/**
 * Base CSS - Dark Theme Simplicity
 * Consolidated: Core styles, Layout, and Components
 * Version: 2.0.0
 * 
 * This file merges:
 * - core.css: Base styles, typography, and utilities
 * - layout.css: Containers, grids, flexbox, and responsive layout
 * - components.css: Reusable UI components (buttons, forms, tables, etc.)
 */

/* ============================================
   CSS CUSTOM PROPERTIES (VARIABLES)
   ============================================ */
:root {
  /* Colors */
  --dark-bg: rgb(26, 26, 28);
  --dark-bg-transparent: rgba(26, 26, 28, 0.95);
  --dark-300: rgba(31, 41, 55, 1);
  --dark-400: rgba(55, 65, 81, 1);
  
  --text-primary: rgba(255, 255, 255, 0.9);
  --text-secondary: rgba(255, 255, 255, 0.95);
  --text-muted: rgba(255, 255, 255, 0.7);
  --text-light: rgba(255, 255, 255, 0.5);
  
  --accent-blue: rgba(59, 130, 246, 0.9);
  --accent-blue-hover: rgba(59, 130, 246, 1);
  --accent-blue-muted: rgba(59, 130, 246, 0.3);
  
  --border-color: rgba(255, 255, 255, 0.1);
  --border-color-light: rgba(255, 255, 255, 0.05);
  
  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, 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;
  
  /* Breakpoints */
  --breakpoint-mobile: 768px;
  --breakpoint-tablet: 1024px;
  --breakpoint-desktop: 1280px;
  --breakpoint-wide: 1440px;
  
  /* Content Widths */
  --content-narrow: 650px;
  --content-default: 800px;
  --content-wide: 1000px;
  --content-full: 1200px;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.2s ease;
  --transition-slow: 0.3s ease;
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  
  /* 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;
}

/* ============================================
   BASE RESET & DARK THEME
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--dark-bg);
  min-height: 100vh;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

/* Headings */
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--spacing-md);
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-secondary);
}

h1 {
  font-size: 2.25rem;
  margin-bottom: var(--spacing-lg);
}

h2 {
  font-size: 1.875rem;
  margin-top: var(--spacing-2xl);
  margin-bottom: var(--spacing-lg);
}

h3 {
  font-size: 1.5rem;
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
}

h4 {
  font-size: 1.25rem;
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
}

h5 {
  font-size: 1.125rem;
}

h6 {
  font-size: 1rem;
}

/* Paragraphs */
p {
  margin: 0 0 var(--spacing-md);
  color: var(--text-primary);
}

/* Links */
a {
  color: var(--accent-blue);
  text-decoration: none;
  transition: color var(--transition-base);
}

a:hover {
  color: var(--accent-blue-hover);
}

a:focus {
  outline: 2px solid var(--accent-blue);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Lists */
ul, ol {
  margin: 0 0 var(--spacing-lg);
  padding-left: var(--spacing-xl);
}

li {
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

/* Blockquotes */
blockquote {
  margin: var(--spacing-lg) 0;
  padding: var(--spacing-md) var(--spacing-lg);
  border-left: 4px solid var(--accent-blue-muted);
  background: rgba(26, 26, 28, 0.8);
  border-radius: var(--radius-md);
  font-style: italic;
  color: var(--text-primary);
}

/* Code */
code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  padding: 0.2em 0.4em;
  background-color: rgba(12, 12, 14, 0.8);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
}

pre {
  margin: var(--spacing-xl) 0;
  padding: var(--spacing-lg);
  background-color: rgba(12, 12, 14, 0.8);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.5;
}

pre code {
  padding: 0;
  background: none;
  font-size: inherit;
}

/* Horizontal Rule */
hr {
  margin: var(--spacing-2xl) 0;
  border: 0;
  border-top: 1px solid var(--border-color);
}

/* ============================================
   CONTAINERS
   ============================================ */

/* Base Container */
.container {
  width: 100%;
  max-width: var(--content-full);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Content Containers */
.content-container {
  width: 100%;
  max-width: var(--content-default);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

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

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

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

/* Entry Content Container */
.entry-content {
  width: 100%;
  max-width: var(--content-default);
  margin: 0 auto;
}

/* ============================================
   MAIN LAYOUT STRUCTURE
   ============================================ */

/* Site Wrapper */
.site {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Site Main */
.site-main {
  flex: 1;
  width: 100%;
  background-color: var(--dark-bg);
}

/* Article Container */
.article-container {
  width: 100%;
  background-color: var(--dark-bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

/* ============================================
   GRID LAYOUTS
   ============================================ */

/* Base Grid */
.grid {
  display: grid;
  gap: var(--spacing-md);
}

.grid-cols-1 {
  grid-template-columns: repeat(1, 1fr);
}

.grid-cols-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-cols-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* Content Layout Grid */
.content-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
}

.content-layout--sidebar {
  grid-template-columns: 1fr;
}

/* ============================================
   FLEXBOX LAYOUTS
   ============================================ */

/* Page Header */
.page-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  padding: var(--spacing-2xl) var(--spacing-md);
  background-color: var(--dark-300);
  position: relative;
}

/* Hero Section */
.hero-container {
  width: 100%;
  margin-bottom: var(--spacing-xl);
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  padding: var(--spacing-xl) var(--spacing-md);
}

/* ============================================
   SIDEBAR LAYOUTS
   ============================================ */

.sidebar-container {
  position: sticky;
  top: 100px;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
}

/* ============================================
   SECTION LAYOUTS
   ============================================ */

.section {
  padding: var(--spacing-2xl) 0;
}

.section--large {
  padding: var(--spacing-3xl) 0;
}

.section--small {
  padding: var(--spacing-xl) 0;
}

/* ============================================
   CARD LAYOUTS
   ============================================ */

.card {
  background-color: var(--dark-300);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition-base);
}

.card:hover {
  transform: translateY(-2px);
}

.card-content {
  padding: var(--spacing-lg);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

/* Glass Card */
.glass-card {
  background: rgba(26, 26, 28, 0.8);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.glass-card:hover {
  border-color: var(--accent-blue-muted);
  transform: translateY(-2px);
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.5;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
  user-select: none;
}

.btn:focus {
  outline: 2px solid var(--accent-blue);
  outline-offset: 2px;
}

/* Button Variants */
.btn--primary {
  background-color: var(--accent-blue);
  color: white;
  border-color: var(--accent-blue);
}

.btn--primary:hover {
  background-color: var(--accent-blue-hover);
  border-color: var(--accent-blue-hover);
  color: white;
}

.btn--secondary {
  background-color: transparent;
  color: var(--text-primary);
  border-color: var(--border-color);
}

.btn--secondary:hover {
  background-color: var(--dark-300);
  color: var(--accent-blue);
  border-color: var(--accent-blue-muted);
}

.btn--ghost {
  background-color: transparent;
  color: var(--text-muted);
  border: none;
}

.btn--ghost:hover {
  background-color: var(--dark-300);
  color: var(--accent-blue);
}

/* Button Sizes */
.btn--sm {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: 0.875rem;
}

.btn--lg {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1.125rem;
}

.btn--xl {
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: 1.25rem;
}

/* Button States */
.btn:disabled,
.btn--disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.btn--loading {
  position: relative;
  color: transparent;
}

.btn--loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid transparent;
  border-top: 2px solid currentColor;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ============================================
   FORMS
   ============================================ */

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
  color: var(--text-secondary);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--dark-300);
  color: var(--text-primary);
  font-size: 1rem;
  transition: all var(--transition-base);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-muted);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-error {
  margin-top: var(--spacing-xs);
  color: #ef4444;
  font-size: 0.875rem;
}

.form-help {
  margin-top: var(--spacing-xs);
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* Checkbox and Radio */
.form-checkbox,
.form-radio {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.form-checkbox input,
.form-radio input {
  width: auto;
}

/* ============================================
   TABLES
   ============================================ */

.table-wrapper {
  width: 100%;
  overflow-x: auto;
  margin: var(--spacing-lg) 0;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--dark-300);
  font-size: 0.875rem;
}

.table th,
.table td {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--border-color);
  vertical-align: top;
}

.table th {
  background-color: var(--dark-400);
  font-weight: 600;
  color: var(--text-secondary);
  position: sticky;
  top: 0;
  z-index: 10;
}

.table tbody tr:hover {
  background-color: rgba(59, 130, 246, 0.05);
}

.table--striped tbody tr:nth-child(even) {
  background-color: rgba(255, 255, 255, 0.02);
}

.table--compact th,
.table--compact td {
  padding: var(--spacing-xs) var(--spacing-sm);
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

/* Text Alignment */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

/* Text Colors */
.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-light { color: var(--text-light); }
.text-accent { color: var(--accent-blue); }

/* Font Weights */
.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

/* Spacing Utilities */
.m-0 { margin: 0; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }
.mb-4 { margin-bottom: var(--spacing-xl); }
.mb-8 { margin-bottom: var(--spacing-xl); }
.mx-auto { margin-left: auto; margin-right: auto; }

.p-0 { padding: 0; }
.p-1 { padding: var(--spacing-sm); }
.p-1\.5 { padding: 0.375rem; }
.p-2 { padding: var(--spacing-md); }
.p-3 { padding: var(--spacing-lg); }
.p-4 { padding: var(--spacing-xl); }
.p-5 { padding: var(--spacing-2xl); }

/* Display Utilities */
.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }

/* Flexbox Utilities */
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-start { justify-content: flex-start; }
.justify-end { justify-content: flex-end; }
.flex-wrap { flex-wrap: wrap; }
.flex-col { flex-direction: column; }
.flex-row { flex-direction: row; }
.flex-1 { flex: 1; }
.flex-shrink-0 { flex-shrink: 0; }
.flex-grow { flex-grow: 1; }
.gap-1 { gap: var(--spacing-sm); }
.gap-2 { gap: var(--spacing-md); }
.gap-3 { gap: var(--spacing-lg); }
.gap-4 { gap: var(--spacing-xl); }

/* Width Utilities */
.w-full { width: 100%; }
.w-auto { width: auto; }
.max-w-full { max-width: 100%; }
.max-w-6xl { max-width: 72rem; }

/* Height utilities */
.h-full { height: 100%; }
.min-h-\[400px\] { min-height: 400px; }

/* Position utilities */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }
.inset-0 { 
  top: 0; 
  right: 0; 
  bottom: 0; 
  left: 0; 
}
.top-24 { top: 6rem; }
.z-0 { z-index: 0; }
.z-10 { z-index: 10; }
.z-20 { z-index: 20; }
.z-30 { z-index: 30; }
.z-40 { z-index: 40; }
.z-50 { z-index: 50; }

/* Background utilities */
.bg-dark-300 { background-color: var(--dark-300); }
.bg-dark-400 { background-color: var(--dark-400); }
.bg-black { background-color: black; }

/* Object fit utilities */
.object-cover { object-fit: cover; }
.object-contain { object-fit: contain; }

/* Opacity utilities */
.opacity-75 { opacity: 0.75; }
.opacity-90 { opacity: 0.9; }

/* Border Utilities */
.border { border: 1px solid var(--border-color); }
.border-t { border-top: 1px solid var(--border-color); }
.border-b { border-bottom: 1px solid var(--border-color); }
.rounded { border-radius: var(--radius-md); }
.rounded-sm { border-radius: var(--radius-sm); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }

/* Shadow Utilities */
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }

/* Overflow Utilities */
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.overflow-x-auto { overflow-x: auto; }
.overflow-y-auto { overflow-y: auto; }

/* Transition Utilities */
.transition-all {
  transition: all var(--transition-base);
}

.transition-colors {
  transition: color var(--transition-base), 
              background-color var(--transition-base), 
              border-color var(--transition-base);
}

/* Section spacing */
.space-y-1 > * + * { margin-top: var(--spacing-sm); }
.space-y-2 > * + * { margin-top: var(--spacing-md); }
.space-y-3 > * + * { margin-top: var(--spacing-lg); }
.space-y-4 > * + * { margin-top: var(--spacing-xl); }
.space-y-5 > * + * { margin-top: var(--spacing-2xl); }

/* ============================================
   INTERACTIVE FEEDBACK STYLES
   ============================================ */

/* Copy Feedback Notification */
.dts-copy-feedback {
  position: fixed;
  top: 20px;
  right: 20px;
  background: linear-gradient(135deg, #10B981, #059669);
  color: white;
  padding: 16px 24px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 600;
  z-index: 999999;
  transform: translateY(-100px) scale(0.9);
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 
              0 10px 10px -5px rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
}

.dts-copy-feedback.show {
  transform: translateY(0) scale(1);
  opacity: 1;
}

/* Button Active States */
.mobile-share-toggle.active,
.mobile-toc-toggle.active,
#share-btn.active {
  background-color: rgba(59, 130, 246, 0.2);
  border-color: rgba(59, 130, 246, 0.5);
}

/* Dropdown Animations */
#share-dropdown,
.mobile-share-dropdown,
.mobile-toc-dropdown {
  transition: opacity 0.2s ease-in-out, transform 0.2s ease-in-out;
}

/* TOC Link Active State */
.toc-link.active {
  color: #3B82F6;
  background-color: rgba(59, 130, 246, 0.1);
}

/* Share Button Hover Effects */
.share-dropdown a:hover,
.mobile-share-dropdown a:hover {
  transform: translateX(2px);
  transition: transform 0.2s ease;
}

/* ============================================
   NAVIGATION COMPONENTS
   ============================================ */

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

.nav-item {
  margin: 0;
}

.nav-link {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-primary);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
}

.nav-link:hover {
  background-color: var(--dark-300);
  color: var(--accent-blue);
}

.nav-link.active {
  background-color: var(--accent-blue-muted);
  color: var(--accent-blue-hover);
}

/* ============================================
   BREADCRUMBS
   ============================================ */

.breadcrumbs {
  display: inline-block;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 0.875rem;
  color: var(--text-muted);
}

.breadcrumbs a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-base);
}

.breadcrumbs a:hover {
  color: var(--accent-blue);
}

.breadcrumb-separator {
  color: var(--text-light);
}

/* ============================================
   BADGES
   ============================================ */

.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--radius-lg);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge--primary {
  background-color: var(--accent-blue);
  color: white;
}

.badge--secondary {
  background-color: var(--dark-400);
  color: var(--text-muted);
}

.badge--success {
  background-color: #10b981;
  color: white;
}

.badge--warning {
  background-color: #f59e0b;
  color: white;
}

.badge--error {
  background-color: #ef4444;
  color: white;
}

/* ============================================
   ALERTS
   ============================================ */

.alert {
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  border-left: 4px solid;
  margin: var(--spacing-lg) 0;
}

.alert--info {
  background-color: rgba(59, 130, 246, 0.1);
  border-color: var(--accent-blue);
  color: var(--text-primary);
}

.alert--success {
  background-color: rgba(16, 185, 129, 0.1);
  border-color: #10b981;
  color: var(--text-primary);
}

.alert--warning {
  background-color: rgba(245, 158, 11, 0.1);
  border-color: #f59e0b;
  color: var(--text-primary);
}

.alert--error {
  background-color: rgba(239, 68, 68, 0.1);
  border-color: #ef4444;
  color: var(--text-primary);
}

/* ============================================
   WORDPRESS WIDGETS
   ============================================ */

/* Widget general styling */
.widget {
  margin-bottom: var(--spacing-2xl);
  padding-bottom: var(--spacing-xl);
  border-bottom: 1px solid var(--border-color);
}

.widget:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.widget-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
  color: var(--text-secondary);
  position: relative;
  padding-bottom: var(--spacing-sm);
}

.widget-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 3rem;
  height: 2px;
  background-color: var(--accent-blue);
}

/* Widget text */
.widget_text {
  color: var(--text-primary);
  line-height: 1.6;
}

.widget_text p {
  margin-bottom: var(--spacing-md);
}

.widget_text p:last-child {
  margin-bottom: 0;
}

/* Widget links */
.widget a {
  color: var(--text-primary);
  text-decoration: none;
  transition: color var(--transition-base);
}

.widget a:hover {
  color: var(--accent-blue-hover);
}

/* Lists in widgets */
.widget ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.widget li {
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--border-color);
}

.widget li:last-child {
  border-bottom: none;
}

/* Search widget */
.widget_search .search-form {
  position: relative;
  margin-top: var(--spacing-sm);
}

.widget_search .search-field {
  width: 100%;
  padding: var(--spacing-sm) 3rem var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border-color);
  background-color: var(--dark-300);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  transition: all var(--transition-base);
}

.widget_search .search-field:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.widget_search .search-submit {
  position: absolute;
  top: 0;
  right: 0;
  height: 100%;
  padding: 0 var(--spacing-sm);
  background-color: var(--accent-blue);
  border: none;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: white;
  cursor: pointer;
  transition: background-color var(--transition-base);
}

.widget_search .search-submit:hover {
  background-color: var(--accent-blue-hover);
}

/* ============================================
   ACCESSIBILITY
   ============================================ */
.screen-reader-text {
  border: 0;
  clip: rect(1px, 1px, 1px, 1px);
  clip-path: inset(50%);
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute !important;
  width: 1px;
  word-wrap: normal !important;
}

.screen-reader-text:focus {
  background-color: var(--accent-blue);
  clip: auto !important;
  clip-path: none;
  color: #ffffff;
  display: block;
  font-size: 1rem;
  font-weight: 600;
  height: auto;
  left: 5px;
  line-height: normal;
  padding: 15px 23px 14px;
  text-decoration: none;
  top: 5px;
  width: auto;
  z-index: 100000;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--accent-blue);
  color: white;
  padding: 8px 16px;
  text-decoration: none;
  border-radius: var(--radius-sm);
  z-index: 100;
}

.skip-link:focus {
  top: 0;
}

/* Focus visible for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--accent-blue);
  outline-offset: 2px;
}

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

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --text-primary: #ffffff;
    --text-secondary: #ffffff;
    --accent-blue: #5eafff;
    --border-color: rgba(255, 255, 255, 0.3);
  }
}

/* ============================================
   RESPONSIVE BREAKPOINTS
   ============================================ */

/* Tablet (768px and up) */
@media (min-width: 768px) {
  .container {
    padding: 0 var(--spacing-lg);
  }
  
  .content-container {
    padding: 0 var(--spacing-xl);
  }
  
  .hero-content {
    padding: var(--spacing-2xl) var(--spacing-xl);
  }
  
  .section {
    padding: var(--spacing-3xl) 0;
  }
  
  .section--large {
    padding: calc(var(--spacing-3xl) * 1.5) 0;
  }
  
  /* Grid responsive */
  .md\:grid-cols-2 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .md\:grid-cols-3 {
    grid-template-columns: repeat(3, 1fr);
  }
  
  /* Flex responsive */
  .md\:flex-row {
    flex-direction: row;
  }
  
  .md\:items-start {
    align-items: flex-start;
  }
  
  /* Table font size */
  .table {
    font-size: 1rem;
  }
  
  .table th,
  .table td {
    padding: var(--spacing-md) var(--spacing-lg);
  }
}

/* Desktop (1024px and up) */
@media (min-width: 1024px) {
  .container {
    padding: 0 var(--spacing-xl);
  }
  
  .page-header {
    min-height: 400px;
    padding: var(--spacing-3xl) var(--spacing-xl);
  }
  
  /* Content with sidebar layout */
  .content-layout--sidebar {
    grid-template-columns: 1fr 300px;
    gap: var(--spacing-2xl);
  }
  
  .content-layout--sidebar-left {
    grid-template-columns: 300px 1fr;
  }
  
  /* Entry content sizing */
  .entry-content {
    font-size: 1.125rem;
  }
  
  .no-sidebar .entry-content {
    max-width: var(--content-wide);
    font-size: 1.2rem;
  }
  
  /* Grid responsive */
  .lg\:grid-cols-3 {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .lg\:grid-cols-4 {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .lg\:grid-cols-5 {
    grid-template-columns: repeat(5, 1fr);
  }
  
  /* Display utilities */
  .lg\:block {
    display: block;
  }
}

/* Large Desktop (1280px and up) */
@media (min-width: 1280px) {
  .content-container {
    padding: 0 var(--spacing-2xl);
  }
  
  .no-sidebar .entry-content {
    max-width: var(--content-full);
  }
  
  /* Grid responsive */
  .xl\:grid-cols-4 {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .xl\:grid-cols-5 {
    grid-template-columns: repeat(5, 1fr);
  }
}

/* Wide Desktop (1440px and up) */
@media (min-width: 1440px) {
  .no-sidebar .entry-content {
    max-width: 1100px;
  }
}

/* ============================================
   SPECIAL LAYOUTS
   ============================================ */

/* Full Width Section */
.full-width {
  width: 100vw;
  position: relative;
  left: 50%;
  right: 50%;
  margin-left: -50vw;
  margin-right: -50vw;
}

/* Centered Content */
.center-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

/* Split Layout */
.split-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
}

@media (min-width: 768px) {
  .split-layout {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }
}

/* Masonry Layout */
.masonry {
  columns: 1;
  column-gap: var(--spacing-lg);
}

.masonry > * {
  break-inside: avoid;
  margin-bottom: var(--spacing-lg);
}

@media (min-width: 768px) {
  .masonry {
    columns: 2;
  }
}

@media (min-width: 1024px) {
  .masonry {
    columns: 3;
  }
}

/* Responsive padding */
.px-responsive {
  padding-left: var(--spacing-md);
  padding-right: var(--spacing-md);
}

@media (min-width: 768px) {
  .px-responsive {
    padding-left: var(--spacing-lg);
    padding-right: var(--spacing-lg);
  }
}

@media (min-width: 1024px) {
  .px-responsive {
    padding-left: var(--spacing-xl);
    padding-right: var(--spacing-xl);
  }
}