/*
 * NFA Academy — Phase 7 Styles
 * Essay Library · Advanced Filters · Gold Standard · Related Subjects
 *
 * Depends on library.css (already enqueued for Subject Library pages).
 * All NFA brand tokens (--nfa-navy, --nfa-gold, etc.) defined in lesson-viewer.css
 * and subject-profile.css. Fallbacks provided here for standalone use.
 */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;700&family=Source+Serif+4:ital,opsz,wght@0,8..60,400;0,8..60,600;1,8..60,400&family=Space+Mono:wght@400;700&display=swap');

/* ── Phase 7 root token fallbacks ─────────────────────────────────────────── */
.nfa-essay-library-wrap,
.nfa-gold-standard-section,
.nfa-related-section,
.nfa-adv-filters-wrap {
    --nfa-navy:    #1e2855;
    --nfa-gold:    #E8C84A;
    --nfa-green:   #1A5C2E;
    --nfa-cream:   #FAF8F2;
    --nfa-text:    #1a1a1a;
    --nfa-muted:   #666;
    --nfa-border:  #e0d8cc;
    --ff-display:  'Playfair Display', Georgia, serif;
    --ff-body:     'Source Serif 4', Georgia, serif;
    --ff-mono:     'Space Mono', monospace;
}

/* ════════════════════════════════════════════════════════════════════════════
   7.1 — ESSAY LIBRARY TABS
   ════════════════════════════════════════════════════════════════════════════ */

.nfa-essay-tabs {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--nfa-border);
    margin-bottom: 24px;
}

.nfa-essay-tab {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    font-family: var(--ff-mono);
    font-size: 0.82rem;
    font-weight: 700;
    text-decoration: none;
    color: var(--nfa-muted);
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
    letter-spacing: .04em;
    transition: color .15s, border-color .15s;
}

.nfa-essay-tab:hover {
    color: var(--nfa-navy);
}

.nfa-essay-tab.active {
    color: var(--nfa-navy);
    border-bottom-color: var(--nfa-navy);
}

.nfa-tab-count {
    background: var(--nfa-navy);
    color: var(--nfa-gold);
    font-size: 0.68rem;
    padding: 1px 7px;
    border-radius: 10px;
}

.nfa-essay-tab.active .nfa-tab-count {
    background: var(--nfa-gold);
    color: var(--nfa-navy);
}

/* ── Essay filter row ──────────────────────────────────────────────────────── */

.nfa-essay-filters {
    gap: 10px;
}

.nfa-filter-group--sm {
    flex: 0 0 140px;
    min-width: 120px;
}

.nfa-filter-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.nfa-filter-apply {
    padding: 10px 20px;
    background: var(--nfa-navy);
    color: var(--nfa-gold);
    font-family: var(--ff-mono);
    font-size: 0.78rem;
    font-weight: 700;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    letter-spacing: .04em;
    transition: background .15s;
}
.nfa-filter-apply:hover { background: #2a3870; }

.nfa-filter-reset {
    font-family: var(--ff-mono);
    font-size: 0.75rem;
    color: var(--nfa-muted);
    text-decoration: none;
}
.nfa-filter-reset:hover { color: var(--nfa-navy); text-decoration: underline; }

/* ── Results bar ───────────────────────────────────────────────────────────── */

.nfa-library-results-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    font-family: var(--ff-mono);
    font-size: 0.78rem;
    color: var(--nfa-muted);
}

.nfa-result-count strong { color: var(--nfa-text); }

/* ── Essay card (extends .nfa-subject-card) ────────────────────────────────── */

.nfa-essay-card .nfa-card-body {
    padding: 14px 16px 10px;
}

.nfa-card-badges {
    position: absolute;
    top: 10px;
    right: 10px;
    display: flex;
    gap: 6px;
}

.nfa-card-letter-badge {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--nfa-navy);
    color: var(--nfa-gold);
    font-family: var(--ff-mono);
    font-weight: 700;
    font-size: 0.78rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nfa-essay-type-badge {
    font-family: var(--ff-mono);
    font-size: 0.68rem;
    font-weight: 700;
    padding: 3px 7px;
    border-radius: 3px;
    letter-spacing: .05em;
}

.nfa-type-pa .nfa-essay-type-badge {
    background: #e8f5e9;
    color: #1b5e20;
    border: 1px solid #a5d6a7;
}

.nfa-type-as .nfa-essay-type-badge {
    background: #e8eaf6;
    color: #1a237e;
    border: 1px solid #9fa8da;
}

/* PA / AS card accent border */
.nfa-type-pa { border-top: 3px solid #4caf50; }
.nfa-type-as { border-top: 3px solid #3f51b5; }

.nfa-essay-type-label {
    font-family: var(--ff-mono);
    font-size: 0.72rem;
    color: var(--nfa-muted);
    margin: 0 0 8px;
}

.nfa-essay-card-meta {
    display: flex;
    gap: 10px;
    font-family: var(--ff-mono);
    font-size: 0.72rem;
    color: var(--nfa-muted);
    margin-top: 6px;
    flex-wrap: wrap;
}

.nfa-card-footer {
    padding: 10px 16px 14px;
    margin-top: auto;
}

.nfa-card-link {
    font-family: var(--ff-mono);
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--nfa-navy);
    text-decoration: none;
    letter-spacing: .03em;
}
.nfa-card-link:hover { text-decoration: underline; }

.nfa-card-initials {
    font-family: var(--ff-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--nfa-navy);
    opacity: 0.35;
}

/* ── Empty state ───────────────────────────────────────────────────────────── */
.nfa-library-empty {
    grid-column: 1 / -1;
    padding: 48px;
    text-align: center;
    background: var(--nfa-cream);
    border: 1.5px dashed var(--nfa-border);
    border-radius: 4px;
}
.nfa-library-empty a { color: var(--nfa-navy); }

/* ── Pagination ────────────────────────────────────────────────────────────── */
.nfa-pagination {
    display: flex;
    justify-content: center;
    gap: 6px;
    margin-top: 32px;
}
.nfa-pagination .page-numbers {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px; height: 36px;
    font-family: var(--ff-mono);
    font-size: 0.78rem;
    border: 1.5px solid var(--nfa-border);
    border-radius: 3px;
    text-decoration: none;
    color: var(--nfa-navy);
    transition: background .15s, border-color .15s;
}
.nfa-pagination .page-numbers:hover { background: var(--nfa-cream); border-color: var(--nfa-navy); }
.nfa-pagination .page-numbers.current { background: var(--nfa-navy); color: var(--nfa-gold); border-color: var(--nfa-navy); }
.nfa-pagination .page-numbers.dots { border: none; width: auto; }
.nfa-pagination .prev, .nfa-pagination .next { width: auto; padding: 0 12px; }

/* ════════════════════════════════════════════════════════════════════════════
   7.2 — ADVANCED FILTERS PANEL
   ════════════════════════════════════════════════════════════════════════════ */

.nfa-adv-filters-wrap {
    margin-bottom: 20px;
    border: 1.5px solid var(--nfa-border);
    border-radius: 3px;
    overflow: hidden;
}

.nfa-adv-toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 12px 18px;
    background: var(--nfa-cream);
    border: none;
    font-family: var(--ff-mono);
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--nfa-navy);
    cursor: pointer;
    text-align: left;
    letter-spacing: .03em;
}
.nfa-adv-toggle:hover { background: #f0ede6; }

.nfa-adv-active-badge {
    background: #fff3e0;
    color: #e65100;
    font-size: 0.68rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 10px;
    border: 1px solid #ffcc80;
}

.nfa-adv-chevron {
    margin-left: auto;
    transition: transform .25s;
    font-size: 1rem;
}
.nfa-adv-toggle[aria-expanded="true"] .nfa-adv-chevron { transform: rotate(180deg); }

.nfa-adv-panel {
    padding: 20px 18px 18px;
    border-top: 1.5px solid var(--nfa-border);
    background: #fff;
}

.nfa-adv-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 16px;
}

.nfa-adv-field { display: flex; flex-direction: column; gap: 8px; }
.nfa-adv-field--full { grid-column: 1 / -1; }

.nfa-adv-legend {
    font-family: var(--ff-mono);
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .08em;
    color: var(--nfa-muted);
    border: none;
    padding: 0;
    margin: 0;
}

.nfa-adv-multiselect-hint {
    font-size: 0.68rem;
    font-weight: 400;
    text-transform: none;
    letter-spacing: 0;
    color: var(--nfa-muted);
}

/* Radio group */
.nfa-adv-radio-group { display: flex; flex-direction: column; gap: 6px; }
.nfa-adv-radio {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.88rem;
    cursor: pointer;
    line-height: 1.4;
}
.nfa-adv-radio input { accent-color: var(--nfa-navy); }

/* Location autocomplete */
.nfa-location-suggestions {
    position: absolute;
    z-index: 100;
    background: #fff;
    border: 1.5px solid var(--nfa-border);
    border-top: none;
    border-radius: 0 0 3px 3px;
    box-shadow: 0 4px 12px rgba(0,0,0,.08);
    max-height: 180px;
    overflow-y: auto;
}
.nfa-location-suggestion {
    padding: 8px 14px;
    font-size: 0.88rem;
    cursor: pointer;
}
.nfa-location-suggestion:hover { background: var(--nfa-cream); }

/* Era range slider */
.nfa-era-range-wrap { display: flex; flex-direction: column; gap: 10px; }
.nfa-era-range-display {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--ff-mono);
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--nfa-navy);
}
.nfa-era-range-sep { color: var(--nfa-muted); }

.nfa-range-sliders { position: relative; height: 28px; }
.nfa-range-input {
    position: absolute;
    left: 0; right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 100%;
    -webkit-appearance: none;
    appearance: none;
    height: 4px;
    background: transparent;
    outline: none;
    pointer-events: none;
}
.nfa-range-input::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px; height: 18px;
    border-radius: 50%;
    background: var(--nfa-navy);
    border: 2px solid #fff;
    box-shadow: 0 1px 4px rgba(0,0,0,.2);
    cursor: pointer;
    pointer-events: all;
    transition: background .15s;
}
.nfa-range-input::-moz-range-thumb {
    width: 18px; height: 18px;
    border-radius: 50%;
    background: var(--nfa-navy);
    border: 2px solid #fff;
    cursor: pointer;
    pointer-events: all;
}
.nfa-range-input.nfa-range-min { z-index: 2; }
.nfa-range-input.nfa-range-max { z-index: 1; }

/* Domain multi-select */
.nfa-domain-multiselect {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.nfa-domain-check {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border: 1.5px solid var(--nfa-border);
    border-radius: 20px;
    font-size: 0.83rem;
    cursor: pointer;
    transition: border-color .15s, background .15s;
    user-select: none;
}
.nfa-domain-check:hover { border-color: var(--nfa-navy); background: var(--nfa-cream); }
.nfa-domain-check input { accent-color: var(--nfa-navy); }
.nfa-domain-check:has(input:checked) {
    border-color: var(--nfa-navy);
    background: var(--nfa-navy);
    color: var(--nfa-gold);
}

.nfa-clear-domains {
    font-family: var(--ff-mono);
    font-size: 0.72rem;
    color: var(--nfa-muted);
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    text-decoration: underline;
    margin-top: 4px;
}

/* Advanced filter action row */
.nfa-adv-actions {
    display: flex;
    align-items: center;
    gap: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--nfa-border);
}
.nfa-adv-apply {
    padding: 10px 24px;
    background: var(--nfa-navy);
    color: var(--nfa-gold);
    font-family: var(--ff-mono);
    font-size: 0.8rem;
    font-weight: 700;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    letter-spacing: .04em;
    transition: background .15s;
}
.nfa-adv-apply:hover { background: #2a3870; }
.nfa-adv-clear {
    font-family: var(--ff-mono);
    font-size: 0.75rem;
    color: var(--nfa-muted);
    text-decoration: none;
}
.nfa-adv-clear:hover { color: var(--nfa-navy); text-decoration: underline; }

/* ════════════════════════════════════════════════════════════════════════════
   7.3 — GOLD STANDARD SECTION
   ════════════════════════════════════════════════════════════════════════════ */

.nfa-gold-standard-section {
    background: #fffbef;
    border: 2px solid var(--nfa-gold);
    border-radius: 4px;
    padding: 32px;
    margin: 40px 0;
}

.nfa-gs-header { text-align: center; margin-bottom: 28px; }

.nfa-gs-title {
    font-family: var(--ff-display);
    font-size: 1.6rem;
    color: var(--nfa-navy);
    margin: 0 0 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.nfa-gs-star { font-size: 1.4rem; }

.nfa-gs-subtitle {
    font-size: 0.93rem;
    color: var(--nfa-muted);
    margin: 0;
    line-height: 1.55;
}

.nfa-gs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

/* Gold Standard card */
.nfa-gs-card {
    background: #fff;
    border: 1.5px solid #f0c040;
    border-radius: 4px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    box-shadow: 0 2px 8px rgba(232, 200, 74, 0.15);
}

.nfa-gs-card-top {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.nfa-gs-medal { font-size: 1.5rem; flex-shrink: 0; margin-top: 2px; }

.nfa-gs-subject-info { flex: 1; min-width: 0; }

.nfa-gs-subject-name {
    display: block;
    font-family: var(--ff-display);
    font-weight: 700;
    font-size: 1rem;
    color: var(--nfa-navy);
    text-decoration: none;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.nfa-gs-subject-name:hover { text-decoration: underline; }

.nfa-gs-meta {
    font-family: var(--ff-mono);
    font-size: 0.68rem;
    color: var(--nfa-muted);
    text-transform: uppercase;
    letter-spacing: .05em;
    margin-top: 3px;
    display: block;
}

.nfa-gs-type-badge {
    font-family: var(--ff-mono);
    font-size: 0.65rem;
    background: #fff3e0;
    color: #e65100;
    border: 1px solid #ffcc80;
    padding: 2px 7px;
    border-radius: 10px;
    flex-shrink: 0;
    white-space: nowrap;
}

/* Excerpt */
.nfa-gs-excerpt {
    margin: 0;
    padding: 0 0 0 14px;
    border-left: 3px solid var(--nfa-gold);
    font-family: var(--ff-body);
    font-style: italic;
    font-size: 0.9rem;
    line-height: 1.65;
    color: #444;
    flex: 1;
}
.nfa-gs-excerpt p { margin: 0; }

/* Footer */
.nfa-gs-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
    padding-top: 10px;
    border-top: 1px solid #f0c04040;
}

.nfa-gs-byline {
    font-family: var(--ff-mono);
    font-size: 0.72rem;
    color: var(--nfa-muted);
}

/* Opt-in form */
.nfa-gs-optin-form { display: flex; }
.nfa-gs-optin-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-family: var(--ff-mono);
    font-size: 0.68rem;
    color: var(--nfa-muted);
    cursor: pointer;
}
.nfa-gs-optin-checkbox { accent-color: var(--nfa-navy); }

/* ════════════════════════════════════════════════════════════════════════════
   7.4 — RELATED SUBJECTS PANEL
   ════════════════════════════════════════════════════════════════════════════ */

.nfa-related-section {
    border-top: 2px solid var(--nfa-border);
    padding-top: 40px;
    margin-top: 48px;
}

.nfa-related-header {
    margin-bottom: 24px;
}

.nfa-related-title {
    font-family: var(--ff-display);
    font-size: 1.5rem;
    color: var(--nfa-navy);
    margin: 0 0 6px;
}

.nfa-related-subtitle {
    font-size: 0.88rem;
    color: var(--nfa-muted);
    margin: 0;
}

/* Related grid */
.nfa-related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}

.nfa-related-card {
    border: 1.5px solid var(--nfa-border);
    border-radius: 4px;
    overflow: hidden;
    background: var(--nfa-cream);
    transition: border-color .2s, transform .2s, box-shadow .2s;
}
.nfa-related-card:hover {
    border-color: var(--nfa-navy);
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(0,0,0,.09);
}

.nfa-related-card-link {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: inherit;
    height: 100%;
}

.nfa-related-thumb {
    height: 130px;
    background: #e0dbd0;
    overflow: hidden;
    position: relative;
    flex-shrink: 0;
}

.nfa-related-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    display: block;
}

.nfa-related-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #e8e3d8;
}

.nfa-related-initials {
    font-family: var(--ff-display);
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--nfa-navy);
    opacity: 0.3;
}

.nfa-related-body {
    padding: 12px 14px 14px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
}

.nfa-related-name {
    font-family: var(--ff-display);
    font-size: 0.97rem;
    font-weight: 700;
    color: var(--nfa-navy);
    margin: 0;
    line-height: 1.25;
}
.nfa-related-card:hover .nfa-related-name { text-decoration: underline; }

.nfa-related-summary {
    font-size: 0.82rem;
    color: var(--nfa-muted);
    margin: 0;
    line-height: 1.4;
}

.nfa-related-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-top: 4px;
}

.nfa-related-tag {
    font-family: var(--ff-mono);
    font-size: 0.64rem;
    background: #ede8df;
    color: var(--nfa-muted);
    padding: 2px 7px;
    border-radius: 10px;
}

.nfa-related-reason {
    font-family: var(--ff-mono);
    font-size: 0.64rem;
    color: var(--nfa-green);
    margin-top: auto;
    padding-top: 8px;
}

/* ── Shared utility ────────────────────────────────────────────────────────── */
.nfa-sr-only {
    position: absolute; width: 1px; height: 1px;
    padding: 0; margin: -1px; overflow: hidden;
    clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ── Responsive ────────────────────────────────────────────────────────────── */
@media (max-width: 680px) {
    .nfa-essay-tabs { overflow-x: auto; }
    .nfa-essay-tab  { padding: 10px 14px; white-space: nowrap; }
    .nfa-adv-grid   { grid-template-columns: 1fr; }
    .nfa-gs-grid    { grid-template-columns: 1fr; }
    .nfa-related-grid { grid-template-columns: repeat(2, 1fr); }
    .nfa-gold-standard-section { padding: 20px; }
}

@media (max-width: 440px) {
    .nfa-related-grid { grid-template-columns: 1fr; }
}