/* ========================================
   DESIGN SYSTEM & VARIABLES
   ======================================== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Outfit:wght@400;500;600;700;800&display=swap');

:root {
  /* Colors */
  --primary: #6C5CE7;
  --primary-light: #A29BFE;
  --primary-dark: #5A4BD1;
  --accent: #00CEC9;
  --accent-light: #55EFC4;
  --accent-dark: #00B5B1;
  --orange: #FF6B35;
  --pink: #FD79A8;
  --yellow: #FDCB6E;

  /* Dark palette */
  --bg-dark: #0A0A1A;
  --bg-card: #12122A;
  --bg-card-hover: #1A1A3E;
  --bg-glass: rgba(18, 18, 42, 0.7);
  --bg-glass-light: rgba(255, 255, 255, 0.05);

  /* Text */
  --text-primary: #FFFFFF;
  --text-secondary: rgba(255, 255, 255, 0.7);
  --text-muted: rgba(255, 255, 255, 0.4);

  /* Borders */
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-accent: rgba(108, 92, 231, 0.3);

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #6C5CE7 0%, #A29BFE 100%);
  --gradient-accent: linear-gradient(135deg, #00CEC9 0%, #55EFC4 100%);
  --gradient-hero: linear-gradient(135deg, #0A0A1A 0%, #1A1A3E 50%, #0A0A1A 100%);
  --gradient-card: linear-gradient(145deg, rgba(108, 92, 231, 0.1), rgba(0, 206, 201, 0.05));

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(108, 92, 231, 0.3);
  --shadow-glow-accent: 0 0 30px rgba(0, 206, 201, 0.3);

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Typography */
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Border radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========================================
   RESET & BASE
   ======================================== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-body);
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition-fast);
}

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

ul, ol { list-style: none; }

/* ========================================
   UTILITIES
   ======================================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.section {
  padding: var(--space-4xl) 0;
  position: relative;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  text-align: center;
  margin-bottom: var(--space-lg);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto var(--space-3xl);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.85rem 2rem;
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 50px rgba(108, 92, 231, 0.5);
}

.btn-outline {
  background: transparent;
  color: var(--primary-light);
  border: 2px solid var(--primary-light);
}

.btn-outline:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  transform: translateY(-2px);
}

.btn-accent {
  background: var(--gradient-accent);
  color: var(--bg-dark);
  font-weight: 700;
}

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow-accent);
}

/* Glass card */
.glass-card {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: var(--transition-base);
}

.glass-card:hover {
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* Reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ========================================
   NAVBAR
   ======================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--space-md) 0;
  transition: var(--transition-base);
}

.navbar.scrolled {
  background: rgba(10, 10, 26, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-md);
  padding: var(--space-sm) 0;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.nav-logo .logo-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient-primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
  position: relative;
  padding: var(--space-xs) 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  transition: var(--transition-base);
}

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

.nav-links a:hover::after {
  width: 100%;
}

.nav-cta {
  padding: 0.6rem 1.5rem !important;
  background: var(--gradient-primary);
  color: white !important;
  border-radius: var(--radius-full);
  font-weight: 600;
}

.nav-cta::after { display: none !important; }

.nav-cta:hover {
  box-shadow: var(--shadow-glow);
  transform: translateY(-1px);
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--space-sm);
}

.mobile-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: var(--radius-full);
  transition: var(--transition-fast);
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background: var(--gradient-hero);
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(108, 92, 231, 0.15) 0%, transparent 50%),
              radial-gradient(circle at 70% 50%, rgba(0, 206, 201, 0.1) 0%, transparent 50%);
  animation: heroGlow 8s ease-in-out infinite alternate;
}

@keyframes heroGlow {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-5%, 5%) scale(1.1); }
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(108, 92, 231, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(108, 92, 231, 0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero .container {
  position: relative;
  z-index: 2;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.5rem 1.25rem;
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  color: var(--accent-light);
  margin-bottom: var(--space-xl);
  backdrop-filter: blur(10px);
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: var(--space-lg);
  letter-spacing: -0.02em;
}

.hero h1 .gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero h1 .accent-text {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto var(--space-2xl);
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--space-3xl);
  margin-top: var(--space-4xl);
}

.hero-stat {
  text-align: center;
}

.hero-stat .number {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-stat .label {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: var(--space-xs);
}

/* Floating elements */
.floating-shapes {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}

.floating-shape {
  position: absolute;
  border-radius: var(--radius-lg);
  opacity: 0.15;
  animation: float 6s ease-in-out infinite;
}

.floating-shape:nth-child(1) {
  width: 80px;
  height: 80px;
  background: var(--primary);
  top: 20%;
  left: 10%;
  animation-delay: 0s;
}

.floating-shape:nth-child(2) {
  width: 60px;
  height: 60px;
  background: var(--accent);
  top: 60%;
  right: 15%;
  animation-delay: 2s;
  border-radius: 50%;
}

.floating-shape:nth-child(3) {
  width: 40px;
  height: 40px;
  background: var(--pink);
  bottom: 25%;
  left: 20%;
  animation-delay: 4s;
}

.floating-shape:nth-child(4) {
  width: 50px;
  height: 50px;
  background: var(--yellow);
  top: 15%;
  right: 25%;
  animation-delay: 1s;
  border-radius: 50%;
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(5deg); }
}

/* ========================================
   SERVICES SECTION
   ======================================== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-xl);
}

.service-card {
  text-align: center;
  padding: var(--space-2xl) var(--space-xl);
}

.service-icon {
  width: 70px;
  height: 70px;
  margin: 0 auto var(--space-lg);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  background: var(--gradient-card);
  border: 1px solid var(--border-glass);
}

.service-card h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
}

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

/* ========================================
   DEMOS / PORTFOLIO SECTION
   ======================================== */
.demos-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: var(--space-xl);
}

.demo-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  transition: var(--transition-base);
  cursor: pointer;
  position: relative;
}

.demo-card:hover {
  border-color: var(--primary);
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow);
}

.demo-thumbnail {
  width: 100%;
  height: 220px;
  overflow: hidden;
  position: relative;
}

.demo-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-slow);
}

.demo-card:hover .demo-thumbnail img {
  transform: scale(1.05);
}

.demo-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10, 10, 26, 0.9) 0%, transparent 60%);
  display: flex;
  align-items: flex-end;
  padding: var(--space-lg);
  opacity: 0;
  transition: var(--transition-base);
}

.demo-card:hover .demo-overlay {
  opacity: 1;
}

.demo-overlay .btn {
  font-size: 0.875rem;
  padding: 0.6rem 1.5rem;
}

.demo-info {
  padding: var(--space-lg);
}

.demo-tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: rgba(108, 92, 231, 0.15);
  color: var(--primary-light);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-sm);
}

.demo-info h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.demo-info p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ========================================
   PRICING SECTION
   ======================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
  align-items: start;
}

.pricing-card {
  text-align: center;
  padding: var(--space-2xl);
  position: relative;
}

.pricing-card.featured {
  border-color: var(--primary);
  background: linear-gradient(145deg, rgba(108, 92, 231, 0.15), rgba(0, 206, 201, 0.05));
  transform: scale(1.05);
}

.pricing-card.featured::before {
  content: 'PHỔ BIẾN';
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-primary);
  color: white;
  padding: 0.3rem 1.2rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.pricing-card h3 {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
  color: var(--text-secondary);
}

.pricing-price {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 900;
  margin-bottom: var(--space-xs);
}

.pricing-price .currency {
  font-size: 1.2rem;
  vertical-align: super;
  color: var(--text-muted);
}

.pricing-price .unit {
  font-size: 1rem;
  font-weight: 400;
  color: var(--text-muted);
}

.pricing-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: var(--space-xl);
}

.pricing-features {
  text-align: left;
  margin-bottom: var(--space-xl);
}

.pricing-features li {
  padding: var(--space-sm) 0;
  color: var(--text-secondary);
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.pricing-features li::before {
  content: '✓';
  color: var(--accent);
  font-weight: 700;
  font-size: 1rem;
}

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

/* ========================================
   PROCESS SECTION
   ======================================== */
.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-xl);
  position: relative;
}

.process-step {
  text-align: center;
  position: relative;
}

.step-number {
  width: 60px;
  height: 60px;
  margin: 0 auto var(--space-lg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--gradient-primary);
  color: white;
  position: relative;
  z-index: 2;
}

.process-step h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.process-step p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ========================================
   CONTACT SECTION
   ======================================== */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: start;
}

.contact-info h2 {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: var(--space-lg);
  line-height: 1.2;
}

.contact-info p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: var(--space-2xl);
  line-height: 1.7;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.contact-item .icon {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-md);
  background: var(--gradient-card);
  border: 1px solid var(--border-glass);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.contact-item .detail strong {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contact-item .detail p {
  color: var(--text-primary);
  font-size: 1rem;
  margin: 0;
}

.contact-form {
  padding: var(--space-2xl);
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.85rem 1rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: var(--transition-fast);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.15);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-group select option {
  background: var(--bg-card);
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border-glass);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer-brand .nav-logo {
  margin-bottom: var(--space-md);
}

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

.footer-col h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  margin-bottom: var(--space-lg);
  font-size: 1rem;
}

.footer-col a {
  display: block;
  color: var(--text-secondary);
  padding: var(--space-xs) 0;
  font-size: 0.9rem;
}

.footer-col a:hover {
  color: var(--primary-light);
  transform: translateX(4px);
}

.footer-bottom {
  border-top: 1px solid var(--border-glass);
  padding-top: var(--space-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-social {
  display: flex;
  gap: var(--space-md);
}

.footer-social a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-glass-light);
  border: 1px solid var(--border-glass);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: var(--transition-base);
}

.footer-social a:hover {
  background: var(--primary);
  border-color: var(--primary);
  transform: translateY(-2px);
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 968px) {
  .nav-links {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 10, 26, 0.98);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--space-xl);
    z-index: 999;
  }

  .nav-links.active {
    display: flex;
  }

  .nav-links a {
    font-size: 1.3rem;
  }

  .mobile-toggle {
    display: flex;
    z-index: 1001;
  }

  .mobile-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .mobile-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .mobile-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .hero-stats {
    gap: var(--space-xl);
  }

  .hero-stat .number {
    font-size: 2rem;
  }

  .contact-wrapper {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
  }

  .pricing-card.featured {
    transform: scale(1);
  }

  .demos-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .container {
    padding: 0 var(--space-md);
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero-stats {
    flex-direction: column;
    gap: var(--space-md);
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .process-steps {
    grid-template-columns: 1fr;
  }
}

/* ========================================
   DEMO PAGE BACK BUTTON
   ======================================== */
.back-to-main {
  position: fixed;
  top: 20px;
  left: 20px;
  z-index: 10000;
  padding: 0.6rem 1.2rem;
  background: rgba(10, 10, 26, 0.9);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-full);
  color: white;
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-base);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
}

.back-to-main:hover {
  background: var(--primary);
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}