.igst-calculator-card {
    max-width: 600px;
    margin: 20px auto;
    padding: 20px;
    border: 1px solid #ccc;
    border-radius: 8px;
    background: #f9f9f9;
    display: flex;
    flex-direction: column;
    gap: 15px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.input-group label {
    font-size: 14px;
    font-weight: bold;
    color: #333;
}

.input-group input {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

.input-group input:focus {
    outline: none;
    border-color: #0073e6;
    box-shadow: 0 0 4px rgba(0, 115, 230, 0.4);
}

.radio-group {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
}

.radio-group label {
    display: inline-block;
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    cursor: pointer;
    background: #fff;
    font-size: 14px;
}

.radio-group input[type="radio"] {
    display: none;
}

.radio-group input[type="radio"]:checked + label {
    background: #0073e6;
    color: #fff;
    border-color: #005bb5;
}

.result-section {
    margin-top: 20px;
    padding: 15px;
    border-top: 1px solid #ddd;
    background: #fff;
    font-size: 16px;
    color: #333;
    line-height: 1.5;
}

.result-section h3 {
    margin-bottom: 10px;
    font-size: 18px;
    font-weight: bold;
    color: #0073e6;
}

.result-section p {
    margin: 5px 0;
}

#first-month-igst, #last-month-igst {
    font-weight: bold;
    color: #0073e6;
}

@media (max-width: 768px) {
    .igst-calculator-card {
        padding: 15px;
    }

    .input-group input {
        font-size: 14px;
    }

    .radio-group label {
        font-size: 13px;
    }

    .result-section {
        font-size: 14px;
    }

    .result-section h3 {
        font-size: 16px;
    }
}