* { 
    margin : 0;
    padding: 0;
    box-sizing : border-box;
    font-family : "Poppins", sans-serif;
}
body {
    background-color: #f0f0f0;
    background-image: url('https://www.nerdwallet.com/assets/blog/wp-content/uploads/2017/10/GettyImages-947995974-1920x1080.jpg');
    background-position: center;
    background-size: cover;
    background-attachment: fixed;
    padding:0;
    margin:0;

}
.back_img{
    background-color: rgba(139, 139, 139, 0.449);
    width: 80%;
    margin: auto;
    padding: 80px;
}
.container {

    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3.5rem;

}

.container .card {
position: relative;
max-width: 320px;
background-color: var(--color-card, #fff);
margin: 15px 10px;
padding: 0 0 20px;
overflow: hidden;

display: flex;
flex-direction: column;
box-shadow: var(--shadow-md, 0 5px 20px rgba(0,0,0,0.25));
transition: transform 0.3s ease-in-out, box-shadow 0.3s ease-in-out;
border-radius: var(--radius-lg, 15px);
}

.container .card:hover {
transform: translateY(-6px);
box-shadow: var(--shadow-lg, 0 10px 30px rgba(0,0,0,0.3));
}

.container .card .image {
position: relative;
width: 100%;
height: 260px;
z-index: 1;
overflow: hidden;
transition: height 0.35s ease-in-out;
}

.container .card:hover .image {
height: 320px;
}

.container .card .image img {
max-width: 100%;
width: 100%;
height: 100%;
object-fit: cover;
object-position: top center;
display: block;
transition: transform 0.35s ease-in-out;
}

.container .card:hover .image img {
transform: scale(1.05);
}

.container .card .content {
position: relative;
padding: 16px 18px 0;
color: #111;
text-align: center;
}

.container .card .content h3 {
font-size: var(--text-card, 20px);
margin-bottom: 4px;
}

.container .card .content .description {
font-size: var(--text-caption, 14px);
color: #4b5563;
line-height: 1.5;
margin: 8px 0 4px;
}

#Book {
    margin-top: 10px;
    padding: 10px 35px;
    border: 0;
    border-radius: var(--radius-full, 999px);
    background: var(--gradient-primary, black);
    color: white;
    cursor: pointer;
    font-weight: 600;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

#Book:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-primary, none);
}

@media (max-width: 1024px) {
    .back_img {
        width: 90%;
        padding: 60px 30px;
    }

    .container {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
}

@media (max-width: 640px) {
    .back_img {
        width: 95%;
        padding: 40px 15px;
    }

    .container {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .container .card {
        margin: 30px auto;
    }
}