Centering an <li> element without taking bullet point into account
It is not actually the space taken up by the bullet points - ul elements have a default padding-left - just reset it to zero:
Ideally you should just reset the padding instead of negative margins - see demo below:
#square {
position: fixed;
width: 350px;
height: 100%;
top: 0px;
left: 0px;
background-color: rgb(230, 255, 230);
}
ul {
position: relative;
bottom: 30px;
display: flex;
flex-direction: column;
align-items: center;
list-style-type: none; /* hide bullet points */
padding-left: 0; /* ADDED */
}
li {
margin-top: 40px;
padding-left: 75px;
border-color: white;
border-width: 2px;
border-style: solid;
padding: 5px 20px 5px 20px;
background-color: green;
border-radius: 10px;
width: 100px;
text-align: center;
}
.navlink {
text-decoration: none;
color: white;
}<div id="square">
<ul>
<li><a class="navlink" href="#">Introduction</a></li>
<li><a class="navlink" href="#">Middle</a></li>
<li><a class="navlink" href="#">End</a></li>
</ul>
</div>Your given code almost ok just use one single line into style sheet in li style use below line
list-style-type: none;
New li style look like
li {
margin-top: 40px;
padding-left: 75px;
list-style-type: none;
border-color: white;
border-width: 2px;
border-style: solid;
padding: 5px 20px 5px 20px;
background-color: green;
border-radius: 10px;
width: 100px;
text-align: center;
}