.cabecalho {
  position: absolute;
  top: -2.5em;
  left: 50%;
  transform: translate(-50%);
  text-align: center;
  width: 100%;
  border-bottom: 1px solid #103d4a;
  padding-bottom: .5em
}

.cabecalho-logo {
  margin-bottom: .2em;
}

.cabecalho-logo-img {
  margin: 0 auto;
  display: block;
  transition: filter .3s;
}

.cabecalho-logo-img:hover,
.cabecalho-logo-img:focus {
  filter: brightness(1.2);
}


.cabecalho-nav {
  text-align: center;
}

.cabecalho-nav-item {
  display: inline-block;
  line-height: 2;
  margin: 0 .5em;
  font-size: .95em;
}

.cabecalho-nav-item a {
  text-decoration: none;
  color: #fff;
  font-family: 'Open Sans', serif;

}

.cabecalho-nav-item a:hover,
.cabecalho-nav-item a:focus {
  text-decoration: underline;
}

@media (min-width: 830px) {

  .cabecalho {
    border-bottom: 0;
    padding-bottom: 0
  }

  .cabecalho-logo {
    float: left;
  }

  .cabecalho-nav {
    float: right;
    margin-top: 1em;
  }

}