html, body {
    font-family: 'Poppins', sans-serif;
}

body{
    max-width: 2400px;
    margin: 0 auto;
}

.max-width {
    max-width: 1280px;
    margin: 0 auto;
}
.flex-v {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}
.row {
    margin: 0 !important;
}
/***** NAVIGATION ******/
nav {
    background-color:  #f1c40f;
}
.navbar-brand {
    font-family: 'Nunito', sans-serif;
    font-size: 48px;
    padding: 0 !important;
    color:  #1f618d   !important;
}
.nav-link {
    font-size: 22px;
    margin: 0 10px;
    color:  #1f618d   !important;
}
.nav-link.active {
    font-weight: bold;
}
.nav-item {
    display: flex;
    justify-content: center;
    align-items: center;
}

/***** HOME PAGE ******/
.main-hero {
    width: 100%;
    /* min-height: 600px; */
}
.hero-img-wrap {
    border-radius: 50%;
    width: 70px;
    height: 70px;
    display: flex;
    justify-content: center;
    align-items:flex-start;
    overflow: hidden;    
}
.hero-img-wrap img {
    width: 70px;
    height: auto;
}

.hero-sub-text {
    font-size: 19px;
}

.carousel-item img {
    width: 100%;
    /* height: 700px;
    object-fit: cover;
    object-position: bottom; */
}

@media screen and (max-width: 500px){
    .navbar-brand {
        font-size: 32px;
    }   
}

@media screen and (min-width: 501px) and (max-width: 650px){
    .navbar-brand {
        font-size: 40px;
    }   
}

/***** SECTION AUTHORs Book ******/
.books-heading {
    display: block;
    font-size: 42px;
    text-align: center;
    margin: 36px 10px 20px 10px;
}

.book-title {
    font-size: 34px;
    padding-bottom: 10px;
}

.book-img {
    max-height: 600px;
    width: auto;
}

.preface {
    line-height: 1.3em;
    font-size: 19px;
    padding-top: 0px !important;
    padding-bottom: 0px !important;
    color: #444;
    text-align: center;
}

@media screen and (max-width: 760px){
    .preface {
        line-height: 1.3em;
        font-size: 19px;       
    }
}


footer {
    height: 100px;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #f5f5f5;
}