.header {
  text-align: center;
}

.flowers_header {
  background-image: linear-gradient(to bottom right, #FDA14E, #F5E67F);
}

.header_intro {
  height: 14rem;
  padding-top: 1.5rem;
  background-image: url('../img/pictures/backgrounds/background_flowers_left_bottom.png'), url('../img/pictures/backgrounds/background_flowers_right.png');
  background-position: left, right;
  background-repeat: no-repeat;
  background-size: contain;
  overflow: hidden;
}

#mobile_icon {
  display: none;
}

#header_logo {
  display: inline-block;
  height: 8rem;
  padding-right: 5rem;
}

#header_slogan {
  display: inline-block;
  width: 32rem;
  margin-left: 9.5rem;
  font-weight: bold;
  font-size: 1.5rem;
  color: black;
}

.header_menu {
  display: grid;
  grid-template-columns: 1fr 10rem 13rem 15rem 13rem 19rem 1fr;
  height: 5rem;
  background-image: linear-gradient(to bottom left, #F5E67F, #FFF089);
}

.header_menu a {
  font-size: 2rem;
  color: black;
  line-height: 5rem;
  border: 2px solid rgba(255, 0, 0, 0);
  padding-left: 0.5rem;
  padding-right: 0.5rem;
  border-radius: 25px;
  cursor: pointer;
  -webkit-transition: border 0.5s; /* Safari */
  transition: border 0.5s;
  text-decoration: none;
}

.header_menu a:hover {
  color: #FDA14E;
  border: 2px solid #FDA14E;
}

@media only screen and (max-width:850px) and (min-width:600px) {

  .header_menu {
    display: grid;
    grid-template-columns: 1fr repeat(9, 5rem) 1fr;
    grid-template-rows: 1fr 1fr;
    height: 10rem;
  }

  #home_header {
    grid-row: 1;
    grid-column: 3;
  }

  #items_header {
    grid-row: 1;
    grid-column: 5;
  }

  #prices_header {
    grid-row: 1;
    grid-column: 8;
  }

  #contact_header {
    grid-row: 2;
    grid-column: 3;
    padding-left: 3.5rem;
  }

  #book_header {
    grid-row: 2;
    grid-column-start: 6;
    grid-column-end: 10;
    text-align: right;
    padding-right: 2.5rem;
  }

}


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

  #mobile_icon {
    display: block;
    height: 5rem;
    padding-top: 0.5rem;
  }

  #mobile_icon_img {
    height: 4rem;
    width: auto;
  }

  .header_intro {
    height: 5rem;
    padding-top: 0.5rem;
    background-image: url('../img/pictures/backgrounds/background_flowers_left_bottom.png'), url('../img/pictures/backgrounds/background_flowers_right.png');
    background-position: left, right;
    background-repeat: no-repeat;
    background-size: contain;
    overflow: hidden;
  }

  #header_logo {
    display: inline-block;
    height: 4rem;
    padding: 0;
  }

  #header_slogan {
    display: none;
    width: 32rem;
    margin-left: 9.5rem;
    font-weight: bold;
    font-size: 1.5rem;
    color: black;
  }

  .header_menu {
    display: block;
    height: auto;
    background-image: linear-gradient(to bottom left, #F5E67F, #FFF089);
    text-align: center;
  }

  .header_menu a {
    color: black;
    line-height: 5rem;
    border: none;
    padding-left: 0.5rem;
    padding-right: 0.5rem;
    border-radius: 25px;
    cursor: pointer;
    -webkit-transition: none; /* Safari */
    transition: none;
    text-decoration: none;
  }

  .header_menu a:hover {
    color: #FDA14E;
    border: none;
  }

  .mobile_item {
    display: none;
  }
}