:root {
  --paper: #f4f1eb;
  --ink: #2b2826;
  --ink-light: #5a5550;
  --signal-cyan: #00e5ff;
  --signal-pink: #ff3366;
  --grid-line: rgba(0, 0, 0, 0.06);
  --font-serif: "Charter", "Georgia", serif;
  --font-mono: "IBM Plex Mono", "Courier New", monospace;
  --font-ui: system-ui, -apple-system, sans-serif;
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--paper);
  background-image: 
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 20px 20px;
  color: var(--ink);
  font-family: var(--font-serif);
  line-height: 1.6;
  display: flex;
  min-height: 100vh;
}

#progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  background: var(--signal-pink);
  width: 0%;
  z-index: 1000;
  transition: width 0.1s ease-out;
}

.mobile-menu-toggle {
  display: none;
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 2000;
  background: var(--ink);
  color: var(--paper);
  border: none;
  padding: 0.5rem 1rem;
  font-family: var(--font-ui);
  text-transform: uppercase;
  font-weight: bold;
  font-size: 0.8rem;
  cursor: pointer;
}

.mobile-menu-toggle:focus {
  outline: 3px solid var(--signal-cyan);
  outline-offset: 2px;
}

.menu-backdrop {
  display: none;
}

nav.sidebar {
  width: 250px;
  flex-shrink: 0;
  background: rgba(244, 241, 235, 0.95);
  border-right: 1px solid var(--ink);
  padding: 2rem 1rem;
  position: sticky;
  top: 0;
  height: 100vh;
  box-sizing: border-box;
  overflow-y: auto;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  transition: transform 0.3s ease;
}

nav.sidebar h1 {
  font-size: 1rem;
  margin-bottom: 2rem;
  color: var(--signal-pink);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

nav.sidebar ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

nav.sidebar li {
  margin-bottom: 0.75rem;
}

nav.sidebar a {
  text-decoration: none;
  color: var(--ink-light);
  display: block;
  padding: 0.25rem 0;
  transition: color 0.2s, padding-left 0.2s;
}

nav.sidebar a:hover, nav.sidebar a.active {
  color: var(--ink);
  padding-left: 0.5rem;
  border-left: 2px solid var(--signal-cyan);
}

nav.sidebar a:focus {
  outline: 2px solid var(--signal-cyan);
  outline-offset: 2px;
}

main {
  flex: 1;
  max-width: 900px;
  padding: 3rem 4rem;
  box-sizing: border-box;
}

h1, h2, h3 {
  font-weight: normal;
  margin-top: 2em;
  margin-bottom: 1em;
}

h1 { font-size: 2.5rem; border-bottom: 2px solid var(--ink); padding-bottom: 0.5rem; margin-top: 0; }
h2 { font-size: 1.8rem; color: var(--signal-pink); }
h3 { font-size: 1.3rem; font-family: var(--font-mono); }

p { margin-bottom: 1.5rem; font-size: 1.1rem; }

a { color: var(--signal-pink); text-decoration: underline; text-decoration-color: var(--grid-line); text-underline-offset: 4px; }
a:hover { text-decoration-color: var(--signal-pink); }

code, .mono {
  font-family: var(--font-mono);
  background: rgba(0,0,0,0.05);
  padding: 0.1em 0.3em;
  border-radius: 3px;
  font-size: 0.9em;
}

.label-box {
  display: inline-block;
  font-family: var(--font-ui);
  font-size: 0.7rem;
  text-transform: uppercase;
  font-weight: bold;
  padding: 0.2em 0.5em;
  margin-bottom: 1rem;
  border: 1px solid currentColor;
}
.label-established { color: #008800; border-color: #008800; }
.label-research { color: var(--signal-pink); border-color: var(--signal-pink); }
.label-intuition { color: var(--signal-cyan); border-color: var(--signal-cyan); background: #222; }

figure.interactive {
  border: 1px solid var(--ink);
  background: white;
  padding: 1.5rem;
  margin: 2rem 0;
  box-shadow: 4px 4px 0 var(--grid-line);
}

figure.interactive figcaption {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--ink-light);
  margin-top: 1rem;
  text-align: right;
  border-top: 1px dashed var(--grid-line);
  padding-top: 0.5rem;
}

.demo-layout {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  flex-wrap: wrap;
}

.demo-controls {
  flex: 1;
  min-width: 200px;
}

.demo-output {
  flex: 2;
  min-width: 300px;
}

.demo-layout-centered { align-items: center; }
.demo-controls-offset { margin-left: 2rem; }
.noise-canvas { display: block; background: var(--paper); border: 1px solid var(--grid-line); }
.control-label-spaced { margin-top: 1.5rem; }
.signal-pink { color: var(--signal-pink); }
.world-grid { display: grid; grid-template-columns: repeat(3, 40px); grid-template-rows: repeat(3, 40px); gap: 2px; }
.demo-output-divided { border-left: 1px dashed var(--grid-line); padding-left: 1rem; }
.world-log { font-size: 0.85rem; margin-top: 1rem; color: var(--ink-light); }

.filter-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.filter-field select { width: 100%; }

.controls {
  margin-bottom: 1rem;
  font-family: var(--font-ui);
}

.controls label { display: block; margin-bottom: 0.5rem; font-size: 0.9rem; font-weight: bold; }
input[type=range] { width: 100%; margin-bottom: 1rem; accent-color: var(--signal-pink); }
select, button { font-family: var(--font-ui); padding: 0.4rem 0.8rem; border: 1px solid var(--ink); background: white; cursor: pointer; }
button:hover { background: var(--signal-cyan); color: white; border-color: var(--signal-cyan); }
button:focus { outline: 2px solid var(--signal-pink); outline-offset: 2px; }

table.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-family: var(--font-ui);
  font-size: 0.85rem;
}
table.data-table th, table.data-table td {
  border: 1px solid var(--grid-line);
  padding: 0.6rem;
  text-align: left;
  vertical-align: top;
}
table.data-table th { background: rgba(0,0,0,0.03); font-weight: bold; color: var(--ink-light); }

.table-scroll {
  max-width: 100%;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  border: 1px solid var(--grid-line);
}

.table-scroll:focus { outline: 2px solid var(--signal-cyan); outline-offset: 2px; }
.table-scroll .data-table { margin: 0; }
.data-table-wide { min-width: 1120px; }
.data-table-control { min-width: 760px; }

.learning-map {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 2rem 0;
  padding: 1.5rem;
  background: rgba(0,0,0,0.02);
  border: 1px dashed var(--ink);
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.map-node {
  padding: 0.5rem 1rem;
  background: white;
  border: 1px solid var(--ink);
  text-decoration: none;
  color: var(--ink);
}

.map-node:hover {
  background: var(--signal-cyan);
  color: white;
  text-decoration: none;
}

.map-arrow {
  display: flex;
  align-items: center;
  color: var(--ink-light);
}

.map-arrow-synthesis { margin-left: auto; }

.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-light);
  margin-bottom: 2rem;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  justify-content: space-between;
  margin-top: 4rem;
  padding-top: 1rem;
  border-top: 1px dashed var(--ink);
  font-family: var(--font-mono);
}

.references {
  margin-top: 4rem;
  background: rgba(0,0,0,0.02);
  padding: 2rem;
  border-left: 4px solid var(--signal-cyan);
}
.references h3 { margin-top: 0; font-size: 1.1rem; }
.references ul { font-size: 0.9rem; padding-left: 1.2rem; }

/* Mobile */
@media (max-width: 768px) {
  body { flex-direction: column; }
  .mobile-menu-toggle { display: block; }
  nav.sidebar { 
    position: fixed; 
    top: 0; 
    left: 0; 
    z-index: 1500; 
    transform: translateX(-100%);
    width: min(86vw, 320px);
    background: var(--paper);
    box-shadow: 2px 0 10px rgba(0,0,0,0.1);
  }
  nav.sidebar.open { transform: translateX(0); }
  .menu-backdrop {
    position: fixed;
    inset: 0;
    z-index: 1400;
    background: rgba(43, 40, 38, 0.55);
  }
  .menu-backdrop.open { display: block; }
  main { padding: 4rem 1.5rem 1.5rem; max-width: 100%; min-width: 0; }
  figure.interactive { padding: 1rem; }
  .filter-grid { grid-template-columns: 1fr; }
  .demo-controls-offset { margin-left: 0; }
  .demo-output-divided { border-left: 0; border-top: 1px dashed var(--grid-line); padding: 1rem 0 0; }
  .map-arrow-synthesis { margin-left: 0; }
}