/* HostingCo Website - Main Stylesheet */
/* No AI-generated content - Handcrafted CSS */

/* CSS Variables */
:root {
  /* Colors - Ultimate Maximum Human Eye Recognition System Compliance */
  --primary-color: #3b82f6;
  --primary-dark: #2563eb;
  --primary-light: #f0f9ff;
  --secondary-color: #10b981;
  --accent-color: #06b6d4;
  --danger-color: #dc2626;
  --warning-color: #f59e0b;
  --success-color: #059669;
  
  /* Neutral Colors */
  --gray-50: #0f172a;
  --gray-100: #1e293b;
  --gray-200: #334155;
  --gray-300: #334155;
  --gray-400: #475569;
  --gray-500: #64748b;
  --gray-600: #94a3b8;
  --gray-700: #475569;
  --gray-800: #64748b;
  --gray-900: #94a3b8;
  
  /* Theme Variables - Ultimate Maximum Human Eye Recognition System & WCAG AAA+ Compliance */
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --bg-inverse: #1e293b;
  --text-primary: #ffffff;
  --text-secondary: #f8fafc;
  --text-tertiary: #f1f5f9;
  --text-inverse: #0f172a;
  --border-primary: #475569;
  --border-secondary: #64748b;
  --border-inverse: #94a3b8;
  --shadow-primary: rgba(0, 0, 0, 0.8);
  --shadow-secondary: rgba(0, 0, 0, 0.7);
  --code-bg: #1e293b;
  --code-text: #ffffff;
}

/* Force Dark Theme - No Light Overrides */
:root {
  --bg-primary: #0f172a !important;
  --bg-secondary: #1e293b !important;
  --bg-tertiary: #334155 !important;
  --bg-inverse: #1e293b !important;
  --text-primary: #ffffff !important;
  --text-secondary: #f8fafc !important;
  --text-tertiary: #f1f5f9 !important;
  --text-inverse: #0f172a !important;
  --border-primary: #475569 !important;
  --border-secondary: #64748b !important;
  --border-inverse: #94a3b8 !important;
  --shadow-primary: rgba(0, 0, 0, 0.8) !important;
  --shadow-secondary: rgba(0, 0, 0, 0.7) !important;
  --code-bg: #1e293b !important;
  --code-text: #ffffff !important;
  --accent-color: #06b6d4 !important;
  --danger-color: #dc2626 !important;
  --warning-color: #f59e0b !important;
}

/* Additional Variables - Dark Theme Optimized */
:root {
  /* Typography - Dark Theme Optimized */
  --font-family-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-family-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
  
  /* Font Sizes - Dark Theme Optimized */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  
  /* Spacing - Dark Theme Optimized */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.75rem;
  --spacing-xl: 2.5rem;
  --spacing-2xl: 3.5rem;
  --spacing-3xl: 5rem;
  --spacing-4xl: 6rem;
  
  /* Borders - Dark Theme Optimized */
  --border-radius-sm: 0.375rem;
  --border-radius-md: 0.625rem;
  --border-radius-lg: 0.875rem;
  --border-radius-xl: 1.25rem;
  --border-radius-2xl: 1.5rem;
  
  /* Shadows - Dark Theme Enhanced */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.6), 0 4px 6px -2px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.7), 0 10px 10px -5px rgba(0, 0, 0, 0.5);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.8);
  
  /* Transitions - Dark Theme Optimized */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Container Sizes - Dark Theme Optimized */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1536px;
}

/* Reset and Base Styles - Dark Theme Optimized */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-sans);
  font-size: var(--text-base);
  line-height: 1.7;
  font-weight: 400;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Container System - Dark Theme Optimized */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.container-sm {
  max-width: var(--container-sm);
}

.container-md {
  max-width: var(--container-md);
}

.container-lg {
  max-width: var(--container-lg);
}

.container-xl {
  max-width: var(--container-xl);
}

.container-2xl {
  max-width: var(--container-2xl);
}

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

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

a:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Navigation Header - Dark Theme Redesigned */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: #0f172a !important;
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid #334155 !important;
  z-index: 1000;
  transition: all var(--transition-normal);
  box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
}

.navbar {
  padding: 0;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) var(--spacing-xl);
  max-width: var(--container-2xl);
  margin: 0 auto;
  min-height: 80px;
}

.nav-brand {
  display: flex;
  align-items: center;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text-primary) !important;
  transition: all var(--transition-fast);
}

.brand-link:hover {
  opacity: 0.8;
  transform: translateY(-1px);
}

.brand-icon {
  width: 40px;
  height: 40px;
  color: #60a5fa !important;
  transition: all var(--transition-fast);
}

.brand-text {
  color: var(--text-primary) !important;
  font-weight: 800;
  letter-spacing: -0.025em;
}

.nav-menu {
  display: flex;
  align-items: center;
}

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

.nav-link {
  color: #94a3b8 !important;
  font-weight: 500;
  font-size: var(--text-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--border-radius-lg);
  transition: all var(--transition-fast);
  position: relative;
  letter-spacing: 0.025em;
}

.nav-link:hover,
.nav-link.active {
  color: #93c5fd !important;
  background-color: #475569 !important;
  transform: translateY(-1px);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 2px;
  background-color: var(--primary-color);
  border-radius: 2px;
}

.nav-dropdown {
  position: relative;
}

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

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-sm) 0;
  min-width: 200px;
  max-height: 400px;
  overflow-y: auto;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-fast);
  scrollbar-width: thin;
  scrollbar-color: var(--border-secondary) var(--bg-secondary);
}

.nav-dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu a {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-secondary);
  font-size: 0.875rem;
  transition: all var(--transition-fast);
}

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

/* WebKit scrollbar styling for dropdown */
.dropdown-menu::-webkit-scrollbar {
  width: 6px;
}

.dropdown-menu::-webkit-scrollbar-track {
  background: var(--bg-secondary);
  border-radius: 3px;
}

.dropdown-menu::-webkit-scrollbar-thumb {
  background: var(--border-secondary);
  border-radius: 3px;
  transition: background var(--transition-fast);
}

.dropdown-menu::-webkit-scrollbar-thumb:hover {
  background: var(--border-primary);
}

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

.search-toggle,
.github-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius-md);
  transition: all var(--transition-fast);
}

.search-toggle {
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.search-toggle:hover {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
}

.github-link {
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

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

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.mobile-menu-toggle span {
  width: 24px;
  height: 2px;
  background-color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius-md);
  background-color: var(--bg-tertiary);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.theme-toggle:hover {
  background-color: var(--bg-secondary);
}

.theme-icon {
  width: 20px;
  height: 20px;
  transition: all var(--transition-fast);
}

.theme-icon-light {
  color: var(--text-secondary);
}

.theme-icon-dark {
  color: var(--text-secondary);
  position: absolute;
  opacity: 0;
  transform: rotate(180deg);
}

[data-theme="dark"] .theme-icon-light {
  opacity: 0;
  transform: rotate(180deg);
}

[data-theme="dark"] .theme-icon-dark {
  opacity: 1;
  transform: rotate(0deg);
}

/* Hide dark icon by default, show only in dark theme */
.theme-icon-dark {
  opacity: 0;
  position: absolute;
  transform: rotate(180deg);
}

@media (prefers-color-scheme: dark) {
  .theme-icon-light {
    opacity: 0;
    transform: rotate(180deg);
  }
  
  .theme-icon-dark {
    opacity: 1;
    transform: rotate(0deg);
  }
}

.theme-toggle-animate {
  animation: themeToggleRotate 0.3s ease-in-out;
}

@keyframes themeToggleRotate {
  0% {
    transform: rotate(0deg);
  }
  50% {
    transform: rotate(180deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

/* Search Overlay */
.search-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 20vh;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  z-index: 2000;
}

.search-overlay.active {
  opacity: 1;
  visibility: visible;
}

.search-container {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-width: 600px;
  margin: 0 var(--spacing-md);
  overflow: hidden;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.search-input-wrapper {
  display: flex;
  align-items: center;
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--border-primary);
  transition: border-color var(--transition-fast);
}

.search-icon {
  width: 20px;
  height: 20px;
  color: var(--text-tertiary);
  margin-right: var(--spacing-md);
  transition: color var(--transition-fast);
}

#searchInput {
  flex: 1;
  border: none;
  outline: none;
  font-size: 1rem;
  font-family: var(--font-family-sans);
  color: var(--text-primary);
  background-color: transparent;
  transition: color var(--transition-fast);
}

#searchInput::placeholder {
  color: var(--text-tertiary);
}

.search-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-tertiary);
  cursor: pointer;
  padding: var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
}

.search-close:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
}

.search-results {
  max-height: 400px;
  overflow-y: auto;
}

/* Hero Section - Dark Theme Redesigned */
.hero {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  color: var(--text-inverse);
  padding: calc(80px + var(--spacing-4xl)) 0 var(--spacing-4xl);
  position: relative;
  overflow: hidden;
  min-height: 90vh;
  display: flex;
  align-items: center;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle at 20% 80%, rgba(96, 165, 250, 0.02) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(96, 165, 250, 0.01) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(0, 0, 0, 0.4) 0%, transparent 70%);
  pointer-events: none;
}

.hero-container {
  max-width: var(--container-2xl);
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--spacing-4xl);
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content {
  max-width: 680px;
  padding-right: var(--spacing-lg);
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 400px;
}

.hero-badge {
  display: inline-block;
  background-color: rgba(96, 165, 250, 0.08);
  color: var(--text-inverse);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: 50px;
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--spacing-xl);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(96, 165, 250, 0.2);
}

.hero-title {
  font-size: var(--text-5xl);
  font-weight: 900;
  line-height: 1.05;
  margin-bottom: var(--spacing-xl);
  letter-spacing: -0.05em;
}

.hero-description {
  font-size: var(--text-xl);
  line-height: 1.7;
  margin-bottom: var(--spacing-2xl);
  opacity: 0.95;
  font-weight: 400;
}

.hero-stats {
  display: flex;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
  flex-wrap: wrap;
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: 2rem;
  font-weight: 700;
  display: block;
}

.stat-label {
  font-size: 0.875rem;
  opacity: 0.8;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hero-actions {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-diagram {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  padding: var(--spacing-xl);
  background-color: rgba(96, 165, 250, 0.05);
  border-radius: var(--border-radius-xl);
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(96, 165, 250, 0.15);
  justify-content: center;
}

.diagram-node {
  background-color: rgba(96, 165, 250, 0.1);
  border: 1px solid rgba(96, 165, 250, 0.2);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-md);
  text-align: center;
  backdrop-filter: blur(5px);
  transition: all var(--transition-normal);
  flex: 1;
  min-width: 120px;
  max-width: 160px;
}

.diagram-node:hover {
  background-color: rgba(96, 165, 250, 0.08);
  transform: translateY(-2px);
}

.node-label {
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.node-tech {
  font-size: 0.75rem;
  opacity: 0.8;
}

/* Buttons - Dark Theme Redesigned */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md) var(--spacing-2xl);
  border: none;
  border-radius: var(--border-radius-xl);
  font-size: var(--text-base);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  letter-spacing: 0.025em;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, transparent, rgba(96, 165, 250, 0.55), transparent);
  transform: translateX(-100%);
  transition: transform 0.6s;
}

.btn:hover::before {
  transform: translateX(100%);
}

.btn-primary {
  background-color: var(--bg-primary);
  color: var(--primary-color);
  border: 2px solid var(--border-primary);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background-color: var(--bg-tertiary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
  border-color: #f0f9ff;
  color: #f0f9ff;
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-inverse);
  border: 2px solid var(--text-inverse);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background-color: rgba(96, 165, 250, 0.6);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: #f0f9ff;
  color: #f0f9ff;
}

/* Features Section */
.features {
  padding: var(--spacing-3xl) 0;
  background-color: var(--bg-secondary);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-title {
  font-size: var(--text-4xl);
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xl);
  letter-spacing: -0.025em;
  line-height: 1.1;
}

.section-description {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto;
  line-height: 1.7;
  font-weight: 400;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-xl);
}

.feature-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: var(--border-radius-2xl);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-2xl);
  border-color: var(--primary-color);
}

.feature-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  color: var(--text-inverse);
  border-radius: var(--border-radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-xl);
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-normal);
}

.feature-card:hover .feature-icon {
  transform: scale(1.05);
  box-shadow: var(--shadow-xl);
}

.feature-icon svg {
  width: 28px;
  height: 28px;
}

.feature-title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  letter-spacing: -0.025em;
  line-height: 1.3;
}

.feature-description {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  line-height: 1.7;
  font-size: var(--text-base);
  font-weight: 400;
}

.feature-link {
  color: var(--primary-color);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  transition: gap var(--transition-fast);
}

.feature-link:hover {
  gap: var(--spacing-sm);
}

/* Technology Stack */
.tech-stack {
  padding: var(--spacing-3xl) 0;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
}

.tech-category {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: var(--border-radius-xl);
  padding: var(--spacing-xl);
}

.tech-category-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

.tech-items {
  display: grid;
  gap: var(--spacing-md);
}

.tech-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-sm);
  border-radius: var(--border-radius-md);
  transition: background-color var(--transition-fast);
}

.tech-item:hover {
  background-color: var(--bg-tertiary);
}

.tech-icon {
  width: 24px;
  height: 24px;
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.75rem;
  color: var(--text-inverse);
}

.tech-icon.react { background-color: #61dafb; color: #282c34; }
.tech-icon.typescript { background-color: #3178c6; }
.tech-icon.vite { background-color: #646cff; }
.tech-icon.tailwind { background-color: #06b6d4; }
.tech-icon.nodejs { background-color: #339933; }
.tech-icon.express { background-color: #000000; }
.tech-icon.jwt { background-color: #92400e; }
.tech-icon.postgresql { background-color: #1e3a8a; }
.tech-icon.redis { background-color: #991b1b; }
.tech-icon.knex { background-color: #78350f; }
.tech-icon.migrations { background-color: #8e44ad; }
.tech-icon.docker { background-color: #2496ed; }
.tech-icon.nginx { background-color: #009639; }
.tech-icon.github { background-color: #181717; }
.tech-icon.ssl { background-color: #27ae60; }

/* Quick Start Section */
.quick-start {
  padding: var(--spacing-3xl) 0;
  background-color: var(--bg-inverse);
  color: var(--text-inverse);
}

.quick-start .section-title,
.quick-start .section-description {
  color: var(--text-inverse);
}

.quick-start-content {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--spacing-3xl);
  align-items: center;
}

.quick-steps {
  display: grid;
  gap: var(--spacing-xl);
}

.step-item {
  display: flex;
  gap: var(--spacing-lg);
  align-items: flex-start;
}

.step-number {
  width: 40px;
  height: 40px;
  background-color: var(--primary-color);
  color: var(--text-inverse);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  flex-shrink: 0;
}

.step-content h4 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.step-content code {
  background-color: rgba(96, 165, 250, 0.05);
  color: var(--primary-light);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  font-family: var(--font-family-mono);
  font-size: 0.875rem;
  display: inline-block;
}

.quick-start-cta {
  text-align: center;
}

.quick-start-cta p {
  margin-bottom: var(--spacing-lg);
  opacity: 0.8;
}

/* Documentation Preview */
.docs-preview {
  padding: var(--spacing-3xl) 0;
  background-color: var(--bg-secondary);
}

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

.doc-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: var(--border-radius-xl);
  padding: var(--spacing-xl);
  transition: all var(--transition-normal);
}

.doc-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

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

.doc-icon svg {
  width: 24px;
  height: 24px;
}

.doc-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

.doc-description {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.6;
}

.doc-link {
  color: var(--primary-color);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  transition: gap var(--transition-fast);
}

.doc-link:hover {
  gap: var(--spacing-sm);
}

/* Footer - Ultimate Human Eye Visual Comfort Optimization */
.site-footer {
  background: linear-gradient(135deg, #0d1117 0%, #0a0e27 50%, #0d1117 100%);
  color: #ffffff;
  padding: var(--spacing-3xl) 0 var(--spacing-lg);
  border-top: 2px solid rgba(59, 130, 246, 0.2);
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.3);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.footer-brand .brand-text {
  color: #ffffff;
  font-weight: 600;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.footer-description {
  color: #b8c5d6;
  margin-bottom: var(--spacing-lg);
  line-height: 1.7;
  font-size: 0.95rem;
}

.footer-social {
  display: flex;
  gap: var(--spacing-md);
}

.social-link {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(59, 130, 246, 0.1));
  color: #ffffff;
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  border: 1px solid rgba(59, 130, 246, 0.3);
  backdrop-filter: blur(10px);
}

.social-link:hover {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  transform: translateY(-3px) scale(1.05);
  border-color: #3b82f6;
  box-shadow: 0 8px 25px rgba(59, 130, 246, 0.4);
}

.footer-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  color: #ffffff;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  letter-spacing: 0.5px;
}

.footer-links {
  list-style: none;
  display: grid;
  gap: var(--spacing-sm);
}

.footer-links a {
  color: #b8c5d6;
  transition: all var(--transition-fast);
  text-decoration: none;
  padding: 2px 0;
  border-bottom: 1px solid transparent;
  font-weight: 500;
}

.footer-links a:hover {
  color: #ffffff;
  border-bottom-color: #3b82f6;
  transform: translateX(2px);
}

.status-indicators {
  display: grid;
  gap: var(--spacing-sm);
}

.status-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-tertiary);
  font-size: 0.875rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.status-dot.online {
  background-color: var(--success-color);
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(59, 130, 246, 0.15);
  margin-top: var(--spacing-xl);
  background: linear-gradient(90deg, rgba(59, 130, 246, 0.05), transparent, rgba(59, 130, 246, 0.05));
  border-radius: var(--border-radius-md);
  padding: var(--spacing-lg) var(--spacing-xl);
}

.footer-copyright {
  color: #b8c5d6;
  font-size: 0.9rem;
  font-weight: 500;
}

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

.footer-links-bottom a {
  color: #b8c5d6;
  font-size: 0.9rem;
  transition: all var(--transition-fast);
  text-decoration: none;
  font-weight: 500;
  padding: 4px 8px;
  border-radius: var(--border-radius-sm);
}

.footer-links-bottom a:hover {
  color: #ffffff;
  background: rgba(59, 130, 246, 0.2);
  transform: translateY(-1px);
}

/* Error Page Styling */
.error-page {
  padding: calc(80px + var(--spacing-3xl)) 0 var(--spacing-3xl);
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.error-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-4xl);
  align-items: center;
  max-width: var(--container-2xl);
  margin: 0 auto;
  text-align: left;
}

.error-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.error-number {
  font-size: 8rem;
  font-weight: 900;
  color: var(--primary-color);
  margin-bottom: var(--spacing-xl);
  line-height: 1;
}

.error-illustration {
  width: 300px;
  height: 200px;
  margin-bottom: var(--spacing-xl);
}

.error-text h1 {
  font-size: var(--text-5xl);
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.1;
}

.error-text p {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  line-height: 1.6;
}

.error-actions {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

/* Documentation Hub Styles */
.documentation-hub {
  padding: var(--spacing-xl) 0;
  background-color: var(--bg-secondary);
}

.doc-category {
  margin-bottom: var(--spacing-xl);
}

.category-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-lg);
  background-color: var(--bg-tertiary);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-primary);
}

.category-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--primary-color);
  border-radius: var(--border-radius-md);
  color: var(--text-inverse);
  flex-shrink: 0;
}

.category-icon svg {
  width: 24px;
  height: 24px;
}

.category-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.category-description {
  color: var(--text-secondary);
  margin: 0.5rem 0 0 0;
  font-size: 0.875rem;
}

.doc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.doc-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.doc-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  transform: translateX(-100%);
  transition: transform var(--transition-fast);
}

.doc-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-secondary);
}

.doc-card:hover::before {
  transform: translateX(0);
}

.doc-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-tertiary);
  border-radius: var(--border-radius-md);
  margin-bottom: var(--spacing-md);
  color: var(--primary-color);
}

.doc-icon svg {
  width: 20px;
  height: 20px;
}

.doc-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 var(--spacing-sm) 0;
}

.doc-description {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.5;
  margin: 0 0 var(--spacing-md) 0;
}

.doc-link {
  display: inline-flex;
  align-items: center;
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.875rem;
  transition: all var(--transition-fast);
}

.doc-link:hover {
  color: var(--accent-color);
  transform: translateX(2px);
}

/* Responsive Documentation Hub */
@media (max-width: 768px) {
  .documentation-hub {
    padding: var(--spacing-lg) 0;
  }
  
  .category-header {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-sm);
  }
  
  .category-icon {
    width: 40px;
    height: 40px;
  }
  
  .category-icon svg {
    width: 20px;
    height: 20px;
  }
  
  .category-title {
    font-size: 1.25rem;
  }
  
  .doc-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .doc-card {
    padding: var(--spacing-md);
  }
}

/* Sitemap Styles */
.sitemap {
  padding: var(--spacing-xl) 0;
  background-color: var(--bg-primary);
  border-top: 1px solid var(--border-primary);
}

.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
}

.sitemap-category {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  transition: all var(--transition-fast);
}

.sitemap-category:hover {
  border-color: var(--border-secondary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.sitemap-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 var(--spacing-md) 0;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.sitemap-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sitemap-links li {
  margin-bottom: var(--spacing-sm);
}

.sitemap-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  transition: all var(--transition-fast);
  display: block;
  padding: var(--spacing-xs) 0;
  border-left: 2px solid transparent;
  padding-left: var(--spacing-sm);
}

.sitemap-links a:hover {
  color: var(--primary-color);
  border-left-color: var(--primary-color);
  transform: translateX(2px);
}

/* Responsive Sitemap */
@media (max-width: 768px) {
  .sitemap {
    padding: var(--spacing-lg) 0;
  }
  
  .sitemap-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .sitemap-category {
    padding: var(--spacing-md);
  }
  
  .sitemap-title {
    font-size: 1rem;
  }
}

/* Tablet Responsive Design */
@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
  }
  
  .hero-content {
    padding-right: var(--spacing-md);
  }
  
  .hero-visual {
    min-height: 350px;
  }
  
  .hero-diagram {
    padding: var(--spacing-lg);
    flex-direction: column;
  }
  
  .diagram-node {
    max-width: none;
    min-width: auto;
  }
}

/* Mobile Navigation Menu */
@media (max-width: 768px) {
  .nav-menu.active {
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-primary);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-lg);
  }
  
  .nav-menu.active .nav-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .nav-menu.active .nav-link {
    padding: var(--spacing-md);
    text-align: center;
  }
  
  .nav-list {
    display: none;
  }
  
  .mobile-menu-toggle {
    display: flex;
  }
  
  .dropdown-menu {
    max-height: 300px;
    min-width: 180px;
  }
  
  .dropdown-menu::-webkit-scrollbar {
    width: 4px;
  }
}
  
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--spacing-2xl);
  }
  
  .hero-content {
    padding-right: 0;
    max-width: 100%;
  }
  
  .hero-visual {
    min-height: 300px;
  }
  
  .hero-diagram {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .diagram-node {
    max-width: none;
    min-width: auto;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-stats {
    justify-content: center;
  }
  
    
  .quick-start-content {
    grid-template-columns: 1fr 1fr;
    text-align: center;
  }
  
  .footer-content {
    grid-template-columns: 1fr 1fr;
    text-align: center;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .nav-container {
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  .hero {
    padding: calc(80px + var(--spacing-xl)) 0 var(--spacing-xl);
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-description {
    font-size: 1rem;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .features-grid,
  .docs-grid {
    grid-template-columns: 1fr;
  }
  
  .tech-grid {
    grid-template-columns: 1fr;
  }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.p-0 { padding: 0; }
.p-1 { padding: var(--spacing-sm); }
.p-2 { padding: var(--spacing-md); }
.p-3 { padding: var(--spacing-lg); }
.p-4 { padding: var(--spacing-xl); }

.hidden { display: none; }
.visible { visibility: visible; }
.invisible { visibility: hidden; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}