:root {
  --gb-lightest: #9bbc0f;
  --gb-light: #8bac0f;
  --gb-dark: #306230;
  --gb-darkest: #0f380f;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--gb-darkest);
  font-family: 'Courier New', monospace;
  color: var(--gb-darkest);
  padding: 12px;
  touch-action: none;
  overscroll-behavior: none;
  overflow: hidden;
}

.screen {
  background: var(--gb-lightest);
  border: 6px solid var(--gb-dark);
  border-radius: 8px;
  padding: 12px;
  width: 100%;
  max-width: 360px;
}

.game-title {
  margin: 0 0 10px;
  font-size: 14px;
  text-align: center;
  color: var(--gb-darkest);
}

.top-controls {
  display: flex;
  justify-content: flex-start;
  gap: 6px;
  margin-bottom: 10px;
}

.corner-btn {
  padding: 4px 10px;
  border: 2px solid var(--gb-dark);
  background: var(--gb-light);
  color: var(--gb-darkest);
  font-family: inherit;
  font-size: 10px;
  border-radius: 4px;
}

.board-area {
  display: flex;
  gap: 12px;
}

#board {
  width: 55%;
  height: auto;
  aspect-ratio: 10 / 18;
  image-rendering: pixelated;
  background: var(--gb-lightest);
  border: 2px solid var(--gb-dark);
  touch-action: none;
}

.side-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.panel-box {
  border: 2px solid var(--gb-dark);
  padding: 4px 6px;
  text-align: center;
}

.label {
  font-size: 10px;
  letter-spacing: 1px;
}

#next {
  width: 100%;
  height: auto;
  aspect-ratio: 1;
  image-rendering: pixelated;
}

#highscores {
  margin-top: 12px;
}

#highscore-list {
  margin: 4px 0 0;
  padding-left: 20px;
  font-size: 12px;
}

.overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 56, 15, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
}

.overlay.hidden {
  display: none;
}

.overlay-box {
  background: var(--gb-lightest);
  border: 4px solid var(--gb-dark);
  padding: 16px;
  text-align: center;
}

.overlay-box input {
  display: block;
  margin: 8px auto;
  width: 4ch;
  text-align: center;
  text-transform: uppercase;
  font-family: inherit;
  font-size: 16px;
}

.gesture-legend {
  display: none;
  flex-direction: column;
  gap: 4px;
  width: 100%;
  max-width: 360px;
  margin-top: 16px;
  font-size: 11px;
  text-align: center;
  color: var(--gb-lightest);
}

@media (pointer: coarse) {
  .gesture-legend { display: flex; }
}

.legend-icon {
  display: inline-block;
  width: 2.5em;
  font-weight: bold;
}

#start-btn {
  margin-top: 8px;
  padding: 8px 24px;
  border: 2px solid var(--gb-dark);
  background: var(--gb-light);
  color: var(--gb-darkest);
  font-family: inherit;
  font-size: 14px;
  border-radius: 4px;
}