/* ============================================================================
   Session Showcase Styles
   Interactive HTML showcases for Elvtr course Session 1 materials
   ============================================================================ */

:root {
  /* Course Colors */
  --course-1-color: #6366f1; /* Purple - Game Dev */
  --course-2-color: #f97316; /* Orange - Orchestration */
  --course-3-color: #10b981; /* Green - Marketplace */

  /* Neutral Colors */
  --bg-dark: #0f172a;
  --bg-medium: #1e293b;
  --bg-light: #334155;
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;

  /* Code Colors */
  --code-bg: #1e293b;
  --code-border: #334155;
  --code-comment: #6b7280;
  --code-keyword: #8b5cf6;
  --code-string: #10b981;
  --code-function: #3b82f6;

  /* Interactive Colors */
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --info: #3b82f6;

  /* Layout */
  --sidebar-width: 280px;
  --header-height: 70px;
  --border-radius: 12px;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.4);
}

/* ============================================================================
   Base Styles
   ============================================================================ */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-medium) 100%);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  margin: 0;
  padding: 0;
}

/* ============================================================================
   Layout Structure
   ============================================================================ */

.showcase-container {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-medium);
  border-right: 1px solid var(--bg-light);
  position: fixed;
  height: 100vh;
  overflow-y: auto;
  z-index: 100;
  transition: transform 0.3s ease;
}

.sidebar-header {
  padding: 1.5rem;
  background: var(--bg-dark);
  border-bottom: 1px solid var(--bg-light);
  position: sticky;
  top: 0;
  z-index: 10;
}

.sidebar-header h2 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.course-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.course-1 .course-badge { background: var(--course-1-color); }
.course-2 .course-badge { background: var(--course-2-color); }
.course-3 .course-badge { background: var(--course-3-color); }

.nav-menu {
  list-style: none;
  padding: 1rem 0;
}

.nav-item {
  margin-bottom: 0.25rem;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1.5rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.2s ease;
  border-left: 3px solid transparent;
}

.nav-link:hover {
  background: var(--bg-light);
  color: var(--text-primary);
}

.nav-link.active {
  background: var(--bg-light);
  color: var(--text-primary);
}

.course-1 .nav-link.active { border-left-color: var(--course-1-color); }
.course-2 .nav-link.active { border-left-color: var(--course-2-color); }
.course-3 .nav-link.active { border-left-color: var(--course-3-color); }

.nav-icon {
  width: 20px;
  height: 20px;
  opacity: 0.7;
}

/* Progress Indicator */
.progress-section {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--bg-light);
}

.progress-label {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.progress-bar {
  height: 8px;
  background: var(--bg-light);
  border-radius: 10px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  transition: width 0.3s ease;
  border-radius: 10px;
}

.course-1 .progress-fill { background: var(--course-1-color); }
.course-2 .progress-fill { background: var(--course-2-color); }
.course-3 .progress-fill { background: var(--course-3-color); }

.progress-text {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* Main Content */
.main-content {
  margin-left: var(--sidebar-width) !important; /* Force sidebar spacing on desktop */
  margin-top: 0 !important; /* Force zero top margin */
  flex: 1;
  padding: 0 2rem 2rem 2rem !important; /* Force zero top padding */
  max-width: 1400px;
}

/* Back to Hub Button */
.btn-back-to-hub:hover {
  background: #475569 !important;
  border-color: #64748b !important;
  transform: translateX(-4px);
}

/* ============================================================================
   Header Styles
   ============================================================================ */

.page-header {
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 2px solid var(--bg-light);
}

.page-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.course-1 .page-title { color: var(--course-1-color); }
.course-2 .page-title { color: var(--course-2-color); }
.course-3 .page-title { color: var(--course-3-color); }

.page-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.meta-info {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.meta-item i {
  opacity: 0.7;
}

/* ============================================================================
   Tab Navigation
   ============================================================================ */

.tab-navigation {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 2rem;
  border-bottom: 2px solid var(--bg-light);
  overflow-x: auto;
  scrollbar-width: thin;
}

.tab-btn {
  padding: 1rem 1.5rem;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  border-bottom: 3px solid transparent;
  transition: all 0.2s ease;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.tab-btn:hover {
  color: var(--text-primary);
  background: var(--bg-light);
}

.tab-btn.active {
  color: var(--text-primary);
}

.course-1 .tab-btn.active { border-bottom-color: var(--course-1-color); }
.course-2 .tab-btn.active { border-bottom-color: var(--course-2-color); }
.course-3 .tab-btn.active { border-bottom-color: var(--course-3-color); }

.tab-content {
  display: none;
  animation: fadeIn 0.3s ease;
}

.tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============================================================================
   Card Components
   ============================================================================ */

.card {
  background: var(--bg-medium);
  border-radius: var(--border-radius);
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--bg-light);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--bg-light);
}

.card-title {
  font-size: 1.5rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.card-actions {
  display: flex;
  gap: 0.5rem;
}

.card-body {
  line-height: 1.8;
}

/* ============================================================================
   Code Display
   ============================================================================ */

.code-container {
  position: relative;
  margin: 1.5rem 0;
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-dark);
  padding: 0.75rem 1rem;
  border-radius: var(--border-radius) var(--border-radius) 0 0;
  border: 1px solid var(--code-border);
  border-bottom: none;
}

.code-label {
  font-family: 'Courier New', monospace;
  font-size: 0.875rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.language-badge {
  padding: 0.25rem 0.5rem;
  background: var(--bg-light);
  border-radius: 4px;
  font-size: 0.75rem;
  text-transform: uppercase;
  font-weight: 600;
}

.copy-button {
  padding: 0.5rem 1rem;
  background: var(--bg-light);
  border: 1px solid var(--code-border);
  border-radius: 6px;
  color: var(--text-secondary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.copy-button:hover {
  background: var(--bg-medium);
  color: var(--text-primary);
}

.copy-button.copied {
  background: var(--success);
  color: white;
}

pre {
  margin: 0;
  padding: 1.5rem;
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: 0 0 var(--border-radius) var(--border-radius);
  overflow-x: auto;
  font-family: 'Courier New', Consolas, Monaco, monospace;
  font-size: 0.875rem;
  line-height: 1.6;
}

code {
  font-family: 'Courier New', Consolas, Monaco, monospace;
}

/* Code Diff View */
.code-diff {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.5rem 0;
}

.diff-panel {
  position: relative;
}

.diff-label {
  position: absolute;
  top: 1rem;
  right: 1rem;
  padding: 0.25rem 0.75rem;
  background: rgba(0, 0, 0, 0.5);
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  z-index: 10;
}

.diff-starter { border-left: 3px solid var(--warning); }
.diff-solution { border-left: 3px solid var(--success); }

/* ============================================================================
   Interactive Quiz
   ============================================================================ */

.quiz-container {
  margin: 2rem 0;
}

.quiz-question {
  background: var(--bg-medium);
  padding: 2rem;
  margin-bottom: 2rem;
  border-radius: var(--border-radius);
  border-left: 4px solid transparent;
  transition: all 0.3s ease;
}

.quiz-question.correct {
  border-left-color: var(--success);
  background: rgba(16, 185, 129, 0.1);
}

.quiz-question.incorrect {
  border-left-color: var(--error);
  background: rgba(239, 68, 68, 0.1);
}

.question-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1rem;
}

.question-number {
  font-weight: 600;
  color: var(--text-muted);
}

.question-points {
  background: var(--bg-light);
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.875rem;
}

.question-text {
  font-size: 1.125rem;
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.quiz-option {
  padding: 1rem 1.25rem;
  background: var(--bg-dark);
  border: 2px solid var(--bg-light);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.quiz-option:hover {
  border-color: var(--bg-light);
  background: var(--bg-light);
}

.quiz-option input[type="radio"] {
  width: 20px;
  height: 20px;
  cursor: pointer;
}

.quiz-option.selected {
  background: var(--bg-light);
}

.quiz-option.correct {
  border-color: var(--success);
  background: rgba(16, 185, 129, 0.1);
}

.quiz-option.incorrect {
  border-color: var(--error);
  background: rgba(239, 68, 68, 0.1);
}

.quiz-feedback {
  margin-top: 1rem;
  padding: 1rem;
  border-radius: 8px;
  display: none;
}

.quiz-feedback.show {
  display: block;
}

.quiz-feedback.correct {
  background: rgba(16, 185, 129, 0.15);
  border-left: 4px solid var(--success);
}

.quiz-feedback.incorrect {
  background: rgba(239, 68, 68, 0.15);
  border-left: 4px solid var(--error);
}

.quiz-actions {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
}

.quiz-score {
  background: var(--bg-dark);
  padding: 1.5rem;
  border-radius: var(--border-radius);
  text-align: center;
  margin-top: 2rem;
}

.score-display {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.course-1 .score-display { color: var(--course-1-color); }
.course-2 .score-display { color: var(--course-2-color); }
.course-3 .score-display { color: var(--course-3-color); }

/* ============================================================================
   Buttons
   ============================================================================ */

.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
}

.btn-primary {
  background: var(--course-1-color);
  color: white;
}

.course-1 .btn-primary { background: var(--course-1-color); }
.course-2 .btn-primary { background: var(--course-2-color); }
.course-3 .btn-primary { background: var(--course-3-color); }

.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: var(--bg-light);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: var(--bg-medium);
}

.btn-success {
  background: var(--success);
  color: white;
}

.btn-icon {
  padding: 0.5rem;
  background: transparent;
  border: 1px solid var(--bg-light);
}

/* ============================================================================
   Accordion
   ============================================================================ */

.accordion {
  margin: 1.5rem 0;
}

.accordion-item {
  background: var(--bg-medium);
  border: 1px solid var(--bg-light);
  border-radius: var(--border-radius);
  margin-bottom: 0.5rem;
  overflow: hidden;
}

.accordion-header {
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background 0.2s ease;
}

.accordion-header:hover {
  background: var(--bg-light);
}

.accordion-title {
  font-size: 1.125rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.accordion-icon {
  transition: transform 0.3s ease;
}

.accordion-item.active .accordion-icon {
  transform: rotate(180deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.accordion-item.active .accordion-content {
  max-height: 2000px;
}

.accordion-body {
  padding: 1.5rem;
  border-top: 1px solid var(--bg-light);
}

/* ============================================================================
   Alerts & Notifications
   ============================================================================ */

.alert {
  padding: 1rem 1.25rem;
  border-radius: 8px;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.alert-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
}

.alert-info {
  background: rgba(59, 130, 246, 0.15);
  border-left: 4px solid var(--info);
  color: var(--text-primary);
}

.alert-success {
  background: rgba(16, 185, 129, 0.15);
  border-left: 4px solid var(--success);
  color: var(--text-primary);
}

.alert-warning {
  background: rgba(245, 158, 11, 0.15);
  border-left: 4px solid var(--warning);
  color: var(--text-primary);
}

.alert-error {
  background: rgba(239, 68, 68, 0.15);
  border-left: 4px solid var(--error);
  color: var(--text-primary);
}

/* ============================================================================
   Lists
   ============================================================================ */

.objectives-list {
  list-style: none;
  padding-left: 0;
}

.objectives-list li {
  padding: 0.75rem 0;
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  border-bottom: 1px solid var(--bg-light);
}

.objectives-list li:last-child {
  border-bottom: none;
}

.objectives-list li::before {
  content: "✓";
  color: var(--success);
  font-weight: bold;
  flex-shrink: 0;
}

.resource-list {
  list-style: none;
  padding-left: 0;
}

.resource-item {
  padding: 1rem;
  background: var(--bg-dark);
  border-radius: 8px;
  margin-bottom: 0.75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all 0.2s ease;
}

.resource-item:hover {
  background: var(--bg-light);
  transform: translateX(4px);
}

.resource-link {
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex: 1;
}

.resource-icon {
  width: 24px;
  height: 24px;
  opacity: 0.7;
}

/* ============================================================================
   Responsive Design
   ============================================================================ */

@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.mobile-open {
    transform: translateX(0);
  }

  .main-content {
    margin-left: 0;
  }

  .code-diff {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .main-content {
    padding: 1rem;
  }

  .page-title {
    font-size: 2rem;
  }

  .tab-navigation {
    flex-wrap: wrap;
  }

  .meta-info {
    flex-direction: column;
    gap: 0.5rem;
  }
}

/* ============================================================================
   Utility Classes
   ============================================================================ */

.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }

.hidden { display: none; }
.flex { display: flex; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }

/* ============================================================================
   Print Styles
   ============================================================================ */

@media print {
  .sidebar,
  .tab-navigation,
  .btn,
  .copy-button {
    display: none;
  }

  .main-content {
    margin-left: 0;
    max-width: 100%;
  }

  .tab-content {
    display: block !important;
  }

  .card {
    page-break-inside: avoid;
  }
}