<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 120 120">
<defs>
<!-- Watermelon rind gradient (green outer) -->
<linearGradient id="rind-gradient" x1="0%" y1="0%" x2="100%" y2="100%">
<stop offset="0%" style="stop-color:#689B8A"/>
<stop offset="100%" style="stop-color:#4A7D6D"/>
</linearGradient>
<!-- Watermelon flesh gradient (pink/coral inner) -->
<linearGradient id="flesh-gradient" x1="0%" y1="0%" x2="100%" y2="100%">
<stop offset="0%" style="stop-color:#FF6B7A"/>
<stop offset="100%" style="stop-color:#E85566"/>
</linearGradient>
</defs>
<!-- Outer circle - watermelon rind (green) -->
<circle cx="60" cy="60" r="56" fill="url(#rind-gradient)"/>
<!-- Inner circle - watermelon flesh (pink/coral) -->
<circle cx="60" cy="60" r="46" fill="url(#flesh-gradient)"/>
<!-- White rind edge -->
<circle cx="60" cy="60" r="48" fill="none" stroke="#F2EDD1" stroke-width="3" opacity="0.6"/>
<!-- Stylized "D" with flowing curves -->
<path d="M45 32
L45 88
M45 32
C73 32, 87 44, 87 60
C87 76, 73 88, 45 88"
fill="none"
stroke="#F2EDD1"
stroke-width="6"
stroke-linecap="round"
stroke-linejoin="round"/>
<!-- Seeds (representing model tiers) -->
<ellipse cx="64" cy="45" rx="3" ry="5" fill="#2D2D2D" transform="rotate(-20 64 45)"/>
<ellipse cx="72" cy="60" rx="3" ry="5" fill="#2D2D2D" transform="rotate(10 72 60)"/>
<ellipse cx="64" cy="75" rx="3" ry="5" fill="#2D2D2D" transform="rotate(25 64 75)"/>
</svg>