style.css

:root {
  font-family: Inter, Avenir, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 24px;
  font-weight: 400;

  color-scheme: light dark;
  color: #eee;
  background-color: #0e0e0e;

  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  display: flex;
  place-items: center;
}

#app {
  width: 100%;
  height: 100vh;
  overflow: auto;
  margin: 0;
  padding: 0;
  text-align: center;
}

canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  outline: none;
}

.sec {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

h1 {
  font-size: 6vw;
}

h2 {
  font-size: 4vw;
}