display {
 width: 100%;
 height: 50px;
 text-align: right;
 font-size: 1.5rem;
 margin-bottom: 20px;
}
.buttons {
 display: grid;
 grid-template-columns: repeat(4, 1fr);
 gap: 10px;
}
.buttons button {
 padding: 15px;
 font-size: 1.5rem;
 border-radius: 5px;
 border: none;
 background-color: #00B16A;
 color: white;
 font-weight:600;
}
.buttons button:hover {
 background-color: #0288d1;
}
#divide{
font-size:22px;
}
#dot{
font-size:22px;
}
#back{
font-size:22px;
}