body {
    font-family: Arial, sans-serif;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #f0f2f5;
}

.calendar-container {
    width: 320px;
    background-color: #fff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

#currentMonthYear {
    font-size: 1.5em;
    font-weight: bold;
    color: #333;
}

button {
    background-color: #007bff;
    color: #fff;
    border: none;
    padding: 8px 12px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1em;
}

button:hover {
    background-color: #0056b3;
}

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

th, td {
    text-align: center;
    padding: 10px;
    border-radius: 5px;
}

th {
    color: #777;
    font-weight: normal;
}

td {
    color: #555;
    font-size: 1.1em;
}

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

td.today {
    background-color: #e0f2ff;
    border: 2px solid #007bff;
    font-weight: bold;
    color: #007bff;
}