/* ==========================================================================
   YU SLEEP™ - High-Converting Affiliate Single-Page Website
   Domain: theyusleepshop.com
   Theme: Midnight Astral Dark Glassmorphism
   ========================================================================== */

/* 1. Reset & Root Variables */
:root {
  --bg-dark: #030712;
  --bg-surface: #0b132b;
  --bg-card: rgba(15, 23, 42, 0.75);
  --bg-glass: rgba(255, 255, 255, 0.04);
  
  --text-main: #f1f5f9;
  --text-bright: #ffffff;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --accent-cyan: #06b6d4;
  --accent-cyan-glow: rgba(6, 182, 212, 0.35);
  --accent-purple: #a855f7;
  --accent-purple-glow: rgba(168, 85, 247, 0.35);
  --accent-gold: #f59e0b;
  --accent-green: #10b981;
  --accent-red: #f43f5e;
  
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-active: rgba(6, 182, 212, 0.4);
  
  --font-heading: 'Outfit', 'Plus Jakarta Sans', sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  
  --shadow-glow: 0 0 35px rgba(168, 85, 247, 0.25);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--bg-dark);
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(168, 85, 247, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 85% 65%, rgba(6, 182, 212, 0.12) 0%, transparent 40%),
    linear-gradient(180deg, var(--bg-dark) 0%, #02040a 100%);
  background-attachment: fixed;
  color: var(--text-main);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-bright);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

a {
  color: var(--accent-cyan);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--text-bright);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
  background: #1e293b;
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-purple);
}

/* 2. Layout & Container Utilities */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-padding {
  padding: 90px 0;
}

.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 55px auto;
}

.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.3);
  color: var(--accent-cyan);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.badge-pill.purple {
  background: rgba(168, 85, 247, 0.1);
  border-color: rgba(168, 85, 247, 0.3);
  color: var(--accent-purple);
}

.badge-pill.gold {
  background: rgba(245, 158, 11, 0.1);
  border-color: rgba(245, 158, 11, 0.3);
  color: var(--accent-gold);
}

.section-title {
  font-size: clamp(2.1rem, 4vw, 3.2rem);
  margin-bottom: 16px;
}

.gradient-text {
  background: linear-gradient(135deg, #ffffff 0%, var(--accent-cyan) 50%, var(--accent-purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1.1rem;
}

/* Call-to-Action Primary Button */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: linear-gradient(135deg, var(--accent-purple) 0%, #6366f1 50%, var(--accent-cyan) 100%);
  background-size: 200% 200%;
  animation: gradientShift 4s ease infinite;
  color: #ffffff;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.15rem;
  padding: 18px 36px;
  border-radius: var(--radius-full);
  box-shadow: 0 10px 30px rgba(168, 85, 247, 0.4);
  transition: var(--transition);
  border: none;
  cursor: pointer;
  text-align: center;
  width: 100%;
  max-width: 420px;
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 15px 40px rgba(6, 182, 212, 0.6);
  color: #ffffff;
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* Glass Card */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
}

.glass-card:hover {
  border-color: var(--border-active);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}

/* 3. Top Announcement Scarcity Bar */
.announcement-bar {
  background: linear-gradient(90deg, #1e1b4b 0%, #31104b 50%, #1e1b4b 100%);
  border-bottom: 1px solid rgba(168, 85, 247, 0.3);
  padding: 10px 0;
  text-align: center;
  font-size: 0.9rem;
  font-weight: 600;
  position: relative;
  z-index: 1000;
}

.announcement-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.pulse-dot {
  width: 10px;
  height: 10px;
  background-color: var(--accent-red);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-red);
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(244, 63, 94, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 10px rgba(244, 63, 94, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(244, 63, 94, 0); }
}

.timer-box {
  background: rgba(0, 0, 0, 0.4);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--accent-cyan);
  color: var(--accent-cyan);
  font-family: monospace;
  font-weight: 800;
  font-size: 1rem;
}

/* 4. Glassmorphic Sticky Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 999;
  background: rgba(3, 7, 18, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-glass);
  padding: 16px 0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: #ffffff;
}

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

.brand-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: 0 0 15px rgba(6, 182, 212, 0.4);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: 600;
}

.nav-links a:hover {
  color: var(--accent-cyan);
}

.header-cta {
  padding: 10px 24px;
  font-size: 0.95rem;
  width: auto;
}

/* 5. Hero Section Stage */
.hero-section {
  padding: 60px 0 80px 0;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 50px;
  align-items: center;
}

.hero-trust-row {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.rating-stars {
  color: var(--accent-gold);
  font-size: 1.1rem;
  display: flex;
  gap: 4px;
}

.hero-title {
  font-size: clamp(2.4rem, 4.5vw, 3.6rem);
  margin-bottom: 24px;
  line-height: 1.15;
}

.hero-description {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 30px;
}

.hero-benefits-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 36px;
}

.hero-benefits-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text-main);
}

.check-icon {
  width: 22px;
  height: 22px;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid var(--accent-green);
  color: var(--accent-green);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 800;
  flex-shrink: 0;
}

.hero-cta-box {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.price-callout-row {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 4px;
}

.old-price {
  text-decoration: line-through;
  color: var(--text-dim);
  font-size: 1.2rem;
}

.new-price {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--accent-cyan);
  font-family: var(--font-heading);
}

.discount-tag {
  background: rgba(244, 63, 94, 0.15);
  border: 1px solid var(--accent-red);
  color: var(--accent-red);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 700;
}

.hero-guarantee-note {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Product Showcase Box */
.product-stage-box {
  position: relative;
  background: radial-gradient(circle at center, rgba(168, 85, 247, 0.25) 0%, rgba(15, 23, 42, 0.85) 75%);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 40px 30px;
  text-align: center;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

.main-stage-img-wrapper {
  position: relative;
  min-height: 340px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.main-stage-img-wrapper img {
  max-height: 340px;
  object-fit: contain;
  filter: drop-shadow(0 15px 30px rgba(0,0,0,0.6));
  transition: var(--transition);
}

.floating-badge {
  position: absolute;
  background: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(12px);
  border: 1px solid var(--accent-gold);
  color: #ffffff;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 10px 20px rgba(0,0,0,0.4);
  z-index: 2;
}

.badge-top-left {
  top: -10px;
  left: 10px;
}

.badge-bottom-right {
  bottom: 10px;
  right: 10px;
  border-color: var(--accent-cyan);
}

.gallery-thumbs-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.thumb-btn {
  background: var(--bg-card);
  border: 2px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 6px;
  cursor: pointer;
  transition: var(--transition);
  width: 70px;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.thumb-btn img {
  max-height: 100%;
  object-fit: contain;
}

.thumb-btn.active, .thumb-btn:hover {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 15px var(--accent-cyan-glow);
  transform: translateY(-2px);
}

/* 6. Continuous Marquee Ticker */
.marquee-wrapper {
  background: linear-gradient(90deg, rgba(6, 182, 212, 0.1) 0%, rgba(168, 85, 247, 0.1) 100%);
  border-top: 1px solid var(--border-glass);
  border-bottom: 1px solid var(--border-glass);
  padding: 16px 0;
  overflow: hidden;
  white-space: nowrap;
}

.marquee-content {
  display: inline-flex;
  gap: 40px;
  animation: marquee 25s linear infinite;
}

.marquee-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-bright);
}

.marquee-item span {
  color: var(--accent-cyan);
}

@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* 7. Science Breakdown & Mechanism Grid */
.mechanism-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin-bottom: 60px;
}

.mech-card-icon {
  width: 54px;
  height: 54px;
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.2), rgba(6, 182, 212, 0.2));
  border: 1px solid var(--accent-purple);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.mech-card h3 {
  font-size: 1.3rem;
  margin-bottom: 12px;
}

.mech-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.science-diagram-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.science-diagram-card img {
  border-radius: var(--radius-md);
  border: 1px solid var(--border-glass);
  box-shadow: 0 10px 30px rgba(0,0,0,0.4);
}

.science-details h3 {
  font-size: 1.8rem;
  margin-bottom: 16px;
}

.science-details p {
  color: var(--text-muted);
  margin-bottom: 20px;
}

/* 8. Ingredients Grid Section */
.ingredient-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.ingredient-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

.ing-icon {
  width: 44px;
  height: 44px;
  background: rgba(6, 182, 212, 0.12);
  border: 1px solid var(--accent-cyan);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}

.ing-name {
  font-size: 1.15rem;
  color: var(--text-bright);
}

.ing-role {
  font-size: 0.82rem;
  color: var(--accent-cyan);
  font-weight: 700;
  text-transform: uppercase;
}

.ing-desc {
  color: var(--text-muted);
  font-size: 0.92rem;
}

/* 9. Demographic Target Profiles Section */
.demographic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.demo-card h3 {
  font-size: 1.25rem;
  margin-bottom: 12px;
  color: var(--accent-cyan);
}

.demo-card p {
  color: var(--text-muted);
  font-size: 0.93rem;
}

/* 10. Sleep Assessment Widget */
.assessment-card {
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.95), rgba(30, 41, 59, 0.95));
  border: 1px solid var(--accent-purple);
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
  max-width: 840px;
  margin: 0 auto;
  box-shadow: var(--shadow-glow);
}

.assessment-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin: 30px 0;
}

.assess-btn {
  background: var(--bg-dark);
  border: 1px solid var(--border-glass);
  color: var(--text-main);
  padding: 16px;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.assess-btn:hover, .assess-btn.selected {
  border-color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.1);
  color: var(--accent-cyan);
  transform: translateY(-2px);
}

.assessment-result {
  display: none;
  background: rgba(0, 0, 0, 0.4);
  padding: 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--accent-green);
  animation: fadeIn 0.4s ease;
}

.assessment-result.active {
  display: block;
}

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

/* 11. 30-Day Timeline Roadmap */
.timeline-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.timeline-step {
  position: relative;
  padding: 30px;
}

.step-number {
  position: absolute;
  top: -15px;
  left: 30px;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
  color: #ffffff;
  font-family: var(--font-heading);
  font-weight: 800;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  box-shadow: 0 4px 10px rgba(0,0,0,0.3);
}

.timeline-step h3 {
  font-size: 1.25rem;
  margin-top: 10px;
  margin-bottom: 12px;
}

.timeline-step p {
  color: var(--text-muted);
  font-size: 0.93rem;
}

/* 12. Comparison Table Matrix */
.comparison-table-wrapper {
  overflow-x: auto;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-glass);
}

.comparison-table th, .comparison-table td {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-glass);
}

.comparison-table th {
  background: rgba(15, 23, 42, 0.9);
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 800;
}

.comparison-table th.highlight-col, .comparison-table td.highlight-col {
  background: rgba(168, 85, 247, 0.12);
  border-left: 1px solid rgba(168, 85, 247, 0.3);
  border-right: 1px solid rgba(168, 85, 247, 0.3);
}

.check-yes {
  color: var(--accent-green);
  font-weight: 800;
  font-size: 1.2rem;
}

.cross-no {
  color: var(--accent-red);
  font-weight: 800;
  font-size: 1.2rem;
}

/* 13. Discount Pricing Package Section */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  align-items: stretch;
}

.pricing-card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-align: center;
  padding: 36px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}

.pricing-card.popular {
  border: 2px solid var(--accent-purple);
  background: linear-gradient(180deg, rgba(168, 85, 247, 0.15) 0%, rgba(15, 23, 42, 0.9) 100%);
  box-shadow: var(--shadow-glow);
  transform: scale(1.03);
}

.popular-badge {
  position: absolute;
  top: -16px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, var(--accent-purple), var(--accent-cyan));
  color: #ffffff;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 800;
  padding: 4px 20px;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
  box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}

.pricing-header h3 {
  font-size: 1.6rem;
  margin-bottom: 8px;
}

.pricing-subtitle {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 20px;
}

.pricing-img-box {
  min-height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.pricing-img-box img {
  max-height: 170px;
  object-fit: contain;
}

.price-main {
  font-size: 3rem;
  font-weight: 800;
  font-family: var(--font-heading);
  color: #ffffff;
  line-height: 1;
}

.price-unit {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.total-price-tag {
  background: rgba(255, 255, 255, 0.05);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 24px;
}

.pricing-features-list {
  list-style: none;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 30px;
}

.pricing-features-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-main);
}

/* 14. Verified Customer Reviews Grid */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.review-card {
  padding: 28px;
}

.review-user-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.avatar-img {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--accent-cyan);
}

.user-info h4 {
  font-size: 1.05rem;
}

.verified-tag {
  font-size: 0.8rem;
  color: var(--accent-green);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 4px;
}

.review-text {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-style: italic;
}

/* 15. Security Box & Guarantee Seal */
.security-box {
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.95), rgba(6, 182, 212, 0.1));
  border: 1px solid var(--accent-cyan);
  border-radius: var(--radius-lg);
  padding: 40px;
  display: grid;
  grid-template-columns: 1fr 200px;
  gap: 40px;
  align-items: center;
}

.security-content h3 {
  font-size: 1.8rem;
  margin-bottom: 14px;
}

.security-content p {
  color: var(--text-muted);
  margin-bottom: 20px;
}

.badge-wrapper img {
  max-width: 180px;
  filter: drop-shadow(0 0 20px rgba(245, 158, 11, 0.3));
}

/* 16. FAQ Accordions */
.faq-container {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

details.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

details.faq-item[open] {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 25px rgba(6, 182, 212, 0.2);
}

summary.faq-question {
  padding: 22px 28px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text-bright);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

summary.faq-question::-webkit-details-marker {
  display: none;
}

summary.faq-question::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--accent-cyan);
  transition: transform 0.3s ease;
}

details.faq-item[open] summary.faq-question::after {
  content: '−';
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 28px 24px 28px;
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.7;
}

/* 17. Footer */
.references-section {
  background: rgba(0, 0, 0, 0.3);
  border-top: 1px solid var(--border-glass);
  padding: 50px 0;
  font-size: 0.85rem;
}

.references-list {
  padding-left: 20px;
  color: var(--text-dim);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 30px;
}

.main-footer {
  background: var(--bg-dark);
  border-top: 1px solid var(--border-glass);
  padding: 50px 0;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.footer-disclosure {
  max-width: 900px;
  margin: 0 auto 30px auto;
  line-height: 1.6;
}

.footer-links {
  margin-bottom: 20px;
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-copyright {
  color: var(--text-muted);
}

/* 18. Mobile Media Queries & Above-The-Fold SEO Reordering */
@media (max-width: 1024px) {
  .hero-grid {
    display: flex;
    flex-direction: column;
    gap: 20px;
  }

  /* Force Hero Product Stage Image Box to top of Mobile Screen Above The Fold */
  .hero-stage {
    order: -1;
    width: 100%;
    margin-bottom: 10px;
  }

  .product-stage-box {
    padding: 20px 14px;
  }

  .main-stage-img-wrapper {
    min-height: 180px;
    margin-bottom: 12px;
  }

  .main-stage-img-wrapper img {
    max-height: 210px;
  }

  .hero-content {
    display: flex;
    flex-direction: column;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }

  .pricing-card.popular {
    transform: none;
  }

  .security-box {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .badge-wrapper img {
    margin: 0 auto;
  }

  .science-diagram-card {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .hero-title {
    font-size: 1.85rem;
  }

  .hero-benefits-list {
    grid-template-columns: 1fr;
  }

  .references-list {
    grid-template-columns: 1fr;
  }

  .floating-badge {
    padding: 4px 10px;
    font-size: 0.75rem;
  }
}