/* Modern CSS Architecture - Main Entry Point */

/* 1. Design Tokens - Design system foundation */
@import url('./tokens.css');

/* 2. Base Styles - Reset, typography, global styles */
@import url('./base.css');

/* 3. Layout - Grid, container, sections */
@import url('./layout.css');

/* 4. Components - Reusable UI components */
@import url('./components/navigation.css');
@import url('./components/buttons.css');
@import url('./components/cards.css');
@import url('./components/progress.css');
@import url('./components/copy-button.css');

/* 5. Utilities - Helper classes and animations */

/* Animations */
@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Animation Classes */
.animate-slide-up {
  animation: slideInUp var(--duration-slow) var(--ease-expo);
}

.animate-fade-up {
  animation: fadeInUp var(--duration-normal) var(--ease-out);
}

.animate-fade-in {
  animation: fadeIn var(--duration-normal) var(--ease-out);
}

/* Staggered Animations */
.animate-stagger > *:nth-child(1) {
  animation-delay: 0ms;
}
.animate-stagger > *:nth-child(2) {
  animation-delay: 100ms;
}
.animate-stagger > *:nth-child(3) {
  animation-delay: 200ms;
}
.animate-stagger > *:nth-child(4) {
  animation-delay: 300ms;
}
.animate-stagger > *:nth-child(5) {
  animation-delay: 400ms;
}

/* Code Blocks */
.code-block {
  position: relative;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-out);
}

.code-block:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.code-header {
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-primary);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.code-block pre {
  margin: 0;
  padding: var(--space-4);
  background: none;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  overflow-x: auto;
}

body.light-mode .code-block {
  background-color: var(--bg-tertiary);
  border-color: var(--border-primary);
}

body.light-mode .code-header {
  background-color: var(--bg-secondary);
  border-bottom-color: var(--border-primary);
}

/* Step Content */
.lab-step {
  padding-top: var(--space-6);
}

.step-content {
  padding: var(--space-4);
  display: none; /* Hidden by default */
  overflow-x: auto;
  max-width: 100%;
}

.step-content:first-child {
  display: block; /* Show first step by default */
}

.step-context {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  margin: var(--space-4) 0;
}

.context-item {
  display: flex;
  flex-direction: column;
}

.context-label {
  font-size: var(--text-xs);
  color: var(--accent-primary);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-1);
}

.context-content {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

body.light-mode .step-context {
  background-color: var(--bg-surface);
  border-color: var(--border-primary);
}

/* Step Instructions */
.step-instructions {
  margin: var(--space-4) 0;
}

.step-instructions h5 {
  color: var(--text-primary);
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  margin-bottom: var(--space-3);
}

.step-instructions ol {
  padding-left: var(--space-4);
  margin: 0;
}

.step-instructions li {
  color: var(--text-secondary);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-2);
}

/* Learning Objectives */
.learning-objectives {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-left: 4px solid var(--accent-secondary);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  margin: var(--space-6) 0;
}

body.light-mode .learning-objectives {
  background-color: var(--bg-secondary);
  border-color: var(--border-primary);
}

.learning-objectives h5 {
  color: var(--accent-secondary);
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.learning-objectives h5::before {
  content: '🎯';
  font-size: var(--text-lg);
}

.learning-objectives ol {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: objective-counter;
}

.learning-objectives li {
  position: relative;
  padding-left: var(--space-8);
  margin-bottom: var(--space-2);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
  counter-increment: objective-counter;
}

.learning-objectives li::before {
  content: counter(objective-counter);
  position: absolute;
  left: 0;
  top: 0;
  background: var(--accent-secondary);
  color: var(--color-white);
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
}

/* Prerequisites Section */
.intro-text {
  text-align: center;
  color: var(--text-secondary);
  font-size: var(--text-lg);
  margin-bottom: var(--space-8);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.prerequisites-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
  margin: var(--space-8) 0;
}

.prereq-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  transition: all var(--duration-normal) var(--ease-out);
}

.prereq-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-secondary);
}

body.light-mode .prereq-item {
  background: var(--bg-surface);
  border-color: var(--border-primary);
}

body.light-mode .prereq-item:hover {
  border-color: var(--border-secondary);
  box-shadow: var(--shadow-md);
}

.prereq-icon {
  font-size: var(--text-2xl);
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  border: 1px solid var(--border-primary);
}

body.light-mode .prereq-icon {
  background: var(--bg-secondary);
  border-color: var(--border-primary);
}

.prereq-content h4 {
  color: var(--text-primary);
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  margin-bottom: var(--space-2);
  line-height: var(--leading-tight);
}

.prereq-content p {
  color: var(--text-secondary);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  margin: 0;
}

.prereq-content a {
  color: var(--accent-primary);
  text-decoration: none;
  font-weight: var(--weight-medium);
  transition: color var(--duration-fast) var(--ease-out);
}

.prereq-content a:hover {
  color: var(--accent-secondary);
  text-decoration: underline;
}

.prereq-content code {
  background: var(--bg-tertiary);
  color: var(--accent-primary);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  border: 1px solid var(--border-primary);
}

body.light-mode .prereq-content code {
  background: var(--bg-secondary);
  border-color: var(--border-primary);
}

.ready-check {
  text-align: center;
  margin-top: var(--space-12);
  padding: var(--space-6);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}

.ready-check::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
}

body.light-mode .ready-check {
  background: var(--bg-surface);
  border-color: var(--border-primary);
}

.ready-check p {
  color: var(--text-primary);
  font-size: var(--text-lg);
  font-weight: var(--weight-medium);
  margin: 0;
}

.ready-check strong {
  color: var(--accent-primary);
  font-weight: var(--weight-semibold);
}

/* MCP Fundamentals Section */
.fundamentals-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-6);
  margin: var(--space-8) 0;
  align-items: stretch;
}

.fundamentals-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  position: relative;
  transition: all var(--duration-normal) var(--ease-out);
  height: 100%;
}

.fundamentals-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-secondary);
}

.fundamentals-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

body.light-mode .fundamentals-card {
  background: var(--bg-surface);
  border-color: var(--border-primary);
}

body.light-mode .fundamentals-card:hover {
  border-color: var(--border-secondary);
  box-shadow: var(--shadow-md);
}

.fundamentals-card h3 {
  color: var(--text-primary);
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  margin: 0 0 var(--space-4) 0;
  line-height: var(--leading-tight);
}

.fundamentals-card h4 {
  color: var(--text-primary);
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  margin: 0 0 var(--space-3) 0;
  line-height: var(--leading-tight);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.fundamentals-card h4::before {
  content: '⚙️';
  font-size: var(--text-lg);
}

.fundamentals-card:nth-child(2) h4::before {
  content: '🔧';
}

.fundamentals-card:nth-child(3) h4::before {
  content: '🚀';
}

.fundamentals-card p {
  color: var(--text-secondary);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  margin: 0 0 var(--space-4) 0;
}

.fundamentals-card p:last-child {
  margin-bottom: 0;
}

.fundamentals-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.fundamentals-card li {
  color: var(--text-secondary);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  padding-left: var(--space-6);
  position: relative;
  display: flex;
  align-items: flex-start;
}

.fundamentals-card li::before {
  content: '→';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent-primary);
  font-weight: var(--weight-semibold);
  font-size: var(--text-lg);
}

.fundamentals-card strong {
  color: var(--text-primary);
  font-weight: var(--weight-semibold);
}

/* Concept Blocks */
.concept-block {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-left: 4px solid var(--accent-primary);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  margin: var(--space-6) 0;
}

body.light-mode .concept-block {
  background-color: var(--bg-surface);
  border-color: var(--border-primary);
}

.concept-block h5 {
  color: var(--text-primary);
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  margin-bottom: var(--space-3);
}

.concept-block p {
  color: var(--text-secondary);
  margin-bottom: var(--space-3);
  line-height: var(--leading-relaxed);
}

.concept-block ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.concept-block li {
  position: relative;
  padding-left: var(--space-4);
  margin-bottom: var(--space-2);
  color: var(--text-secondary);
}

.concept-block li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent-primary);
  font-weight: var(--weight-semibold);
}

/* Step Output */
.step-output {
  margin-top: var(--space-4);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

body.light-mode .step-output {
  background-color: var(--bg-secondary);
  border-color: var(--border-primary);
}

.output-label {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: var(--weight-semibold);
  margin-bottom: var(--space-2);
  display: block;
}

.output-content code {
  color: var(--brand-green);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}

/* Print Styles */
@media print {
  .navbar,
  .theme-toggle,
  .progress-container,
  .btn {
    display: none !important;
  }

  .lab-content {
    box-shadow: none !important;
    border: 1px solid #ccc !important;
  }

  body {
    background: white !important;
    color: black !important;
  }
}

/* Performance Optimizations - Removed will-change to prevent flashing */
.lab-content,
.resource-card,
.overview-card {
  /* will-change removed to prevent flashing issues */
  backface-visibility: hidden;
  transform: translateZ(0);
}

/* Fundamentals responsive design */
@media (max-width: 1024px) {
  .fundamentals-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-5);
  }
}

@media (max-width: 768px) {
  .fundamentals-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .fundamentals-card {
    padding: var(--space-6);
  }

  .fundamentals-card h3 {
    font-size: var(--text-lg);
  }

  .fundamentals-card h4 {
    font-size: var(--text-base);
  }
}

/* Prerequisites responsive design */
@media (max-width: 768px) {
  .prerequisites-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .prereq-item {
    padding: var(--space-4);
  }

  .prereq-icon {
    width: 40px;
    height: 40px;
    font-size: var(--text-xl);
  }

  .ready-check {
    margin-top: var(--space-8);
    padding: var(--space-4);
  }
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}