body {
  font-family: 'Inter', sans-serif;
  overscroll-behavior: none;
}

html, body, #root {
  height: 100%;
  margin: 0;
  background-color: #111827;
  color: #f3f4f6;
}

.tetris-board-bg {
  background-color: #1f2937;
}

.cell-border {
  border: 1px solid #374151;
}

.preview-grid-bg {
  background-color: #1f2937;
}

/* Mobile optimization */
@media (max-width: 768px) {
  .mobile-fullscreen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 50;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #111827;
  }

  * { touch-action: manipulation; }
}

.foot {
  padding: 8px 0;
  text-align: center;
  font-size: 14px;
  color: #9ca3af;
  background: #1f2937;
}