:root{color-scheme:dark}html,body{margin:0;padding:0;height:100%;background:#000;overflow:hidden;font-family:monospace;touch-action:manipulation;-webkit-user-select:none;user-select:none}#app{width:100%;height:100%;display:grid;place-items:center}#screen{image-rendering:pixelated;image-rendering:crisp-edges;width:min(100vw,calc(100vh * 256 / 212));height:auto;aspect-ratio:256 / 212;background:#000}#touch{position:fixed;top:0;right:0;bottom:0;left:0;pointer-events:none;display:none}@media(pointer:coarse),(hover:none){#touch{display:block}}#dpad{position:absolute;bottom:max(16px,env(safe-area-inset-bottom));left:16px;display:grid;grid-template-columns:repeat(3,56px);grid-template-rows:repeat(3,56px);gap:4px;pointer-events:auto}#btn-up{grid-column:2;grid-row:1}#btn-left{grid-column:1;grid-row:2}#btn-right{grid-column:3;grid-row:2}#btn-down{grid-column:2;grid-row:3}#actions{position:absolute;bottom:max(16px,env(safe-area-inset-bottom));right:16px;display:flex;flex-direction:column;gap:8px;pointer-events:auto}#touch button{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:1px solid rgba(255,255,255,.5);background:#ffffff1a;color:#fff;font-family:inherit;font-size:20px;border-radius:8px;width:56px;height:56px;-webkit-tap-highlight-color:transparent}#actions button{font-size:13px}#touch button:active{background:#ffffff59}body.help-visible #touch{display:none}#help-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000d9;display:none;z-index:100;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Helvetica Neue,Hiragino Sans,Meiryo,sans-serif;color:#eee;overflow:auto;padding:16px;box-sizing:border-box;-webkit-user-select:text;user-select:text}#help-overlay.show{display:flex;align-items:flex-start;justify-content:center}.help-panel{background:#18181b;border:1px solid #3a3a45;border-radius:10px;padding:24px 28px;max-width:540px;width:100%;margin:20px 0;line-height:1.6}.help-panel h1{margin:0 0 12px;font-size:22px;letter-spacing:.04em}.help-panel h2{margin:18px 0 6px;font-size:15px;color:#9cd6ff;letter-spacing:.05em;text-transform:uppercase}.help-panel p{margin:4px 0;font-size:14px}.help-panel ul{margin:6px 0 0;padding-left:20px;font-size:14px}.help-panel ul li{margin:4px 0}.help-panel table{margin:6px 0;border-collapse:collapse;font-size:13px}.help-panel td{padding:4px 8px;vertical-align:top}.help-panel td:first-child{white-space:nowrap}.help-panel kbd{display:inline-block;padding:1px 6px;margin:0 1px;background:#2a2a35;border:1px solid #555;border-radius:4px;font-family:ui-monospace,SF Mono,Menlo,monospace;font-size:12px}.help-panel .hint{margin-top:14px;color:#888;font-size:12px}.help-close{-webkit-appearance:none;-moz-appearance:none;appearance:none;margin-top:18px;padding:8px 24px;background:#2a4a7a;color:#fff;border:1px solid #4a7ab0;border-radius:6px;font-family:inherit;font-size:14px;cursor:pointer}.help-close:hover{background:#355a8c}.help-close:active{background:#244170}