#buyback-calculator {
    background: #000;
    border: 2px solid #d4af37;
    padding: 20px;
    max-width: 900px;
    margin: 20px auto;
    border-radius: 10px;
    color: #fff;
    font-family: Arial, sans-serif;
}

#buyback-calculator h2 {
    color: #d4af37;
    text-align: center;
    margin-bottom: 15px;
}

.updated-time {
    text-align: center;
    color: #d4af37;
    font-size: 14px;
    margin-bottom: 15px;
}

#calculator-table {
    width: 100%;
    border-collapse: collapse;
}

#calculator-table th {
    background: #111;
    color: #d4af37;
    padding: 10px;
    border: 1px solid #d4af37;
}

#calculator-table td {
    border: 1px solid #d4af37;
    padding: 10px;
    text-align: center;
}

#calculator-table td input,
#calculator-table td select {
    width: 90%;
    padding: 6px;
    border-radius: 5px;
    border: 1px solid #d4af37;
    background: #000;
    color: #fff;
    text-align: center;
}

.remove-item {
    background: #d4af37;
    color: #000;
    border: none;
    padding: 6px 12px;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
}

#add-item {
    background: #d4af37;
    color: #000;
    padding: 10px 20px;
    border: none;
    cursor: pointer;
    margin: 15px auto;
    display: block;
    border-radius: 8px;
    font-weight: bold;
    font-size: 16px;
}

#add-item:hover {
    background: #fff;
    color: #d4af37;
}

#total-buyback {
    color: #d4af37;
}

@media (max-width: 600px) {
    #calculator-table th,
    #calculator-table td {
        padding: 6px;
    }

    #calculator-table td input,
    #calculator-table td select {
        width: 100%;
    }
}