#mainScreen {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-xl);
}


.project-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 60px var(--spacing-xl);
  color: var(--text-muted);
}

/* Project Card */
.project-card {
  background: var(--panel);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--spacing-lg);
}

.project-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: var(--spacing-xs);
}

.project-meta {
  font-size: 12px;
  color: var(--text-muted);
}

/* Section */
.section {
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-md);
  background: var(--bg);
  border-radius: var(--radius-md);
}

.section:last-child {
  margin-bottom: 0;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
}

.section-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
}

.section-content {
  font-size: 12px;
  color: var(--text);
}

/* Lecture Section */
.lecture-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
}

/* Exam List */
.exam-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.exam-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
  background: var(--card);
  border-radius: var(--radius-sm);
}

.exam-checkbox {
  flex-shrink: 0;
}

.exam-info {
  flex: 1;
  min-width: 0;
}

.exam-name {
  font-size: 12px;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 2px;
}

.exam-stats {
  font-size: 11px;
  color: var(--text-muted);
}

/* Action Bar */
.action-bar {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-sm);
}

/* Bottom Actions */
.bottom-actions {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.bottom-actions .btn {
  flex: 1;
}

.bottom-actions.three-buttons {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

/* User Profile */
.user-profile {
  margin-left: auto;
}

.user-profile-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background-color: var(--background-secondary);
  border: 1px solid var(--border-color);
  padding: 8px 12px;
  border-radius: var(--border-radius);
  cursor: pointer;
  color: var(--text-primary);
  font-weight: 500;
}

.user-profile-btn:hover {
  background-color: var(--background-tertiary);
}

.user-icon {
  font-size: 1.2em;
}

/* Tutorial Modal */
#cropTutorialOverlay .modal-content {
  max-width: 600px;
  background: #1a1e25;
  border-radius: 12px;
  padding: 25px;
  text-align: center;
}

#cropTutorialOverlay img {
  width: 100%;
  max-width: 400px;
  border-radius: 8px;
  margin-bottom: 15px;
}

#cropTutorialOverlay h2 {
  color: #6aa9ff;
  margin-bottom: 10px;
}

#cropTutorialOverlay .tutorial-glue-info {
  text-align: left;
  background: #2b3543;
  padding: 15px;
  border-radius: 8px;
  font-size: 13px;
  color: #e8eef5;
}

#cropTutorialOverlay .tutorial-glue-info p {
  margin: 0 0 10px 0;
}

#cropTutorialOverlay .tutorial-glue-info ol {
  margin: 0;
  padding-left: 20px;
  line-height: 1.6;
}

#cropTutorialOverlay #closeTutorialBtn {
  margin-top: 20px;
  background: #2a3d5e;
  color: #b7d7ff;
  padding: 10px 20px;
}