/* space-lander hd: the HD canvas sits over the classic arena canvas inside .game-viewport and under
   the HUD, controls and result sheet (those keep their own z-index). Taps still reach the
   classic canvas and buttons. Off with ?hd=0. */
.game-viewport .hd-layer { position: absolute; left: 0; top: 0; z-index: 1; pointer-events: none; display: block; }
#screen-title .hd-about { max-width: 640px; margin: 18px auto 0; text-align: left; color: #cbd5e1; font-size: 14px; line-height: 1.55; }
#screen-title .hd-about h2 { font-size: 16px; margin: 0 0 6px; color: #f8fafc; }
#screen-title .hd-about p { margin: 0 0 8px; }