body, html {
    height: 100%;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: Arial, sans-serif;
    background: #0f0f13;
    overflow: hidden;
}

main {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}


a {
    color: #fff;
    text-decoration: none;
    font-size: 16px;
}

a:hover {
    text-decoration: underline;
}

.avatar {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 10px;
    height: 128px;
    width: 128px;
    border: 3px solid #0000;
    border-radius: 12px;
    background: linear-gradient(#131219, #131219) padding-box, linear-gradient(
            var(--angle),
            #070707,
            #687aff
        ) border-box;
    animation: 8s rotate linear infinite;
}


@keyframes rotate {
    to {
        --angle: 360deg;
    }
}

@property --angle {
    syntax: "<angle>";
    initial-value: 0deg;
    inherits: false;
}