/* Variables */
:root {
    --primary: #176187;
    --secondary: #6c757d;
    --success: #28a745;
    --info: #17a2b8;
    --warning: #ffc107;
    --danger: #dc3545;
    --light: #f8f9fa;
    --dark: #343a40;
}

/* General */
body {
    font-family: 'Roboto', Arial, sans-serif;
    color: #333;
    background-color: #f5f5f5;
}

a {
    color: var(--primary);
    transition: color 0.2s;
}

a:hover {
    color: #176187;
    text-decoration: none;
}

/* Header */
.top-header {
    background-color: #fff !important;
}

.navbar {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Cards */
.card {
    border: none;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.card-header {
    background-color: #fff;
    border-bottom: 2px solid var(--primary);
    font-weight: 600;
}

.card-header.bg-primary {
    background-color: var(--primary) !important;
    border-bottom: none;
}

/* Book display */
.book-description {
    line-height: 1.7;
}

.book-toc {
    line-height: 1.7;
}

/* Pagination */
.pagination .page-item.active .page-link {
    background-color: var(--primary);
    border-color: var(--primary);
}

.pagination .page-link {
    color: var(--primary);
}

/* Footer */
footer {
    background-color: var(--dark);
}

footer a:hover {
    color: #fff !important;
    text-decoration: underline !important;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .jumbotron {
        padding: 2rem 1rem;
    }

    .card-deck .card {
        margin-bottom: 20px;
    }
}