/* =========================
   RESET
========================= */

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

html{
    scroll-behavior:smooth;
}

body{
    font-family:'Inter',sans-serif;
    background:#faf8f3;
    color:#111;
    overflow-x:hidden;
    line-height:1.7;
}

/* =========================
   CONTAINER
========================= */

.container{
    width:min(1180px,90%);
    margin:auto;
}

/* =========================
   NAVBAR
========================= */

header{
    position:fixed;
    width:100%;
    top:0;
    left:0;
    z-index:1000;
    background:rgba(255,255,255,.88);
    backdrop-filter:blur(14px);
    border-bottom:1px solid rgba(0,0,0,.05);
}

.navbar{
    display:flex;
    justify-content:space-between;
    align-items:center;
    height:80px;
}

.logo{
    text-decoration:none;
    font-family:'Poppins',sans-serif;
    font-size:30px;
    font-weight:800;
    color:#111;
}

.logo span{
    color:#d4a017;
}

nav{
    display:flex;
    gap:32px;
}

nav a{
    text-decoration:none;
    color:#333;
    font-weight:600;
    transition:.3s;
}

nav a:hover{
    color:#d4a017;
}

/* =========================
   HERO
========================= */

.hero{
    min-height:100vh;
    display:flex;
    align-items:center;
    padding-top:100px;
}

.hero-grid{
    display:grid;
    grid-template-columns:1fr 1fr;
    align-items:center;
    gap:70px;
}

.tag{
    display:inline-block;
    background:#fff4d7;
    color:#b57b00;
    padding:10px 18px;
    border-radius:999px;
    font-weight:700;
    margin-bottom:22px;
}

.hero h1{
    font-family:'Poppins',sans-serif;
    font-size:72px;
    font-weight:800;
    line-height:1.05;
    margin-bottom:18px;
}

.hero h1 span{
    display:block;
    color:#d4a017;
}

.hero-text{
    font-size:20px;
    color:#555;
    margin-bottom:40px;
    max-width:560px;
}

/* =========================
   BUTTONS
========================= */

.hero-buttons{
    display:flex;
    gap:20px;
    flex-wrap:wrap;
}

.btn-primary,
.btn-secondary{

    padding:16px 32px;

    border-radius:10px;

    text-decoration:none;

    font-weight:700;

    transition:.35s;

}

.btn-primary{

    background:#111;

    color:#fff;

}

.btn-primary:hover{

    transform:translateY(-4px);

    background:#d4a017;

    color:#111;

}

.btn-secondary{

    border:2px solid #111;

    color:#111;

}

.btn-secondary:hover{

    background:#111;

    color:#fff;

}

/* =========================
   BOOK IMAGE
========================= */

.hero-image{
    display:flex;
    justify-content:center;
    align-items:center;
}

.hero-image img{

    width:100%;

    max-width:500px;

    filter:drop-shadow(0 40px 40px rgba(0,0,0,.25));

    animation:floatBook 5s ease-in-out infinite;

}

@keyframes floatBook{

    0%{

        transform:translateY(0px) rotate(-5deg);

    }

    50%{

        transform:translateY(-18px) rotate(-2deg);

    }

    100%{

        transform:translateY(0px) rotate(-5deg);

    }

}

/* =========================
   FEATURED
========================= */

.featured{

    padding:100px 0;

}

.featured h2{

    font-family:'Poppins',sans-serif;

    font-size:46px;

    text-align:center;

    margin-bottom:60px;

}

.book-card{

    background:#fff;

    border-radius:22px;

    padding:40px;

    display:flex;

    gap:40px;

    align-items:center;

    box-shadow:0 20px 45px rgba(0,0,0,.08);

    transition:.35s;

}

.book-card:hover{

    transform:translateY(-8px);

}

.book-card img{

    width:220px;

}

.book-card h3{

    font-family:'Poppins',sans-serif;

    font-size:34px;

    margin-bottom:18px;

}

.book-card p{

    color:#666;

    margin-bottom:24px;

}

.book-card a{

    text-decoration:none;

    color:#d4a017;

    font-weight:700;

}

/* =========================
   ABOUT
========================= */

#about{

    padding:100px 0;

    text-align:center;

}

#about h2{

    font-size:46px;

    font-family:'Poppins',sans-serif;

    margin-bottom:20px;

}

#about p{

    font-size:19px;

    max-width:760px;

    margin:auto;

    color:#555;

}

/* =========================
   FOOTER
========================= */

footer{

    background:#111;

    color:#fff;

    text-align:center;

    padding:45px 20px;

    margin-top:90px;

}
```css
/* ==========================
   Premium Buy Button
========================== */

.buy-btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    margin-right:18px;
    margin-top:15px;
    padding:18px 42px;
    background:linear-gradient(135deg,#d4a017,#f4c542);
    color:#111;
    text-decoration:none;
    font-size:18px;
    font-weight:700;
    font-family:'Poppins',sans-serif;
    border-radius:60px;
    box-shadow:0 15px 35px rgba(212,160,23,.35);
    transition:.35s ease;
    position:relative;
    overflow:hidden;
}

.buy-btn span{
    position:relative;
    z-index:2;
}

.buy-btn::before{
    content:"";
    position:absolute;
    top:0;
    left:-100%;
    width:100%;
    height:100%;
    background:rgba(255,255,255,.25);
    transform:skewX(-25deg);
    transition:.6s;
}

.buy-btn:hover::before{
    left:120%;
}

.buy-btn:hover{
    transform:translateY(-6px) scale(1.03);
    box-shadow:0 25px 50px rgba(212,160,23,.45);
}

.buy-btn:active{
    transform:scale(.98);
}
/* =========================
   RESPONSIVE
========================= */

@media(max-width:992px){

.hero-grid{

grid-template-columns:1fr;

text-align:center;

}

.hero-text{

margin:auto;

}

.hero-buttons{

justify-content:center;

}

.hero h1{

font-size:58px;

}

.book-card{

flex-direction:column;

text-align:center;

}

}

@media(max-width:768px){

nav{

display:none;

}

.hero{

padding-top:120px;

}

.hero h1{

font-size:46px;

}

.hero-text{

font-size:18px;

}

.book-card img{

width:180px;

}

.featured h2,

#about h2{

font-size:36px;

}

}

@media(max-width:480px){

.hero h1{

font-size:38px;

}

.btn-primary,

.btn-secondary{

width:100%;

text-align:center;

}

}