<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1600 1000"
     width="1600" height="1000" role="img" aria-label="">
  <!-- Built to survive the scrim rather than to look right on its own.
       The chat lays its own ground over any background at the opacity that
       keeps text at WCAG AA, so roughly a third of this reaches the eye. A
       picture composed for full brightness arrives as a black rectangle, so
       everything here is lighter and larger than it would be as art. -->
  <defs>
    <linearGradient id="sky" x1="0" y1="0" x2="0.15" y2="1">
      <stop offset="0" stop-color="#4c3f9e"/>
      <stop offset="0.5" stop-color="#5b4bc4"/>
      <stop offset="1" stop-color="#241d52"/>
    </linearGradient>
    <radialGradient id="glow" cx="0.5" cy="0.5" r="0.5">
      <stop offset="0" stop-color="#f5f3ff" stop-opacity="0.95"/>
      <stop offset="0.45" stop-color="#c4b5fd" stop-opacity="0.45"/>
      <stop offset="1" stop-color="#a78bfa" stop-opacity="0"/>
    </radialGradient>
    <linearGradient id="ridge" x1="0" y1="0" x2="0" y2="1">
      <stop offset="0" stop-color="#2e2668"/>
      <stop offset="1" stop-color="#140f33"/>
    </linearGradient>
  </defs>

  <rect width="1600" height="1000" fill="url(#sky)"/>
  <circle cx="1210" cy="250" r="440" fill="url(#glow)"/>
  <circle cx="1210" cy="250" r="96" fill="#ffffff"/>

  <g fill="#ffffff">
    <circle cx="180" cy="130" r="6"/>
    <circle cx="420" cy="86" r="4.5" opacity="0.9"/>
    <circle cx="700" cy="190" r="5" opacity="0.8"/>
    <circle cx="300" cy="330" r="4" opacity="0.75"/>
    <circle cx="900" cy="110" r="6.5"/>
    <circle cx="1500" cy="430" r="4.5" opacity="0.8"/>
    <circle cx="560" cy="430" r="4" opacity="0.7"/>
    <circle cx="1040" cy="370" r="4.5" opacity="0.75"/>
    <circle cx="120" cy="540" r="5" opacity="0.7"/>
    <circle cx="820" cy="300" r="3.5" opacity="0.6"/>
  </g>

  <!-- A low horizon, so the conversation sits in the sky and not on the
       ground. -->
  <path d="M0 780 C 260 720, 420 826, 700 792 C 980 758, 1180 832, 1600 762
           L1600 1000 L0 1000 Z" fill="url(#ridge)"/>
  <path d="M0 848 C 300 804, 520 898, 820 862 C 1120 826, 1340 900, 1600 842
           L1600 1000 L0 1000 Z" fill="#0d0925" opacity="0.9"/>
</svg>