/* Only the decorative span is clipped; menu dropdowns keep their normal overflow. */
#main-nav.trsm-active > div { z-index: 1; }
#main-nav > .trsm-layer {
    display: block;
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
    user-select: none;
    z-index: 0;
    background: radial-gradient(ellipse 38px 65px at 0 0, #8c4cba14, transparent),
                radial-gradient(ellipse 150px 95px at 100% 100%, #ff9c2929, transparent);
}
#main-nav .trsm-art { position: absolute; display: block; border: 0; margin: 0; padding: 0; max-width: none; pointer-events: none; }
#main-nav .trsm-web-left, #main-nav .trsm-web-right { width: 65px; height: 65px; top: 0; opacity: .68; }
#main-nav .trsm-web-left {
    left: 0;
    width: 42px;
    height: 58px;
    opacity: .5;
    /* Fade before the white logo image, avoiding a visible rectangular join. */
    -webkit-mask-image: radial-gradient(ellipse at top left, #000 20%, transparent 74%);
    mask-image: radial-gradient(ellipse at top left, #000 20%, transparent 74%);
}
#main-nav .trsm-web-right { right: 0; transform: scaleX(-1); }
#main-nav .trsm-pumpkin { width: 48px; height: 48px; right: 8px; bottom: 1px; }
#main-nav .trsm-bat-one { width: 30px; height: 18px; left: 25%; bottom: 3px; transform: rotate(-12deg); }
#main-nav .trsm-bat-two { width: 26px; height: 16px; left: 69%; bottom: 5px; transform: rotate(9deg); }
#main-nav .trsm-bat-three { width: 20px; height: 13px; right: 74px; bottom: 3px; transform: rotate(-9deg); }
#main-nav .trsm-animate .trsm-bat-one { animation: trsm-fly-one 4s ease-in-out 1; }
#main-nav .trsm-animate .trsm-bat-two { animation: trsm-fly-two 4.5s ease-in-out 1; }
#main-nav .trsm-animate .trsm-bat-three { animation: trsm-fly-one 3.5s ease-in-out 1; }
@keyframes trsm-fly-one { 0%, 100% { translate: 0 0; } 35% { translate: 20px -12px; } 70% { translate: 40px -3px; } }
@keyframes trsm-fly-two { 0%, 100% { translate: 0 0; } 40% { translate: -25px -10px; } 75% { translate: -40px -2px; } }
@media (max-width: 979px) {
    /* Stay in the top 60px even when the mobile menu expands. */
    #main-nav > .trsm-layer { bottom: auto; height: 60px; }
    #main-nav .trsm-web-left, #main-nav .trsm-web-right { width: 28px; height: 28px; opacity: .45; }
    #main-nav .trsm-pumpkin { width: 25px; height: 25px; right: 1px; bottom: 0; }
    #main-nav .trsm-bat-one { left: 65%; width: 18px; height: 12px; bottom: 1px; }
    #main-nav .trsm-bat-two, #main-nav .trsm-bat-three { display: none; }
    #main-nav .trsm-animate .trsm-art { animation: none; }
}
@media (prefers-reduced-motion: reduce) { #main-nav .trsm-animate .trsm-art { animation: none; } }
@media print { #main-nav > .trsm-layer { display: none; } }