body {
    --text-color: #222;
    --bg-color: #fff;
}
body.dark-theme {
    --text-color: #eee;
    --bg-color: #121212;
}
@media (prefers-color-scheme: dark) {
    /* defaults to dark theme */
    body {
        --text-color: #eee;
        --bg-color: #121212;
    }
    body.light-theme {
        --text-color: #222;
        --bg-color: #fff;
    }
}
body {
    background-color: var(--bg-color);
}
.main {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
    height: -webkit-fill-available;
    height: fill-available;
    background-color: var(--bg-color)
}
.tagline {
    font-family: 'open sans';
    font-size: 22px;
    color: var(--text-color);
}
.contact {
    position: fixed;
    bottom: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
}
.icon {
    width: 100px;
    height: 100px;
    margin: 30px;
    border-radius: 50%;
    overflow: hidden;
}