body {
    font-family: 'Poppins', sans-serif;
    background-color: #ffe6a7;
    padding: 20px;
    max-width: 500px;
    margin: auto;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

h1 {
    text-align: center;
    color: #99582a;
}

div {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
}

input[type="number"] {
    width: 100%;
    padding: 8px;
    box-sizing: border-box;
    border: 1px solid #ffffff;
    border-radius: 5px;
}

.button-group {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 15px;
}

.btn-operation {
    flex: 1;
    padding: 12px;
    background-color: #99582a;
    color: #ffffff;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
}

#hasil {
    font-weight: bold;
    padding: 15px;
    background-color: #432818;
    color: #ffffff;
    border-radius: 5px;
}

.btn-reset {
    width: 20%;
    padding: 8px;
    font-size: 0.9em;
    background-color: #6f1d1b;
    color: #ffffff;
    border: none;
    border-radius: 5px;
}