.calendar-container {
            max-width: 300px;
            margin: 20px auto;
            font-family: Arial, sans-serif;
        }
        
        .calendar-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            background-color: #4CAF50;
            color: white;
            padding: 10px;
            border-radius: 5px 5px 0 0;
            gap: 10px;
        }
        
        .calendar-header select {
            padding: 5px;
            border: none;
            border-radius: 3px;
            cursor: pointer;
        }
        
        .calendar-table {
            width: 100%;
            border-collapse: collapse;
        }
        
        .calendar-table th {
            background-color: #f2f2f2;
            padding: 8px;
            text-align: center;
        }
        
        .calendar-table td {
            padding: 8px;
            text-align: center;
            border: 1px solid #ddd;
            cursor: pointer;
        }
        
        .calendar-table td:hover {
            background-color: #f5f5f5;
        }
        
        .sunday {
            color: red;
        }
        
        .today {
            background-color: #e8f5e8;
            font-weight: bold;
        }
        
        .selected {
            background-color: #4CAF50;
            color: white;
        }
        
        .date-display {
            margin: 20px auto;
            text-align: center;
            font-size: 18px;
            font-weight: bold;
            padding: 10px;
            background-color: #f0f8f0;
            border-radius: 5px;
        }