/* ==========================================================================
   Teacher Analytics v2 — evidence-first control center.
   Scoped under .aios-analytics2. Consumes the shared AIOS tokens so it stays
   theme-aware (light/dark) and accent-aware automatically. The user accent is
   reserved for the primary trend line + active controls; success / warning /
   danger / neutral are independent semantic colours.
   ========================================================================== */

/* Cascade contract: this component stylesheet fills the aios.components layer
   (see public/aios-layers.css). The whole file is wrapped so nothing here is
   unlayered author CSS, which would outrank every layer. */
@layer aios.components {

.aios-analytics2 {
  /* Consume the theme-flipping --aios-* family (defined on <html> for both
     light and dark) so surfaces invert correctly. --panel/--panel-strong are
     scoped deeper in the app and are empty here, so they are NOT used. */
  --a2-accent: var(--aios-accent, #2f7cf6);
  --a2-accent-strong: var(--aios-accent-strong, #1f63d6);
  --a2-ink: var(--aios-text, var(--ink, #0f172a));
  --a2-muted: var(--aios-text-muted, var(--muted, #64708a));
  --a2-surface: var(--aios-surface, #ffffff);
  --a2-page: var(--aios-bg, #f4f5f8);
  --a2-surface-2: color-mix(in srgb, var(--a2-ink) 5%, var(--a2-surface));
  --a2-line: var(--aios-border, var(--line, rgba(148, 163, 184, 0.28)));
  /* Prefer the --aios-* semantic family: it flips with data-theme (light
     #1a8f5a/#a15c00/#c0362c, dark #3ecf8e/#ffb454/#ff6b6b) exactly like the
     surfaces do. The global --success/--danger/--warning are hardcoded to DARK
     values at :root (styles.css "dark glass" block) regardless of theme, so
     using them first would paint bright green/red on white cards in light mode
     (fails contrast). --aios-* is never undefined, so the fallbacks below are
     only belt-and-braces. */
  --a2-success: var(--aios-success, var(--success, #1a8f5a));
  --a2-warning: var(--aios-warning, var(--warning, #a15c00));
  --a2-danger: var(--aios-danger, var(--danger, #c0362c));
  --a2-neutral: var(--a2-muted);
  --a2-radius: 18px;
  --a2-radius-sm: 12px;
  --a2-gap: 18px;

  display: flex;
  flex-direction: column;
  gap: var(--a2-gap);
  color: var(--a2-ink);
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

.aios-analytics2 * {
  box-sizing: border-box;
}

/* ---- Shared surfaces ---------------------------------------------------- */

.aios-analytics2 .a2-card {
  background: var(--a2-surface);
  border: 1px solid var(--a2-line);
  border-radius: var(--a2-radius);
  padding: 20px;
}

.aios-analytics2 .a2-muted {
  color: var(--a2-muted);
  font-size: 13px;
}

.aios-analytics2 .a2-eyebrow {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--a2-accent);
  font-weight: 600;
}

.aios-analytics2 h2 {
  font-size: 30px;
  line-height: 1.1;
  margin: 4px 0 6px;
  letter-spacing: -0.02em;
}

.aios-analytics2 h3 {
  font-size: 18px;
  margin: 0;
  letter-spacing: -0.01em;
}

.aios-analytics2 .a2-card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.aios-analytics2 .a2-card-head p {
  margin: 4px 0 0;
}

/* ---- Header + sticky filter bar ---------------------------------------- */

.aios-analytics2 .a2-header {
  position: sticky;
  top: 0;
  z-index: var(--z-raised, 1);
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  border: 1px solid var(--a2-line);
  border-radius: var(--a2-radius);
  background: var(--a2-surface);
}

.aios-analytics2 .a2-header-titles p {
  margin: 0;
  color: var(--a2-muted);
  max-width: 48ch;
  font-size: 14px;
}

.aios-analytics2 .a2-filters {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 10px;
}

.aios-analytics2 .a2-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 12px;
  color: var(--a2-muted);
}

.aios-analytics2 .a2-field select {
  appearance: none;
  border: 1px solid var(--a2-line);
  background: var(--a2-surface);
  color: var(--a2-ink);
  border-radius: var(--a2-radius-sm);
  padding: 9px 30px 9px 12px;
  font-size: 13px;
  font-weight: 500;
  min-width: 150px;
  min-height: 44px;
  cursor: pointer;
  background-image: linear-gradient(45deg, transparent 50%, var(--a2-muted) 50%), linear-gradient(135deg, var(--a2-muted) 50%, transparent 50%);
  background-position: calc(100% - 16px) 55%, calc(100% - 11px) 55%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
}

.aios-analytics2 .a2-field select:focus-visible {
  outline: 2px solid var(--a2-accent);
  outline-offset: 1px;
}

.aios-analytics2 .a2-seg-group {
  display: inline-flex;
  gap: 6px;
  padding: 0;
  border: 0;
  background: transparent;
}

.aios-analytics2 .a2-seg {
  border: none;
  background: transparent;
  color: var(--a2-muted);
  padding: 7px 12px;
  border-radius: 9px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  min-height: 34px;
  transition: background 160ms ease, color 160ms ease;
}

.aios-analytics2 .a2-seg.is-active {
  background: var(--a2-accent);
  color: #fff;
}

.aios-analytics2 .a2-ghost {
  border: 1px solid var(--a2-line);
  background: var(--a2-surface);
  color: var(--a2-ink);
  border-radius: var(--a2-radius-sm);
  padding: 9px 12px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  flex-shrink: 0;
  min-height: 40px;
  transition: border-color 160ms ease, background 160ms ease;
}

.aios-analytics2 .a2-ghost:hover {
  border-color: var(--a2-accent);
}

.aios-analytics2 .a2-ghost.is-active {
  border-color: var(--a2-accent);
  color: var(--a2-accent);
  background: color-mix(in srgb, var(--a2-accent) 10%, transparent);
}

/* ---- Insight strip ------------------------------------------------------ */

.aios-analytics2 .a2-insight-strip {
  border-left: 3px solid var(--a2-warning);
}

.aios-analytics2 .a2-insight-strip.a2-insight-clear {
  border-left-color: var(--a2-success);
}

.aios-analytics2 .a2-strip-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
}

.aios-analytics2 .a2-strip-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.aios-analytics2 .a2-strip-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--a2-radius-sm);
  background: var(--a2-surface-2);
  font-size: 14px;
  font-weight: 500;
}

.aios-analytics2 .a2-strip-text {
  flex: 1;
}

.aios-analytics2 .a2-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  flex: 0 0 auto;
  background: var(--a2-neutral);
}

.aios-analytics2 .a2-tone-warning .a2-dot { background: var(--a2-warning); }
.aios-analytics2 .a2-tone-danger .a2-dot { background: var(--a2-danger); }
.aios-analytics2 .a2-tone-success .a2-dot { background: var(--a2-success); }

.aios-analytics2 .a2-chip-action {
  border: 1px solid var(--a2-line);
  background: var(--a2-surface);
  color: var(--a2-ink);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  min-height: 34px;
}

.aios-analytics2 .a2-chip-action:hover {
  border-color: var(--a2-accent);
  color: var(--a2-accent);
}

/* ---- Metric cards ------------------------------------------------------- */

.aios-analytics2 .a2-metrics {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
}

.aios-analytics2 .a2-metric {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px;
  position: relative;
  overflow: hidden;
}

.aios-analytics2 .a2-metric::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--a2-neutral);
  opacity: 0.6;
}

.aios-analytics2 .a2-metric.a2-tone-accent::before { background: var(--a2-accent); }
.aios-analytics2 .a2-metric.a2-tone-success::before { background: var(--a2-success); }
.aios-analytics2 .a2-metric.a2-tone-warning::before { background: var(--a2-warning); }
.aios-analytics2 .a2-metric.a2-tone-danger::before { background: var(--a2-danger); }

.aios-analytics2 .a2-metric-label {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--a2-muted);
}

.aios-analytics2 .a2-metric-value {
  font-size: 32px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.aios-analytics2 .a2-metric-sub {
  font-size: 13px;
}

.aios-analytics2 .a2-metric-foot {
  margin-top: 6px;
  font-size: 12px;
  color: var(--a2-muted);
}

/* ---- Deltas + confidence ------------------------------------------------ */

/* Deltas and confidence render as flat, neutral text — the coloured highlight
   fill and the red/amber/green treatment were removed on request for a calm,
   uniform look. Direction still reads from the +/- sign and arrow glyph in the
   label text, so no colour is needed to convey meaning. */
.aios-analytics2 .a2-delta,
.aios-analytics2 .a2-skill-delta {
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--a2-text);
}

.aios-analytics2 .a2-delta-up,
.aios-analytics2 .a2-delta-down { color: var(--a2-text); }
.aios-analytics2 .a2-delta-flat { color: var(--a2-muted); }

.aios-analytics2 .a2-confidence {
  display: inline-block;
  font-size: 11.5px;
  font-weight: 600;
  padding: 3px 9px;
  border-radius: 999px;
  border: 1px solid var(--a2-line);
  color: var(--a2-muted);
}

.aios-analytics2 .a2-conf-high,
.aios-analytics2 .a2-conf-medium,
.aios-analytics2 .a2-conf-low { color: var(--a2-muted); }
.aios-analytics2 .a2-conf-none { color: var(--a2-muted); font-style: italic; }

/* ---- Main grid: trend + AIOS ------------------------------------------- */

.aios-analytics2 .a2-grid-main {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--a2-gap);
}

.aios-analytics2 .a2-trend-svg {
  width: 100%;
  height: 220px;
  display: block;
}

.aios-analytics2 .a2-grid {
  stroke: var(--a2-line);
  stroke-width: 0.4;
  stroke-dasharray: 1.5 1.5;
}

.aios-analytics2 .a2-line {
  fill: none;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}

.aios-analytics2 .a2-line-main { stroke: var(--a2-accent); }

.aios-analytics2 .a2-line-compare {
  stroke: var(--a2-muted);
  stroke-dasharray: 3 2;
  opacity: 0.7;
}

.aios-analytics2 .a2-node {
  fill: var(--a2-accent);
  stroke: var(--a2-surface);
  stroke-width: 0.6;
}

.aios-analytics2 .a2-node-low {
  fill: color-mix(in srgb, var(--a2-accent) 40%, var(--a2-surface));
}

.aios-analytics2 .a2-trend-summary {
  margin: 12px 0 0;
  font-size: 13px;
  color: var(--a2-muted);
  max-width: 70ch;
}

/* ---- AIOS insight ------------------------------------------------------- */

.aios-analytics2 .a2-aios {
  background: color-mix(in srgb, var(--a2-accent) 5%, var(--a2-surface));
  border-color: color-mix(in srgb, var(--a2-accent) 22%, var(--a2-line));
  display: flex;
  flex-direction: column;
}

.aios-analytics2 .a2-aios-list {
  list-style: none;
  margin: 0 0 12px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.aios-analytics2 .a2-aios-list li {
  font-size: 14px;
  line-height: 1.5;
  padding-left: 16px;
  position: relative;
}

.aios-analytics2 .a2-aios-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--a2-accent);
}

.aios-analytics2 .a2-aios-note {
  font-size: 12px;
  color: var(--a2-muted);
  margin: 0 0 14px;
}

.aios-analytics2 .a2-aios-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
}

/* ---- Buttons ------------------------------------------------------------ */

.aios-analytics2 .a2-btn {
  border: 1px solid var(--a2-line);
  background: var(--a2-surface);
  color: var(--a2-ink);
  border-radius: var(--a2-radius-sm);
  padding: 8px 13px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  min-height: 38px;
  transition: transform 120ms ease, border-color 160ms ease;
}

.aios-analytics2 .a2-btn:hover { border-color: var(--a2-accent); }
.aios-analytics2 .a2-btn:active { transform: translateY(1px); }

.aios-analytics2 .a2-btn-primary {
  background: var(--a2-accent);
  border-color: var(--a2-accent);
  color: #fff;
}

.aios-analytics2 .a2-btn-primary:hover {
  background: var(--a2-accent-strong);
  border-color: var(--a2-accent-strong);
}

/* ---- Skills heatmap ----------------------------------------------------- */

.aios-analytics2 .a2-skill-list,
.aios-analytics2 .a2-attn-list,
.aios-analytics2 .a2-assign-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.aios-analytics2 .a2-skill-row {
  display: grid;
  grid-template-columns: minmax(130px, 1.4fr) 2fr 56px 92px minmax(120px, 1fr);
  align-items: center;
  gap: 14px;
  padding: 12px 4px;
  border-top: 1px solid var(--a2-line);
  font-size: 13.5px;
}

.aios-analytics2 .a2-skill-row:first-child { border-top: none; }

.aios-analytics2 .a2-skill-name { font-weight: 600; }

.aios-analytics2 .a2-skill-bar {
  height: 8px;
  border-radius: 999px;
  background: var(--a2-surface-2);
  overflow: hidden;
  border: 1px solid var(--a2-line);
}

.aios-analytics2 .a2-skill-bar > span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--a2-neutral);
}

.aios-analytics2 .a2-skill-bar.a2-tone-success > span { background: var(--a2-success); }
.aios-analytics2 .a2-skill-bar.a2-tone-warning > span { background: var(--a2-warning); }
.aios-analytics2 .a2-skill-bar.a2-tone-danger > span { background: var(--a2-danger); }
.aios-analytics2 .a2-skill-bar.a2-tone-none > span { background: var(--a2-line); }

.aios-analytics2 .a2-skill-score {
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.aios-analytics2 .a2-skill-delta { font-size: 13px; font-weight: 600; text-align: right; }
.aios-analytics2 .a2-skill-conf { font-size: 12px; text-align: right; }

/* ---- Attention list ----------------------------------------------------- */

.aios-analytics2 .a2-attn-row {
  display: grid;
  grid-template-columns: minmax(160px, 1.1fr) 1.6fr minmax(150px, 0.7fr) minmax(220px, auto);
  align-items: center;
  gap: 16px;
  padding: 16px 4px;
  border-top: 1px solid var(--a2-line);
}

.aios-analytics2 .a2-attn-row:first-child { border-top: none; }

.aios-analytics2 .a2-attn-id {
  display: flex;
  align-items: center;
  gap: 12px;
}

.aios-analytics2 .a2-attn-id div {
  display: flex;
  flex-direction: column;
}

.aios-analytics2 .a2-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  font-size: 13px;
  font-weight: 700;
  color: var(--a2-accent);
  background: color-mix(in srgb, var(--a2-accent) 14%, transparent);
}

.aios-analytics2 .a2-attn-reasons {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 3px;
  font-size: 13px;
  color: var(--a2-ink);
}

.aios-analytics2 .a2-attn-reasons li {
  position: relative;
  padding-left: 14px;
}

.aios-analytics2 .a2-attn-reasons li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 7px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--a2-warning);
}

.aios-analytics2 .a2-attn-meta {
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: flex-start;
}

.aios-analytics2 .a2-attn-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  flex-wrap: wrap;
}

/* ---- Assignments -------------------------------------------------------- */

.aios-analytics2 .a2-assign-row {
  display: grid;
  grid-template-columns: minmax(200px, 2fr) minmax(160px, 1fr) 84px minmax(120px, auto);
  align-items: center;
  gap: 16px;
  padding: 14px 4px;
  border-top: 1px solid var(--a2-line);
}

.aios-analytics2 .a2-assign-row:first-child { border-top: none; }

.aios-analytics2 .a2-assign-id {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.aios-analytics2 .a2-late {
  color: var(--a2-muted);
  font-weight: 600;
}

.aios-analytics2 .a2-assign-rate {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.aios-analytics2 .a2-assign-avg {
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  text-align: right;
  display: flex;
  flex-direction: column;
}

.aios-analytics2 .a2-assign-avg small {
  font-size: 10.5px;
  font-weight: 500;
  color: var(--a2-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.aios-analytics2 .a2-assign-actions {
  display: flex;
  justify-content: flex-end;
}

/* ---- AI usage ----------------------------------------------------------- */

.aios-analytics2 .a2-usage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 12px;
}

.aios-analytics2 .a2-usage-cell {
  border: 1px solid var(--a2-line);
  border-radius: var(--a2-radius-sm);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.aios-analytics2 .a2-usage-cell strong {
  font-size: 26px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.aios-analytics2 .a2-usage-cell span {
  font-size: 12.5px;
  color: var(--a2-muted);
}

/* Usage-cell figures stay neutral (no red/amber text) per the flat look. */

/* ---- Empty states ------------------------------------------------------- */

.aios-analytics2 .a2-empty {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 24px;
  border: 1px dashed var(--a2-line);
  border-radius: var(--a2-radius-sm);
  background: var(--a2-surface-2);
  text-align: center;
  color: var(--a2-muted);
}

.aios-analytics2 .a2-empty strong {
  color: var(--a2-ink);
  font-size: 14px;
}

.aios-analytics2 .a2-empty span { font-size: 13px; }

/* ---- Responsive --------------------------------------------------------- */

@media (max-width: 1180px) {
  .aios-analytics2 .a2-metrics { grid-template-columns: repeat(3, 1fr); }
  .aios-analytics2 .a2-grid-main { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
  .aios-analytics2 .a2-header { position: static; flex-direction: column; align-items: stretch; }
  .aios-analytics2 .a2-filters { justify-content: flex-start; }
  .aios-analytics2 .a2-metrics { grid-template-columns: repeat(2, 1fr); }
  .aios-analytics2 .a2-skill-row {
    grid-template-columns: 1fr auto;
    grid-template-areas: "name score" "bar bar" "delta conf";
    row-gap: 8px;
  }
  .aios-analytics2 .a2-skill-name { grid-area: name; }
  .aios-analytics2 .a2-skill-score { grid-area: score; }
  .aios-analytics2 .a2-skill-bar { grid-area: bar; }
  .aios-analytics2 .a2-skill-delta { grid-area: delta; text-align: left; }
  .aios-analytics2 .a2-skill-conf { grid-area: conf; }
  .aios-analytics2 .a2-attn-row,
  .aios-analytics2 .a2-assign-row {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .aios-analytics2 .a2-attn-actions,
  .aios-analytics2 .a2-assign-actions { justify-content: flex-start; }
  .aios-analytics2 .a2-field select { min-width: 130px; }
}

@media (max-width: 520px) {
  .aios-analytics2 .a2-metrics { grid-template-columns: 1fr; }
  .aios-analytics2 h2 { font-size: 26px; }
}

/* ---- Reduced motion ----------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  .aios-analytics2 * {
    transition: none !important;
    animation: none !important;
  }
}

} /* end @layer aios.components */

/* The legacy form reset otherwise reduces these filters on desktop. */
@layer legacy {
  .aios-analytics2 .a2-field select {
    min-height: 44px;
  }
}
