:root {
  color-scheme: light;
  font-family: Arial, Helvetica, sans-serif;
  --bg-color: #fff;
  --text-color: #000;
  --button-bg: #fff;
  --button-border: #222;
  --modal-bg: #fff;
}

body.dark-theme {
  color-scheme: dark;
  --bg-color: #121212;
  --text-color: #eee;
  --button-bg: #333;
  --button-border: #555;
  --modal-bg: #222;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg-color);
  color: var(--text-color);
}

#game-canvas {
  display: block;
  width: 100vw;
  height: 100vh;
  touch-action: none;
  background: var(--bg-color);
}

#ui-root {
  position: fixed;
  top: 12px;
  left: 12px;
  right: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 10;
  pointer-events: none;
}

#ui-root > * {
  pointer-events: auto;
}

#timer {
  margin-left: auto;
}

.ui-button,
.pill,
.modal button {
  border: 1px solid var(--button-border);
  border-radius: 10px;
  padding: 8px 10px;
  background: var(--button-bg);
  color: var(--text-color);
  font-size: 16px;
}

.small-text {
  font-size: 14px;
}

.pill {
  font-variant-numeric: tabular-nums;
}

.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 20;
  padding: 24px;
}

.modal.visible {
  display: flex;
}

.modal-content {
  position: relative;
  background: var(--modal-bg);
  border-radius: 12px;
  padding: 20px;
  width: min(90vw, 420px);
  text-align: center;
}

.close-button {
  position: absolute;
  top: 10px;
  right: 10px;
  color: var(--text-color);
}

.button-grid {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 12px;
}

.button-grid.single {
  grid-template-columns: 1fr;
}

h1,
h2,
p {
  margin: 10px 0;
  color: var(--text-color);
}