/* fire diagonal: molten iron + flames + camera weight */
main.c4-heavy{animation:c4-heavy-move .34s cubic-bezier(.2,.85,.3,1)}
@keyframes c4-heavy-move{
  0%{transform:rotate(0) scale(1)}
  18%{transform:rotate(.55deg) scale(1.012) translateY(2px)}
  42%{transform:rotate(-.35deg) scale(1.008) translateY(-1px)}
  70%{transform:rotate(.12deg) scale(1.004)}
  100%{transform:rotate(0) scale(1)}
}
.c4-cleave .c4-molten{fill:none;stroke:#ffb257;stroke-width:7;stroke-linecap:round;
  filter:blur(2px) drop-shadow(0 0 12px #ff8a3c);mix-blend-mode:screen;opacity:0}
.c4-cleave .c4-flamebit{position:absolute;width:9px;height:16px;border-radius:50% 50% 50% 0;
  background:radial-gradient(circle at 45% 35%,#fff3d6,#ffb257 45%,rgba(255,90,20,0) 75%);
  box-shadow:0 0 12px #ff8a3c,0 0 24px rgba(255,120,40,.6);transform:translate(-50%,-50%) rotate(-45deg);
  pointer-events:none;opacity:0;will-change:transform,opacity}
/* ice: freeze overlay + glass burst */
.c4-cleave .c4-freeze{position:absolute;inset:0;pointer-events:none;opacity:0;
  background:
   radial-gradient(circle at 50% 62%,rgba(255,255,255,.85),rgba(200,240,255,.45) 30%,rgba(160,220,245,0) 62%),
   linear-gradient(180deg,rgba(220,245,255,.35),rgba(240,252,255,.15) 50%,rgba(200,235,250,.3));
  mix-blend-mode:screen}
.c4-cleave .c4-freeze::after{content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(115deg,rgba(255,255,255,.22) 0 1px,transparent 1px 7px),
             repeating-linear-gradient(65deg,rgba(200,240,255,.18) 0 1px,transparent 1px 9px);
  filter:blur(1px)}
.c4-cleave .c4-iceburst{position:absolute;display:block;pointer-events:none;
  clip-path:polygon(50% 0%,64% 40%,100% 50%,64% 60%,50% 100%,36% 60%,0% 50%,36% 40%);
  background:linear-gradient(180deg,#ffffff,#dff4ff 55%,#9fdcf0);
  filter:drop-shadow(0 0 8px #bfeaff);opacity:0;will-change:transform,opacity}
@media (prefers-reduced-motion: reduce){
  main.c4-heavy{animation:none}
  .c4-cleave .c4-freeze{display:none}
}