#installment-calculator {
    background-color: #f9f9f9;
    border-radius: 10px;
    padding: 20px;
    max-width: 600px;
    margin: 0 auto;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    font-family: Arial, sans-serif;
}

#installment-calculator h3 {
    font-size: 24px;
    color: #333;
    margin-bottom: 20px;
    text-align: center;
}

#installment-calculator p {
    font-size: 16px;
    color: #555;
    margin-bottom: 20px;
    text-align: center;
}

#installment-calculator label {
    font-size: 16px;
    color: #333;
    margin-bottom: 10px;
    display: block;
    margin-top: 15px;
}

#installment-calculator input[type="range"] {
    width: 100%;
    height: 10px;
    border-radius: 5px;
    background: #ddd;
    -webkit-appearance: none;
    outline: none;
    margin-bottom: 20px;
    cursor: pointer;
}

#installment-calculator input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: #4CAF50;
    border-radius: 50%;
    cursor: pointer;
}

#installment-calculator input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: #4CAF50;
    border-radius: 50%;
    cursor: pointer;
}

#installment-calculator .value-display {
    font-size: 18px;
    color: #333;
    margin-top: -10px;
    text-align: center;
}

#installment-calculator #monthly-payment {
    font-size: 24px;
    color: #E91E63;
    font-weight: bold;
    margin-top: 20px;
    text-align: center;
}

/* برای اسلایدرها */
#months-value, #downpayment-value {
    font-size: 18px;
    color: #333;
    font-weight: bold;
    margin-left: 10px;
}

/* استایل برای ساختار و فاصله‌بندی */
#installment-calculator br {
    line-height: 1.5;
}