/* V19: add physical stroke width before softening, retaining V18's low opacity.
   Only the two decorative SVGs are filtered; no full-screen blur or extra glow. */
.seabed-edge{stroke-width:1.8;filter:blur(1.15px)}
.contour-coral{stroke-width:1.8}
.contour-fine{stroke-width:1.25;opacity:.4}
.contour-ground{stroke-width:1.6;filter:blur(.65px)}
@media(max-width:800px){.seabed-edge{filter:blur(.9px)}}