:root{color-scheme:dark;font-family:system-ui,-apple-system,"Noto Sans TC",sans-serif;color:#eaf4e2;background:#101c32}*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 12% 0,#394663 0,transparent 45%),#101c32;min-height:100svh}a{color:#d9efc4}button,textarea{font:inherit}button{color:#f5f8e8;background:#2a4b5a;border:1px solid #93b3bd;border-radius:10px;min-height:44px;padding:9px 12px;cursor:pointer;font-size:13px}button:disabled{opacity:.5;cursor:default}button[aria-pressed=true]{background:#425e55;border-color:#e3f9b0;color:#f0ffc9;box-shadow:inset 0 0 0 1px #c6e991}:focus-visible{outline:3px solid #e4ffaa;outline-offset:3px}[hidden]{display:none!important}.skip{position:absolute;left:8px;top:-70px;padding:12px;background:#213f4d;z-index:10}.skip:focus{top:8px}header{max-width:1180px;margin:auto;padding:20px 16px;display:flex;gap:16px;align-items:center;justify-content:space-between;flex-wrap:wrap}header>a{font-weight:700;text-decoration:none}header nav{display:flex;gap:20px;flex-wrap:wrap}header a{display:inline-flex;align-items:center;min-height:44px;font-size:13px}main{max-width:1180px;margin:auto;padding:0 12px}.courtyard{border:1px solid #698b9b;border-radius:22px;overflow:hidden;background:#182d43;box-shadow:0 24px 80px #040b1c66}.heading{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:14px 18px}.heading h1{font-size:clamp(20px,3vw,29px);margin:6px 0;line-height:1.4}.heading p{margin:5px 0;font-size:13px;color:#c0d6d2}.eyebrow{font-size:10px!important;letter-spacing:.13em;color:#d5edb8!important}.arena{display:grid;grid-template-columns:minmax(0,1fr) 330px;align-items:start}#stage{position:relative;height:500px;min-width:0;background:radial-gradient(ellipse at 40% 10%,#354963,#111d34);overflow:hidden}#game{position:absolute;inset:0}#game canvas{display:block;touch-action:none}.dock{background:#193347;border-left:1px solid #698b9b;padding:10px;min-width:0}.dock p{font-size:12px;line-height:1.55;margin:7px 0}.dock .lead{font-weight:700;font-size:14px}.targets,.mirrors{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:5px}.targets button{font-size:11px;padding:7px 3px;line-height:1.5}.mirrors{margin:10px 0 4px}.move{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:5px}.move button{padding:7px 3px;font-size:12px}.rotation,.history{display:flex;gap:6px;margin-top:7px}.rotation button,.history button{flex:1}.history button{padding:7px 4px}.overlay{position:absolute;inset:0;z-index:2;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:18px;background:#11283ae8}.overlay h2{font-size:clamp(20px,3vw,30px);margin:8px 0}.overlay p{font-size:14px;line-height:1.7;margin:6px 0}.overlay button{margin:12px 0 4px;background:#e5f6ae;color:#16333d;font-weight:800;min-width:180px}.overlay a{min-height:44px;display:flex;align-items:center;font-size:13px}.paused{position:absolute;left:10px;right:10px;top:7px;text-align:center;margin:0;padding:7px;background:#17364ae8;border:1px solid #a6c3b2;border-radius:10px;font-size:12px;pointer-events:none}#feedback{color:#f4e6ad;min-height:36px}#dirty{color:#c7dad2;font-size:11px}#pose{background:#102c3e;border-left:3px solid #c3e79a;padding:7px}#power{font-size:11px;color:#c8ded6}.help,.adult,.play-share{margin:14px 0;padding:8px 14px;border:1px solid #698b9b;border-radius:14px;background:#183346}.courtyard>.help{margin:10px}.help summary,.adult summary,.play-share summary{min-height:44px;display:flex;align-items:center;font-size:13px;cursor:pointer}.help p,.help li,.adult p,.play-share p{font-size:13px;line-height:1.75;overflow-wrap:anywhere}.help ol{padding-left:22px}.help li+li{margin-top:6px}.share-actions{display:flex;gap:8px;flex-wrap:wrap}.play-share textarea{display:block;width:100%;margin:8px 0;padding:10px;min-width:0;background:#10263c;color:#edf7df;border:1px solid #9fbbb4;border-radius:8px;resize:vertical;overflow-wrap:anywhere}.play-share label{font-size:12px}.error{margin:12px;padding:12px;background:#512d39;font-size:13px;line-height:1.6}.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}[data-play-leave-status]{margin:10px;padding:10px;border:1px solid #c1dea8;border-radius:8px;font-size:13px;line-height:1.6}footer{max-width:1180px;margin:24px auto;padding:16px;font-size:12px;color:#a8c0bf}.adult{background:transparent}.adult a{min-height:44px;display:inline-flex;align-items:center}
@media(max-width:850px){.arena{display:block}#stage{height:clamp(230px,39svh,360px)}.dock{border-left:0;border-top:1px solid #698b9b}.heading{padding:10px 12px}.heading p:last-child{font-size:12px}.dock .lead{margin-top:0}.targets button{font-size:12px}.mirrors{margin-top:7px}.dock #feedback{min-height:0}.heading h1{font-size:21px}header{padding:8px 14px}.eyebrow{font-size:9px!important}}
@media(max-width:360px){main{padding:0 8px}.heading h1{font-size:18px}.heading{padding:8px}.heading .eyebrow{letter-spacing:.03em;font-size:8px!important}#stage{height:230px}.dock{padding:8px}.move button{font-size:11px}header nav{gap:12px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

/* v25: the world and its primary tools stay adjacent; advanced tools are optional. */
.viewbar{display:flex;gap:6px;align-items:center;flex-wrap:wrap;padding:6px 12px;background:#122a3d;border-block:1px solid #527181}.viewbar button{min-width:44px}.viewbar span{font-size:12px;color:#d6e7e1}.dock #selected-label{font-size:12px;margin:5px 0}.rotation button{font-size:16px;font-weight:700;min-height:48px;background:#39616a}.observation{border-left:3px solid #f0d293;background:#102b3c;padding:7px 9px;margin-top:9px}.observation p{font-size:13px;line-height:1.65;margin:0 0 5px}.observation button{width:100%;text-align:left;font-size:12px}.observation span{display:block;font-size:12px;color:#f7e4b6;margin-top:5px}.fine{margin-top:8px;border-top:1px solid #769295}.fine summary{min-height:44px;display:flex;align-items:center;cursor:pointer;font-size:13px}.fine summary:before{content:'＋';margin-right:8px}.fine[open] summary:before{content:'−'}.dock #feedback{min-height:0;font-size:12px;margin:6px 0}.dock .lead{font-size:13px}.viewbar [aria-pressed=true]{background:#725a32;color:#fff3cf;border-color:#f2db9a}#stage[data-mode=pan] canvas{cursor:grab}#stage[data-mode=pan][data-panning=true] canvas{cursor:grabbing}
@media(max-width:850px){#stage{height:clamp(220px,30svh,320px)}.heading{padding:8px 12px}.heading .eyebrow{display:none}.heading h1{margin:2px 0;font-size:20px}.heading p{font-size:12px}.viewbar{padding:5px 8px}.viewbar button{font-size:12px;padding:7px 8px}.viewbar span{width:100%;font-size:11px}.dock{padding:8px}.dock .lead{margin:0 0 5px}.mirrors{margin:6px 0 3px}.rotation{margin-top:4px}.observation{margin-top:6px}.targets button{font-size:11px;min-width:44px}.heading button{padding:8px 12px}.viewbar button:focus-visible{outline-offset:1px}}