/* Assign Assignment Modal Styles */

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.assign-assignment-modal {
  background: white;
  border-radius: 12px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
  max-width: 600px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 24px 16px;
  border-bottom: 1px solid #e5e7eb;
}

.modal-header h2 {
  margin: 0;
  font-size: 24px;
  font-weight: 600;
  color: #1f2937;
}

.close-button {
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: #6b7280;
  padding: 4px;
  border-radius: 4px;
  transition: color 0.2s;
}

.close-button:hover {
  color: #374151;
}

.modal-body {
  padding: 24px;
}

.assignment-context {
  margin: 0 0 24px;
  color: #6b7280;
  font-size: 14px;
  line-height: 1.5;
}

.assignment-context strong {
  color: #1f2937;
  font-weight: 600;
}

.assign-form {
  display: grid;
  gap: 24px;
}

.form-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-section label {
  font-weight: 500;
  color: #374151;
  font-size: 14px;
}

.form-select {
  padding: 12px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  font-size: 14px;
  background-color: white;
  cursor: pointer;
  transition: border-color 0.2s;
}

.form-select:focus {
  outline: none;
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.student-count {
  font-size: 12px;
  font-weight: 600;
  color: #6b7280;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 4px;
}

.students-list-container {
  margin-top: 16px;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  overflow: hidden;
}

.students-list {
  max-height: 200px;
  overflow-y: auto;
}

.student-item {
  display: flex;
  align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid #f3f4f6;
  transition: background-color 0.2s;
}

.student-item:last-child {
  border-bottom: none;
}

.student-item:hover {
  background-color: #f9fafb;
}

.student-checkbox {
  margin-right: 12px;
  width: 16px;
  height: 16px;
  cursor: pointer;
}

.student-item label {
  cursor: pointer;
  font-size: 14px;
  color: #374151;
  flex: 1;
}

/* Date Input Styles */
.date-input {
  padding: 12px;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  font-size: 14px;
  background-color: white;
  transition: all 0.2s ease;
  font-family: 'Quicksand', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: #374151;
  width: 100%;
}

.date-input:focus {
  outline: none;
  border-color: #2BB673;
  box-shadow: 0 0 0 3px rgba(43, 182, 115, 0.1);
}

.date-input:hover {
  border-color: #D1D5DB;
}

/* Modal Footer */
.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  padding: 16px 24px 24px;
  border-top: 1px solid #e5e7eb;
}

.btn {
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
}

.btn-secondary {
  background-color: white;
  color: #374151;
  border: 1px solid #d1d5db;
}

.btn-secondary:hover {
  background-color: #f9fafb;
  border-color: #9ca3af;
}

.btn-primary {
  background: #2BB673;
  color: white;
}

.btn-primary:hover {
  background: #249c62;
}

.btn-primary:disabled {
  background-color: #9ca3af;
  cursor: not-allowed;
}

/* Responsive Design */
@media (max-width: 640px) {
  .assign-assignment-modal {
    width: 95%;
    margin: 20px;
  }
  
  .modal-header,
  .modal-body,
  .modal-footer {
    padding: 16px;
  }
  
  .assign-form {
    gap: 16px;
  }
  
  .date-picker {
    padding: 12px;
  }
}