body{
    margin: 0;
    padding: 0;
    font-family: 'Roboto', sans-serif;
    background-color: #f8f9fa;

}
        .container {
            max-width: 800px;
            margin: 20px auto;
            padding: 20px;
            background-color: #f5f5f5;
            border-radius: 12px;
        }
        input{
            padding: 10px;
            border-radius: 12px;
            border: 1px solid rgba(0, 0, 0, 0.205);
            width: 100%;    
            margin-bottom: 10px;
            font-size: 16px;
            outline: none;
            background-color: white;
            color: black;
            transition: all 0.3s ease;
        }
        .controls {
            margin-bottom: 20px;
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        
        .btn {
            padding: 10px 16px;
            border: none;
            border-radius: 12px;
            background-color: #1e1f1e;
            font-weight: 100;
            color: white;
            cursor: pointer;
            transition: background-color 0.3s;
        }
        
        .btn:hover {
            background-color: #3b3b3b;
        }
        
        .btn:disabled {
            background-color: #cccccc;
            cursor: not-allowed;
        }
        
        .queue-container {
            border: 2px solid #0a7232;
            border-left-color: transparent;
            border-right-color: transparent;
            margin-top: 20px;
            min-height: 100px;
            display: flex;
            align-items: center;
            overflow-x: auto;
        }
        
        .queue-element {
            width: 60px;
            height: 60px;
            border: 0.5px solid #3838382d;
            margin-right: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            animation: fadeIn 0.5s;
            background-color: #f7f7f7;
            color: rgb(0, 0, 0);
            border-radius: 12px;
        }
        
        .message {
            margin-top: 20px;
            padding: 10px;
            border-radius: 4px;
            display: none;
        }
        
        .success {
            background-color: #dff0d8;
            color: #3c763d;
            border: 1px solid #d6e9c6;
        }
        
        .error {
            background-color: #f2dede;
            color: #a94442;
            border: 1px solid #ebccd1;
        }
        
        @keyframes fadeIn {
            from { opacity: 0; transform: translateX(-20px); }
            to { opacity: 1; transform: translateX(0); }
        }
        
        #input-container {
            margin-bottom: 10px;
        }
        
        #element-input {
            padding: 8px;
            font-size: 16px;
            width: 100px;
        }