html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
}
.browser, .body {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
}
.body {
  display: flex;
  flex-direction: column;
  min-height: 95vh; /* ocupa toda la altura */
}

a span:hover {
  text-decoration: underline;
  color: #aa0000; /* tono rojo corporativo */
}