GPT-5.4 Nano

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    <!-- Mouth gradients -->
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    <!-- Clip for face -->
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    <!-- Hair clip to shape hair over forehead -->
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  <!-- Portrait group with shadow -->
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    <!-- Face base -->
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    <!-- Face shading & highlights -->
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      <!-- forehead highlight -->
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      <!-- under-eye tone -->
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      <!-- side burn/contour -->
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      <!-- subtle wrinkles around eyes & smile -->
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      <!-- jaw contour -->
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    <!-- Hair (back) -->
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      <!-- top hair bulk -->
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      <!-- side darker masses -->
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      <!-- hairline wisps -->
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    <!-- Forehead hair cap edge -->
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    <!-- Eyebrows -->
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    <!-- Eyes -->
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      <!-- Right iris -->
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      <!-- Eyelids (arched) -->
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      <!-- Under-eye lines -->
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    <!-- Nose -->
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    <!-- Mouth -->
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      <!-- Teeth -->
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      <!-- Corners and lines -->
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      <!-- Smile crease -->
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    <!-- Cheeks and nasolabial folds -->
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    <!-- Ears (stylized) -->
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    <!-- Wrinkled expressive forehead lines -->
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      <path d="M 530 370 C 575 362 625 372 670 395" fill="none" stroke="#3b1410" stroke-opacity="0.35" stroke-width="5" stroke-linecap="round"/>
    </g>

    <!-- Eye area brow ridge and skin texture -->
    <g clip-path="url(#faceClip)" opacity="0.18">
      <path d="M 355 450 C 405 410 455 400 495 410" fill="none" stroke="#000" stroke-opacity="0.35" stroke-width="8" stroke-linecap="round"/>
      <path d="M 665 450 C 615 410 565 400 525 410" fill="none" stroke="#000" stroke-opacity="0.35" stroke-width="8" stroke-linecap="round"/>
    </g>

    <!-- Final overlay: subtle grain -->
    <g filter="url(#grain)" opacity="0.95">
      <path d="M 512 128
               C 642 128 732 230 744 338
               C 754 432 765 520 735 602
               C 706 680 646 742 582 778
               C 552 795 524 804 512 804
               C 500 804 472 795 442 778
               C 378 742 318 680 289 602
               C 259 520 270 432 280 338
               C 292 230 382 128 512 128 Z"
            fill="url(#spot)" opacity="0.12"/>
    </g>
  </g>

  <!-- Foreground stylized hair wisps & flyaways -->
  <g opacity="0.95">
    <path d="M 340 265
             C 355 220 385 185 430 160
             C 400 170 370 195 350 230
             C 325 273 318 315 320 350
             C 330 315 332 292 340 265 Z"
          fill="#110a09" opacity="0.6" filter="url(#blur3)"/>
    <path d="M 690 160
             C 735 185 765 220 780 265
             C 788 292 790 315 800 350
             C 802 315 795 273 770 230
             C 750 195 720 170 690 160 Z"
          fill="#110a09" opacity="0.55" filter="url(#blur3)"/>

    <!-- tiny highlights -->
    <path d="M 410 205
             C 430 195 460 188 485 190"
          fill="none" stroke="#d8a27b" stroke-opacity="0.25" stroke-width="6" stroke-linecap="round"/>
    <path d="M 535 190
             C 560 188 590 195 610 205"
          fill="none" stroke="#d8a27b" stroke-opacity="0.22" stroke-width="6" stroke-linecap="round"/>
  </g>
</svg>