* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  background: #04030a;
  color: #e8f6ff;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  overflow: hidden;
  -webkit-user-select: none;
  user-select: none;
  touch-action: none;
}

#sr-stage {
  position: relative;
  width: 100vw;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(ellipse at 50% 30%, #0c1030 0%, #04030a 70%);
}

#game-canvas {
  display: block;
  background: #04030a;
  box-shadow: 0 0 40px rgba(34, 211, 238, 0.15);
}

#app {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

/* ---- HUD ---- */
.sr-hud {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  pointer-events: none;
}

.sr-hud-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.sr-stat {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.sr-stat-right {
  text-align: right;
}

.sr-stat-label {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: #6ea3c9;
}

.sr-stat-value {
  font-size: 18px;
  font-weight: 700;
  color: #a7f0ff;
  text-shadow: 0 0 8px rgba(34, 211, 238, 0.6);
}

.sr-lives {
  font-size: 16px;
  color: #ff5470;
  text-shadow: 0 0 6px rgba(255, 84, 112, 0.6);
}

.sr-wave .sr-stat-value {
  color: #ffd23f;
  text-shadow: 0 0 8px rgba(255, 210, 63, 0.6);
}

/* ---- 파워업 게이지 ---- */
.sr-powerups {
  display: flex;
  gap: 6px;
  margin-top: 4px;
}

.sr-pu-badge {
  --pu-color: #22d3ee;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 2px 6px;
  border-radius: 6px;
  border: 1px solid var(--pu-color);
  background: rgba(4, 3, 10, 0.55);
  box-shadow: 0 0 8px color-mix(in srgb, var(--pu-color) 55%, transparent);
}

.sr-pu-label {
  font-size: 10px;
  font-weight: 800;
  color: var(--pu-color);
  text-shadow: 0 0 6px var(--pu-color);
}

.sr-pu-gauge {
  display: block;
  width: 28px;
  height: 4px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.15);
  overflow: hidden;
}

.sr-pu-gauge-fill {
  display: block;
  height: 100%;
  background: var(--pu-color);
}

/* ---- Overlays ---- */
.sr-menu-layer {
  position: absolute;
  inset: 0;
}

.sr-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  pointer-events: auto;
  background: rgba(4, 3, 10, 0.55);
  backdrop-filter: blur(2px);
}

.sr-overlay[hidden] {
  display: none;
}

.sr-logo {
  font-size: 34px;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: #a7f0ff;
  text-shadow: 0 0 18px rgba(34, 211, 238, 0.8);
}

.sr-logo span {
  display: block;
  color: #ff5470;
  text-shadow: 0 0 18px rgba(255, 84, 112, 0.8);
}

.sr-best-line {
  font-size: 13px;
  color: #6ea3c9;
}

.sr-controls-hint {
  font-size: 11px;
  color: #4c6f8c;
  text-align: center;
  max-width: 260px;
}

.sr-btn {
  appearance: none;
  border: 1px solid rgba(167, 240, 255, 0.4);
  background: rgba(12, 16, 40, 0.8);
  color: #cfe8ff;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 10px 28px;
  border-radius: 8px;
  cursor: pointer;
}

.sr-btn-primary {
  border-color: #22d3ee;
  color: #04030a;
  background: #22d3ee;
  box-shadow: 0 0 16px rgba(34, 211, 238, 0.6);
}

.sr-glass-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 24px 28px;
  border-radius: 14px;
  background: rgba(10, 14, 34, 0.85);
  border: 1px solid rgba(167, 240, 255, 0.2);
}

.sr-glass-card h2 {
  margin: 0;
  font-size: 22px;
  letter-spacing: 0.08em;
  color: #a7f0ff;
}

.sr-newbest {
  font-size: 12px;
  color: #ffd23f;
  letter-spacing: 0.08em;
}

.sr-newbest[hidden] {
  display: none;
}

.sr-final-score {
  font-size: 30px;
  font-weight: 800;
  color: #a7f0ff;
  text-shadow: 0 0 12px rgba(34, 211, 238, 0.6);
}

.sr-final-sub {
  font-size: 12px;
  color: #6ea3c9;
}