/* VerJSON Landing Page Styles */

/* CSS Reset & Base */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* Brand Colors */
  --primary: hsl(221, 83%, 53%);
  --primary-dark: hsl(221, 83%, 45%);
  --primary-light: hsl(221, 83%, 96%);
  --secondary: hsl(215, 20%, 65%);
  --background: hsl(0, 0%, 100%);
  --background-alt: hsl(210, 20%, 98%);
  --foreground: hsl(222, 47%, 11%);
  --foreground-muted: hsl(215, 16%, 47%);
  --border: hsl(214, 32%, 91%);
  --success: hsl(142, 76%, 36%);
  
  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Container */
  --container-max: 1200px;
  --container-padding: 1.5rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  
  /* Shadows */
  --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);
}

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

body {
  font-family: var(--font-sans);
  color: var(--foreground);
  background: var(--background);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

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

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--background);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
}

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

.logo img {
  height: 36px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.nav-link {
  color: var(--foreground-muted);
  font-weight: 500;
  font-size: 0.9375rem;
  transition: color 0.2s;
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
}

.btn-secondary {
  background: var(--background);
  color: var(--foreground);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--background-alt);
  border-color: var(--secondary);
}

.btn-large {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1rem;
}

/* Sections */
.section {
  padding: var(--spacing-3xl) 0;
}

.section-alt {
  background: var(--background-alt);
}

.section h2 {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-md);
  color: var(--foreground);
}

.section-intro {
  text-align: center;
  color: var(--foreground-muted);
  font-size: 1.125rem;
  max-width: 700px;
  margin: 0 auto var(--spacing-2xl);
}

/* Hero Section */
.hero {
  padding: var(--spacing-3xl) var(--container-padding);
  text-align: center;
  background: linear-gradient(180deg, var(--primary-light) 0%, var(--background) 100%);
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--spacing-lg);
  color: var(--foreground);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--foreground-muted);
  margin-bottom: var(--spacing-xl);
  line-height: 1.6;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--spacing-md);
}

.hero-note {
  font-size: 0.875rem;
  color: var(--foreground-muted);
}

/* Problem Grid */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--spacing-lg);
}

.problem-card {
  background: var(--background);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: box-shadow 0.2s;
}

.problem-card:hover {
  box-shadow: var(--shadow-md);
}

.problem-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
}

.problem-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.problem-card p {
  color: var(--foreground-muted);
  font-size: 0.9375rem;
}

/* Solution Grid */
.solution-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-xl);
}

.solution-card {
  background: var(--background);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}

.solution-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary);
  color: white;
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-lg);
}

.solution-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.solution-card p {
  color: var(--foreground-muted);
  line-height: 1.7;
}

/* Features List */
.features-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-md);
}

.feature-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--background-alt);
  border-radius: var(--radius-md);
}

.feature-item svg {
  color: var(--success);
  flex-shrink: 0;
}

.feature-item span {
  font-size: 0.9375rem;
}

/* Audience Grid */
.audience-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--spacing-lg);
}

.audience-card {
  background: var(--background);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  text-align: center;
}

.audience-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--primary);
}

.audience-card p {
  color: var(--foreground-muted);
  font-size: 0.9375rem;
}

/* FAQ Section */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--border);
  padding: var(--spacing-lg) 0;
}

.faq-item summary {
  font-size: 1.0625rem;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--foreground-muted);
  transition: transform 0.2s;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item p {
  margin-top: var(--spacing-md);
  color: var(--foreground-muted);
  line-height: 1.7;
}

/* CTA Section */
.cta-section {
  background: var(--primary);
  color: white;
}

.cta-container {
  text-align: center;
}

.cta-section h2 {
  color: white;
  font-size: 1.75rem;
}

.cta-section p {
  opacity: 0.9;
  margin-bottom: var(--spacing-xl);
  font-size: 1.125rem;
}

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

.cta-section .btn-primary:hover {
  background: var(--primary-light);
}

/* Footer */
.footer {
  background: var(--foreground);
  color: white;
  padding: var(--spacing-2xl) var(--container-padding);
}

.footer-container {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-2xl);
}

.footer-brand img {
  height: 32px;
  width: auto;
  margin-bottom: var(--spacing-sm);
  filter: brightness(0) invert(1);
}

.footer-brand p {
  color: var(--secondary);
  font-size: 0.875rem;
}

.footer-links {
  display: flex;
  gap: var(--spacing-3xl);
}

.footer-column h4 {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-md);
  color: var(--secondary);
}

.footer-column a {
  display: block;
  color: white;
  font-size: 0.9375rem;
  padding: var(--spacing-xs) 0;
  transition: opacity 0.2s;
}

.footer-column a:hover {
  opacity: 0.8;
}

.footer-bottom {
  max-width: var(--container-max);
  margin: var(--spacing-xl) auto 0;
  padding-top: var(--spacing-xl);
  border-top: 1px solid hsl(215, 20%, 25%);
  text-align: center;
}

.footer-bottom p {
  color: var(--secondary);
  font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 1.875rem;
  }
  
  .hero-subtitle {
    font-size: 1.0625rem;
  }
  
  .section h2 {
    font-size: 1.5rem;
  }
  
  .section-intro {
    font-size: 1rem;
  }
  
  .nav-links {
    gap: var(--spacing-md);
  }
  
  .nav-link {
    display: none;
  }
  
  .footer-container {
    flex-direction: column;
    text-align: center;
  }
  
  .footer-links {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .hero-cta {
    flex-direction: column;
    align-items: stretch;
  }
  
  .btn-large {
    width: 100%;
  }
  
  .solution-grid,
  .problem-grid {
    grid-template-columns: 1fr;
  }
}

/* Print Styles */
@media print {
  .header,
  .hero-cta,
  .cta-section,
  .footer {
    display: none;
  }
  
  .section {
    padding: 1rem 0;
  }
}