.gift-card-calculator {
    max-width: 400px;
    margin: 20px auto;
    padding: 20px;
    background: #f9f9f9;
    border-radius: 12px;
    box-shadow: 0 3px 8px rgba(0,0,0,0.1);
    font-family: Arial, sans-serif;
}

.gift-card-calculator h3 {
    margin-bottom: 15px;
    text-align: center;
    color: #333;
}

.gift-card-calculator label {
    display: block;
    margin-top: 12px;
    font-weight: bold;
    color: #444;
}

.gift-card-calculator select,
.gift-card-calculator input {
    width: 100%;
    padding: 10px;
    margin-top: 6px;
    border: 1px solid #ccc;
    border-radius: 8px;
    font-size: 14px;
    background: #fff;
}

.gift-card-calculator select:disabled,
.gift-card-calculator input:disabled {
    background: #eee;
    cursor: not-allowed;
}

.result-box {
    margin-top: 20px;
    padding: 12px;
    background: #eafaf1;
    border: 1px solid #c1eac5;
    border-radius: 8px;
    text-align: center;
    font-size: 16px;
    color: #2c662d;
    font-weight: bold;
}