/* Creating Facebook Content for the AI, SI, and Agentic Era - Stylesheet */
:root {
  --bg-primary: #080c16;
  --bg-secondary: #0f172a;
  --bg-tertiary: #1e293b;
  --bg-card: #141e33;
  --bg-input: #090e1a;
  --border-color: #263554;
  --border-focus: #1877f2;

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent-fb-blue: #1877f2;
  --accent-fb-hover: #166fe5;
  --accent-meta-purple: #9333ea;
  --accent-amber: #f59e0b;
  --accent-gold: #fbbf24;
  --accent-indigo: #6366f1;
  --accent-green: #10b981;
  --accent-red: #ef4444;

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  --sidebar-width: 290px;
  --coach-width: 330px;
  --header-height: 64px;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* App Header */
.app-header {
  height: var(--header-height);
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 0 1.5rem;
  max-width: 1600px;
  margin: 0 auto;
}

.brand-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-badge {
  background: linear-gradient(135deg, var(--accent-fb-blue), var(--accent-meta-purple));
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.brand-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.header-btn {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 0.4rem 0.85rem;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.2s ease;
  text-decoration: none;
}

.header-btn:hover {
  background-color: var(--accent-fb-blue);
  border-color: var(--accent-fb-blue);
  color: #fff;
}

/* App Layout */
.app-container {
  display: flex;
  max-width: 1600px;
  margin: 0 auto;
  position: relative;
  min-height: calc(100vh - var(--header-height));
}

/* Sidebar Navigation */
.app-sidebar {
  width: var(--sidebar-width);
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  padding: 1.5rem 1rem;
  flex-shrink: 0;
  height: calc(100vh - var(--header-height));
  position: sticky;
  top: var(--header-height);
  overflow-y: auto;
}

.sidebar-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  padding-left: 0.5rem;
}

.stage-nav {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.stage-nav-item a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 0.75rem;
  border-radius: 6px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  transition: all 0.15s ease;
}

.stage-nav-item a:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.stage-nav-item a.active {
  background-color: rgba(24, 119, 242, 0.15);
  color: var(--accent-fb-blue);
  border-left: 3px solid var(--accent-fb-blue);
  font-weight: 600;
}

.nav-badge {
  font-size: 0.7rem;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  background-color: var(--bg-card);
  color: var(--text-muted);
}

/* Main Content Area */
.app-main {
  flex: 1;
  min-width: 0;
  padding: 2.5rem;
  max-width: 1050px;
}

/* Stage Section */
.stage-section {
  display: none;
  animation: fadeIn 0.25s ease-out forwards;
}

.stage-section.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.stage-header {
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.5rem;
}

.stage-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-fb-blue);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.5rem;
}

.stage-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.25;
  margin-bottom: 0.75rem;
}

.stage-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Cards & Modules */
.content-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card-title .icon {
  color: var(--accent-fb-blue);
}

/* Callout Boxes */
.callout {
  padding: 1.25rem;
  border-radius: 8px;
  margin-bottom: 1.5rem;
  border-left: 4px solid;
  background-color: var(--bg-card);
}

.callout-info {
  border-left-color: var(--accent-fb-blue);
  background-color: rgba(24, 119, 242, 0.08);
}

.callout-warning {
  border-left-color: var(--accent-amber);
  background-color: rgba(245, 158, 11, 0.08);
}

.callout-success {
  border-left-color: var(--accent-green);
  background-color: rgba(16, 185, 129, 0.08);
}

.callout-purple {
  border-left-color: var(--accent-meta-purple);
  background-color: rgba(147, 51, 234, 0.08);
}

.callout-title {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.callout-body {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* Tables */
.table-container {
  overflow-x: auto;
  margin-bottom: 1.5rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.data-table th {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  padding: 0.75rem 1rem;
  font-weight: 600;
  border-bottom: 1px solid var(--border-color);
}

.data-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table tr:hover td {
  background-color: rgba(255, 255, 255, 0.02);
}

/* Badges */
.badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}

.badge-known {
  background-color: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid #059669;
}

.badge-evidence {
  background-color: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
  border: 1px solid #d97706;
}

.badge-speculative {
  background-color: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border: 1px solid #dc2626;
}

.badge-blue {
  background-color: rgba(24, 119, 242, 0.15);
  color: #60a5fa;
  border: 1px solid var(--accent-fb-blue);
}

/* Code Cards & Command Blocks */
.code-card {
  background-color: #060913;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  margin-bottom: 1.5rem;
  overflow: hidden;
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--bg-tertiary);
  padding: 0.5rem 1rem;
  border-bottom: 1px solid var(--border-color);
}

.code-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.code-copy-btn {
  background-color: var(--bg-card);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.code-copy-btn:hover {
  background-color: var(--accent-fb-blue);
  color: #fff;
  border-color: var(--accent-fb-blue);
}

.code-body {
  padding: 1rem;
  overflow-x: auto;
}

.code-body pre {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: #e2e8f0;
  line-height: 1.5;
  white-space: pre;
}

/* Tab Systems */
.tabs-container {
  margin-bottom: 1.5rem;
}

.tabs-nav {
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1rem;
}

.tab-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.6rem 1rem;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.15s ease;
}

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

.tab-btn.active {
  color: var(--accent-fb-blue);
  border-bottom-color: var(--accent-fb-blue);
}

.tab-pane {
  display: none;
}

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

/* Interactive Checkpoint Box */
.checkpoint-box {
  background-color: rgba(24, 119, 242, 0.05);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.25rem;
  margin-top: 2rem;
  margin-bottom: 1.5rem;
}

.checkpoint-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent-fb-blue);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.checkpoint-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.checkpoint-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn-confirm {
  background-color: var(--accent-fb-blue);
  color: #fff;
  border: none;
  padding: 0.5rem 1.25rem;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.btn-confirm:hover {
  background-color: var(--accent-fb-hover);
}

.checkpoint-status {
  font-size: 0.85rem;
  color: var(--accent-green);
  font-weight: 600;
  display: none;
}

/* Interactive Calculator */
.calc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.slider-group {
  background-color: var(--bg-secondary);
  padding: 1rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.slider-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.slider-label span:last-child {
  color: var(--accent-fb-blue);
  font-family: var(--font-mono);
}

.calc-slider {
  width: 100%;
  accent-color: var(--accent-fb-blue);
}

.score-display-card {
  background: linear-gradient(135deg, var(--bg-card), var(--bg-tertiary));
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 1.5rem;
  text-align: center;
  margin-bottom: 1.5rem;
}

.score-value {
  font-size: 3.5rem;
  font-weight: 900;
  color: var(--accent-fb-blue);
  line-height: 1;
  margin: 0.5rem 0;
}

.score-tier {
  display: inline-block;
  padding: 0.35rem 1rem;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.tier-low {
  background-color: rgba(239, 68, 68, 0.2);
  color: #f87171;
  border: 1px solid #ef4444;
}

.tier-medium {
  background-color: rgba(245, 158, 11, 0.2);
  color: #fbbf24;
  border: 1px solid #f59e0b;
}

.tier-high {
  background-color: rgba(16, 185, 129, 0.2);
  color: #34d399;
  border: 1px solid #10b981;
}

.tier-omni {
  background-color: rgba(147, 51, 234, 0.2);
  color: #c084fc;
  border: 1px solid #9333ea;
}

.score-feedback {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
  max-width: 600px;
  margin: 0 auto;
}

/* Orbit AI Coach Drawer */
.app-coach {
  width: var(--coach-width);
  background-color: var(--bg-secondary);
  border-left: 1px solid var(--border-color);
  padding: 1.5rem 1rem;
  flex-shrink: 0;
  height: calc(100vh - var(--header-height));
  position: sticky;
  top: var(--header-height);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.coach-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.coach-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-fb-blue), var(--accent-meta-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.9rem;
  color: #fff;
}

.coach-info h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}

.coach-info p {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.coach-messages {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  overflow-y: auto;
  margin-bottom: 1rem;
  padding-right: 0.25rem;
}

.coach-msg {
  padding: 0.85rem;
  border-radius: 8px;
  font-size: 0.85rem;
  line-height: 1.5;
}

.coach-msg-ai {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.coach-msg-ai strong {
  color: var(--text-primary);
}

.coach-chips {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 0.75rem;
}

.coach-chip {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.4rem 0.6rem;
  border-radius: 6px;
  font-size: 0.75rem;
  text-align: left;
  cursor: pointer;
  transition: all 0.15s ease;
}

.coach-chip:hover {
  background-color: var(--accent-fb-blue);
  color: #fff;
  border-color: var(--accent-fb-blue);
}

.coach-input-box {
  display: flex;
  gap: 0.4rem;
}

.coach-input {
  flex: 1;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 0.5rem 0.75rem;
  font-size: 0.85rem;
  color: var(--text-primary);
  outline: none;
}

.coach-input:focus {
  border-color: var(--accent-fb-blue);
}

.coach-send-btn {
  background-color: var(--accent-fb-blue);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 0 0.85rem;
  font-size: 0.85rem;
  cursor: pointer;
}

/* Stage Navigation Buttons */
.stage-footer-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

.nav-stage-btn {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 0.6rem 1.25rem;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.2s ease;
}

.nav-stage-btn:hover {
  background-color: var(--accent-fb-blue);
  border-color: var(--accent-fb-blue);
}

/* Mobile & Responsive Adjustments */
@media (max-width: 1200px) {
  .app-coach {
    display: none;
  }
}

@media (max-width: 900px) {
  .app-sidebar {
    display: none;
  }
  .app-main {
    padding: 1.5rem 1rem;
  }
  .calc-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .stage-title {
    font-size: 1.5rem;
  }
  .header-inner {
    padding: 0 0.5rem;
  }
  .brand-title {
    font-size: 0.85rem;
  }
  .brand-badge {
    font-size: 0.65rem;
    padding: 0.2rem 0.4rem;
  }
  .header-actions .badge {
    display: none;
  }
  .header-btn {
    padding: 0.3rem 0.6rem;
    font-size: 0.75rem;
  }
  .stage-footer-nav {
    flex-direction: column;
    gap: 0.75rem;
  }
  .nav-stage-btn {
    justify-content: center;
    width: 100%;
  }
}


/* Checkpoint Green Checkmark on Menu Items (Right-aligned) */
.nav-item a,
.step-nav-item,
.step-nav-btn,
.nav-item-btn,
.nav-link {
  display: flex !important;
  align-items: center !important;
  justify-content: flex-start !important;
  position: relative !important;
}

.nav-item.completed a::after,
.step-nav-item.completed::after,
.step-nav-btn.completed::after,
.nav-item-btn.completed::after,
.nav-link.completed::after {
  content: " \2713" !important;
  margin-left: auto !important;
  color: #22c55e !important;
  font-weight: 800 !important;
  font-size: 1.15rem !important;
  line-height: 1 !important;
  display: inline-flex !important;
  align-items: center !important;
}