/* MADD - Multi-Agent Driven Development
   Design: Technical Brutalist / Editorial Manifesto
   Aesthetic: Precision, Contrast, Authority */

/* ========================================
   CSS VARIABLES
   ======================================== */
:root {
  /* Colors - Dark Theme (Default) - Anthropic/Claude Brand Palette */
  --color-bg: #141413;
  --color-bg-elevated: #1c1c1b;
  --color-bg-card: #222221;
  --color-surface: #2a2a29;

  --color-text-primary: #F0EFEA;
  --color-text-secondary: #b8b7b2;
  --color-text-muted: #828179;

  --color-accent: #CC785C;
  --color-accent-dim: #b56a50;
  --color-accent-glow: rgba(204, 120, 92, 0.2);

  --color-warning: #CC785C;
  --color-error: #d64545;

  --color-border: #3a3a38;
  --color-border-strong: #4a4a47;

  --color-nav-bg: rgba(10, 10, 10, 0.9);

  /* Typography */
  --font-display: 'Space Mono', 'SF Mono', monospace;
  --font-body: 'IBM Plex Sans', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;
  --space-2xl: 8rem;

  /* Layout */
  --max-width: 1200px;
  --content-width: 800px;

  /* Effects */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}

/* Light Theme */
[data-theme="light"] {
  --color-bg: #FFFFFF;
  --color-bg-elevated: #F0EFEA;
  --color-bg-card: #FFFFFF;
  --color-surface: #F0EFEA;

  --color-text-primary: #141413;
  --color-text-secondary: #4a4a47;
  --color-text-muted: #828179;

  --color-accent: #CC785C;
  --color-accent-dim: #b56a50;
  --color-accent-glow: rgba(204, 120, 92, 0.15);

  --color-warning: #CC785C;
  --color-error: #d64545;

  --color-border: #d4d3ce;
  --color-border-strong: #b8b7b2;

  --color-nav-bg: rgba(255, 255, 255, 0.95);
}

/* ========================================
   RESET & BASE
   ======================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

::selection {
  background: var(--color-accent);
  color: var(--color-bg);
}

/* ========================================
   TYPOGRAPHY
   ======================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.5rem, 8vw, 5rem);
  letter-spacing: -0.04em;
}

h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: var(--space-lg);
}

h3 {
  font-size: 1.25rem;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-md);
}

p {
  margin-bottom: var(--space-md);
  color: var(--color-text-secondary);
}

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

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

strong {
  color: var(--color-text-primary);
  font-weight: 600;
}

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--color-surface);
  padding: 0.2em 0.4em;
  border-radius: 3px;
  color: var(--color-accent);
}

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

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

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

/* ========================================
   NAVIGATION
   ======================================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--color-nav-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.nav__logo {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-primary);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.nav__logo-icon {
  width: 32px;
  height: 32px;
  background: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  color: var(--color-bg);
  font-weight: 700;
}

.nav__links {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
}

.nav__link {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: color var(--transition-fast);
}

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

.nav__link--active {
  color: var(--color-accent);
}

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

@media (max-width: 768px) {
  .nav__toggle {
    display: block;
  }

  .nav__links {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: var(--space-lg);
    gap: var(--space-md);
  }

  .nav__links--open {
    display: flex;
  }
}

/* ========================================
   THEME TOGGLE & LANGUAGE SELECTOR
   ======================================== */
.nav__controls {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

/* Theme Toggle */
.theme-toggle {
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: var(--space-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  width: 40px;
  height: 40px;
}

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

.theme-toggle svg {
  width: 20px;
  height: 20px;
}

.theme-toggle__icon--light,
.theme-toggle__icon--dark {
  display: none;
}

[data-theme="dark"] .theme-toggle__icon--light,
:root:not([data-theme]) .theme-toggle__icon--light {
  display: block;
}

[data-theme="light"] .theme-toggle__icon--dark {
  display: block;
}

/* Help Toggle */
.help-toggle {
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: var(--space-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
  width: 36px;
  height: 36px;
}

.help-toggle:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.help-toggle span {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
}

/* Language Selector */
.lang-selector {
  position: relative;
}

.lang-selector__btn {
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: var(--space-sm) var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: all var(--transition-fast);
  height: 40px;
}

.lang-selector__btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.lang-selector__btn svg {
  width: 12px;
  height: 12px;
  transition: transform var(--transition-fast);
}

.lang-selector--open .lang-selector__btn svg {
  transform: rotate(180deg);
}

.lang-selector__dropdown {
  position: absolute;
  top: calc(100% + var(--space-xs));
  right: 0;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  min-width: 120px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-fast);
  z-index: 100;
}

.lang-selector--open .lang-selector__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-selector__option {
  display: block;
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  background: none;
  border: none;
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-align: left;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lang-selector__option:hover {
  background: var(--color-surface);
  color: var(--color-text-primary);
}

.lang-selector__option--active {
  color: var(--color-accent);
}

@media (max-width: 768px) {
  .nav__controls {
    position: absolute;
    right: 60px;
    top: 50%;
    transform: translateY(-50%);
  }

  .lang-selector__dropdown {
    right: auto;
    left: 0;
  }
}

/* ========================================
   HERO
   ======================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: 70px;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(ellipse at 20% 50%, var(--color-accent-glow) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(255, 107, 53, 0.05) 0%, transparent 40%);
  pointer-events: none;
}

.hero__grid {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    linear-gradient(var(--color-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.3;
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  margin-bottom: var(--space-lg);
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-accent);
  background: var(--color-accent-glow);
  animation: fadeInUp 0.6s ease backwards;
}

.hero__badge::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

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

.hero__title {
  margin-bottom: var(--space-lg);
  animation: fadeInUp 0.6s ease 0.1s backwards;
}

.hero__title > span {
  display: block;
}

.hero__title-main {
  color: var(--color-text-primary);
}

.hero__title-accent {
  color: var(--color-accent);
  position: relative;
}

/* Word switch effect - CSS only */
.word-switch {
  display: inline-grid;
  color: var(--color-accent);
  text-align: left;
  justify-items: start;
  vertical-align: baseline;
}

.word-switch__word {
  grid-area: 1 / 1;
  justify-self: start;
  color: var(--color-accent);
  opacity: 0;
  animation-duration: 6s;
  animation-timing-function: cubic-bezier(0.7, 0, 0.3, 1);
  animation-iteration-count: infinite;
}

.word-switch__word--primary {
  opacity: 1;
  animation-name: word-switch-primary;
}

.word-switch__word--alt {
  animation-name: word-switch-alt;
}

@keyframes word-switch-primary {
  0%, 49% {
    opacity: 1;
  }
  50%, 100% {
    opacity: 0;
  }
}

@keyframes word-switch-alt {
  0%, 49% {
    opacity: 0;
  }
  50%, 100% {
    opacity: 1;
  }
}

.hero__subtitle {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: var(--space-xl);
  animation: fadeInUp 0.6s ease 0.2s backwards;
}

.hero__cta {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
  justify-content: center;
  animation: fadeInUp 0.6s ease 0.3s backwards;
}

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

/* ========================================
   INSTALL BLOCK (Terminal-style)
   ======================================== */
.install-block {
  margin-top: var(--space-xl);
  margin-left: auto;
  margin-right: auto;
  max-width: 600px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  overflow: hidden;
  animation: fadeInUp 0.6s ease 0.4s backwards;
}

.install-block__tabs {
  display: flex;
  flex-wrap: wrap;
  background: var(--color-bg-elevated);
  border-bottom: 1px solid var(--color-border);
}

.install-block__tab {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: lowercase;
  letter-spacing: 0.02em;
  padding: var(--space-sm) var(--space-md);
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  position: relative;
  transition: color var(--transition-fast);
}

.install-block__tab:hover {
  color: var(--color-text-secondary);
}

.install-block__tab--active {
  color: var(--color-accent);
}

.install-block__tab--active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-accent);
}

.install-block__body {
  display: flex;
  align-items: center;
  background: #0d0d0c;
  padding: var(--space-md) var(--space-lg);
  gap: var(--space-md);
}

[data-theme="light"] .install-block__body {
  background: #1a1a19;
}

.install-block__command {
  display: none;
  align-items: center;
  gap: var(--space-sm);
  flex: 1;
  min-width: 0;
}

.install-block__command[data-active="true"] {
  display: flex;
}

.install-block__prompt {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  flex-shrink: 0;
  user-select: none;
}

.install-block__code {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: #F0EFEA;
  background: none;
  padding: 0;
  white-space: nowrap;
  overflow-x: auto;
}

.install-block__copy {
  flex-shrink: 0;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.install-block__copy:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.install-block__copy--copied {
  border-color: #4ade80;
  color: #4ade80;
}

@media (max-width: 480px) {
  .install-block {
    max-width: 100%;
  }

  .install-block__body {
    padding: var(--space-sm) var(--space-md);
  }

  .install-block__tab {
    flex: 1 1 50%;
    text-align: center;
  }

  .install-block__code {
    font-size: 0.6875rem;
  }
}

/* ========================================
   BUTTONS
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--space-md) var(--space-lg);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
}

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

.btn--primary:hover {
  background: var(--color-text-primary);
  color: var(--color-bg);
  transform: translateY(-2px);
  box-shadow: 0 10px 40px var(--color-accent-glow);
}

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

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

/* ========================================
   PROBLEM SECTION
   ======================================== */
.problem {
  background: var(--color-bg-elevated);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.problem__header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.problem__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.problem__card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  padding: var(--space-lg);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
}

.problem__card > * {
  position: relative;
  z-index: 1;
}

.problem__card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
}

.problem__card::before {
  content: attr(data-number);
  font-family: var(--font-display);
  font-size: 4rem;
  font-weight: 700;
  color: var(--color-border);
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  line-height: 1;
  opacity: 0.7;
  z-index: 0;
  pointer-events: none;
}

.problem__card h3 {
  color: var(--color-warning);
  margin-bottom: var(--space-md);
  padding-right: 4rem;
}

.problem__card p {
  font-size: 0.9375rem;
}

@media (max-width: 640px) {
  .problem__card::before {
    font-size: 3rem;
  }

  .problem__card h3 {
    padding-right: 3rem;
  }
}

/* ========================================
   PRINCIPLES SECTION
   ======================================== */
.principles__list {
  display: grid;
  gap: var(--space-xl);
}

.principle {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-lg);
  align-items: start;
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-border);
}

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

.principle__number {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  width: 80px;
}

.principle__content h3 {
  font-family: var(--font-body);
  font-size: 1.5rem;
  color: var(--color-text-primary);
  text-transform: none;
  letter-spacing: normal;
  margin-bottom: var(--space-md);
}

.principle__content p {
  margin-bottom: var(--space-md);
}

.principle__change {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-accent);
  padding-left: var(--space-md);
  border-left: 2px solid var(--color-accent);
}

@media (max-width: 640px) {
  .principle {
    grid-template-columns: 1fr;
  }
  
  .principle__number {
    font-size: 2rem;
    width: auto;
  }
}

/* ========================================
   AGENTS SECTION
   ======================================== */
.agents {
  background: var(--color-bg-elevated);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.agents__header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.agents__diagram {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  padding: var(--space-xl);
  margin-bottom: var(--space-xl);
  overflow-x: auto;
}

.agents__flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  min-width: 700px;
}

.agent-box {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  padding: var(--space-lg);
  text-align: center;
  min-width: 150px;
  transition: all var(--transition-base);
}

.agent-box:hover {
  border-color: var(--color-accent);
  box-shadow: 0 0 30px var(--color-accent-glow);
}

.agent-box__icon {
  font-size: 2rem;
  margin-bottom: var(--space-sm);
}

.agent-box__name {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}

.agent-box__role {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.agent-arrow {
  color: var(--color-text-muted);
  font-size: 1.5rem;
}

/* Grid-based diagram layout */
.agents__diagram--grid {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  overflow-x: visible;
}

.diagram__row {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
}

.diagram__row--spec {
  margin-bottom: var(--space-xs);
}

.diagram__row--arrow {
  flex-direction: column;
  gap: var(--space-xs);
  padding: var(--space-xs) 0;
}

.diagram__row--contract {
  margin: var(--space-xs) 0;
}

/* Arrows row - use CSS Grid for precise alignment */
.diagram__row--arrows-to-agents {
  display: grid;
  grid-template-columns: 180px 24px 180px 24px 180px;
  gap: var(--space-md);
  justify-content: center;
  padding: var(--space-sm) 0 0 0;
}

.diagram__arrow-col {
  display: flex;
  justify-content: center;
  align-items: center;
}

.diagram__arrow-col--dev {
  grid-column: 1;
}

.diagram__arrow-col--audit {
  grid-column: 3;
}

.diagram__arrow-col--scribe {
  grid-column: 5;
}

/* Labels row */
.diagram__row--labels {
  display: grid;
  grid-template-columns: 180px 24px 180px 24px 180px;
  gap: var(--space-md);
  justify-content: center;
  padding: 0 0 var(--space-sm) 0;
}

.diagram__row--labels .agent-arrow-label:first-child {
  grid-column: 1 / 4;
  text-align: center;
}

.diagram__row--labels .agent-arrow-label:last-child {
  grid-column: 5;
  text-align: center;
}

/* Agents row - use same grid for alignment */
.diagram__row--agents {
  display: grid;
  grid-template-columns: 180px 24px 180px 24px 180px;
  gap: var(--space-md);
  justify-content: center;
  align-items: center;
}

.diagram__agent-cell {
  display: flex;
  justify-content: center;
}

.diagram__agent-cell .agent-box {
  width: 100%;
}

.diagram__horizontal-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
}

.diagram__horizontal-arrow .agent-arrow {
  font-size: 1.5rem;
  color: var(--color-info, #60a5fa);
}

.agent-arrow--down {
  font-size: 1.25rem;
  color: var(--color-text-muted);
}

.agent-arrow--up {
  font-size: 1.25rem;
  color: var(--color-success, #4ade80);
}

.agent-arrow-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
}

.contract-hub {
  padding: var(--space-md);
}

.contract-hub__inner {
  background: linear-gradient(135deg, var(--color-accent-glow), transparent);
  border: 2px solid var(--color-accent);
  padding: var(--space-lg) var(--space-xl);
  text-align: center;
  position: relative;
  box-shadow: 0 0 40px var(--color-accent-glow);
  min-width: 650px;
}

.contract-hub__icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-sm);
}

.contract-hub__title {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}

.contract-hub__subtitle {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  font-style: italic;
}

.agent-box--writer .agent-box__name {
  color: var(--color-success, #4ade80);
}

.agent-box--reader .agent-box__name {
  color: var(--color-info, #60a5fa);
}

/* Full-bleed diagram - overflows container like Substack images */
.agents__diagram--full-bleed {
  width: 100vw;
  position: relative;
  left: 50%;
  right: 50%;
  margin-left: -50vw;
  margin-right: -50vw;
  padding: var(--space-xl) var(--space-lg);
  overflow-x: hidden;
}

.agents__diagram--full-bleed .agents__flow {
  min-width: auto;
  flex-wrap: nowrap;
  justify-content: center;
}

.agents__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
}

.agent-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  padding: var(--space-lg);
}

.agent-card__header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.agent-card__icon {
  width: 48px;
  height: 48px;
  background: var(--color-accent-glow);
  border: 1px solid var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.agent-card__name {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.agent-card__list {
  list-style: none;
}

.agent-card__list li {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  padding: var(--space-xs) 0;
  padding-left: var(--space-md);
  position: relative;
}

.agent-card__list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-text-muted);
}

/* ========================================
   COMPARISON SECTION
   ======================================== */
.comparison__table-wrapper {
  overflow-x: auto;
  margin-top: var(--space-lg);
}

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

.comparison__table th,
.comparison__table td {
  padding: var(--space-md);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.comparison__table th {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  background: var(--color-bg-elevated);
}

.comparison__table th:last-child {
  color: var(--color-accent);
}

.comparison__table td:first-child {
  font-weight: 600;
  color: var(--color-text-primary);
}

.comparison__table td:last-child {
  color: var(--color-accent);
}

.comparison__table tr:hover td {
  background: var(--color-bg-elevated);
}

.comparison__subtitle {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
}

.comparison__subtitle:first-of-type {
  margin-top: var(--space-lg);
}

.comparison__subtitle--sdd {
  margin-top: var(--space-2xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
}

.comparison__intro {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  line-height: 1.6;
  margin-bottom: var(--space-md);
}

.comparison__note {
  margin-top: var(--space-lg);
  padding: var(--space-md) var(--space-lg);
  background: var(--color-bg-elevated);
  border-left: 3px solid var(--color-accent);
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.comparison__note strong {
  color: var(--color-text-primary);
}

.comparison__note em {
  color: var(--color-accent);
  font-style: normal;
}

/* SDD comparison table (4 columns) */
.comparison__table--sdd th:nth-child(4),
.comparison__table--sdd td:nth-child(4) {
  color: var(--color-accent);
}

.comparison__table--sdd th:nth-child(2),
.comparison__table--sdd th:nth-child(3) {
  color: var(--color-text-muted);
}

.comparison__table--sdd td:nth-child(2),
.comparison__table--sdd td:nth-child(3) {
  color: var(--color-text-secondary);
}

/* ========================================
   QUICKSTART SECTION
   ======================================== */
.quickstart {
  background: var(--color-bg-elevated);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.quickstart__tabs {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.quickstart__tab {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--space-md) var(--space-lg);
  background: none;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  position: relative;
  transition: color var(--transition-fast);
}

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

.quickstart__tab--active {
  color: var(--color-accent);
}

.quickstart__tab--active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-accent);
}

.quickstart__content {
  display: none;
}

.quickstart__content--active {
  display: block;
  animation: fadeIn 0.3s ease;
}

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

.quickstart__steps {
  display: grid;
  gap: var(--space-lg);
}

.quickstart__step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-md);
}

.quickstart__step-number {
  width: 32px;
  height: 32px;
  background: var(--color-accent);
  color: var(--color-bg);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.quickstart__step h4 {
  font-family: var(--font-body);
  font-size: 1.125rem;
  color: var(--color-text-primary);
  margin-bottom: var(--space-sm);
}

.quickstart__step p {
  font-size: 0.9375rem;
  margin-bottom: 0;
}

/* ========================================
   CTA SECTION
   ======================================== */
.cta {
  text-align: center;
  position: relative;
}

.cta::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--color-accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

.cta__content {
  position: relative;
  z-index: 1;
}

.cta h2 {
  margin-bottom: var(--space-md);
}

.cta p {
  font-size: 1.125rem;
  max-width: 500px;
  margin: 0 auto var(--space-lg);
}

.cta .hero__cta {
  justify-content: center;
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-xl) 0;
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer__copy {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.footer__links {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
}

.footer__link {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

/* ========================================
   UTILITIES
   ======================================== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-accent {
  color: var(--color-accent);
}

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

/* ========================================
   PAGE SPECIFIC - MANIFESTO
   ======================================== */
.page-header {
  padding-top: calc(70px + var(--space-2xl));
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-border);
}

.page-header h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: var(--space-md);
}

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

.page-content h2 {
  margin-top: var(--space-xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
}

.page-content h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.page-content ul,
.page-content ol {
  margin-bottom: var(--space-md);
  padding-left: var(--space-lg);
  color: var(--color-text-secondary);
}

.page-content li {
  margin-bottom: var(--space-sm);
}

/* Not this table */
.not-table {
  display: grid;
  gap: var(--space-md);
  margin: var(--space-lg) 0;
}

.not-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
}

.not-row__left {
  color: var(--color-text-muted);
  text-decoration: line-through;
}

.not-row__right {
  color: var(--color-text-secondary);
}

@media (max-width: 640px) {
  .not-row {
    grid-template-columns: 1fr;
  }
}

/* ========================================
   CODE BLOCKS
   ======================================== */
.code-block {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 0;
  margin: var(--space-lg) 0;
  overflow: hidden;
}

.code-block pre {
  margin: 0;
  padding: var(--space-lg);
  overflow-x: auto;
}

.code-block code {
  background: none;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
  display: block;
  white-space: pre;
}

.page-content pre {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  padding: var(--space-lg);
  overflow-x: auto;
  margin: var(--space-lg) 0;
}

/* Remove double border when pre is inside code-block */
.page-content .code-block pre {
  background: none;
  border: none;
  margin: 0;
}

.page-content pre code {
  background: none;
  padding: 0;
  color: var(--color-text-secondary);
}

/* ========================================
   Keyboard Help Modal
   ======================================== */

.keyboard-help-modal {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

.keyboard-help-modal--visible {
  opacity: 1;
  visibility: visible;
}

.keyboard-help-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
}

.keyboard-help-modal__content {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  max-width: 600px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
  transform: translateY(20px);
  transition: transform 0.2s ease;
}

.keyboard-help-modal--visible .keyboard-help-modal__content {
  transform: translateY(0);
}

.keyboard-help-modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.keyboard-help-modal__header h3 {
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 0;
}

.keyboard-help-modal__close {
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  padding: 0.25rem;
  transition: color 0.15s ease;
}

.keyboard-help-modal__close:hover {
  color: var(--color-accent);
}

.keyboard-help-modal__body {
  padding: var(--space-lg);
  display: grid;
  gap: var(--space-lg);
}

@media (min-width: 480px) {
  .keyboard-help-modal__body {
    grid-template-columns: repeat(2, 1fr);
  }

  .keyboard-help-modal__section:first-child {
    grid-column: 1 / -1;
  }
}

.keyboard-help-modal__section h4 {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin: 0 0 var(--space-sm) 0;
}

.keyboard-help-modal__section ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.keyboard-help-modal__section li {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  padding: 0.375rem 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

kbd {
  display: inline-block;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 0.125rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-primary);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
  min-width: 1.5rem;
  text-align: center;
}

/* ========================================
   MOBILE RESPONSIVE FIXES
   ======================================== */
@media (max-width: 480px) {
  /* Reduce container padding on small screens */
  .container {
    padding: 0 var(--space-md);
  }

  /* Fix hero section overflow */
  .hero {
    overflow: visible;
  }

  .hero__title {
    word-wrap: break-word;
    overflow-wrap: break-word;
  }

  /* Reduce section padding */
  section {
    padding: var(--space-xl) 0;
  }

  /* Fix agents diagram - stack vertically on mobile */
  .agents__diagram {
    padding: var(--space-md);
    overflow-x: visible;
  }

  .agents__flow {
    min-width: auto;
    flex-direction: column;
    gap: var(--space-md);
  }

  .agent-box {
    min-width: auto;
    width: 100%;
  }

  .agent-arrow {
    transform: rotate(90deg);
  }

  /* Grid diagram responsive */
  .agents__diagram--grid {
    gap: var(--space-xs);
  }

  .diagram__row--arrows-to-agents,
  .diagram__row--labels,
  .diagram__row--agents {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    width: 100%;
  }

  .diagram__row--arrows-to-agents {
    flex-direction: row;
    justify-content: space-around;
  }

  .diagram__row--labels {
    flex-direction: row;
    justify-content: space-around;
  }

  .diagram__agent-cell {
    width: 100%;
  }

  .diagram__agent-cell .agent-box {
    width: 100%;
  }

  .diagram__horizontal-arrow {
    transform: rotate(90deg);
    padding: var(--space-sm) 0;
  }

  .diagram__row--arrow {
    padding: var(--space-sm) 0;
  }

  .contract-hub__inner {
    padding: var(--space-md);
  }

  .contract-hub__title {
    font-size: 1rem;
  }

  /* Fix quickstart tabs - allow wrapping */
  .quickstart__tabs {
    flex-wrap: wrap;
  }

  .quickstart__tab {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.75rem;
  }

  /* Fix comparison table */
  .comparison__table {
    font-size: 0.8125rem;
  }

  .comparison__table th,
  .comparison__table td {
    padding: var(--space-sm);
  }

  /* Fix footer layout */
  .footer__inner {
    flex-direction: column;
    text-align: center;
  }

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

  /* Fix CTA radial gradient overflow */
  .cta::before {
    width: 300px;
    height: 300px;
  }

  /* Fix nav controls positioning */
  .nav__controls {
    right: 50px;
    gap: var(--space-sm);
  }

  .theme-toggle,
  .help-toggle {
    width: 36px;
    height: 36px;
    padding: var(--space-xs);
  }

  .lang-selector__btn {
    padding: var(--space-xs) var(--space-sm);
    height: 36px;
    font-size: 0.6875rem;
  }
}