/* Modern CSS Reset */
*, *::before, *::after {
  box-sizing: border-box;
}

body, h1, h2, h3, h4, p, figure, blockquote, dl, dd {
  margin: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  text-rendering: optimizeSpeed;
  line-height: 1.6;
  font-family: 'Poppins', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: #333;
  background-color: #f9fbfd;
}

/* Variables */
:root {
  --primary-color: #1e88e5;
  --primary-light: #64b5f6;
  --primary-dark: #0d47a1;
  --accent-color: #00c853;
  --accent-light: #69f0ae;
  --text-light: #f9fbfd;
  --text-dark: #263238;
  --bg-light: #f9fbfd;
  --bg-medium: #e3f2fd;
  --bg-dark: #263238;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 3.5rem;
  --spacing-xl: 6rem;
  --border-radius: 12px;
  --container-width: 1200px;
  --shadow-small: 0 3px 6px rgba(0, 0, 0, 0.08);
  --shadow-medium: 0 6px 12px rgba(0, 0, 0, 0.12);
  --shadow-large: 0 12px 28px rgba(0, 0, 0, 0.15);
  --transition-fast: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* Layout */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Header */
header {
  background-color: white;
  color: var(--text-dark);
  padding: var(--spacing-sm) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-small);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.logo-icon {
  width: 2.5rem;
  height: 2.5rem;
  color: var(--primary-color);
}

.logo h1 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--primary-dark);
}

nav ul {
  display: flex;
  gap: var(--spacing-md);
  list-style: none;
  padding: 0;
  margin: 0;
}

nav a {
  color: var(--text-dark);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

nav a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -4px;
  left: 0;
  background-color: var(--primary-color);
  transition: width var(--transition-fast);
}

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

nav a:hover::after {
  width: 100%;
}

/* Hero Section */
.hero {
  background: linear-gradient(120deg, #e3f2fd, #bbdefb);
  color: var(--text-dark);
  padding: var(--spacing-xl) 0;
  position: relative;
  overflow: hidden;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  align-items: center;
}

.hero-content {
  z-index: 2;
}

.hero h2 {
  font-size: 3.2rem;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  max-width: 600px;
  color: var(--primary-dark);
}

.hero p {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-md);
  max-width: 500px;
}

.ai-illustration {
  width: 100%;
  height: auto;
  filter: drop-shadow(0 8px 16px rgba(0, 0, 0, 0.15));
  transform: scale(1.1);
}

/* Features Section */
.features {
  padding: var(--spacing-xl) 0;
  background-color: white;
}

.features h2 {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: var(--spacing-lg);
  color: var(--primary-dark);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
}

.feature-card {
  background-color: var(--bg-light);
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-small);
  text-align: center;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  border: 1px solid rgba(100, 181, 246, 0.2);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-medium);
}

.feature-icon {
  width: 70px;
  height: 70px;
  margin: 0 auto var(--spacing-sm);
  color: var(--primary-color);
  padding: 15px;
  background-color: var(--bg-medium);
  border-radius: 50%;
}

.feature-card h3 {
  margin-bottom: var(--spacing-xs);
  color: var(--primary-dark);
}

/* How It Works Section */
.how-it-works {
  padding: var(--spacing-xl) 0;
  background-color: var(--bg-medium);
  position: relative;
}

.how-it-works::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4rem;
  background-color: white;
  clip-path: ellipse(75% 100% at 50% 0%);
}

.how-it-works::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 4rem;
  background-color: var(--primary-color);
  clip-path: ellipse(75% 100% at 50% 100%);
}

.how-it-works h2 {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: var(--spacing-lg);
  color: var(--primary-dark);
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
  counter-reset: step;
  position: relative;
  z-index: 1;
}

.step {
  text-align: center;
  padding: var(--spacing-md);
  position: relative;
  background-color: white;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-small);
}

.step-number {
  display: grid;
  place-items: center;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: var(--primary-color);
  color: white;
  font-size: 1.5rem;
  font-weight: bold;
  margin: 0 auto var(--spacing-sm);
}

.step h3 {
  margin-bottom: var(--spacing-xs);
  color: var(--primary-dark);
}

/* Call to Action Section */
.call-to-action {
  padding: var(--spacing-xl) 0;
  background-color: var(--primary-color);
  color: var(--text-light);
  text-align: center;
  position: relative;
}

.call-to-action h2 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-sm);
}

.call-to-action p {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-md);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  opacity: 0.9;
}

.cta-button {
  display: inline-block;
  background-color: var(--accent-color);
  color: white;
  font-size: 1.2rem;
  font-weight: 600;
  padding: 0.8em 2em;
  border-radius: 50px;
  text-decoration: none;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: var(--shadow-medium);
}

.cta-button:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-large);
  background-color: var(--accent-light);
}

/* Footer */
footer {
  background-color: var(--bg-dark);
  color: var(--text-light);
  padding: var(--spacing-lg) 0;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
}

.footer-logo {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--spacing-xs);
}

.logo-icon-small {
  width: 2rem;
  height: 2rem;
  color: var(--primary-light);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.footer-links a {
  color: var(--text-light);
  text-decoration: none;
  opacity: 0.8;
  transition: opacity var(--transition-fast);
}

.footer-links a:hover {
  opacity: 1;
}

.copyright {
  opacity: 0.7;
  font-size: 0.9rem;
  text-align: center;
  margin-top: var(--spacing-md);
  grid-column: 1 / -1;
}

/* Responsive Adjustments */
@media (max-width: 900px) {
  :root {
    --spacing-xl: 5rem;
    --spacing-lg: 2.5rem;
  }
  
  .hero .container {
    grid-template-columns: 1fr;
  }
  
  .hero h2 {
    font-size: 2.5rem;
  }
  
  .ai-illustration {
    max-width: 70%;
    margin: 0 auto;
  }
}

@media (max-width: 600px) {
  :root {
    --spacing-xl: 3.5rem;
    --spacing-lg: 2rem;
    --spacing-md: 1.25rem;
  }
  
  header .container {
    flex-direction: column;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
  }
  
  nav ul {
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .hero h2 {
    font-size: 2rem;
  }
  
  .hero p {
    font-size: 1.1rem;
  }
  
  .cta-button {
    font-size: 1.1rem;
    padding: 0.7em 1.8em;
  }
  
  .feature-grid,
  .steps,
  .footer-content {
    grid-template-columns: 1fr;
  }
}