/* ==========================================================================
   Agent Data Pod — Design System
   Version: 0.2.0
   ========================================================================== */

/* ==========================================================================
   CSS Custom Properties
   ========================================================================== */

:root {
  /* Typography */
  --font-sans: 'IBM Plex Sans', -apple-system, blinkmacsystemfont, 'Segoe UI', roboto, sans-serif;
  --font-mono: 'IBM Plex Mono', 'SF Mono', consolas, monospace;

  /* Type Scale - Accessible sizing (min 16px for body) */
  --text-xs: 0.8125rem;   /* 13px - only for badges/labels */
  --text-sm: 0.9375rem;   /* 15px */
  --text-base: 1.0625rem; /* 17px */
  --text-lg: 1.1875rem;   /* 19px */
  --text-xl: 1.375rem;    /* 22px */
  --text-2xl: 1.625rem;   /* 26px */
  --text-3xl: 2.125rem;   /* 34px */
  --text-4xl: 2.75rem;    /* 44px */

  /* 8px Grid Spacing */
  --space-1: 0.25rem;     /* 4px */
  --space-2: 0.5rem;      /* 8px */
  --space-3: 0.75rem;     /* 12px */
  --space-4: 1rem;        /* 16px */
  --space-5: 1.5rem;      /* 24px */
  --space-6: 2rem;        /* 32px */
  --space-8: 3rem;        /* 48px */
  --space-10: 4rem;       /* 64px */

  /* Fibonacci Timing */
  --dur-89: 89ms;
  --dur-144: 144ms;
  --dur-233: 233ms;
  --dur-377: 377ms;
  --dur-610: 610ms;

  /* Light Theme Colors */
  --bg: #FAFAF9;
  --bg-elevated: #FFF;
  --bg-code: #F5F5F4;
  --text: #1C1917;
  --text-secondary: #57534E;
  --text-tertiary: #737373;
  --accent: #0D9488;
  --accent-hover: #0F766E;
  --accent-subtle: #CCFBF1;
  --border: #E7E5E4;
  --border-strong: #D6D3D1;
  --success: #16A34A;
  --error: #DC2626;

  /* Layout */
  --max-width: 52rem;
  --content-width: 65ch;
}

/* Dark Theme */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0C0A09;
    --bg-elevated: #1C1917;
    --bg-code: #292524;
    --text: #FAFAF9;
    --text-secondary: #A8A29E;
    --text-tertiary: #78716C;
    --accent: #2DD4BF;
    --accent-hover: #5EEAD4;
    --accent-subtle: rgb(45 212 191 / 15%);
    --border: #292524;
    --border-strong: #44403C;
  }
}

/* Manual Theme Override */
[data-theme="light"] {
  --bg: #FAFAF9;
  --bg-elevated: #FFF;
  --bg-code: #F5F5F4;
  --text: #1C1917;
  --text-secondary: #57534E;
  --text-tertiary: #737373;
  --accent: #0D9488;
  --accent-hover: #0F766E;
  --accent-subtle: #CCFBF1;
  --border: #E7E5E4;
  --border-strong: #D6D3D1;
}

[data-theme="dark"] {
  --bg: #0C0A09;
  --bg-elevated: #1C1917;
  --bg-code: #292524;
  --text: #FAFAF9;
  --text-secondary: #A8A29E;
  --text-tertiary: #78716C;
  --accent: #2DD4BF;
  --accent-hover: #5EEAD4;
  --accent-subtle: rgb(45 212 191 / 15%);
  --border: #292524;
  --border-strong: #44403C;
}

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

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

/* Increase base size on larger screens */
@media (width >= 768px) {
  html {
    font-size: 17px;
  }
}

@media (width >= 1200px) {
  html {
    font-size: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ==========================================================================
   Focus States (Accessibility)
   ========================================================================== */

:focus {
  outline: none;
}

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

a:focus-visible {
  border-radius: 2px;
}

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

.theme-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
  border-radius: 50%;
}

/* ==========================================================================
   Skip Link
   ========================================================================== */

.skip-link {
  position: absolute;
  top: -3rem;
  left: 1rem;
  background: var(--accent);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  z-index: 1000;
  transition: top var(--dur-144);
  text-decoration: none;
  font-weight: 500;
}

.skip-link:focus {
  top: 1rem;
}

/* ==========================================================================
   Progress Bar
   ========================================================================== */

.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), #14B8A6);
  width: 0%;
  z-index: 1001;
  transition: width var(--dur-89) ease-out;
}

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

header {
  position: sticky;
  top: 0;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-3) var(--space-4);
  gap: var(--space-4);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  font-size: var(--text-lg);
}

.nav-brand svg {
  width: 28px;
  height: 28px;
  color: var(--accent);
}

.nav-brand:hover {
  color: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--text-base);
  font-weight: 500;
  padding: var(--space-2) var(--space-3);
  border-radius: 0.5rem;
  transition: color var(--dur-144), background var(--dur-144);
  min-height: 2.5rem;
  display: inline-flex;
  align-items: center;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
  background: var(--accent-subtle);
}

.nav-links a[aria-current="page"] {
  color: var(--accent);
  background: var(--accent-subtle);
}

/* Theme Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 50%;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all var(--dur-144);
}

.theme-toggle:hover {
  color: var(--text);
  border-color: var(--border-strong);
}

.theme-toggle .sun { display: block; }
.theme-toggle .moon { display: none; }

[data-theme="dark"] .theme-toggle .sun { display: none; }
[data-theme="dark"] .theme-toggle .moon { display: block; }

@media (prefers-color-scheme: dark) {
  .theme-toggle .sun { display: none; }
  .theme-toggle .moon { display: block; }
}

[data-theme="light"] .theme-toggle .sun { display: block; }
[data-theme="light"] .theme-toggle .moon { display: none; }

/* Mobile Navigation */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  padding: var(--space-2);
  cursor: pointer;
  color: var(--text);
}

.nav-toggle svg {
  width: 24px;
  height: 24px;
}

@media (width <= 768px) {
  .nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .nav-links {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: var(--space-4);
    gap: var(--space-2);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--dur-233), opacity var(--dur-233), visibility var(--dur-233);
    box-shadow: 0 4px 12px rgb(0 0 0 / 10%);
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-links li {
    width: 100%;
  }

  .nav-links a {
    display: block;
    padding: var(--space-3);
    text-align: center;
    font-size: var(--text-base);
  }

  .nav-links li:has(.theme-toggle) {
    display: flex;
    justify-content: center;
    padding-top: var(--space-2);
    border-top: 1px solid var(--border);
    margin-top: var(--space-2);
  }
}

/* ==========================================================================
   Page Content
   ========================================================================== */

.page-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-6) var(--space-4);
}

.spec-header {
  margin-bottom: var(--space-6);
}

.spec-header h1 {
  font-size: var(--text-3xl);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.025em;
  margin-bottom: var(--space-3);
}

.lead {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  line-height: 1.6;
}

.spec-meta {
  font-size: var(--text-base);
  color: var(--text-secondary);
}

.spec-meta-small {
  font-size: var(--text-base);
}

/* ==========================================================================
   LANDING PAGE STYLES
   ========================================================================== */

/* Hero Section */
.hero {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: var(--space-10);
  align-items: center;
  padding: var(--space-10) var(--space-6);
  max-width: 72rem;
  margin: 0 auto;
  overflow: hidden;
}

@media (width <= 1024px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--space-8);
    padding: var(--space-8) var(--space-4);
  }

  .hero-visual {
    order: -1;
    max-width: 360px;
    margin: 0 auto;
  }
}

.hero-content {
  max-width: 34rem;
}

@media (width <= 1024px) {
  .hero-content {
    max-width: none;
  }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.5rem 1rem;
  background: var(--accent-subtle);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  border-radius: 999px;
  margin-bottom: var(--space-5);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

@media (prefers-reduced-motion: reduce) {
  .badge-dot {
    animation: none;
  }
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-4);
}

.gradient-text {
  background: linear-gradient(135deg, var(--accent) 0%, #14B8A6 50%, #06B6D4 100%);
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent; /* Fallback for browsers that don't support -webkit-text-fill-color */
}

.hero-tagline {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-6);
}

.hero-actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

@media (width <= 900px) {
  .hero-actions {
    justify-content: center;
  }
}

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

/* Architecture Diagram */
.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}

.architecture-diagram {
  width: 100%;
  height: auto;
  max-width: 340px;
}

.architecture-diagram text {
  font-family: var(--font-sans);
}

.diagram-title {
  font-size: 14px;
  font-weight: 600;
  fill: var(--text);
}

.diagram-path {
  font-family: var(--font-mono);
  font-size: 10px;
  fill: var(--accent);
}

.diagram-label {
  font-size: 12px;
  font-weight: 500;
  fill: var(--text);
}

.diagram-sublabel {
  font-size: 10px;
  fill: var(--text-tertiary);
}

.diagram-icon {
  font-size: 10px;
  font-weight: 600;
  fill: var(--accent);
}

.diagram-badge {
  font-size: 9px;
  font-weight: 500;
  fill: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Content Sections */
.content-section {
  padding: var(--space-10) var(--space-4);
  max-width: 72rem;
  margin: 0 auto;
}

.content-section.alt-bg {
  background: var(--bg-elevated);
  max-width: none;
  margin: var(--space-8) 0;
}

.content-section.alt-bg > * {
  max-width: 72rem;
  margin-left: auto;
  margin-right: auto;
}

.section-header {
  margin-bottom: var(--space-6);
}

.section-eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: var(--space-2);
}

.section-header h2 {
  font-size: var(--text-3xl);
  margin: 0;
  letter-spacing: -0.02em;
}

.section-body .large-text {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  max-width: 48rem;
  line-height: 1.7;
  margin-bottom: var(--space-6);
}

/* Problem Grid */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-5);
}

.problem-item {
  padding: var(--space-5);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 1rem;
}

.problem-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-subtle);
  border-radius: 12px;
  margin-bottom: var(--space-4);
  color: var(--accent);
}

.problem-icon svg {
  width: 24px;
  height: 24px;
}

.problem-item h4 {
  font-size: var(--text-base);
  font-weight: 600;
  margin: 0 0 var(--space-2) 0;
}

.problem-item p {
  font-size: var(--text-base);
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.6;
}

/* Principle Cards */
.principles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-5);
}

.principle-card {
  padding: var(--space-6);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 1rem;
  transition: all var(--dur-233);
}

.principle-card:hover {
  border-color: var(--accent);
  box-shadow: 0 8px 32px rgb(0 0 0 / 8%);
  transform: translateY(-4px);
}

.principle-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--accent-subtle) 0%, rgb(45 212 191 / 5%) 100%);
  border: 1px solid var(--accent);
  border-radius: 16px;
  margin-bottom: var(--space-4);
  color: var(--accent);
}

.principle-icon svg {
  width: 28px;
  height: 28px;
}

.principle-card h3 {
  font-size: var(--text-xl);
  font-weight: 600;
  margin: 0 0 var(--space-3) 0;
}

.principle-card p {
  font-size: var(--text-base);
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.6;
}

/* Standards List */
.standards-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.standard-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 1rem;
  text-decoration: none;
  transition: all var(--dur-144);
}

.standard-item:hover {
  border-color: var(--accent);
  background: var(--accent-subtle);
  text-decoration: none;
}

.standard-logo {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-subtle);
  border-radius: 10px;
  color: var(--accent);
  flex-shrink: 0;
}

.standard-logo svg {
  width: 22px;
  height: 22px;
}

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

.standard-info h4 {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text);
  margin: 0 0 var(--space-1) 0;
}

.standard-info p {
  font-size: var(--text-base);
  color: var(--text-secondary);
  margin: 0;
}

.standard-arrow {
  width: 20px;
  height: 20px;
  color: var(--text-tertiary);
  flex-shrink: 0;
  transition: transform var(--dur-144), color var(--dur-144);
}

.standard-item:hover .standard-arrow {
  color: var(--accent);
  transform: translateX(4px);
}

/* Documentation Cards */
.docs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-4);
}

.doc-card {
  display: flex;
  flex-direction: column;
  padding: var(--space-5);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 1rem;
  text-decoration: none;
  transition: all var(--dur-144);
}

.doc-card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 20px rgb(0 0 0 / 8%);
  text-decoration: none;
}

.doc-card-primary {
  grid-column: 1 / -1;
  flex-direction: row;
  align-items: center;
  gap: var(--space-5);
  background: linear-gradient(135deg, var(--accent-subtle) 0%, var(--bg) 50%);
  border-color: var(--accent);
}

@media (width <= 600px) {
  .doc-card-primary {
    flex-direction: column;
    text-align: center;
  }
}

.doc-card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-subtle);
  border-radius: 12px;
  color: var(--accent);
  flex-shrink: 0;
}

.doc-card-primary .doc-card-icon {
  width: 64px;
  height: 64px;
  background: var(--accent);
  color: white;
}

.doc-card-icon svg {
  width: 24px;
  height: 24px;
}

.doc-card-primary .doc-card-icon svg {
  width: 32px;
  height: 32px;
}

.doc-card-content {
  flex: 1;
  margin: var(--space-4) 0;
}

.doc-card-primary .doc-card-content {
  margin: 0;
}

.doc-card-content h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text);
  margin: 0 0 var(--space-2) 0;
}

.doc-card-content p {
  font-size: var(--text-base);
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.6;
}

.doc-card-action {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--accent);
  transition: transform var(--dur-144);
}

.doc-card:hover .doc-card-action {
  transform: translateX(4px);
}

/* CTA Section */
.cta-section {
  padding: var(--space-10) var(--space-4);
  text-align: center;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-elevated) 100%);
}

.cta-content {
  max-width: 36rem;
  margin: 0 auto;
}

.cta-content h2 {
  font-size: var(--text-2xl);
  margin: 0 0 var(--space-3) 0;
}

.cta-content p {
  color: var(--text-secondary);
  margin: 0 0 var(--space-6) 0;
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

/* Legacy Card Grid (for other pages) */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-5);
}

.card {
  padding: var(--space-5);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 1rem;
  transition: all var(--dur-144);
}

.card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgb(0 0 0 / 8%);
}

.card h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-2);
  margin-top: 0;
}

.card p {
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: var(--space-3);
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-family: var(--font-mono);
  font-size: var(--text-base);
  color: var(--accent);
  text-decoration: none;
  transition: gap var(--dur-144);
}

.card-link:hover {
  gap: 0.625rem;
  text-decoration: none;
}

.card-link svg {
  width: 16px;
  height: 16px;
}

/* Reveal Animations */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--dur-377), transform var(--dur-377);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.stagger > * {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--dur-377), transform var(--dur-377);
}

.stagger.visible > *:nth-child(1) {
  transition-delay: 0ms;
}

.stagger.visible > *:nth-child(2) {
  transition-delay: 89ms;
}

.stagger.visible > *:nth-child(3) {
  transition-delay: 178ms;
}

.stagger.visible > * {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal,
  .stagger > * {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ==========================================================================
   404 ERROR PAGE
   ========================================================================== */

.error-page {
  text-align: center;
  padding: var(--space-16) var(--space-4);
}

.error-code {
  font-size: 6rem;
  margin-bottom: var(--space-4);
  color: var(--text-tertiary);
}

.error-title {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-4);
}

.error-message {
  max-width: 28rem;
  margin: 0 auto var(--space-8);
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: center;
}

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

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--text);
}

h2 {
  font-size: var(--text-2xl);
  margin-top: var(--space-8);
  margin-bottom: var(--space-4);
}

h3 {
  font-size: var(--text-xl);
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
}

h4 {
  font-size: var(--text-lg);
  margin-top: var(--space-5);
  margin-bottom: var(--space-2);
}

p {
  margin-bottom: var(--space-4);
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--dur-89);
}

a:hover {
  text-decoration: underline;
}

strong {
  font-weight: 600;
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--bg-code);
  padding: 0.125em 0.375em;
  border-radius: 0.25rem;
  color: var(--accent);
}

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: var(--space-6) 0;
}

/* ==========================================================================
   Lists
   ========================================================================== */

ul, ol {
  margin-bottom: var(--space-4);
  padding-left: var(--space-5);
}

li {
  margin-bottom: var(--space-2);
}

li ul, li ol {
  margin-top: var(--space-2);
  margin-bottom: 0;
}

.goal-list {
  counter-reset: goal;
  list-style: none;
  padding-left: 0;
}

.goal-list li {
  position: relative;
  padding-left: var(--space-6);
  counter-increment: goal;
}

.goal-list li::before {
  content: counter(goal);
  position: absolute;
  left: 0;
  top: 0;
  width: 1.5rem;
  height: 1.5rem;
  background: var(--accent-subtle);
  color: var(--accent);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Definition Lists */
dl {
  margin-bottom: var(--space-4);
}

dt {
  font-weight: 600;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--text);
  margin-top: var(--space-4);
}

dd {
  margin-left: 0;
  margin-top: var(--space-1);
  color: var(--text-secondary);
}

/* ==========================================================================
   Tables
   ========================================================================== */

.table-wrapper {
  overflow-x: auto;
  margin: var(--space-4) 0;
  border: 1px solid var(--border);
  border-radius: 0.75rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-base);
}

caption {
  padding: var(--space-3);
  font-weight: 500;
  text-align: left;
  background: var(--bg-code);
  border-bottom: 1px solid var(--border);
}

th {
  text-align: left;
  font-weight: 600;
  padding: var(--space-3) var(--space-4);
  background: var(--bg-code);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

tr:last-child td {
  border-bottom: none;
}

tbody tr:hover {
  background: var(--accent-subtle);
}

/* ==========================================================================
   Code Blocks
   ========================================================================== */

.code-block {
  margin: var(--space-4) 0;
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  overflow: hidden;
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) var(--space-4);
  background: var(--bg-code);
  border-bottom: 1px solid var(--border);
}

.code-lang {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
}

.copy-btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  min-height: 2.25rem;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--dur-144);
}

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

.copy-btn:active {
  transform: scale(0.95);
}

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

.copy-btn svg {
  width: 14px;
  height: 14px;
}

pre {
  margin: 0;
  padding: var(--space-4);
  overflow-x: auto;
  background: var(--bg-elevated);
}

pre code {
  background: none;
  padding: 0;
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--text);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 2.75rem; /* 44px minimum touch target */
  padding: var(--space-3) var(--space-5);
  font-family: var(--font-mono);
  font-size: var(--text-base);
  font-weight: 500;
  text-decoration: none;
  border-radius: 0.625rem;
  transition: all var(--dur-144);
  cursor: pointer;
  border: none;
}

.btn:hover {
  text-decoration: none;
}

.btn:active {
  transform: scale(0.98);
}

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

.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 4px 12px rgb(13 148 136 / 30%);
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-strong);
}

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

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

footer {
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  padding: var(--space-8) var(--space-4);
  margin-top: var(--space-8);
}

.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (width >= 768px) {
  .footer-container {
    grid-template-columns: 1.5fr 2fr;
  }
}

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

.footer-brand svg {
  width: 32px;
  height: 32px;
  color: var(--accent);
}

.footer-title {
  font-weight: 600;
  font-size: var(--text-lg);
}

.footer-tagline {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  margin-top: var(--space-2);
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--space-6);
}

.footer-col h4 {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-tertiary);
  margin-bottom: var(--space-3);
  margin-top: 0;
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-col li {
  margin-bottom: var(--space-2);
}

.footer-col a {
  font-size: var(--text-base);
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--dur-89);
  padding: var(--space-1) 0;
  display: inline-block;
}

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

.footer-bottom {
  max-width: var(--max-width);
  margin: var(--space-6) auto 0;
  padding-top: var(--space-4);
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: var(--text-sm);
  color: var(--text-tertiary);
}

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

.tagline {
  text-align: center;
  color: var(--text-secondary);
  margin-top: var(--space-6);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

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

@media print {
  header, footer, .progress-bar, .skip-link, .copy-btn, .theme-toggle, .nav-toggle {
    display: none !important;
  }

  body {
    color: black;
    background: white;
  }

  .page-content {
    max-width: none;
    padding: 0;
  }

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

  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
  }
}