*{
margin:0;
padding:0;
box-sizing:border-box;
font-family: 'Sahel', sans-serif;}
@font-face {
    font-family: 'Sahel';
    src: url('fonts/SAHEL-BOLD.TTF') format('truetype');
    font-weight: bold;
}

body{
background:#0f172a;
color:#e2e8f0;
line-height:1.7;
}

a{
text-decoration:none;
color:inherit;
}

/* ================= HEADER ================= */

.hero{
background:linear-gradient(135deg,#0ea5e9,#1e293b);
padding:90px 20px 70px;
text-align:center;
}

.logo-wrapper{
position:relative;
display:inline-block;
}

.site-logo{
width:130px;
height:130px;
border-radius:50%;
border:6px solid #fff;
object-fit:cover;
box-shadow:0 15px 35px rgba(0,0,0,0.35);
}

.site-title{
position:absolute;
left:50%;
bottom:-12px;
transform:translateX(-50%);
background:#fff;
color:#0f172a;
padding:7px 20px;
border-radius:30px;
font-size:1.1rem;
font-weight:700;
white-space:nowrap;
box-shadow:0 6px 18px rgba(0,0,0,0.25);
}

.hero-desc{
margin-top:45px;
font-size:1rem;
color:#e0f2fe;
}

/* ================= MAIN ================= */

.container{
max-width:1200px;
margin:-40px auto 60px;
padding:0 20px;
}

/* ================= SECTIONS ================= */

.grade-section{
margin-bottom:45px;
background:#111827;
border-radius:20px;
padding:25px;
border:1px solid rgba(255,255,255,0.05);
box-shadow:0 15px 35px rgba(0,0,0,0.25);
}

.section-title{
margin-bottom:20px;
}

.section-title h2{
font-size:1.6rem;
font-weight:800;
color:#38bdf8;
}

/* ================= BOOK GRID ================= */

.books-grid{
display:grid;
grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
gap:22px;
}

/* ================= BOOK CARD ================= */

.book-card{
position:relative;
overflow:hidden;
border-radius:18px;
background:#1f2937;
aspect-ratio:3/4;
transition:0.3s;
border:1px solid rgba(255,255,255,0.05);
}

.book-card:hover{
transform:translateY(-6px);
box-shadow:0 20px 35px rgba(0,0,0,0.35);
}

.book-card img{
width:100%;
height:100%;
object-fit:cover;
display:block;
}

/* overlay */

.book-overlay{
position:absolute;
bottom:0;
right:0;
left:0;
padding:16px;
background:linear-gradient(to top,rgba(0,0,0,0.85),rgba(0,0,0,0.1));
}

.book-overlay h3{
font-size:1rem;
margin-bottom:4px;
font-weight:700;
}

.book-overlay span{
font-size:0.85rem;
color:#7dd3fc;
}

/* ================= MOBILE ================= */

@media(max-width:768px){

.site-logo{
width:110px;
height:110px;
}

.site-title{
font-size:1rem;
}

.hero-desc{
font-size:0.9rem;
}

.section-title h2{
font-size:1.3rem;
}

}
.hero-channels{
display:flex;
justify-content:flex-end;
gap:15px;
margin-top:20px;
}
.hero-channels{
display:flex;
justify-content:center;
align-items:center;
gap:15px;
margin-top:20px;
}

.channel{
display:flex;
align-items:center;
justify-content:center;
gap:8px;
background:rgba(255,255,255,0.15);
padding:6px 12px;
border-radius:20px;
font-size:0.9rem;
}

.channel img{
width:22px;
height:22px;
object-fit:contain;
}