:root{--bg:#f6f6f4;--bar:#fff;--line:#e6e6e1;--ink:#1a1a1a;--accent:#ff5a3c;--accent2:#d8331a;--muted:#8a8a86}*{box-sizing:border-box}html,body{margin:0;height:100%}body{font-family:Hiragino Sans,Yu Gothic,Meiryo,system-ui,sans-serif;background:var(--bg);color:var(--ink);height:100vh;height:100dvh;overflow:hidden}.topbar{position:fixed;top:0;left:0;right:0;z-index:70;background:var(--bar)}.app-bar{background:var(--bar);border-bottom:1px solid var(--line);flex:none}.app-row{display:flex;align-items:center;justify-content:space-between;padding:8px 14px;gap:10px}.app-title{font-weight:800;font-size:14px;white-space:nowrap}.proto{font-size:10px;background:#fff3ef;color:var(--accent2);padding:1px 7px;border-radius:20px;margin-left:4px}.app-actions{display:flex;align-items:center;gap:8px}.savestate{font-size:11.5px;color:var(--muted);white-space:nowrap;max-width:200px;overflow:hidden;text-overflow:ellipsis}.savestate.ok{color:#2e7d32}.savestate.err{color:#c0392b}.act{border:1px solid 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