html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

  background-image: url("https://images.unsplash.com/photo-1480497490787-505ec076689f?q=80&w=2070&auto=format&fit=crop");
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
}

* {
  box-sizing: border-box;
}

a {
  text-decoration: none;
  color: inherit;
}

button {
  cursor: pointer;
  transition: all 0.2s ease-in-out;
}

button:hover {
  opacity: 0.9;
}

h1, h2, h3, h4, h5 {
  letter-spacing: -0.02em;
}