/* ==========================================================================
   a11y-feedback Demo Site Styles
   A dark, accessible theme with WCAG AAA contrast ratios
   ========================================================================== */

/* CSS Custom Properties */
:root {
  /* Colors - Dark Theme */
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-tertiary: #1a1a24;
  --bg-card: #16161f;
  --bg-elevated: #1e1e2a;
  
  /* Text Colors - High Contrast */
  --text-primary: #f4f4f6;
  --text-secondary: #a8a8b3;
  --text-muted: #6b6b78;
  
  /* Accent Colors */
  --accent-primary: #6366f1;
  --accent-primary-hover: #818cf8;
  --accent-secondary: #22d3ee;
  --accent-gradient: linear-gradient(135deg, #6366f1, #22d3ee);
  
  /* Semantic Colors */
  --color-success: #10b981;
  --color-success-bg: rgba(16, 185, 129, 0.1);
  --color-error: #ef4444;
  --color-error-bg: rgba(239, 68, 68, 0.1);
  --color-warning: #f59e0b;
  --color-warning-bg: rgba(245, 158, 11, 0.1);
  --color-info: #3b82f6;
  --color-info-bg: rgba(59, 130, 246, 0.1);
  --color-loading: #8b5cf6;
  --color-loading-bg: rgba(139, 92, 246, 0.1);
  
  /* Borders */
  --border-color: #2a2a36;
  --border-color-hover: #3a3a48;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.15);
  
  /* Spacing */
  --container-max: 1200px;
  --section-padding: 5rem;
  
  /* Typography */
  --font-sans: 'Outfit', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
}

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

/* ==========================================================================
   Reset & Base
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Skip Link */
.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  padding: 1rem 2rem;
  background: var(--accent-primary);
  color: white;
  font-weight: 600;
  border-radius: var(--radius-md);
  z-index: 9999;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 1rem;
  outline: 3px solid var(--accent-secondary);
  outline-offset: 2px;
}

/* Container */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

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

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

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

/* Code */
code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--bg-tertiary);
  padding: 0.125rem 0.375rem;
  border-radius: var(--radius-sm);
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 1.125rem;
  color: var(--text-primary);
}

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

.logo-icon {
  font-size: 1.5rem;
}

.version-badge {
  background: var(--accent-gradient);
  color: white;
  font-size: 0.625rem;
  font-weight: 600;
  padding: 0.125rem 0.375rem;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Desktop Navigation */
.nav-desktop {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.9375rem;
  transition: color var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

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

.nav-link-github svg {
  opacity: 0.7;
}

.nav-link-github:hover svg {
  opacity: 1;
}

/* Mobile Menu Button */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
}

.hamburger-line {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-fast);
}

.mobile-menu-btn[aria-expanded="true"] .hamburger-line:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn[aria-expanded="true"] .hamburger-line:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn[aria-expanded="true"] .hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Navigation */
.nav-mobile {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem;
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-normal);
}

.nav-mobile:not([hidden]) {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.mobile-nav-content {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.mobile-nav-link {
  display: block;
  padding: 0.75rem 1rem;
  color: var(--text-primary);
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.mobile-nav-link:hover {
  background: var(--bg-tertiary);
}

@media (max-width: 768px) {
  .nav-desktop {
    display: none;
  }
  
  .mobile-menu-btn {
    display: flex;
  }
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
  padding: 8rem 0 5rem;
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  position: relative;
  overflow: hidden;
}

.hero-bg-pattern {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(ellipse at 20% 30%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 70%, rgba(34, 211, 238, 0.06) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 2rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.badge-dot {
  width: 8px;
  height: 8px;
  background: var(--color-success);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.hero-title-line {
  display: block;
}

.gradient-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 1rem;
}

.hero-tagline {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
}

.hero-tagline strong {
  color: var(--text-secondary);
}

/* Install Box */
.install-box {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 0.75rem 1rem;
  margin-bottom: 2rem;
}

.install-code {
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  background: transparent;
  padding: 0;
  color: var(--text-primary);
}

.copy-btn {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 0.75rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.8125rem;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.copy-btn:hover {
  background: var(--border-color);
  color: var(--text-primary);
}

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

.copy-btn.copied {
  background: var(--color-success-bg);
  border-color: var(--color-success);
  color: var(--color-success);
}

/* Hero Links */
.hero-links {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

/* Hero Stats */
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  flex-wrap: wrap;
}

.stat {
  text-align: center;
}

.stat-value {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

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

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

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

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

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

.btn-large {
  padding: 1rem 2rem;
  font-size: 1.0625rem;
}

.btn-small {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

/* ==========================================================================
   Sections
   ========================================================================== */

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

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 0.75rem;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  text-align: center;
  max-width: 600px;
  margin: 0 auto 3rem;
}

/* ==========================================================================
   Screen Reader Panel
   ========================================================================== */

.sr-panel {
  background: linear-gradient(135deg, var(--bg-card), var(--bg-elevated));
  border: 1px solid var(--accent-primary);
  border-radius: var(--radius-xl);
  margin-bottom: 2rem;
  overflow: hidden;
}

.sr-panel-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.5rem;
  background: rgba(99, 102, 241, 0.1);
  border-bottom: 1px solid var(--border-color);
}

.sr-panel-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--accent-primary);
  border-radius: var(--radius-lg);
  color: white;
}

.sr-panel-title {
  flex: 1;
}

.sr-panel-title h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.125rem;
}

.sr-panel-title p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.sr-panel-clear {
  padding: 0.5rem 1rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.sr-panel-clear:hover {
  background: var(--bg-elevated);
  color: var(--text-primary);
}

.sr-panel-timeline {
  padding: 1rem 1.5rem;
  max-height: 200px;
  overflow-y: auto;
}

.sr-empty {
  color: var(--text-muted);
  font-style: italic;
  text-align: center;
  padding: 1rem;
}

.sr-entry {
  display: flex;
  gap: 1rem;
  padding: 0.75rem;
  margin-bottom: 0.5rem;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  animation: slideIn 0.2s ease;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(-10px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.sr-entry-time {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  white-space: nowrap;
}

.sr-entry-content {
  flex: 1;
}

.sr-entry-type {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  margin-right: 0.5rem;
}

.sr-entry-type-polite {
  background: var(--color-info-bg);
  color: var(--color-info);
}

.sr-entry-type-assertive {
  background: var(--color-error-bg);
  color: var(--color-error);
}

.sr-entry-message {
  color: var(--text-primary);
}

/* ==========================================================================
   Demo Section
   ========================================================================== */

.demo-section {
  background: var(--bg-secondary);
}

.demo-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.demo-card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.demo-card-description {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  margin-bottom: 1.25rem;
}

/* Demo Card New Badge */
.demo-card-new {
  position: relative;
  border-color: var(--accent-primary);
  background: linear-gradient(135deg, var(--bg-card), rgba(99, 102, 241, 0.05));
}

.new-badge {
  position: absolute;
  top: -0.625rem;
  right: 1rem;
  background: var(--accent-gradient);
  color: white;
  font-size: 0.6875rem;
  font-weight: 600;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.new-tag {
  background: var(--color-success);
  color: white;
  font-size: 0.625rem;
  font-weight: 600;
  padding: 0.125rem 0.375rem;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  margin-left: 0.5rem;
}

/* Visual Toggle */
.visual-toggle-card {
  background: linear-gradient(135deg, var(--bg-card), var(--bg-elevated));
  border-color: var(--accent-primary);
}

.toggle-row {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.toggle-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.toggle-label {
  flex: 1;
}

.toggle-text {
  font-weight: 600;
  display: block;
  margin-bottom: 0.25rem;
}

.toggle-hint {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.toggle-btn {
  position: relative;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.toggle-btn:focus {
  outline: none;
}

.toggle-btn:focus .toggle-track {
  box-shadow: 0 0 0 3px var(--accent-primary);
}

.toggle-track {
  display: block;
  width: 56px;
  height: 30px;
  background: var(--bg-tertiary);
  border: 2px solid var(--border-color);
  border-radius: 15px;
  transition: all var(--transition-fast);
}

.toggle-thumb {
  display: block;
  width: 22px;
  height: 22px;
  background: var(--text-muted);
  border-radius: 50%;
  position: absolute;
  top: 4px;
  left: 4px;
  transition: all var(--transition-fast);
}

.toggle-btn[aria-checked="true"] .toggle-track {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
}

.toggle-btn[aria-checked="true"] .toggle-thumb {
  background: white;
  left: 30px;
}

/* Demo Buttons */
.demo-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.demo-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.btn-icon {
  font-size: 1rem;
}

.demo-btn-success {
  background: var(--color-success-bg);
  color: var(--color-success);
  border: 1px solid var(--color-success);
}

.demo-btn-success:hover {
  background: var(--color-success);
  color: white;
}

.demo-btn-error {
  background: var(--color-error-bg);
  color: var(--color-error);
  border: 1px solid var(--color-error);
}

.demo-btn-error:hover {
  background: var(--color-error);
  color: white;
}

.demo-btn-warning {
  background: var(--color-warning-bg);
  color: var(--color-warning);
  border: 1px solid var(--color-warning);
}

.demo-btn-warning:hover {
  background: var(--color-warning);
  color: black;
}

.demo-btn-info {
  background: var(--color-info-bg);
  color: var(--color-info);
  border: 1px solid var(--color-info);
}

.demo-btn-info:hover {
  background: var(--color-info);
  color: white;
}

.demo-btn-loading {
  background: var(--color-loading-bg);
  color: var(--color-loading);
  border: 1px solid var(--color-loading);
}

.demo-btn-loading:hover {
  background: var(--color-loading);
  color: white;
}

.demo-btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.demo-btn-secondary:hover {
  background: var(--bg-elevated);
  color: var(--text-primary);
}

/* Form */
.demo-form-full {
  max-width: 100%;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
  margin-bottom: 1rem;
}

.form-group {
  margin-bottom: 1rem;
}

.form-label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.required {
  color: var(--color-error);
}

.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

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

.form-input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.form-input.error,
.form-input[aria-invalid="true"] {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2);
}

.form-hint {
  display: block;
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-top: 0.375rem;
}

.form-error {
  display: block;
  font-size: 0.8125rem;
  color: var(--color-error);
  margin-top: 0.375rem;
  min-height: 1.25rem;
}

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
  width: 20px;
  height: 20px;
  margin-top: 0.125rem;
  accent-color: var(--accent-primary);
}

.checkbox-text {
  color: var(--text-secondary);
}

.form-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

/* Pattern Status */
.pattern-status {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
}

.status-idle {
  color: var(--text-muted);
}

.status-loading {
  color: var(--color-loading);
}

.status-success {
  color: var(--color-success);
}

.status-error {
  color: var(--color-error);
}

/* Dedupe Counter */
.dedupe-counter {
  margin-top: 1rem;
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

.dedupe-counter strong {
  color: var(--accent-primary);
  font-size: 1.25rem;
}

/* Progress Demo Status */
.progress-demo-status {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
}

/* Dialog Result */
.dialog-result {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  min-height: 2.5rem;
}

/* ==========================================================================
   Features Section
   ========================================================================== */

.features-section {
  background: var(--bg-primary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 4rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  transition: all var(--transition-normal);
}

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

.feature-card-new {
  border-color: var(--accent-primary);
  background: linear-gradient(135deg, var(--bg-card), rgba(99, 102, 241, 0.05));
}

.feature-card-new::before {
  content: 'NEW';
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  background: var(--accent-gradient);
  color: white;
  font-size: 0.5625rem;
  font-weight: 700;
  padding: 0.125rem 0.375rem;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.feature-card-new {
  position: relative;
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.feature-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.feature-description {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

/* Semantics Table */
.semantics-table-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
}

.table-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.table-subtitle {
  color: var(--text-muted);
  font-size: 0.9375rem;
  margin-bottom: 1.5rem;
}

.table-scroll {
  overflow-x: auto;
}

.semantics-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.semantics-table th,
.semantics-table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.semantics-table th {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.semantics-table tbody tr:last-child td {
  border-bottom: none;
}

.type-badge {
  display: inline-block;
  padding: 0.25rem 0.625rem;
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: 0.8125rem;
}

.type-success { background: var(--color-success-bg); color: var(--color-success); }
.type-error { background: var(--color-error-bg); color: var(--color-error); }
.type-warning { background: var(--color-warning-bg); color: var(--color-warning); }
.type-info { background: var(--color-info-bg); color: var(--color-info); }
.type-loading { background: var(--color-loading-bg); color: var(--color-loading); }

.badge {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 500;
}

.badge-yes { background: var(--color-success-bg); color: var(--color-success); }
.badge-no { background: var(--bg-tertiary); color: var(--text-muted); }

/* ==========================================================================
   Frameworks Section
   ========================================================================== */

.frameworks-section {
  background: var(--bg-secondary);
}

.framework-tabs {
  max-width: 800px;
  margin: 0 auto;
}

.tabs-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  justify-content: center;
}

.tab-btn {
  padding: 0.75rem 1.5rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tab-btn:hover {
  background: var(--bg-elevated);
  color: var(--text-primary);
}

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

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

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

.install-hint {
  margin-top: 1rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  text-align: center;
}

/* Code Cards */
.code-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-color);
}

.code-title {
  font-weight: 500;
  font-size: 0.875rem;
}

.code-block {
  padding: 1rem;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.7;
  overflow-x: auto;
}

.code-keyword { color: #c678dd; }
.code-string { color: #98c379; }
.code-function { color: #61afef; }
.code-property { color: #e5c07b; }
.code-number { color: #d19a66; }
.code-comment { color: #5c6370; font-style: italic; }
.code-tag { color: #e06c75; }

/* ==========================================================================
   Playground Section
   ========================================================================== */

.playground-section {
  background: var(--bg-primary);
}

.playground-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

@media (max-width: 900px) {
  .playground-container {
    grid-template-columns: 1fr;
  }
}

.playground-editor,
.playground-output {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.playground-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-color);
}

.playground-title {
  font-weight: 500;
  font-size: 0.875rem;
}

.playground-textarea {
  width: 100%;
  min-height: 300px;
  padding: 1rem;
  background: var(--bg-card);
  border: none;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  resize: vertical;
}

.playground-textarea:focus {
  outline: none;
}

.playground-log {
  padding: 1rem;
  min-height: 300px;
  max-height: 400px;
  overflow-y: auto;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

.playground-examples {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
}

.examples-label {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.example-btn {
  padding: 0.5rem 1rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.example-btn:hover {
  background: var(--bg-elevated);
  color: var(--text-primary);
}

/* ==========================================================================
   CTA Section
   ========================================================================== */

.cta-section {
  background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
  text-align: center;
}

.cta-content {
  max-width: 600px;
  margin: 0 auto;
}

.cta-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.cta-description {
  color: var(--text-secondary);
  font-size: 1.125rem;
  margin-bottom: 2rem;
}

.cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  padding: 3rem 0;
}

.footer-content {
  text-align: center;
}

.footer-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
}

.footer-tagline {
  color: var(--text-muted);
  font-size: 0.9375rem;
  margin-bottom: 1.5rem;
}

.footer-links {
  display: flex;
  gap: 2rem;
  justify-content: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

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

.footer-license {
  color: var(--text-muted);
  font-size: 0.8125rem;
}

/* ==========================================================================
   Log Styles (from original)
   ========================================================================== */

.log-entry {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border-color);
}

.log-entry:last-child {
  border-bottom: none;
}

.log-entry-success { color: var(--color-success); }
.log-entry-error { color: var(--color-error); }
.log-entry-warning { color: var(--color-warning); }
.log-entry-info { color: var(--color-info); }
.log-entry-loading { color: var(--color-loading); }

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 768px) {
  :root {
    --section-padding: 3rem;
  }
  
  .hero {
    padding: 6rem 0 3rem;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .install-box {
    flex-direction: column;
    width: 100%;
    max-width: 100%;
  }
  
  .install-code {
    font-size: 0.8125rem;
  }
  
  .section-title {
    font-size: 1.75rem;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-stats {
    gap: 2rem;
  }
  
  .sr-panel-header {
    flex-wrap: wrap;
  }
  
  .sr-panel-clear {
    margin-left: auto;
  }
}