style.css

body {
  font-family: 'Droid Serif', serif;
  font-size: 3em;
  background-image: url('https://img.freepik.com/premium-photo/kraft-paper-texture_250469-1830.jpg');
  background-size: contain;
}

body::-webkit-scrollbar {
  display: none;
}

h1 {
  text-align: center;
  position: relative;
}

li,a {
  text-decoration: none;
  color: black;
  list-style: none;
}

#cabecalho {
  font-family: 'Playfair Display', serif;
  border-bottom: 2px solid #2f2f2f;
  padding: 10px;
  text-decoration: none;
  text-align: center;
  font-size: 30px;
  text-transform: uppercase;
}

#nav{
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 16px;
  border-bottom: 2px solid #2f2f2f;
}
#ant{
  margin-left:  2px;
  font-weight: bolder;
}
#prox{
  margin-right:  2px;
  font-weight: bolder;
}

#navOp li{
  display: inline-block;
  padding: 0 20px;
  
}

#esquerda {
  grid-column-start: 1;
  grid-column-end: 1;
}

#container {
  font-size: 0;
  line-height: 0;
  word-spacing: -.31em;
  display: inline-block;
  margin: 30px 2% 0 2%;

}
.collum {
  display: grid;
  margin: auto;
  font-size: 20px;
  line-height: 40px;
  margin-bottom: 50px;
  border-right: none;
  border-bottom: 1px solid #2f2f2f;
  transition: all .7s;
  width: 70%;
}

.collum:last-child {
  border-bottom: none;
}

.collum h1 {
  line-height: 1em;
  font-style: italic;
  font-size: 36px;
  box-sizing: border-box;
  padding: 10px 0 10px 0;
  font-weight: bold;
}

img{
  width: 30em;
  height: 17em;
}

#rodape{
  border-top: 2px solid #2f2f2f;
  font-size: 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}

@media screen and (max-width:600px) {

  .collum {
    display: grid;
    margin: auto;
    font-size: 20px;
    line-height: 40px;
    margin-bottom: 50px;
    border-right: none;
    border-bottom: 1px solid #2f2f2f;
    transition: all .7s;
    width: 70%;
  }

  img{
    width: 20em;
    height: 10em;
  }
}