html, body { margin: 0; padding: 0; height: 100%; overflow: hidden; background: #000; font-family: system-ui, sans-serif; }
canvas { display: block; }
#estado {
    position: fixed; inset: 0; display: flex; align-items: center; justify-content: center;
    color: #fff; font-size: 16px; pointer-events: none; text-align: center; padding: 16px;
}
#ayuda {
    position: fixed; left: 12px; bottom: 12px; color: #ddd; font-size: 12px; line-height: 1.5;
    background: rgba(0,0,0,.55); padding: 8px 12px; border-radius: 6px;
}