/* Reset básico CSS */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  height: 100%;
  font-family: sans-serif;
}

ul, ol {
  list-style: none;
  z-index: 1;
}

a {
  text-decoration: none;
  color: #fff;
  z-index: 1;
}

 button {
  background: none;
  border: none;
  cursor: pointer;
 }