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

body{
font-family:Arial,sans-serif;
background:#f6f6f6;
color:#222;
line-height:1.6;
}

.hero{
height:100vh;

background:
linear-gradient(
rgba(0,0,0,.45),
rgba(0,0,0,.55)
),
url("../images/hero.png");

background-size:cover;
background-position:center;

display:flex;
flex-direction:column;
}

nav{
display:flex;
justify-content:space-between;
padding:30px 10%;
color:white;
}

nav ul{
display:flex;
gap:30px;
list-style:none;
}

nav a{
color:white;
text-decoration:none;
}

.hero-content{
flex:1;

display:flex;
flex-direction:column;
justify-content:center;

padding-left:10%;
max-width:700px;
color:white;
}

.hero-content h1{
font-size:5rem;
margin-bottom:20px;
}

.hero-content p{
font-size:1.4rem;
margin-bottom:40px;
}

.buttons{
display:flex;
gap:20px;
}

.btn{
padding:15px 25px;
background:#d4a038;
color:black;
text-decoration:none;
font-weight:bold;
}

.btn-outline{
background:transparent;
border:2px solid white;
color:white;
}

section{
padding:100px 10%;
}

h2{
margin-bottom:40px;
font-size:2.5rem;
}

.books{
display:grid;
grid-template-columns:
repeat(auto-fit,minmax(220px,1fr));

gap:40px;
}

.book img{
width:100%;
border-radius:8px;
}

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

.pdfs a{
padding:15px 25px;
background:#d4a038;
text-decoration:none;
color:black;
}

footer{
background:#111;
color:white;
padding:30px;
text-align:center;
}

@media(max-width:768px){

.hero-content h1{
font-size:2.8rem;
}

.hero-content{
padding:40px;
}

nav{
display:none;
}

}