/* ===== CSS Custom Properties ===== */
:root {
  /* Purple Color Scheme */
  --primary: 280 87% 65%; /* #A855F7 - Purple */
  --primary-dark: 280 87% 55%; /* #9333EA */
  --primary-light: 280 100% 95%; /* #FAF5FF */
  --secondary: 268 83% 58%; /* #8B5CF6 - Violet */
  --accent: 310 100% 69%; /* #F472B6 - Pink */
  --accent-dark: 310 100% 59%; /* #EC4899 */
  
  --background: 280 25% 98%; /* #FEFCFF */
  --surface: 0 0% 100%; /* #FFFFFF */
  --surface-dark: 260 20% 15%; /* #1F1827 */
  --surface-light: 280 50% 97%; /* #F9F7FF */
  
  --text-primary: 260 15% 25%; /* #3D3748 */
  --text-secondary: 260 10% 45%; /* #6B6477 */
  --text-muted: 260 8% 65%; /* #9B93A6 */
  --text-inverse: 0 0% 100%; /* #FFFFFF */
  
  --border: 280 20% 92%; /* #EDE8F5 */
  --border-hover: 280 25% 88%; /* #DDD1E8 */
  
  --success: 142 76% 36%; /* #10B981 */
  --warning: 38 92% 50%; /* #F59E0B */
  --error: 0 84% 60%; /* #EF4444 */
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, hsl(var(--primary)) 0%, hsl(var(--secondary)) 50%, hsl(var(--accent)) 100%);
  --gradient-secondary: linear-gradient(135deg, hsl(var(--secondary)) 0%, hsl(var(--accent)) 100%);
  --gradient-overlay: linear-gradient(135deg, rgba(168, 85, 247, 0.7) 0%, rgba(139, 92, 246, 0.6) 50%, rgba(244, 114, 182, 0.7) 100%);
  --gradient-subtle: linear-gradient(135deg, hsl(var(--primary-light)) 0%, hsl(var(--surface-light)) 100%);
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --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;
  
  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  
  /* Border radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  
  /* Shadows */
  --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);
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Container */
  --container-max-width: 1200px;
}

/* ===== Reset and Base Styles ===== */
* {
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: hsl(var(--text-primary));
  background-color: hsl(var(--background));
  margin: 0;
  padding: 0;
  overflow-x: hidden;
}

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

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

a:hover {
  color: hsl(var(--primary-dark));
}

/* ===== Utility Classes ===== */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

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

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ===== Navigation ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: hsla(0, 0%, 100%, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid hsl(var(--border));
  z-index: 1000;
  transition: all var(--transition-normal);
}

.nav.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) 0;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: var(--font-size-xl);
  color: hsl(var(--text-primary));
}

.nav-brand i {
  color: hsl(var(--primary));
  font-size: var(--font-size-2xl);
}

.nav-menu {
  display: flex;
  gap: var(--space-8);
}

.nav-link {
  font-weight: 500;
  color: hsl(var(--text-secondary));
  padding: var(--space-2) 0;
  position: relative;
  transition: color var(--transition-fast);
}

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

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

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

.nav-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: var(--space-1);
}

.bar {
  width: 25px;
  height: 3px;
  background-color: hsl(var(--text-primary));
  transition: var(--transition-normal);
}

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

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

.hero-gradient {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, 
    hsl(280, 60%, 25%) 0%,
    hsl(268, 70%, 35%) 30%,
    hsl(260, 65%, 30%) 60%,
    hsl(280, 70%, 20%) 100%);
}

.hero-content {
  text-align: center;
  color: hsl(var(--text-inverse));
  max-width: 800px;
  margin: 0 auto;
  animation: fadeInUp 1s ease-out;
}

.hero-title {
  font-size: var(--font-size-5xl);
  font-weight: 700;
  margin-bottom: var(--space-6);
  line-height: 1.1;
}

.hero-description {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-8);
  opacity: 0.95;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-buttons {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  margin-bottom: var(--space-16);
  flex-wrap: wrap;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  max-width: 500px;
  margin: 0 auto;
}

.stat {
  text-align: center;
}

.stat-number {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  margin-bottom: var(--space-1);
}

.stat-label {
  font-size: var(--font-size-sm);
  opacity: 0.8;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: var(--font-size-base);
  text-decoration: none;
  transition: all var(--transition-normal);
  border: 2px solid transparent;
  cursor: pointer;
  min-width: 150px;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: hsl(var(--text-inverse));
}

.btn-secondary {
  background: transparent;
  color: hsl(var(--text-inverse));
  border-color: hsla(0, 0%, 100%, 0.3);
}

.btn-secondary:hover {
  background: hsla(0, 0%, 100%, 0.1);
  color: hsl(var(--text-inverse));
}

.btn-outline {
  background: transparent;
  color: hsl(var(--primary));
  border-color: hsl(var(--primary));
}

.btn-outline:hover {
  background: hsl(var(--primary));
  color: hsl(var(--text-inverse));
}

/* ===== Section Headers ===== */
.section-header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section-header h2 {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  margin-bottom: var(--space-4);
  color: hsl(var(--text-primary));
}

.section-header p {
  font-size: var(--font-size-xl);
  color: hsl(var(--text-secondary));
  max-width: 600px;
  margin: 0 auto;
}

/* ===== Features Section ===== */
.features {
  padding: var(--space-24) 0;
  background: var(--gradient-subtle);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-8);
}

.feature-card {
  background: hsl(var(--surface));
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  border: 1px solid hsl(var(--border));
  transition: all var(--transition-normal);
  text-align: center;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: hsl(var(--border-hover));
}

.feature-icon {
  width: 80px;
  height: 80px;
  background: var(--gradient-secondary);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-6);
  box-shadow: var(--shadow-lg);
  transform: rotate(-5deg);
  transition: all var(--transition-normal);
}

.feature-card:hover .feature-icon {
  transform: rotate(0deg) scale(1.1);
}

.feature-icon i {
  font-size: var(--font-size-2xl);
  color: hsl(var(--text-inverse));
}

.feature-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--space-4);
  color: hsl(var(--text-primary));
}

.feature-card p {
  color: hsl(var(--text-secondary));
  line-height: 1.6;
}

/* ===== API Section ===== */
.api-section {
  padding: var(--space-24) 0;
  background: hsl(var(--background));
}

.api-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-12);
  align-items: start;
}

.api-card {
  background: hsl(var(--surface));
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  border: 1px solid hsl(var(--border));
  margin-bottom: var(--space-8);
}

.api-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--space-4);
  color: hsl(var(--text-primary));
}

.api-card p {
  color: hsl(var(--text-secondary));
  margin-bottom: var(--space-4);
}

.code-block {
  background: hsl(var(--surface-dark));
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid hsl(var(--border));
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3) var(--space-4);
  background: hsl(215 28% 14%); /* Darker than surface-dark */
  border-bottom: 1px solid hsl(var(--border));
}

.code-header span {
  font-size: var(--font-size-sm);
  color: hsl(var(--text-muted));
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.copy-btn {
  background: transparent;
  border: none;
  color: hsl(var(--text-muted));
  cursor: pointer;
  padding: var(--space-1);
  transition: color var(--transition-fast);
}

.copy-btn:hover {
  color: hsl(var(--accent));
}

.code-block code {
  display: block;
  padding: var(--space-4);
  color: hsl(var(--text-inverse));
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  font-size: var(--font-size-sm);
  line-height: 1.5;
  white-space: pre-wrap;
  word-wrap: break-word;
}

.api-params h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--space-6);
  color: hsl(var(--text-primary));
}

.params-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.param-item {
  background: hsl(var(--surface));
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  border: 1px solid hsl(var(--border));
}

.param-item strong {
  display: block;
  font-weight: 600;
  color: hsl(var(--primary));
  margin-bottom: var(--space-1);
}

.param-item span {
  color: hsl(var(--text-secondary));
  font-size: var(--font-size-sm);
}

/* ===== Pricing Section ===== */
.pricing {
  padding: var(--space-24) 0;
  background: hsl(var(--surface));
  position: relative;
}

.pricing::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 100%;
  background: var(--gradient-subtle);
  opacity: 0.3;
  z-index: -1;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-8);
  max-width: 1000px;
  margin: 0 auto;
}

.pricing-card {
  background: hsl(var(--surface));
  border: 2px solid hsl(var(--border));
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  text-align: center;
  position: relative;
  transition: all var(--transition-normal);
}

.pricing-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.pricing-card.featured {
  border: 2px solid transparent;
  background: linear-gradient(white, white) padding-box, var(--gradient-primary) border-box;
  transform: scale(1.05);
  box-shadow: var(--shadow-xl);
}

.pricing-card.featured:hover {
  transform: scale(1.05) translateY(-5px);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-primary);
  color: hsl(var(--text-inverse));
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  font-weight: 600;
}

.pricing-header h3 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: var(--space-4);
  color: hsl(var(--text-primary));
}

.price {
  display: flex;
  align-items: baseline;
  justify-content: center;
  margin-bottom: var(--space-8);
}

.currency {
  font-size: var(--font-size-xl);
  color: hsl(var(--text-secondary));
}

.amount {
  font-size: var(--font-size-5xl);
  font-weight: 700;
  color: hsl(var(--text-primary));
}

.period {
  font-size: var(--font-size-lg);
  color: hsl(var(--text-secondary));
}

.pricing-features {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-8) 0;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  color: hsl(var(--text-secondary));
}

.pricing-features i {
  color: hsl(var(--accent));
  font-size: var(--font-size-sm);
}

/* ===== Contact Section ===== */
.contact {
  padding: var(--space-24) 0;
  background: hsl(var(--background));
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}

.contact-info h2 {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  margin-bottom: var(--space-4);
  color: hsl(var(--text-primary));
}

.contact-info p {
  font-size: var(--font-size-lg);
  color: hsl(var(--text-secondary));
  margin-bottom: var(--space-8);
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.contact-method {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.contact-method i {
  width: 50px;
  height: 50px;
  background: var(--gradient-secondary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: hsl(var(--text-inverse));
  font-size: var(--font-size-lg);
  flex-shrink: 0;
  box-shadow: var(--shadow-md);
}

.contact-method strong {
  display: block;
  font-weight: 600;
  color: hsl(var(--text-primary));
  margin-bottom: var(--space-1);
}

.contact-method p {
  color: hsl(var(--text-secondary));
  margin: 0;
}

.contact-image {
  position: relative;
}

.contact-img {
  width: 100%;
  height: 400px;
  object-fit: cover;
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
}

/* ===== Footer ===== */
.footer {
  background: hsl(var(--surface-dark));
  color: hsl(var(--text-inverse));
  padding: var(--space-16) 0 var(--space-8);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-12);
}

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

.footer-description p {
  color: hsla(0, 0%, 100%, 0.7);
  margin: 0;
  font-size: var(--font-size-lg);
}

.footer-contact {
  text-align: right;
  margin-bottom: var(--space-4);
}

.footer-contact p {
  color: hsla(0, 0%, 100%, 0.7);
  margin: 0;
}

.footer-contact a {
  color: hsl(var(--accent));
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-contact a:hover {
  color: hsl(var(--accent-dark));
}

.footer-brand .nav-brand {
  color: hsl(var(--text-inverse));
  margin-bottom: var(--space-4);
}

.footer-brand p {
  color: hsla(0, 0%, 100%, 0.7);
  max-width: 300px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

.footer-section h4 {
  font-weight: 600;
  margin-bottom: var(--space-4);
  color: hsl(var(--text-inverse));
}

.footer-section a {
  display: block;
  color: hsla(0, 0%, 100%, 0.7);
  margin-bottom: var(--space-2);
  transition: color var(--transition-fast);
}

.footer-section a:hover {
  color: hsl(var(--accent));
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-8);
  border-top: 1px solid hsla(0, 0%, 100%, 0.1);
}

.footer-bottom p {
  color: hsla(0, 0%, 100%, 0.7);
  margin: 0;
}

.social-links {
  display: flex;
  gap: var(--space-4);
}

.social-links a {
  width: 40px;
  height: 40px;
  background: hsla(0, 0%, 100%, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: hsla(0, 0%, 100%, 0.7);
  transition: all var(--transition-fast);
}

.social-links a:hover {
  background: hsl(var(--accent));
  color: hsl(var(--text-inverse));
  transform: translateY(-2px);
}

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

.fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
  .api-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  
  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

@media (max-width: 768px) {
  :root {
    --font-size-5xl: 2.5rem;
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.5rem;
  }
  
  .nav-menu {
    position: fixed;
    top: 100%;
    left: 0;
    width: 100%;
    background: hsl(var(--surface));
    flex-direction: column;
    gap: 0;
    padding: var(--space-4);
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
  }
  
  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .nav-link {
    padding: var(--space-4) 0;
    border-bottom: 1px solid hsl(var(--border));
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .nav-toggle.active .bar:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  
  .nav-toggle.active .bar:nth-child(2) {
    opacity: 0;
  }
  
  .nav-toggle.active .bar:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .hero-stats {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  
  .pricing-card.featured {
    transform: none;
  }
  
  .pricing-card.featured:hover {
    transform: translateY(-5px);
  }
  
  .footer-links {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }
  
  .container {
    padding: 0 var(--space-3);
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: var(--font-size-4xl);
  }
  
  .hero-description {
    font-size: var(--font-size-lg);
  }
  
  .btn {
    width: 100%;
    max-width: 280px;
  }
  
  .code-block code {
    font-size: var(--font-size-xs);
  }
  
  .contact-img {
    height: 250px;
  }
}

/* ===== Custom Scrollbar ===== */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: hsl(var(--background));
}

::-webkit-scrollbar-thumb {
  background: hsl(var(--border-hover));
  border-radius: var(--radius-lg);
}

::-webkit-scrollbar-thumb:hover {
  background: hsl(var(--text-muted));
}

/* ===== Focus States for Accessibility ===== */
.btn:focus,
.nav-link:focus,
.copy-btn:focus {
  outline: 2px solid hsl(var(--primary));
  outline-offset: 2px;
}

/* ===== Print Styles ===== */
@media print {
  .nav,
  .hero-buttons,
  .footer {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .hero {
    min-height: auto;
    padding: var(--space-8) 0;
  }
  
  .section {
    page-break-inside: avoid;
  }
}