/*
 * NFA Academy — Phase 10 Styles
 * Analytics: Student dashboard · Class analytics · Admin content metrics · Report scheduler
 */

/* ── CSS variables (inherited from Phase 9 or re-declared) ──────────────── */
.nfa-analytics-wrap,
.nfa-class-analytics,
.nfa-analytics-admin,
.nfa-analytics-overview,
.nfa-analytics-empty,
.nfa-analytics-gate {
    --nfa-navy:   #1e2855;
    --nfa-gold:   #E8C84A;
    --nfa-green:  #1A5C2E;
    --nfa-rust:   #8B3A1A;
    --nfa-cream:  #FAF8F2;
    --nfa-muted:  #666;
    --nfa-border: #ddd;
    --ff-display: 'Playfair Display', Georgia, serif;
    --ff-body:    'Source Serif 4', Georgia, serif;
    --ff-mono:    'Space Mono', monospace;
    font-family: var(--ff-body);
    color: #1a1a1a;
}

/* ── Gate / empty states ────────────────────────────────────────────────── */
.nfa-analytics-gate,
.nfa-analytics-empty {
    text-align: center;
    padding: 60px 20px;
    background: var(--nfa-cream);
    border: 1.5px solid var(--nfa-border);
    border-radius: 6px;
    max-width: 520px;
    margin: 0 auto;
}
.nfa-analytics-gate p, .nfa-analytics-empty p {
    font-size: 1rem;
    color: var(--nfa-muted);
    margin-bottom: 16px;
}

/* ── Analytics header + streak banner ──────────────────────────────────── */
.nfa-analytics-header {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 28px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--nfa-gold);
}
.nfa-analytics-title h2 {
    font-family: var(--ff-display);
    font-size: 1.7rem;
    color: var(--nfa-navy);
    margin: 0 0 4px;
}
.nfa-analytics-subtitle { font-size: .9rem; color: var(--nfa-muted); margin: 0; }

.nfa-streak-banner {
    display: flex;
    gap: 20px;
    align-items: center;
    background: var(--nfa-navy);
    border-radius: 8px;
    padding: 14px 24px;
}
.nfa-streak-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}
.nfa-streak-flame { font-size: 1.4rem; }
.nfa-streak-num {
    font-family: var(--ff-mono);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--nfa-gold);
    line-height: 1;
}
.nfa-streak-label {
    font-family: var(--ff-mono);
    font-size: .6rem;
    text-transform: uppercase;
    letter-spacing: .08em;
    color: #aaa;
}
.nfa-streak-current .nfa-streak-num { color: #FFD700; }

/* ── KPI row ────────────────────────────────────────────────────────────── */
.nfa-kpi-row {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 14px;
    margin-bottom: 24px;
}
.nfa-kpi-card {
    background: #fff;
    border: 1.5px solid var(--nfa-border);
    border-radius: 6px;
    padding: 18px 14px;
    text-align: center;
    transition: box-shadow .2s;
}
.nfa-kpi-card:hover { box-shadow: 0 4px 16px rgba(0,0,0,.08); }
.nfa-kpi-card.nfa-kpi-warn { border-color: #FFB300; background: #FFF8E1; }
.nfa-kpi-num {
    font-family: var(--ff-mono);
    font-size: 1.9rem;
    font-weight: 700;
    color: var(--nfa-navy);
    line-height: 1;
    margin-bottom: 5px;
}
.nfa-kpi-warn .nfa-kpi-num { color: #E65100; }
.nfa-kpi-label {
    font-family: var(--ff-mono);
    font-size: .62rem;
    text-transform: uppercase;
    letter-spacing: .07em;
    color: var(--nfa-muted);
}

/* ── Analytics grid + panels ────────────────────────────────────────────── */
.nfa-analytics-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 40px;
}
.nfa-analytics-panel {
    background: #fff;
    border: 1.5px solid var(--nfa-border);
    border-radius: 8px;
    padding: 20px 22px;
}
.nfa-panel-wide   { grid-column: 1 / -1; }
.nfa-panel-focus  { border-left: 4px solid var(--nfa-rust); }
.nfa-panel-atrisk { border-left: 4px solid #FFB300; }
.nfa-panel-feed   { grid-column: 1 / -1; }
.nfa-panel-students { grid-column: 1 / -1; }

.nfa-panel-head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: 16px;
    border-bottom: 1px solid #f0f0f0;
    padding-bottom: 10px;
}
.nfa-panel-head h3 {
    font-family: var(--ff-display);
    font-size: 1rem;
    color: var(--nfa-navy);
    margin: 0;
}
.nfa-panel-sub {
    font-family: var(--ff-mono);
    font-size: .62rem;
    color: var(--nfa-muted);
    text-transform: uppercase;
    letter-spacing: .06em;
}

/* ── Chart loading placeholder ──────────────────────────────────────────── */
.nfa-chart-loading {
    text-align: center;
    padding: 40px;
    color: var(--nfa-muted);
    font-size: .85rem;
    font-family: var(--ff-mono);
    animation: nfaPulse 1.5s ease-in-out infinite;
}
@keyframes nfaPulse { 0%,100%{opacity:.5} 50%{opacity:1} }

/* ── Timeline chart (activity heatmap) ──────────────────────────────────── */
.nfa-timeline-chart {
    display: flex;
    flex-wrap: wrap;
    gap: 3px;
    margin-bottom: 10px;
}
.nfa-timeline-day {
    width: 12px;
    height: 12px;
    border-radius: 2px;
    background: #e0e0e0;
    cursor: pointer;
    transition: transform .15s;
    position: relative;
}
.nfa-timeline-day:hover { transform: scale(1.4); z-index: 2; }
.nfa-timeline-day[data-level="1"] { background: #C8E6C9; }
.nfa-timeline-day[data-level="2"] { background: #81C784; }
.nfa-timeline-day[data-level="3"] { background: #388E3C; }
.nfa-timeline-day[data-level="4"] { background: #1B5E20; }
.nfa-timeline-legend {
    display: flex;
    gap: 16px;
    font-size: .72rem;
    font-family: var(--ff-mono);
    color: var(--nfa-muted);
}
.nfa-legend-dot::before {
    content: '';
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 2px;
    margin-right: 4px;
    vertical-align: middle;
}
.nfa-legend-check::before { background: var(--nfa-green); }
.nfa-legend-prove::before { background: var(--nfa-navy); }
.nfa-legend-badge::before { background: var(--nfa-gold); }

/* ── Stage progression chart ────────────────────────────────────────────── */
.nfa-stage-bars { display: flex; flex-direction: column; gap: 8px; }
.nfa-stage-row {
    display: grid;
    grid-template-columns: 36px 1fr 48px;
    align-items: center;
    gap: 10px;
}
.nfa-stage-label { font-family: var(--ff-mono); font-size: .7rem; font-weight: 700; color: var(--nfa-navy); }
.nfa-stage-bar-wrap { height: 20px; background: #e0e0e0; border-radius: 4px; overflow: hidden; }
.nfa-stage-bar-fill { height: 100%; border-radius: 4px; transition: width .6s ease; }
.nfa-stage-bar-fill.ts1 { background: #1565C0; }
.nfa-stage-bar-fill.ts2 { background: #1976D2; }
.nfa-stage-bar-fill.ts3 { background: #2E7D32; }
.nfa-stage-bar-fill.ts4 { background: #558B2F; }
.nfa-stage-bar-fill.ts5 { background: #6A1B9A; }
.nfa-stage-count { font-family: var(--ff-mono); font-size: .72rem; color: var(--nfa-muted); text-align: right; }

/* ── Domain grid ────────────────────────────────────────────────────────── */
.nfa-domain-cells {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 8px;
}
.nfa-domain-cell {
    padding: 10px 6px;
    border-radius: 5px;
    text-align: center;
    border: 1.5px solid var(--nfa-border);
    background: #fff;
    transition: border-color .2s;
}
.nfa-domain-cell.engaged { border-color: var(--nfa-green); background: #E8F5E9; }
.nfa-domain-cell.deep    { border-color: var(--nfa-navy);  background: #E8EAF6; }
.nfa-domain-cell-name { font-size: .62rem; font-family: var(--ff-mono); color: var(--nfa-muted); text-transform: uppercase; letter-spacing: .05em; }
.nfa-domain-cell-count { font-family: var(--ff-mono); font-size: 1rem; font-weight: 700; color: var(--nfa-navy); }
.engaged .nfa-domain-cell-count { color: var(--nfa-green); }
.deep    .nfa-domain-cell-count { color: var(--nfa-navy); }

/* ── Weakest domains ────────────────────────────────────────────────────── */
.nfa-weak-domain-row { margin-bottom: 16px; }
.nfa-weak-domain-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 4px;
    font-size: .85rem;
}
.nfa-domain-name { font-weight: 600; color: var(--nfa-navy); }
.nfa-domain-avg  { font-family: var(--ff-mono); font-size: .75rem; color: var(--nfa-rust); }
.nfa-weak-bar-wrap { height: 8px; background: #e0e0e0; border-radius: 4px; overflow: hidden; margin-bottom: 4px; }
.nfa-weak-bar { height: 100%; background: var(--nfa-rust); border-radius: 4px; transition: width .5s; }
.nfa-study-link { font-family: var(--ff-mono); font-size: .68rem; color: var(--nfa-navy); text-decoration: underline; }

/* ── Activity feed ──────────────────────────────────────────────────────── */
.nfa-activity-feed { display: flex; flex-direction: column; gap: 6px; max-height: 400px; overflow-y: auto; }
.nfa-feed-item {
    display: grid;
    grid-template-columns: 26px 1fr auto;
    align-items: center;
    gap: 10px;
    padding: 7px 10px;
    border-radius: 4px;
    background: #fafafa;
    border: 1px solid #f0f0f0;
    font-size: .82rem;
}
.nfa-feed-icon { font-size: 1rem; text-align: center; }
.nfa-feed-body { display: flex; flex-direction: column; gap: 1px; }
.nfa-feed-label { color: #1a1a1a; }
.nfa-feed-sub   { font-family: var(--ff-mono); font-size: .65rem; color: var(--nfa-navy); }
.nfa-feed-time  { font-family: var(--ff-mono); font-size: .62rem; color: var(--nfa-muted); white-space: nowrap; }
.nfa-feed-empty { text-align: center; padding: 30px; color: var(--nfa-muted); font-size: .85rem; }

/* ── Class analytics ─────────────────────────────────────────────────────── */
.nfa-class-selector {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    padding: 14px 18px;
    background: var(--nfa-cream);
    border: 1.5px solid var(--nfa-border);
    border-radius: 6px;
}
.nfa-select-label { font-family: var(--ff-mono); font-size: .7rem; text-transform: uppercase; letter-spacing: .07em; color: var(--nfa-muted); }
.nfa-class-select {
    padding: 6px 12px;
    border: 1.5px solid var(--nfa-border);
    border-radius: 4px;
    font-family: var(--ff-body);
    font-size: .9rem;
    flex: 1;
    max-width: 360px;
}
.nfa-btn-export {
    padding: 7px 16px;
    background: var(--nfa-navy);
    color: var(--nfa-gold);
    font-family: var(--ff-mono);
    font-size: .72rem;
    font-weight: 700;
    border-radius: 4px;
    text-decoration: none;
    margin-left: auto;
    transition: background .15s;
}
.nfa-btn-export:hover { background: #2a3870; }

/* ── Grade distribution bars ────────────────────────────────────────────── */
.nfa-grade-dist-bars { display: flex; flex-direction: column; gap: 10px; }
.nfa-grade-row {
    display: grid;
    grid-template-columns: 100px 1fr 50px;
    align-items: center;
    gap: 10px;
}
.nfa-grade-label { font-size: .8rem; font-weight: 600; color: var(--nfa-navy); }
.nfa-grade-bar-wrap { height: 24px; background: #e0e0e0; border-radius: 4px; overflow: hidden; }
.nfa-grade-bar { height: 100%; border-radius: 4px; transition: width .7s ease; }
.nfa-grade-bar.foundation  { background: #1565C0; }
.nfa-grade-bar.achievement { background: var(--nfa-green); }
.nfa-grade-bar.fluency     { background: #6A1B9A; }
.nfa-grade-pct { font-family: var(--ff-mono); font-size: .75rem; color: var(--nfa-muted); text-align: right; }

/* ── Engagement heatmap ──────────────────────────────────────────────────── */
.nfa-heatmap-cells {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}
.nfa-heatmap-cell {
    width: 36px;
    height: 36px;
    border-radius: 4px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-family: var(--ff-mono);
    font-size: .6rem;
    cursor: pointer;
    position: relative;
    transition: transform .15s;
}
.nfa-heatmap-cell:hover { transform: scale(1.2); z-index: 2; }
.nfa-heatmap-cell span { font-size: .55rem; opacity: .8; }

/* ── At-risk list ────────────────────────────────────────────────────────── */
.nfa-atrisk-list { display: flex; flex-direction: column; gap: 8px; }
.nfa-atrisk-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 9px 12px;
    border: 1.5px solid #FFB300;
    border-radius: 4px;
    background: #FFF8E1;
    font-size: .85rem;
}
.nfa-atrisk-name { flex: 1; font-weight: 600; color: var(--nfa-navy); }
.nfa-days-badge {
    font-family: var(--ff-mono);
    font-size: .65rem;
    background: #E65100;
    color: #fff;
    padding: 2px 8px;
    border-radius: 10px;
}
.nfa-atrisk-actions a {
    font-family: var(--ff-mono);
    font-size: .65rem;
    color: var(--nfa-navy);
    text-decoration: underline;
}

/* ── Report type badges ──────────────────────────────────────────────────── */
.nfa-report-type-badge {
    font-family: var(--ff-mono);
    font-size: .65rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 10px;
    text-transform: uppercase;
    letter-spacing: .05em;
}
.nfa-type-weekly_class  { background: #E3F2FD; color: #1565C0; }
.nfa-type-monthly_org   { background: #EDE7F6; color: #4527A0; }
.nfa-type-admin_digest  { background: #FFF3E0; color: #E65100; }

/* ── Admin two-col layout ────────────────────────────────────────────────── */
.nfa-two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 24px; }
.nfa-analytics-panel h3 { font-family: var(--ff-display); font-size: 1rem; color: var(--nfa-navy); margin-bottom: 4px; }

/* ── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
    .nfa-analytics-grid { grid-template-columns: 1fr; }
    .nfa-panel-wide, .nfa-panel-feed, .nfa-panel-students { grid-column: 1; }
    .nfa-two-col { grid-template-columns: 1fr; }
    .nfa-streak-banner { flex-wrap: wrap; gap: 12px; }
    .nfa-domain-cells { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
    .nfa-kpi-row { grid-template-columns: repeat(2, 1fr); }
    .nfa-analytics-header { flex-direction: column; }
}