body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: #f8f9fa;
}
main {
    flex: 1;
}
.card-book {
    transition: transform 0.15s, box-shadow 0.15s;
    height: 100%;
}
.card-book:hover {
    transform: translateY(-3px);
    box-shadow: 0 0.5rem 1rem rgba(0,0,0,.1);
}
.badge-available {
    background-color: #198754;
}
.badge-unavailable {
    background-color: #dc3545;
}
.table-actions .btn {
    padding: 0.15rem 0.4rem;
    font-size: 0.8rem;
}
.stat-card {
    border-left: 4px solid #0d6efd;
}
.search-hero {
    background: linear-gradient(135deg, #0d6efd 0%, #0a58ca 100%);
    color: white;
    border-radius: 0.5rem;
    padding: 2rem;
    margin-bottom: 1.5rem;
}