:root {
  --noma-bg: #fbfaf7;
  --noma-fg: #1d1c1a;
  --noma-muted: #6b6a66;
  --noma-rule: #e7e4dc;
  --noma-accent: #b9522a;
  --noma-accent-soft: #f4dccd;
  --noma-claim: #2c5d8f;
  --noma-claim-soft: #dfeaf5;
  --noma-evidence: #2f7d4a;
  --noma-evidence-soft: #dff0e3;
  --noma-risk: #a8362e;
  --noma-risk-soft: #f7d9d4;
  --noma-code-bg: #f1ede4;
  --noma-card-bg: #ffffff;
  --noma-shadow: 0 1px 0 rgba(0, 0, 0, 0.04), 0 8px 24px -16px rgba(20, 20, 20, 0.18);
  --noma-radius: 10px;
  --noma-cols: 2;
  --noma-font-serif: "Iowan Old Style", "Charter", Georgia, serif;
  --noma-font-sans: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", system-ui, sans-serif;
  --noma-font-mono: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--noma-bg);
  color: var(--noma-fg);
  font-family: var(--noma-font-serif);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main.noma-doc {
  max-width: 760px;
  margin: 4rem auto;
  padding: 0 1.5rem 6rem;
}

main.noma-doc > section.noma-hero ~ section,
main.noma-doc > .noma-grid {
  max-width: 100%;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--noma-font-sans);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 2.5em 0 0.6em;
}
h1 { font-size: 2.4rem; margin-top: 0; letter-spacing: -0.02em; }
h2 { font-size: 1.7rem; border-bottom: 1px solid var(--noma-rule); padding-bottom: 0.3em; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.05rem; color: var(--noma-muted); text-transform: uppercase; letter-spacing: 0.06em; }

p { margin: 0 0 1.05em; }
a { color: var(--noma-accent); text-decoration: underline; text-underline-offset: 2px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }

code {
  font-family: var(--noma-font-mono);
  font-size: 0.9em;
  background: var(--noma-code-bg);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}
pre {
  background: var(--noma-code-bg);
  padding: 1em 1.2em;
  border-radius: var(--noma-radius);
  overflow-x: auto;
  font-size: 0.9rem;
  line-height: 1.5;
}
pre code { background: none; padding: 0; }

blockquote {
  border-left: 3px solid var(--noma-accent);
  margin: 1.5em 0;
  padding: 0.2em 1.2em;
  color: var(--noma-muted);
  font-style: italic;
}

hr { border: 0; border-top: 1px solid var(--noma-rule); margin: 3em 0; }

ul, ol { padding-left: 1.4em; }
li { margin: 0.25em 0; }

/* Callouts */
aside.noma-callout {
  margin: 1.6em 0;
  padding: 1em 1.2em;
  border-radius: var(--noma-radius);
  background: var(--noma-accent-soft);
  border-left: 3px solid var(--noma-accent);
}
aside.noma-callout-warning { background: #fbe6df; border-color: var(--noma-risk); }
aside.noma-callout-tip     { background: #e6f3eb; border-color: var(--noma-evidence); }
aside.noma-callout-note    { background: #ecedf2; border-color: #5a6071; }

/* Research blocks */
aside.noma-research {
  margin: 1.6em 0;
  padding: 1em 1.2em;
  border-radius: var(--noma-radius);
  background: var(--noma-card-bg);
  border: 1px solid var(--noma-rule);
  box-shadow: var(--noma-shadow);
}
aside.noma-research .noma-research-head {
  display: flex;
  align-items: center;
  gap: 0.8em;
  margin-bottom: 0.5em;
}
aside.noma-research .noma-tag {
  display: inline-block;
  font-family: var(--noma-font-sans);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--noma-muted);
  padding: 0.2em 0.6em;
  border-radius: 999px;
  background: var(--noma-code-bg);
}
aside.noma-claim          { border-left: 3px solid var(--noma-claim); }
aside.noma-claim .noma-tag { color: var(--noma-claim); background: var(--noma-claim-soft); }
aside.noma-evidence       { border-left: 3px solid var(--noma-evidence); }
aside.noma-evidence .noma-tag { color: var(--noma-evidence); background: var(--noma-evidence-soft); }
aside.noma-counterevidence { border-left: 3px solid var(--noma-risk); }
aside.noma-counterevidence .noma-tag { color: var(--noma-risk); background: var(--noma-risk-soft); }
aside.noma-risk           { border-left: 3px solid var(--noma-risk); }
aside.noma-risk .noma-tag  { color: var(--noma-risk); background: var(--noma-risk-soft); }
aside.noma-decision, aside.noma-adr { border-left: 3px solid var(--noma-accent); }
aside.noma-decision .noma-tag, aside.noma-adr .noma-tag { color: var(--noma-accent); background: var(--noma-accent-soft); }
aside.noma-open_question { border-left: 3px solid #8b6c1a; }
aside.noma-open_question .noma-tag { color: #8b6c1a; background: #f5ebcf; }
aside.noma-assumption { border-left: 3px solid #5a6071; }
aside.noma-assumption .noma-tag { color: #5a6071; background: #ecedf2; }

/* Variants — themable per-block emphasis without inline styling */
[data-variant="important"] { border-width: 5px !important; box-shadow: 0 0 0 1px var(--noma-accent) inset, var(--noma-shadow); }
[data-variant="subtle"] { opacity: 0.78; box-shadow: none; }
[data-variant="success"] { border-left: 3px solid var(--noma-evidence); background: var(--noma-evidence-soft); }
[data-variant="danger"]  { border-left: 3px solid var(--noma-risk); background: var(--noma-risk-soft); }
[data-variant="info"]    { border-left: 3px solid var(--noma-claim); background: var(--noma-claim-soft); }

/* Export buttons (artifact-side action surface) */
.noma-export-button {
  display: inline-block;
  background: var(--noma-fg);
  color: var(--noma-bg);
  border: 0;
  padding: 0.55em 1.1em;
  margin: 0.3em 0.4em 0.3em 0;
  border-radius: 999px;
  font-family: var(--noma-font-sans);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 120ms ease;
}
.noma-export-button:hover { background: var(--noma-accent); color: white; }
.noma-export-button[data-format="prompt"] { background: var(--noma-claim); }
.noma-export-button[data-format="markdown"] { background: var(--noma-evidence); }
.noma-export-button[data-format="json"] { background: var(--noma-muted); }

/* Controls (interactive artifact blocks) */
.noma-control {
  margin: 1em 0;
  padding: 0.8em 1em;
  background: var(--noma-card-bg);
  border: 1px solid var(--noma-rule);
  border-radius: var(--noma-radius);
  font-family: var(--noma-font-sans);
  font-size: 0.9rem;
}
.noma-control input { margin-left: 0.6em; }

.noma-confidence {
  flex: 1;
  height: 6px;
  border-radius: 999px;
  background: var(--noma-rule);
  overflow: hidden;
  max-width: 140px;
}
.noma-confidence-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--noma-accent), var(--noma-claim));
}

.noma-meta {
  margin-top: 0.6em;
  font-size: 0.85rem;
  color: var(--noma-muted);
  font-family: var(--noma-font-sans);
}
.noma-meta-key {
  font-weight: 600;
  color: var(--noma-fg);
}

/* Grid */
.noma-grid {
  display: grid;
  grid-template-columns: repeat(var(--noma-cols), minmax(0, 1fr));
  gap: 1.2rem;
  margin: 2em 0;
}
@media (max-width: 720px) {
  .noma-grid { grid-template-columns: 1fr; }
}

/* Card */
article.noma-card {
  background: var(--noma-card-bg);
  border: 1px solid var(--noma-rule);
  border-radius: var(--noma-radius);
  padding: 1.2em 1.4em;
  box-shadow: var(--noma-shadow);
}
article.noma-card .noma-card-head {
  display: flex;
  align-items: center;
  gap: 0.6em;
  margin-bottom: 0.4em;
}
article.noma-card h3 {
  margin: 0;
  font-size: 1.05rem;
  font-family: var(--noma-font-sans);
}
article.noma-card .noma-icon {
  color: var(--noma-accent);
  font-size: 0.9em;
}
article.noma-card p:last-child { margin-bottom: 0; }

/* Hero */
section.noma-hero {
  background: linear-gradient(180deg, var(--noma-accent-soft), transparent);
  padding: 4rem 2.5rem 3rem;
  border-radius: var(--noma-radius);
  margin: 0 0 3rem;
  text-align: center;
}
section.noma-hero h1 { font-size: 2.8rem; margin-top: 0; }

a.noma-button {
  display: inline-block;
  background: var(--noma-fg);
  color: var(--noma-bg);
  padding: 0.7em 1.4em;
  border-radius: 999px;
  text-decoration: none;
  font-family: var(--noma-font-sans);
  font-weight: 600;
  font-size: 0.95rem;
  margin-top: 0.5em;
}
a.noma-button:hover { background: var(--noma-accent); color: white; }

/* Plot */
figure.noma-plot {
  margin: 1.8em 0;
  padding: 1em 1.2em;
  background: var(--noma-card-bg);
  border: 1px solid var(--noma-rule);
  border-radius: var(--noma-radius);
}
figure.noma-plot .noma-plot-canvas {
  color: var(--noma-claim);
  background: linear-gradient(180deg, transparent, var(--noma-claim-soft));
  border-radius: 6px;
  padding: 0.6em;
}
figure.noma-plot svg { width: 100%; height: auto; display: block; }
figure.noma-plot figcaption {
  margin-top: 0.6em;
  font-size: 0.85rem;
  color: var(--noma-muted);
  font-family: var(--noma-font-sans);
}

/* Dataset */
details.noma-dataset {
  margin: 1.4em 0;
  padding: 0.6em 1em;
  background: var(--noma-code-bg);
  border-radius: var(--noma-radius);
  font-family: var(--noma-font-sans);
  font-size: 0.9rem;
}
details.noma-dataset pre {
  background: transparent;
  padding: 0.6em 0 0;
}

/* Agent task */
.noma-agent-task {
  margin: 1.4em 0;
  padding: 1em 1.2em;
  background: var(--noma-claim-soft);
  border-left: 3px solid var(--noma-claim);
  border-radius: var(--noma-radius);
}
.noma-agent-task label {
  display: flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--noma-font-sans);
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.4em;
}

/* State change */
aside.noma-state-change {
  margin: 1.4em 0;
  padding: 1em 1.2em;
  background: var(--noma-card-bg);
  border: 1px solid var(--noma-rule);
  border-left: 3px solid var(--noma-fg);
  border-radius: var(--noma-radius);
  font-family: var(--noma-font-sans);
}
.noma-state-change-head {
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  color: var(--noma-muted, var(--noma-fg));
  margin-bottom: 0.4em;
  display: flex;
  align-items: center;
  gap: 0.5em;
  flex-wrap: wrap;
}
.noma-state-change-delta {
  font-size: 1rem;
  display: flex;
  align-items: baseline;
  gap: 0.6em;
  margin: 0.3em 0 0.5em;
  font-variant-numeric: tabular-nums;
}
.noma-state-from {
  text-decoration: line-through;
  opacity: 0.65;
}
.noma-state-to {
  font-weight: 700;
}
.noma-state-arrow {
  opacity: 0.55;
  font-size: 0.95em;
}

/* Tables */
table.noma-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.6em 0;
  font-family: var(--noma-font-sans);
  font-size: 0.92rem;
  background: var(--noma-card-bg);
  border: 1px solid var(--noma-rule);
  border-radius: var(--noma-radius);
  overflow: hidden;
  box-shadow: var(--noma-shadow);
}
table.noma-table thead {
  background: var(--noma-code-bg);
}
table.noma-table th {
  text-align: left;
  font-weight: 700;
  letter-spacing: 0.02em;
  padding: 0.7em 1em;
  border-bottom: 1px solid var(--noma-rule);
  color: var(--noma-fg);
}
table.noma-table td {
  padding: 0.6em 1em;
  border-bottom: 1px solid var(--noma-rule);
  vertical-align: top;
}
table.noma-table tbody tr:last-child td { border-bottom: 0; }
table.noma-table tbody tr:hover { background: rgba(185, 82, 42, 0.04); }

/* Print */
@media print {
  html, body { background: white; font-size: 11pt; }
  main.noma-doc { margin: 0 auto; padding: 0; max-width: 100%; }
  section.noma-hero { background: none; border: 1px solid var(--noma-rule); }
  a { color: var(--noma-fg); }
  pre, article.noma-card, figure.noma-plot, aside.noma-research, details.noma-dataset {
    box-shadow: none;
    page-break-inside: avoid;
  }
  h1, h2, h3 { page-break-after: avoid; }
}

/* v0.4 — alias anchors (offset for sticky-headed pages) */
a.noma-alias {
  display: block;
  position: relative;
  top: -1.2em;
  visibility: hidden;
  height: 0;
}

/* v0.4 — multi-page site nav (rendered above main when --to site) */
nav.noma-site-nav {
  max-width: 880px;
  margin: 1.5rem auto 0;
  padding: 0 2rem;
  display: flex;
  align-items: baseline;
  gap: 1.5rem;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: var(--noma-muted);
}
nav.noma-site-nav a.noma-site-home {
  font-weight: 600;
  color: var(--noma-fg);
  text-decoration: none;
  border-right: 1px solid var(--noma-rule);
  padding-right: 1.25rem;
}
nav.noma-site-nav ol {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  counter-reset: chap;
}
nav.noma-site-nav li {
  counter-increment: chap;
}
nav.noma-site-nav li::before {
  content: counter(chap, decimal-leading-zero) " · ";
  color: var(--noma-rule);
  font-variant-numeric: tabular-nums;
}
nav.noma-site-nav a {
  color: var(--noma-muted);
  text-decoration: none;
}
nav.noma-site-nav a:hover { color: var(--noma-accent); }
nav.noma-site-nav .noma-nav-current span {
  color: var(--noma-fg);
  font-weight: 500;
}

a.noma-ref.noma-xchapter::after {
  content: " ↗";
  font-size: 0.85em;
  color: var(--noma-muted);
}

main.noma-site-index {
  padding-top: 3rem;
}
header.noma-site-header h1 {
  font-size: 2.4rem;
  margin-bottom: 0.25rem;
}
header.noma-site-header .noma-site-author {
  color: var(--noma-muted);
  margin: 0 0 2rem;
}
ol.noma-site-toc {
  list-style: none;
  padding: 0;
  margin: 2rem 0;
  display: grid;
  gap: 0.6rem;
  counter-reset: toc;
}
ol.noma-site-toc li {
  counter-increment: toc;
}
a.noma-site-chapter {
  display: block;
  padding: 1.1rem 1.4rem;
  background: var(--noma-card-bg);
  border: 1px solid var(--noma-rule);
  border-radius: var(--noma-radius);
  text-decoration: none;
  color: inherit;
  transition: border-color 120ms ease, transform 120ms ease;
}
a.noma-site-chapter:hover {
  border-color: var(--noma-accent);
  transform: translateY(-1px);
}
a.noma-site-chapter::before {
  content: counter(toc, decimal-leading-zero);
  display: block;
  font-size: 0.75rem;
  font-variant-numeric: tabular-nums;
  color: var(--noma-muted);
  margin-bottom: 0.25rem;
}
.noma-site-chapter-title {
  display: block;
  font-weight: 600;
  font-size: 1.1rem;
}
.noma-site-chapter-summary {
  display: block;
  color: var(--noma-muted);
  margin-top: 0.4rem;
  font-size: 0.93rem;
}

/* v0.4 — math (KaTeX is loaded from CDN; we just style block layout) */
.noma-math-display {
  margin: 1.4em auto;
  text-align: center;
  overflow-x: auto;
}
.noma-math-inline {
  display: inline;
}