/* ==========================================================================
   Silksong Map - 修复后的主样式表
   ========================================================================== */

/* CSS Custom Properties (Variables) */
:root {
  /* Enhanced Color Palette - Silksong Inspired */
  --primary-color: #667eea;
  --primary-dark: #5a67d8;
  --primary-light: #7c91f5;
  --secondary-color: #764ba2;
  --secondary-dark: #6b3a8c;
  --accent-color: #00d4ff;
  --accent-dark: #00b8d9;
  
  /* Semantic Colors */
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --error-color: #ef4444;
  --info-color: #3b82f6;
  
  /* Text Colors */
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-tertiary: #94a3b8;
  --text-inverse: #ffffff;
  
  /* Background Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-surface: #ffffff;
  --bg-overlay: rgba(0, 0, 0, 0.5);
  
  /* Background aliases for compatibility */
  --background-primary: var(--bg-primary);
  --background-secondary: var(--bg-secondary);
  --background-tertiary: var(--bg-tertiary);
  
  /* Border Colors */
  --border-primary: #e2e8f0;
  --border-secondary: #cbd5e1;
  --border-accent: var(--primary-color);
  --border-color: var(--border-primary);
  --border-light: #f1f5f9;
  
  /* Dark Theme Colors */
  --dark-text-primary: #f1f5f9;
  --dark-text-secondary: #cbd5e1;
  --dark-text-tertiary: #94a3b8;
  --dark-bg-primary: #0f172a;
  --dark-bg-secondary: #1e293b;
  --dark-bg-tertiary: #334155;
  --dark-bg-surface: #1e293b;
  --dark-border-primary: #334155;
  --dark-border-secondary: #475569;
  --dark-border-color: var(--dark-border-primary);
  
  /* Typography */
  --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-family-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
  
  /* Font Sizes - Fluid Typography */
  --font-size-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --font-size-sm: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);
  --font-size-base: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
  --font-size-lg: clamp(1.125rem, 1rem + 0.625vw, 1.25rem);
  --font-size-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
  --font-size-2xl: clamp(1.5rem, 1.3rem + 1vw, 1.875rem);
  --font-size-3xl: clamp(1.875rem, 1.6rem + 1.375vw, 2.25rem);
  --font-size-4xl: clamp(2.25rem, 1.9rem + 1.75vw, 3rem);
  --font-size-5xl: clamp(3rem, 2.5rem + 2.5vw, 4rem);
  
  /* Spacing Scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  
  /* Spacing aliases for compatibility */
  --spacing-xs: var(--space-1);
  --spacing-sm: var(--space-2);
  --spacing-md: var(--space-4);
  --spacing-lg: var(--space-6);
  --spacing-xl: var(--space-8);
  
  /* Layout */
  --container-max-width: 1200px;
  --sidebar-width: 320px;
  --header-height: 120px;
  --content-width: 65ch;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  
  /* Border radius aliases for compatibility */
  --border-radius: var(--radius-md);
  --border-radius-lg: var(--radius-lg);
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Shadow aliases for compatibility */
  --box-shadow: var(--shadow-md);
  --box-shadow-lg: var(--shadow-lg);
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Z-index Scale */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
}

/* Theme System */
[data-theme="dark"] {
  --text-primary: var(--dark-text-primary);
  --text-secondary: var(--dark-text-secondary);
  --text-tertiary: var(--dark-text-tertiary);
  --bg-primary: var(--dark-bg-primary);
  --bg-secondary: var(--dark-bg-secondary);
  --bg-tertiary: var(--dark-bg-tertiary);
  --bg-surface: var(--dark-bg-surface);
  --border-primary: var(--dark-border-primary);
  --border-secondary: var(--dark-border-secondary);
  --border-color: var(--dark-border-color);
  --background-primary: var(--dark-bg-primary);
  --background-secondary: var(--dark-bg-secondary);
  --background-tertiary: var(--dark-bg-tertiary);
}

/* Auto theme detection */
@media (prefers-color-scheme: dark) {
  [data-theme="auto"] {
    --text-primary: var(--dark-text-primary);
    --text-secondary: var(--dark-text-secondary);
    --text-tertiary: var(--dark-text-tertiary);
    --bg-primary: var(--dark-bg-primary);
    --bg-secondary: var(--dark-bg-secondary);
    --bg-tertiary: var(--dark-bg-tertiary);
    --bg-surface: var(--dark-bg-surface);
    --border-primary: var(--dark-border-primary);
    --border-secondary: var(--dark-border-secondary);
    --border-color: var(--dark-border-color);
    --background-primary: var(--dark-bg-primary);
    --background-secondary: var(--dark-bg-secondary);
    --background-tertiary: var(--dark-bg-tertiary);
  }
}

/* ==========================================================================
   Modern CSS Reset
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

html {
  hanging-punctuation: first last;
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color var(--transition-base), color var(--transition-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

input,
button,
textarea,
select {
  font: inherit;
}

p,
h1,
h2,
h3,
h4,
h5,
h6 {
  overflow-wrap: break-word;
}

#root,
#__next {
  isolation: isolate;
}

/* ==========================================================================
   Typography System
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
  letter-spacing: -0.025em;
}

h1 { 
  font-size: var(--font-size-4xl); 
  margin-bottom: var(--space-6);
  font-weight: 900;
}

h2 { 
  font-size: var(--font-size-3xl); 
  margin-bottom: var(--space-5);
  font-weight: 800;
}

h3 { 
  font-size: var(--font-size-2xl); 
  margin-bottom: var(--space-4);
  font-weight: 700;
}

h4 { 
  font-size: var(--font-size-xl); 
  margin-bottom: var(--space-3);
  font-weight: 600;
}

h5 { 
  font-size: var(--font-size-lg); 
  margin-bottom: var(--space-2);
  font-weight: 600;
}

h6 { 
  font-size: var(--font-size-base); 
  margin-bottom: var(--space-2);
  font-weight: 600;
}

p {
  margin-bottom: var(--space-4);
  line-height: 1.7;
  max-width: var(--content-width);
}

a {
  color: var(--primary-color);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
  transition: all var(--transition-fast);
}

a:hover {
  color: var(--primary-dark);
  text-decoration-thickness: 2px;
}

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

/* ==========================================================================
   Layout System
   ========================================================================== */

.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-6);
  }
}

.content-wrapper {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-top: var(--space-6);
  align-items: start;
}

@media (min-width: 1024px) {
  .content-wrapper {
    grid-template-columns: 1fr var(--sidebar-width);
  }
}

.main-content {
  flex: 1;
  padding-top: var(--header-height);
  min-height: calc(100vh - var(--header-height));
}

.main-content-area {
  background-color: var(--bg-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-primary);
}

@media (max-width: 767px) {
  .main-content-area {
    padding: var(--space-6) var(--space-4);
  }
}

/* Skip Link */
.skip-link {
  position: absolute;
  top: -40px;
  left: var(--space-2);
  background: var(--primary-color);
  color: var(--text-inverse);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 600;
  z-index: var(--z-tooltip);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-2);
}

/* ==========================================================================
   Enhanced Header System
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  background: rgba(26, 26, 46, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-base);
}

.utility-bar {
  background: rgba(0, 0, 0, 0.2);
  padding: var(--space-2) 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.utility-left,
.utility-right {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

@media (max-width: 767px) {
  .utility-bar {
    flex-direction: column;
    gap: var(--space-2);
    text-align: center;
    align-items: center;
  }
  
  .utility-left,
  .utility-right {
    justify-content: center;
    flex-wrap: wrap;
  }
}

.lang-link {
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.lang-link:hover {
  background: rgba(255, 255, 255, 0.1);
  color: white;
}

.utility-link {
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--font-size-sm);
  text-decoration: none;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.utility-link:hover {
  color: white;
  background: rgba(255, 255, 255, 0.1);
}

/* Theme Toggle */
.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  color: rgba(255, 255, 255, 0.8);
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.theme-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
  color: white;
}

.theme-icon {
  display: none;
  font-size: var(--font-size-lg);
}

[data-theme="light"] .theme-icon.light,
[data-theme="dark"] .theme-icon.dark,
[data-theme="auto"] .theme-icon.auto {
  display: block;
}

/* Header Main */
.header-main {
  padding: var(--space-4) 0;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--space-6);
}

@media (max-width: 1023px) {
  .header-main {
    grid-template-columns: auto auto 1fr auto;
    gap: var(--space-4);
  }
}

@media (max-width: 767px) {
  .header-main {
    grid-template-columns: 1fr auto;
    gap: var(--space-3);
  }
}

/* Site Branding */
.site-branding {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: white;
  transition: transform var(--transition-fast);
}

.site-logo:hover {
  transform: scale(1.02);
  color: white;
}

.site-logo img {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.site-title {
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: white;
  line-height: 1;
  margin: 0;
}

.site-tagline {
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.7);
  margin: 0;
  line-height: 1;
}

@media (max-width: 767px) {
  .logo-text {
    display: none;
  }
}

/* Enhanced Search */
.search-container {
  position: relative;
  width: 100%;
  max-width: 400px;
}

.desktop-search {
  display: none;
}

@media (min-width: 1024px) {
  .desktop-search {
    display: block;
  }
  .mobile-search {
    display: none;
  }
}

@media (max-width: 767px) {
  .search-container {
    order: 3;
    grid-column: 1 / -1;
    margin-top: var(--space-3);
    max-width: none;
  }
}

.search-form {
  position: relative;
  display: flex;
  align-items: center;
}

.search-input {
  width: 100%;
  padding: var(--space-3) var(--space-12) var(--space-3) var(--space-4);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-xl);
  color: white;
  font-size: var(--font-size-sm);
  transition: all var(--transition-base);
}

.search-input::placeholder {
  color: rgba(255, 255, 255, 0.6);
}

.search-input:focus {
  outline: none;
  background: rgba(255, 255, 255, 0.15);
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.2);
}

.search-button {
  position: absolute;
  right: var(--space-2);
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.7);
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.search-button:hover {
  color: white;
  background: rgba(255, 255, 255, 0.1);
}

.search-results {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--bg-surface);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  margin-top: var(--space-2);
  max-height: 400px;
  overflow-y: auto;
  z-index: var(--z-dropdown);
}

/* Mobile Menu */
.mobile-menu-toggle {
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.2);
  cursor: pointer;
  padding: 12px;
  border-radius: 8px;
  color: rgba(255, 255, 255, 0.8);
  transition: all 0.25s ease;
  display: block;
  position: relative;
  z-index: 1001;
}

.mobile-menu-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border-color: rgba(255, 255, 255, 0.3);
  transform: scale(1.05);
}

.mobile-menu-toggle:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

@media (min-width: 1024px) {
  .mobile-menu-toggle {
    display: none;
  }
}

.hamburger {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 22px;
  height: 18px;
  justify-content: center;
}

.hamburger span {
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  transform-origin: center;
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
  background: var(--accent-color);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger span:nth-child(2) {
  opacity: 0;
  transform: scale(0);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
  background: var(--accent-color);
}

/* Enhanced Navigation */
.main-navigation {
  background: rgba(26, 26, 46, 0.98);
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(12px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.main-navigation.active {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

@media (min-width: 1024px) {
  .main-navigation {
    position: static;
    background: none;
    transform: none;
    opacity: 1;
    visibility: visible;
    border: none;
    backdrop-filter: none;
    box-shadow: none;
  }
}

.nav-menu {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}

@media (max-width: 1023px) {
  .nav-menu {
    padding: 24px 0;
    max-height: calc(100vh - 200px);
    overflow-y: auto;
  }
}

@media (min-width: 1024px) {
  .nav-menu {
    flex-direction: row;
    gap: 8px;
  }
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 24px;
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  font-weight: 500;
  font-size: 15px;
  transition: all 0.25s ease;
  border-left: 3px solid transparent;
  position: relative;
  overflow: hidden;
}

.nav-link::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transition: left 0.5s ease;
}

.nav-link:hover::before {
  left: 100%;
}

.nav-link:hover,
.nav-item.active .nav-link {
  color: white;
  background: rgba(255, 255, 255, 0.1);
  border-left-color: var(--accent-color);
  text-decoration: none;
  transform: translateX(4px);
}

@media (min-width: 1024px) {
  .nav-link {
    padding: 12px 16px;
    border-radius: 12px;
    border-left: none;
    border-bottom: 3px solid transparent;
  }
  
  .nav-link:hover,
  .nav-item.active .nav-link {
    border-left-color: transparent;
    border-bottom-color: var(--accent-color);
    transform: translateY(-2px);
  }
}

.nav-icon {
  font-size: 18px;
  flex-shrink: 0;
  width: 1.2em;
  text-align: center;
  transition: transform 0.25s ease;
}

.nav-link:hover .nav-icon,
.nav-item.active .nav-link .nav-icon {
  transform: scale(1.1);
}

.nav-text {
  font-weight: 600;
}

@media (max-width: 767px) {
  .nav-text {
    font-size: var(--font-size-sm);
  }
}

/* ==========================================================================
   Enhanced Breadcrumb System
   ========================================================================== */

.breadcrumb {
  margin-bottom: var(--space-6);
  padding: var(--space-3) 0;
}

.breadcrumb-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.breadcrumb-item:not(:last-child)::after {
  content: '';
  width: 4px;
  height: 4px;
  background: var(--text-tertiary);
  border-radius: 50%;
  margin-left: var(--space-2);
}

.breadcrumb-item a {
  color: var(--text-secondary);
  text-decoration: none;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

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

.breadcrumb-item.active {
  color: var(--text-primary);
  font-weight: 500;
}

/* ==========================================================================
   Enhanced Sidebar System
   ========================================================================== */

.sidebar {
  padding-top: 0;
}

@media (max-width: 1023px) {
  .sidebar {
    order: -1;
    margin-bottom: var(--space-8);
  }
}

.sidebar-widget {
  background: var(--bg-surface);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  margin-bottom: var(--space-6);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.sidebar-widget:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

@media (max-width: 767px) {
  .sidebar-widget {
    padding: var(--space-4);
  }
}

.widget-title {
  margin: 0 0 var(--space-4) 0;
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--text-primary);
  position: relative;
  padding-bottom: var(--space-2);
}

.widget-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  border-radius: 2px;
}

/* Quick Navigation */
.quick-nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.quick-nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--text-primary);
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.quick-nav-link::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;
}

.quick-nav-link:hover::before {
  left: 100%;
}

.quick-nav-link:hover,
.quick-nav-link.active {
  background: var(--primary-color);
  color: white;
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
}

.quick-nav-link .nav-icon {
  font-size: var(--font-size-xl);
  flex-shrink: 0;
}

.quick-nav-link .nav-text {
  font-weight: 600;
  font-size: var(--font-size-sm);
}

.quick-nav-link .nav-description {
  font-size: var(--font-size-xs);
  opacity: 0.8;
  margin-top: 2px;
}

/* Progress Widget */
.progress-widget {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  border: none;
}

.progress-widget .widget-title {
  color: white;
}

.progress-widget .widget-title::after {
  background: rgba(255, 255, 255, 0.3);
}

.progress-summary {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.progress-item {
  position: relative;
}

.progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-2);
}

.progress-label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: rgba(255, 255, 255, 0.9);
}

.progress-value {
  font-size: var(--font-size-xs);
  font-family: var(--font-family-mono);
  color: rgba(255, 255, 255, 0.8);
  background: rgba(255, 255, 255, 0.1);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-md);
}

.progress-bar {
  height: 8px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 4px;
  overflow: hidden;
  position: relative;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-color), rgba(255, 255, 255, 0.9));
  border-radius: 4px;
  transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.progress-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  0% { left: -100%; }
  100% { left: 100%; }
}

.widget-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: rgba(255, 255, 255, 0.2);
  color: white;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  text-decoration: none;
  font-weight: 600;
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
  margin-top: var(--space-4);
  backdrop-filter: blur(8px);
}

.widget-cta:hover {
  background: rgba(255, 255, 255, 0.3);
  color: white;
  transform: translateY(-1px);
}

/* Recent Updates */
.recent-updates-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.update-item {
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
}

.update-item:hover {
  background: var(--bg-secondary);
}

.update-link {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3);
  text-decoration: none;
  color: var(--text-primary);
  border-radius: var(--radius-lg);
}

.update-icon {
  font-size: var(--font-size-lg);
  flex-shrink: 0;
  margin-top: 2px;
}

.update-content {
  flex: 1;
  min-width: 0;
}

.update-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: var(--space-1);
  color: var(--text-primary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.update-date {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
  font-family: var(--font-family-mono);
}

/* Ad Placeholder */
.ad-widget {
  background: var(--bg-tertiary);
  border: 2px dashed var(--border-secondary);
}

.ad-placeholder {
  text-align: center;
  padding: var(--space-8);
  color: var(--text-tertiary);
  font-size: var(--font-size-sm);
  font-style: italic;
}

/* ==========================================================================
   Enhanced Footer System
   ========================================================================== */

.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-primary);
  margin-top: auto;
  padding: var(--space-12) 0 var(--space-6);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

.footer-section {
  min-width: 0;
}

.footer-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--space-4);
  color: var(--primary-color);
}

.footer-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  padding: var(--space-1) 0;
  transition: all var(--transition-fast);
  font-size: var(--font-size-sm);
}

.footer-nav a:hover {
  color: var(--primary-color);
  padding-left: var(--space-2);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-6);
  border-top: 1px solid var(--border-primary);
  flex-wrap: wrap;
  gap: var(--space-4);
}

@media (max-width: 767px) {
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

.footer-info {
  flex: 1;
  min-width: 0;
}

.copyright {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: var(--space-1);
}

.disclaimer {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
  line-height: 1.4;
}

.footer-social {
  display: flex;
  gap: var(--space-3);
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--bg-primary);
  color: var(--text-secondary);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
  text-decoration: none;
  border: 1px solid var(--border-primary);
}

.footer-social a:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

.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;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.font-mono { font-family: var(--font-family-mono); }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }

.hidden { display: none; }

/* Loading states */
.loading {
  opacity: 0.6;
  pointer-events: none;
}

/* Focus management */
.focus-within:focus-within {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Smooth animations */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   Enhanced Search Results
   ========================================================================== */

.search-results[hidden] {
  display: none;
}

.search-result {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  color: var(--text-primary);
  text-decoration: none;
  transition: all 0.25s ease;
  border-bottom: 1px solid var(--border-primary);
}

.search-result:last-child {
  border-bottom: none;
}

.search-result:hover,
.search-result:focus {
  background: var(--bg-secondary);
  color: var(--primary-color);
  text-decoration: none;
  transform: translateX(4px);
}

.search-result.no-results {
  padding: 20px 16px;
  text-align: center;
  color: var(--text-secondary);
  cursor: default;
}

.search-result.no-results:hover {
  background: none;
  transform: none;
}

.result-icon {
  font-size: 18px;
  flex-shrink: 0;
  width: 24px;
  text-align: center;
}

.result-content {
  flex: 1;
  min-width: 0;
}

.result-title {
  font-weight: 600;
  margin-bottom: 2px;
  color: var(--text-primary);
}

.result-title mark {
  background: var(--accent-color);
  color: white;
  padding: 1px 3px;
  border-radius: 3px;
}

.result-type {
  font-size: 12px;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.result-description {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 2px;
}

/* ==========================================================================
   Performance Optimizations
   ========================================================================== */

.site-header,
.main-navigation,
.nav-link,
.search-input,
.mobile-menu-toggle {
  will-change: transform;
}

/* Reduce animations for better performance on slower devices */
@media (prefers-reduced-motion: reduce) {
  .nav-link,
  .search-input,
  .mobile-menu-toggle,
  .hamburger span,
  .search-result {
    transition-duration: 0.1s;
  }
  
  .nav-link::before {
    display: none;
  }
  
  .nav-link:hover .nav-icon {
    transform: none;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .nav-link {
    border: 1px solid rgba(255, 255, 255, 0.3);
  }
  
  .search-input {
    border: 2px solid rgba(255, 255, 255, 0.5);
  }
  
  .mobile-menu-toggle {
    border: 2px solid rgba(255, 255, 255, 0.5);
  }
}

/* Print styles */
@media print {
  .site-header,
  .main-navigation,
  .search-container {
    display: none;
  }
}

/* ==========================================================================
   Keyboard Navigation and Accessibility
   ========================================================================== */

body.keyboard-navigation *:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Enhanced scrolling behavior */
.site-header {
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.site-header.scrolled {
  background: rgba(26, 26, 46, 0.98);
  backdrop-filter: blur(16px);
  box-shadow: 0 4px 32px rgba(0, 0, 0, 0.2);
}

.site-header.header-hidden {
  transform: translateY(-100%);
}