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

:root {
  --color-primary: #6366f1;
  --color-primary-dark: #4f46e5;
  --color-secondary: #8b5cf6;
  --color-accent: #ec4899;
  --color-text: #0f172a;
  --color-text-light: #475569;
  --color-text-muted: #94a3b8;
  --color-bg: #ffffff;
  --color-bg-light: #f8fafc;
  --color-bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --color-bg-gradient-alt: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --color-border: #e2e8f0;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 3rem;
  --spacing-xl: 5rem;
  --spacing-2xl: 7rem;
  --max-width: 1280px;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
}

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

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  line-height: 1.7;
  background-color: var(--color-bg);
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  background: var(--color-bg-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--color-text);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--color-text);
  font-weight: 600;
}

p {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-light);
  font-size: 1.125rem;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: all 0.3s ease;
  font-weight: 500;
}

a:hover {
  color: var(--color-primary-dark);
  transform: translateY(-1px);
}

/* Layout */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

section {
  padding: var(--spacing-xl) 0;
}

/* Header and Navigation */
header {
  background-color: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-sm) 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
}

.logo {
  font-size: 1.75rem;
  font-weight: 800;
  background: var(--color-bg-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
  align-items: center;
}

.nav-links a {
  color: var(--color-text);
  font-weight: 500;
  font-size: 1rem;
  position: relative;
  padding: var(--spacing-xs) 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-bg-gradient);
  transition: width 0.3s ease;
}

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

.nav-links a:hover {
  color: var(--color-primary);
  transform: none;
}

/* Hero Section */
.hero {
  padding: var(--spacing-2xl) 0 var(--spacing-xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
  animation: pulse 15s ease-in-out infinite;
  pointer-events: none;
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
    opacity: 0.5;
  }
  50% {
    transform: scale(1.1);
    opacity: 0.8;
  }
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero h1 {
  margin-bottom: var(--spacing-md);
  animation: fadeInUp 0.8s ease-out;
}

.hero p {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  max-width: 700px;
  margin: 0 auto;
  color: var(--color-text-light);
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

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

/* Value Blocks / Feature Cards */
.value-blocks,
.use-cases,
.arch-components {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
  margin: var(--spacing-lg) 0;
}

.value-block,
.use-case,
.arch-component {
  padding: var(--spacing-lg);
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.value-block::before,
.use-case::before,
.arch-component::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--color-bg-gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.value-block:hover::before,
.use-case:hover::before,
.arch-component:hover::before {
  transform: scaleX(1);
}

.value-block:hover,
.use-case:hover,
.arch-component:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary);
}

.value-block h3,
.use-case h3,
.arch-component h3 {
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
  font-size: 1.5rem;
}

.value-block p,
.use-case p,
.arch-component p {
  color: var(--color-text-light);
  line-height: 1.7;
}

/* Architecture Components with special styling */
.arch-component {
  border-left: 4px solid var(--color-primary);
  padding-left: var(--spacing-lg);
}

.arch-component ul {
  margin-left: var(--spacing-md);
  margin-top: var(--spacing-sm);
  list-style: none;
}

.arch-component li {
  margin-bottom: var(--spacing-xs);
  color: var(--color-text-light);
  position: relative;
  padding-left: var(--spacing-md);
}

.arch-component li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 600;
}

/* How It Works / Info Sections */
.how-it-works {
  background: linear-gradient(135deg, #f8fafc 0%, #e0e7ff 100%);
  padding: var(--spacing-xl) 0;
  text-align: center;
  position: relative;
}

.how-it-works h2 {
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

.how-it-works p {
  max-width: 800px;
  margin: 0 auto;
  font-size: 1.25rem;
  line-height: 1.8;
}

/* Contact */
.contact-card {
  max-width: 600px;
  margin: var(--spacing-lg) auto;
  padding: var(--spacing-xl);
  background: var(--color-bg);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  text-align: center;
  transition: all 0.3s ease;
}

.contact-card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-4px);
}

.contact-card h3 {
  margin-bottom: var(--spacing-md);
  font-size: 2rem;
}

.contact-card p {
  margin-bottom: var(--spacing-sm);
  font-size: 1.125rem;
}

.contact-card a {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-primary);
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
  transition: all 0.3s ease;
}

.contact-card a:hover {
  background: var(--color-bg-gradient);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Footer */
footer {
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  color: var(--color-text-muted);
  padding: var(--spacing-lg) 0;
  margin-top: var(--spacing-2xl);
  text-align: center;
  font-size: 0.9375rem;
}

footer p {
  color: rgba(255, 255, 255, 0.7);
  margin: 0;
}

/* Responsive */
@media (max-width: 768px) {
  :root {
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
  }

  h1 {
    font-size: 2.5rem;
  }

  h2 {
    font-size: 2rem;
  }

  h3 {
    font-size: 1.5rem;
  }

  .hero {
    padding: var(--spacing-xl) 0;
  }

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

  .nav-links {
    flex-direction: row;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    justify-content: center;
  }

  nav {
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
  }

  .value-blocks,
  .use-cases,
  .arch-components {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
  }

  section {
    padding: var(--spacing-lg) 0;
  }

  .container {
    padding: 0 var(--spacing-sm);
  }

  .value-block,
  .use-case,
  .arch-component {
    padding: var(--spacing-md);
  }
}

@media (max-width: 480px) {
  .nav-links {
    font-size: 0.875rem;
    gap: var(--spacing-xs);
  }

  .logo {
    font-size: 1.5rem;
  }
}