/* set variable for common color usage*/
:root {
    --black-bg:#2a2c2e;
    --black-high-emphasis:#000000;
    --yellow:#f4ce47;
    --yellow-banner-text:#F4BA30;
    --placeholder-white:whitesmoke;
}

* {
    margin:0;
    padding:0;
    box-sizing:border-box;
}

body {
    background-color: var(--placeholder-white);
}

/*---- */
li {
    list-style-type: none;
    
}

li a {
    color: var(--placeholder-white);
}

li i:hover {
    color: var(--yellow-banner-text) ;
}

/* header */
.header {
    background-color: var(--black-bg);
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    padding:0 25px ;
    margin: 25px;
    max-width: 1920px;
    border-radius: 20px;
}

img {
    margin: 14px;
}

.top-nav {
    display: flex;
    flex-direction: row;
    gap: 32px;
    margin: auto;
    font-size: 18px;
    line-height: 25px;
}

.top-nav li a {
    color: grey;
}

.top-nav li a:hover {
    color: var(--yellow-banner-text) ;
}

.side-nav {
    display: flex;
    flex-direction: row;
    gap: 40px;
}

.icon {
    display: flex;
    flex-direction: row;
    gap: 20px;
    margin:25px 30px;
    color: var(--placeholder-white);
}

.btn-login {
    margin: 10px 0px;
    width: 100px;
    border-radius: 16px;
    background-color: var(--yellow) ;
    line-height: 25px;
}

.btn-login:hover {
    color: var(--black-bg);
    background-color: var(--placeholder-white) ;
}

/* mediaquery-header*/

@media (max-width: 900px) {
    .header, .top-nav {
        flex-direction: column;
        align-items: center;
    }
    .top-nav {
        text-align: center;
    }
    .header {
        padding: 36px 0;
        margin-top: 0;
    }
}

/* banner */

.banner {
    background-color: var(--yellow);
    display: flex;
    margin: 30px auto;
    justify-content: center;
    gap: 25px;
    overflow: hidden;
    flex-direction: row;
    text-wrap: nowrap;
    padding: 15px;
}

.banner li {
    font-size: 35px;
    line-height: 60px;
    font-weight: 300;
    color: var(--yellow-banner-text);
}

li#middle {
    color: var(--black-high-emphasis);
}

.banner li:hover {
    color: var(--black-high-emphasis);
}

/* mediaquery-banner */
@media (max-width: 900px) {
    .banner {
        margin-top: 22px;
        margin-bottom: 16px;
    }
}

/* content */

.content {
    background-color: var(--black-bg);
    padding: 50px 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.row {
    display: flex;
    flex-direction: row;
    gap: 8px;
    justify-content: center;
}

/* mediaquery-row */
@media (max-width:900px) {
    .row {
        flex-direction: column;
        align-items: center;
    }
}

.card {
    background-color: var(--placeholder-white);
    height: 577px;
    width:294px;
    border-radius: 20px;
    padding:24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.book-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
    flex-shrink: 0;
    gap: 4px;
    height: 75px;
}

.author {
    font-size: 14px;
}

.title {
    font-size: 18px;
    line-height: 24px; /* 150% */
}

.book-info-1 {
    display: flex;
    flex-direction: row;
    gap: 8px;
    margin: auto 0;
    padding: 10px 0px;
}

.book-info-1 li {
    display: flex;
    flex-direction: row;
    gap: 4px;
    padding: 8px 12px;
    border: 1px solid black;
    border-radius: 30px;
}

.comment:hover, .rating:hover, .comment i:hover {
    background-color: var(--yellow);
    color: var(--placeholder-white;)
}

.price {
    display: flex;
    flex-direction: row;
    gap: 10px;
    color: black;
    font-size: 18px;
}

.slashed-price {
    color: grey;
    text-decoration: line-through;
}

/* footer */

.footer{
    display: flex;
    flex-direction: column;
    border: 1px solid black;
    background-color: var(--black-bg);
    color: var(--placeholder-white);
    max-width: 1250px;
    margin: 0 auto;
    margin-top: 20px;
}

.top-position, .bottom-position,
.social-icon, .misc, .contact-detail {
    display: flex;
    flex-direction: row;
    gap: 20px;
}

.top-position, .bottom-position {
    justify-content: space-between;
}

.top-position {
    padding: 20px 24px;
    align-items: center;
}

.bottom-position {
    background-color: var(--black-high-emphasis);
    padding: 12px 24px;
}

/* mediaquery-footer */
@media (max-width: 900px) {
    .bottom-position{
        flex-direction: column;
        align-items:center;
        justify-content: center;
        gap: auto;
        margin: 0px 5px;
    } 
}