<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 120 120" fill="none">
  <rect width="120" height="120" rx="24" fill="#1a1a1a"/>
  <!-- Peptide chain / molecular bond motif -->
  <circle cx="38" cy="44" r="8" fill="#6366f1" opacity="0.9"/>
  <circle cx="60" cy="34" r="6" fill="#818cf8" opacity="0.7"/>
  <circle cx="78" cy="46" r="9" fill="#6366f1" opacity="0.9"/>
  <circle cx="50" cy="68" r="7" fill="#818cf8" opacity="0.7"/>
  <circle cx="72" cy="74" r="6" fill="#a5b4fc" opacity="0.5"/>
  <!-- Bonds -->
  <line x1="44" y1="40" x2="55" y2="36" stroke="#818cf8" stroke-width="2.5" stroke-linecap="round" opacity="0.5"/>
  <line x1="65" y1="36" x2="72" y2="42" stroke="#818cf8" stroke-width="2.5" stroke-linecap="round" opacity="0.5"/>
  <line x1="42" y1="50" x2="46" y2="63" stroke="#818cf8" stroke-width="2.5" stroke-linecap="round" opacity="0.5"/>
  <line x1="55" y1="72" x2="67" y2="74" stroke="#818cf8" stroke-width="2.5" stroke-linecap="round" opacity="0.4"/>
  <line x1="74" y1="54" x2="54" y2="64" stroke="#818cf8" stroke-width="2.5" stroke-linecap="round" opacity="0.4"/>
  <!-- ES letterform -->
  <text x="28" y="102" font-family="Inter, system-ui, sans-serif" font-size="32" font-weight="700" fill="#ffffff" letter-spacing="-1">ES</text>
</svg>
