#cpc-container {
    padding: 20px;
    border: 1px solid #ccc;
    border-radius: 10px;
    background: #f9f9f9;
    box-shadow: 0px 4px 6px rgba(0, 0, 0, 0.1);
}
.cpc-flex-container {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}
.cpc-column {
    flex: 1;
    min-width: 300px;
}
.cpc-input-column hr {
    margin: 20px 0;
}
.cpc-results-column {
    padding-left: 20px;
    border-left: 1px solid #ddd;
}
.cpc-column label, .cpc-column h3 {
    display: block;
    margin-top: 15px;
    margin-bottom: 5px;
    font-weight: bold;
}
.cpc-column input[type="text"],
.cpc-column input[type="number"],
.cpc-column select {
    width: 100%;
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}
.cpc-hidden {
    display: none;
}
.cpc-custom-fees {
    display: none;
    margin-top: 10px;
    padding: 10px;
    border: 1px dashed #ccc;
    border-radius: 5px;
}
.cpc-button-group {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}
.cpc-button {
    width: 100%;
    padding: 10px;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
}
.cpc-button-calculate {
    background: #28a745;
}
.cpc-button-reset {
    background: #6c757d;
}
.cpc-results-final {
    font-weight: bold;
}

/* --- ADDED: Responsive layout for smaller screens --- */
@media (max-width: 768px) {
    .cpc-flex-container {
        flex-direction: column;
    }
    .cpc-results-column {
        padding-left: 0;
        border-left: none;
        margin-top: 20px;
        padding-top: 20px;
        border-top: 1px solid #ddd;
    }
}