.live-board.connect-four-board {
  width: min(100%, 420px);
  aspect-ratio: 7 / 6;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 6px;
  padding: 10px;
  border: 1px solid #42658e;
  border-radius: 9px;
  background: #426f9f;
  box-shadow: 0 8px 18px rgb(17 35 52 / 18%);
}
.connect-four-cell.board-cell {
  width: 100%;
  min-width: 0;
  min-height: 0;
  aspect-ratio: 1;
  align-self: center;
  border: 0;
  border-radius: 50%;
  background: #f3f1e9;
  box-shadow: inset 0 2px 5px rgb(22 37 49 / 20%);
  color: transparent;
}
.connect-four-cell.red.board-cell { background: #e87860; }
.connect-four-cell.yellow.board-cell { background: #d7f477; }
.connect-four-cell.board-cell:hover:enabled { transform: translateY(-2px); border: 0; background: #fffefa; }
.connect-four-cell.red.board-cell:hover:enabled { background: #f08b75; }
.connect-four-cell.yellow.board-cell:hover:enabled { background: #e3ff8d; }
.connect-four-cell.board-cell.winning { outline: 3px solid #fffefa; outline-offset: -5px; }

body[data-theme="dark"] .live-board.connect-four-board {
  border-color: #577aa4;
  background: #29466a;
  box-shadow: 0 10px 26px rgb(0 0 0 / 34%);
}
body[data-theme="dark"] .connect-four-cell.board-cell { background: #151d19; }
body[data-theme="dark"] .connect-four-cell.red.board-cell { background: #f08b75; }
body[data-theme="dark"] .connect-four-cell.yellow.board-cell { background: #d7f477; }
body[data-theme="dark"] .connect-four-cell.board-cell.winning { outline-color: #f5f7f2; }

@media (max-width: 760px) {
  .live-board.connect-four-board { gap: 4px; padding: 7px; }
}