/* Creating Instagram Content for the AI, SI, and Agentic Era - Stylesheet */
:root {
  --bg-primary: #070913;
  --bg-secondary: #0f1424;
  --bg-tertiary: #171f38;
  --bg-card: #131a30;
  --bg-input: #0a0e1c;
  --border-color: #242f4d;
  --border-focus: #e1306c;

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

  --accent-ig-gradient: linear-gradient(135deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
  --accent-ig-purple: #833ab4;
  --accent-ig-pink: #e1306c;
  --accent-ig-orange: #f56040;
  --accent-ig-yellow: #fcaa47;
  --accent-ig-blue: #4c68d7;

  --accent-cyan: #06b6d4;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  --accent-violet: #8b5cf6;

  --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: 1680px;
  margin: 0 auto;
}

.brand-group {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.logo-badge {
  background: var(--accent-ig-gradient);
  color: #ffffff;
  font-weight: 800;
  font-size: 0.78rem;
  padding: 0.35rem 0.65rem;
  border-radius: 6px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  box-shadow: 0 2px 10px rgba(225, 48, 108, 0.35);
}

.title-group h1 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
}

.title-group p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.progress-container {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.progress-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.progress-bar-bg {
  width: 140px;
  height: 8px;
  background-color: var(--bg-tertiary);
  border-radius: 999px;
  overflow: hidden;
}

.progress-bar-fill {
  width: 0%;
  height: 100%;
  background: var(--accent-ig-gradient);
  border-radius: 999px;
  transition: width 0.3s ease;
}

.progress-text {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-ig-pink);
  min-width: 38px;
}

/* Layout */
.main-layout {
  display: flex;
  max-width: 1680px;
  margin: 0 auto;
  min-height: calc(100vh - var(--header-height));
}

/* Sidebar */
.steps-sidebar {
  width: var(--sidebar-width);
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  padding: 1.25rem 0.75rem;
  flex-shrink: 0;
  height: calc(100vh - var(--header-height));
  position: sticky;
  top: var(--header-height);
  overflow-y: auto;
}

.sidebar-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  padding: 0 0.75rem 0.75rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 0.75rem;
}

.step-nav-list {
  list-style: none;
}

.step-nav-item {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.55rem 0.75rem;
  border-radius: 6px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.82rem;
  margin-bottom: 0.25rem;
  transition: all 0.2s ease;
  border: 1px solid transparent;
}

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

.step-nav-item.active {
  background-color: rgba(225, 48, 108, 0.12);
  color: var(--text-primary);
  border-color: rgba(225, 48, 108, 0.35);
  font-weight: 600;
}

.step-nav-item.completed {
  color: var(--accent-emerald);
}

.step-nav-badge {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
  flex-shrink: 0;
}

.step-nav-item.active .step-nav-badge {
  background: var(--accent-ig-gradient);
  color: #ffffff;
}

.step-nav-item.completed .step-nav-badge {
  background-color: var(--accent-emerald);
  color: #070913;
}

/* Content Area */
.content-area {
  flex: 1;
  padding: 2rem 2.5rem;
  max-width: 1000px;
  min-width: 0;
}

/* Step Card */
.step-card {
  display: none;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2.25rem;
  margin-bottom: 2rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
}

.step-card.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

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

.step-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.25rem;
  margin-bottom: 1.75rem;
}

.step-tag-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.stage-badge {
  background-color: rgba(225, 48, 108, 0.15);
  color: var(--accent-ig-pink);
  border: 1px solid rgba(225, 48, 108, 0.3);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.epistemic-pill {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.18rem 0.5rem;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.pill-established {
  background-color: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.pill-evidence {
  background-color: rgba(6, 182, 212, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(6, 182, 212, 0.3);
}

.pill-emerging {
  background-color: rgba(245, 158, 11, 0.15);
  color: var(--accent-amber);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.pill-speculative {
  background-color: rgba(244, 63, 94, 0.15);
  color: var(--accent-rose);
  border: 1px solid rgba(244, 63, 94, 0.3);
}

.step-header h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
}

.step-subtitle {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-top: 0.35rem;
}

/* Typography & Prose */
.step-body h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 1.75rem 0 0.75rem;
}

.step-body h4 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--accent-ig-yellow);
  margin: 1.25rem 0 0.5rem;
}

.step-body p {
  color: #cbd5e1;
  margin-bottom: 1.1rem;
  font-size: 0.95rem;
  line-height: 1.65;
}

.step-body ul, .step-body ol {
  margin: 0.75rem 0 1.25rem 1.5rem;
  color: #cbd5e1;
}

.step-body li {
  margin-bottom: 0.45rem;
  font-size: 0.93rem;
}

.step-body strong {
  color: var(--text-primary);
}

.step-body code {
  font-family: var(--font-mono);
  background-color: var(--bg-tertiary);
  color: #38bdf8;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.85rem;
}

/* Callout Alerts */
.alert-box {
  padding: 1.15rem 1.35rem;
  border-radius: 8px;
  margin: 1.35rem 0;
  border-left: 4px solid;
  font-size: 0.92rem;
}

.alert-info {
  background-color: rgba(6, 182, 212, 0.08);
  border-color: var(--accent-cyan);
  color: #e0f2fe;
}

.alert-warning {
  background-color: rgba(245, 158, 11, 0.08);
  border-color: var(--accent-amber);
  color: #fef3c7;
}

.alert-tip {
  background-color: rgba(16, 185, 129, 0.08);
  border-color: var(--accent-emerald);
  color: #d1fae5;
}

.alert-caution {
  background-color: rgba(244, 63, 94, 0.08);
  border-color: var(--accent-rose);
  color: #ffe4e6;
}

/* Comparative Tables */
.table-container {
  overflow-x: auto;
  margin: 1.25rem 0 1.75rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.comp-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  text-align: left;
}

.comp-table th {
  background-color: var(--bg-secondary);
  color: var(--text-secondary);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-color);
}

.comp-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-color);
  color: #cbd5e1;
}

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

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

/* Diagram Boxes */
.diagram-box {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.25rem;
  margin: 1.25rem 0;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: #38bdf8;
  line-height: 1.6;
  white-space: pre-wrap;
  overflow-x: auto;
}

/* Multi-OS Terminal Card */
.terminal-block {
  margin: 1.5rem 0;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
}

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

.terminal-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.os-switcher {
  display: flex;
  gap: 0.35rem;
}

.os-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.75rem;
  padding: 0.25rem 0.55rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s ease;
}

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

.os-btn.active {
  background: var(--accent-ig-gradient);
  color: #ffffff;
  border-color: transparent;
  font-weight: 600;
}

.terminal-content {
  padding: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
  color: #e2e8f0;
  overflow-x: auto;
  position: relative;
}

.terminal-card {
  display: none;
}

.terminal-card.active {
  display: block;
}

.copy-btn {
  position: absolute;
  top: 0.65rem;
  right: 0.65rem;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.72rem;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  cursor: pointer;
}

.copy-btn:hover {
  color: var(--text-primary);
  border-color: var(--accent-ig-pink);
}

/* Interactive Calculators & Widgets */
.calculator-box {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 1.5rem;
  margin: 1.5rem 0;
}

.calc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin-top: 1rem;
}

.calc-item {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem;
}

.calc-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.calc-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
}

.calc-val {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-ig-pink);
  font-family: var(--font-mono);
}

.calc-slider {
  width: 100%;
  accent-color: var(--accent-ig-pink);
  cursor: pointer;
}

.calc-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
}

.score-display-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: linear-gradient(135deg, rgba(225, 48, 108, 0.1), rgba(131, 58, 180, 0.1));
  border: 1px solid rgba(225, 48, 108, 0.3);
  border-radius: 8px;
  padding: 1.25rem 1.75rem;
  margin-top: 1.5rem;
}

.total-score-badge {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--accent-ig-pink);
  font-family: var(--font-mono);
}

.tier-readout {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
}

.tier-detail {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

/* Capstone 6-Version Switcher */
.capstone-switcher {
  margin: 1.5rem 0;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
}

.capstone-tabs {
  display: flex;
  overflow-x: auto;
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
}

.cap-tab-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 0.75rem 1.1rem;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: all 0.2s ease;
}

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

.cap-tab-btn.active {
  color: var(--accent-ig-pink);
  border-bottom-color: var(--accent-ig-pink);
  background-color: rgba(225, 48, 108, 0.05);
}

.capstone-body {
  padding: 1.35rem;
}

.cap-version-view {
  display: none;
}

.cap-version-view.active {
  display: block;
}

/* Checkpoint Box */
.checkpoint-box {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  margin-top: 2rem;
}

.checkpoint-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--accent-emerald);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.checkpoint-prompt {
  font-size: 0.88rem;
  color: #cbd5e1;
  margin-bottom: 0.85rem;
}

.checkpoint-input-group {
  display: flex;
  gap: 0.75rem;
}

.checkpoint-input {
  flex: 1;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.6rem 0.85rem;
  border-radius: 6px;
  font-size: 0.88rem;
  outline: none;
}

.checkpoint-input:focus {
  border-color: var(--accent-ig-pink);
}

.checkpoint-btn {
  background: var(--accent-ig-gradient);
  color: #ffffff;
  border: none;
  padding: 0.6rem 1.25rem;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: opacity 0.2s ease;
}

.checkpoint-btn:hover {
  opacity: 0.9;
}

.checkpoint-feedback {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  display: none;
}

.checkpoint-feedback.success {
  display: block;
  color: var(--accent-emerald);
}

.checkpoint-feedback.error {
  display: block;
  color: var(--accent-rose);
}

/* Step Navigation Bottom Footer */
.step-nav-buttons {
  display: flex;
  justify-content: space-between;
  margin-top: 2.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-color);
}

.nav-action-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: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.nav-action-btn:hover {
  background-color: var(--bg-secondary);
  border-color: var(--accent-ig-pink);
}

.nav-action-btn.primary {
  background: var(--accent-ig-gradient);
  color: #ffffff;
  border: none;
}

/* Right Sidebar: Orbit AI Coach */
.coach-panel {
  width: var(--coach-width);
  background-color: var(--bg-secondary);
  border-left: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  height: calc(100vh - var(--header-height));
  position: sticky;
  top: var(--header-height);
  flex-shrink: 0;
}

.coach-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.coach-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.coach-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent-ig-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 800;
  color: #ffffff;
}

.coach-name {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
}

.coach-status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
}

.coach-quick-questions {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-tertiary);
  max-height: 170px;
  overflow-y: auto;
}

.quick-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 700;
  letter-spacing: 0.05em;
  margin-bottom: 0.45rem;
}

.faq-chip {
  display: block;
  width: 100%;
  text-align: left;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.4rem 0.65rem;
  border-radius: 4px;
  font-size: 0.75rem;
  margin-bottom: 0.35rem;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.faq-chip:hover {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border-color: var(--accent-ig-pink);
}

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

.msg-bubble {
  max-width: 90%;
  padding: 0.75rem 0.95rem;
  border-radius: 8px;
  font-size: 0.82rem;
  line-height: 1.5;
}

.msg-bot {
  align-self: flex-start;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: #e2e8f0;
}

.msg-user {
  align-self: flex-end;
  background: var(--accent-ig-gradient);
  color: #ffffff;
}

.coach-input-area {
  padding: 0.85rem 1rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  gap: 0.5rem;
}

.coach-input {
  flex: 1;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  font-size: 0.82rem;
  outline: none;
}

.coach-input:focus {
  border-color: var(--accent-ig-pink);
}

.coach-send-btn {
  background: var(--accent-ig-gradient);
  border: none;
  color: #ffffff;
  padding: 0.5rem 0.85rem;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
}

/* Responsive adjustments */
@media (max-width: 1200px) {
  .coach-panel {
    display: none;
  }
}

@media (max-width: 900px) {
  .steps-sidebar {
    display: none;
  }
  .content-area {
    padding: 1.5rem;
  }
}


/* 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;
}