/* ============ TEACHER DASHBOARD ============ */
.teacher-body { background: var(--cream); }
.teacher-main { padding: 40px 0 80px; min-height: 70vh; }

.teacher-panel {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 48px 40px;
  text-align: center;
  max-width: 640px;
  margin: 40px auto;
}
.teacher-panel h1 {
  font-family: var(--font-head);
  color: var(--brand-navy);
  margin: 0 0 12px;
}
.teacher-panel .muted { color: var(--muted); }
.teacher-panel code {
  font-family: var(--font-mono);
  background: var(--cream);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.92em;
}
.loading-spinner {
  width: 36px; height: 36px;
  border: 3px solid rgba(64, 196, 116, 0.2);
  border-top-color: var(--brand-green);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
  margin: 0 auto 16px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Roster */
.roster-section { max-width: 1200px; margin: 0 auto; }
.roster-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}
.roster-head h1 {
  font-family: var(--font-head);
  font-size: 2rem;
  color: var(--brand-navy);
  margin: 4px 0 6px;
}
.roster-head .eyebrow {
  font-family: var(--font-head);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--brand-green);
}
.roster-head .muted { color: var(--muted); font-size: 0.95rem; margin: 0; }
.roster-actions { display: flex; gap: 10px; }

/* Stat cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 28px;
}
.stat-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.stat-card .stat-label {
  font-family: var(--font-head);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}
.stat-card strong {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.75rem;
  color: var(--brand-navy);
  line-height: 1;
}

/* Roster table */
.roster-table-wrap {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.roster-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}
.roster-table thead {
  background: var(--brand-navy);
  color: var(--white);
}
.roster-table th {
  font-family: var(--font-head);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-align: left;
  padding: 14px 18px;
  white-space: nowrap;
}
.roster-table tbody tr {
  border-top: 1px solid var(--line);
  cursor: pointer;
  transition: background 0.12s;
}
.roster-table tbody tr:hover { background: rgba(64, 196, 116, 0.06); }
.roster-table td {
  padding: 14px 18px;
  vertical-align: middle;
}
.roster-table td.num {
  font-family: var(--font-mono);
  font-weight: 500;
}
.roster-table td.student {
  font-weight: 600;
  color: var(--brand-navy);
}
.track-pill {
  display: inline-block;
  font-family: var(--font-head);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 3px 10px;
  border-radius: 999px;
  white-space: nowrap;
}
.track-pill.ma { background: rgba(42, 113, 137, 0.12); color: var(--brand-navy); }
.track-pill.bc { background: rgba(64, 196, 116, 0.15); color: var(--brand-green-dark); }

.progress-bar {
  background: var(--line);
  height: 6px;
  border-radius: 3px;
  overflow: hidden;
  width: 80px;
  margin-top: 4px;
}
.progress-bar-fill {
  height: 100%;
  background: var(--brand-green);
  transition: width 0.4s;
}
.progress-cell { min-width: 90px; }
.progress-text { font-family: var(--font-mono); font-size: 0.82rem; color: var(--muted); }

.empty-state { padding: 60px 20px; text-align: center; color: var(--muted); }

/* Detail drawer */
.detail-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(15, 36, 48, 0.55);
  z-index: 200;
  padding: 40px 20px;
  overflow-y: auto;
}
.detail-overlay.active { display: block; }
.detail-drawer {
  background: var(--white);
  border-radius: var(--radius-xl);
  max-width: 900px;
  margin: 0 auto;
  padding: 36px 40px;
  position: relative;
  min-height: 300px;
}
.detail-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  padding-bottom: 20px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--line);
}
.detail-header h2 {
  font-family: var(--font-head);
  color: var(--brand-navy);
  font-size: 1.6rem;
  margin: 0 0 6px;
}
.detail-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 28px;
}
.detail-stat {
  background: var(--cream);
  border-radius: 8px;
  padding: 12px 14px;
}
.detail-stat span {
  display: block;
  font-family: var(--font-head);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 4px;
}
.detail-stat strong {
  font-family: var(--font-head);
  font-size: 1.25rem;
  color: var(--brand-navy);
}
.detail-section-title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--brand-green);
  margin: 20px 0 10px;
}
.attempts-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.attempts-table th, .attempts-table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--line);
}
.attempts-table th {
  font-family: var(--font-head);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}
.attempts-table .num { font-family: var(--font-mono); }
.stars-inline { color: var(--gold); letter-spacing: 1px; }
.stars-inline .empty { color: var(--line-dark); }

@media (max-width: 820px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .detail-stats { grid-template-columns: repeat(2, 1fr); }
  .roster-table { font-size: 0.85rem; }
  .roster-table th, .roster-table td { padding: 10px 12px; }
  .detail-drawer { padding: 28px 20px; }
}
@media (max-width: 560px) {
  .roster-table-wrap { overflow-x: auto; }
  .roster-table { min-width: 720px; }
}