/* ===================================
   CSS Variables
   =================================== */
:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --secondary: #0ea5e9;
  --accent: #8b5cf6;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;

  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;

  --white: #ffffff;
  --black: #000000;

  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

  --border-radius-sm: 0.375rem;
  --border-radius-md: 0.5rem;
  --border-radius-lg: 0.75rem;
  --border-radius-xl: 1rem;
  --border-radius-2xl: 1.5rem;
  --border-radius-full: 9999px;
}

/* ===================================
   Reset & Base Styles
   =================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--white);
  color: var(--gray-900);
  line-height: 1.6;
  overflow-x: hidden;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  transition: all var(--transition-base);
}

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

/* ===================================
   Utility Classes
   =================================== */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
}

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

/* ===================================
   Buttons
   =================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--border-radius-lg);
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn-large {
  padding: 1rem 2rem;
  font-size: 1rem;
  border-radius: var(--border-radius-xl);
}

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

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

.btn-secondary {
  background: var(--gray-100);
  color: var(--gray-900);
}

.btn-secondary:hover {
  background: var(--gray-200);
}

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

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

/* ===================================
   Navigation
   =================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--gray-200);
  padding: 1rem 0;
  animation: slideDown 0.5s ease;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-100%);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
}

.logo-icon {
  font-size: 1.5rem;
  animation: float 3s ease-in-out infinite;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  color: var(--gray-700);
  font-weight: 500;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-base);
}

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

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

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 0.5rem;
}

.mobile-menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--gray-900);
  border-radius: 2px;
  transition: all var(--transition-base);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 8rem 0 4rem;
  overflow: hidden;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: -1;
  overflow: hidden;
}

.gradient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.6;
  animation: pulse 8s ease-in-out infinite;
}

.orb-1 {
  top: -10%;
  right: -5%;
  width: 500px;
  height: 500px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  animation-delay: 0s;
}

.orb-2 {
  bottom: -20%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  animation-delay: 2s;
}

.orb-3 {
  top: 50%;
  left: 50%;
  width: 400px;
  height: 400px;
  background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  animation-delay: 4s;
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
    opacity: 0.6;
  }
  50% {
    transform: scale(1.1);
    opacity: 0.8;
  }
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-content {
  animation: fadeInUp 0.8s ease;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--gray-100);
  border-radius: var(--border-radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-700);
  margin-bottom: 1.5rem;
  animation: fadeInUp 0.8s ease 0.2s both;
}

.badge-icon {
  animation: rotate 2s linear infinite;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
  animation: fadeInUp 0.8s ease 0.3s both;
}

.hero-description {
  font-size: 1.25rem;
  color: var(--gray-600);
  margin-bottom: 2rem;
  line-height: 1.7;
  animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  margin-bottom: 3rem;
  animation: fadeInUp 0.8s ease 0.5s both;
}

.hero-stats {
  display: flex;
  gap: 3rem;
  animation: fadeInUp 0.8s ease 0.6s both;
}

.stat {
  text-align: left;
}

.stat-value {
  font-size: 2rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--gray-600);
  font-weight: 500;
}

.hero-visual {
  animation: fadeInUp 0.8s ease 0.4s both;
  position: relative;
}

.mockup-container {
  position: relative;
  animation: float 6s ease-in-out infinite;
}

.mockup-window {
  background: var(--white);
  border-radius: var(--border-radius-2xl);
  box-shadow: var(--shadow-2xl);
  overflow: hidden;
  border: 1px solid var(--gray-200);
}

.window-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--gray-50);
  border-bottom: 1px solid var(--gray-200);
}

.window-dots {
  display: flex;
  gap: 0.5rem;
}

.window-dots span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.window-dots span:nth-child(1) { background: #ff5f57; }
.window-dots span:nth-child(2) { background: #ffbd2e; }
.window-dots span:nth-child(3) { background: #28ca42; }

.window-title {
  font-size: 0.875rem;
  color: var(--gray-600);
}

.window-content {
  background: var(--white);
  padding: 2rem;
  min-height: 400px;
}

.docs-toolbar {
  height: 40px;
  background: var(--gray-100);
  border-radius: var(--border-radius-md);
  margin-bottom: 2rem;
}

.docs-page {
  background: var(--white);
  padding: 2rem;
  border-radius: var(--border-radius-lg);
  min-height: 300px;
}

.typing-animation {
  position: relative;
}

.cursor {
  display: inline-block;
  width: 2px;
  height: 24px;
  background: var(--gray-900);
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

.floating-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.5rem;
  background: var(--white);
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--gray-200);
  animation: float 4s ease-in-out infinite;
}

.card-1 {
  top: 10%;
  right: -10%;
  animation-delay: 0.5s;
}

.card-2 {
  bottom: 15%;
  left: -15%;
  animation-delay: 1s;
}

.card-icon {
  font-size: 1.5rem;
}

.card-text {
  font-weight: 600;
  color: var(--gray-700);
}

/* ===================================
   Features Section
   =================================== */
.features {
  padding: 6rem 0;
  background: var(--gray-50);
}

.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 4rem;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.section-description {
  font-size: 1.125rem;
  color: var(--gray-600);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.feature-card {
  background: var(--white);
  padding: 2rem;
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--gray-200);
  transition: all var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-light);
}

.feature-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: var(--border-radius-xl);
  color: var(--white);
  margin-bottom: 1.5rem;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.feature-description {
  color: var(--gray-600);
  line-height: 1.7;
}

/* ===================================
   How It Works Section
   =================================== */
.how-it-works {
  padding: 6rem 0;
}

.steps {
  display: flex;
  flex-direction: column;
  gap: 3rem;
  max-width: 900px;
  margin: 0 auto;
}

.step {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 2rem;
  align-items: center;
  padding: 2rem;
  background: var(--white);
  border-radius: var(--border-radius-xl);
  border: 2px solid var(--gray-200);
  transition: all var(--transition-base);
}

.step:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
}

.step-number {
  font-size: 3rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.step-content {
  flex: 1;
}

.step-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.step-description {
  color: var(--gray-600);
  line-height: 1.7;
}

.step-visual {
  width: 80px;
  height: 80px;
}

.step-icon {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gray-50);
  border-radius: var(--border-radius-xl);
  color: var(--primary);
}

/* ===================================
   FAQ Section
   =================================== */
.faq {
  padding: 6rem 0;
  background: var(--gray-50);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background: var(--white);
  border-radius: var(--border-radius-xl);
  border: 1px solid var(--gray-200);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem;
  text-align: left;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--gray-900);
  cursor: pointer;
}

.faq-question:hover {
  background: var(--gray-50);
}

.faq-icon {
  transition: transform var(--transition-base);
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

.faq-answer p {
  padding: 0 1.5rem 1.5rem;
  color: var(--gray-600);
  line-height: 1.7;
}

/* ===================================
   CTA Section
   =================================== */
.cta {
  padding: 6rem 0;
  background: var(--gradient-primary);
  color: var(--white);
  text-align: center;
}

.cta-content {
  max-width: 700px;
  margin: 0 auto;
}

.cta-title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.cta-description {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  opacity: 0.9;
}

/* ===================================
   Footer
   =================================== */
.footer {
  padding: 3rem 0;
  background: var(--gray-900);
  color: var(--gray-400);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--gray-800);
  margin-bottom: 2rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--white);
}

.footer-links {
  display: flex;
  gap: 2rem;
}

.footer-links a {
  color: var(--gray-400);
  font-weight: 500;
  transition: color var(--transition-base);
}

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

.footer-bottom {
  text-align: center;
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .hero-visual {
    order: -1;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .step-visual {
    justify-self: center;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 1rem;
  }

  .nav-links {
    position: fixed;
    top: 73px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--white);
    padding: 2rem;
    gap: 1.5rem;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-lg);
  }

  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translateY(8px);
  }

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

  .mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translateY(-8px);
  }

  .hero {
    padding: 6rem 0 3rem;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-description {
    font-size: 1.125rem;
  }

  .hero-cta {
    flex-direction: column;
  }

  .hero-stats {
    gap: 2rem;
  }

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

  .section-title {
    font-size: 2rem;
  }

  .cta-title {
    font-size: 2rem;
  }

  .footer-content {
    flex-direction: column;
    gap: 2rem;
    text-align: center;
  }

  .footer-links {
    flex-direction: column;
    gap: 1rem;
  }

  .floating-card {
    display: none;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }

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

/* ===================================
   Scroll Animations
   =================================== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease;
}

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