/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  scrollbar-width: none; /* Firefox */
  -ms-overflow-style: none; /* IE and Edge */
}

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

:root {
  /* Refined Color Palette */
  --primary-blue: #4a9eff;
  --primary-blue-dark: #357ae8;
  --primary-blue-light: #87bfff;
  --accent-blue: #3b82f6;
  --accent-cyan: #06b6d4;
  
  /* Background Colors */
  --bg-white: #ffffff;
  --bg-white-blue: #d7eaff;
  --bg-light: #f8fafc;
  --bg-gray: #f1f5f9;
  --bg-gradient-start: #ffffff;
  --bg-gradient-end: #f8fafc;
  
  /* Text Colors */
  --text-dark: #0f172a;
  --text-medium: #334155;
  --text-gray: #64748b;
  --text-light: #94a3b8;
  
  /* Border & Divider */
  --border-color: #e2e8f0;
  --border-light: #f1f5f9;
  
  /* Status Colors */
  --success-bg: #d1fae5;
  --success-text: #065f46;
  --error-bg: #fee2e2;
  --error-text: #991b1b;
  
  /* Shadow System - More Refined */
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.08), 0 1px 2px -1px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
  --shadow-colored: 0 10px 30px -10px rgba(99, 102, 241, 0.3);
  
  /* Animation Variables */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base-2: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Spacing Scale */
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 6rem;
  --spacing-5xl: 8rem;
  
  /* Typography Scale */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  --font-size-6xl: 3.75rem;
  
  /* Line Heights */
  --line-height-tight: 1.25;
  --line-height-snug: 1.375;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
}

html {
  scroll-behavior: smooth;
  scrollbar-width: none; /* Firefox */
  -ms-overflow-style: none; /* IE and Edge */
}

html::-webkit-scrollbar {
  display: none; /* Chrome, Safari, Opera */
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: linear-gradient(180deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
  background-attachment: fixed;
  color: var(--text-dark);
  line-height: var(--line-height-relaxed);
  overflow-x: hidden;
  font-size: var(--font-size-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scrollbar-width: none; /* Firefox */
  -ms-overflow-style: none; /* IE and Edge */
}

body::-webkit-scrollbar {
  display: none; /* Chrome, Safari, Opera */
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Navigation Bar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(226, 232, 240, 0.5);
  z-index: 1000;
  transition: all var(--transition-base);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-sm);
  border-bottom-color: var(--border-color);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-dark);
  text-decoration: none;
  letter-spacing: -0.02em;
  transition: transform var(--transition-fast);
}

.nav-logo:hover {
  transform: translateY(-1px);
}

.logo-img {
  width: 36px;
  height: 36px;
  transition: transform var(--transition-base);
}

.nav-logo:hover .logo-img {
  transform: scale(1.05);
}

.logo-text {
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.btn-cta-nav {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
  color: white;
  text-decoration: none;
  border-radius: 10px;
  font-weight: 600;
  font-size: var(--font-size-sm);
  letter-spacing: -0.01em;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-colored);
  position: relative;
  overflow: hidden;
}

.btn-cta-nav::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left var(--transition-slow);
}

.btn-cta-nav:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px -10px rgba(99, 102, 241, 0.4);
}

.btn-cta-nav:hover::before {
  left: 100%;
}

.btn-cta-nav:active {
  transform: translateY(0);
}

.browser-logo-icon {
  width: 20px;
  height: 20px;
  object-fit: contain;
  flex-shrink: 0;
}

.browser-logo-icon-large {
  width: 24px;
  height: 24px;
}

/* Animation Keyframes */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Scroll Animation Classes */
.fade-in-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Slide from Left Animation */
.slide-scale-left {
  opacity: 0;
  transform: translateX(-100px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}

.slide-scale-left.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Cascade Animation for Steps */
.cascade-in {
  opacity: 0;
  transform: translateY(50px) scale(0.95);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}

.cascade-in.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

/* Zoom-Bounce Animation */
.zoom-bounce {
  opacity: 0;
  transform: scale(0);
  will-change: transform, opacity;
}

.zoom-bounce.visible {
  animation: zoomBounce 0.8s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

@keyframes zoomBounce {
  0% {
    opacity: 0;
    transform: scale(0);
  }
  60% {
    opacity: 1;
    transform: scale(1.1);
  }
  80% {
    transform: scale(0.95);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  .slide-scale-left,
  .cascade-in,
  .zoom-bounce {
    animation: none !important;
    transition: opacity 0.3s ease !important;
    transform: none !important;
  }
  
  .slide-scale-left.visible,
  .cascade-in.visible,
  .zoom-bounce.visible {
    opacity: 1 !important;
    transform: none !important;
    animation: none !important;
  }
}

/* Hero Section */
.hero {
  padding: 100px 0 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.08) 0%, transparent 70%);
  pointer-events: none;
  animation: fadeIn 2s ease;
}

.hero-headline {
  font-size: clamp(var(--font-size-4xl), 5vw, var(--font-size-6xl));
  font-weight: 800;
  margin-bottom: var(--spacing-md);
  line-height: var(--line-height-tight);
  letter-spacing: -0.04em;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
  z-index: 1;
  
  /* Animated gradient text effect */
  background: linear-gradient(
    120deg,
    var(--text-dark) 0%,
    var(--text-dark) 40%,
    var(--primary-blue) 50%,
    var(--primary-blue-light) 60%,
    var(--text-dark) 70%,
    var(--text-dark) 100%
  );
  background-size: 200% 100%;
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: gradient-shift 5s ease-in-out infinite;
}

@keyframes gradient-shift {
  0%, 100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

.hero-subheadline {
  font-size: clamp(var(--font-size-lg), 2vw, var(--font-size- xl));
  color: var(--text-gray);
  margin-bottom: var(--spacing-2xl);
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  line-height: var(--line-height-relaxed);
  font-weight: 400;
  position: relative;
  z-index: 1;
}

/* Demo Container */
.demo-container {
  background: var(--bg-white);
  border-radius: 24px;
  padding: 48px;
  box-shadow: var(--shadow-2xl);
  margin-bottom: var(--spacing-4xl);
  position: relative;
  z-index: 1;
  border: 1px solid var(--border-light);
  backdrop-filter: blur(10px);
}

.demo-panes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}

.demo-pane {
  display: flex;
  flex-direction: column;
}

.demo-label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-medium);
  margin-bottom: 12px;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  font-size: 11px;
}

.textarea-wrapper {
  position: relative;
}

.demo-textarea {
  width: 100%;
  padding: 20px;
  padding-bottom: 60px;
  border: 2px solid var(--border-color);
  border-radius: 12px;
  font-size: var(--font-size-base);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  resize: vertical;
  transition: all var(--transition-base);
  background: var(--bg-white);
  color: var(--text-dark);
  line-height: var(--line-height-relaxed);
  min-height: 180px;
  scrollbar-width: none; /* Firefox */
  -ms-overflow-style: none; /* IE and Edge */
}

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

.demo-textarea:focus {
  outline: none;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
  transform: translateY(-1px);
}

.demo-textarea[readonly] {
  background: var(--bg-light);
  cursor: default;
}

.demo-textarea::placeholder {
  color: var(--text-light);
}

.prompt-examples {
  position: absolute;
  bottom: 12px;
  left: 12px;
  right: 12px;
  display: flex;
  gap: 8px;
  padding: 8px; 
  flex-wrap: wrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.textarea-wrapper:has(.demo-textarea:placeholder-shown) .prompt-examples,
.textarea-wrapper:has(.demo-textarea:empty) .prompt-examples {
  opacity: 1;
  pointer-events: all;
}

.textarea-wrapper:has(.demo-textarea:focus:not(:placeholder-shown)) .prompt-examples,
.textarea-wrapper:has(.demo-textarea:not(:placeholder-shown):not(:empty)) .prompt-examples {
  opacity: 0;
  pointer-events: none;
}

.example-btn {
  padding: 6px 12px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: 9999px;
  font-size: var(--font-size-xs);
  color: var(--text-medium);
  cursor: pointer;
  transition: all var(--transition-base);
  font-weight: 500;
  letter-spacing: -0.01em;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.example-btn:hover {
  background: var(--bg-white-blue );
  border-color: var(--primary-blue-light);
  color: var(--primary-blue);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.example-btn:active {
  transform: translateY(0);
}

.demo-actions {
  margin-top: 16px;
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: var(--bg-gray);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: var(--font-size-sm);
  color: var(--text-medium);
  cursor: pointer;
  transition: all var(--transition-base);
  font-weight: 500;
}

.copy-btn:hover {
  background: var(--primary-blue);
  color: white;
  border-color: var(--primary-blue);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.copy-btn:active {
  transform: translateY(0);
}

.demo-controls {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.btn-optimize {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 18px 56px;
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
  color: white;
  border: none;
  border-radius: 14px;
  font-size: var(--font-size-lg);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-colored);
  min-width: 200px;
  position: relative;
  overflow: hidden;
  letter-spacing: -0.01em;
}

.btn-optimize::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left var(--transition-slow);
}

.btn-optimize:hover:not(:disabled) {
  transform: translateY(-3px);
  box-shadow: 0 16px 48px -10px rgba(99, 102, 241, 0.5);
}

.btn-optimize:hover:not(:disabled)::before {
  left: 100%;
}

.btn-optimize:active:not(:disabled) {
  transform: translateY(-1px);
}

.btn-optimize:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.pulsing-dots {
  display: flex;
  gap: 6px;
  align-items: center;
}

.pulsing-dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
  animation: pulse 1.4s ease-in-out infinite;
}

.pulsing-dots span:nth-child(2) {
  animation-delay: 0.2s;
}

.pulsing-dots span:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes pulse {
  0%, 80%, 100% {
    opacity: 0.3;
    transform: scale(0.8);
  }
  40% {
    opacity: 1;
    transform: scale(1);
  }
}

.demo-counter {
  font-size: var(--font-size-sm);
  color: var(--text-gray);
  font-weight: 500;
}

.demo-error {
  padding: 20px;
  background: var(--error-bg);
  border: 1px solid #fca5a5;
  border-radius: 12px;
  color: var(--error-text);
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-lg);
  font-weight: 500;
  animation: slideUp 0.3s ease;
}

/* Platforms */
.platforms {
  margin-top: var(--spacing-4xl);
  position: relative;
  z-index: 1;
}

.platforms-text {
  font-size: var(--font-size-sm);
  color: var(--text-gray);
  margin-bottom: 24px;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  font-size: 11px;
}

.platform-logos {
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
}

.platform-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  color: var(--text-gray);
  font-size: var(--font-size-sm);
  font-weight: 500;
  padding: 12px;
  border-radius: 12px;
}

.platform-logo-img {
  width: 58px;
  height: 58px;
  object-fit: contain;
  opacity: 1;
}

/* Seamless CTA Button */
.seamless-cta-wrapper {
  position: relative;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-4xl);
  margin-bottom: calc(-1 * var(--spacing-2xl));
  z-index: 10;
}

.seamless-cta-wrapper .cta-microcopy {
  margin: 0;
}

.btn-cta-seamless {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 40px;
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
  color: white;
  text-decoration: none;
  border-radius: 12px;
  font-size: var(--font-size-lg);
  font-weight: 700;
  transition: all var(--transition-base);
  box-shadow: 0 4px 16px rgba(74, 158, 255, 0.3);
  letter-spacing: -0.01em;
}

.btn-cta-seamless:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(74, 158, 255, 0.4);
}

.btn-cta-seamless:active {
  transform: translateY(0);
}

/* How It Works Section */
.how-it-works {
  padding-top: calc(var(--spacing-4xl) + var(--spacing-2xl));
  padding-bottom: var(--spacing-4xl);
  background: var(--bg-white);
  position: relative;
  overflow: hidden;
}

.how-it-works-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 50%, rgba(74, 158, 255, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 50%, rgba(59, 130, 246, 0.06) 0%, transparent 50%);
  animation: gradient-shift-bg 8s ease-in-out infinite;
  pointer-events: none;
}

@keyframes gradient-shift-bg {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

.section-headline {
  font-size: clamp(var(--font-size-3xl), 4vw, var(--font-size-5xl));
  font-weight: 800;
  text-align: center;
  margin-bottom: var(--spacing-4xl);
  color: var(--text-dark);
  line-height: var(--line-height-tight);
  letter-spacing: -0.03em;
  position: relative;
  z-index: 1;
}

.steps-wrapper {
  position: relative;
  z-index: 1;
}

.steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  position: relative;
}

.step {
  position: relative;
  text-align: center;
  padding: var(--spacing-2xl);
  border-radius: 24px;
  transition: all var(--transition-base);
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(226, 232, 240, 0.6);
  box-shadow: 
    0 4px 6px -1px rgba(0, 0, 0, 0.05),
    0 2px 4px -2px rgba(0, 0, 0, 0.05);
  min-width: 280px;
  animation: float-in 0.6s ease-out backwards;
}

.step:nth-child(1) {
  animation-delay: 0.1s;
}

.step:nth-child(3) {
  animation-delay: 0.3s;
}

.step:nth-child(5) {
  animation-delay: 0.5s;
}

@keyframes float-in {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.step:hover {
  transform: translateY(-8px) scale(1.02);
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 
    0 20px 25px -5px rgba(74, 158, 255, 0.15),
    0 8px 10px -6px rgba(74, 158, 255, 0.1),
    0 0 0 1px rgba(74, 158, 255, 0.2);
  border-color: rgba(74, 158, 255, 0.3);
}

.step-number {
  position: absolute;
  top: -16px;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--font-size-lg);
  box-shadow: 
    0 4px 12px rgba(74, 158, 255, 0.4),
    0 0 0 4px rgba(255, 255, 255, 1);
  z-index: 10;
}

.step-icon-wrapper {
  position: relative;
  width: 120px;
  height: 120px;
  margin: var(--spacing-xl) auto var(--spacing-xl);
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-icon-glow {
  position: absolute;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(74, 158, 255, 0.3) 0%, transparent 70%);
  border-radius: 50%;
  animation: glow-pulse 3s ease-in-out infinite;
  opacity: 0;
}

.step:hover .step-icon-glow {
  opacity: 1;
}

@keyframes glow-pulse {
  0%, 100% {
    transform: scale(0.9);
    opacity: 0.5;
  }
  50% {
    transform: scale(1.1);
    opacity: 0.8;
  }
}

.step-icon {
  position: relative;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(74, 158, 255, 0.12) 0%, rgba(59, 130, 246, 0.08) 100%);
  border-radius: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-blue);
  transition: all var(--transition-base);
  border: 2px solid rgba(74, 158, 255, 0.2);
  z-index: 2;
  animation: icon-float 4s ease-in-out infinite;
}

.step:nth-child(1) .step-icon {
  animation-delay: 0.5s;
}

.step:nth-child(3) .step-icon {
  animation-delay: 0.5s;
}

.step:nth-child(5) .step-icon {
  animation-delay: 0.5s;
}

@keyframes icon-float {
  0%, 100% {
    transform: translateY(0) rotate(0deg);
  }
  50% {
    transform: translateY(-8px) rotate(3deg);
  }
}

.step:hover .step-icon {
  transform: scale(1.1) rotate(5deg);
  background: linear-gradient(135deg, rgba(74, 158, 255, 0.2) 0%, rgba(59, 130, 246, 0.15) 100%);
  border: none;
  box-shadow: 
    0 8px 24px rgba(74, 158, 255, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

.step-icon svg {
  width: 56px;
  height: 56px;
}

.step-connector {
  position: relative;
  flex: 0 0 auto;
  width: 120px;
  height: 4px;
  margin: 0 var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.connector-line {
  position: absolute;
  width: 100%;
  height: 2px;
  background: var(--primary-blue);
  border-radius: 2px;
  opacity: 0.2;
  overflow: hidden;
}

.connector-line::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--primary-blue-light) 50%,
    transparent 100%
  );
  animation: flow-line 2s ease-in-out infinite;
}

@keyframes flow-line {
  0% {
    left: -100%;
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    left: 100%;
    opacity: 0;
  }
}


.step-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--text-dark);
  letter-spacing: -0.02em;
  position: relative;
  z-index: 2;
}

.step:hover .step-title {
  color: var(--primary-blue);
  transform: scale(1.05);
}

.step-description {
  font-size: var(--font-size-lg);
  color: var(--text-gray);
  line-height: var(--line-height-relaxed);
  position: relative;
  z-index: 2;
}

/* API Key Section */
.api-key-section {
  padding: var(--spacing-4xl) 0;
  background: var(--bg-light);
}

.api-key-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.api-subtitle {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: var(--spacing-xl);
  color: var(--text-dark);
  letter-spacing: -0.02em;
}

.benefit-item {
  display: flex;
  gap: 20px;
  margin-bottom: 20px;
  padding: 24px;
  background: var(--bg-white);
  border-radius: 16px;
  transition: all var(--transition-base);
  border: 1px solid var(--border-light);
}

.benefit-item:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-color);
}

.benefit-item svg {
  flex-shrink: 0;
  margin-top: 4px;
  stroke-width: 2.5;
  color: var(--primary-blue);
}

.benefit-item strong {
  display: block;
  margin-bottom: 8px;
  color: var(--text-dark);
  font-size: var(--font-size-lg);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.benefit-item p {
  color: var(--text-gray);
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
}

.api-key-steps {
  background: var(--bg-white);
  padding: 40px;
  border-radius: 20px;
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--border-light);
}

.steps-list {
  margin-left: 24px;
  margin-bottom: var(--spacing-xl);
  color: var(--text-dark);
  line-height: var(--line-height-relaxed);
}

.steps-list li {
  margin-bottom: 16px;
  font-size: var(--font-size-base);
}

.steps-list a {
  color: var(--primary-blue);
  text-decoration: none;
  font-weight: 600;
  transition: all var(--transition-fast);
  border-bottom: 1px solid transparent;
}

.steps-list a:hover {
  border-bottom-color: var(--primary-blue);
}

.gif-placeholder {  
  border-radius: 16px;
  padding: 0;
  overflow: hidden;
  position: relative;
  min-height: 300px;
  transition: all var(--transition-base-2);
}

.api-steps-carousel {
  width: 100%;
  position: relative;
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.carousel-slide {
  position: absolute;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
  box-sizing: border-box;
  opacity: 0;
  transform: translateX(100%);
  animation: slide-in-out 10s infinite;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}

.carousel-slide[data-slide="0"] {
  animation-delay: 0s;
}

.carousel-slide[data-slide="1"] {
  animation-delay: 2s;
}

.carousel-slide[data-slide="2"] {
  animation-delay: 4s;
}

.carousel-slide[data-slide="3"] {
  animation-delay: 6s;
}

.carousel-slide[data-slide="4"] {
  animation-delay: 8s;
}

.carousel-slide img {
  max-width: 100%;
  max-height: 100%;
  height: auto;
  border-radius: 16px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  transition: transform var(--transition-base);
}

.carousel-slide:hover img {
  transform: scale(1.02);
}

@keyframes slide-in-out {
  0% {
    opacity: 0;
    transform: translateX(100%);
  }
  2.5% {
    opacity: 1;
    transform: translateX(0);
  }
  17.5% {
    opacity: 1;
    transform: translateX(0);
  }
  20% {
    opacity: 0;
    transform: translateX(-100%);
  }
  100% {
    opacity: 0;
    transform: translateX(-100%);
  }
}

/* Pause animation on hover for better UX */
.gif-placeholder:hover .carousel-slide {
  animation-play-state: paused;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .gif-placeholder {
    min-height: 250px;
  }
  
  .carousel-slide {
    padding: 24px;
  }
}

/* FAQ Section */
.faq-section {
  padding: var(--spacing-4xl) 0;
  background: var(--bg-white);
}

.faq-list {
  max-width: 840px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-white);
  border-radius: 16px;
  margin-bottom: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: all var(--transition-base);
}

.faq-item:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border-color);
}

.faq-question {
  width: 100%;
  padding: 28px;
  background: none;
  border: none;
  text-align: left;
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-dark);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  transition: all var(--transition-base);
  letter-spacing: -0.01em;
}

.faq-question:hover {
  background: var(--bg-light);
  color: var(--primary-blue);
}

.faq-chevron {
  flex-shrink: 0;
  transition: transform var(--transition-base);
  color: var(--primary-blue);
  width: 24px;
  height: 24px;
}

.faq-item[aria-expanded="true"] .faq-chevron {
  transform: rotate(180deg);
}

.faq-item[aria-expanded="true"] .faq-question {
  background: var(--bg-light);
  color: var(--primary-blue);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow) var(--ease-out), padding var(--transition-base);
  padding: 0 28px;
}

.faq-item[aria-expanded="true"] .faq-answer {
  max-height: 500px;
  padding: 0 28px 28px;
}

.faq-answer p {
  color: var(--text-gray);
  line-height: var(--line-height-relaxed);
  font-size: var(--font-size-base);
}

/* Final CTA Section */
.final-cta {
  padding: var(--spacing-5xl) 0;
  background: linear-gradient(180deg, var(--bg-white) 0%, var(--bg-light) 100%);
  text-align: center;
  color: var(--text-dark);
  position: relative;
  overflow: hidden;
}

.final-cta-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 30%, rgba(74, 158, 255, 0.06) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(59, 130, 246, 0.04) 0%, transparent 50%);
  animation: gradient-shift-cta 12s ease-in-out infinite;
  pointer-events: none;
}

@keyframes gradient-shift-cta {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.8;
    transform: scale(1.05);
  }
}

.final-cta-pattern {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle at 1px 1px, rgba(74, 158, 255, 0.08) 1px, transparent 0);
  background-size: 40px 40px;
  opacity: 0.3;
  pointer-events: none;
}

.final-cta-content {
  position: relative;
  z-index: 1;
  max-width: full;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.cta-preheadline {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--primary-blue);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-md);
  position: relative;
  display: inline-block;
}

.cta-preheadline::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary-blue), transparent);
}

.cta-headline {
  font-size: clamp(var(--font-size-3xl), 4vw, var(--font-size-5xl));
  font-weight: 800;
  margin: 0 0 var(--spacing-2xl) 0;
  line-height: var(--line-height-tight);
  letter-spacing: -0.02em;
  color: var(--text-dark);
  background: linear-gradient(135deg, var(--text-dark) 0%, var(--primary-blue-dark) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}

.cta-subheadline {
  font-size: var(--font-size-lg);
  color: var(--text-gray);
  margin-bottom: var(--spacing-2xl);
  line-height: var(--line-height-relaxed);
  font-weight: 400;
}

.btn-cta-large {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 16px 40px;
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
  color: white;
  text-decoration: none;
  border-radius: 12px;
  font-size: var(--font-size-lg);
  font-weight: 700;
  transition: all var(--transition-base);
  box-shadow: 0 4px 16px rgba(74, 158, 255, 0.3);
  margin: 0 0 var(--spacing-md) 0;
  letter-spacing: -0.01em;
}

.btn-cta-large:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(74, 158, 255, 0.4);
}

.btn-cta-large:active {
  transform: translateY(0);
}

.cta-microcopy {
  font-size: var(--font-size-sm);
  color: var(--text-gray);
  margin: 0;
  letter-spacing: 0.01em;
  line-height: var(--line-height-normal);
  opacity: 0.8;
}

/* Footer */
.footer {
  padding: var(--spacing-4xl) 0 var(--spacing-2xl);
  background: var(--text-dark);
  color: white;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-2xl);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 16px;
}

.footer-logo {
  width: 48px;
  height: 48px;
  transition: transform var(--transition-base);
}

.footer-brand:hover .footer-logo {
  transform: scale(1.05);
}

.footer-name {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: 4px;
  letter-spacing: -0.02em;
}

.footer-slogan {
  font-size: var(--font-size-sm);
  opacity: 0.75;
}

.footer-links {
  display: flex;
  gap: 32px;
}

.footer-link {
  color: white;
  text-decoration: none;
  font-size: var(--font-size-base);
  opacity: 0.75;
  transition: all var(--transition-fast);
  font-weight: 500;
}

.footer-link:hover {
  opacity: 1;
  transform: translateY(-1px);
}

.footer-disclaimer {
  padding-top: var(--spacing-2xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  font-size: var(--font-size-xs);
  opacity: 0.6;
  line-height: var(--line-height-relaxed);
}

/* Responsive Design */
@media (max-width: 1024px) {
  .step {
    min-width: 240px;
    padding: var(--spacing-xl);
  }
  
  .step-connector {
    width: 80px;
  }
  
  .api-key-content {
    gap: 48px;
  }
  
  .demo-panes {
    gap: 24px;
  }
}

@media (max-width: 768px) {
  .hero {
    padding: 80px 0 60px;
  }
  
  .demo-container {
    padding: 32px;
  }
  
  .demo-panes {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .steps {
    flex-direction: column;
    gap: 0;
  }
  
  .step {
    min-width: 100%;
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
  }
  
  .step-connector {
    width: 4px;
    height: 60px;
    margin: var(--spacing-md) auto;
    flex-direction: column;
  }
  
  .connector-line {
    width: 2px;
    height: 100%;
    background: var(--primary-blue);
  }
  
  .connector-line::before {
    width: 100%;
    height: 60%;
    background: linear-gradient(
      180deg,
      transparent 0%,
      var(--primary-blue-light) 50%,
      transparent 100%
    );
    animation: flow-line-vertical 2s ease-in-out infinite;
  }
  
  @keyframes flow-line-vertical {
    0% {
      top: -100%;
      opacity: 0;
    }
    50% {
      opacity: 1;
    }
    100% {
      top: 100%;
      opacity: 0;
    }
  }
  
  .api-key-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .platform-logos {
    gap: 32px;
  }
  
  .seamless-cta-wrapper {
    margin-top: var(--spacing-3xl);
    margin-bottom: calc(-1 * var(--spacing-xl));
  }
  
  .btn-cta-seamless {
    padding: 14px 32px;
    font-size: var(--font-size-base);
  }
  
  .final-cta {
    padding: var(--spacing-3xl) 0;
  }
  
  .final-cta-content {
    max-width: 100%;
    padding: 0 var(--spacing-lg);
  }
  
  .cta-headline {
    margin-bottom: var(--spacing-xl);
    font-size: clamp(var(--font-size-2xl), 3.5vw, var(--font-size-4xl));
  }
  
  .btn-cta-large {
    padding: 14px 32px;
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-md);
  }
  
  .final-cta {
    padding: var(--spacing-4xl) 0;
  }
  
  .footer-content {
    flex-direction: column;
    gap: var(--spacing-xl);
    text-align: center;
  }
  
  .footer-links {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .api-key-steps {
    padding: 32px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 20px;
  }
  
  .nav-container {
    padding: 16px 20px;
  }
  
  .btn-cta-nav {
    padding: 10px 20px;
    font-size: var(--font-size-xs);
  }
  
  .hero {
    padding: 70px 0 50px;
  }
  
  .demo-container {
    padding: 24px;
  }
  
  .btn-optimize {
    padding: 16px 40px;
    font-size: var(--font-size-base);
    min-width: 180px;
  }
  
  .prompt-examples {
    flex-direction: column;
  }
  
  .example-btn {
    width: 100%;
    text-align: center;
  }
  
  .seamless-cta-wrapper {
    margin-top: var(--spacing-2xl);
    margin-bottom: calc(-1 * var(--spacing-lg));
  }
  
  .btn-cta-seamless {
    padding: 12px 24px;
    font-size: var(--font-size-sm);
    gap: 8px;
  }
  
  .final-cta {
    padding: var(--spacing-2xl) 0;
  }
  
  .final-cta-content {
    padding: 0 var(--spacing-md);
  }
  
  .cta-headline {
    margin-bottom: var(--spacing-lg);
    white-space: normal;
    font-size: clamp(var(--font-size-xl), 5vw, var(--font-size-3xl));
  }
  
  .btn-cta-large {
    padding: 14px 28px;
    font-size: var(--font-size-sm);
    width: 100%;
    max-width: 280px;
    margin-bottom: var(--spacing-sm);
  }
  
  .final-cta {
    padding: var(--spacing-3xl) 0;
  }
  
  .cta-microcopy {
    font-size: var(--font-size-xs);
  }
  
  .step {
    padding: var(--spacing-lg);
    max-width: 100%;
  }
  
  .step-icon-wrapper {
    width: 100px;
    height: 100px;
  }
  
  .step-icon svg {
    width: 48px;
    height: 48px;
  }
  
  .step-number {
    width: 36px;
    height: 36px;
    font-size: var(--font-size-base);
  }
  
  .api-key-steps {
    padding: 24px;
  }
  
  .benefit-item {
    padding: 20px;
  }
}

/* Test Modal Button */
.btn-test-modal:hover {
  background: var(--primary-blue);
  color: white;
  border-color: var(--primary-blue);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn-test-modal:active {
  transform: translateY(0);
}

/* Quota Limit Modal */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 23, 42, 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  transition: opacity var(--transition-base);
  animation: fadeIn 0.3s ease forwards;
}

.modal-backdrop.hidden {
  display: none !important;
}

.modal {
  position: relative;
  background: var(--bg-white);
  border-radius: 20px;
  box-shadow: var(--shadow-2xl);
  max-width: 500px;
  width: 100%;
  padding: 0;
  z-index: 10000;
  transform: scale(0.95) translateY(20px);
  opacity: 0;
  animation: modalFadeIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
  border: 1px solid var(--border-light);
}

@keyframes modalFadeIn {
  from {
    opacity: 0;
    transform: scale(0.95) translateY(20px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-gray);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  color: var(--text-medium);
  transition: all var(--transition-fast);
  z-index: 1;
  padding: 0;
}

.modal-close:hover {
  background: var(--error-bg);
  color: var(--error-text);
  transform: scale(1.1);
}

.modal-close:active {
  transform: scale(0.95);
}

.modal-close svg {
  width: 20px;
  height: 20px;
}

.modal-content {
  padding: 48px 40px;
  text-align: center;
}

.modal-title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.02em;
  line-height: var(--line-height-tight);
}

.modal-message {
  font-size: var(--font-size-lg);
  color: var(--text-gray);
  margin-bottom: var(--spacing-2xl);
  line-height: var(--line-height-relaxed);
}

.modal-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 16px 32px;
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
  color: white;
  text-decoration: none;
  border-radius: 12px;
  font-size: var(--font-size-lg);
  font-weight: 600;
  transition: all var(--transition-base);
  box-shadow: 0 4px 16px rgba(74, 158, 255, 0.3);
  letter-spacing: -0.01em;
  position: relative;
  overflow: hidden;
}

.modal-cta-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left var(--transition-slow);
}

.modal-cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(74, 158, 255, 0.4);
}

.modal-cta-btn:hover::before {
  left: 100%;
}

.modal-cta-btn:active {
  transform: translateY(0);
}

/* Prevent body scroll when modal is open */
body.modal-open {
  overflow: hidden;
}

/* Responsive modal styles */
@media (max-width: 768px) {
  .modal-backdrop {
    padding: 16px;
  }
  
  .modal {
    max-width: 100%;
    border-radius: 16px;
  }
  
  .modal-content {
    padding: 40px 32px;
  }
  
  .modal-title {
    font-size: var(--font-size-2xl);
  }
  
  .modal-message {
    font-size: var(--font-size-base);
  }
  
  .modal-cta-btn {
    padding: 14px 28px;
    font-size: var(--font-size-base);
    width: 100%;
  }
  
  .modal-close {
    top: 16px;
    right: 16px;
    width: 32px;
    height: 32px;
  }
}

@media (max-width: 480px) {
  .modal-content {
    padding: 32px 24px;
  }
  
  .modal-title {
    font-size: var(--font-size-xl);
  }
  
  .modal-message {
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-xl);
  }
}