conway-react/src/index.css

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
    sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

code {
  font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
    monospace;
}

.container {
  align-items: center;
  display: flex;
  height: 100vh;
  flex-direction: column;
  width: 100vw;
}

.controls {
  background: black;
  color: white;
  display: flex;
  padding: 1em;
  width: 100%;
}

.board-container {
  align-items: center;
  display: flex;
  flex: 1;
  justify-content: center;
  width: 100%;
}

.row {
  height: 30px;
}

.cell {
  border: 1px solid #999;
  border-right: none;
  border-bottom: none;
  display: inline-block;
  height: 30px;
  width: 30px;
}

.row:last-child .cell {
  border-bottom: 1px solid #999;
}

.cell:last-child {
  border-right: 1px solid #999;
}

.cell.alive {
  background: black;
}

.cell.clickable {
  cursor: pointer;
}

.button {
  background: black;
  border: 1px solid white;
  color: white;
  cursor: pointer;
  font-size: 16px;
  margin-right: 1em;
  padding: 0.25em 0.5em;
}

.button:not([disabled]):hover {
  background: white;
  color: black;
}

.controls__section {
  align-items: center;
  display: flex;
  flex: 1;
  justify-content: center;
  margin: 0.5em 0;
}

.size,
.speed {
  align-items: center;
  display: flex;
  justify-content: center;
}

.button[disabled] {
  cursor: not-allowed;
  opacity: 0.6;
}

.controls .play {
  text-align: right;
}

.play .button {
  background: #347b20;
}

.play .button:hover {
  background: #4c9c36;
  color: white;
}

.reset .button {
  background: #7b2020;
}

.reset .button:hover {
  background: #9c3636;
  color: white;
}

.number-field {
  font-size: 16px;
  display: inline-block;
  margin-left: 0.25em;
  text-align: center;
  width: 50px;
}

.dimensions label {
  margin-right: 1em;
}

.play-reset {
  justify-content: flex-end;
}

.counter {
  padding: 1em;
}