.app {
  width: min(480px, 100%);
}

.score-bar {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.score-block {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 14px;
  text-align: center;
  display: grid;
  gap: 2px;
}

.score-label {
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.score-value {
  font-size: 26px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}

.canvas-wrap {
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border);
}

#gameCanvas {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  background: #0a0e1a;
  cursor: crosshair;
}

.controls-row {
  display: flex;
  gap: 8px;
}

.controls-row .btn {
  flex: 1;
  font-size: 13px;
  padding: 10px 12px;
}

.controls-row .btn.secondary {
  color: var(--muted);
}

.tip {
  margin: 0;
  text-align: center;
  font-size: 12px;
  color: var(--muted);
}

.game-over {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(6px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.25s ease;
}

.game-over-content {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 36px 40px;
  border-radius: 16px;
  text-align: center;
  min-width: 280px;
  max-width: 90%;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5);
  position: relative;
}

.go-close {
  appearance: none;
  position: absolute;
  top: 10px;
  right: 10px;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
}

.go-close:hover {
  background: var(--surface);
  color: var(--text);
  border-color: var(--accent);
}

.game-over-content h2 {
  margin: 0 0 12px;
  font-size: 28px;
  color: var(--danger);
}

.go-score {
  font-size: 18px;
  color: var(--text);
  margin: 0 0 4px;
}

#finalScore {
  font-weight: 700;
  color: var(--accent);
  font-size: 22px;
}

.go-hs {
  font-size: 14px;
  color: var(--accent);
  margin: 0 0 24px;
  min-height: 1.3em;
}

.hidden {
  display: none !important;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}