:root {
  color-scheme: light;
  --ink: #101416;
  --accent: #3bd66f;
  --panel: rgba(10, 12, 14, 0.72);
  --panel-border: rgba(255, 255, 255, 0.12);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  background: #0b0f13;
  font-family: "Trebuchet MS", "Segoe UI", system-ui, sans-serif;
  overflow: hidden;
}

#game {
  width: 100vw;
  height: 100vh;
  display: block;
}

#hud {
  position: absolute;
  top: 16px;
  left: 16px;
  padding: 12px 16px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  color: #e8f1f5;
  backdrop-filter: blur(6px);
  z-index: 10;
  max-width: 360px;
}

#title {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}

#help {
  font-size: 13px;
  opacity: 0.8;
  margin-bottom: 10px;
}

#score {
  font-size: 16px;
  color: var(--accent);
  font-weight: 600;
}