html, body { margin: 0; height: 100%; background: #1e1e1e; overflow: hidden; }
#editor { display: block; width: 100vw; height: 100vh; touch-action: none; }
/* The focused text sink: keys, IME composition and paste all land here. It
   must stay focusable and on-screen for IMEs, but invisible. */
#ime { position: fixed; left: 0; bottom: 0; width: 1px; height: 1px; opacity: 0;
       border: 0; padding: 0; resize: none; overflow: hidden; }
#ended { position: fixed; inset: 0; display: grid; place-items: center;
         background: rgba(0,0,0,.6); color: #ddd; font: 15px system-ui, sans-serif; }
#ended[hidden] { display: none; }
.boot-error { position: fixed; inset: 16px; color: #f88; font: 13px monospace; white-space: pre-wrap; }