body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f8f9fa;
    margin: 0;
}

.calendar {
    text-align: center;
}

.days-container {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 10px;
    margin-top: 20px;
}

.day {
    background-color: #007bff;
    color: white;
    padding: 20px;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.day:hover {
    background-color: #0056b3;
}

.hidden-message {
    display: none;
    margin-top: 10px;
    font-size: 16px;
}