:root{
    --brown:#5C4033;
    --gold:#D4AF37;
    --cream:#F8F4E9;
    --white:#ffffff;
    --shadow:0 5px 15px rgba(0,0,0,.1);
}

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

body{
    background:var(--cream);
    font-family:'Segoe UI',sans-serif;
}

.sidebar{
    position:fixed;
    width:250px;
    height:100vh;
    background:var(--brown);
    color:white;
    padding:20px;
}

.logo-area{
    text-align:center;
    margin-bottom:30px;
}

.logo-area img{
    width:80px;
    height:80px;
    object-fit:cover;
    border-radius:50%;
    border:3px solid var(--gold);
}

.logo-area h3{
    margin-top:10px;
}

.sidebar a{
    display:block;
    color:white;
    text-decoration:none;
    padding:12px;
    margin-bottom:8px;
    border-radius:8px;
}

.sidebar a:hover{
    background:var(--gold);
    color:black;
}

.main{
    margin-left:270px;
    padding:25px;
}

.topbar{
    background:white;
    padding:15px 20px;
    border-radius:15px;
    box-shadow:var(--shadow);
    margin-bottom:25px;
}

.cards{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
    gap:20px;
    margin-bottom:25px;
}

.card-box{
    background:white;
    padding:25px;
    border-radius:15px;
    box-shadow:var(--shadow);
}

.card-box h2{
    color:var(--brown);
}

.book-grid{
    display:grid;
    grid-template-columns:repeat(auto-fill,minmax(250px,1fr));
    gap:20px;
}

.book-card{
    background:white;
    border-radius:15px;
    overflow:hidden;
    box-shadow:var(--shadow);
    transition:.3s;
}

.book-card:hover{
    transform:translateY(-5px);
}

.book-cover{
    width:100%;
    height:250px;
    object-fit:cover;
}

.book-content{
    padding:15px;
}

.book-title{
    font-size:18px;
    font-weight:bold;
    color:var(--brown);
}

.price{
    color:var(--gold);
    font-size:18px;
    font-weight:bold;
}

.status{
    display:inline-block;
    padding:5px 10px;
    border-radius:20px;
    font-size:12px;
}

.available{
    background:#198754;
    color:white;
}

.notavailable{
    background:#dc3545;
    color:white;
}