```css
body{

    margin:0;

    background:#f4f1e8;

    font-family:'Source Sans 3', sans-serif;

    color:#222;
}

/* PAGE */

.book-page{

    max-width:1200px;

    margin:auto;

    padding:80px 20px;
}

/* BACK LINK */

.back-link{

    display:inline-block;

    margin-bottom:40px;

    color:#b79d63;

    text-decoration:none;

    font-weight:700;

    transition:0.3s;
}

.back-link:hover{

    transform:translateX(-5px);
}

/* LAYOUT */

.book-layout{

    display:grid;

    grid-template-columns:
    380px 1fr;

    gap:70px;

    align-items:start;
}

/* COVER */

.book-cover img{

    width:100%;

    border-radius:28px;

    box-shadow:
    0 20px 50px rgba(0,0,0,0.15);
}

/* TITLE */

.book-details h1{

    font-size:64px;

    margin-bottom:25px;

    font-family:'Playfair Display', serif;

    line-height:1.1;
}

/* INTRO */

.book-intro{

    font-size:21px;

    line-height:2;

    color:#444;

    margin-bottom:35px;
}

/* META */

.book-meta{

    display:flex;

    gap:12px;

    flex-wrap:wrap;

    align-items:center;

    margin:22px 0 30px;
}

.book-meta span{

    display:inline-flex;

    align-items:center;

    justify-content:center;

    background:#efe8d2;

    color:#8a7341;

    padding:10px 18px;

    border-radius:30px;

    font-size:15px;

    font-weight:700;

    white-space:nowrap;

    min-height:44px;
}

/* AWARD */

.award-box{

    background:#f7f2e4;

    padding:18px 24px;

    border-radius:16px;

    color:#8a6c2c;

    font-weight:600;

    margin-bottom:35px;

    line-height:1.8;
}

/* CONTENT CARD */

.book-review{

    background:#faf6eb;

    padding:35px;

    border-radius:24px;

    margin-bottom:40px;

    border-left:6px solid #c2a161;
}

.book-review h3{

    margin-bottom:18px;

    font-size:28px;

    font-family:'Playfair Display', serif;
}

.book-review p{

    line-height:2;

    color:#555;
}

/* PURCHASE */

.purchase-box{

    background:#fff;

    padding:35px;

    border-radius:24px;

    box-shadow:
    0 10px 35px rgba(0,0,0,0.06);
}

.purchase-box h3{

    margin-bottom:20px;

    font-size:30px;

    font-family:'Playfair Display', serif;
}

.purchase-box p{

    line-height:1.9;

    color:#555;
}

/* BUTTONS */

.read-online-btn{

    display:inline-block;

    margin-top:20px;

    background:#b79d63;

    color:#fff;

    padding:14px 24px;

    border-radius:12px;

    text-decoration:none;

    font-weight:700;

    transition:0.3s;
}

.read-online-btn:hover{

    transform:translateY(-3px);

    background:#9f8248;
}

/* MOBILE */

@media(max-width:900px){

    .book-layout{

        grid-template-columns:1fr;
    }

    .book-details h1{

        font-size:42px;
    }

    .book-intro{

        font-size:18px;
    }
}
```