*{
  box-sizing: border-box;
}
body{
  background-color: #f2f7f5;
}
header{
  display: flex;
  justify-content: space-between;
  border-bottom: 2px solid black;
  align-items: center; 
  height: 4.5rem;
  padding-left: 1rem;
  padding-right: 1rem;
  margin-bottom: 1rem;
  background-color: #72757e;
}
ul{
  display: flex;
  list-style-type: none;
}
.barra{
  border-right: 1px solid black;
  padding-right: 1rem;
  margin-right: 1rem;
}
a{
  text-decoration: none;
  color: #000000;
}

h4{
  padding-left: 2rem;
}
.aside-img{
  display: flex;
  height: 3rem;
  padding-left: 1rem;
}

footer{
  display: flex;
  border-top: 2px solid black;
  height: 4.5rem;
  justify-content: center;
  align-items: center;
  background-color: #72757e;
  position: absolute;
  bottom: 0;
  margin-bottom: 0.5rem;
  width: 98.70%;
}