mego viewer: dial the main cam a bit smaller for a more balanced grid

egoSample/mego.html

@@ -39,10 +39,10 @@ header h1{margin:0 0 3px;font-size:19px}
 .panel{background:#0e1118;border:1px solid #1c2028;border-radius:8px}
 
 .vgrid{display:flex;justify-content:center;align-items:stretch;gap:8px;padding:8px}
-.vcol{display:flex;flex-direction:column;justify-content:space-between;gap:8px;flex:1 1 170px;min-width:0;max-width:360px}
+.vcol{display:flex;flex-direction:column;justify-content:space-between;gap:8px;flex:1 1 190px;min-width:0;max-width:340px}
 .vcol .vp{flex:0 0 auto;aspect-ratio:4/3}
 .vp{position:relative;background:#000;border-radius:4px;overflow:hidden;min-width:0}
-.vp.main{flex:3 1 440px;aspect-ratio:4/3;max-height:74vh;max-width:calc(100% - 16px)}
+.vp.main{flex:2.1 1 400px;aspect-ratio:4/3;max-height:62vh;max-width:calc(100% - 16px)}
 .vp video{width:100%;height:100%;object-fit:contain;display:block}
 /* master video for the centre tile: kept rendered (so Chrome keeps decoding) but
    transparent under the compositing canvas — do NOT use display:none / hidden */