/* Fixed arena height prevents iframe resize feedback; all controls remain visible. */
html{scroll-behavior:auto}main{padding:0;max-width:none}.arena{height:640px;min-height:550px;border-radius:0}.console{border-radius:0}.results-section{padding:24px}.scene-tabs{flex-wrap:wrap}
@media(max-width:700px){.arena{height:520px;min-height:520px;max-height:none}.results-section{padding:18px 14px}.console{padding:15px}.options-panel{max-width:calc(100vw - 36px)}}