.levels-container {
  display: flex;
  flex-direction: column;
  gap: 32px;
  margin-top: 32px;
}

.level-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
  position: relative;
}

.level-card.locked {
  opacity: 0.6;
}

.level-header {
  margin-bottom: 24px;
}

.level-badge {
  display: inline-block;
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
}

.level-badge.level-1 {
  background: rgba(74, 222, 128, 0.2);
  color: #4ade80;
  border: 1px solid rgba(74, 222, 128, 0.3);
}

.level-badge.level-2 {
  background: rgba(68, 197, 245, 0.2);
  color: #44c5f5;
  border: 1px solid rgba(68, 197, 245, 0.3);
}

.level-badge.level-3 {
  background: rgba(143, 125, 243, 0.2);
  color: #8f7df3;
  border: 1px solid rgba(143, 125, 243, 0.3);
}

.level-badge.level-4 {
  background: rgba(251, 191, 36, 0.2);
  color: #fbbf24;
  border: 1px solid rgba(251, 191, 36, 0.3);
}

.level-badge.level-5 {
  background: rgba(239, 68, 68, 0.2);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.level-header h2 {
  margin: 0 0 8px;
  font-size: 1.8rem;
}

.level-description {
  color: var(--muted);
  margin: 0;
  line-height: 1.6;
}

.level-progress {
  margin-bottom: 24px;
}

.progress-bar {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 8px;
}

.progress-fill {
  height: 100%;
  background: var(--accent-2);
  transition: width 0.3s ease;
}

.progress-text {
  color: var(--muted);
  font-size: 0.9rem;
}

.modules-list {
  margin-bottom: 24px;
}

.module-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 8px;
  margin-bottom: 8px;
  transition: background 0.2s ease;
}

.module-item:hover {
  background: rgba(255, 255, 255, 0.06);
}

.module-item.completed {
  opacity: 0.7;
}

.module-checkbox {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.module-checkbox.completed {
  background: var(--success);
  border-color: var(--success);
}

.module-checkbox.completed::after {
  content: '✓';
  color: var(--bg);
  font-size: 14px;
  font-weight: bold;
}

.module-info {
  flex: 1;
}

.module-title {
  margin: 0 0 4px;
  font-size: 1rem;
  font-weight: 600;
}

.module-description {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.level-actions {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.lock-message {
  color: var(--muted);
  font-size: 0.9rem;
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.stats-panel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin: 32px 0;
}

.stat-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  text-align: center;
}

.stat-label {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent-2);
  margin-bottom: 4px;
}

.stat-subtext {
  color: var(--muted);
  font-size: 0.85rem;
}

.levels-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.level-preview-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.level-preview-card:hover {
  border-color: var(--accent-2);
  transform: translateY(-2px);
}

.level-preview-card h3 {
  margin: 0 0 8px;
  font-size: 1.2rem;
}

.level-preview-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.link-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  text-decoration: none;
  color: inherit;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 12px;
}

.link-card:hover {
  border-color: var(--accent-2);
  transform: translateY(-2px);
}

.link-icon {
  font-size: 2.5rem;
}

.link-card h3 {
  margin: 0;
  font-size: 1.1rem;
  color: var(--accent-2);
}

.link-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.core-skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 24px;
}

.skill-category {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
}

.skill-category h3 {
  margin: 0 0 16px;
  font-size: 1.2rem;
  color: var(--accent);
}

.skill-category ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.skill-category li {
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}

.skill-category li:last-child {
  border-bottom: none;
}

@media (max-width: 640px) {
  .level-card {
    padding: 24px;
  }

  .level-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
  }

  .core-skills-grid {
    grid-template-columns: 1fr;
  }
}