:root {
  --ui-bg: rgba(20, 22, 28, 0.6);
  --ui-fg: #e8f0ff;
  --accent: #6cf;
}

html,
body {
  height: 100%;
  margin: 0;
  background: #0c0f14;
  overflow: hidden;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto,
    Noto Sans KR, "Apple SD Gothic Neo", Arial, "Helvetica Neue", Helvetica,
    sans-serif;
  color: var(--ui-fg);
}

canvas {
  width: 100vw;
  height: 100vh;
  display: block;
  background: radial-gradient(1200px 800px at 50% 40%, #18202b, #0c0f14 60%);
}

.hud {
  position: fixed;
  inset: 0;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 16px;
}

.row {
  display: flex;
  gap: 12px;
  align-items: center;
}

.pill {
  background: var(--ui-bg);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 10px 12px;
  border-radius: 999px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

.bar {
  width: 240px;
  height: 14px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.bar > i {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, #3aff87, #1dcf5c);
}

.score {
  font-weight: 700;
  letter-spacing: 0.5px;
}

.help {
  opacity: 0.9;
  line-height: 1.35;
}

.help kbd {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 2px 6px;
  border-radius: 6px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
}

.centerMessage {
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  pointer-events: none;
}

.title {
  font-size: clamp(24px, 5vw, 42px);
  font-weight: 800;
  letter-spacing: 0.5px;
  text-shadow: 0 10px 40px rgba(0, 0, 0, 0.45);
  margin-bottom: 10px;
}

.subtitle {
  opacity: 0.9;
}

.btnRow {
  margin-top: 14px;
  display: flex;
  gap: 8px;
  justify-content: center;
}

.btn {
  pointer-events: auto;
  cursor: pointer;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.06);
  color: var(--ui-fg);
  font-weight: 600;
}

.btn:hover {
  background: rgba(255, 255, 255, 0.12);
}

.corner {
  position: fixed;
  right: 16px;
  bottom: 16px;
  opacity: 0.6;
  font-size: 12px;
}