* {
  scrollbar-width: thin;
  scrollbar-color: #535353 #121212;
}

*::-webkit-scrollbar {
  width: 8px;
}

*::-webkit-scrollbar-track {
  background: #121212;
}

*::-webkit-scrollbar-thumb {
  background: #535353;
  border-radius: 4px;
}

html, body, #root {
  margin: 0;
  padding: 0;
  background-color: #121212;
  color: #ffffff;
  font-family: 'Roboto', 'Hiragino Sans', 'Yu Gothic', 'Noto Sans JP', sans-serif;
  height: 100%;
  overflow: hidden;
}

.material-icons {
  font-family: 'Material Icons';
  font-weight: normal;
  font-style: normal;
  font-size: 24px;
  display: inline-block;
  line-height: 1;
  text-transform: none;
  letter-spacing: normal;
  word-wrap: normal;
  white-space: nowrap;
  direction: ltr;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}