/* These selectors are opt-in; the two headline games keep their existing art. */
body[data-game-background]{background:linear-gradient(#11110fee,#11110fee),var(--game-art) center top/cover no-repeat!important}
body[data-game-background="brick-tac"] .board{background:linear-gradient(#09131a33,#09131a33),var(--game-art) center/cover;padding:clamp(12px,5vw,26px);gap:7px;border-color:#8a8971}
body[data-game-background="brick-tac"] .square{background:#182b38a8;color:#d5e1df;border-color:#a4b6b780;text-shadow:0 2px 3px #071016}
body[data-game-background="brick-tac"] .square:enabled:hover{background:#304954d9}
body[data-game-background="brick-tac"] .square.win{background:#3f493bea;border-color:#ffe099}
body[data-game-background="chimney-builder"] .model{background:linear-gradient(#10263044,#10263066),var(--game-art) center/cover}
body[data-game-background="chimney-builder"] #diagram{background:linear-gradient(90deg,#10263011,#102630c9 25%,#102630c9 75%,#10263011)}
body[data-game-background="chimney-builder"] .model-label,body[data-game-background="chimney-builder"] #caption{background:#102630ed}