.solar-calculator {
    background: #f9f9f9;
    padding: 20px;
    border-radius: 6px;
    max-width: 400px;
    margin: 20px auto;
    font-family: Arial, sans-serif;
}
.solar-calculator input {
    width: 100%;
    padding: 8px;
    margin-top: 5px;
    margin-bottom: 15px;
}
.solar-calculator button {
    background-color: #0073aa;
    color: #fff;
    border: none;
    padding: 10px 15px;
    cursor: pointer;
}
.solar-calculator button:hover {
    background-color: #005a87;
}