/* Modern Global CSS - Shared across all pages */

/* CSS Variables */
:root {
  /* Colors - Enhanced palette with subtle accents */
  --color-primary: #0969da;
  --color-primary-hover: #0860ca;
  --color-primary-light: #e0f2fe;
  --color-secondary: #1f2328;
  --color-accent-purple: #7c3aed;
  --color-accent-teal: #14b8a6;
  --color-accent-pink: #ec4899;
  --color-accent-orange: #f97316;
  --color-accent-indigo: #6366f1;
  --color-text-primary: #1f2328;
  --color-text-secondary: #656d76;
  --color-text-muted: #8c959f;
  --color-bg-primary: #ffffff;
  --color-bg-secondary: #f6f8fa;
  --color-bg-tertiary: #f3f4f6;
  --color-bg-gradient: linear-gradient(to bottom, #ffffff 0%, #f8faff 100%);
  --color-border: #d1d9e0;
  --color-border-light: #e5e7eb;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-text: linear-gradient(90deg, #0969da 0%, #764ba2 100%);
  --gradient-accent: linear-gradient(135deg, #667eea 0%, #14b8a6 50%, #0969da 100%);
  
  /* Typography - System fonts */
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;
  
  /* Font sizes */
  --text-xs: 12px;
  --text-sm: 14px;
  --text-base: 16px;
  --text-lg: 18px;
  --text-xl: 20px;
  --text-2xl: 24px;
  --text-3xl: 32px;
  --text-4xl: 40px;
  --text-5xl: 48px;
  --text-6xl: 64px;
  
  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;
  
  /* Border radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1), 0 5px 10px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.15);
  
  /* Z-index scale */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-popover: 600;
  --z-tooltip: 700;
}

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

/* Base styles */
html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-stack);
  font-size: var(--text-base);
  line-height: 1.5;
  color: var(--color-text-primary);
  background: var(--color-bg-gradient);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Main content wrapper */
main {
  flex: 1;
}

/* Container */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

p {
  line-height: 1.6;
  color: var(--color-text-secondary);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

/* Navigation Styles */
.navbar-modern {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border-light);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  z-index: var(--z-fixed);
  height: 64px;
  display: flex;
  align-items: center;
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.logo img {
  height: 32px;
  width: auto;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--space-8);
  margin: 0 auto;
}

.nav-link {
  color: var(--color-text-primary);
  font-size: var(--text-base);
  font-weight: 500;
  padding: var(--space-2) 0;
  position: relative;
  transition: color 0.2s ease;
}

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

/* Dropdown menu */
.nav-dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: white;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2);
  min-width: 200px;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s ease;
  margin-top: var(--space-2);
  list-style: none;
}

.nav-dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
}

.dropdown-menu li {
  margin: 0;
}

.dropdown-menu a {
  display: block;
  padding: var(--space-2) var(--space-3);
  color: var(--color-text-primary);
  font-size: var(--text-sm);
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.dropdown-menu a:hover {
  background: var(--color-bg-secondary);
  color: var(--color-primary);
}

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

.nav-link-cta {
  color: var(--color-text-primary);
  font-weight: 500;
  padding: var(--space-2) var(--space-4);
}

.btn-primary-nav {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent-purple) 100%);
  color: white;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  font-weight: 500;
  transition: all 0.2s ease;
  border: 1px solid var(--color-primary);
}

.btn-primary-nav:hover {
  background: linear-gradient(135deg, var(--color-primary-hover) 0%, var(--color-accent-purple) 100%);
  color: white;
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

/* Mobile menu */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}

.mobile-menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  margin: 5px 0;
  transition: all 0.3s ease;
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  bottom: 0;
  background: white;
  z-index: var(--z-fixed);
  overflow-y: auto;
}

/* Footer Styles */
.footer-modern {
  background: var(--color-bg-primary);
  border-top: 1px solid var(--color-border-light);
  padding: var(--space-16) 0 var(--space-8);
  margin-top: auto;
}

.footer-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-12);
  margin-bottom: var(--space-16);
}

.footer-column h4 {
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-4);
  color: var(--color-text-primary);
}

.footer-column ul {
  list-style: none;
}

.footer-column li {
  margin-bottom: var(--space-3);
}

.footer-column a {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  transition: color 0.2s ease;
}

.footer-column a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border-light);
}

.footer-bottom p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.footer-links {
  display: flex;
  gap: var(--space-6);
}

.footer-links a {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

/* Utility Classes */
.gradient-text {
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-accent-purple) 50%, var(--color-accent-teal) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-intro {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section-intro h2 {
  margin-bottom: var(--space-4);
  color: var(--color-text-primary);
}

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

/* Button Styles */
.btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent-purple) 100%);
  color: white;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  font-weight: 500;
  font-size: var(--text-lg);
  transition: all 0.2s ease;
  display: inline-block;
  border: 2px solid transparent;
  position: relative;
  overflow: hidden;
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--color-primary-hover) 0%, var(--color-accent-purple) 100%);
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(9, 105, 218, 0.2);
  color: white;
}

.btn-secondary {
  background: linear-gradient(135deg, rgba(9, 105, 218, 0.08) 0%, rgba(124, 58, 237, 0.05) 100%);
  color: var(--color-primary);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  font-weight: 500;
  font-size: var(--text-lg);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  transition: all 0.3s ease;
  border: 2px solid rgba(9, 105, 218, 0.3);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 4px 12px rgba(9, 105, 218, 0.15);
  position: relative;
  overflow: hidden;
}

.btn-secondary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transition: left 0.5s ease;
}

.btn-secondary:hover::before {
  left: 100%;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 1);
  color: var(--color-primary);
  transform: translateY(-2px);
  border-color: var(--color-primary);
  box-shadow: 0 8px 25px rgba(9, 105, 218, 0.25);
}

.btn-secondary i {
  font-size: var(--text-xl);
  transition: transform 0.3s ease;
}

.btn-secondary:hover i {
  transform: scale(1.1);
}

/* Responsive Design */
@media (max-width: 1024px) {
  .nav-menu {
    gap: var(--space-6);
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  /* Hide desktop nav items */
  .nav-menu,
  .nav-actions {
    display: none;
  }
  
  /* Show mobile menu toggle */
  .mobile-menu-toggle {
    display: block;
  }
  
  /* Mobile menu styles */
  body.menu-open {
    overflow: hidden;
  }
  
  body.menu-open .mobile-menu {
    display: block;
  }
  
  body.menu-open .mobile-menu-toggle span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  
  body.menu-open .mobile-menu-toggle span:nth-child(2) {
    opacity: 0;
  }
  
  body.menu-open .mobile-menu-toggle span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }
  
  .mobile-nav-menu {
    list-style: none;
    padding: var(--space-6);
  }
  
  .mobile-nav-link {
    display: block;
    padding: var(--space-3) 0;
    color: var(--color-text-primary);
    font-size: var(--text-lg);
    font-weight: 500;
    border-bottom: 1px solid var(--color-border-light);
  }
  
  .mobile-dropdown-menu {
    list-style: none;
    padding-left: var(--space-6);
    display: none;
  }
  
  .mobile-nav-dropdown.active .mobile-dropdown-menu {
    display: block;
  }
  
  .mobile-dropdown-menu a {
    display: block;
    padding: var(--space-2) 0;
    color: var(--color-text-secondary);
    font-size: var(--text-base);
  }
  
  .mobile-nav-actions {
    padding: var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
  }
  
  .mobile-nav-cta,
  .btn-primary-nav-mobile {
    display: block;
    text-align: center;
    width: 100%;
  }
  
  .btn-primary-nav-mobile {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent-purple) 100%);
    color: white;
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-sm);
    font-weight: 500;
  }
  
  /* Footer responsive */
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }
}

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

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Page padding to account for fixed nav */
body {
  padding-top: 64px;
}