body {
    margin: 0px;
    position: absolute;
    left: 0px;
    top: 0px;
    width: 100vw;
    height: 100vh;
}

fig-window {
    display: block;
    position: absolute;
}

fig-header {
    position: absolute;
    text-align: center;
    border-radius: 100px;
    border-style: solid;
    border-color: silver;
    border-width: 5px;
    background: linear-gradient(0deg, rgba(89,89,89,1) 35%, rgba(158,158,158,1) 100%);
    top: 1em;
    left: 33vw;
    width: 33vw;
}

fig-header:hover {
  filter: brightness(150%);
}