.calculator-container {
    background-color: white;
    width: 80%;
    max-width: 400px;
    margin: 20px auto;
    padding: 20px;
    border-radius: 20px;
    box-shadow: 0 0 5px #ccc;
}
.input-container {
    margin-bottom: 15px;
}
.input-container label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}
.input-container input,
.input-container select {
    width: 100%;
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 5px;
    box-sizing: border-box;
}
#button-container {
    text-align: center;
    margin: 20px 0;
}
#button-container button {
    padding: 10px 20px;
    border: 0;
    color: #fff;
    font-size: 16px;
    background: #084288;
    border-radius: 3px;
    margin: 0 10px;
    cursor: pointer;
}
#button-container button:hover {
    background: #434c6d;
}
#result {
    margin-top: 20px;
    padding: 15px;
    background: #f9f9f9;
    border-radius: 8px;
    min-height: 20px;
}