quarto.css

html {
  box-sizing: border-box;
  background-color: black;
  color: white;
  font-family: "Tahoma", "Arial", sans-serif;
}

header {
   font-family: "Times New Roman", serif;
}

header, footer {
  display: flex;
  flex-flow: column nowrap;
  align-items: center;
}

a:active {
  color: inherit;
}
a:visited {
  color: inherit;
}

.game, .bannerspot {
  margin: 0 auto;
  width: 90%;
  display: flex;
  flex-flow: row wrap;
  justify-content: center;
  align-items: stretch;
}

.banner {
  width: 100%;
  background-color: lightgreen;
  margin-bottom: 1em;
  padding: 0.75em;
  text-align: center;
  font-weight: bold;
  color: black;
}

.gameboard {
  box-sizing: content-box;
  width: 280px;
  height: 280px;
  background-color: white;
  margin-right: 25px;
  padding: 1em;
  border: 4px solid orchid;
  border-radius: 1em;
  display: flex;
  flex-flow: row wrap;
}

.piece {
  width: 40px;
  margin: 2px 2px 2px 2px;
}

.boardspot {
  width: 25%;
  height: 25%;
  box-sizing: border-box;
  border: 2px solid black;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}

.gamepieces {
  display: flex;
  flex-flow: column;
  justify-content: space-between;
}

#activespot {
  background-color: white;
  width: 100%;
  height: 100%;
  box-sizing: border-box;
  border: 2px solid black;
  border-radius: 0.5em;
  display: flex;
  justify-content: center;
  align-items: flex-end;
}

.active {
  box-sizing: content-box;
  background-color: white;
  width: 75px;
  height: 75px;
  padding: 0.5em;
  border: 4px solid orchid;
  border-radius: 1em;
}

.inactive {
  box-sizing: border-box;
  background-color: white;
  width: 300px;
  padding: 10px;
  display: flex;
  flex-flow: row wrap;
  justify-content: space-around;
  align-items: baseline;
}


@media only screen and (max-width: 768px) {
  .game {
    margin: 0 auto;
    width: 90%;
    display: flex;
    flex-flow: column wrap;
    align-items: center;
  }
  .gameboard {
    margin-right: 0;
    margin-bottom: 25px;
  }
  .gamepieces {
    flex-flow: row;
  }
  .active {
    margin-right: 20px;
  }
  .inactive {
    width: 200px;
  }

}