*{
    margin: 0;
    padding: 0;
 }
 body{
    background-color: #F4F4F4;
    display: flex;
    justify-content: center;
gap: 12px; 
    align-items: center;
    height: 100vh
 }
.calculator{
 padding: 20px;
    background-color: white;
   border-radius: 10px;
   box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    width: 260px;
    display: flex;
    flex-direction: column;
}
input[type="text"]{
    width: 100%;
    height: 50px;
  font-size: 1.2rem;
    padding: 5px;
         text-align: right;
        margin-bottom: 10px;
        padding: 5px;
        border: 1px solid #ccc;
        border-radius: 5px;
}
.buttons{
    display: grid;
    grid-template-columns: repeat(4,1fr);
    gap: 10px;
}
button{
    font-size: 1.2rem;
    padding: 12px;
    border: none;
    background: #eee;
    border-radius: 5px;
cursor: pointer;    
}
button:hover{
    background-color: #DDDDDD;
}
.equal{
    background: #28a745;
    color: white;
}
.equal:hover{
    background-color: #218838;
}