.duel-menu{width:min(620px,100%);text-align:center}.duel-menu small{color:var(--lime);font:600 9px "Chakra Petch";letter-spacing:2px}.duel-menu h3{font:700 27px "Chakra Petch";margin:8px 0 20px}.duel-modes{display:grid;grid-template-columns:repeat(2,1fr);gap:9px}.duel-modes button{background:#151a26;border:1px solid var(--line);color:var(--text);padding:16px;text-align:left}.duel-modes button:hover{border-color:var(--lime)}.duel-modes b{display:block;color:var(--lime);font:700 12px "Chakra Petch";margin-bottom:5px}.duel-modes span{color:var(--muted);font-size:9px}.duel-game{width:min(430px,100%);text-align:center}.duel-series{display:flex;justify-content:center;gap:20px;margin-bottom:10px;color:var(--muted);font:600 9px "Chakra Petch"}.duel-series b{color:var(--lime)}.duel-board{display:grid;gap:7px;margin:auto}.duel-board.size-3{grid-template-columns:repeat(3,1fr);width:min(360px,90%)}.duel-board.size-4{grid-template-columns:repeat(4,1fr);width:min(400px,95%)}.duel-cell{aspect-ratio:1;background:#151a26;border:1px solid #353c4d;color:var(--lime);font:600 55px "Chakra Petch";transition:.15s}.size-4 .duel-cell{font-size:42px}.duel-cell.o{color:var(--violet)}.duel-cell.win{background:rgba(201,255,54,.12);border-color:var(--lime);box-shadow:0 0 16px rgba(201,255,54,.16)}.duel-cell:not(:disabled):hover{background:#202637}.round-message{min-height:22px;color:var(--muted);font:600 10px "Chakra Petch";margin-top:12px}@media(max-width:600px){.duel-modes{grid-template-columns:1fr}.duel-modes button{padding:12px}.duel-menu h3{font-size:21px}.duel-cell{font-size:43px}}