:root{--bg: #121418;--panel: #1a1d23;--line: #2b3039;--text: #e8eaee;--muted: #9aa2ae;--accent: #f08a24;--accent-ink: #1a1206;--blue: #3a6cff;color-scheme:dark}*{box-sizing:border-box}html,body{margin:0;height:100%}body{height:100dvh}body{background:var(--bg);color:var(--text);font:14px/1.45 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;display:flex;flex-direction:column;overflow:hidden;-webkit-tap-highlight-color:transparent}button{font:inherit;color:var(--text);background:#262a32;border:1px solid var(--line);border-radius:8px;padding:6px 12px;cursor:pointer;white-space:nowrap}button:hover{background:#2f343e}button.active{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}button.ghost{background:transparent}button:disabled{opacity:.4;cursor:default}button:disabled:hover{background:#262a32}.bar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:8px 16px;padding-top:max(8px,env(safe-area-inset-top));border-bottom:1px solid var(--line);background:var(--panel);flex:none}.brand{display:flex;align-items:baseline;gap:10px;min-width:0}.brand b{font-size:18px;letter-spacing:.02em}.brand .sub{color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.tools{display:flex;align-items:center;gap:6px;overflow-x:auto;scrollbar-width:none}.seg{display:flex}.seg button{border-radius:0;margin-left:-1px}.seg button:first-child{border-radius:8px 0 0 8px;margin-left:0}.seg button:last-child{border-radius:0 8px 8px 0}.stage{flex:1;display:flex;min-height:0}.arena{position:relative;flex:1 1 62%;min-width:0;min-height:0;overflow:hidden}.remote{position:relative;flex:0 0 38%;max-width:560px;min-height:0;overflow:hidden;border-left:1px solid var(--line);background:radial-gradient(120% 90% at 50% 35%,#2a2f38,#15171b 70%);display:flex;flex-direction:column;touch-action:none}#arena-canvas,#remote-canvas{display:block;width:100%;height:100%}#remote-canvas{flex:1;min-height:0;touch-action:none;-webkit-user-select:none;user-select:none}.arena:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none;background:radial-gradient(120% 95% at 50% 45%,transparent 55%,rgba(6,8,12,.45) 100%)}.labels{position:absolute;top:0;right:0;bottom:0;left:0;z-index:0}.hud,.toast,.loading,.part-card{z-index:1}.legend{list-style:none;margin:0;padding:8px 12px calc(10px + env(safe-area-inset-bottom));display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px;font-size:12px}.legend button{width:100%;min-height:30px;text-align:left;background:transparent;border-radius:6px;padding:4px 8px;color:var(--muted);font-size:inherit;overflow:hidden;text-overflow:ellipsis}.legend button b{color:var(--text);margin-right:4px}.legend button.on{border-color:#5a4630;color:#f3c58f}.hud{position:absolute;left:12px;top:12px;display:flex;gap:8px;pointer-events:none}.hud span[hidden]{display:none}.hud span.ok{border-color:#2e6b45;color:#8fe0ae}.hud span.warn{border-color:#7a3b2a;color:#ffb199}.hud span{background:#0a0c0fb3;border:1px solid var(--line);border-radius:6px;padding:3px 8px;font-variant-numeric:tabular-nums}.toast{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);background:#101216eb;border:1px solid var(--line);border-radius:12px;padding:18px 22px;text-align:center;max-width:calc(100% - 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