style.css

:root {
  font-family: Inter, system-ui, Avenir, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  font-weight: 400;
  box-sizing: border-box;
  color-scheme: light dark;
  color: rgba(255, 255, 255, 0.87);
  background-color: #242424;

  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-text-size-adjust: 100%;

  --space-ship-height: 30px;
  --space-ship-width: 30;
  --horizontal-arrow-color: red;
  --vertical-arrow-color: lime;
  --vertical-axis-color: #ccc;
  --horizontal-axis-color: #ccc;
  --space-ship-color: deepskyblue;
  --space-ship-second-color: yellow;
}
.field-editor-panel {
  width: 600px;
  position: absolute;
  right: 0;
  bottom: 0;
  z-index: 1;
}
.hidden {
  display: none;
}

.field-editor {
  height: 300px;
  width: 100%;
}

a {
  font-weight: 500;
  color: #646cff;
  text-decoration: inherit;
}
a:hover {
  color: #535bf2;
}

body {
  margin: 0;
  padding: 0;
  display: grid;
  place-items: center;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

h1 {
  font-size: 3.2em;
  line-height: 1.1;
}

@media (prefers-color-scheme: light) {
  :root {
    color: #213547;
    background-color: #ffffff;
  }
  a:hover {
    color: #747bff;
  }
  button {
    background-color: #f9f9f9;
  }
}

.open-editor {
  position: absolute;
  right: 8px;
  bottom: 8px;
}
.field-errors {
  color: orangered;
  background: #333;
  font-size: 12px;
}
.field-editor-panel .controls {
  background: #111;
}

/* when screen is too small, adjust the editor */
@media (max-width: 600px) {
  .field-editor-panel {
    width: 100%;
  }
  .field-editor {
    width: 100%;
  }
}