* { margin: 0; padding: 0; box-sizing: border-box; }
html, body {
  font-family: -apple-system, BlinkMacSystemFont, 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', Meiryo, sans-serif;
  background: #1a1a2e;
  color: #e0e0e0;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-tap-highlight-color: transparent;
  -webkit-text-size-adjust: 100%;
}
h1 {
  text-align: center;
  font-size: 1.5em;
  color: #e94560;
  margin: 10px 0 16px;
  text-shadow: 0 0 20px rgba(233,69,96,0.5);
  letter-spacing: 2px;
}