@import url('https://fonts.googleapis.com/css2?family=Crimson+Pro:wght@400;500;600;700&family=Source+Sans+3:wght@400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --color-bg: #09090b;
  --color-surface: #18181b;
  --color-surface-raised: #27272a;
  --color-border: #3f3f46;
  --color-border-subtle: #27272a;
  --color-text: #fafafa;
  --color-text-secondary: #a1a1aa;
  --color-text-muted: #71717a;
  --color-accent: #3b82f6;
  --color-accent-hover: #60a5fa;
  --color-accent-subtle: rgba(59, 130, 246, 0.15);
  --color-accent-glow: rgba(59, 130, 246, 0.4);
  --color-success: #10b981;
  --color-success-subtle: rgba(16, 185, 129, 0.15);
  --color-blue: #3b82f6;
  --color-blue-light: #60a5fa;
  --color-green: #10b981;
  --color-green-light: #34d399;
  --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #10b981 100%);
  --gradient-surface: linear-gradient(180deg, rgba(16, 185, 129, 0.06) 0%, transparent 100%);
  --gradient-glow: radial-gradient(ellipse at center, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
  --font-heading: 'Crimson Pro', Georgia, serif;
  --font-body: 'Source Sans 3', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 20px;
  --shadow-glow: 0 0 40px var(--color-accent-glow);
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
  --color-bg: #fafafa;
  --color-surface: #ffffff;
  --color-surface-raised: #f4f4f5;
  --color-border: #e4e4e7;
  --color-border-subtle: #f4f4f5;
  --color-text: #18181b;
  --color-text-secondary: #52525b;
  --color-text-muted: #a1a1aa;
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-accent-subtle: rgba(37, 99, 235, 0.1);
  --color-accent-glow: rgba(37, 99, 235, 0.2);
  --color-success: #059669;
  --color-success-subtle: rgba(5, 150, 105, 0.1);
  --gradient-surface: linear-gradient(180deg, rgba(37, 99, 235, 0.05) 0%, transparent 100%);
  --gradient-glow: radial-gradient(ellipse at center, rgba(37, 99, 235, 0.1) 0%, transparent 70%);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Particles Background */
.particles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 2px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 50%;
  opacity: 0.3;
  animation: float-particle 20s infinite linear;
}

@keyframes float-particle {
  0% {
    transform: translateY(100vh) rotate(0deg);
    opacity: 0;
  }
  10% {
    opacity: 0.3;
  }
  90% {
    opacity: 0.3;
  }
  100% {
    transform: translateY(-100vh) rotate(720deg);
    opacity: 0;
  }
}

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

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

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-text);
}

h1 { font-size: 3.5rem; letter-spacing: -0.03em; }
h2 { font-size: 2.25rem; letter-spacing: -0.02em; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
  max-width: 72ch;
  color: var(--color-text-secondary);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* Skip Link */
.skip-link {
  position: absolute;
  top: -50px;
  left: 16px;
  background: var(--color-accent);
  color: #fff;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  z-index: 1000;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 16px;
}

/* Theme Toggle */
.toggle-theme {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  cursor: pointer;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  transition: all var(--transition-smooth);
  backdrop-filter: blur(10px);
}

.toggle-theme:hover {
  background: var(--color-surface-raised);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-glow);
}

.theme-icon,
.theme-icon-dark {
  line-height: 1;
}

/* Hero Section */
.hero {
  position: relative;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 6rem clamp(2rem, 5vw, 8rem) 5rem;
  overflow: hidden;
  z-index: 1;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(139, 92, 246, 0.2) 0%, transparent 50%),
    var(--gradient-glow);
  pointer-events: none;
}

.hero-bg-pattern {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(rgba(139, 92, 246, 0.1) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.5;
}

.hero-content {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  z-index: 1;
}

.hero-badge {
  display: inline-block;
  padding: 0.5rem 1.25rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  background: var(--color-accent-subtle);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: 50px;
  margin-bottom: 2rem;
  animation: fadeInDown 0.6s ease-out;
}

.hero-title {
  margin-bottom: 1.5rem;
  animation: fadeInUp 0.8s ease-out 0.1s backwards;
}

.title-line {
  display: block;
}

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

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  margin-bottom: 2.5rem;
  line-height: 1.7;
  animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  padding: 2rem 0;
  margin-bottom: 2rem;
  animation: fadeInUp 0.8s ease-out 0.3s backwards;
}

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

.stat-number {
  display: block;
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: transform var(--transition-smooth);
}

.stat-number:hover {
  transform: scale(1.1);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
  font-weight: 500;
  border-radius: var(--radius-lg);
  border: 1px solid transparent;
  transition: all var(--transition-smooth);
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 20px rgba(139, 92, 246, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(139, 92, 246, 0.4);
}

.btn-primary svg {
  width: 18px;
  height: 18px;
  transition: transform var(--transition-fast);
}

.btn-primary:hover svg {
  transform: translateX(4px);
}

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

.btn-ghost:hover {
  background: var(--color-surface-raised);
  color: var(--color-text);
  border-color: var(--color-accent);
}

.btn-secondary {
  background: var(--color-surface-raised);
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-border);
}

/* Quick Nav */
.quick-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(9, 9, 11, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  padding: 0 clamp(2rem, 5vw, 8rem);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: 1rem 0;
}

.nav-sections {
  display: flex;
  gap: 0.5rem;
}

.nav-btn {
  padding: 0.625rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.nav-btn:hover {
  background: var(--color-surface-raised);
  color: var(--color-text);
}

.nav-btn.active {
  background: var(--color-accent-subtle);
  color: var(--color-accent);
}

.nav-search {
  display: flex;
  align-items: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0 0.5rem;
  transition: border-color var(--transition-fast);
}

.nav-search:focus-within {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

.search-input {
  border: none;
  background: transparent;
  color: var(--color-text);
  padding: 0.625rem 0.875rem;
  font-size: 0.9rem;
  width: 220px;
  outline: none;
}

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

.search-btn {
  padding: 0.5rem;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
}

.search-btn:hover {
  color: var(--color-accent);
}

.search-btn svg {
  width: 18px;
  height: 18px;
}

/* Featured Techniques */
.featured-techniques {
  position: relative;
  padding: 5rem clamp(2rem, 5vw, 8rem);
  max-width: 1200px;
  margin: 0 auto;
  z-index: 1;
}

.featured-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.featured-header h2 {
  margin-bottom: 0.75rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.featured-header p {
  color: var(--color-text-muted);
}

.techniques-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.hero-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.hero-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-smooth);
}

.hero-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

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

.hero-card h3 {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.hero-card h3 .icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--color-accent-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
}

.hero-card h3 .icon svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
}

.hero-card p {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  margin-bottom: 1rem;
}

.hero-card .meta {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.hero-card .btn-link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  margin-top: 1rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-accent);
}

.hero-card .btn-link svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast);
}

.hero-card .btn-link:hover svg {
  transform: translateX(4px);
}

/* Quick Access Section */
.quick-access {
  padding: 3rem clamp(2rem, 5vw, 8rem);
  background: var(--gradient-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.quick-access-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  max-width: 1200px;
  margin: 0 auto;
}

.quick-card {
  display: block;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: all var(--transition-smooth);
}

.quick-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.quick-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--color-accent-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  color: var(--color-accent);
}

.quick-icon svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
  stroke-width: 1.5;
  fill: none;
}

.quick-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.quick-card p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin: 0;
}

/* Menu Handle (Mobile) */
.menu-handle {
  display: none;
  position: fixed;
  top: 1rem;
  left: 1rem;
  padding: 0.625rem 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  z-index: 100;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Layout */
.layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 2rem;
  padding: 2rem clamp(2rem, 5vw, 8rem);
  max-width: 1400px;
  margin: 0 auto;
  min-height: calc(100vh - 400px);
  position: relative;
  z-index: 1;
}

/* Sidebar */
.sidebar {
  position: sticky;
  top: 6rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  height: fit-content;
  max-height: calc(100vh - 8rem);
  overflow-y: auto;
}

.sidebar-head {
  padding-bottom: 1rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--color-border-subtle);
}

.sidebar-head h2 {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
  margin: 0;
}

.menu {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.menu-section {
  margin-bottom: 0.5rem;
}

.menu-section-header {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.625rem 0.875rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.menu-section-header:hover {
  background: var(--color-surface-raised);
  color: var(--color-text);
}

.menu-section-header .icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.menu-section-header svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
}

.menu-section-header::after {
  content: '';
  margin-left: auto;
  width: 8px;
  height: 8px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(-45deg);
  transition: transform var(--transition-fast);
}

.menu-section[aria-expanded="true"] .menu-section-header::after {
  transform: rotate(45deg);
}

.menu-sublist {
  list-style: none;
  margin: 0.25rem 0 0 0.5rem;
  padding: 0 0 0 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
}

.menu-sublist button {
  display: block;
  width: 100%;
  padding: 0.5rem 0.875rem;
  text-align: left;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.menu-sublist button:hover {
  background: var(--color-surface-raised);
  color: var(--color-text);
}

.menu-sublist button.active {
  background: var(--color-accent-subtle);
  color: var(--color-accent);
  font-weight: 500;
}

.sidebar-footer {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border-subtle);
}

.sidebar-footer p {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin: 0;
}

.sidebar-footer kbd {
  display: inline-block;
  padding: 0.125rem 0.375rem;
  font-size: 0.7rem;
  font-family: var(--font-mono);
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: 3px;
}

/* Main Content */
.main {
  min-width: 0;
}

.breadcrumbs {
  margin-bottom: 1.5rem;
}

.breadcrumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.875rem;
}

.breadcrumbs li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text-muted);
}

.breadcrumbs li:not(:last-child)::after {
  content: '/';
  color: var(--color-border);
}

.breadcrumbs .link-button {
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  color: var(--color-text-secondary);
  cursor: pointer;
}

.breadcrumbs .link-button:hover {
  color: var(--color-accent);
}

.content {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 2rem;
  min-height: 400px;
}

/* Empty State */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 2rem;
  min-height: 400px;
}

.empty-icon {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-xl);
  background: var(--color-accent-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  color: var(--color-accent);
}

.empty-icon svg {
  width: 40px;
  height: 40px;
  stroke: currentColor;
  stroke-width: 1;
  fill: none;
}

.empty-state h2 {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
}

.empty-state p {
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

/* Technique View */
.technique-header {
  border-bottom: 1px solid var(--color-border-subtle);
  padding-bottom: 1.25rem;
  margin-bottom: 1.5rem;
}

.technique-header h2 {
  margin-bottom: 0.5rem;
}

.technique-header > p {
  color: var(--color-text-secondary);
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.625rem;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-muted);
  background: var(--color-surface-raised);
  border-radius: var(--radius-sm);
  margin-right: 0.5rem;
}

.technique-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.technique-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 2rem;
}

.technique-main h3 {
  margin-top: 1.75rem;
  margin-bottom: 0.75rem;
  font-size: 1.15rem;
}

.technique-main h3:first-child {
  margin-top: 0;
}

.step-list, .error-list, .practice-list {
  padding-left: 1.25rem;
  margin-bottom: 1.5rem;
}

.step-list li, .error-list li, .practice-list li {
  margin-bottom: 0.5rem;
  color: var(--color-text-secondary);
}

.block-expandable {
  margin: 1.5rem 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.block-expandable summary {
  padding: 0.875rem 1rem;
  font-weight: 500;
  font-size: 0.95rem;
  cursor: pointer;
  background: var(--color-surface-raised);
  list-style: none;
}

.block-expandable[open] summary {
  border-bottom: 1px solid var(--color-border);
}

.block-expandable > div {
  padding: 1rem;
}

.copy-wrapper {
  margin-top: 0.75rem;
}

.copy-area {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

.copy-btn {
  margin-top: 0.5rem;
  padding: 0.375rem 0.875rem;
  font-size: 0.8rem;
  font-weight: 500;
  background: var(--color-accent);
  border: none;
  border-radius: var(--radius-sm);
  color: #fff;
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

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

.technique-aside {
  position: sticky;
  top: 6rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.aside-card {
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.aside-card h3 {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
}

.resource-list, .notes-list {
  list-style: none;
  font-size: 0.875rem;
}

.resource-list li, .notes-list li {
  margin-bottom: 0.5rem;
}

.resource-list a {
  color: var(--color-accent);
}

.resource-list small {
  display: block;
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

.related-list {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.related-list button {
  width: 100%;
  text-align: left;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.related-list button:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.nav-buttons {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border-subtle);
}

/* Reader Toggle */
.reader-toggle {
  position: fixed;
  bottom: 1.5rem;
  left: 1.5rem;
  padding: 0.625rem 1.125rem;
  font-size: 0.85rem;
  font-weight: 500;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  z-index: 25;
  transition: all var(--transition-fast);
}

.reader-toggle:hover {
  background: var(--color-surface-raised);
  color: var(--color-text);
}

.reader-mode .sidebar {
  display: none;
}

.reader-mode .layout {
  grid-template-columns: 1fr;
}

/* Feedback Section */
.feedback {
  background: var(--gradient-surface);
  border-top: 1px solid var(--color-border);
  padding: 4rem clamp(2rem, 5vw, 8rem);
}

.feedback h2 {
  text-align: center;
  margin-bottom: 2rem;
}

.feedback-form {
  max-width: 600px;
  margin: 0 auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 2rem;
}

.feedback-form fieldset {
  border: none;
  margin: 0 0 1.25rem 0;
  padding: 0;
}

.feedback-form legend {
  font-weight: 500;
  margin-bottom: 0.75rem;
}

.feedback-options {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 1rem;
}

.feedback-options label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  color: var(--color-text-secondary);
}

.feedback-options input[type="radio"] {
  accent-color: var(--color-accent);
}

.feedback-notes {
  display: block;
  margin-bottom: 1.25rem;
}

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

.feedback-notes textarea {
  width: 100%;
  padding: 0.875rem;
  font-family: inherit;
  font-size: 0.95rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  color: var(--color-text);
  resize: vertical;
  transition: border-color var(--transition-fast);
}

.feedback-notes textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

/* Footer */
.footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 2rem clamp(2rem, 5vw, 8rem);
  text-align: center;
}

.footer p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin: 0;
}

/* Animations */
@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Responsive */
@media (max-width: 1024px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 320px;
    max-width: 85vw;
    border-radius: 0;
    border-right: 1px solid var(--color-border);
    transform: translateX(-100%);
    transition: transform var(--transition-smooth);
    z-index: 100;
    overflow-y: auto;
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .menu-handle {
    display: flex;
  }

  .nav-sections {
    display: none;
  }

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

  .technique-aside {
    position: static;
  }
}

@media (max-width: 768px) {
  .hero {
    padding: 4rem 1.5rem 3rem;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-stats {
    flex-direction: column;
    gap: 1.5rem;
  }

  .nav-container {
    flex-direction: column;
    gap: 1rem;
  }

  .nav-search {
    width: 100%;
  }

  .search-input {
    width: 100%;
  }

  .featured-techniques,
  .quick-access {
    padding: 3rem 1.5rem;
  }

  .layout {
    padding: 1.5rem;
  }

  .content {
    padding: 1.5rem;
  }

  .quick-access-grid {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}