.bd-placeholder-img {
    font-size: 1.125rem;
    text-anchor: middle;
    -webkit-user-select: none;
    -moz-user-select: none;
    user-select: none;
}

@media (min-width: 768px) {
    .bd-placeholder-img-lg {
        font-size: 3.5rem;
    }
}

.all-book-img {
    border: 1px solid #d4d4d4;
    padding: 4px !important;
    border-radius: 6px;
    margin-top: 20px;
}

.cart-book-img {
    border: 1px solid #d4d4d4;
    padding: 2px !important;
    border-radius: 6px;
}

.book-cover {
    border: 1px solid #d4d4d4;
    padding: 4px;
    border-radius: 6px;
    width: auto;
    height: auto;
    max-width: 75%;
    display: block;
    margin: 0 auto;
}
@media (max-width: 576px) {
  .book-cover {
    max-width: 50%;
    height: auto;
  }
}

.b-example-divider {
    height: 3rem;
    background-color: rgba(0, 0, 0, .1);
    border: solid rgba(0, 0, 0, .15);
    border-width: 1px 0;
    box-shadow: inset 0 .5em 1.5em rgba(0, 0, 0, .1), inset 0 .125em .5em rgba(0, 0, 0, .15);
}

.b-example-vr {
    flex-shrink: 0;
    width: 1.5rem;
    height: 100vh;
}

.bi {
    vertical-align: -.125em;
    fill: currentColor;
}

.nav-scroller {
    position: relative;
    z-index: 2;
    height: 2.75rem;
    overflow-y: hidden;
}

.nav-scroller .nav {
    display: flex;
    flex-wrap: nowrap;
    padding-bottom: 1rem;
    margin-top: -1px;
    overflow-x: auto;
    text-align: center;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
}

.item-title {
    font-size: 28px;
}

html, body {
    height: 100%;
}
body {
    display: flex;
    flex-direction: column;
}
main {
    flex: 1;
}

#product_title b {
    font-size: 14px;
}