.gccc-calculator {
    margin: 1rem auto;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 6px;
    background: #fff;
    font-family: Arial, sans-serif;
}
.gccc-calculator .gccc-input-row {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    margin-bottom: 0.5rem;
    flex-wrap: wrap;
}
@media (max-width: 600px) {
    .gccc-calculator .gccc-input-row {
        flex-direction: column;
        align-items: stretch;
    }
}
.gccc-calculator .gccc-input-row label {
    flex: 0 0 auto;
    font-weight: 600;
    white-space: nowrap;
}
.gccc-calculator .gccc-input-row select,
.gccc-calculator .gccc-input-row input[type=number] {
    flex: 1;
    padding: 0.4rem;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 0.9rem;
}
.gccc-calculator .gccc-checkbox-group {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    margin-bottom: 0.5rem;
}
.gccc-calculator .gccc-checkbox-group input[type=checkbox] {
    appearance: none;
    width: 24px;
    height: 24px;
    border: 1px solid #ccc;
    border-radius: 4px;
    position: relative;
    cursor: pointer;
    margin-right: 10px;
}
@media (max-width: 600px) {
    .gccc-calculator .gccc-checkbox-group input[type=checkbox] {
        margin-top: 10px;
    }
}
.gccc-calculator .gccc-checkbox-group input[type=checkbox]:checked::before {
    content: '\2713';
    position: absolute;
    top: 2px;
    left: 5px;
    font-size: 16px;
    color: #0073aa;
}
.gccc-calculator .gccc-checkbox-group label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 0.9rem;
}
#gccc_result {
    margin-top: 1rem;
    padding: 0.5rem;
    background: #f5f5f5;
    border-radius: 4px;
    text-align: center;
    font-size: 24px;
    border: 1px solid #ccc;
}