/* inst_teacher.css — Teacher surfaces (Dashboard / Classroom / Student profile)
 * for the Institutions product (P1 "teacher-surface" slice). Layers over
 * style.css + appshell.css; all colour/shape comes from the shared tokens
 * (--accent, --ink, --surface, --ready-green, --border, --shadow-*) so light/
 * dark re-ink for free. Defines the reusable .rbar / .roster / .tt-row / .gb
 * matrix vocabulary the handoff names (absent from style.css today) plus the
 * teacher-specific layout. Scoped under #lysia-root so nothing leaks pre-port. */

/* Gate: the Teaching tab is hidden until inst_teacher.js detects a teacher /
 * institution org context (mirrors .owner-gated). */
.tab.teacher-gated,
.drawer-tab.teacher-gated { display: none !important; }

#lysia-root .it-eyebrow {
  font: 600 11px/1 "JetBrains Mono", monospace;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-subtle);
}

/* ---- stat tiles → editorial statline (2026-07-02 refinement) --------------
 * Was a 4-up grid of identical grey tiles — read as a default dashboard and
 * orphan-wrapped (3+1) at laptop widths. Now one hairline-banded row: big
 * Newsreader numerals over mono labels, hairline dividers between stats.
 * (Losing variant kept in shots/variants/ — see handoff README.) */
#lysia-root .it-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin: 24px 0 30px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
#lysia-root .it-stat {
  flex: 1 1 130px;
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 18px 22px 15px 0;
  background: none;
  border: none;
  border-radius: 0;
  box-shadow: none;
}
#lysia-root .it-stat + .it-stat { border-left: 1px solid var(--border); padding-left: 22px; }
#lysia-root .it-stat-num {
  font: 500 34px/1 "Newsreader", serif;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}
#lysia-root .it-stat-label {
  font: 600 10px/1.2 "JetBrains Mono", monospace;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-subtle);
}
#lysia-root .it-stat-foot { font: 400 12px/1.3 "Inter", sans-serif; color: var(--ink-muted); }

/* ---- readiness bar ------------------------------------------------------- */
#lysia-root .rbar {
  position: relative;
  height: 7px;
  border-radius: 999px;
  background: var(--bg-deep);
  overflow: hidden;
  flex: 1;
  min-width: 60px;
}
#lysia-root .rbar > span {
  position: absolute;
  inset: 0;
  border-radius: 999px;
  background: var(--ready-green);
  transition: transform .5s var(--ease, ease);
}
#lysia-root .rbar.is-mid > span { background: var(--slate); }
#lysia-root .rbar.is-low > span { background: var(--accent); }
#lysia-root .rbar.is-unknown > span { background: var(--border-strong); }

/* ---- dashboard classroom cards ------------------------------------------ */
#lysia-root .it-class-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 18px;
}
#lysia-root .it-class-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  width: 100%;
  text-align: left;
  padding: 22px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow-1);
  cursor: pointer;
  transition: transform .25s var(--ease, ease), box-shadow .25s var(--ease, ease);
}
#lysia-root .it-class-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-2); }
#lysia-root .it-class-card:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
#lysia-root .it-class-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
#lysia-root .it-class-name { font: 500 18px/1.2 "Newsreader", serif; color: var(--ink); }
#lysia-root .it-class-code { font-family: "JetBrains Mono", monospace; letter-spacing: .1em; }
#lysia-root .it-class-meta { display: flex; gap: 14px; font: 400 13px/1 "Inter", sans-serif; color: var(--ink-muted); }
#lysia-root .it-class-ready { display: flex; flex-direction: column; gap: 6px; }
#lysia-root .it-class-ready-label,
#lysia-root .it-mastery-pct,
#lysia-root .it-roster-pct { font: 600 12px/1 "JetBrains Mono", monospace; color: var(--ink-muted); }
#lysia-root .it-class-foot { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
#lysia-root .it-class-final { font: 400 12px/1 "Inter", sans-serif; color: var(--ink-subtle); }

/* ---- join code card (accent ring + faux QR) ----------------------------- */
#lysia-root .it-join {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 24px;
  border: 1px solid var(--accent);
  border-radius: 20px;
  background: var(--accent-soft);
  margin-bottom: 22px;
}
#lysia-root .it-qr {
  display: grid;
  grid-template-columns: repeat(11, 1fr);
  gap: 2px;
  width: 132px;
  height: 132px;
  padding: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  flex: 0 0 auto;
}
#lysia-root .it-qr i { display: block; border-radius: 1px; background: transparent; }
#lysia-root .it-qr i.on { background: var(--ink); }
#lysia-root .it-join-body { display: flex; flex-direction: column; gap: 8px; min-width: 0; }
#lysia-root .it-join-code {
  font: 600 34px/1 "JetBrains Mono", monospace;
  letter-spacing: .18em;
  color: var(--ink);
}
#lysia-root .it-join-url {
  font: 400 13px/1.3 "Inter", sans-serif;
  color: var(--accent);
  word-break: break-all;
}
#lysia-root .it-join-actions { display: flex; gap: 10px; margin-top: 6px; }

/* ---- staff strip --------------------------------------------------------- */
#lysia-root .it-staff { display: flex; flex-direction: column; gap: 10px; margin-bottom: 22px; }
#lysia-root .it-staff-chips { display: flex; flex-wrap: wrap; gap: 12px; }
#lysia-root .it-staff-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px 6px 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
}
#lysia-root .it-staff-name { font: 500 13px/1 "Inter", sans-serif; color: var(--ink); }

/* ---- avatars ------------------------------------------------------------- */
#lysia-root .it-avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 999px;
  background: var(--em);
  color: var(--bg);
  font: 600 11px/1 "JetBrains Mono", monospace;
  flex: 0 0 auto;
}
#lysia-root .it-avatar-lg { width: 44px; height: 44px; font-size: 15px; }
#lysia-root .it-profile-id { display: flex; align-items: center; gap: 14px; }

/* ---- sections ------------------------------------------------------------ */
#lysia-root .it-section { margin: 26px 0; }
#lysia-root .it-section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}
#lysia-root .it-section h2 { font: 500 1.25rem/1.2 "Newsreader", serif; color: var(--ink); margin: 0; }

/* ---- roster / generic grid table ----------------------------------------- */
#lysia-root .roster { display: flex; flex-direction: column; border: 1px solid var(--border); border-radius: 14px; overflow: hidden; background: var(--surface); }
#lysia-root .tt-row {
  display: grid;
  grid-template-columns: 2fr 1.4fr .7fr .9fr;
  align-items: center;
  gap: 14px;
  padding: 12px 18px;
  border-top: 1px solid var(--border);
  font: 400 14px/1.3 "Inter", sans-serif;
  color: var(--ink);
}
#lysia-root .tt-row:first-child { border-top: none; }
#lysia-root .tt-head {
  background: var(--bg-deep);
  font: 600 10px/1 "JetBrains Mono", monospace;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-subtle);
}
#lysia-root .it-roster-row { cursor: pointer; transition: background .15s var(--ease, ease); }
#lysia-root .it-roster-row:hover { background: var(--accent-soft); }
#lysia-root .it-roster-row:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }
#lysia-root .it-roster-name { display: flex; align-items: center; gap: 10px; }
#lysia-root .tt-row > span:nth-child(2) { display: flex; align-items: center; gap: 8px; }

/* ---- practice-activity matrix (read-only; NOT a gradebook) --------------- */
#lysia-root .it-matrix-scroll { overflow-x: auto; border: 1px solid var(--border); border-radius: 14px; background: var(--surface); }
#lysia-root .gb { display: inline-grid; min-width: 100%; }
#lysia-root .gb-row {
  display: grid;
  grid-template-columns: minmax(160px, 1.6fr) repeat(var(--gb-cols, 8), minmax(72px, 1fr)) 72px;
  align-items: stretch;
  border-top: 1px solid var(--border);
}
#lysia-root .gb-row:first-child { border-top: none; }
#lysia-root .gb-row { background: var(--surface); }
#lysia-root .gb-head {
  background: var(--bg-deep);
  font: 600 10px/1.2 "JetBrains Mono", monospace;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-subtle);
}
#lysia-root .gb-name {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  font: 400 14px/1.3 "Inter", sans-serif;
  color: var(--ink);
  position: sticky;
  left: 0;
  background: inherit;
  border-right: 1px solid var(--border);
}
#lysia-root .gb-head .gb-name { background: var(--bg-deep); }
#lysia-root .gb-cell {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px 8px;
  font: 600 12px/1 "Inter", sans-serif;
  text-align: center;
  border-left: 1px solid var(--border);
  color: var(--ink-muted);
}
#lysia-root .gb-head .gb-cell { color: var(--ink-subtle); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
#lysia-root .gb-sum { font-family: "JetBrains Mono", monospace; color: var(--ink); }
/* Heat for completion — secondary to the always-present text label (D45). */
#lysia-root .gb-cell.gb-hi { background: color-mix(in oklab, var(--ready-green) 22%, transparent); color: var(--ink); }
#lysia-root .gb-cell.gb-mid { background: color-mix(in oklab, var(--slate) 20%, transparent); color: var(--ink); }
#lysia-root .gb-cell.gb-lo { background: transparent; color: var(--ink-subtle); }
#lysia-root .it-matrix-row { cursor: pointer; }
#lysia-root .it-matrix-row:hover .gb-name { background: var(--accent-soft); }
#lysia-root .it-matrix-row:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }

/* ---- mastery rows -------------------------------------------------------- */
#lysia-root .it-mastery { display: flex; flex-direction: column; gap: 12px; }
#lysia-root .it-mastery-row {
  display: grid;
  grid-template-columns: minmax(120px, 1.4fr) 2fr auto;
  align-items: center;
  gap: 14px;
}
#lysia-root .it-mastery-topic { font: 400 14px/1.3 "Inter", sans-serif; color: var(--ink); }

/* ---- empty / loading / error + back link --------------------------------- */
#lysia-root .it-state {
  padding: 18px 0;
  font: 400 14px/1.5 "Inter", sans-serif;
  color: var(--ink-muted);
}
#lysia-root .it-state-error { color: var(--accent); }
#lysia-root .it-empty { display: flex; flex-direction: column; gap: 6px; padding: 28px; text-align: center; }
#lysia-root .it-empty-title { font: 500 18px/1.2 "Newsreader", serif; color: var(--ink); }
#lysia-root .it-empty-sub { font: 400 14px/1.4 "Inter", sans-serif; color: var(--ink-muted); }
#lysia-root .it-back {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  background: none;
  border: none;
  padding: 0 0 6px;
  cursor: pointer;
  font: 600 12px/1 "JetBrains Mono", monospace;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-subtle);
}
#lysia-root .it-back:hover { color: var(--accent); }

@media (max-width: 720px) {
  #lysia-root .it-join { flex-direction: column; align-items: flex-start; }
  #lysia-root .tt-row { grid-template-columns: 1.6fr 1fr .6fr; }
  #lysia-root .tt-row > span:last-child { display: none; }
}