/* Base styles and variables */
:root {
  --primary-color: #5e50f9;
  --primary-dark: #4a3de6;
  --secondary-color: #14b8a6;
  --dark-color: #0f172a;
  --slate-color: #334155;
  --light-color: #f1f5f9;
  --gray-color: #64748b;
  --border-radius: 16px;
  --box-shadow: 0 8px 16px rgba(0, 0, 0, 0.05), 0 2px 4px rgba(0, 0, 0, 0.05);
  --box-shadow-hover: 0 12px 24px rgba(0, 0, 0, 0.08), 0 4px 8px rgba(0, 0, 0, 0.05);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  line-height: 1.7;
  color: var(--slate-color);
  background-color: var(--light-color);
  overflow-x: hidden;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header and Navigation */
header {
  background: var(--light-color);
  color: var(--dark-color);
  padding: 1rem 0;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: var(--transition);
  box-shadow: none;
}

header.scrolled {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo .logo-svg {
  height: 40px;
  width: auto;
  transition: transform var(--transition);
}

.logo .logo-svg:hover {
  transform: scale(1.05) rotate(-5deg);
}

.logo h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--dark-color);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 32px;
  margin: 0;
  padding: 0;
}

.nav-links li {
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--slate-color);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
  position: relative;
  padding: 4px 0;
  display: block;
}

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

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

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

/* Hero Section */
.hero {
  padding-top: 120px; /* Adjust for fixed header */
  background: linear-gradient(180deg, var(--light-color) 0%, #e0e7ff 100%);
}

.hero-content {
  text-align: center;
  padding: 6rem 0;
  max-width: 900px;
  margin: 0 auto;
}

.hero-content h1 {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  line-height: 1.2;
  color: var(--dark-color);
  background: linear-gradient(45deg, var(--primary-color), var(--dark-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-content p {
  font-size: 1.25rem;
  max-width: 750px;
  margin: 0 auto 2.5rem;
  color: var(--gray-color);
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 4rem;
}

.btn {
  display: inline-block;
  padding: 16px 36px;
  border-radius: var(--border-radius);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  font-size: 1rem;
  position: relative;
  overflow: hidden;
  z-index: 1;
  box-shadow: var(--box-shadow);
}

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

.btn.primary:hover {
  background-color: var(--primary-dark);
  transform: translateY(-4px);
  box-shadow: var(--box-shadow-hover);
}

.btn.secondary {
  background-color: white;
  color: var(--primary-color);
  border: 2px solid #e2e8f0;
}

.btn.secondary:hover {
  transform: translateY(-4px);
  box-shadow: var(--box-shadow-hover);
  border-color: var(--primary-color);
}

.screenshot {
  position: relative;
  max-width: 1000px;
  margin: 0 auto;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.screenshot img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--border-radius);
}

/* Section Styles */
section {
  padding: 6rem 0;
  position: relative;
  z-index: 1;
}

section:nth-of-type(odd) {
    background-color: #ffffff;
}

section h2 {
  text-align: center;
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 4rem;
  color: var(--dark-color);
  position: relative;
}

section h2::after {
  content: '';
  display: block;
  width: 70px;
  height: 4px;
  background: var(--primary-color);
  margin: 0.75rem auto;
  border-radius: 2px;
}

/* Features Section */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
}

.feature-card {
  background: white;
  border: 1px solid #e2e8f0;
  border-radius: var(--border-radius);
  padding: 2.5rem 2rem;
  box-shadow: none;
  transition: var(--transition);
  text-align: center;
  position: relative;
  overflow: hidden;
}

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

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
  line-height: 1;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.feature-card h3 {
  margin-bottom: 1rem;
  color: var(--dark-color);
  font-size: 1.4rem;
  font-weight: 600;
}

.feature-card p {
  color: var(--gray-color);
  font-size: 1rem;
  line-height: 1.7;
}

.feature-card a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
}

.feature-card a:hover {
  text-decoration: underline;
}

/* Shared card styles */
.card {
    background: white;
    border-radius: var(--border-radius);
    padding: 2.5rem;
    box-shadow: var(--box-shadow);
    border: 1px solid #e2e8f0;
}

/* Installation Section */
.installation-content {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 40px;
  align-items: flex-start;
}

.requirements h3, .installation-steps h3 {
  margin-bottom: 1.5rem;
  color: var(--dark-color);
  font-size: 1.5rem;
  font-weight: 600;
}

.requirements ul {
  list-style-type: none;
  padding-left: 0;
}

.requirements li {
  margin-bottom: 1rem;
  padding-left: 2rem;
  position: relative;
}

.requirements li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--secondary-color);
  font-weight: bold;
  font-size: 1.2rem;
}

.installation-steps h4 {
  margin: 2rem 0 1rem;
  color: var(--dark-color);
  font-weight: 600;
}

.installation-steps pre, .quick-start pre, .custom-model pre {
  background: #0f172a;
  color: #e2e8f0;
  padding: 1.5rem;
  border-radius: 12px;
  overflow-x: auto;
  font-family: 'Roboto Mono', monospace;
  font-size: 0.95rem;
  line-height: 1.6;
  margin: 1rem 0;
  border: 1px solid #1e293b;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.installation-steps ol {
  padding-left: 1.5rem;
  margin: 1rem 0;
}

.installation-steps li {
  margin-bottom: 1rem;
}

/* Authentication Section */
.auth-image {
  text-align: center;
  margin: 3rem 0;
}

.auth-image img {
  max-width: 100%;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  transition: var(--transition);
  border: 1px solid #e2e8f0;
}

.auth-image img:hover {
  transform: scale(1.02);
  box-shadow: var(--box-shadow-hover);
}

/* Use Cases Section */
.use-case-category {
  margin-bottom: 2.5rem;
  border: 1px solid #e2e8f0;
}

.use-case-category h3 {
  margin-bottom: 1.5rem;
  color: var(--dark-color);
  font-size: 1.5rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 12px;
}

.use-case-category pre {
  margin: 1rem 0;
}

/* Footer */
footer {
  background: var(--dark-color);
  color: #e2e8f0;
  text-align: center;
  padding: 4rem 0;
}

footer p {
  margin: 0.5rem 0;
  color: var(--gray-color);
}

footer a {
  color: var(--secondary-color);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
}

footer a:hover {
  text-decoration: underline;
  color: white;
}

/* Scroll to top button */
.scroll-to-top {
  position: fixed;
  bottom: 25px;
  right: 25px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--primary-color);
  color: white;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  display: none;
  justify-content: center;
  align-items: center;
  box-shadow: var(--box-shadow);
  transition: var(--transition);
  z-index: 1000;
  line-height: 1;
}

.scroll-to-top:hover {
  background: var(--primary-dark);
  transform: translateY(-4px) scale(1.05);
  box-shadow: var(--box-shadow-hover);
}

/* Mobile menu button */
.mobile-menu-button {
  display: none;
  background: none;
  border: none;
  color: var(--dark-color);
  font-size: 1.8rem;
  cursor: pointer;
  z-index: 1001;
}

/* Responsive Design */
@media (max-width: 768px) {
  .navbar {
    flex-wrap: wrap;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    width: 100%;
    background: white;
    position: absolute;
    top: 100%;
    left: 0;
    padding: 2rem 0;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    gap: 0;
  }

  .nav-links.active {
    display: flex;
  }
  
  .nav-links li {
    width: 100%;
    text-align: center;
  }

  .nav-links a {
    color: var(--dark-color);
    padding: 1rem 0;
    width: 100%;
  }
  
  .nav-links a:hover {
    background-color: var(--light-color);
  }

  .nav-links a::after {
    display: none;
  }

  .mobile-menu-button {
    display: flex;
  }
  
  .hero-content h1 {
    font-size: 2.5rem;
  }
  
  .hero-content p {
    font-size: 1.1rem;
  }
  
  .cta-buttons {
    flex-direction: column;
    align-items: center;
    gap: 15px;
  }
  
  .installation-content {
    grid-template-columns: 1fr;
  }
  
  section {
    padding: 4rem 0;
  }
  
  section h2 {
    font-size: 2rem;
  }
}

@media (max-width: 480px) {
  .container {
    width: 95%;
    padding: 0 15px;
  }
  
  .hero-content {
    padding: 4rem 0;
  }
  
  .card, .feature-card {
    padding: 2rem 1.5rem;
  }
}