.teacher-shell {
  min-height: 100vh;
  padding: 24px;
}

.teacher-header,
.teacher-toolbar,
.teacher-status,
.teacher-metrics,
.teacher-panel {
  max-width: 1600px;
  margin: 0 auto;
  border: 1px solid rgba(217, 225, 234, 0.9);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.teacher-header {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: flex-start;
  padding: 22px;
}

.teacher-header p {
  margin-bottom: 0;
  color: var(--muted);
}

.teacher-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.teacher-toolbar {
  display: grid;
  grid-template-columns: repeat(3, minmax(150px, 1fr)) minmax(240px, 1.4fr) auto auto;
  gap: 14px;
  align-items: end;
  margin-top: 18px;
  padding: 16px;
}

.teacher-status {
  margin-top: 18px;
  padding: 12px 16px;
}

.teacher-status p {
  margin: 0;
  color: var(--muted);
  font-weight: 700;
}

.teacher-status.error p {
  color: var(--bad);
}

.teacher-metrics {
  display: grid;
  grid-template-columns: repeat(8, minmax(112px, 1fr));
  gap: 1px;
  margin-top: 18px;
  overflow: hidden;
}

.teacher-metrics div {
  min-width: 0;
  padding: 16px;
  background: #fff;
}

.teacher-metrics span {
  display: block;
  font-size: 1.85rem;
  font-weight: 800;
}

.teacher-metrics p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
}

.teacher-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(320px, 0.85fr);
  gap: 18px;
  max-width: 1600px;
  margin: 18px auto 0;
}

.teacher-panel {
  min-width: 0;
  padding: 18px;
}

.teacher-panel[hidden] {
  display: none;
}

.teacher-panel-wide {
  min-width: 0;
}

.teacher-panel-heading {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 12px;
}

.teacher-panel-heading span {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
}

.teacher-panel-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
  align-items: center;
}

.teacher-list {
  display: grid;
  gap: 10px;
  min-width: 0;
}

.teacher-assignment-composer {
  display: grid;
  grid-template-columns: minmax(120px, 0.35fr) minmax(160px, 0.45fr) auto;
  gap: 12px;
  align-items: end;
  margin-bottom: 12px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(245, 248, 251, 0.8);
}

.teacher-card,
.teacher-row {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.teacher-card {
  display: grid;
  gap: 8px;
  padding: 12px;
}

.teacher-card-topline {
  display: flex;
  justify-content: space-between;
  gap: 10px;
}

.teacher-card-select {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  min-width: 0;
}

.teacher-card-select input {
  flex: 0 0 auto;
  margin-top: 2px;
}

.teacher-card-select strong {
  min-width: 0;
}

.teacher-card strong {
  overflow-wrap: anywhere;
}

.teacher-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
}

.teacher-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.teacher-tags span,
.teacher-pill {
  border-radius: 999px;
  padding: 4px 8px;
  color: var(--accent-strong);
  background: rgba(24, 127, 114, 0.1);
  font-size: 0.75rem;
  font-weight: 800;
}

.teacher-pill.warn {
  color: var(--warn);
  background: rgba(190, 91, 32, 0.1);
}

.teacher-pill.bad {
  color: var(--bad);
  background: rgba(180, 35, 24, 0.1);
}

.teacher-table {
  display: grid;
  gap: 8px;
  min-width: 0;
}

.teacher-row {
  display: grid;
  grid-template-columns: minmax(160px, 1.2fr) repeat(4, minmax(80px, 0.65fr));
  gap: 10px;
  align-items: center;
  padding: 10px 12px;
}

.teacher-row span {
  min-width: 0;
  overflow-wrap: anywhere;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 700;
}

.teacher-empty {
  margin: 0;
  padding: 14px;
  border: 1px dashed var(--line);
  border-radius: 8px;
  color: var(--muted);
  background: rgba(245, 248, 251, 0.8);
  font-weight: 700;
}

.teacher-heatmap {
  gap: 12px;
}

.teacher-heatmap-cells {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 8px;
}

.teacher-heatmap-cell {
  display: grid;
  gap: 3px;
  min-height: 86px;
  min-width: 0;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.teacher-heatmap-cell strong,
.teacher-heatmap-cell span,
.teacher-heatmap-cell small {
  min-width: 0;
  overflow-wrap: anywhere;
}

.teacher-heatmap-cell strong {
  font-size: 1.1rem;
}

.teacher-heatmap-cell span {
  color: var(--ink);
  font-size: 0.82rem;
  font-weight: 800;
}

.teacher-heatmap-cell small {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 800;
}

.teacher-heatmap-cell.strong {
  border-color: rgba(24, 127, 114, 0.32);
  background: rgba(24, 127, 114, 0.08);
}

.teacher-heatmap-cell.steady {
  border-color: rgba(190, 91, 32, 0.32);
  background: rgba(190, 91, 32, 0.08);
}

.teacher-heatmap-cell.needs {
  border-color: rgba(180, 35, 24, 0.28);
  background: rgba(180, 35, 24, 0.08);
}

@media (max-width: 1080px) {
  .teacher-toolbar,
  .teacher-grid,
  .teacher-assignment-composer {
    grid-template-columns: 1fr;
  }

  .teacher-metrics {
    grid-template-columns: repeat(2, minmax(120px, 1fr));
  }

  .teacher-row {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 720px) {
  .teacher-shell {
    padding: 14px;
  }

  .teacher-header {
    display: grid;
  }

  .teacher-metrics {
    grid-template-columns: 1fr;
  }
}