:root {
    --serif: 'Noto Serif SC', serif;
    --sans: 'Noto Sans SC', sans-serif;
    --brush: 'Ma Shan Zheng', cursive;
  }
  * { -webkit-tap-highlight-color: transparent; }
  html, body { margin: 0; padding: 0; height: 100%; }
  body {
    background:
      radial-gradient(circle at 50% 30%, #2a2420, #15110d 80%);
    display: flex; align-items: center; justify-content: center;
    min-height: 100vh; font-family: var(--sans);
    padding: 24px 0;
  }
  select option { font-family: var(--sans); }
  @keyframes tj-spin { to { transform: rotate(360deg); } }
  @keyframes tj-pulse { 0%,100% { transform: scale(1); opacity: 1; } 50% { transform: scale(1.12); opacity: 0.7; } }
  /* hide scrollbars inside device */
  .tj-screen::-webkit-scrollbar { width: 0; }