/* Learning Path Visualizations and Progress Tracking */

.learning-path-container {
  background: linear-gradient(135deg, #f8f9fa, #e9ecef);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin: var(--spacing-xl) 0;
  position: relative;
  overflow: hidden;
}

.learning-path-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(90deg, 
    var(--md-primary-fg-color), 
    var(--md-accent-fg-color), 
    var(--success-color)
  );
}

/* Skill Tree Visualization */
.skill-tree {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
  position: relative;
  padding: var(--spacing-xl) 0;
}

.skill-level {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.skill-level-label {
  position: absolute;
  left: -100px;
  background: var(--md-primary-fg-color);
  color: white;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.5px;
}

.skill-nodes {
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
  justify-content: center;
}

.skill-node {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: white;
  border: 3px solid var(--md-default-fg-color--lighter);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--hover-transition);
  position: relative;
  box-shadow: var(--shadow-light);
}

.skill-node:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-medium);
}

.skill-node.completed {
  background: var(--success-color);
  color: white;
  border-color: var(--success-color);
}

.skill-node.in-progress {
  background: linear-gradient(135deg, white 50%, var(--md-primary-fg-color) 50%);
  border-color: var(--md-primary-fg-color);
}

.skill-node.locked {
  background: #f5f5f5;
  color: var(--md-default-fg-color--lighter);
  border-color: var(--md-default-fg-color--lightest);
  cursor: not-allowed;
}

.skill-node.locked::before {
  content: '🔒';
  position: absolute;
  top: -10px;
  right: -10px;
  background: var(--md-default-fg-color--lighter);
  color: white;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
}

.skill-node-icon {
  font-size: 24px;
  margin-bottom: var(--spacing-xs);
}

.skill-node-title {
  font-size: 0.8rem;
  font-weight: 600;
  text-align: center;
  line-height: 1.2;
}

.skill-node-progress {
  position: absolute;
  bottom: -5px;
  left: 50%;
  transform: translateX(-50%);
  width: 30px;
  height: 4px;
  background: var(--md-default-fg-color--lighter);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.skill-node-progress-fill {
  height: 100%;
  background: var(--success-color);
  transition: width 0.5s ease;
}

/* Skill connections */
.skill-connection {
  position: absolute;
  background: var(--md-primary-fg-color--light);
  z-index: -1;
}

.skill-connection.horizontal {
  height: 2px;
  top: 50%;
  transform: translateY(-50%);
}

.skill-connection.vertical {
  width: 2px;
  left: 50%;
  transform: translateX(-50%);
}

.skill-connection.completed {
  background: var(--success-color);
}

/* Learning Journey Map */
.learning-journey {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  position: relative;
  padding-left: var(--spacing-xl);
}

.learning-journey::before {
  content: '';
  position: absolute;
  left: 20px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--md-primary-fg-color--light);
}

.journey-milestone {
  position: relative;
  background: white;
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-light);
  border-left: 4px solid var(--md-primary-fg-color);
  margin-left: var(--spacing-lg);
}

.journey-milestone::before {
  content: '';
  position: absolute;
  left: -32px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  background: white;
  border: 3px solid var(--md-primary-fg-color);
  border-radius: 50%;
}

.journey-milestone.completed::before {
  background: var(--success-color);
  border-color: var(--success-color);
}

.journey-milestone.current::before {
  background: var(--warning-color);
  border-color: var(--warning-color);
  animation: pulse 2s infinite;
}

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

.milestone-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0;
  color: var(--md-primary-fg-color--dark);
}

.milestone-duration {
  font-size: 0.8rem;
  color: var(--md-default-fg-color--light);
  background: rgba(255, 153, 0, 0.1);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-xl);
}

.milestone-description {
  color: var(--md-default-fg-color--light);
  line-height: 1.5;
  margin-bottom: var(--spacing-md);
}

.milestone-tasks {
  list-style: none;
  padding: 0;
  margin: 0;
}

.milestone-tasks li {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs) 0;
  border-bottom: 1px solid var(--md-default-fg-color--lightest);
}

.milestone-tasks li:last-child {
  border-bottom: none;
}

.milestone-tasks li::before {
  content: '☐';
  color: var(--md-default-fg-color--lighter);
  font-size: 1.1em;
}

.milestone-tasks li.completed::before {
  content: '✅';
}

/* Progress Dashboard */
.progress-dashboard {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

.progress-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-light);
  border-top: 4px solid var(--md-primary-fg-color);
  position: relative;
  overflow: hidden;
}

.progress-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 60px;
  height: 60px;
  background: rgba(255, 153, 0, 0.1);
  border-radius: 0 0 0 60px;
}

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

.progress-card-title {
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--md-default-fg-color--light);
  margin: 0;
  letter-spacing: 0.5px;
}

.progress-card-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--md-primary-fg-color--dark);
  margin: 0;
}

.progress-card-change {
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-xs);
}

.progress-card-change.positive {
  color: var(--success-color);
}

.progress-card-change.negative {
  color: var(--error-color);
}

.progress-ring {
  width: 80px;
  height: 80px;
  position: relative;
  margin: 0 auto var(--spacing-md);
}

.progress-ring svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.progress-ring-background {
  fill: none;
  stroke: var(--md-default-fg-color--lightest);
  stroke-width: 8;
}

.progress-ring-progress {
  fill: none;
  stroke: var(--md-primary-fg-color);
  stroke-width: 8;
  stroke-linecap: round;
  transition: stroke-dashoffset 0.5s ease;
}

.progress-ring-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--md-primary-fg-color--dark);
}

/* Achievement Badges */
.achievement-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--spacing-md);
  margin: var(--spacing-lg) 0;
}

.achievement-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--spacing-lg);
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-light);
  transition: var(--hover-transition);
  cursor: pointer;
  border: 2px solid transparent;
}

.achievement-badge:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-medium);
  border-color: var(--md-primary-fg-color);
}

.achievement-badge.earned {
  background: linear-gradient(135deg, #ffd700, #ffed4a);
  border-color: #ffd700;
}

.achievement-badge.locked {
  opacity: 0.5;
  background: #f5f5f5;
  cursor: not-allowed;
}

.achievement-icon {
  font-size: 2rem;
  margin-bottom: var(--spacing-sm);
}

.achievement-title {
  font-size: 0.8rem;
  font-weight: 600;
  text-align: center;
  color: var(--md-default-fg-color--dark);
}

.achievement-description {
  font-size: 0.7rem;
  color: var(--md-default-fg-color--light);
  text-align: center;
  margin-top: var(--spacing-xs);
  line-height: 1.3;
}

/* Study Streaks */
.study-streak {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background: linear-gradient(135deg, #ff6b6b, #ffa500);
  color: white;
  border-radius: var(--radius-lg);
  margin: var(--spacing-md) 0;
  box-shadow: var(--shadow-light);
}

.streak-icon {
  font-size: 1.5rem;
}

.streak-text {
  flex: 1;
}

.streak-count {
  font-size: 1.2rem;
  font-weight: 700;
}

.streak-label {
  font-size: 0.8rem;
  opacity: 0.9;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
  .skill-tree {
    padding: var(--spacing-md) 0;
  }
  
  .skill-level-label {
    position: relative;
    left: 0;
    margin-bottom: var(--spacing-md);
    align-self: flex-start;
  }
  
  .skill-nodes {
    gap: var(--spacing-md);
  }
  
  .skill-node {
    width: 80px;
    height: 80px;
  }
  
  .skill-node-icon {
    font-size: 18px;
  }
  
  .skill-node-title {
    font-size: 0.7rem;
  }
  
  .learning-journey {
    padding-left: var(--spacing-md);
  }
  
  .journey-milestone {
    margin-left: var(--spacing-md);
    padding: var(--spacing-md);
  }
  
  .progress-dashboard {
    grid-template-columns: 1fr;
  }
  
  .achievement-grid {
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  }
  
  .achievement-badge {
    padding: var(--spacing-md);
  }
}

/* Dark mode adjustments */
[data-md-color-scheme="slate"] .learning-path-container {
  background: linear-gradient(135deg, #2d3748, #374151);
}

[data-md-color-scheme="slate"] .skill-node {
  background: var(--md-default-bg-color);
  color: var(--md-default-fg-color);
}

[data-md-color-scheme="slate"] .journey-milestone {
  background: var(--md-default-bg-color);
  color: var(--md-default-fg-color);
}

[data-md-color-scheme="slate"] .progress-card {
  background: var(--md-default-bg-color);
  color: var(--md-default-fg-color);
}

[data-md-color-scheme="slate"] .achievement-badge {
  background: var(--md-default-bg-color);
  color: var(--md-default-fg-color);
}

/* Animations */
@keyframes progressFill {
  from {
    stroke-dashoffset: 251.2;
  }
  to {
    stroke-dashoffset: calc(251.2 * (1 - var(--progress)));
  }
}

.progress-ring-progress {
  stroke-dasharray: 251.2;
  animation: progressFill 1s ease-out;
}

@keyframes achievementPop {
  0% {
    transform: scale(0.8);
  }
  50% {
    transform: scale(1.1);
  }
  100% {
    transform: scale(1);
  }
}

.achievement-badge.newly-earned {
  animation: achievementPop 0.5s ease-out;
}