body {
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
    margin: 0;
    padding: 0;
}

h1 {
    text-align: center;
    padding: 20px 0;
    background-color: #007bff;
    color: white;
    margin: 0;
}

.months {
    list-style-type: none;
    padding: 20px 0;
    text-align: center;
    background-color: white;
    margin: 0;
}

.months li {
    display: inline;
    margin: 0 10px;
}

.months a {
    text-decoration: none;
    color: #007bff;
    font-weight: bold;
    font-size: 1.2em;
}

.months a:hover {
    text-decoration: underline;
}

.calendar {
    margin: 20px auto;
    width: 80%;
    max-width: 600px;
    border-collapse: collapse;
    background-color: white;
    border: 1px solid #ddd;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

.calendar:target {
    display: block;
}

.calendar h2 {
    text-align: center;
    padding: 10px 0;
    background-color: #007bff;
    color: white;
    margin: 0;
}

.calendar table {
    width: 100%;
    border-collapse: collapse;
}

.calendar th, .calendar td {
    padding: 10px;
    text-align: center;
    border: 1px solid #ddd;
}

.calendar th {
    background-color: #f4f4f4;
}

.calendar td {
    height: 50px;
}

.calendar td.empty {
    background-color: #f9f9f9;
}