:root {
  --bg-deep: #050912;
  --bg-primary: #080E1C;
  --bg-card: #0D1629;
  --bg-card-hover: #121E36;
  --bg-elevated: #15233E;
  --bg-glass: rgba(13, 22, 41, 0.82);
  --border-subtle: rgba(148, 163, 184, 0.14);
  --border-accent: rgba(0, 212, 255, 0.38);
  --border-gold: rgba(245, 158, 11, 0.42);
  --text-primary: #F8FAFC;
  --text-secondary: #CBD5E1;
  --text-muted: #94A3B8;
  --cyan: #00D4FF;
  --cyan-dark: #0099CC;
  --cyan-glow: rgba(0, 212, 255, 0.18);
  --ice: #38BDF8;
  --emerald: #10B981;
  --emerald-glow: rgba(16, 185, 129, 0.18);
  --amber: #F59E0B;
  --amber-glow: rgba(245, 158, 11, 0.18);
  --crimson: #EF4444;
  --crimson-glow: rgba(239, 68, 68, 0.2);
  --purple: #8B5CF6;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --shadow-lg: 0 24px 56px -12px rgba(0, 0, 0, 0.65);
  --shadow-cyan: 0 0 35px -5px rgba(0, 212, 255, 0.28);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

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

html {
  scroll-behavior: smooth;
  background-color: var(--bg-deep);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
}

body {
  background:
    radial-gradient(circle at 15% 5%, rgba(0, 212, 255, 0.10), transparent 36%),
    radial-gradient(circle at 85% 12%, rgba(56, 189, 248, 0.08), transparent 38%),
    radial-gradient(circle at 50% 55%, rgba(16, 185, 129, 0.05), transparent 45%),
    var(--bg-deep);
  color: var(--text-primary);
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Top Utility Bar */
.top-bar {
  background: linear-gradient(90deg, #04070F 0%, #0A1428 50%, #04070F 100%);
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.8125rem;
  padding: 8px 0;
  color: var(--text-secondary);
}

.top-bar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.domain-pills {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.domain-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(0, 212, 255, 0.09);
  border: 1px solid rgba(0, 212, 255, 0.25);
  color: var(--cyan);
  padding: 2px 10px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
}

.domain-pill .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--emerald);
  box-shadow: 0 0 8px var(--emerald);
}

.top-bar-right {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.top-bar-link {
  color: var(--text-secondary);
  transition: color 0.2s;
  font-weight: 500;
}

.top-bar-link:hover {
  color: var(--cyan);
}

.currency-toggle {
  display: inline-flex;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  padding: 2px;
}

.currency-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.2s;
}

.currency-btn.active {
  background: var(--cyan);
  color: #030712;
}

/* Main Navigation */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(5, 9, 18, 0.86);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 14px 0;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

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

.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 11px;
  background: linear-gradient(135deg, #00D4FF 0%, #0284C7 60%, #0F172A 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.22);
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.08rem;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  line-height: 1.15;
}

.brand-title span {
  color: var(--cyan);
}

.brand-subtitle {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  font-weight: 600;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
}

.nav-link {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: color 0.2s;
  position: relative;
}

.nav-link:hover {
  color: var(--cyan);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
  font-size: 0.92rem;
  padding: 11px 20px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.22s ease;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #00D4FF 0%, #0099CC 100%);
  color: #040914;
  box-shadow: 0 8px 25px -4px rgba(0, 212, 255, 0.45);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px -4px rgba(0, 212, 255, 0.65);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border-color: var(--border-subtle);
}

.btn-secondary:hover {
  background: rgba(0, 212, 255, 0.1);
  border-color: var(--border-accent);
  color: var(--cyan);
}

.btn-amber {
  background: linear-gradient(135deg, #F59E0B 0%, #D97706 100%);
  color: #050912;
  box-shadow: 0 8px 25px -4px rgba(245, 158, 11, 0.4);
}

.btn-amber:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px -4px rgba(245, 158, 11, 0.6);
}

.btn-sm {
  padding: 8px 14px;
  font-size: 0.82rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 14px 26px;
  font-size: 1rem;
}

/* Hero Section */
.hero {
  padding: 64px 0 56px;
  position: relative;
  border-bottom: 1px solid var(--border-subtle);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: 44px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.3);
  color: var(--cyan);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 20px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.35rem, 4.1vw, 3.65rem);
  font-weight: 800;
  line-height: 1.09;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.hero h1 .gradient-text {
  background: linear-gradient(90deg, #00D4FF 0%, #7DD3FC 50%, #F59E0B 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-lead {
  font-size: 1.12rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
  max-width: 640px;
}

.hero-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 32px;
}

.hero-trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
}

.trust-stat {
  background: rgba(13, 22, 41, 0.65);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px 14px;
}

.trust-stat-val {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--cyan);
  line-height: 1.15;
}

.trust-stat-lbl {
  font-size: 0.76rem;
  color: var(--text-muted);
  margin-top: 3px;
}

/* Hero Interactive Showcase Card */
.hero-showcase {
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-xl);
  padding: 18px;
  box-shadow: var(--shadow-lg), var(--shadow-cyan);
  position: relative;
}

.showcase-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-subtle);
}

.window-dots {
  display: flex;
  gap: 6px;
}

.window-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.window-dots span:nth-child(1) { background: #EF4444; }
.window-dots span:nth-child(2) { background: #F59E0B; }
.window-dots span:nth-child(3) { background: #10B981; }

.showcase-tabs {
  display: flex;
  gap: 6px;
  background: var(--bg-deep);
  padding: 4px;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
}

.showcase-tab {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 0.76rem;
  font-weight: 700;
  padding: 5px 12px;
  border-radius: 999px;
  cursor: pointer;
}

.showcase-tab.active {
  background: var(--cyan);
  color: #040914;
}

.video-stage {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #000;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--border-subtle);
}

.video-stage video,
.video-stage img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.showcase-footer {
  margin-top: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: var(--bg-elevated);
  padding: 12px 14px;
  border-radius: var(--radius-md);
}

.badge-live {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--emerald);
  background: var(--emerald-glow);
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid rgba(16, 185, 129, 0.35);
}

/* Logo / Ecosystem Strip */
.authority-strip {
  background: rgba(8, 14, 28, 0.9);
  border-bottom: 1px solid var(--border-subtle);
  padding: 20px 0;
}

.authority-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 18px;
}

.authority-label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  font-weight: 700;
}

.authority-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.auth-tag {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
}

/* Section Headers */
.section {
  padding: 80px 0;
  border-bottom: 1px solid var(--border-subtle);
}

.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 48px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 3vw, 2.65rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.15;
  margin-bottom: 14px;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

/* Interactive Telemetry Simulator */
.simulator-shell {
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-xl);
  padding: 28px;
  box-shadow: var(--shadow-lg);
}

.sim-top-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 22px;
}

.scenario-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.scenario-btn {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 9px 15px;
  border-radius: var(--radius-sm);
  font-size: 0.83rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
}

.scenario-btn:hover {
  border-color: var(--cyan);
  color: var(--text-primary);
}

.scenario-btn.active {
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.22), rgba(0, 153, 204, 0.32));
  border-color: var(--cyan);
  color: var(--cyan);
  box-shadow: 0 0 18px rgba(0, 212, 255, 0.25);
}

.sim-grid {
  display: grid;
  grid-template-columns: 1.55fr 0.85fr;
  gap: 18px;
}

.chart-panel {
  background: #040811;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 18px;
  position: relative;
}

.telemetry-readout-bar {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 8px;
  margin-bottom: 14px;
  background: rgba(13, 22, 41, 0.9);
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

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

.readout-label {
  font-size: 0.68rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.readout-val {
  font-weight: 700;
  font-size: 0.92rem;
}

.chart-svg-wrap {
  width: 100%;
  height: 320px;
  position: relative;
  cursor: crosshair;
}

.chart-svg-wrap svg {
  width: 100%;
  height: 100%;
  display: block;
}

.chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.legend-swatch {
  width: 14px;
  height: 3px;
  border-radius: 2px;
}

.diagnostic-panel {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.diag-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.diag-title {
  font-family: var(--font-display);
  font-size: 1.22rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.diag-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 14px;
}

.diag-signature-list {
  list-style: none;
  margin-bottom: 16px;
}

.diag-signature-list li {
  font-size: 0.82rem;
  color: var(--text-secondary);
  padding: 6px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.diag-signature-list li strong {
  color: var(--cyan);
}

.diag-challenge-box {
  background: rgba(5, 9, 18, 0.7);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-md);
  padding: 14px;
}

.diag-challenge-title {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 8px;
}

.diag-choice-btn {
  width: 100%;
  text-align: left;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 0.79rem;
  margin-bottom: 6px;
  cursor: pointer;
  transition: all 0.18s;
}

.diag-choice-btn:hover {
  border-color: var(--cyan);
  color: var(--text-primary);
}

.diag-choice-btn.correct {
  background: rgba(16, 185, 129, 0.2);
  border-color: var(--emerald);
  color: #A7F3D0;
}

.diag-choice-btn.wrong {
  background: rgba(239, 68, 68, 0.2);
  border-color: var(--crimson);
  color: #FECACA;
}

.diag-feedback {
  font-size: 0.8rem;
  margin-top: 8px;
  padding: 8px 10px;
  border-radius: 6px;
  display: none;
}

/* Real Telemetry Graph Gallery Strip */
.graph-gallery-strip {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
}

.graph-thumb-card {
  background: #040811;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  transition: all 0.2s;
}

.graph-thumb-card:hover {
  border-color: var(--cyan);
  transform: translateY(-3px);
}

.graph-thumb-card img {
  width: 100%;
  height: 110px;
  object-fit: cover;
  display: block;
}

.graph-thumb-caption {
  padding: 8px 10px;
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--text-secondary);
}

/* Course Catalogue Cards */
.course-filter-bar {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.filter-pill {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 9px 18px;
  border-radius: 999px;
  font-size: 0.86rem;
  font-weight: 700;
  cursor: pointer;
}

.filter-pill.active {
  background: var(--cyan);
  color: #040914;
  border-color: var(--cyan);
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  align-items: stretch;
}

.course-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all 0.25s ease;
  position: relative;
}

.course-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-lg), var(--shadow-cyan);
}

.course-card.featured {
  border: 2px solid var(--cyan);
  box-shadow: var(--shadow-lg), var(--shadow-cyan);
}

.course-ribbon {
  position: absolute;
  top: 14px;
  right: 14px;
  background: linear-gradient(135deg, #F59E0B, #D97706);
  color: #040914;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 4px 11px;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  z-index: 2;
}

.course-media {
  position: relative;
  height: 205px;
  background: #040811;
  border-bottom: 1px solid var(--border-subtle);
  overflow: hidden;
}

.course-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.course-level-badge {
  position: absolute;
  bottom: 12px;
  left: 12px;
  background: rgba(5, 9, 18, 0.88);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-accent);
  color: var(--cyan);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.74rem;
  font-weight: 700;
}

.course-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.course-title {
  font-family: var(--font-display);
  font-size: 1.32rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 10px;
}

.course-desc {
  font-size: 0.84rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.course-meta-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin-bottom: 18px;
  padding: 12px;
  background: rgba(5, 9, 18, 0.55);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  font-size: 0.8rem;
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
}

.syllabus-accordion {
  margin-bottom: 20px;
  border-top: 1px solid var(--border-subtle);
  padding-top: 12px;
}

.syllabus-toggle {
  width: 100%;
  background: transparent;
  border: none;
  color: var(--cyan);
  font-size: 0.84rem;
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  padding: 6px 0;
}

.syllabus-list {
  list-style: none;
  margin-top: 10px;
  display: none;
}

.syllabus-list.open {
  display: block;
}

.syllabus-list li {
  font-size: 0.8rem;
  color: var(--text-secondary);
  padding: 6px 0;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  gap: 8px;
}

.course-footer {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.course-price-wrap {
  display: flex;
  flex-direction: column;
}

.course-price {
  font-family: var(--font-display);
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.1;
}

.course-price-note {
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* Interactive Classroom & Quiz Sandbox */
.classroom-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 28px;
}

.classroom-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 24px;
}

.lesson-switcher {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.lesson-btn {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
}

.lesson-btn.active {
  background: var(--cyan);
  color: #040914;
  border-color: var(--cyan);
}

.quiz-analytics-banner {
  background: rgba(0, 212, 255, 0.07);
  border: 1px solid rgba(0, 212, 255, 0.25);
  border-radius: var(--radius-md);
  padding: 12px;
  margin-bottom: 16px;
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.learner-mini-form {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin-bottom: 16px;
}

.learner-mini-form input,
.learner-mini-form select {
  background: var(--bg-deep);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 0.8rem;
}

.quiz-question-box {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 18px;
}

.quiz-progress {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--cyan);
  font-weight: 700;
  margin-bottom: 8px;
}

.quiz-q-text {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 14px;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.quiz-opt-btn {
  text-align: left;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 0.86rem;
  cursor: pointer;
  transition: all 0.18s;
}

.quiz-opt-btn:hover {
  border-color: var(--cyan);
  color: var(--text-primary);
}

.quiz-opt-btn.selected-correct {
  background: rgba(16, 185, 129, 0.2);
  border-color: var(--emerald);
  color: #A7F3D0;
}

.quiz-opt-btn.selected-wrong {
  background: rgba(239, 68, 68, 0.2);
  border-color: var(--crimson);
  color: #FECACA;
}

/* B2B ROI Calculator */
.roi-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-xl);
  padding: 32px;
  box-shadow: var(--shadow-lg);
}

.slider-group {
  margin-bottom: 22px;
}

.slider-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  font-size: 0.84rem;
  font-weight: 600;
}

.slider-val-badge {
  background: rgba(0, 212, 255, 0.14);
  border: 1px solid rgba(0, 212, 255, 0.35);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 6px;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--cyan);
  height: 6px;
  background: var(--bg-elevated);
  border-radius: 999px;
  cursor: pointer;
}

.roi-results-card {
  background: linear-gradient(160deg, #0E1B33 0%, #070D19 100%);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  padding: 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.roi-big-saving {
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 3.4vw, 3rem);
  font-weight: 800;
  color: var(--emerald);
  line-height: 1.1;
  margin: 6px 0 16px;
}

.roi-kpi-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

.roi-kpi {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  padding: 12px;
  border-radius: var(--radius-md);
}

.roi-kpi-val {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-primary);
}

.roi-kpi-lbl {
  font-size: 0.76rem;
  color: var(--text-muted);
}

/* Certificate Verification Section */
.cert-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 32px;
  align-items: center;
}

.cert-preview-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.cert-frame {
  background: var(--bg-card);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-md);
  padding: 10px;
  box-shadow: var(--shadow-lg);
}

.cert-frame img {
  width: 100%;
  border-radius: 6px;
  display: block;
}

.cert-frame-caption {
  font-size: 0.76rem;
  color: var(--text-secondary);
  text-align: center;
  margin-top: 8px;
  font-weight: 600;
}

.cert-verifier-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 28px;
}

.verify-input-row {
  display: flex;
  gap: 10px;
  margin: 14px 0;
}

.verify-input-row input {
  flex: 1;
  background: var(--bg-deep);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  text-transform: uppercase;
}

.demo-chip-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.demo-chip {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: 999px;
  cursor: pointer;
}

.verify-result-box {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.4);
  border-radius: var(--radius-md);
  padding: 16px;
  font-size: 0.85rem;
}

/* Pricing Grid */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.price-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 26px 22px;
  display: flex;
  flex-direction: column;
  position: relative;
}

.price-card.popular {
  border: 2px solid var(--cyan);
  box-shadow: var(--shadow-cyan);
}

.price-tier-name {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--cyan);
  font-weight: 800;
  margin-bottom: 6px;
}

.price-amount {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 4px;
}

.price-sub {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 18px;
}

.price-features {
  list-style: none;
  margin-bottom: 24px;
  flex: 1;
}

.price-features li {
  font-size: 0.84rem;
  color: var(--text-secondary);
  padding: 7px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.price-features li::before {
  content: "✓";
  color: var(--emerald);
  font-weight: 800;
}

/* Instructor & Authority Section */
.instructor-card {
  background: linear-gradient(135deg, #0D1629 0%, #091224 100%);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 36px;
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 36px;
  align-items: center;
}

/* FAQ Accordion */
.faq-grid {
  max-width: 880px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 18px 22px;
}

.faq-q {
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-a {
  font-size: 0.84rem;
  color: var(--text-secondary);
  margin-top: 10px;
}

/* Footer */
.footer {
  background: #03060D;
  padding: 64px 0 40px;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.88rem;
  color: var(--text-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 32px;
  margin-bottom: 40px;
}

.footer-col h4 {
  color: var(--text-primary);
  font-size: 0.92rem;
  margin-bottom: 14px;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 8px;
}

.footer-col ul li a:hover {
  color: var(--cyan);
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
}

/* Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(3, 6, 13, 0.82);
  backdrop-filter: blur(8px);
  z-index: 999;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-backdrop.open {
  display: flex;
}

.modal-card {
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-xl);
  max-width: 600px;
  width: 100%;
  padding: 28px;
  box-shadow: var(--shadow-lg), var(--shadow-cyan);
  position: relative;
}

.modal-close {
  position: absolute;
  top: 18px;
  right: 18px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  cursor: pointer;
  font-weight: 800;
}

.form-grid {
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.form-grid input,
.form-grid select,
.form-grid textarea {
  width: 100%;
  background: var(--bg-deep);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 11px 14px;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.84rem;
}

@media (max-width: 1024px) {
  .hero-grid,
  .sim-grid,
  .courses-grid,
  .classroom-grid,
  .roi-grid,
  .cert-grid,
  .pricing-grid,
  .instructor-card,
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .graph-gallery-strip {
    grid-template-columns: repeat(2, 1fr);
  }
  .telemetry-readout-bar {
    grid-template-columns: repeat(3, 1fr);
  }
}