.modal {
            display: none;
            position: fixed;
            z-index: 1;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0,0,0,0.4);
        }
        
        .modal-content {
            background-color: #fefefe;
            margin: 5% auto;
            padding: 20px;
            border: 1px solid #888;
            width: 900px;
            height: 500px;
            border-radius: 5px;
            box-shadow: 0 4px 8px 0 rgba(0,0,0,0.2);
            overflow: auto;
        }
        
        .modal-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 1px solid #ddd;
        }
        
        .modal-title {
            font-size: 20px;
            font-weight: bold;
        }
        
        .close {
            color: #aaa;
            font-size: 28px;
            font-weight: bold;
            cursor: pointer;
        }
        
        .close:hover {
            color: black;
        }
        
        table {
            width: 100%;
            border-collapse: collapse;

        }
        
        th, td {
            border: 1px solid #ddd;
            padding: 8px;
            text-align: left;
        }
        
        th {
            background-color: #f2f2f2;
            font-weight: bold;
        }
        
        tr:nth-child(even) {
            background-color: #f9f9f9;
        }
        
        tr:hover {
            background-color: #f1f1f1;
        }
        
        .action-btn {
            padding: 4px 8px;
            margin-right: 5px;
            border: none;
            border-radius: 3px;
            cursor: pointer;
            font-size: 12px;
        }
        
        .edit-btn {
            background-color: #2196F3;
            color: white;
        }
        
        .delete-btn {
            background-color: #f44336;
            color: white;
        }
        
        .form-group {
            margin-bottom: 15px;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 5px;
            font-weight: bold;
        }
        
        .form-group input {
            width: 100%;
            padding: 8px;
            border: 1px solid #ddd;
            border-radius: 4px;
            box-sizing: border-box;
        }
        
        .modal-footer {
            margin-top: 20px;
            text-align: center;
            padding-top: 10px;
            border-top: 1px solid #ddd;
        }
        
        .error-message {
            color: #f44336;
            margin-top: 10px;
            text-align: center;
        }
        
        .status-waiting {
            color: #FF9800;
            font-weight: bold;
        }
        
        .status-checkin {
            color: #4CAF50;
            font-weight: bold;
        }
        
        .status-not-started {
            color: #2196F3;
            font-weight: bold;
        }
        
        .status-ended {
            color: #9E9E9E;
            font-weight: bold;
        }
        
        .footer-buttons {
            display: flex;
            justify-content: center;
            gap: 10px;
        }