html,body{overscroll-behavior:none;color:#fff;-webkit-text-size-adjust:100%;background:#1f6aa5;height:100%;margin:0;font-family:system-ui,-apple-system,Hiragino Sans,Noto Sans JP,sans-serif;overflow:hidden}#app{position:fixed;inset:0}#app canvas{touch-action:none;width:100%;height:100%;display:block}.notice{text-align:center;white-space:pre-line;line-height:1.7;position:absolute;inset:auto 16px 50%;transform:translateY(50%)}.debug-hud{top:calc(env(safe-area-inset-top) + 8px);left:calc(env(safe-area-inset-left) + 8px);white-space:pre;pointer-events:none;background:#00000073;border-radius:6px;padding:4px 8px;font:12px/1.5 ui-monospace,Menlo,Consolas,monospace;position:absolute}