/* ===================================================================
   CSS Custom Properties (Design Tokens)
   =================================================================== */

:root {
  /* Color Palette - Light Mode */
  --color-primary: #dc2626;
  --color-primary-hover: #b91c1c;
  --color-primary-light: #fef2f2;
  --color-primary-lighter: #fee2e2;
  --color-secondary: #64748b;
  --color-accent: #ef4444;
  --color-warning: #f59e0b;

  /* Neutral Colors - Light Mode */
  --color-background: #ffffff;
  --color-surface: #f8fafc;
  --color-surface-elevated: #ffffff;
  --color-border: #e2e8f0;
  --color-border-strong: #cbd5e1;
  --color-text-primary: #0f172a;
  --color-text-secondary: #475569;
  --color-text-tertiary: #64748b;

  /* Semantic Colors */
  --color-success: #10b981;
  --color-error: #dc2626;
  --color-info: #64748b;

  /* Code/Terminal Colors */
  --color-code-bg: #f8fafc;
  --color-code-text: #1e293b;
  --color-code-border: #cbd5e1;

  /* Gradient Colors */
  --gradient-primary: linear-gradient(135deg, #dc2626 0%, #991b1b 100%);
  --gradient-accent: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  --gradient-hero: linear-gradient(135deg, #dc2626 0%, #7f1d1d 100%);
  --gradient-surface: linear-gradient(to bottom, #ffffff 0%, #f8fafc 100%);

  /* Typography */
  --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-family-mono: 'Consolas', 'Monaco', 'Courier New', monospace;

  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-lg: 1.125rem;   /* 18px */
  --font-size-xl: 1.25rem;    /* 20px */
  --font-size-2xl: 1.5rem;    /* 24px */
  --font-size-3xl: 1.875rem;  /* 30px */
  --font-size-4xl: 2.25rem;   /* 36px */

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Spacing */
  --space-xs: 0.25rem;   /* 4px */
  --space-sm: 0.5rem;    /* 8px */
  --space-md: 1rem;      /* 16px */
  --space-lg: 1.5rem;    /* 24px */
  --space-xl: 2rem;      /* 32px */
  --space-2xl: 3rem;     /* 48px */
  --space-3xl: 4rem;     /* 64px */

  /* Border Radius */
  --radius-sm: 0.25rem;  /* 4px */
  --radius-md: 0.5rem;   /* 8px */
  --radius-lg: 0.75rem;  /* 12px */
  --radius-xl: 1rem;     /* 16px */

  /* 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);

  /* Layout */
  --container-max-width: 1200px;
  --header-height: 80px;

  /* 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);
}

/* Dark Mode Colors */
[data-theme="dark"] {
  --color-primary: #ef4444;
  --color-primary-hover: #f87171;
  --color-primary-light: #450a0a;
  --color-primary-lighter: #7f1d1d;
  --color-secondary: #9ca3af;

  --color-background: #0a0a0a;
  --color-surface: #1a1a1a;
  --color-surface-elevated: #262626;
  --color-border: #404040;
  --color-border-strong: #525252;
  --color-text-primary: #fafafa;
  --color-text-secondary: #d4d4d4;
  --color-text-tertiary: #a3a3a3;

  --color-code-bg: #171717;
  --color-code-text: #e5e5e5;
  --color-code-border: #404040;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.2);

  /* Gradient Colors - Dark Mode */
  --gradient-primary: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  --gradient-accent: linear-gradient(135deg, #f87171 0%, #ef4444 100%);
  --gradient-hero: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  --gradient-surface: linear-gradient(to bottom, #1a1a1a 0%, #0a0a0a 100%);
}

/* ===================================================================
   Base Styles
   =================================================================== */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background: var(--gradient-surface);
  background-attachment: fixed;
  transition: background-color var(--transition-base), color var(--transition-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--space-md) 0;
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text-primary);
}

h1 {
  font-size: var(--font-size-4xl);
}

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

h3 {
  font-size: var(--font-size-xl);
}

p {
  margin: 0 0 var(--space-md) 0;
}

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

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

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

code {
  font-family: var(--font-family-mono);
  font-size: 0.9em;
}

strong {
  font-weight: var(--font-weight-semibold);
}

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

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* ===================================================================
   Header
   =================================================================== */

.site-header {
  background: rgba(255, 255, 255, 0.8);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-lg) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  transition: all var(--transition-base);
}

[data-theme="dark"] .site-header {
  background: rgba(26, 26, 26, 0.8);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-lg);
}

.logo-section {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.logo-icon {
  font-size: 2.5rem;
  line-height: 1;
}

.logo-text h1 {
  font-size: var(--font-size-2xl);
  margin: 0;
  line-height: var(--line-height-tight);
}

.logo-text .subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin: var(--space-xs) 0 0 0;
  font-weight: var(--font-weight-normal);
}

/* Theme Toggle Button */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 2px solid var(--color-border);
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 1.5rem;
}

.theme-toggle:hover {
  background: var(--gradient-primary);
  border-color: var(--color-primary);
  transform: scale(1.1) rotate(10deg);
  box-shadow: 0 4px 12px rgba(220, 38, 38, 0.3);
}

.theme-toggle:hover .theme-icon {
  filter: grayscale(0) brightness(2);
}

.theme-toggle:active {
  transform: scale(0.95);
}

.theme-toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ===================================================================
   Main Content
   =================================================================== */

.main-content {
  padding: var(--space-3xl) 0;
  min-height: calc(100vh - var(--header-height) - 120px);
}

.section {
  margin-bottom: var(--space-3xl);
}

.section-intro {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
}

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

.hero {
  text-align: center;
  padding: var(--space-2xl) 0;
  margin-bottom: var(--space-3xl);
}

.hero h2 {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--space-lg);
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.hero-description {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 800px;
  margin: 0 auto var(--space-xl) auto;
  line-height: var(--line-height-relaxed);
}

.hero-badges {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-xl);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  border: 1px solid;
}

.badge-community {
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary-lighter) 100%);
  color: var(--color-primary);
  border-color: var(--color-primary);
  font-weight: 600;
}

.badge-opensource {
  background-color: rgba(16, 185, 129, 0.1);
  color: var(--color-success);
  border-color: var(--color-success);
}

.badge-independent {
  background-color: rgba(245, 158, 11, 0.1);
  color: var(--color-warning);
  border-color: var(--color-warning);
}

/* ===================================================================
   Package Feeds Section
   =================================================================== */

.feeds-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-xl);
}

.feed-card {
  background: var(--color-surface-elevated);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.feed-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.feed-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 10px 40px rgba(220, 38, 38, 0.15);
  transform: translateY(-4px);
}

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

.feed-header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.feed-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.feed-icon.stable {
  background-color: rgba(16, 185, 129, 0.15);
  color: var(--color-success);
}

.feed-icon.testing {
  background-color: rgba(245, 158, 11, 0.15);
  color: var(--color-warning);
}

.feed-header h3 {
  margin: 0 0 var(--space-xs) 0;
  font-size: var(--font-size-xl);
}

.feed-description {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin: 0;
}

/* URL Copy Box */
.url-copy-box {
  display: flex;
  gap: var(--space-sm);
  background-color: var(--color-code-bg);
  border: 1px solid var(--color-code-border);
  border-radius: var(--radius-md);
  padding: var(--space-sm);
}

.feed-url {
  flex: 1;
  font-family: var(--font-family-mono);
  font-size: var(--font-size-sm);
  color: var(--color-code-text);
  word-break: break-all;
  padding: var(--space-sm);
  line-height: var(--line-height-normal);
}

/* ===================================================================
   Copy Button
   =================================================================== */

.copy-btn {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  background: var(--gradient-primary);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(220, 38, 38, 0.3);
}

.copy-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(220, 38, 38, 0.4);
  filter: brightness(1.1);
}

.copy-btn:active {
  transform: translateY(0);
}

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

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

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

/* ===================================================================
   Setup Instructions
   =================================================================== */

.instruction-step {
  display: flex;
  gap: var(--space-lg);
  margin-bottom: var(--space-2xl);
  align-items: flex-start;
}

.step-number {
  width: 56px;
  height: 56px;
  background: var(--gradient-primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xl);
  font-weight: 800;
  flex-shrink: 0;
  box-shadow: 0 4px 16px rgba(220, 38, 38, 0.35);
  position: relative;
}

.step-number::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: var(--gradient-primary);
  opacity: 0.3;
  filter: blur(8px);
  z-index: -1;
}

.step-content {
  flex: 1;
}

.step-content h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-md);
}

.step-content > p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
  line-height: var(--line-height-relaxed);
}

/* Warning Box */
.warning-box {
  background-color: rgba(245, 158, 11, 0.08);
  border: 2px solid var(--color-warning);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin: var(--space-lg) 0;
}

.warning-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  color: var(--color-warning);
  font-size: var(--font-size-lg);
}

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

.warning-box p {
  color: var(--color-text-primary);
  margin-bottom: var(--space-md);
}

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

.warning-note {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  font-style: italic;
}

/* Command Box */
.command-box {
  display: flex;
  gap: var(--space-sm);
  background-color: var(--color-code-bg);
  border: 1px solid var(--color-code-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  margin: var(--space-lg) 0;
}

.command {
  flex: 1;
  font-family: var(--font-family-mono);
  font-size: var(--font-size-sm);
  color: var(--color-code-text);
  word-break: break-all;
  line-height: var(--line-height-relaxed);
}

.command-group {
  margin-bottom: var(--space-lg);
}

.command-label {
  display: block;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-sm);
}

/* Method Tabs */
.method-tabs {
  display: flex;
  gap: var(--space-sm);
  margin: var(--space-xl) 0 var(--space-lg) 0;
  border-bottom: 2px solid var(--color-border);
}

.method-tab {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  background: transparent;
  border: none;
  border-bottom: 3px solid transparent;
  cursor: pointer;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  margin-bottom: -2px;
}

.method-tab:hover {
  color: var(--color-text-primary);
  background-color: var(--color-surface);
}

.method-tab.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.method-tab:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: -2px;
}

.tab-icon {
  font-size: 1.25rem;
}

/* Method Content */
.method-content {
  display: none;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin-top: var(--space-lg);
}

.method-content.active {
  display: block;
  animation: fadeIn var(--transition-base);
}

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

.method-intro {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
}

.method-single {
  display: none;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin-top: var(--space-lg);
}


/* GUI Steps */
.gui-steps {
  margin: 0;
  padding-left: var(--space-xl);
  color: var(--color-text-primary);
}

.gui-steps li {
  margin-bottom: var(--space-md);
  line-height: var(--line-height-relaxed);
  padding-left: var(--space-sm);
}

.gui-steps li:last-child {
  margin-bottom: 0;
}

.gui-steps ul {
  margin-top: var(--space-sm);
  padding-left: var(--space-xl);
}

.gui-steps ul li {
  margin-bottom: var(--space-sm);
}

/* ===================================================================
   Community Section
   =================================================================== */

.community-section {
  background: var(--color-surface-elevated);
  border-radius: var(--radius-xl);
  padding: var(--space-3xl) var(--space-xl);
  margin-top: var(--space-3xl);
  border: 2px solid var(--color-border);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
}

.community-section h2 {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.community-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
}

.community-card {
  background: var(--color-background);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all var(--transition-base);
  position: relative;
}

.community-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-base);
  z-index: -1;
}

.community-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 8px 30px rgba(220, 38, 38, 0.15);
  transform: translateY(-4px);
}

.community-card:hover::after {
  opacity: 0.05;
}

.community-icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
}

.community-card h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-md);
}

.community-card p {
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: 0;
}

/* GitHub Link Box */
.github-link-box {
  background-color: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
}

.github-link-box p {
  margin-bottom: var(--space-md);
  color: var(--color-text-primary);
}

.github-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  background: var(--gradient-primary);
  color: white;
  border-radius: var(--radius-lg);
  font-size: var(--font-size-lg);
  font-weight: 600;
  transition: all var(--transition-base);
  text-decoration: none;
  box-shadow: 0 4px 16px rgba(220, 38, 38, 0.3);
}

.github-link:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(220, 38, 38, 0.4);
  filter: brightness(1.1);
  color: white;
}

.github-icon svg {
  display: block;
}

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

/* ===================================================================
   Legal Section
   =================================================================== */

.legal-section {
  margin-top: var(--space-3xl);
}

.disclaimer-box {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
}

.disclaimer-box p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-md);
}

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

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

.site-footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-2xl) 0;
  margin-top: var(--space-3xl);
  text-align: center;
}

.site-footer p {
  margin: var(--space-sm) 0;
  color: var(--color-text-secondary);
}

.footer-note {
  font-size: var(--font-size-sm);
  font-style: italic;
}

/* ===================================================================
   Toast Notification
   =================================================================== */

.toast {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  background-color: var(--color-success);
  color: white;
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: var(--font-weight-medium);
  opacity: 0;
  transform: translateY(100px);
  transition: all var(--transition-base);
  pointer-events: none;
  z-index: 1000;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.toast-icon {
  font-size: 1.25rem;
}

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

/* Tablet */
@media (max-width: 768px) {
  :root {
    --space-3xl: 3rem;
    --space-2xl: 2rem;
  }

  .container {
    padding: 0 var(--space-md);
  }

  .logo-text h1 {
    font-size: var(--font-size-xl);
  }

  .logo-text .subtitle {
    font-size: var(--font-size-xs);
  }

  .hero h2 {
    font-size: var(--font-size-3xl);
  }

  .hero-description {
    font-size: var(--font-size-base);
  }

  .feeds-grid {
    grid-template-columns: 1fr;
  }

  .instruction-step {
    flex-direction: column;
    gap: var(--space-md);
  }

  .method-tabs {
    flex-direction: column;
    border-bottom: none;
  }

  .method-tab {
    border-bottom: 1px solid var(--color-border);
    border-left: 3px solid transparent;
    margin-bottom: 0;
  }

  .method-tab.active {
    border-bottom-color: var(--color-border);
    border-left-color: var(--color-primary);
  }

  .community-grid {
    grid-template-columns: 1fr;
  }

  .community-section {
    padding: var(--space-2xl) var(--space-md);
  }
}

/* Mobile */
@media (max-width: 480px) {
  .logo-icon {
    font-size: 2rem;
  }

  .hero {
    padding: var(--space-xl) 0;
  }

  .hero h2 {
    font-size: var(--font-size-2xl);
  }

  .hero-badges {
    flex-direction: column;
    align-items: center;
  }

  .badge {
    width: 100%;
    justify-content: center;
  }

  .url-copy-box {
    flex-direction: column;
  }

  .copy-btn {
    width: 100%;
    justify-content: center;
  }

  .command-box {
    flex-direction: column;
  }

  .feed-url,
  .command {
    font-size: var(--font-size-xs);
  }

  .toast {
    left: var(--space-md);
    right: var(--space-md);
    bottom: var(--space-md);
  }

  h2 {
    font-size: var(--font-size-2xl);
  }

  h3 {
    font-size: var(--font-size-lg);
  }

  .step-content h3 {
    font-size: var(--font-size-xl);
  }
}

/* ===================================================================
   Print Styles
   =================================================================== */

@media print {
  .theme-toggle,
  .copy-btn,
  .toast {
    display: none;
  }

  body {
    background-color: white;
    color: black;
  }

  .site-header {
    position: static;
    border-bottom: 2px solid black;
  }

  a {
    color: black;
    text-decoration: underline;
  }

  .feed-card,
  .community-card,
  .warning-box,
  .command-box,
  .disclaimer-box {
    border: 2px solid black;
  }
}

/* ===================================================================
   Accessibility
   =================================================================== */

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

/* Reduce motion for users who prefer it */
@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;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --color-border: #000;
    --color-border-strong: #000;
  }

  [data-theme="dark"] {
    --color-border: #fff;
    --color-border-strong: #fff;
  }

  .feed-card,
  .community-card,
  .warning-box {
    border-width: 2px;
  }
}