.live-preview{display:block;width:100%;border:0;min-height:260px;background:#101a29}.live-preview[hidden]{display:none!important}:root{color-scheme:dark;--bg:#141817;--line:#343a33;--ink:#f1f0e7;--muted:#9da59a;--lime:#d2ef96}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:14px ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}.shell{max-width:1000px;margin:0 auto;padding:24px}.arcade-nav{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}.arcade-nav a{padding:10px 16px;border:1px solid var(--line);border-radius:7px;text-decoration:none;color:var(--muted);font-size:13px}.arcade-nav a[aria-current],.arcade-nav a:hover{background:var(--lime);color:var(--bg);border-color:var(--lime)}button,textarea{font:inherit}button{border:1px solid var(--line);background:#242b26;color:var(--ink);padding:9px 14px;border-radius:6px;cursor:pointer;min-height:40px;touch-action:manipulation}button:hover{border-color:var(--lime)}button:disabled{opacity:.4;cursor:not-allowed}a:focus-visible,button:focus-visible,canvas:focus-visible,textarea:focus-visible,summary:focus-visible{outline:2px solid var(--lime);outline-offset:3px}.play-panel{border:1px solid var(--line);border-radius:10px;overflow:hidden}.game-top{display:flex;align-items:center;justify-content:space-between;padding:10px 16px;background:#1b201e}.game-top>span{color:var(--muted);font-size:12px}.game-top strong{color:var(--ink);font:600 23px ui-monospace,monospace;margin-left:10px}.arcade-stage{position:relative;background:#101a29}#game{display:block;width:100%;height:auto;aspect-ratio:900/440;touch-action:none}.stage-overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:16px;background:#101a2977}.stage-overlay[hidden]{display:none}.stage-overlay h1{font-size:clamp(22px,3vw,32px);font-weight:500;margin:0;letter-spacing:-.6px}#start,#apply{background:var(--lime);border-color:var(--lime);color:var(--bg);font-weight:650}#status{margin:0;padding:10px 16px;color:var(--muted);font-size:12px}.prompt-panel{margin-top:18px}#prompt-form{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:9px;align-items:stretch}label{grid-column:1/-1;font-size:12px;color:var(--muted)}textarea{resize:vertical;min-height:65px;max-height:200px;width:100%;padding:12px;border:1px solid var(--line);background:#1b201e;color:var(--ink);border-radius:7px}textarea::placeholder{color:#8e978d}#apply{padding:12px 22px}.prompt-bottom{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:10px}#mode{font-size:11px;color:var(--muted)}.rule-actions{display:flex;gap:8px}.rule-actions button{font-size:12px;background:transparent;padding:7px 10px}#feedback{font-size:12px;line-height:1.5;margin-top:8px;color:var(--muted);overflow-wrap:anywhere}#feedback:empty{display:none}#diff{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}#diff[hidden]{display:none}.change-row{display:flex;gap:10px;padding:8px 10px;background:#20291f;border-radius:5px;font-size:12px}.change-row span{color:var(--muted)}.change-row strong{font-weight:500;color:var(--lime);overflow-wrap:anywhere}details{margin-top:12px;color:var(--muted);font-size:11px}summary{cursor:pointer;width:max-content}pre{padding:14px;border:1px solid var(--line);border-radius:7px;color:var(--muted);overflow:auto;font:12px/1.6 ui-monospace,monospace}@media(max-width:600px){.shell{padding:14px 12px}.arcade-nav{gap:6px;margin-bottom:12px}.arcade-nav a{padding:10px 12px;font-size:12px}.game-top{padding:7px 12px}#prompt-form{grid-template-columns:1fr}#apply{justify-self:end;padding:10px 20px}#status{font-size:11px;padding:9px 12px}.prompt-panel{margin-top:14px}.stage-overlay{gap:12px}.stage-overlay h1{font-size:23px}.prompt-bottom{margin-top:5px}}