.date-calculator {
    max-width: 400px;
    margin: 0 auto;
    padding: 20px;
    border: 1px solid #ddd;
    border-radius: 10px;
    background-color: #f9f9f9;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.date-calculator h2 {
    text-align: center;
    color: #333;
    margin-bottom: 20px;
}

.date-calculator form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

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

.date-calculator label {
    font-weight: bold;
    color: #555;
}

.date-calculator input,
.date-calculator select {
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 16px;
}

.date-calculator button {
    padding: 10px;
    background-color: #0073aa;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
}

.date-calculator button:hover {
    background-color: #005177;
}

.result {
    margin-top: 20px;
    padding: 10px;
    background-color: #e9f7ff;
    border: 1px solid #0073aa;
    border-radius: 5px;
    text-align: center;
    font-size: 18px;
    color: #333;
}