Make Text Bolder

It doesn’t seem I have a problem but I need to make this more bold

.txt {
     font-weight: bolder;
     justify-content: left;
     text-align: left;
     margin-top: 100px;
    /* font-family: 'Redwinger Personal Use', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    */
     color: rgb(0, 0, 0);
     margin-bottom: 750px;
     margin-left: 25px;
}

I tried the property font-weight:"bolder" but I want it more bold. Is there any way?

>Solution :

.txt {
    font-weight: 900;
    justify-content: left;
    text-align: left;
    margin-top: 100px;
    color: rgb(0, 0, 0); 
    margin-bottom: 750px;
    margin-left: 25px;                                
}

You can use font-weight