.teacher-account-request-overlay {
  position: fixed;
  inset: 0;
  z-index: 100000;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  overflow-y: auto;
  padding: 2rem 1rem;
  background: rgba(15, 23, 42, 0.62);
  backdrop-filter: blur(3px);
}

.teacher-account-request-dialog {
  width: min(100%, 72rem);
  overflow: hidden;
  border: 1px solid #dbeafe;
  border-radius: 1.25rem;
  background: #fff;
  box-shadow: 0 28px 70px rgba(15, 23, 42, 0.28);
  color: #1e293b;
}

.teacher-account-request-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid #e2e8f0;
  background: linear-gradient(135deg, #eff6ff, #ffffff 70%);
}

.teacher-account-request-header h2 {
  margin: 0;
  color: #1e3a8a;
  font-size: 1.15rem;
  font-weight: 800;
}

.teacher-account-request-header p {
  margin: .35rem 0 0;
  color: #64748b;
  font-size: .8rem;
  line-height: 1.6;
}

.teacher-account-request-close {
  display: inline-flex;
  width: 2.25rem;
  height: 2.25rem;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  border: 0;
  border-radius: .75rem;
  background: #fff;
  color: #64748b;
  font-size: 1.4rem;
  cursor: pointer;
  box-shadow: 0 1px 3px rgba(15, 23, 42, .12);
}

.teacher-account-request-form {
  padding: 1.25rem 1.5rem 1.5rem;
}

.teacher-account-request-section {
  margin-bottom: 1rem;
  padding: 1rem;
  border: 1px solid #e2e8f0;
  border-radius: 1rem;
  background: #fff;
}

.teacher-account-request-section.profile {
  border-color: #fde68a;
  background: #fffbeb;
}

.teacher-account-request-section[hidden] {
  display: none;
}

.teacher-account-request-operation {
  border-color: #bfdbfe;
  background: #f8fbff;
}

.teacher-account-request-mode {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .65rem;
}

.teacher-account-request-mode button {
  min-height: 2.75rem;
  border: 1px solid #cbd5e1;
  border-radius: .8rem;
  background: #fff;
  color: #475569;
  font-size: .85rem;
  font-weight: 800;
  cursor: pointer;
}

.teacher-account-request-mode button.active[data-request-action="create"] {
  border-color: #2563eb;
  background: #eff6ff;
  color: #1d4ed8;
  box-shadow: 0 0 0 2px rgba(37, 99, 235, .08);
}

.teacher-account-request-mode button.active[data-request-action="delete"] {
  border-color: #dc2626;
  background: #fef2f2;
  color: #b91c1c;
  box-shadow: 0 0 0 2px rgba(220, 38, 38, .08);
}

.teacher-account-request-delete-section {
  border-color: #fecaca;
  background: #fffafa;
}

.teacher-account-request-section h3 {
  margin: 0 0 .8rem;
  color: #334155;
  font-size: .9rem;
  font-weight: 800;
}

.teacher-account-request-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: .8rem;
}

.teacher-account-request-field {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: .35rem;
  color: #475569;
  font-size: .75rem;
  font-weight: 700;
}

.teacher-account-request-field.wide {
  grid-column: span 2;
}

.teacher-account-request-field input,
.teacher-account-request-field select,
.teacher-account-request-field textarea {
  width: 100%;
  min-height: 2.65rem;
  border: 1px solid #cbd5e1;
  border-radius: .7rem;
  background: #fff;
  padding: .6rem .75rem;
  color: #0f172a;
  font-size: .85rem;
  font-weight: 500;
  outline: none;
}

.teacher-account-request-field textarea {
  min-height: 7rem;
  resize: vertical;
  line-height: 1.7;
}

.teacher-account-request-field input:focus,
.teacher-account-request-field select:focus,
.teacher-account-request-field textarea:focus {
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, .12);
}

.teacher-account-request-user-summary {
  display: flex;
  flex-wrap: wrap;
  gap: .55rem 1rem;
  margin-top: .85rem;
  padding: .8rem .9rem;
  border: 1px solid #fecaca;
  border-radius: .8rem;
  background: #fff;
  color: #64748b;
  font-size: .76rem;
}

.teacher-account-request-user-summary[hidden] {
  display: none;
}

.teacher-account-request-user-summary strong {
  width: 100%;
  color: #991b1b;
  font-size: .9rem;
}

.teacher-account-request-required {
  color: #dc2626;
}

.teacher-account-request-note {
  margin: .75rem 0 0;
  padding: .7rem .85rem;
  border-radius: .75rem;
  background: #eff6ff;
  color: #1e40af;
  font-size: .76rem;
  line-height: 1.7;
}

.teacher-account-request-note.danger {
  background: #fef2f2;
  color: #991b1b;
}

.teacher-account-request-message {
  display: none;
  margin-bottom: 1rem;
  padding: .8rem 1rem;
  border-radius: .75rem;
  font-size: .82rem;
  font-weight: 700;
  line-height: 1.6;
}

.teacher-account-request-message.error {
  display: block;
  border: 1px solid #fecaca;
  background: #fef2f2;
  color: #b91c1c;
}

.teacher-account-request-message.success {
  display: block;
  border: 1px solid #a7f3d0;
  background: #ecfdf5;
  color: #047857;
}

.teacher-account-request-actions {
  display: flex;
  justify-content: flex-end;
  gap: .75rem;
  padding-top: .25rem;
}

.teacher-account-request-actions button {
  min-height: 2.65rem;
  border-radius: .75rem;
  padding: .65rem 1.15rem;
  font-size: .85rem;
  font-weight: 800;
  cursor: pointer;
}

.teacher-account-request-cancel {
  border: 1px solid #cbd5e1;
  background: #fff;
  color: #475569;
}

.teacher-account-request-submit {
  border: 1px solid #2563eb;
  background: #2563eb;
  color: #fff;
}

.teacher-account-request-submit:disabled {
  cursor: wait;
  opacity: .6;
}

@media (max-width: 900px) {
  .teacher-account-request-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 560px) {
  .teacher-account-request-overlay { padding: .5rem; }
  .teacher-account-request-dialog { border-radius: 1rem; }
  .teacher-account-request-header,
  .teacher-account-request-form { padding: 1rem; }
  .teacher-account-request-grid { grid-template-columns: 1fr; }
  .teacher-account-request-mode { grid-template-columns: 1fr; }
  .teacher-account-request-field.wide { grid-column: auto; }
  .teacher-account-request-actions { flex-direction: column-reverse; }
  .teacher-account-request-actions button { width: 100%; }
}