html, body { height: 100%; margin: 0; }
body{
    display:grid;
    place-items:center;
    background: radial-gradient(900px 600px at 50% 35%, rgba(255,105,180,.12), transparent 60%),
                linear-gradient(160deg, #0b0b14, #1a1026);
    overflow:hidden;
}

button {
  -webkit-tap-highlight-color: transparent;
}

button {
  -webkit-touch-callout: none;
}