:root {
  --ball-size: 30px;
  --ball-margin: 2px;
}

.button {
  background-color: #f4511e;
  border: none;
  color: white;
  padding: 5px 15px;
  text-align: center;
  font-size: 16px;
  margin: 4px 2px;
  opacity: 0.6;
  transition: 0.3s;
  display: inline-block;
  text-decoration: none;
  cursor: pointer;
}

.button:hover {opacity: 1}

body {
  background-color: rgb(79 67 39);
  color: white;
  font-family: 'Courier New', Courier, monospace;
}

h1 {
  border-radius: 10px 10px 0px 0px;
  border: 2px solid #cf812c;
  border-bottom: 0;

  display: block;
  width: fit-content;
  margin: auto;
  padding: 5px;
}

#scoreboard {
  display: grid;
  grid-gap: 10px;
  grid-auto-columns: minmax(0, 1fr);
  width: fit-content;
  margin: auto;
}

#scoreboard div {
  text-align: center;
  grid-row: 1;
  border-radius: 0px 0px 10px 10px;
  border: 2px solid #cf812c;
  border-top: 0;
  padding: 5px;
}

#scoreboard span {
  display: block;
}

#gameboard {
  border-radius: 10px;
  border: 2px solid #cf812c;
  border-spacing: 0;
  margin: auto;
}

#gameboard td{
  padding: 0;
}

.cell {
  display: flex;
}

.ball {
  display: block;
  width: var(--ball-size);
  height: var(--ball-size);
  margin: var(--ball-margin);
  border-radius: 50%;
}

.on {
  width: calc((var(--ball-size) + 2 * var(--ball-margin)) * 0.6);
  height: calc((var(--ball-size) + 2 * var(--ball-margin))* 0.6);
  margin: calc((var(--ball-size) + 2 * var(--ball-margin)) * 0.2);
}

.blue {
  background: radial-gradient(circle at 33% 27%, white 0px, rgb(0 99 255) 17%, rgb(1 0 67) 75%, rgb(0 99 255) 100%);
}
.yellow {
  background: radial-gradient(circle at 33% 27%, white 2px, rgb(255 238 0) 27%, rgb(90, 90, 0) 75%, rgb(255 238 0) 100%);
}
.red {
  background: radial-gradient(circle at 33% 27%, white 0px, rgb(255 70 94) 17%, rgb(90, 0, 0) 75%, rgb(255 70 94) 100%);
}