/* ==========================================================================
   CSS Stylesheet - Gemini AI Pro Premium Landing Page
   Design System: noti-vn (Liquid-Glass AI-tech Theme)
   Colors: Blue Gradient #0061ff -> #00c2ff
   ========================================================================== */

/* === 1. Design Tokens (CSS Variables) === */
:root {
  --primary: #0061ff;
  --secondary: #00c2ff;
  --gradient: linear-gradient(135deg, #0061ff 0%, #00c2ff 100%);
  --gradient-soft: linear-gradient(135deg, rgba(0, 97, 255, 0.08) 0%, rgba(0, 194, 255, 0.08) 100%);
  --gradient-medium: linear-gradient(135deg, rgba(0, 97, 255, 0.15) 0%, rgba(0, 194, 255, 0.15) 100%);
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-shadow: 0 8px 32px rgba(0, 97, 255, 0.08);
  --glass-inset: inset 0 1px 0 rgba(255, 255, 255, 0.6);
  --blob-opacity: 0.35;
  --shadow-sm: 0 2px 8px rgba(0, 97, 255, 0.06);
  --shadow-md: 0 8px 24px rgba(0, 97, 255, 0.1);
  --shadow-lg: 0 20px 60px rgba(0, 97, 255, 0.12);
  --shadow-xl: 0 30px 80px rgba(0, 97, 255, 0.15);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-2xl: 24px;
  --radius-pill: 50px;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg-primary: #0a0f1c;
  --bg-secondary: #111827;
  --bg-tertiary: #1e293b;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --glass-bg: rgba(15, 23, 42, 0.6);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  --glass-inset: inset 0 1px 0 rgba(255, 255, 255, 0.05);
  --blob-opacity: 0.2;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 30px 80px rgba(0, 0, 0, 0.5);
}

/* === 2. Base Reset & Typography === */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  overflow-x: hidden;
  line-height: 1.6;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}
::-webkit-scrollbar-thumb {
  background: var(--gradient);
  border-radius: 5px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

@media (max-width: 768px) {
  .container {
    padding: 0 1.25rem;
  }
}

/* === 3. Background Decoration Blobs === */
.bg-decoration {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
}

.bg-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: var(--blob-opacity);
  animation: blobFloat 20s ease-in-out infinite;
  transition: opacity var(--transition-normal);
}

.bg-blob-1 {
  width: 600px;
  height: 600px;
  background: var(--primary);
  top: -200px;
  right: -200px;
}

.bg-blob-2 {
  width: 500px;
  height: 500px;
  background: var(--secondary);
  bottom: -150px;
  left: -150px;
  animation-delay: -7s;
}

.bg-blob-3 {
  width: 400px;
  height: 400px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation-delay: -14s;
}

@keyframes blobFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(30px, -30px) scale(1.05); }
  50% { transform: translate(-20px, 20px) scale(0.95); }
  75% { transform: translate(-30px, -20px) scale(1.02); }
}

@media (max-width: 768px) {
  .bg-blob-1 { width: 300px; height: 300px; top: -100px; right: -100px; }
  .bg-blob-2 { width: 250px; height: 250px; bottom: -80px; left: -80px; }
  .bg-blob-3 { width: 200px; height: 200px; }
}

/* === 4. Utility Classes === */
.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-tag {
  display: inline-block;
  background: var(--gradient-soft);
  color: var(--primary);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 1rem;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 4rem;
}

.section-header h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  line-height: 1.7;
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all var(--transition-slow);
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(1.8);
  -webkit-backdrop-filter: blur(20px) saturate(1.8);
  border: none;
  border-radius: var(--radius-2xl);
  box-shadow: var(--glass-shadow), var(--glass-inset);
  transition: background var(--transition-normal), box-shadow var(--transition-normal);
}

/* === 5. Header & Navigation (Standard 11) === */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 0.75rem 0;
  transition: all var(--transition-smooth);
}

header.scrolled {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(1.8);
  -webkit-backdrop-filter: blur(20px) saturate(1.8);
  box-shadow: 0 4px 30px rgba(0, 97, 255, 0.1);
}

[data-theme="dark"] header.scrolled {
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
}

.logo svg {
  color: var(--primary);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin-right: 0.5rem;
}

.nav-link {
  padding: 0.55rem 0.9rem;
  border-radius: var(--radius-pill);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  transition: all 0.25s;
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--primary);
  background: var(--gradient-soft);
}

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

.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
}

.theme-toggle:hover {
  color: var(--primary);
}

.sun-icon {
  display: none;
}

[data-theme="dark"] .sun-icon {
  display: block;
}

[data-theme="dark"] .moon-icon {
  display: none;
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
}

.menu-toggle:hover {
  color: var(--primary);
}

/* Mobile drawer navigation */
.mobile-nav {
  position: fixed;
  top: 0;
  right: 0;
  width: 280px;
  max-width: 85vw;
  height: 100vh;
  background: var(--bg-primary);
  box-shadow: -10px 0 40px rgba(0, 0, 0, 0.15);
  z-index: 1100;
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  padding: 5rem 1.5rem 2rem;
}

.mobile-nav.open {
  transform: translateX(0);
}

.mobile-nav .nav-link {
  padding: 1rem;
  border-radius: var(--radius-md);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
}

.mobile-nav .btn-primary {
  margin-top: 1.5rem;
  justify-content: center;
}

.mobile-nav-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mobile-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(4px);
  z-index: 1050;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.mobile-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

@media (max-width: 1024px) {
  .nav-menu { display: none; }
  .menu-toggle { display: flex; }
  .header-actions .btn-header-cta { display: none; }
}

/* === 6. Button Presets === */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--gradient);
  color: #fff;
  padding: 0.9rem 1.75rem;
  border-radius: var(--radius-pill);
  text-decoration: none;
  font-weight: 700;
  font-size: 1rem;
  box-shadow: 0 4px 16px rgba(0, 97, 255, 0.3);
  transition: all var(--transition-normal);
  border: none;
  cursor: pointer;
  font-family: 'Inter', sans-serif;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0, 97, 255, 0.4);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--glass-bg);
  color: var(--text-primary);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 0.9rem 1.75rem;
  border-radius: var(--radius-pill);
  text-decoration: none;
  font-weight: 600;
  box-shadow: var(--glass-shadow);
  transition: all var(--transition-normal);
  border: none;
  cursor: pointer;
}

.btn-secondary:hover {
  color: var(--primary);
  transform: translateY(-2px);
}

.btn-white {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: #ffffff;
  color: var(--primary);
  padding: 0.85rem 2rem;
  border-radius: var(--radius-pill);
  text-decoration: none;
  font-weight: 700;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
  border: none;
  cursor: pointer;
}

.btn-white:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.15);
}

/* === 7. Hero Section (AI-tech Layout) === */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 7rem 2rem 4rem;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 97, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 97, 255, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  pointer-events: none;
  animation: gridPulse 8s ease-in-out infinite;
}

[data-theme="dark"] .hero-grid {
  background-image:
    linear-gradient(rgba(0, 97, 255, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 97, 255, 0.07) 1px, transparent 1px);
}

.hero-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.particle {
  position: absolute;
  border-radius: 50%;
  opacity: 0;
  animation: particleFloat linear infinite;
}

.particle:nth-child(1) { width: 8px; height: 8px; background: var(--primary); left: 10%; animation-duration: 12s; animation-delay: 1s; }
.particle:nth-child(2) { width: 14px; height: 14px; background: var(--secondary); left: 25%; animation-duration: 18s; animation-delay: 3s; }
.particle:nth-child(3) { width: 6px; height: 6px; background: var(--primary); left: 45%; animation-duration: 10s; animation-delay: 0s; }
.particle:nth-child(4) { width: 12px; height: 12px; background: var(--secondary); left: 60%; animation-duration: 15s; animation-delay: 4s; }
.particle:nth-child(5) { width: 8px; height: 8px; background: var(--primary); left: 75%; animation-duration: 14s; animation-delay: 2s; }
.particle:nth-child(6) { width: 16px; height: 16px; background: var(--secondary); left: 88%; animation-duration: 20s; animation-delay: 5s; }
.particle:nth-child(7) { width: 10px; height: 10px; background: var(--primary); left: 35%; animation-duration: 16s; animation-delay: 1s; }
.particle:nth-child(8) { width: 7px; height: 7px; background: var(--secondary); left: 70%; animation-duration: 13s; animation-delay: 0s; }

@keyframes particleFloat {
  0% { transform: translateY(100vh) rotate(0deg); opacity: 0; }
  5% { opacity: 0.5; }
  90% { opacity: 0.5; }
  100% { transform: translateY(-120px) rotate(720deg); opacity: 0; }
}

.hero-neural {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.neural-line {
  position: absolute;
  background: linear-gradient(90deg, transparent, rgba(0, 97, 255, 0.15), transparent);
  height: 1px;
  width: 200px;
  animation: neuralFlow 6s linear infinite;
}

.neural-line:nth-child(1) { top: 15%; animation-duration: 8s; animation-delay: 0s; }
.neural-line:nth-child(2) { top: 35%; animation-duration: 12s; animation-delay: 2s; }
.neural-line:nth-child(3) { top: 55%; animation-duration: 7s; animation-delay: 1s; }
.neural-line:nth-child(4) { top: 75%; animation-duration: 10s; animation-delay: 3s; }
.neural-line:nth-child(5) { top: 90%; animation-duration: 9s; animation-delay: 0s; }

@keyframes neuralFlow {
  0% { transform: translateX(-100%); opacity: 0; }
  20% { opacity: 1; }
  80% { opacity: 1; }
  100% { transform: translateX(calc(100vw + 100%)); opacity: 0; }
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-split {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  align-items: center;
  text-align: left;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 1.5rem;
  text-align: left;
}

.hero-desc {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 800px;
  margin: 0 0 2.5rem;
  text-align: left;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: flex-start;
  flex-wrap: wrap;
  margin-bottom: 0;
}

.hero-visual {
  max-width: 100%;
  padding: 1rem;
  border-radius: var(--radius-2xl);
  overflow: hidden;
}

.hero-visual img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-xl);
  display: block;
}

@media (max-width: 1024px) {
  .hero-split {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2.5rem;
  }
  .hero h1 {
    text-align: center;
  }
  .hero-desc {
    text-align: center;
    margin: 0 auto 2.5rem;
  }
  .hero-cta {
    justify-content: center;
  }
  .hero-visual {
    max-width: 500px;
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  .hero { padding: 6rem 1rem 3rem; min-height: auto; }
  .hero-cta { flex-direction: column; align-items: stretch; padding: 0 1rem; }
  .hero-cta .btn-primary, .hero-cta .btn-secondary { justify-content: center; width: 100%; }
}

/* === 8. Section Design === */
section {
  padding: 6rem 0;
  position: relative;
}

@media (max-width: 768px) {
  section {
    padding: 4rem 0;
  }
}

/* === 9. Card Badges (Numbered badges - Rule 13) === */
.pain-card, .feature-card, .pillar-card, .formula-card {
  position: relative;
  padding: 2.5rem 2rem;
  transition: transform var(--transition-normal);
  height: 100%;
}

.pain-card:hover, .feature-card:hover, .pillar-card:hover, .formula-card:hover {
  transform: translateY(-5px);
}

/* Badge Style 6a: Round badge top right */
.card-number {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1rem;
  box-shadow: 0 6px 16px rgba(0, 97, 255, 0.3);
  letter-spacing: 0.5px;
}

/* Adjust h3 if card has top right badge to prevent overlap */
.pain-card h3, .feature-card h3 {
  padding-right: 3rem;
  margin-bottom: 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
}

.pain-card p, .feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

@media (max-width: 768px) {
  .card-number {
    width: 38px;
    height: 38px;
    font-size: 0.9rem;
  }
}

/* === 10. Features & Pain Grids === */
.features-grid, .pain-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

@media (max-width: 480px) {
  .features-grid, .pain-grid {
    grid-template-columns: 1fr;
  }
}

.feature-icon-wrap {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--gradient-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  transition: transform var(--transition-normal);
}

.feature-card:hover .feature-icon-wrap {
  transform: scale(1.1);
  background: var(--gradient);
  color: #fff;
}

.feature-icon-wrap svg {
  width: 28px;
  height: 28px;
}

/* === 11. Before / After Section (No inset border line) === */
.ba-wrapper {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.ba-col {
  padding: 2.5rem 2rem;
  border-radius: var(--radius-2xl);
  height: 100%;
}

.ba-col.before {
  background: rgba(239, 68, 68, 0.05); /* Red soft background */
}

.ba-col.after {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(1.8);
  box-shadow: var(--glass-shadow), var(--glass-inset);
}

.ba-col h3 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.ba-col.before h3 {
  color: #ef4444;
}

.ba-col.after h3 {
  color: #10b981;
}

.ba-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.ba-item {
  display: flex;
  gap: 0.75rem;
  font-size: 0.95rem;
  line-height: 1.6;
}

.ba-item-icon {
  flex-shrink: 0;
  margin-top: 0.15rem;
}

.ba-col.before .ba-item-icon {
  color: #ef4444;
}

.ba-col.after .ba-item-icon {
  color: #10b981;
}

@media (max-width: 768px) {
  .ba-wrapper {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

/* === 12. Pricing Section (No top border line - Advanced 4) === */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  max-width: 900px;
  margin: 0 auto;
}

@media (max-width: 768px) {
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 450px;
  }
}

.pricing-card {
  padding: 3rem 2rem;
  border-radius: var(--radius-2xl);
  text-align: center;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
}

.pricing-card.popular {
  background: var(--glass-bg);
  box-shadow: 0 20px 40px rgba(0, 97, 255, 0.12), var(--glass-inset);
  transform: scale(1.03);
  z-index: 2;
}

@media (max-width: 768px) {
  .pricing-card.popular {
    transform: none;
  }
}

.pricing-badge {
  display: inline-block;
  background: var(--gradient);
  color: #ffffff;
  padding: 0.4rem 1rem;
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin: 0 auto 1.5rem;
  width: fit-content;
}

.pricing-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.pricing-card .pricing-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.pricing-old {
  color: var(--text-muted);
  text-decoration: line-through;
  font-size: 1.15rem;
  margin-bottom: 0.25rem;
}

.pricing-new {
  font-size: 2.75rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 0.5rem;
}

.pricing-note {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.pricing-includes {
  text-align: left;
  list-style: none;
  margin-bottom: 2rem;
  flex-grow: 1;
}

.pricing-includes li {
  padding: 0.5rem 0;
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.pricing-includes svg {
  flex-shrink: 0;
  color: #10b981;
  margin-top: 0.2rem;
}

.pricing-card .btn-primary, .pricing-card .btn-secondary {
  width: 100%;
  justify-content: center;
}

/* === 13. FAQ Section === */
.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(1.8);
  -webkit-backdrop-filter: blur(20px) saturate(1.8);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow), var(--glass-inset);
  margin-bottom: 1rem;
  overflow: hidden;
  transition: background var(--transition-normal);
}

.faq-question {
  width: 100%;
  padding: 1.25rem 1.5rem;
  background: none;
  border: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-family: inherit;
  font-weight: 600;
  color: var(--text-primary);
  font-size: 1.05rem;
  text-align: left;
}

.faq-question svg {
  transition: transform var(--transition-normal);
  color: var(--text-muted);
  flex-shrink: 0;
}

.faq-item.open .faq-question svg {
  transform: rotate(180deg);
  color: var(--primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-smooth);
  padding: 0 1.5rem;
}

.faq-item.open .faq-answer {
  max-height: 400px;
  padding: 0 1.5rem 1.25rem;
}

.faq-answer p {
  color: var(--text-secondary);
  line-height: 1.7;
  font-size: 0.95rem;
}

/* === 14. Checkout Grid & Form (Standard 14) === */
.checkout-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2.5rem;
  align-items: start;
}

@media (max-width: 900px) {
  .checkout-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

.form-container, .payment-container {
  padding: 2.5rem;
  border-radius: var(--radius-2xl);
}

@media (max-width: 480px) {
  .form-container, .payment-container {
    padding: 1.5rem;
  }
}

.form-title {
  text-align: center;
  font-size: 1.65rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.form-subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  font-size: 0.95rem;
}

.form-group {
  margin-bottom: 1.25rem;
  text-align: left;
}

.form-label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.form-input {
  width: 100%;
  padding: 0.85rem 1rem;
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 1.5px solid var(--bg-tertiary);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 16px; /* 16px to prevent iOS auto-zoom */
  transition: all var(--transition-normal);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 97, 255, 0.1);
}

.form-input.error {
  border-color: #ef4444;
}

.form-error {
  display: none;
  color: #ef4444;
  font-size: 0.82rem;
  margin-top: 0.35rem;
}

.form-group.has-error .form-error {
  display: block;
}

/* Honeypot field (hidden from users) */
.hp-field {
  position: absolute;
  left: -9999px;
  opacity: 0;
  pointer-events: none;
}

/* Package selector design */
.package-selector {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.package-option {
  cursor: pointer;
  display: block;
}

.package-option input[type="radio"] {
  display: none;
}

.package-option-ui {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-lg);
  border: 1.5px solid var(--bg-tertiary);
  background: var(--bg-primary);
  transition: all var(--transition-normal);
}

.package-option input[type="radio"]:checked + .package-option-ui {
  border-color: var(--primary);
  background: var(--gradient-soft);
}

.opt-details {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  text-align: left;
}

.opt-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.opt-badge {
  background: var(--gradient);
  color: #fff;
  font-size: 0.7rem;
  padding: 0.15rem 0.4rem;
  border-radius: var(--radius-pill);
  font-weight: 800;
  letter-spacing: 0.5px;
}

.opt-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.opt-price {
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--primary);
}

/* Submit state and spinner */
.form-submit {
  width: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: var(--gradient);
  color: #fff;
  border: none;
  padding: 1rem 1.5rem;
  border-radius: var(--radius-pill);
  font-family: inherit;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition-normal);
  box-shadow: 0 4px 16px rgba(0, 97, 255, 0.3);
}

.form-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0, 97, 255, 0.4);
}

.form-submit:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

.form-submit .spinner {
  display: none;
}

.form-submit.loading .btn-text, .form-submit.loading .btn-icon {
  display: none;
}

.form-submit.loading .spinner {
  display: block;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.hidden {
  display: none !important;
}

/* Success and dynamic QR layouts */
.success-screen {
  text-align: center;
  animation: fadeInUp 0.5s ease;
}

.success-screen.hidden {
  display: none;
}

.success-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 1.5rem;
  border-radius: 50%;
  background: var(--gradient);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
}

.success-icon svg {
  width: 38px;
  height: 38px;
}

.success-message {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
}

.success-details {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 2rem;
  line-height: 1.6;
}

.qr-box {
  position: relative;
  background: #ffffff;
  padding: 1.25rem;
  border-radius: var(--radius-lg);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 240px;
}

.qr-image {
  max-width: 240px;
  width: 100%;
  height: auto;
  display: block;
  z-index: 1;
}

.qr-loading {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--text-muted);
  font-size: 0.9rem;
}

.bank-info-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
}

.bank-info-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 0;
  font-size: 0.95rem;
}

.bank-info-row:not(:last-child) {
  border-bottom: 1px solid var(--bg-tertiary);
}

.bank-info-label {
  color: var(--text-muted);
  font-weight: 500;
}

.bank-info-value {
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-copy {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: none;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-copy:hover {
  background: var(--primary);
  color: #fff;
}

.payment-note {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-top: 1rem;
}

/* === 15. Reviews / Testimonials Section === */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

@media (max-width: 480px) {
  .reviews-grid {
    grid-template-columns: 1fr;
  }
}

.review-card {
  padding: 2rem;
  border-radius: var(--radius-xl);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
}

.review-stars {
  color: #f59e0b; /* Yellow rating stars */
  font-size: 1.1rem;
  margin-bottom: 1rem;
  display: flex;
  gap: 0.2rem;
}

.review-content {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
  font-style: italic;
  position: relative;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.95rem;
}

.author-info {
  text-align: left;
}

.author-info h5 {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.author-info p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* === 16. Final CTA Section === */
.final-cta {
  padding: 5rem 2rem;
}

.final-cta-container {
  max-width: 900px;
  margin: 0 auto;
  background: var(--gradient);
  color: #fff;
  padding: 4rem 2rem;
  border-radius: var(--radius-2xl);
  text-align: center;
  box-shadow: 0 10px 40px rgba(0, 97, 255, 0.2);
}

.final-cta-container h2 {
  font-size: clamp(1.8rem, 4vw, 2.75rem);
  font-weight: 800;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.final-cta-container p {
  opacity: 0.95;
  margin-bottom: 2rem;
  font-size: 1.05rem;
}

/* === 17. Footer === */
footer {
  padding: 4rem 2rem;
  text-align: center;
  background: var(--bg-secondary);
  border-top: none;
}

.footer-logo-img {
  height: 38px;
  width: auto;
  margin: 0 auto 1rem;
}

.footer-logo-dark {
  display: none;
}

[data-theme="dark"] .footer-logo-light {
  display: none;
}

[data-theme="dark"] .footer-logo-dark {
  display: block;
}

.footer-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--primary);
}

.footer-copy {
  color: var(--text-muted);
  font-size: 0.82rem;
}

@media (max-width: 768px) {
  .footer-links {
    flex-direction: column;
    gap: 0.75rem;
  }
}

/* Animation helpers */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* === 18. AI Showcase Tabs Section === */
#ai-showcase {
  background: var(--bg-primary);
  padding: 6rem 0;
  position: relative;
  overflow: hidden;
}

.showcase-tabs-container {
  width: 100%;
}

.showcase-tabs {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 3rem;
  overflow-x: auto;
  padding: 0.5rem;
  scrollbar-width: none; /* Firefox */
}

.showcase-tabs::-webkit-scrollbar {
  display: none; /* Chrome, Safari, Opera */
}

.showcase-tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.5rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(0, 97, 255, 0.1);
  background: var(--glass-bg);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-normal);
}

.showcase-tab-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-1px);
}

.showcase-tab-btn.active {
  background: var(--gradient);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 8px 20px rgba(0, 97, 255, 0.25);
}

.showcase-panes {
  position: relative;
  width: 100%;
}

.showcase-pane {
  display: none;
  padding: 3rem;
  border-radius: var(--radius-2xl);
  border: 1px solid rgba(0, 97, 255, 0.08);
}

.showcase-pane.active {
  display: block;
  animation: fadeInPane 0.5s ease forwards;
}

@keyframes fadeInPane {
  from {
    opacity: 0;
    transform: translateY(15px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.showcase-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3.5rem;
  align-items: center;
}

.showcase-tag-small {
  display: inline-block;
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 0.75rem;
}

.showcase-text h3 {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 1.25rem;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.showcase-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.showcase-benefits {
  list-style: none;
  margin-bottom: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.showcase-benefits li {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.5;
}

.showcase-benefits-icon {
  color: #10b981;
  flex-shrink: 0;
  margin-top: 0.15rem;
  font-weight: bold;
}

.showcase-scenario {
  background: var(--gradient-soft);
  border-left: 4px solid var(--primary);
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-md);
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.showcase-scenario strong {
  color: var(--primary);
}

.showcase-visual-wrap {
  width: 100%;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  border: 1px solid rgba(0, 97, 255, 0.12);
  aspect-ratio: 4/3;
}

.showcase-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}

.showcase-visual-wrap:hover .showcase-img {
  transform: scale(1.03);
}

@media (max-width: 1024px) {
  .showcase-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  
  .showcase-pane {
    padding: 2rem;
  }
  
  .showcase-visual-wrap {
    aspect-ratio: 16/9;
  }
  
  .showcase-tabs {
    justify-content: flex-start;
    padding-left: 1rem;
    padding-right: 1rem;
  }
}

@media (max-width: 768px) {
  #ai-showcase {
    padding: 4rem 0;
  }
  
  .showcase-text h3 {
    font-size: 1.5rem;
  }
  
  .showcase-pane {
    padding: 1.5rem;
    border-radius: var(--radius-xl);
  }
}