/* All styles are scoped to the theme-owned discovery surface. */
.nb-discovery, .nb-discovery-archive {
    --nb-discovery-text: #29485b;
    --nb-discovery-muted: #536b7a;
    --nb-discovery-border: #dce5ee;
    --nb-discovery-surface: #f2f6fb;
    --nb-discovery-accent: #2854a0;
    color: var(--nb-discovery-text);
}
.text-ui-light .nb-discovery, .text-ui-light .nb-discovery-archive {
    --nb-discovery-text: #e8edf4;
    --nb-discovery-muted: #b8c7d4;
    --nb-discovery-border: #465462;
    --nb-discovery-surface: #242f3c;
    --nb-discovery-accent: #a6c9ff;
}
.nb-discovery-home { padding: 28px 0 0; margin-bottom: 28px; }
.nb-discovery-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; border-bottom: 1px solid var(--nb-discovery-border); margin-bottom: 20px; }
.nb-discovery-tabs { display: flex; gap: 8px; min-width: 0; }
.nb-discovery-tabs button {
    appearance: none; background: transparent; color: var(--nb-discovery-muted);
    border: 0; border-bottom: 3px solid transparent; border-radius: 0;
    padding: 12px 18px; min-height: 46px; font: inherit; font-weight: 600; cursor: pointer;
}
.nb-discovery-tabs button[aria-selected="true"] { color: var(--nb-discovery-accent); border-bottom-color: var(--nb-discovery-accent); }
.nb-discovery button:focus-visible, .nb-discovery a:focus-visible, .nb-discovery-panel:focus-visible,
.nb-discovery-archive a:focus-visible {
    outline: 3px solid var(--nb-discovery-accent); outline-offset: 3px;
}
.nb-discovery-panel[hidden] { display: none !important; }
.nb-discovery-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px 30px; }
.nb-book { display: block; min-width: 0; padding: 0 0 20px; border-bottom: 1px solid var(--nb-discovery-border); }
.nb-book-image {
    position: relative; display: block; width: 100%; aspect-ratio: 193 / 278; margin-bottom: 10px;
    overflow: hidden; border-radius: 8px; background: var(--nb-discovery-surface);
}
.nb-book-image img { position: absolute; inset: 0; width: 100% !important; height: 100% !important; margin: 0 !important; padding: 0 !important; object-fit: cover; display: block; }
.nb-book-no-cover { display: flex; align-items: center; justify-content: center; height: 100%; color: var(--nb-discovery-muted); }
.nb-book-info { min-width: 0; }
.nb-book h3 { font-size: 16px; line-height: 1.5; min-height: 48px; margin: 9px 0 7px; font-weight: 600; }
.nb-book h3 a, .nb-book-chapter { color: var(--nb-discovery-text); }
.nb-book h3 a { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.nb-book-free-ribbon { position: absolute; z-index: 1; top: 16px; right: -33px; width: 128px; padding: 5px 0; transform: rotate(45deg); background: #177342; color: #fff !important; text-align: center; font-size: 11px; font-weight: 700; line-height: 18px; letter-spacing: 1px; pointer-events: none; box-shadow: 0 2px 4px rgb(0 0 0 / 15%); }
.nb-book-meta, .nb-book-time { color: var(--nb-discovery-muted); font-size: 12px; line-height: 1.6; margin: 6px 0; }
.nb-book-chapter { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; font-size: 13px; line-height: 1.6; padding-top: 4px; }
.nb-discovery-more { display: block; flex-shrink: 0; width: max-content; margin: 0 0 6px; padding: 9px 16px; min-height: 42px; border: 1px solid var(--nb-discovery-border); border-radius: 6px; color: var(--nb-discovery-accent); font-size: 13px; font-weight: 600; }
.nb-discovery-empty { padding: 36px 18px; text-align: center; border: 1px dashed var(--nb-discovery-border); border-radius: 8px; background: var(--nb-discovery-surface); }
.nb-discovery-empty h3 { font-size: 17px; margin: 0 0 10px; color: var(--nb-discovery-text); }
.nb-discovery-empty p { max-width: 540px; margin: 0 auto; color: var(--nb-discovery-muted); font-size: 13px; line-height: 1.7; }
.nb-discovery-archive { padding: 28px 0 40px; }
.nb-discovery-section-nav { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 22px; }
.nb-discovery-section-nav a { color: var(--nb-discovery-muted); padding: 9px 14px; min-height: 42px; border-radius: 6px; border: 1px solid var(--nb-discovery-border); font-size: 13px; }
.nb-discovery-section-nav a[aria-current] { color: var(--nb-discovery-accent); background: var(--nb-discovery-surface); border-color: var(--nb-discovery-accent); }
.nb-discovery-archive-header h1 { font-size: 26px; line-height: 1.4; margin: 0 0 10px; color: var(--nb-discovery-text); }
.nb-discovery-result-count { font-size: 13px; color: var(--nb-discovery-muted); margin-bottom: 20px; }
.nb-discovery-pagination { margin: 28px 0 0; }
.nb-discovery-pagination ul { display: flex; flex-wrap: wrap; justify-content: center; list-style: none; gap: 8px; padding: 0; }
.nb-discovery-pagination li { margin: 0; }
.nb-discovery-pagination a, .nb-discovery-pagination span { display: block; min-width: 42px; padding: 10px 12px; text-align: center; border: 1px solid var(--nb-discovery-border); border-radius: 6px; color: var(--nb-discovery-text); }
.nb-discovery-pagination .current { background: var(--nb-discovery-surface); color: var(--nb-discovery-accent); border-color: var(--nb-discovery-accent); }
/* The site's existing universal !important color must not wash out this new UI. */
.nb-discovery-tabs button,
.nb-discovery-section-nav a { color: var(--nb-discovery-muted) !important; }
.nb-discovery-tabs button[aria-selected="true"],
.nb-discovery-section-nav a[aria-current],
.nb-discovery-more, .nb-discovery-more span,
.nb-discovery-pagination .current { color: var(--nb-discovery-accent) !important; }
.nb-book h3, .nb-book h3 a, .nb-book-chapter,
.nb-discovery-archive-header h1, .nb-discovery-empty h3,
.nb-discovery-pagination a, .nb-discovery-pagination span { color: var(--nb-discovery-text) !important; }
.nb-book-meta, .nb-book-time, .nb-discovery-empty p,
.nb-discovery-result-count { color: var(--nb-discovery-muted) !important; }
@media (min-width: 992px) {
    .nb-discovery-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
@media (max-width: 767px) {
    .nb-discovery-home { padding-top: 16px; margin-bottom: 24px; }
    .nb-discovery-heading { flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
    .nb-discovery-tabs { gap: 0; width: 100%; }
    .nb-discovery-tabs button { flex: 1; min-width: 0; padding: 12px 4px; font-size: 12px; white-space: nowrap; }
    .nb-discovery-more { margin-left: auto; padding: 9px 12px; font-size: 12px; }
    .nb-discovery-grid { gap: 20px 14px; }
    .nb-book { display: block; padding-bottom: 14px; }
    .nb-book-image { display: block; width: 100%; margin: 0 0 10px; }
    .nb-book h3 { font-size: 14px; line-height: 21px; min-height: 42px; margin: 7px 0 4px; }
    .nb-book-meta, .nb-book-time { font-size: 11px; }
    .nb-book-chapter { font-size: 12px; }
    .nb-discovery-archive { padding-top: 18px; }
    .nb-discovery-archive-header h1 { font-size: 22px; }
    .nb-discovery-section-nav { flex-wrap: nowrap; gap: 6px; }
    .nb-discovery-section-nav a { flex: 1; text-align: center; font-size: 11px; padding: 10px 4px; white-space: nowrap; }
    .nb-discovery-page #darklight_toggle { left: auto; right: 16px; bottom: 96px; }
}