body {
  margin: 0;
  padding: 0;
  font-family: sans-serif;
  text-align: center;
  background-color: #2ecc71;
}

h1 {
  color: white;
  margin-top: 10px;
}

.gate {
  background-color: #c0392b;
  color: white;
  padding: 10px;
  font-size: 20px;
  border-radius: 10px;
  margin: 10px auto;
  width: 200px;
}

#game-field {
  position: relative;
  width: 90%;
  max-width: 400px;
  height: 400px;
  margin: 0 auto;
  background: #ecf0f1;
  border: 3px solid white;
  border-radius: 15px;
  overflow: hidden;
}

#ball {
  position: absolute;
  width: 20px;
  height: 20px;
  background: black;
  border-radius: 50%;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.player {
  position: absolute;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  cursor: pointer;
}

.forward {
  background-color: yellow;
}

.defender {
  background-color: blue;
}

#card-deck {
  margin: 10px;
}