.tampung {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    
    margin: 0;
    background-color: #ffffff;
    
    
}

#nama{
    color: #fff;
}

h3{
    text-align: center;
    margin: auto;
    background-color: #130654;;
    width: 200px;
    font-size: 30px;
    border-radius: 99px;
    -webkit-border-radius: 99px;
    -moz-border-radius: 99px;
    -ms-border-radius: 99px;
    -o-border-radius: 99px;
}

.calculator {
    background: #fff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    width: 300px;
}

#result {
    width: 100%;
    height: 50px;
    font-size: 1.5rem;
    margin-bottom: 10px;
    text-align: right;
    border: 1px solid #ccc;
    border-radius: 5px;
    padding: 5px;
}

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

button {
    height: 50px;
    font-size: 1.2rem;
    border: none;
    border-radius: 5px;
    background: #130654;;
    color: white;
    cursor: pointer;
    transition: background 0.3s ease;
}

button:hover {
    background: #0056b3;
}

button.zero {
    grid-column: span 2;
}

button:active {
    transform: scale(0.95);
}