.dd-calculator {
    max-width: 600px;
    margin: auto;
    background: #fff;
    padding: 25px;
    border-radius: 10px;
    box-shadow: rgba(99, 99, 99, 0.2) 0px 2px 8px 0px;
}

.dd-calculator h2 {
    text-align: center;
    margin-bottom: 20px;
}

/* Two column layout */
.dd-row {
    display: flex;
    gap: 15px;
}

.dd-field {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.dd-field input,
.dd-field select {
    width: 100%;
    padding: 10px;
    margin-bottom: 15px;
    border-radius: 6px;
    border: 1px solid #ccc;
    font-size: 16px;
}

.dd-button {
    width: 100%;
    padding: 12px;
    background: #000;
    color: #fff;
    font-size: 18px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
}

.dd-button:hover {
    background: #231c1c
}

.dd-result {
    margin-top: 25px;
    padding: 20px;
    background: #f0f8ff;
    border-radius: 8px;
    display: none;
}

.dd-result h3 {
    margin-top: 0;
}

.dd-result p {
    margin: 8px 0;
    font-size: 16px;
}

@media (max-width:600px) {
    .dd-row {
        flex-direction: column;
    }
}