.arena-bg{pointer-events:none;position:absolute;inset:0;overflow:hidden}.arena-ring{border:3px solid;border-radius:50%;position:absolute;left:50%;transform:translate(-50%);box-shadow:0 0 18px #60a5fa2e}.arena-crowd{opacity:.8;background-image:radial-gradient(#ffffff8c 1.2px,#0000 1.6px);background-size:13px 9px;height:36%;animation:3.2s steps(2,end) infinite arena-flicker;position:absolute;top:0;left:-20%;right:-20%;-webkit-mask-image:radial-gradient(at 50% -36%,#0000 54%,#000 62% 90%,#0000 98%);mask-image:radial-gradient(at 50% -36%,#0000 54%,#000 62% 90%,#0000 98%)}@keyframes arena-flicker{0%,to{opacity:.65;background-position:0 0}50%{opacity:.9;background-position:4px 2px}}.arena-flash{opacity:0;background:#fff;border-radius:50%;width:7px;height:7px;animation:4.2s ease-out infinite arena-photoflash;position:absolute;box-shadow:0 0 16px 5px #fffc}@keyframes arena-photoflash{0%,88%{opacity:0}90%{opacity:1}96%,to{opacity:0}}.arena-beam{filter:blur(9px);transform-origin:top;background:linear-gradient(#fde68a9e,#fde68a1f 72%,#0000);width:170px;height:84%;position:absolute;top:-14%}.arena-beam-l{animation:10s ease-in-out infinite alternate arena-sway-l;left:8%}.arena-beam-r{animation:12s ease-in-out infinite alternate arena-sway-r;right:8%}@keyframes arena-sway-l{0%{transform:rotate(20deg)}to{transform:rotate(31deg)}}@keyframes arena-sway-r{0%{transform:rotate(-31deg)}to{transform:rotate(-20deg)}}.arena-pitch{background:radial-gradient(at 50% 100%,#22c55e9e,#22c55e1f 58%,#0000 80%);height:44%;position:absolute;bottom:-12%;left:-20%;right:-20%}.arena-center-circle{border:3px solid #86efac6b;border-radius:50%;position:absolute;left:50%;transform:translate(-50%);box-shadow:0 0 26px #22c55e59,inset 0 0 26px #22c55e40}.arena-sweep{background:linear-gradient(100deg,#0000,#ffffff21,#0000);width:60%;height:120%;animation:7s ease-in-out infinite arena-sweep;position:absolute;top:-10%;left:-40%;transform:skew(-14deg)}@keyframes arena-sweep{0%,55%{left:-60%}75%{left:110%}to{left:110%}}.arena-particle{opacity:0;border-radius:50%;animation:linear infinite arena-rise;position:absolute;bottom:-12px}@keyframes arena-rise{0%{opacity:0;transform:translate(0)}8%{opacity:var(--o)}88%{opacity:var(--o)}to{transform:translate(var(--sway), calc(-100vh - 24px));opacity:0}}.arena-vignette{background:radial-gradient(at 50% 40%,#0000 62%,#02061761 100%);position:absolute;inset:0}@media (prefers-reduced-motion:reduce){.arena-crowd,.arena-flash,.arena-beam,.arena-sweep,.arena-particle{animation:none}.arena-flash,.arena-sweep{display:none}.arena-particle{opacity:var(--o)}}