* {
  box-sizing: border-box;
  margin: 0;
}
html {
  font: normal 16px sans-serif;
  font-size: clamp(14px, 4vmin, 20px);
}
body {
  margin: 0;
}
nav {
  display: flex;
  gap: 0.5rem;
}
.app {
  margin: 0 auto;
  max-width: 800px;
  padding: 2rem;
  display: grid;
  gap: 1em;
}