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    <text x="20" y="470" font-family="'IBM Plex Mono', monospace" font-size="11" fill="#94a3b8" letter-spacing="2">FIG_03 · SIGNAL PROPAGATION · REV 3.2</text>
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    {{-- Concentric rings centered --}}
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    {{-- Callouts --}}
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    <text x="220" y="76" font-family="'IBM Plex Mono', monospace" font-size="12" fill="#f97316" font-weight="500">ORIGIN</text>
    <text x="220" y="92" font-family="'IBM Plex Mono', monospace" font-size="10" fill="#94a3b8">t = 0</text>

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    <text x="595" y="196" font-family="'IBM Plex Mono', monospace" font-size="12" fill="#f97316" font-weight="500">REACH</text>
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    <text x="485" y="402" font-family="'IBM Plex Mono', monospace" font-size="11" fill="#94a3b8" text-anchor="middle">r = 170</text>
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