body {
    font-family: ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,segoe ui,Roboto,helvetica neue,Arial,noto sans,sans-serif,apple color emoji,segoe ui emoji,segoe ui symbol,noto color emoji;
    background-color: #182533;
    color: #fff;
    margin: 0;
    padding: 0;
}

main,
footer {
    width: 400px;
    margin: 0 auto;
    text-align: center;
}

main {
    margin-top: 50px;
}

.avatar {
    border-radius: 50%;
    width: 200px;
}

.tagline {
    margin-bottom: 30px;
}

.btn {
    color: #fff;
    text-decoration: none;
    display: block;
    max-width: 250px;
    width: 100%;
    background-color: black;
    margin: 0 auto;
    margin-bottom: 10px;
    border-radius: 5px;
    padding: 10px 0;

    transition: opacity 0.3s ease-in-out;
}
.btn:hover {
    opacity: 0.8;
}

.btn-github {
    background-color: #383738;
}
.btn-linkedin {
    background-color: #0077b5;
}
.btn-bluesky {
    background-color: #0085ff;
}
.btn-instagram {
    background-color: #833ab4;
    background: linear-gradient(
        to right,
        #833ab4,#fd1d1d,#fcb045
    );
}
.btn-irunalaska {
    background-color: #0066b2;
}
.btn-ultrasignup {
    background-color: #019a56;
}

.fa-brands,
.fa-solid {
    padding-right: 10px;
}

footer {
    margin-top: 100px;
    font-size: 0.9em;
    color: #bbb;
}