Code from the video

Alignment -

body, html {
align-content: center;
align-content: middle;
width = 100%;
height = auto;
}

.mylinks-body .link-text {
text-align: center;
margin-left: 0%;
margin-right: 0%;
}

.mylinks-body .mylinks, .mylinks-body .wp-mylinks-credits {
padding: 1.4rem 0rem;
}

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Avatar outline -

.mylinks .avatar {
background: #000;
}