* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-size: 16px;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
  list-style: none;
  text-decoration: none;
}

/* textos e fontes */

h1 {
  font-size: 2rem;
  font-weight: 700;
  color: #333;
}

h2 {
  font-size: 1.5rem;
  font-weight: 600;
  color: #333;
}

h3 {
  font-size: 1.25rem;
  font-weight: 500;
  color: #333;
}

h4 {
  font-size: 1rem;
  font-weight: 400;
  color: #333;
}

h5 {
  font-size: 0.875rem;
  font-weight: 300;
  color: #333;
}

h6 {
  font-size: 0.75rem;
  font-weight: 200;
  color: #333;
}

p {
  font-size: 1rem;
  font-weight: 400;
  color: #333;
}

a {
  text-decoration: none;
  color: #333;
}

/* layout */

body {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  height: 100vh;
  background-color: #f0f0f0;
  flex-direction: column;
  gap: 2rem;
  padding: 4rem;
}

ul {
  display: flex;
  flex-direction: column;
  align-items: start;
}

li {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
}

li a {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: 0.25rem;
  background-color: #333;
  color: #f0f0f0;
}

li a:hover {
  background-color: #555;
}