img {
    max-width:100%;
    height:auto;
    max-height:100%;
}

html, body {
  height: 100%;
  background: #F4FAFF;

}

.navbar_background {
    background: #1818e0;
}

.navbar-text {
    font-size: 18px;
    color: white;
    font-family: Garamond;
}

#home {
    padding: 10px; 
    margin-top:180px
}

#cape_peninsula_nudibranchs,
#maputaland_nudibranchs,
#cape_peninsula_fishes,
#marine_guide {
    padding: 10px; 
    margin-top:180px
}

#contact_us {
    padding: 10px; 
}


.book_cover {
  cursor: pointer;
}

.main-text {
    font-size: 16px;
    color: black;
    font-family: Helvetica;
}

.main-text-heading {
    font-size: 18px;
    color: black;
    font-family: Helvetica;
}

.book_title {
    font-size: 20px;
    color: black;
    font-family: Helvetica;
    text-align: center;
}

.book_author {
    font-size: 18px;
    color: black;
    font-family: Helvetica;
    text-align: center;
}

.book_description {
    font-size: 16px;
    color: black;
    font-family: Helvetica;
    text-align: justify;
}

.book_image {
    text-align: center;
}