.curriculum-library-section {
    padding: 28px 0 24px 0;
}
.library-header {
    text-align: center;
    margin-bottom: 36px;
}
.library-header h1 {
    font-size: 1.8rem;
    font-weight: 800;
    color: #1d1d1f;
    margin-bottom: 4px;
    letter-spacing: -0.02em;
}
.library-heading {
    font-size: 1.5rem;
    font-weight: 800;
    color: #1d1d1f;
    margin-bottom: 6px;
    letter-spacing: -0.02em;
}
.library-intro {
    font-size: 1.1rem; /* Slightly larger for better readability */
    color: #4a5568;    /* A softer grey than #555 */
    max-width: 540px;  /* Slightly narrower to force a cleaner 2 or 3 line wrap */
    margin: 0 auto;
    padding: 0 20px;
    line-height: 1.6;
    text-wrap: balance; /* Prevents single words (orphans) on the last line */
}
.book-grid {
    max-width: 880px;
    margin: 0 auto;
}
.testament-group {
    margin-bottom: 32px;
}
.testament-label {
    font-size: 1.1rem;
    font-weight: 700;
    padding: 10px 16px;
    border-radius: 6px 6px 0 0;
    margin-bottom: 0;
}
.testament-label--ot {
    background: #1a365d;
    color: #ffffff;
}
.testament-label--nt {
    background: #c05621;
    color: #ffffff;
}
.book-cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
    border: 2px solid #e2e8f0;
    border-top: none;
    border-radius: 0 0 6px 6px;
    overflow: hidden;
}
.book-card {
    display: block;
    padding: 14px 20px;
    background: #ffffff;
    text-decoration: none;
    color: inherit;
    border-bottom: 1px solid #e2e8f0;
    transition: background-color 0.15s ease, box-shadow 0.15s ease;
    position: relative;
}
.book-card:last-child {
    border-bottom: none;
}
.book-card:hover {
    background: #f7fafc;
    box-shadow: inset 4px 0 0 #4a6fa5;
}
.book-card--nt:hover {
    box-shadow: inset 4px 0 0 #c05621;
}
.book-card-icon {
    font-size: 1rem;
    display: inline;
    margin-right: 6px;
    vertical-align: middle;
}
.book-card-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: #1a365d;
    margin-bottom: 2px;
    display: inline;
    vertical-align: middle;
}
.book-card--nt .book-card-title {
    color: #c05621;
}
.book-card-meta {
    font-size: 0.85rem;
    color: #718096;
    font-weight: 600;
    margin-bottom: 4px;
    margin-top: 4px;
    display: block;
}
.book-card-desc {
    font-size: 0.88rem;
    color: #4a5568;
    line-height: 1.45;
    margin-bottom: 0;
}
@media (min-width: 600px) {
    .book-cards {
        grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    }
    .book-card {
        border-bottom: none;
        border-right: 1px solid #e2e8f0;
    }
    .book-card:last-child {
        border-right: none;
    }
}
@media (max-width: 599px) {
    .library-header h1 {
        font-size: 1.5rem;
    }
    .book-card {
        padding: 12px 16px;
    }
}