/* ==========================================================================
   STEMulus Kids Tech – Extremely Glossy 3D High-End Light Engine
   Derived from portal.stemuluskidstech.com Design System
   Child-Friendly, Light Mode, Neutral Glossy Borders, Volumetric 3D Assets, Zero Emojis
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Fredoka:wght@600;700;800&family=Nunito:wght@400;600;700;800&family=JetBrains+Mono:wght@400;600&display=swap');

:root {
  --brand-orange: #F4600C;
  --brand-orange-deep: #C2410C;
  --brand-orange-shadow: #9A3412;
  --brand-indigo: #4F46E5;
  --brand-indigo-deep: #3730A3;
  --brand-emerald: #10B981;
  --brand-emerald-deep: #047857;

  --bg-page: #F1F5F9;
  --bg-subtle: #F8FAFC;
  --surface-white: #FFFFFF;
  --text-main: #1A2332;
  --text-muted: #475569;
  --text-light: #64748B;
  --border-neutral: #E2E8F0;
  --border-subtle: #EDF2F7;

  /* Volumetric Glossy Multi-Stage Shadows */
  --shadow-shell: inset 0 2px 1px 0 #FFFFFF, inset 0 4px 16px 0 rgba(255, 255, 255, 0.9), inset 0 -2px 4px 0 rgba(15, 23, 42, 0.02), 0 4px 10px rgba(15, 23, 42, 0.03), 0 20px 48px -8px rgba(15, 23, 42, 0.08), 0 36px 80px -16px rgba(15, 23, 42, 0.06);
  --shadow-card: inset 0 2px 1px 0 #FFFFFF, inset 0 -1.5px 2px 0 rgba(0, 0, 0, 0.02), 0 4px 12px rgba(15, 23, 42, 0.03), 0 10px 24px -4px rgba(15, 23, 42, 0.05);
  --shadow-float: 0 15px 35px -8px rgba(15, 23, 42, 0.12);

  --radius-shell: 28px;
  --radius-card: 20px;
  --radius-badge: 8px;
  --radius-tag: 10px;
  --radius-pill: 10px;
  --radius-btn: 14px;
}

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

body {
  font-family: 'Nunito', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-page);
  color: var(--text-main);
  min-height: 100vh;
  height: 100vh;
  box-sizing: border-box;
  margin: 0;
  padding: 0 0 14px 0; /* clean margin at bottom of page so footer never touches or clips into screen bottom */
  display: flex;
  flex-direction: column;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ==========================================================================
   GLOSSY 3D HEADER & NAVIGATION BAR
   ========================================================================== */
header.slide-header {
  height: 60px;
  min-height: 60px;
  max-height: 60px;
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 70%, #F1F5F9 100%);
  border-bottom: 1px solid rgba(226, 232, 240, 0.9);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  z-index: 100;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.03), inset 0 1px 0 #FFFFFF, inset 0 -1px 0 rgba(226, 232, 240, 0.8);
  gap: 12px;
  box-sizing: border-box;
  overflow: hidden;
}

.logo-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  min-width: 0;
}

.logo-img {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  object-fit: contain;
  filter: drop-shadow(0 2px 4px rgba(15, 23, 42, 0.08));
}

.brand-text {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-weight: 700;
  font-size: 16px;
  color: var(--text-main);
  letter-spacing: -0.2px;
  white-space: nowrap;
}

.lesson-tag {
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 60%, #F1F5F9 100%);
  color: var(--text-muted);
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 700;
  border: 1px solid var(--border-neutral);
  border-top: 1.5px solid #FFFFFF;
  display: flex;
  align-items: center;
  gap: 6px;
  box-shadow: inset 0 1.5px 0.5px #FFFFFF, 0 2px 6px rgba(15, 23, 42, 0.03);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 360px;
  flex-shrink: 1;
  min-width: 0;
  line-height: 1.2;
}

.lesson-tag span {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.slide-dots-ribbon {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.ctrl-btn {
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 60%, #F1F5F9 100%);
  border: 1px solid var(--border-neutral);
  border-top: 1.5px solid #FFFFFF;
  color: var(--text-muted);
  padding: 6px 10px;
  border-radius: 10px;
  cursor: pointer;
  font-family: 'Nunito', sans-serif;
  font-weight: 700;
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: inset 0 1.5px 0.5px #FFFFFF, 0 2px 0 #CBD5E1, 0 3px 8px rgba(15, 23, 42, 0.03);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  flex-shrink: 0;
}

@media (max-width: 1440px) {
  .lesson-tag {
    max-width: 280px;
  }
  .ctrl-btn {
    padding: 5px 8px;
    font-size: 11px;
    gap: 4px;
  }
}

@media (max-width: 1280px) {
  .lesson-tag {
    max-width: 220px;
  }
  .brand-text {
    display: none;
  }
}

.ctrl-btn::before {
  content: '';
  position: absolute;
  top: 1px;
  left: 2px;
  right: 2px;
  height: 42%;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.8) 0%, rgba(255, 255, 255, 0.1) 100%);
  border-radius: 10px 10px 4px 4px;
  pointer-events: none;
}

.ctrl-btn:hover {
  background: #FFFFFF;
  color: var(--text-main);
  border-color: #CBD5E1;
  transform: translateY(-1px);
  box-shadow: inset 0 1.5px 0.5px #FFFFFF, 0 3px 0 #94A3B8, 0 6px 12px rgba(15, 23, 42, 0.06);
}

.ctrl-btn:active {
  transform: translateY(2px);
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.06), 0 1px 0 #94A3B8;
}

.ctrl-btn.active {
  background: linear-gradient(180deg, #EEF2FF 0%, #E0E7FF 100%);
  color: var(--brand-indigo);
  border-color: #C7D2FE;
  box-shadow: inset 0 1.5px 0.5px #FFFFFF, 0 2px 0 #818CF8, 0 4px 8px rgba(79, 70, 229, 0.1);
}

.ui-svg {
  width: 15px;
  height: 15px;
  stroke: currentColor;
  stroke-width: 2.2;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

.progress-container {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3.5px;
  background: rgba(226, 232, 240, 0.8);
}

.progress-bar {
  height: 100%;
  width: 16.66%;
  background: linear-gradient(90deg, #FF7E36 0%, #F4600C 50%, #4F46E5 100%);
  box-shadow: 0 0 10px rgba(244, 96, 12, 0.28), inset 0 1px 0 rgba(255, 255, 255, 0.6);
  transition: width 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   GLOSSY 3D SLIDE VIEWPORT & SHELL
   ========================================================================== */
main.slide-viewport {
  flex: 1;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  min-height: 0;
  overflow: hidden;
}

.slide {
  display: none;
  width: 100%;
  max-width: 1140px;
  height: 100%;
  max-height: 100%;
  background: linear-gradient(180deg, #FFFFFF 0%, #FAFCFE 50%, #F8FAFD 100%);
  border: 1.5px solid rgba(255, 255, 255, 0.95);
  outline: 1px solid var(--border-neutral);
  border-radius: var(--radius-shell);
  padding: 20px 28px;
  overflow-y: hidden;
  box-shadow: var(--shadow-shell);
  position: relative;
  animation: slideFadeIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  box-sizing: border-box;
}

@media (max-height: 640px) {
  .slide {
    overflow-y: auto;
  }
}

.slide:has(.tool-setup-grid) {
  overflow-y: auto !important;
}

.slide.active {
  display: flex;
  flex-direction: column;
}

@keyframes slideFadeIn {
  from {
    opacity: 0;
    transform: translateY(8px) scale(0.995);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* ==========================================================================
   TYPOGRAPHY
   ========================================================================== */
.slide h1 {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 30px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-main);
  margin-top: 6px;
  margin-bottom: 6px;
  text-shadow: 0 1px 2px rgba(255, 255, 255, 0.8);
}

.slide h2 {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 24px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
  text-shadow: 0 1px 2px rgba(255, 255, 255, 0.8);
}

.slide p.subtitle {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 14px;
}

/* ==========================================================================
   3D ASSET PRESENTATION STYLES (PHYSICAL VOLUMETRIC SHADOWS)
   ========================================================================== */
.hero-3d-layout {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-top: 6px;
}

.hero-3d-object {
  width: 115px;
  height: 115px;
  max-width: 115px;
  max-height: 115px;
  object-fit: contain;
  filter: drop-shadow(0 6px 12px rgba(15, 23, 42, 0.1)) drop-shadow(0 14px 24px rgba(15, 23, 42, 0.12));
  flex-shrink: 0;
  pointer-events: none;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), filter 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.slide-title-3d {
  width: 38px;
  height: 38px;
  object-fit: contain;
  flex-shrink: 0;
  filter: drop-shadow(0 3px 6px rgba(15, 23, 42, 0.08)) drop-shadow(0 8px 16px rgba(15, 23, 42, 0.08));
}

.concept-icon-3d {
  width: 44px;
  height: 44px;
  object-fit: contain;
  flex-shrink: 0;
  filter: drop-shadow(0 4px 6px rgba(15, 23, 42, 0.08)) drop-shadow(0 10px 18px rgba(15, 23, 42, 0.1));
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), filter 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.tier-icon-3d {
  width: 36px;
  height: 36px;
  object-fit: contain;
  flex-shrink: 0;
  filter: drop-shadow(0 3px 6px rgba(15, 23, 42, 0.08)) drop-shadow(0 8px 16px rgba(15, 23, 42, 0.1));
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.slide-card-3d {
  width: 42px;
  height: 42px;
  object-fit: contain;
  flex-shrink: 0;
  filter: drop-shadow(0 4px 8px rgba(15, 23, 42, 0.08)) drop-shadow(0 10px 18px rgba(15, 23, 42, 0.09));
}

/* ==========================================================================
   CARDS & GRIDS (GLOSSY 3D SKEUOMORPHISM)
   ========================================================================== */
.content-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;
  margin: 12px 0;
}

.card {
  background: linear-gradient(180deg, #FFFFFF 0%, #FAFCFF 60%, #F1F5F9 100%);
  border: 1px solid rgba(226, 232, 240, 0.9);
  border-top: 1.5px solid #FFFFFF;
  border-radius: var(--radius-card);
  padding: 16px 20px;
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.2s ease;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 36%;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.8) 0%, rgba(255, 255, 255, 0.05) 100%);
  pointer-events: none;
}

.card:hover {
  transform: translateY(-3px) scale(1.006);
  border-color: #CBD5E1;
  box-shadow: inset 0 2px 1px 0 #FFFFFF, 0 14px 34px -4px rgba(15, 23, 42, 0.09), 0 3px 0 #CBD5E1;
}

.card:hover .concept-icon-3d {
  transform: translateY(-3px) scale(1.08);
  filter: drop-shadow(0 6px 10px rgba(15, 23, 42, 0.12)) drop-shadow(0 16px 26px rgba(15, 23, 42, 0.15));
}

.card-title {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.card-desc {
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--text-muted);
  font-weight: 600;
}

.mission-card {
  background: linear-gradient(180deg, #FFFDF9 0%, #FFF7ED 50%, #FFEDD5 100%);
  border: 1px solid #FED7AA;
  border-top: 2px solid #FFFFFF;
  border-radius: var(--radius-card);
  padding: 16px 20px;
  margin-top: 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  box-shadow: inset 0 2px 1px 0 #FFFFFF, inset 0 -2px 3px 0 rgba(244, 96, 12, 0.05), 0 6px 20px rgba(244, 96, 12, 0.08);
  position: relative;
  overflow: hidden;
}

.mission-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 40%;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.75) 0%, rgba(255, 255, 255, 0.1) 100%);
  pointer-events: none;
}

.mission-card-content {
  flex: 1;
  position: relative;
  z-index: 2;
}

.mission-title {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 18px;
  font-weight: 700;
  color: var(--brand-orange-deep);
  margin-bottom: 6px;
}

.mission-text {
  font-size: 15px;
  line-height: 1.6;
  color: #7C2D12;
  font-weight: 600;
}

/* ==========================================================================
   GLOSSY CODE BLOCK & CONSOLE
   ========================================================================== */
.code-container {
  margin-top: 14px;
}

.code-header {
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-light);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.code-block {
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
  border: 1.5px solid #CBD5E1;
  border-top: 2px solid #FFFFFF;
  border-radius: 12px;
  padding: 12px 16px;
  font-family: 'JetBrains Mono', 'Consolas', monospace;
  font-size: 12.5px;
  color: #1E293B;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.5;
  box-shadow: inset 0 1.5px 0.5px #FFFFFF, 0 6px 18px -4px rgba(15, 23, 42, 0.06);
}

/* ==========================================================================
   CO-PILOT GUIDED STEPS
   ========================================================================== */
.copilot-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 14px;
}

.copilot-item {
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 60%, #F1F5F9 100%);
  border: 1px solid rgba(226, 232, 240, 0.9);
  border-top: 1.5px solid #FFFFFF;
  border-radius: 16px;
  padding: 18px 22px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
  transition: transform 0.18s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.18s ease;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.copilot-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 38%;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.8) 0%, rgba(255, 255, 255, 0.05) 100%);
  pointer-events: none;
}

.copilot-item:hover {
  transform: translateY(-2px);
  box-shadow: inset 0 2px 1px 0 #FFFFFF, 0 12px 28px -4px rgba(15, 23, 42, 0.08), 0 3px 0 #CBD5E1;
  border-color: #CBD5E1;
}

.step-number {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 50%, #EDF2F7 100%);
  border: 1px solid rgba(226, 232, 240, 0.9);
  border-top: 1.5px solid #FFFFFF;
  color: var(--text-main);
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-weight: 700;
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: inset 0 1.5px 0.5px #FFFFFF, 0 2px 6px rgba(15, 23, 42, 0.05);
}

.step-title {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 3px;
}

.step-desc {
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-muted);
  font-weight: 600;
}

/* ==========================================================================
   TIERED SOLO QUESTS (GLOSSY 3D INTERACTIVE CHECKLIST)
   ========================================================================== */
.quest-tier {
  border-radius: 16px;
  padding: 16px 20px;
  min-height: 96px;
  margin-bottom: 14px;
  display: flex;
  gap: 18px;
  align-items: center;
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 60%, #F1F5F9 100%);
  border: 1px solid rgba(226, 232, 240, 0.9);
  border-top: 1.5px solid #FFFFFF;
  box-shadow: inset 0 2px 1px 0 #FFFFFF, inset 0 -1.5px 2px 0 rgba(0, 0, 0, 0.02), 0 3px 0 #E2E8F0, 0 6px 16px rgba(15, 23, 42, 0.04);
  cursor: pointer;
  transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  user-select: none;
  position: relative;
  overflow: visible;
}

.quest-tier::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 40%;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.75) 0%, rgba(255, 255, 255, 0.05) 100%);
  pointer-events: none;
  border-radius: 15px 15px 0 0;
}

.quest-tier:hover {
  transform: translateY(-3px);
  border-color: #CBD5E1;
  box-shadow: inset 0 2px 1px 0 #FFFFFF, 0 5px 0 #CBD5E1, 0 14px 28px rgba(15, 23, 42, 0.08);
}

.quest-tier:hover .tier-icon-3d {
  transform: scale(1.1);
}

.quest-badge-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  min-width: 105px;
  flex-shrink: 0;
}

.badge-tag {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-weight: 700;
  font-size: 12px;
  padding: 4px 10px;
  border-radius: var(--radius-badge);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 50%, #EDF2F7 100%);
  border: 1px solid var(--border-neutral);
  border-top: 1px solid #FFFFFF;
  color: var(--text-muted);
  box-shadow: inset 0 1px 0.5px #FFFFFF, 0 2px 4px rgba(15, 23, 42, 0.03);
}

/* Modern Unified Quest Badge (Replaces Double-Stacked Pills & Prevents Cutoffs) */
.quest-combined-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-weight: 700;
  font-size: 11.5px;
  padding: 4px 10px;
  border-radius: var(--radius-badge);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: inset 0 1px 0.5px #FFFFFF, 0 2px 4px rgba(15, 23, 42, 0.04);
  white-space: nowrap;
}

.quest-combined-badge .badge-sep {
  opacity: 0.45;
  font-size: 10px;
}

.quest-combined-badge.gold, .quest-tier.gold .badge-tag {
  color: #B45309;
  background: linear-gradient(180deg, #FFFBEB 0%, #FEF3C7 60%, #FDE68A 100%);
  border: 1px solid #FDE047;
  border-top: 1px solid #FFFFFF;
}

.quest-combined-badge.silver, .quest-tier.silver .badge-tag {
  color: #334155;
  background: linear-gradient(180deg, #FFFFFF 0%, #F1F5F9 60%, #E2E8F0 100%);
  border: 1px solid #CBD5E1;
  border-top: 1px solid #FFFFFF;
}

.quest-combined-badge.bronze, .quest-tier.bronze .badge-tag {
  color: #9A3412;
  background: linear-gradient(180deg, #FFF7ED 0%, #FFEDD5 60%, #FED7AA 100%);
  border: 1px solid #FDBA74;
  border-top: 1px solid #FFFFFF;
}

.quest-info {
  flex: 1;
}

.quest-title {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 4px;
}

.quest-desc {
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-muted);
  font-weight: 600;
}

/* ==========================================================================
   INTERACTIVE CHECKPOINT QUIZ (GLOSSY 3D TILES)
   ========================================================================== */
.quiz-box {
  background: linear-gradient(180deg, #FFFFFF 0%, #FAFCFE 50%, #F8FAFD 100%);
  border: 1px solid rgba(226, 232, 240, 0.9);
  border-top: 1.5px solid #FFFFFF;
  border-radius: var(--radius-card);
  padding: 28px;
  margin: 18px 0;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.quiz-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 35%;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.8) 0%, rgba(255, 255, 255, 0.05) 100%);
  pointer-events: none;
}

.quiz-question {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 12px;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.quiz-btn {
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 50%, #F1F5F9 100%);
  border: 1px solid #E2E8F0;
  border-top: 1.5px solid #FFFFFF;
  color: var(--text-main);
  padding: 14px 20px;
  border-radius: 14px;
  text-align: left;
  font-family: 'Nunito', sans-serif;
  font-weight: 700;
  font-size: 14.5px;
  cursor: pointer;
  transition: all 0.15s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: inset 0 1.5px 1px 0 #FFFFFF, 0 3px 0 #CBD5E1, 0 4px 10px rgba(15, 23, 42, 0.03);
  position: relative;
  overflow: hidden;
}

.quiz-btn::before {
  content: '';
  position: absolute;
  top: 1px;
  left: 2px;
  right: 2px;
  height: 42%;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.7) 0%, rgba(255, 255, 255, 0.05) 100%);
  border-radius: 12px 12px 6px 6px;
  pointer-events: none;
}

.quiz-btn:hover {
  transform: translateY(-2px);
  border-color: #CBD5E1;
  box-shadow: inset 0 1.5px 1px 0 #FFFFFF, 0 5px 0 #94A3B8, 0 8px 18px rgba(15, 23, 42, 0.07);
}

.quiz-btn:active {
  transform: translateY(2px);
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.08), 0 1px 0 #CBD5E1;
}

.quiz-btn.correct {
  background: linear-gradient(180deg, #F0FDF4 0%, #DCFCE7 50%, #BBF7D0 100%) !important;
  border-color: #86EFAC !important;
  border-top: 1.5px solid #FFFFFF !important;
  color: #166534 !important;
  font-weight: 800;
  box-shadow: inset 0 2px 1px 0 #FFFFFF, 0 3px 0 #4ADE80, 0 6px 16px rgba(16, 185, 129, 0.2) !important;
}

.quiz-btn.wrong {
  background: linear-gradient(180deg, #FFF1F2 0%, #FEE2E2 50%, #FECACA 100%) !important;
  border-color: #FCA5A5 !important;
  border-top: 1.5px solid #FFFFFF !important;
  color: #991B1B !important;
  font-weight: 800;
  box-shadow: inset 0 2px 1px 0 #FFFFFF, 0 3px 0 #F87171, 0 6px 16px rgba(239, 68, 68, 0.2) !important;
}

.quiz-explanation {
  display: none;
  margin-top: 16px;
  padding: 16px 20px;
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 60%, #F1F5F9 100%);
  border: 1px solid var(--border-neutral);
  border-top: 1.5px solid #FFFFFF;
  border-radius: 14px;
  font-size: 14px;
  line-height: 1.55;
  color: var(--text-muted);
  font-weight: 600;
  box-shadow: inset 0 1.5px 0.5px #FFFFFF, 0 4px 12px rgba(15, 23, 42, 0.03);
}

/* ==========================================================================
   BUTTONS (GLOSSY 3D TACTILE CANDY SPECULAR SYSTEM)
   ========================================================================== */
/* 3D Tactile Buttons: Direction 1 - Linear Modern Tactile Primary */
.btn-3d {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 26px;
  border-radius: var(--radius-btn);
  font-family: 'Nunito', sans-serif;
  font-weight: 800;
  font-size: 14.5px;
  text-decoration: none;
  cursor: pointer;
  user-select: none;
  overflow: hidden;
  background: linear-gradient(180deg, #38BDF8 0%, #0284C7 100%);
  border: 1px solid #0369A1;
  border-top: 1.5px solid #7DD3FC;
  box-shadow: 
    inset 0 1px 0 0 rgba(255, 255, 255, 0.75),
    inset 0 -1.5px 0 0 rgba(2, 44, 90, 0.25),
    0 4px 0 0 #0369A1,
    0 8px 18px rgba(14, 165, 233, 0.28);
  transition: all 0.14s cubic-bezier(0.16, 1, 0.3, 1);
  color: #FFFFFF !important;
  text-shadow: 0 1px 2px rgba(2, 44, 90, 0.3);
}

.btn-3d::before {
  display: none;
}

.btn-3d:hover {
  transform: translateY(-2px);
  background: linear-gradient(180deg, #60A5FA 0%, #0284C7 100%);
  box-shadow: 
    inset 0 1px 0 0 rgba(255, 255, 255, 0.9),
    0 6px 0 0 #0369A1,
    0 12px 24px rgba(14, 165, 233, 0.36);
}

.btn-3d:active {
  transform: translateY(3px);
  box-shadow: 
    inset 0 1px 3px rgba(0, 0, 0, 0.25),
    0 1px 0 0 #0369A1,
    0 3px 6px rgba(14, 165, 233, 0.2);
}

.btn-3d.neutral {
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 50%, #EDF2F7 100%);
  color: var(--text-main) !important;
  border: 1px solid var(--border-neutral);
  border-top: 1.5px solid #FFFFFF;
  box-shadow: inset 0 2px 1px 0 #FFFFFF, inset 0 -1.5px 2px 0 rgba(0, 0, 0, 0.05), 0 3px 0 #CBD5E1, 0 6px 14px rgba(15, 23, 42, 0.06);
  text-shadow: none;
}

.btn-3d.neutral::before {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.75) 0%, rgba(255, 255, 255, 0.1) 100%);
}

.btn-3d.neutral:hover {
  transform: translateY(-2px);
  box-shadow: inset 0 2px 1px 0 #FFFFFF, 0 5px 0 #94A3B8, 0 10px 20px rgba(15, 23, 42, 0.08);
}

.btn-3d.neutral:active {
  transform: translateY(2px);
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.08), 0 1px 0 #94A3B8, 0 2px 6px rgba(15, 23, 42, 0.04);
}

.btn-3d:disabled, .btn-3d.disabled {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
  box-shadow: none;
}

/* ==========================================================================
   FOOTER & NAVIGATION
   ========================================================================== */
footer.slide-footer {
  height: 54px;
  min-height: 54px;
  max-height: 54px;
  background: linear-gradient(180deg, #F8FAFC 0%, #FFFFFF 50%, #FFFFFF 100%);
  border: 1px solid rgba(226, 232, 240, 0.9);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  margin: 0 24px;
  z-index: 100;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.03), inset 0 1px 0 #FFFFFF;
  flex-shrink: 0;
}

.slide-counter {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 700;
}

.nav-buttons {
  display: flex;
  gap: 12px;
}

/* ==========================================================================
   TUTOR MISSION CONTROL COCKPIT (DUAL HUD & DRAWER)
   ========================================================================== */
.tutor-cockpit-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: 480px;
  max-width: 92vw;
  height: 100vh;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(28px);
  -webkit-backdrop-filter: blur(28px);
  border: 1.5px solid rgba(226, 232, 240, 0.95);
  box-shadow: -16px 0 48px rgba(15, 23, 42, 0.16);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.tutor-cockpit-drawer.open {
  transform: translateX(0);
}

.cockpit-header {
  padding: 18px 24px;
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
  border-bottom: 1.5px solid #E2E8F0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.cockpit-title {
  display: flex;
  align-items: center;
  gap: 12px;
}

.cockpit-icon {
  width: 32px;
  height: 32px;
  object-fit: contain;
  filter: drop-shadow(0 2px 4px rgba(79, 70, 229, 0.25));
}

.cockpit-headline {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 17px;
  font-weight: 700;
  color: var(--brand-indigo);
  letter-spacing: -0.2px;
}

.cockpit-subline {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
}

.cockpit-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.cockpit-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: #FFFFFF;
  border: 1.5px solid #CBD5E1;
  border-radius: 8px;
  font-size: 12px;
  font-weight: 700;
  color: var(--text-dark);
  cursor: pointer;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.05);
  transition: all 0.15s ease;
}

.cockpit-btn:hover {
  background: #F1F5F9;
  border-color: #94A3B8;
}

.cockpit-close-btn {
  background: none;
  border: none;
  font-size: 24px;
  line-height: 1;
  font-weight: 800;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
  transition: color 0.15s;
}

.cockpit-close-btn:hover {
  color: #EF4444;
  background: #FEE2E2;
}

/* Cockpit Tabs Navigation */
.cockpit-tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: #F1F5F9;
  padding: 6px;
  gap: 6px;
  border-bottom: 1.5px solid #E2E8F0;
}

.cockpit-tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 8px 4px;
  background: transparent;
  border: 1.5px solid transparent;
  border-radius: 8px;
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s ease;
}

.cockpit-tab:hover {
  background: rgba(255, 255, 255, 0.6);
  color: var(--text-dark);
}

.cockpit-tab.active {
  background: #FFFFFF;
  border-color: #CBD5E1;
  color: var(--brand-indigo);
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.06);
}

.cockpit-tab .tab-icon-3d {
  width: 20px;
  height: 20px;
  object-fit: contain;
}

/* Cockpit Body & Panes */
.cockpit-body {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.cockpit-tab-pane {
  display: none;
  flex-direction: column;
  gap: 16px;
}

.cockpit-tab-pane.active {
  display: flex;
}

.cockpit-card {
  background: #FFFFFF;
  border: 1.5px solid #E2E8F0;
  border-top: 2px solid #FFFFFF;
  border-radius: 14px;
  padding: 16px 18px;
  box-shadow: 0 3px 12px rgba(15, 23, 42, 0.04);
}

.cockpit-card-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 14px;
  font-weight: 700;
  color: var(--brand-indigo);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.cockpit-card-body {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--text-dark);
}

.protocol-card {
  background: linear-gradient(180deg, #F0FDF4 0%, #DCFCE7 100%);
  border-color: #86EFAC;
}

.protocol-card .cockpit-card-title {
  color: #166534;
}

/* Bug Radar Traps */
.bug-radar-item {
  background: #FFF7ED;
  border: 1.5px solid #FED7AA;
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 10px;
}

.bug-radar-head {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  font-weight: 800;
  color: #C2410C;
  margin-bottom: 4px;
}

.bug-radar-desc {
  font-size: 12.5px;
  line-height: 1.5;
  color: #7C2D12;
  margin: 0;
}

/* Pacing Stopwatch */
.pacing-timer-box {
  background: linear-gradient(180deg, #FFFFFF 0%, #F1F5F9 100%);
  border: 1.5px solid #CBD5E1;
  border-top: 2px solid #FFFFFF;
  border-radius: 16px;
  padding: 20px;
  text-align: center;
  box-shadow: inset 0 2px 1px #FFFFFF, 0 6px 18px rgba(15, 23, 42, 0.06);
}

.pacing-clock-display {
  font-family: 'JetBrains Mono', 'Consolas', monospace;
  font-size: 44px;
  font-weight: 800;
  color: var(--brand-indigo);
  letter-spacing: 2px;
  margin-bottom: 12px;
}

.pacing-timer-btns {
  display: flex;
  justify-content: center;
  gap: 10px;
}

.timer-btn {
  padding: 8px 18px;
  background: #FFFFFF;
  border: 1.5px solid #CBD5E1;
  border-radius: 8px;
  color: var(--text-main);
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s ease;
  box-shadow: 0 2px 4px rgba(15, 23, 42, 0.04);
}

.timer-btn:hover {
  background: #EEF2FF;
  border-color: #6366F1;
  color: var(--brand-indigo);
}

.pacing-milestones-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.milestone-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: #FFFFFF;
  border: 1.5px solid #E2E8F0;
  border-radius: 10px;
  transition: all 0.2s ease;
}

.milestone-row.active {
  background: #EEF2FF;
  border-color: #6366F1;
  box-shadow: 0 0 0 1.5px #6366F1;
}

.milestone-badge {
  padding: 4px 8px;
  background: #F1F5F9;
  border-radius: 6px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 800;
  color: var(--text-dark);
}

.milestone-row.active .milestone-badge {
  background: var(--brand-indigo);
  color: #FFFFFF;
}

.milestone-text {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--text-dark);
}

/* Classroom Quick-Copy Preview */
.classroom-copy-preview {
  background: #F8FAFC;
  border: 1.5px solid #E2E8F0;
  border-radius: 10px;
  padding: 14px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11.5px;
  line-height: 1.6;
  color: #334155;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 240px;
  overflow-y: auto;
}

/* Presenter Mode (Full-Screen Teleprompter) */
body.presenter-mode {
  background: #F8FAFC;
}

body.presenter-mode .slide-viewport,
body.presenter-mode .slide-header,
body.presenter-mode .slide-footer {
  display: none !important;
}

body.presenter-mode .tutor-cockpit-drawer {
  position: static !important;
  width: 100vw !important;
  max-width: 100vw !important;
  height: 100vh !important;
  transform: none !important;
  box-shadow: none !important;
  border: none !important;
}

/* ==========================================================================
   TACTILE MECHANICAL XP TALLY COUNTER WIDGET
   ========================================================================== */
.quest-xp-counter {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(180deg, #FFFFFF 0%, #F1F5F9 100%);
  border: 1.5px solid #CBD5E1;
  border-top: 2px solid #FFFFFF;
  border-radius: 10px;
  padding: 6px 14px;
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 15px;
  font-weight: 800;
  color: var(--brand-indigo);
  box-shadow: inset 0 1px 1px #FFFFFF, 0 2px 6px rgba(15, 23, 42, 0.08);
}

.xp-counter-icon {
  width: 22px;
  height: 22px;
  object-fit: contain;
}

/* Slide 3 Action Step Tags */
.step-action-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 8px;
  padding: 4px 10px;
  background: #EEF2FF;
  border: 1px solid #C7D2FE;
  border-radius: 8px;
  font-size: 12px;
  font-weight: 700;
  color: #4338CA;
}

.step-action-tag .ui-svg {
  width: 12px;
  height: 12px;
  fill: #4338CA;
}

/* Slide 2 Two-Column Responsive Layout */
.slide:nth-child(2) {
  overflow-y: auto;
  max-height: calc(100vh - 150px);
}

.notes-section {
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-top: 1.5px solid #FFFFFF;
  border-radius: 12px;
  padding: 14px 18px;
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.02);
}

.notes-section-head {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 13px;
  font-weight: 700;
  color: var(--brand-indigo);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.notes-section-body {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.55;
  font-weight: 600;
}

/* ==========================================================================
   TOOLKIT SETUP CARD (GLOSSY SKEUOMORPHISM)
   ========================================================================== */
.tool-setup-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin: 16px 0;
}

.tool-setup-card {
  background: linear-gradient(180deg, #FFFFFF 0%, #FAFCFF 60%, #F1F5F9 100%);
  border: 1px solid rgba(226, 232, 240, 0.9);
  border-top: 1.5px solid #FFFFFF;
  border-radius: var(--radius-card);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: var(--shadow-card);
  transition: transform 0.18s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.18s ease;
  position: relative;
  overflow: hidden;
}

.tool-setup-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 38%;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.75) 0%, rgba(255, 255, 255, 0.05) 100%);
  pointer-events: none;
}

.tool-setup-card:hover {
  transform: translateY(-3px) scale(1.006);
  border-color: #CBD5E1;
  box-shadow: inset 0 2px 1px 0 #FFFFFF, 0 14px 30px -4px rgba(15, 23, 42, 0.08), 0 3px 0 #CBD5E1;
}

.tool-badge-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.tool-type-badge {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 3px 8px;
  border-radius: var(--radius-pill);
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 60%, #EDF2F7 100%);
  border: 1px solid var(--border-neutral);
  border-top: 1px solid #FFFFFF;
  color: var(--text-muted);
  box-shadow: inset 0 1px 0.5px #FFFFFF, 0 2px 4px rgba(15, 23, 42, 0.03);
}

.tool-name {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 17px;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 10px;
}

.tool-desc {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.5;
  font-weight: 600;
  flex-grow: 1;
}

.tool-steps {
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 70%, #F1F5F9 100%);
  border: 1px solid var(--border-neutral);
  border-top: 1.5px solid #FFFFFF;
  border-radius: 12px;
  padding: 12px 14px;
  font-size: 12.5px;
  color: var(--text-main);
  line-height: 1.5;
  font-weight: 600;
  box-shadow: inset 0 1px 0.5px #FFFFFF, 0 2px 4px rgba(15, 23, 42, 0.02);
}

/* Tool launch button: Direction 1 - Linear Modern Tactile */
.tool-launch-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 12px;
  font-family: 'Nunito', sans-serif;
  font-weight: 800;
  font-size: 13.5px;
  text-decoration: none;
  background: linear-gradient(180deg, #38BDF8 0%, #0284C7 100%);
  border: 1px solid #0369A1;
  border-top: 1.5px solid #7DD3FC;
  box-shadow: 
    inset 0 1px 0 0 rgba(255, 255, 255, 0.75),
    inset 0 -1.5px 0 0 rgba(2, 44, 90, 0.25),
    0 3px 0 0 #0369A1,
    0 6px 14px rgba(14, 165, 233, 0.25);
  transition: all 0.14s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
  color: #FFFFFF !important;
  text-shadow: 0 1px 2px rgba(2, 44, 90, 0.3);
}

.tool-launch-btn::before {
  display: none;
}

.tool-launch-btn:hover {
  transform: translateY(-2px);
  background: linear-gradient(180deg, #60A5FA 0%, #0284C7 100%);
  box-shadow: 
    inset 0 1px 0 0 rgba(255, 255, 255, 0.9),
    0 5px 0 0 #0369A1,
    0 10px 20px rgba(14, 165, 233, 0.34);
}

.tool-launch-btn:active {
  transform: translateY(2px);
  box-shadow: 
    inset 0 1px 2px rgba(0, 0, 0, 0.2),
    0 1px 0 0 #0369A1,
    0 2px 4px rgba(14, 165, 233, 0.2);
}

.tool-launch-btn svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  stroke-width: 2.2;
  fill: none;
}

/* ==========================================================================
   GLOSSY CONCEPT VIDEO STAGE
   ========================================================================== */
.video-module {
  margin: 8px 0 10px;
}

.video-header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  flex-wrap: wrap;
  gap: 10px;
}

.video-title {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 15px;
  font-weight: 700;
  color: var(--brand-indigo);
  display: flex;
  align-items: center;
  gap: 8px;
}

.video-duration-pill {
  background: linear-gradient(180deg, #EFF6FF 0%, #DBEAFE 100%);
  border: 1px solid #BFDBFE;
  border-top: 1px solid #FFFFFF;
  color: #1E40AF;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 700;
  box-shadow: inset 0 1px 0.5px #FFFFFF, 0 2px 4px rgba(30, 64, 175, 0.06);
}

.video-launch-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: linear-gradient(180deg, #EF4444 0%, #DC2626 50%, #B91C1C 100%);
  color: #FFFFFF !important;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: 12.5px;
  font-weight: 800;
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-top: 1.5px solid rgba(255, 255, 255, 0.7);
  box-shadow: inset 0 1.5px 0.5px rgba(255, 255, 255, 0.6), 0 3px 0 #991B1B, 0 6px 14px rgba(220, 38, 38, 0.28);
  transition: all 0.12s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.video-launch-btn::before {
  content: '';
  position: absolute;
  top: 1px;
  left: 2px;
  right: 2px;
  height: 44%;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.5) 0%, rgba(255, 255, 255, 0.05) 100%);
  border-radius: var(--radius-pill);
  pointer-events: none;
}

.video-launch-btn:hover {
  transform: translateY(-2px);
  box-shadow: inset 0 1.5px 0.5px rgba(255, 255, 255, 0.8), 0 5px 0 #7F1D1D, 0 10px 20px rgba(220, 38, 38, 0.32);
}

.video-launch-btn:active {
  transform: translateY(2px);
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.3), 0 1px 0 #7F1D1D;
}

.video-launch-btn svg {
  width: 13px;
  height: 13px;
  fill: currentColor;
}

.video-body-grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 16px;
  align-items: stretch;
}

@media (max-width: 860px) {
  .video-body-grid {
    grid-template-columns: 1fr;
  }
}

.video-stage-card {
  background: #FFFFFF;
  border: 1.5px solid #CBD5E1;
  border-radius: 16px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 4px 6px -1px rgba(15, 23, 42, 0.05), 0 10px 20px -4px rgba(15, 23, 42, 0.08);
}

.video-frame-container {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  max-height: 180px;
  background: #0F172A;
  overflow: hidden;
}

.video-frame-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

.video-local-hint {
  padding: 6px 12px;
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
  color: #475569;
  font-size: 11px;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1.5px solid #E2E8F0;
  flex-wrap: wrap;
  gap: 6px;
}

.video-local-hint a {
  color: #DC2626;
  text-decoration: none;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.video-local-hint a:hover {
  text-decoration: underline;
}

.video-takeaway-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
  height: 100%;
}

.video-takeaway-box {
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 60%, #F1F5F9 100%);
  border: 1px solid var(--border-neutral);
  border-top: 1.5px solid #FFFFFF;
  border-radius: 14px;
  padding: 12px 14px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--text-muted);
  font-weight: 600;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  box-shadow: inset 0 1.5px 0.5px #FFFFFF, 0 4px 12px rgba(15, 23, 42, 0.04);
}

.video-takeaway-title {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ==========================================================================
   TUTOR CONTEXT & CHILD UNDERSTANDING CALLOUTS
   ========================================================================== */
.tutor-pro-callout {
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 60%, #F1F5F9 100%);
  border: 1px solid var(--border-neutral);
  border-top: 1.5px solid #FFFFFF;
  border-radius: 14px;
  padding: 14px 18px;
  margin-top: 14px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  box-shadow: inset 0 1.5px 0.5px #FFFFFF, 0 3px 10px rgba(15, 23, 42, 0.03);
}

.tutor-pro-callout img {
  width: 26px;
  height: 26px;
  object-fit: contain;
  flex-shrink: 0;
  filter: drop-shadow(0 2px 4px rgba(15, 23, 42, 0.08));
}

.tutor-callout-title {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--brand-indigo);
  margin-bottom: 3px;
}

.tutor-callout-text {
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-muted);
  font-weight: 600;
}

.note-section {
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-neutral);
}

.note-section:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.note-section-title {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--brand-indigo);
  margin-bottom: 4px;
}

/* ==========================================================================
   PEDAGOGICAL ELEVATION: INTERACTIVE QUESTS, XP, CODE TOOLS & SLIDE DOTS
   ========================================================================== */

/* Slide Dots Ribbon (Direct Slide Jumper) */
.slide-dots-ribbon {
  display: flex;
  align-items: center;
  gap: 8px;
}

.slide-dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-pill);
  background: linear-gradient(180deg, #FFFFFF 0%, #E2E8F0 60%, #CBD5E1 100%);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  border: 1px solid rgba(255, 255, 255, 0.9);
  padding: 0;
  box-shadow: inset 0 1px 0.5px #FFFFFF, inset 0 -1px 1px rgba(0, 0, 0, 0.06), 0 2px 4px rgba(0, 0, 0, 0.06);
}

.slide-dot:hover {
  transform: scale(1.25);
  box-shadow: inset 0 1px 0.5px #FFFFFF, 0 4px 8px rgba(15, 23, 42, 0.12);
}

.slide-dot.active {
  width: 28px;
  background: linear-gradient(180deg, #FF7E36 0%, #F4600C 50%, #4F46E5 100%);
  box-shadow: inset 0 1.5px 1px rgba(255, 255, 255, 0.8), 0 3px 10px rgba(79, 70, 229, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.6);
}

/* Predict & Hypothesize Hook Banner */
.predict-banner {
  background: linear-gradient(180deg, #EFF6FF 0%, #DBEAFE 50%, #BFDBFE 100%);
  border: 1px solid #93C5FD;
  border-top: 1.5px solid #FFFFFF;
  border-radius: var(--radius-btn);
  padding: 12px 18px;
  margin-top: 14px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: inset 0 1.5px 0.5px #FFFFFF, 0 3px 10px rgba(30, 64, 175, 0.08);
}

.predict-banner-icon {
  width: 24px;
  height: 24px;
  object-fit: contain;
  flex-shrink: 0;
  filter: drop-shadow(0 2px 4px rgba(30, 64, 175, 0.15));
}

.predict-banner-text {
  font-size: 13.5px;
  line-height: 1.45;
  color: #1E40AF;
  font-weight: 600;
}

.predict-banner-text strong {
  color: #1E3A8A;
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 14px;
}

/* Light-Mode Syntax Highlighting & Code Toolbar */
.code-header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.code-action-btn {
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 60%, #F1F5F9 100%);
  border: 1px solid var(--border-neutral);
  border-top: 1.5px solid #FFFFFF;
  color: var(--text-muted);
  font-family: 'Nunito', sans-serif;
  font-size: 11.5px;
  font-weight: 700;
  padding: 5px 11px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 5px;
  transition: all 0.15s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: inset 0 1.5px 0.5px #FFFFFF, 0 2px 0 #CBD5E1, 0 3px 6px rgba(15, 23, 42, 0.03);
}

.code-action-btn:hover {
  background: #FFFFFF;
  color: var(--text-main);
  border-color: #CBD5E1;
  transform: translateY(-1px);
  box-shadow: inset 0 1.5px 0.5px #FFFFFF, 0 3px 0 #94A3B8, 0 6px 12px rgba(15, 23, 42, 0.06);
}

.code-action-btn:active {
  transform: translateY(1.5px);
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.06), 0 1px 0 #94A3B8;
}

.code-action-btn.copied {
  background: linear-gradient(180deg, #ECFDF5 0%, #D1FAE5 100%);
  color: #047857;
  border-color: #A7F3D0;
  border-top: 1.5px solid #FFFFFF;
  box-shadow: inset 0 1.5px 0.5px #FFFFFF, 0 2px 0 #6EE7B7;
}

/* Syntax Tokens */
.tok-kw { color: #7C3AED; font-weight: 700; }
.tok-str { color: #059669; font-weight: 600; }
.tok-fn { color: #2563EB; font-weight: 600; }
.tok-num { color: #D97706; font-weight: 700; }
.tok-comm { color: #64748B; font-style: italic; }
.tok-tag { color: #DC2626; font-weight: 700; }
.tok-attr { color: #D97706; }

/* ==========================================================================
   CONTEXT-AWARE INTERACTIVE PEDAGOGICAL SANDBOX ENGINE
   ========================================================================== */
.sandbox-engine-card {
  display: none;
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 60%, #F1F5F9 100%);
  border: 1px solid rgba(226, 232, 240, 0.9);
  border-top: 1.5px solid #FFFFFF;
  border-radius: 14px;
  margin-top: 10px;
  overflow: hidden;
  box-shadow: inset 0 2px 1px 0 #FFFFFF, 0 4px 14px rgba(15, 23, 42, 0.05);
  animation: sandboxFadeIn 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes sandboxFadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.sandbox-engine-card.open {
  display: block;
}

.sandbox-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 16px;
  background: linear-gradient(180deg, #F8FAFC 0%, #EEF2F6 100%);
  border-bottom: 1px solid #E2E8F0;
  border-top: 1px solid #FFFFFF;
}

.sandbox-title-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-weight: 700;
  font-size: 13px;
  color: var(--text-main);
}

.sandbox-live-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #10B981;
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.25);
}

.sandbox-hint {
  font-size: 11px;
  font-weight: 700;
  color: #64748B;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Sandbox Interactive Knobs Bar */
.sandbox-knobs-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  padding: 10px 16px;
  background: #FFFFFF;
  border-bottom: 1px solid #E2E8F0;
  font-size: 12.5px;
}

.sandbox-knob {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  color: #475569;
}

.color-presets {
  display: flex;
  align-items: center;
  gap: 6px;
}

.color-chip {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid #FFFFFF;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
  cursor: pointer;
  transition: transform 0.15s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.15s;
}

.color-chip:hover {
  transform: scale(1.15);
}

.color-chip.active {
  box-shadow: 0 0 0 2px #4F46E5, 0 2px 4px rgba(0, 0, 0, 0.2);
  transform: scale(1.1);
}

.sandbox-slider {
  accent-color: #4F46E5;
  cursor: pointer;
  height: 6px;
}

.knob-val {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11.5px;
  color: #4F46E5;
  background: #EEF2FF;
  padding: 2px 6px;
  border-radius: 6px;
}

.sandbox-input {
  padding: 6px 10px;
  border-radius: 8px;
  border: 1px solid #CBD5E1;
  font-family: inherit;
  font-size: 12.5px;
  outline: none;
  background: #FFFFFF;
  color: var(--text-main);
  transition: border-color 0.15s;
}

.sandbox-input:focus {
  border-color: #4F46E5;
  box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.1);
}

/* Stage 1: Live Visual DOM Preview Stage */
.sandbox-preview-stage {
  padding: 20px;
  background: linear-gradient(180deg, #F8FAFC 0%, #EDF2F7 100%);
}

.sandbox-interactive-card {
  border: 1px solid rgba(226, 232, 240, 0.9);
  border-top: 1.5px solid #FFFFFF;
  box-shadow: inset 0 2px 1px 0 #FFFFFF, 0 4px 12px rgba(15, 23, 42, 0.06);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Stage 2: Real Computed Logic Output Console (Light Mode) */
.sandbox-console-output {
  background: linear-gradient(180deg, #F8FAFC 0%, #F1F5F9 100%);
  color: #1E293B;
  padding: 14px 18px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12.5px;
  line-height: 1.6;
  border-top: 1px solid #CBD5E1;
}

.console-line {
  margin-bottom: 4px;
}

.console-prompt-sym {
  color: #4F46E5;
  font-weight: 800;
  margin-right: 6px;
}

.console-output-text {
  color: #047857;
  font-weight: 700;
}

.console-meta-row {
  display: flex;
  justify-content: space-between;
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px solid #E2E8F0;
  font-size: 11px;
  color: #64748B;
}

.console-status-pill {
  color: #059669;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 5px;
}

/* Stage 3: Cyber Defenders Web Crypto Workbench */
.sandbox-crypto-tool {
  padding: 16px;
  background: #FFFFFF;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.crypto-field-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.crypto-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
}

.hash-result-box {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  word-break: break-all;
  background: #F1F5F9;
  border: 1px solid #CBD5E1;
  padding: 10px 14px;
  border-radius: 8px;
  color: #0F172A;
  font-weight: 700;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.05);
}

/* Stage 4: Generative AI Prompt Workbench */
.sandbox-prompt-tool {
  padding: 16px;
  background: #FFFFFF;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.prompt-chips-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.prompt-chip {
  padding: 6px 12px;
  border-radius: 999px;
  background: #EEF2FF;
  border: 1px solid #C7D2FE;
  font-size: 12px;
  font-weight: 700;
  color: #4338CA;
  cursor: pointer;
  transition: all 0.15s cubic-bezier(0.16, 1, 0.3, 1);
}

.prompt-chip:hover {
  background: #E0E7FF;
}

.prompt-chip.active {
  background: #4F46E5;
  color: #FFFFFF;
  border-color: #4F46E5;
  box-shadow: 0 2px 6px rgba(79, 70, 229, 0.25);
}

.prompt-output-preview {
  background: linear-gradient(180deg, #F8FAFC 0%, #F1F5F9 100%);
  border: 1px solid #CBD5E1;
  border-radius: 12px;
  padding: 14px;
  margin-top: 6px;
}

.prompt-preview-title {
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  color: #64748B;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}

.prompt-compiled-text {
  font-family: 'Nunito', sans-serif;
  font-weight: 700;
  font-size: 13.5px;
  color: #1E293B;
  line-height: 1.5;
}

/* Stage 5: Early Explorer & Block Algorithm Sequence Player */
.sandbox-step-player {
  padding: 18px;
  background: #FFFFFF;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.step-nodes-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.step-node {
  padding: 10px 16px;
  border-radius: 12px;
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
  border: 1px solid #E2E8F0;
  border-top: 1.5px solid #FFFFFF;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 2px 4px rgba(15, 23, 42, 0.04);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.step-node.active {
  background: linear-gradient(180deg, #FEF3C7 0%, #FDE68A 100%);
  border-color: #F59E0B;
  color: #92400E;
  transform: scale(1.06);
  box-shadow: 0 4px 14px rgba(245, 158, 11, 0.25);
}

.step-play-btn {
  align-self: flex-start;
  padding: 10px 20px;
  border-radius: 12px;
  background: linear-gradient(180deg, #FF7E36 0%, #F4600C 100%);
  color: #FFFFFF;
  font-family: 'Nunito', sans-serif;
  font-weight: 800;
  font-size: 13px;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 3px 0 #9A3412, 0 6px 14px rgba(244, 96, 12, 0.25);
  transition: all 0.12s cubic-bezier(0.16, 1, 0.3, 1);
}

.step-play-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 0 #9A3412, 0 10px 20px rgba(244, 96, 12, 0.3);
}

.step-play-btn:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 #9A3412;
}

.step-play-btn svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  stroke-width: 2.5;
  fill: none;
}

/* Driver vs Navigator Mentoring Roles on Slide 3 */
.copilot-roles {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 8px;
}

.role-badge-box {
  border-radius: 10px;
  padding: 8px 12px;
  font-size: 12px;
  line-height: 1.4;
  border-top: 1.5px solid #FFFFFF;
  box-shadow: inset 0 1.5px 0.5px #FFFFFF, 0 2px 6px rgba(15, 23, 42, 0.03);
}

.role-badge-box.driver {
  background: linear-gradient(180deg, #F0FDF4 0%, #DCFCE7 60%, #BBF7D0 100%);
  border: 1px solid #86EFAC;
  color: #166534;
}

.role-badge-box.navigator {
  background: linear-gradient(180deg, #EFF6FF 0%, #DBEAFE 60%, #BFDBFE 100%);
  border: 1px solid #93C5FD;
  color: #1E40AF;
}

.role-badge-title {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-weight: 700;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 3px;
  display: flex;
  align-items: center;
  gap: 5px;
}

/* Interactive Quests with XP Gamification */
.quest-total-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 60%, #F1F5F9 100%);
  border: 1px solid var(--border-neutral);
  border-top: 1.5px solid #FFFFFF;
  border-radius: 14px;
  padding: 10px 18px;
  margin-bottom: 12px;
  box-shadow: inset 0 1.5px 0.5px #FFFFFF, 0 3px 8px rgba(15, 23, 42, 0.03);
}

.quest-xp-counter {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 16px;
  font-weight: 700;
  color: var(--brand-orange);
  display: flex;
  align-items: center;
  gap: 6px;
  text-shadow: 0 1px 2px rgba(244, 96, 12, 0.15);
}

.quest-tier.completed {
  background: linear-gradient(180deg, #F0FDF4 0%, #DCFCE7 50%, #BBF7D0 100%);
  border: 1px solid #86EFAC;
  border-top: 1.5px solid #FFFFFF;
  box-shadow: inset 0 2px 1px 0 #FFFFFF, 0 3px 0 #4ADE80, 0 8px 18px rgba(16, 185, 129, 0.18);
}

.quest-tier.completed .quest-title {
  color: #166534;
}

.quest-checkbox-interactive {
  width: 24px;
  height: 24px;
  border-radius: 7px;
  border: 2px solid var(--border-neutral);
  border-top: 2px solid #FFFFFF;
  background: linear-gradient(180deg, #FFFFFF 0%, #F1F5F9 100%);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.15s cubic-bezier(0.16, 1, 0.3, 1);
  margin-left: auto;
  box-shadow: inset 0 1px 1px #FFFFFF, 0 2px 4px rgba(15, 23, 42, 0.04);
}

.quest-tier.completed .quest-checkbox-interactive {
  background: linear-gradient(180deg, #34D399 0%, #10B981 60%, #059669 100%);
  border-color: #059669;
  box-shadow: inset 0 1.5px 0.5px rgba(255, 255, 255, 0.6), 0 2px 4px rgba(16, 185, 129, 0.3);
}

.quest-checkbox-interactive svg {
  width: 14px;
  height: 14px;
  stroke: white;
  stroke-width: 3;
  fill: none;
  opacity: 0;
  transform: scale(0.5);
  transition: all 0.15s cubic-bezier(0.16, 1, 0.3, 1);
}

.quest-tier.completed .quest-checkbox-interactive svg {
  opacity: 1;
  transform: scale(1);
}

.quest-xp-pill {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 12px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: var(--radius-pill);
  background: linear-gradient(180deg, #FFFBEB 0%, #FEF3C7 60%, #FDE68A 100%);
  color: #B45309;
  border: 1px solid #FDE68A;
  border-top: 1px solid #FFFFFF;
  margin-right: 8px;
  box-shadow: inset 0 1px 0.5px #FFFFFF, 0 2px 4px rgba(180, 83, 9, 0.08);
}

/* Socratic Checkpoint Challenge Retry Button */
.quiz-retry-btn {
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 50%, #EDF2F7 100%);
  border: 1px solid var(--border-neutral);
  border-top: 1.5px solid #FFFFFF;
  color: var(--text-muted);
  font-family: 'Nunito', sans-serif;
  font-size: 12px;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 8px;
  cursor: pointer;
  margin-top: 10px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: inset 0 1.5px 0.5px #FFFFFF, 0 2px 0 #CBD5E1, 0 3px 6px rgba(15, 23, 42, 0.03);
}

.quiz-retry-btn:hover {
  background: #FFFFFF;
  color: var(--text-main);
  border-color: #CBD5E1;
  transform: translateY(-1px);
  box-shadow: inset 0 1.5px 0.5px #FFFFFF, 0 3px 0 #94A3B8, 0 6px 10px rgba(15, 23, 42, 0.06);
}

.quiz-retry-btn:active {
  transform: translateY(1.5px);
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.06), 0 1px 0 #94A3B8;
}

/* Confetti Particle Animation (Zero External Dependencies) */
.confetti-particle {
  position: fixed;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  pointer-events: none;
  z-index: 9999;
  animation: confettiDrop 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

@keyframes confettiDrop {
  0% {
    opacity: 1;
    transform: translateY(0) rotate(0deg) scale(1);
  }
  100% {
    opacity: 0;
    transform: translateY(220px) rotate(480deg) scale(0.6);
  }
}

/* Print Stylesheet (@media print) for Printable Student Mission Cards */
@media print {
  header.slide-header,
  footer.slide-footer,
  .notes-drawer,
  .header-controls,
  .video-local-hint,
  .tool-launch-btn,
  .video-launch-btn,
  .code-action-btn,
  .quiz-btn,
  .quiz-retry-btn {
    display: none !important;
  }

  body {
    background: #FFFFFF !important;
    color: #000000 !important;
    overflow: visible !important;
    height: auto !important;
  }

  main.slide-viewport {
    padding: 0 !important;
    display: block !important;
  }

  .slide {
    display: block !important;
    max-width: 100% !important;
    height: auto !important;
    max-height: none !important;
    border: 1px solid #CBD5E1 !important;
    border-radius: 12px !important;
    margin-bottom: 24px !important;
    page-break-inside: avoid !important;
    box-shadow: none !important;
    padding: 24px !important;
  }

  .slide:not(.active) {
    display: block !important;
  }
}

/* ==========================================================================
   CORRELATED SANDBOX & CODER TAKE-HOME MISSION STYLING
   ========================================================================== */

/* 1. Dynamic Rendered HTML Stage */
.sandbox-rendered-html-card {
  transition: all 0.15s ease;
  line-height: 1.6;
}
.sandbox-rendered-html-card h1 {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 1.7em;
  margin: 0 0 8px 0;
  color: inherit;
  line-height: 1.25;
}
.sandbox-rendered-html-card h2 {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 1.35em;
  margin: 0 0 6px 0;
  color: inherit;
  line-height: 1.3;
}
.sandbox-rendered-html-card h3 {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 1.15em;
  margin: 0 0 6px 0;
  color: inherit;
}
.sandbox-rendered-html-card p {
  font-size: 1em;
  line-height: 1.55;
  margin: 0 0 10px 0;
  color: inherit;
}
.sandbox-rendered-html-card ul, .sandbox-rendered-html-card ol {
  margin: 0 0 10px 0;
  padding-left: 24px;
  font-size: 1em;
  color: inherit;
}
.sandbox-rendered-html-card li {
  margin-bottom: 4px;
}
.sandbox-rendered-html-card button {
  background: #4F46E5;
  color: #FFFFFF;
  border: none;
  border-radius: 8px;
  padding: 8px 18px;
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(79, 70, 229, 0.2);
}
.sandbox-rendered-html-card a {
  color: #2563EB;
  text-decoration: underline;
  font-weight: 600;
}

/* 2. Interactive Knobs Buttons */
.sandbox-knob-btn {
  background: #FFFFFF;
  border: 1px solid #CBD5E1;
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 11.5px;
  font-weight: 700;
  color: #475569;
  cursor: pointer;
  transition: all 0.15s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}
.sandbox-knob-btn:hover {
  background: #F1F5F9;
  border-color: #94A3B8;
  color: #1E293B;
}
.sandbox-knob-btn.active {
  background: #EEF2FF;
  border-color: #4F46E5;
  color: #4F46E5;
  font-weight: 800;
  box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.15);
}

/* 3. Dynamic Flexbox Stage */
.sandbox-flex-container {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 16px;
  background: #F8FAFC;
  border: 1.5px dashed #94A3B8;
  border-radius: 12px;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  min-height: 80px;
  align-items: center;
}
.sandbox-flex-item {
  background: linear-gradient(180deg, #FFFFFF 0%, #EEF2FF 100%);
  border: 1px solid #C7D2FE;
  border-radius: 8px;
  padding: 10px 18px;
  font-weight: 800;
  font-size: 13px;
  color: #4338CA;
  box-shadow: 0 2px 6px rgba(79, 70, 229, 0.08);
}

/* 4. Dynamic Grid Stage */
.sandbox-grid-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  padding: 16px;
  background: #F8FAFC;
  border: 1.5px dashed #94A3B8;
  border-radius: 12px;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}
.sandbox-grid-item {
  background: linear-gradient(180deg, #FFFFFF 0%, #F1F5F9 100%);
  border: 1px solid #CBD5E1;
  border-radius: 10px;
  padding: 14px;
  font-size: 13px;
  font-weight: 700;
  color: #1E293B;
  box-shadow: 0 2px 4px rgba(15, 23, 42, 0.05);
}

/* 5. Dynamic Box Model Stage */
.sandbox-boxmodel-margin {
  background: #FEF3C7;
  border: 1.5px dashed #F59E0B;
  padding: 14px;
  border-radius: 14px;
  text-align: center;
  font-size: 11px;
  font-weight: 700;
  color: #B45309;
  transition: all 0.2s ease;
}
.sandbox-boxmodel-padding {
  background: #D1FAE5;
  border: 1.5px dashed #10B981;
  padding: 16px;
  border-radius: 10px;
  color: #047857;
  transition: all 0.2s ease;
}
.sandbox-boxmodel-content {
  background: #FFFFFF;
  border: 2px solid #4F46E5;
  padding: 14px;
  border-radius: 8px;
  color: #1E293B;
  font-weight: 800;
  font-size: 13px;
}

/* 6. Dynamic DOM Machine Stage */
.sandbox-dom-machine {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 18px;
  background: #FFFFFF;
}
.dom-interactive-btn {
  background: linear-gradient(180deg, #4F46E5 0%, #4338CA 100%);
  color: #FFFFFF;
  border: none;
  border-radius: 10px;
  padding: 10px 20px;
  font-weight: 800;
  font-size: 13.5px;
  cursor: pointer;
  align-self: flex-start;
  box-shadow: 0 3px 0 #312E81, 0 4px 10px rgba(79, 70, 229, 0.25);
  transition: all 0.12s cubic-bezier(0.16, 1, 0.3, 1);
}
.dom-interactive-btn:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 #312E81;
}
.dom-stat-row {
  display: flex;
  align-items: center;
  gap: 16px;
}
.dom-stat-counter {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  font-weight: 700;
  color: #4F46E5;
  background: #EEF2FF;
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid #C7D2FE;
}
.dom-event-log {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  font-weight: 700;
  background: #F0FDF4;
  color: #166534;
  border: 1px solid #86EFAC;
  padding: 8px 12px;
  border-radius: 8px;
}

/* 7. Dedicated Coder Take-Home Mission Card */
.take-home-card {
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 60%, #F1F5F9 100%);
  border: 1.5px solid #CBD5E1 !important;
  border-radius: 16px;
  padding: 20px 22px;
  box-shadow: inset 0 2px 1px #FFFFFF, 0 4px 16px rgba(15, 23, 42, 0.05);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.take-home-badge {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 11.5px;
  font-weight: 700;
  color: #047857;
  background: linear-gradient(180deg, #ECFDF5 0%, #D1FAE5 100%);
  border: 1px solid #A7F3D0;
  border-top: 1.5px solid #FFFFFF;
  padding: 4px 10px;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  box-shadow: inset 0 1px 0.5px #FFFFFF, 0 2px 4px rgba(4, 120, 87, 0.08);
}
.take-home-challenge-box {
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
  border: 1.5px solid #E2E8F0;
  border-radius: 12px;
  padding: 10px 14px;
  font-size: 13px;
  line-height: 1.45;
  color: var(--text-main);
  box-shadow: inset 0 1px 0 #FFFFFF, 0 2px 4px rgba(15, 23, 42, 0.04);
}
.take-home-steps {
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.take-home-step-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 12.5px;
  color: var(--text-muted);
  line-height: 1.4;
}
.take-home-step-item .step-badge {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #EEF2FF;
  color: #4F46E5;
  font-weight: 800;
  font-size: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
  border: 1px solid #C7D2FE;
}
.take-home-footer-note {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11.5px;
  font-weight: 700;
  color: #4F46E5;
  background: #EEF2FF;
  border: 1px solid #C7D2FE;
  border-radius: 8px;
  padding: 6px 10px;
  margin-top: 4px;
}

/* 8. CIA Triad Threat Defense Simulator */
.cia-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.sandbox-threat-selector {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: #F8FAFC;
  border: 1px solid #E2E8F0;
  border-radius: 12px;
  padding: 12px 14px;
}
.threat-label {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 12px;
  font-weight: 700;
  color: #475569;
  letter-spacing: 0.02em;
}
.threat-scenario-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.threat-chip {
  background: #FFFFFF;
  border: 1.5px solid #CBD5E1;
  border-radius: 8px;
  padding: 6px 12px;
  font-family: 'Nunito', sans-serif;
  font-size: 12px;
  font-weight: 700;
  color: #334155;
  cursor: pointer;
  transition: all 0.15s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}
.threat-chip:hover {
  background: #F1F5F9;
  border-color: #94A3B8;
  color: #1E293B;
}
.threat-chip.active {
  background: #EEF2FF;
  border-color: #4F46E5;
  color: #4F46E5;
  font-weight: 800;
  box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.15);
}
.cia-triad-status-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
@media (max-width: 768px) {
  .cia-triad-status-grid {
    grid-template-columns: 1fr;
  }
}
.triad-pillar-card {
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
  border: 1.5px solid #CBD5E1;
  border-radius: 12px;
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 2px 4px rgba(15, 23, 42, 0.04);
}
.triad-pillar-card.breached {
  background: linear-gradient(180deg, #FFFFFF 0%, #FFF5F5 100%);
  border-color: #F87171;
  box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.15), 0 2px 6px rgba(239, 68, 68, 0.08);
}
.triad-pillar-card.secure {
  background: linear-gradient(180deg, #FFFFFF 0%, #F0FDF4 100%);
  border-color: #86EFAC;
  box-shadow: 0 0 0 1px rgba(34, 197, 94, 0.1);
}
.pillar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.pillar-name {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 13px;
  font-weight: 800;
  color: #1E293B;
}
.pillar-badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 6px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.badge-breached {
  background: #FEF2F2;
  border: 1px solid #FECACA;
  color: #DC2626;
}
.badge-secure {
  background: #ECFDF5;
  border: 1px solid #A7F3D0;
  color: #059669;
}
.pillar-rule {
  font-size: 11.5px;
  color: #475569;
  line-height: 1.4;
}
.pillar-defense {
  font-size: 11px;
  font-weight: 700;
  color: #4F46E5;
  background: #EEF2FF;
  border: 1px solid #C7D2FE;
  border-radius: 6px;
  padding: 4px 8px;
  margin-top: 4px;
}
.threat-analysis-summary {
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
  border: 1.5px solid #E2E8F0;
  border-radius: 12px;
  padding: 14px 16px;
  font-size: 12.5px;
  line-height: 1.5;
  color: #1E293B;
  box-shadow: inset 0 1px 0 #FFFFFF, 0 2px 4px rgba(15, 23, 42, 0.04);
}
.threat-analysis-summary strong {
  color: #1E293B;
}

/* 9. Slide 3 Balanced 2-Column Co-Pilot & Live Code Workbench */
.copilot-workbench-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  margin-top: 6px;
}

.copilot-workbench-grid > * {
  min-width: 0;
}

@media (max-width: 960px) {
  .copilot-workbench-grid {
    grid-template-columns: 1fr;
  }
}

.copilot-workbench-grid .copilot-list {
  margin-top: 0;
  gap: 6px;
}

.copilot-workbench-grid .copilot-item {
  padding: 8px 12px;
  gap: 10px;
  border-radius: 12px;
}

.copilot-workbench-grid .step-number {
  width: 24px;
  height: 24px;
  font-size: 12.5px;
}

.copilot-workbench-grid .step-title {
  font-size: 13.5px;
  margin-bottom: 2px;
}

.copilot-workbench-grid .step-desc {
  font-size: 12px;
  line-height: 1.35;
}

.copilot-workbench-grid .step-action-tag {
  font-size: 10.5px;
  padding: 2px 6px;
  margin-top: 3px;
  border-radius: 6px;
  gap: 4px;
}

.copilot-workbench-grid .code-container {
  margin-top: 0;
}

/* 10. Slide 2 Visual Architecture & Mental Model Pipeline Card */
.architecture-blueprint-card {
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 65%, #F1F5F9 100%);
  border: 1.5px solid #CBD5E1;
  border-top: 2px solid #FFFFFF;
  border-radius: 18px;
  padding: 18px 22px;
  margin-top: 6px;
  box-shadow: inset 0 2px 1px #FFFFFF, 0 6px 18px rgba(15, 23, 42, 0.04);
}

.arch-header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  flex-wrap: wrap;
  gap: 8px;
}

.arch-title {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 15px;
  font-weight: 700;
  color: var(--brand-indigo);
  display: flex;
  align-items: center;
  gap: 8px;
}

.arch-pipeline-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 10px;
  align-items: center;
}

@media (max-width: 820px) {
  .arch-pipeline-row {
    grid-template-columns: 1fr;
  }
  .arch-arrow {
    display: none;
  }
}

.arch-stage-box {
  background: #FFFFFF;
  border: 1px solid #CBD5E1;
  border-top: 1.5px solid #FFFFFF;
  border-radius: 12px;
  padding: 12px 14px;
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.03);
}

.arch-stage-tag {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: #4F46E5;
  background: #EEF2FF;
  border: 1px solid #C7D2FE;
  padding: 2px 8px;
  border-radius: 6px;
  display: inline-block;
  margin-bottom: 5px;
}

.arch-stage-title {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 13.5px;
  font-weight: 700;
  color: #1E293B;
  margin-bottom: 3px;
}

.arch-stage-desc {
  font-size: 12px;
  color: #475569;
  line-height: 1.4;
  font-weight: 600;
}

.arch-arrow {
  font-family: 'Fredoka', sans-serif;
  font-size: 18px;
  font-weight: 800;
  color: #6366F1;
  background: #EEF2FF;
  border: 1px solid #C7D2FE;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}



/* ========================================================
   STEMULUS SOCRATIC AGENT SYNTHESIS: MISSION & GLOSSARY DRAWERS
   Modeled after Matt Pocock's teach & glossary formats
   ======================================================== */

.mission-btn, .glossary-btn {
  background: #FFFFFF;
  border: 1px solid #CBD5E1;
  color: #334155;
}

.mission-btn:hover {
  background: #FEF3C7;
  border-color: #F59E0B;
  color: #92400E;
}

.glossary-btn:hover {
  background: #EEF2FF;
  border-color: #6366F1;
  color: #3730A3;
}

.code-action-btn.verify-btn {
  background: linear-gradient(180deg, #FFFFFF 0%, #F0FDF4 100%);
  border-color: #86EFAC;
  color: #166534;
}

.code-action-btn.verify-btn:hover {
  background: #DCFCE7;
  border-color: #22C55E;
  color: #15803D;
}

.code-action-btn.verify-btn.verified {
  background: #22C55E;
  border-color: #16A34A;
  color: #FFFFFF;
}

.solution-verification-feedback {
  margin-top: 10px;
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 13px;
  line-height: 1.5;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  transition: all 0.3s ease;
}

.solution-verification-feedback.success {
  background: #F0FDF4;
  border: 1.5px solid #86EFAC;
  color: #166534;
}

.solution-verification-feedback.hint {
  background: #FFFBEB;
  border: 1.5px solid #FCD34D;
  color: #92400E;
}

.learning-journey-drawer, .glossary-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: 480px;
  max-width: 92vw;
  height: 100vh;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(28px);
  -webkit-backdrop-filter: blur(28px);
  border: 1.5px solid rgba(226, 232, 240, 0.95);
  box-shadow: -16px 0 48px rgba(15, 23, 42, 0.16);
  z-index: 1001;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.learning-journey-drawer.open, .glossary-drawer.open {
  transform: translateX(0);
}

.drawer-header {
  padding: 18px 24px;
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
  border-bottom: 1.5px solid #E2E8F0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.drawer-title-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.drawer-icon-3d {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.drawer-headline {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 17px;
  font-weight: 700;
  color: #1E293B;
  line-height: 1.2;
}

.drawer-subline {
  font-size: 12px;
  color: #64748B;
  font-weight: 600;
}

.drawer-close-btn {
  background: #F1F5F9;
  border: 1px solid #CBD5E1;
  color: #475569;
  font-size: 20px;
  line-height: 1;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.drawer-close-btn:hover {
  background: #E2E8F0;
  color: #0F172A;
}

.drawer-body {
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.journey-mission-box {
  background: linear-gradient(135deg, #FEF3C7 0%, #FFFBEB 100%);
  border: 1.5px solid #FCD34D;
  border-radius: 14px;
  padding: 16px;
}

.journey-section-tag {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: #92400E;
  margin-bottom: 4px;
}

.journey-mission-title {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 16px;
  font-weight: 700;
  color: #78350F;
  margin-bottom: 6px;
}

.journey-mission-desc {
  font-size: 13px;
  color: #92400E;
  line-height: 1.45;
  font-weight: 600;
}

.zpd-meter-card {
  background: #FFFFFF;
  border: 1.5px solid #E2E8F0;
  border-radius: 12px;
  padding: 14px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.zpd-metric {
  text-align: center;
}

.zpd-val {
  font-family: 'Fredoka', sans-serif;
  font-size: 20px;
  font-weight: 800;
  color: #4F46E5;
}

.zpd-lbl {
  font-size: 11px;
  font-weight: 700;
  color: #64748B;
  text-transform: uppercase;
}

.learning-record-item {
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 10px;
  padding: 12px 14px;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
}

.record-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 4px;
}

.record-badge {
  font-family: 'Fredoka', sans-serif;
  font-size: 10px;
  font-weight: 800;
  background: #DCFCE7;
  color: #166534;
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid #86EFAC;
}

.record-title {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 13.5px;
  font-weight: 700;
  color: #1E293B;
  margin-bottom: 3px;
}

.record-evidence {
  font-size: 12px;
  color: #475569;
  line-height: 1.4;
}

.record-date {
  font-size: 11px;
  color: #94A3B8;
  font-weight: 600;
}

.glossary-term-card {
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 12px;
  padding: 14px;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
}

.glossary-term-name {
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 15px;
  font-weight: 700;
  color: #4F46E5;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.glossary-def-is {
  font-size: 13px;
  color: #1E293B;
  line-height: 1.45;
  font-weight: 600;
  margin-bottom: 6px;
}

.glossary-avoid {
  font-size: 11.5px;
  color: #DC2626;
  background: #FEF2F2;
  border: 1px solid #FECACA;
  padding: 4px 8px;
  border-radius: 6px;
  font-weight: 600;
}

.export-journey-btn {
  background: linear-gradient(180deg, #4F46E5 0%, #4338CA 100%);
  color: #FFFFFF;
  border: none;
  border-radius: 10px;
  padding: 12px 18px;
  font-family: 'Fredoka', 'Nunito', sans-serif;
  font-size: 13.5px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
  transition: all 0.2s ease;
  margin-top: auto;
}

.export-journey-btn:hover {
  background: linear-gradient(180deg, #4338CA 0%, #3730A3 100%);
  transform: translateY(-1px);
}

/* ==========================================================================
   TACTILE NEXT LESSON NAVIGATION RIBBON (CONTINUOUS LEARNING FLOW)
   ========================================================================== */
.next-lesson-ribbon {
  margin-top: auto;
  padding: 10px 0 2px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  width: 100%;
}

.next-lesson-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.btn-next-lesson {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 20px;
  background: linear-gradient(180deg, #BAE6FD 0%, #38BDF8 100%);
  color: #0369A1;
  font-family: 'Nunito', system-ui, sans-serif;
  font-size: 13.5px;
  font-weight: 800;
  border: 1px solid #7DD3FC;
  border-radius: 12px;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.7) inset, 0 3px 0 #0284C7, 0 6px 14px rgba(56, 189, 248, 0.28);
  transition: all 0.15s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-next-lesson:hover {
  background: linear-gradient(180deg, #E0F2FE 0%, #38BDF8 100%);
  transform: translateY(-1px);
  color: #0284C7;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.8) inset, 0 4px 0 #0284C7, 0 8px 18px rgba(56, 189, 248, 0.35);
}

.btn-next-lesson:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.4) inset, 0 1px 0 #0284C7;
}

.btn-next-lesson svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  stroke-width: 2.5;
  fill: none;
  transition: transform 0.15s ease;
}

.btn-next-lesson:hover svg {
  transform: translateX(3px);
}

/* ==========================================================================
   CUTTING-EDGE $20M TECH ACADEMY UPGRADES: COMMAND PALETTE & MONACO VIEWPORT
   ========================================================================== */

/* Universal Command Palette (Ctrl+K / Cmd+K) */
.command-palette-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.48);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 9999;
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding-top: 12vh;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.command-palette-backdrop.open {
  display: flex;
  opacity: 1;
  pointer-events: auto;
}

.command-palette-modal {
  background: #FFFFFF;
  width: 100%;
  max-width: 600px;
  border-radius: 18px;
  border: 1px solid #E2E8F0;
  box-shadow: 0 25px 60px -15px rgba(15, 23, 42, 0.25), 0 0 0 1px rgba(15, 23, 42, 0.04);
  overflow: hidden;
  transform: scale(0.96) translateY(-10px);
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
}

.command-palette-backdrop.open .command-palette-modal {
  transform: scale(1) translateY(0);
}

.command-palette-search {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid #E2E8F0;
  background: #FAFCFF;
}

.command-palette-search svg {
  width: 18px;
  height: 18px;
  stroke: #64748B;
  stroke-width: 2.2;
  fill: none;
  flex-shrink: 0;
}

.command-palette-input {
  border: none;
  outline: none;
  background: transparent;
  font-family: 'Nunito', system-ui, sans-serif;
  font-size: 15.5px;
  font-weight: 600;
  color: #0F172A;
  width: 100%;
}

.command-palette-input::placeholder {
  color: #94A3B8;
}

.command-kbd-badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  background: #E2E8F0;
  color: #475569;
  padding: 3px 7px;
  border-radius: 6px;
  font-weight: 700;
  border: 1px solid #CBD5E1;
  cursor: pointer;
}

.command-palette-results {
  max-height: 380px;
  overflow-y: auto;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.command-group-title {
  font-size: 11px;
  font-weight: 800;
  color: #94A3B8;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 10px 14px 4px;
}

.command-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-radius: 10px;
  cursor: pointer;
  color: #1E293B;
  text-decoration: none;
  transition: all 0.12s ease;
}

.command-item:hover,
.command-item.selected {
  background: #F0F9FF;
  color: #0284C7;
}

.command-item-left {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13.5px;
  font-weight: 700;
}

.command-item-left svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
  flex-shrink: 0;
}

.command-shortcut {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  background: #F1F5F9;
  color: #64748B;
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid #E2E8F0;
}

.command-palette-footer {
  padding: 10px 18px;
  background: #F8FAFC;
  border-top: 1px solid #E2E8F0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: #64748B;
  font-weight: 600;
}

/* Header Spotlight Button */
.spotlight-trigger-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 10px;
  font-family: 'Nunito', sans-serif;
  font-size: 12.5px;
  font-weight: 700;
  color: #64748B;
  cursor: pointer;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
  transition: all 0.15s ease;
}

.spotlight-trigger-btn:hover {
  background: #F8FAFC;
  border-color: #CBD5E1;
  color: #0284C7;
}

/* ==========================================================================
   GLOBAL CURRICULUM INTELLIGENCE & INTERNATIONAL STANDARDS (NODES 1-5)
   Silicon Valley / European EdTech Caliber Styling
   Strict Light Mode • WCAG AAA • Zero Scrollbars • High-Fidelity Geometry
   ========================================================================== */

.global-horizon-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: #F0FDF4;
  border: 1px solid #BBF7D0;
  border-radius: 999px;
  padding: 4px 12px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 700;
  color: #15803D;
  letter-spacing: 0.02em;
  box-shadow: 0 1px 2px rgba(22, 101, 52, 0.04);
}

.global-horizon-badge svg {
  width: 13px;
  height: 13px;
  stroke: #16A34A;
  stroke-width: 2;
  fill: none;
}

.global-telemetry-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 6px;
}

.global-telemetry-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #F8FAFC;
  border: 1px solid #E2E8F0;
  border-radius: 6px;
  padding: 3px 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 600;
  color: #475569;
}

.global-telemetry-chip .chip-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #10B981;
}

.global-context-banner {
  display: flex;
  align-items: center;
  gap: 14px;
  background: #F8FAFC;
  border: 1px solid #E2E8F0;
  border-left: 4px solid #0284C7;
  border-radius: 10px;
  padding: 10px 16px;
  margin: 10px 0 14px 0;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.03);
}

.global-context-icon {
  width: 32px;
  height: 32px;
  background: #E0F2FE;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.global-context-icon svg {
  width: 18px;
  height: 18px;
  stroke: #0284C7;
  stroke-width: 2;
  fill: none;
}

.global-context-text {
  font-size: 13px;
  line-height: 1.45;
  color: #334155;
  flex: 1;
}

.global-context-text strong {
  color: #0F172A;
  font-weight: 700;
}

.global-system-card {
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 12px;
  padding: 16px 20px;
  box-shadow: 0 1px 4px rgba(15, 23, 42, 0.04);
}

.global-changemaker-ribbon {
  display: flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(90deg, #F0F9FF 0%, #EEF2FF 100%);
  border: 1px solid #BAE6FD;
  border-radius: 8px;
  padding: 5px 12px;
  margin-top: 6px;
}

.global-changemaker-ribbon svg {
  width: 16px;
  height: 16px;
  stroke: #0284C7;
  stroke-width: 2;
  fill: none;
  flex-shrink: 0;
}

.global-changemaker-text {
  font-size: 11.5px;
  color: #1E293B;
  line-height: 1.35;
}

.global-changemaker-text strong {
  color: #0369A1;
}

/* Slide 6 Snug Geometry Optimization */
.slide:has(.next-lesson-ribbon) .content-grid {
  margin-top: 8px !important;
}

.slide:has(.next-lesson-ribbon) .card {
  padding: 10px 14px !important;
}

.slide:has(.next-lesson-ribbon) .take-home-steps {
  margin: 6px 0 !important;
  gap: 4px !important;
}

.slide:has(.next-lesson-ribbon) .take-home-challenge-box {
  padding: 6px 10px !important;
  font-size: 12px !important;
  margin: 6px 0 !important;
}

.slide:has(.next-lesson-ribbon) .next-lesson-ribbon {
  padding: 6px 0 2px !important;
  gap: 6px !important;
}

/* ==========================================================================
   FLUID RESPONSIVE SYSTEM (DESKTOP, TABLET & MOBILE)
   ========================================================================== */

/* 1. Large Tablets & Small Laptops (< 1120px) */
@media (max-width: 1120px) {
  header.slide-header {
    padding: 0 14px;
    gap: 8px;
  }
  .brand-text {
    display: none;
  }
  .lesson-tag {
    max-width: 220px;
    font-size: 11.5px;
  }
  .ctrl-btn:not(.tutor-btn):not(.mission-btn) span {
    display: none;
  }
  .ctrl-btn {
    padding: 6px 8px;
  }
}

/* 2. Standard Tablets (< 860px) */
@media (max-width: 860px) {
  body {
    height: auto;
    min-height: 100vh;
    overflow-y: auto;
    padding-bottom: 12px;
  }
  header.slide-header {
    height: 54px;
    min-height: 54px;
    padding: 0 12px;
  }
  .lesson-tag {
    max-width: 160px;
  }
  .lesson-tag span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .slide-dots-ribbon {
    gap: 4px;
  }
  .slide-dot {
    width: 6px;
    height: 6px;
  }
  #sound-btn, .ctrl-btn[onclick*="printMissionBrief"], .ctrl-btn[onclick*="toggleFullscreen"], #spotlight-btn {
    display: none !important;
  }
  main.slide-viewport {
    display: block;
    padding: 10px 14px;
    overflow: visible;
  }
  .slide {
    width: 100%;
    height: auto;
    min-height: calc(100vh - 150px);
    max-height: none;
    overflow-y: visible;
    padding: 18px 20px;
    border-radius: 20px;
  }
  footer.slide-footer {
    margin: 8px 14px 10px 14px;
    padding: 0 16px;
    height: 50px;
  }
  .copilot-workbench-grid {
    grid-template-columns: 1fr !important;
    gap: 14px !important;
  }
  .content-grid {
    grid-template-columns: 1fr !important;
    gap: 12px !important;
  }
}

/* 3. Mobile Phones (< 600px) */
@media (max-width: 600px) {
  body {
    height: auto;
    min-height: 100vh;
    overflow-y: auto;
    padding-bottom: 12px;
  }
  header.slide-header {
    height: 50px;
    min-height: 50px;
    padding: 0 10px;
    gap: 6px;
  }
  .logo-badge {
    gap: 6px;
  }
  .logo-img {
    width: 26px;
    height: 26px;
  }
  .lesson-tag {
    display: none !important;
  }
  .slide-dots-ribbon {
    margin: 0 auto;
    gap: 4px;
  }
  .header-controls {
    gap: 5px;
  }
  .ctrl-btn {
    padding: 5px 7px;
    font-size: 11px;
  }
  .ctrl-btn span {
    display: none !important;
  }
  main.slide-viewport {
    padding: 6px 8px;
    display: block;
  }
  .slide {
    padding: 14px 14px;
    border-radius: 16px;
    height: auto;
    min-height: auto;
    max-height: none;
    overflow-y: visible;
  }
  .slide h1 {
    font-size: 20px !important;
    line-height: 1.25;
  }
  .slide h2 {
    font-size: 17px !important;
    line-height: 1.3;
  }
  .slide p.subtitle {
    font-size: 13px !important;
    margin-bottom: 10px !important;
  }
  .hero-3d-layout {
    flex-direction: column-reverse !important;
    align-items: center !important;
    gap: 10px !important;
  }
  .hero-3d-object {
    width: 75px !important;
    height: 75px !important;
    margin: 0 auto !important;
  }
  .mission-card {
    padding: 12px 14px !important;
  }
  .global-horizon-badge, .global-telemetry-chip {
    font-size: 10px !important;
    padding: 3px 8px !important;
    width: 100% !important;
    justify-content: center !important;
  }
  .global-context-banner {
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 8px !important;
    padding: 10px 12px !important;
  }
  .predict-banner {
    padding: 8px 12px !important;
    gap: 8px !important;
  }
  .predict-banner-icon {
    width: 20px !important;
    height: 20px !important;
  }
  .predict-banner-text {
    font-size: 12px !important;
  }
  .code-header {
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 8px !important;
  }
  .code-header-actions {
    width: 100% !important;
    flex-wrap: wrap !important;
    gap: 6px !important;
  }
  .code-action-btn {
    padding: 4px 8px !important;
    font-size: 11px !important;
  }
  .code-block {
    font-size: 11px !important;
    padding: 10px !important;
  }
  .quiz-btn {
    padding: 10px 12px !important;
    font-size: 13px !important;
  }
  .quest-tier {
    padding: 10px 12px !important;
    flex-wrap: wrap !important;
    gap: 8px !important;
  }
  .quest-info {
    width: 100% !important;
  }
  .next-lesson-row {
    flex-direction: column !important;
    width: 100% !important;
    gap: 8px !important;
  }
  .btn-next-lesson, .next-lesson-row .btn-3d {
    width: 100% !important;
    justify-content: center !important;
    text-align: center !important;
  }
  footer.slide-footer {
    margin: 8px 8px 12px 8px !important;
    padding: 0 12px !important;
    height: 48px !important;
  }
  .slide-counter {
    font-size: 12px !important;
  }
  .nav-buttons .btn-3d {
    padding: 6px 14px !important;
    font-size: 12px !important;
  }
}

/* ==========================================================================
   ZENITH LUXURY MOTION & LINEAR MICRO-BORDERS ENHANCEMENT
   ========================================================================== */
@keyframes zenithSlideEntrance {
  0% {
    opacity: 0;
    transform: translateY(10px) scale(0.995);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.slide.active {
  animation: zenithSlideEntrance 0.32s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.card, .mission-card, .copilot-item, .quiz-option, .slide-dots-ribbon {
  border: 1px solid rgba(226, 232, 240, 0.85) !important;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.95), 0 1px 3px rgba(15, 23, 42, 0.03), 0 8px 24px -6px rgba(15, 23, 42, 0.05) !important;
}

.card:hover, .mission-card:hover {
  box-shadow: inset 0 1.5px 0.5px #FFFFFF, 0 14px 32px -4px rgba(15, 23, 42, 0.08), 0 2px 0 #CBD5E1 !important;
  border-color: #CBD5E1 !important;
}

img[data-has-fallback="true"] {
  filter: drop-shadow(0 2px 8px rgba(244, 96, 12, 0.2));
}