/* MetaChina — Yuanhua. Warm paper, deep teal, and explicit decision signals. */
:root {
  --paper: #F7F8F5;
  --sheet: #FFFFFF;
  --brand: #163C43;
  --ink: #183B42;
  --ink-soft: #5D7072;
  --accent: #147D78;
  --accent-hover: #106560;
  --accent-active: #0C514D;
  --accent-soft: #E6F2EE;
  --mint: #69D7C7;
  --line: #DCE5DF;
  --control-line: #7C9294;
  --surface-muted: #EDF2EE;
  --surface-hover: #E9EFEB;
  --surface-subtle: #F1F5F2;
  --success: #256751;
  --success-soft: #E8F3EE;
  --success-line: #8BB9A3;
  --warning: #946214;
  --warning-soft: #FBF2DB;
  --warning-line: #D8B66E;
  --danger: #B23B3B;
  --danger-soft: #FBEDEC;
  --danger-line: #DCAAAA;
  --neutral: #5D7072;
  --neutral-soft: #EEF2EF;
  --neutral-line: #A2B3AE;
  --on-dark: #F7F8F5;
  --on-dark-muted: #BED5D2;
  --overlay: rgba(22,60,67,.35);
  --focus-ring: color-mix(in srgb, var(--accent) 18%, transparent);
  --on-dark-line: color-mix(in srgb, var(--on-dark) 22%, transparent);
  --serif: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --sans: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: "SFMono-Regular", "Menlo", "Consolas", monospace;
  --pad: 1.25rem;
  --max: 78rem;
}
* { box-sizing: border-box; }
html { background: var(--paper); color: var(--ink); -webkit-font-smoothing: antialiased; scroll-behavior: smooth; scroll-padding-top: 6rem; }
body { margin: 0; font: 1rem/1.7 var(--sans); color: var(--ink); background: var(--paper); }
::selection { background: var(--accent); color: var(--sheet); }
a { color: var(--accent); text-underline-offset: .2em; }
a:hover { color: var(--accent-hover); }
a:active { color: var(--accent-active); }
button, input, select, textarea { font: inherit; }
button, a, input, select, textarea { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: .5; }
img, svg { max-width: 100%; }
img { height: auto; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
[hidden] { display: none !important; }
.mc { min-height: 100dvh; overflow: clip; }
.mc h1, .mc h2, .mc h3 { font-family: var(--serif); font-weight: 600; line-height: 1.25; letter-spacing: -.025em; text-wrap: balance; }
.mc h1 { margin: 0 0 1.5rem; font-size: clamp(2.5rem, 5.3vw, 4.75rem); }
.mc h2 { margin: 0 0 1.25rem; font-size: clamp(1.8rem, 3.3vw, 3rem); }
.mc h3 { margin: 0 0 .75rem; font-size: 1.4rem; }
.mc p { text-wrap: pretty; }
.mc main { min-height: 60vh; }
.wrap { width: min(var(--max), calc(100% - var(--pad) * 2)); margin-inline: auto; }
.sr { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip { position: fixed; left: 1rem; top: -6rem; z-index: 100; padding: .7rem 1rem; background: var(--ink); color: var(--sheet); border-radius: .2rem; }
.skip:focus { top: 1rem; }
.top { position: sticky; top: 0; z-index: 30; background: color-mix(in srgb, var(--paper) 95%, transparent); backdrop-filter: blur(16px); border-bottom: 1px solid var(--line); }
.top-inner { width: min(var(--max), calc(100% - var(--pad) * 2)); margin-inline: auto; min-height: 5rem; display: flex; align-items: center; gap: .75rem; }
.brand { display: grid; grid-template-columns: 2.25rem auto; gap: 0 .7rem; align-items: center; margin-right: auto; text-decoration: none; min-width: 0; color: var(--brand); }
.brand svg, .brand .brand-mark { grid-row: 1 / 3; width: 2.25rem; height: 2.25rem; }
.brand strong { font: 700 1.7rem/1.15 var(--serif); letter-spacing: .02em; white-space: nowrap; }
.brand span { font: .6rem/1.7 var(--mono); letter-spacing: .075em; white-space: nowrap; color: var(--ink-soft); }
.top-actions { display: flex; align-items: center; gap: .75rem; }
.nav-toggle { color: var(--ink); display: inline-flex; align-items: center; justify-content: center; min-height: 2.75rem; min-width: 2.75rem; padding: .5rem .7rem; border: 1px solid var(--control-line); background: transparent; border-radius: .2rem; }
.nav-toggle:hover { background: var(--surface-hover); border-color: var(--accent); color: var(--accent); }
.nav-toggle:active { background: var(--accent-soft); color: var(--accent-active); }
.nav { display: none; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; align-items: stretch; padding: .75rem var(--pad) 1.25rem; background: var(--paper); border-bottom: 1px solid var(--line); box-shadow: 0 1rem 2rem color-mix(in srgb, var(--brand) 5%, transparent); }
.nav.open { display: flex; }
.nav a { display: inline-flex; align-items: center; min-height: 2.75rem; padding: .65rem .85rem; border-bottom: 1px solid var(--line); text-decoration: none; color: var(--ink-soft); font-size: .875rem; transition: color .2s, background .2s; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--accent); background: var(--accent-soft); }
.nav a:active { color: var(--accent-active); }
.nav a[aria-current="page"]::before { content: ''; width: .35rem; height: .35rem; border-radius: 50%; background: var(--accent); margin-right: .45rem; }
.top-inner > .btn, .top-actions > .btn { display: none; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: .8rem; min-height: 3rem; padding: .75rem 1.25rem; border: 1px solid var(--control-line); border-radius: .2rem; background: transparent; color: var(--ink); font: 500 .9375rem/1.4 var(--sans); text-decoration: none; transition: background .2s, color .2s, border-color .2s, transform .2s; }
.btn:hover:not(:disabled) { background: var(--surface-hover); color: var(--accent-hover); border-color: var(--accent-hover); transform: translateY(-2px); }
.btn-primary { background: var(--accent); color: var(--sheet); border-color: var(--accent); }
.btn-primary:hover:not(:disabled) { background: var(--accent-hover); color: var(--sheet); border-color: var(--accent-hover); }
.btn-ink { background: var(--accent); color: var(--sheet); border-color: var(--accent); }
.btn-ink:hover:not(:disabled) { background: var(--accent-hover); color: var(--on-dark); border-color: var(--accent-hover); }
.btn:active:not(:disabled) { color: var(--accent-active); background: var(--accent-soft); border-color: var(--accent-active); transform: none; }
.btn-primary:active:not(:disabled), .btn-ink:active:not(:disabled) { background: var(--accent-active); color: var(--on-dark); border-color: var(--accent-active); }
.btn:focus-visible { border-color: var(--accent); }
.btn-primary:focus-visible, .btn-ink:focus-visible { outline-color: var(--accent); }
.btn svg { width: 1rem; height: 1rem; }
.inline-link { color: var(--accent); display: inline-flex; align-items: center; gap: .7rem; min-height: 2.75rem; font-weight: 500; text-decoration: none; }
.inline-link::after { content: '↗'; transition: transform .2s; }
.inline-link:hover::after { transform: translate(2px,-2px); }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: .75rem; }
.kicker, .eyebrow { display: flex; align-items: center; gap: .65rem; margin: 0 0 1.4rem; font: .75rem/1.5 var(--mono); color: var(--ink-soft); letter-spacing: .07em; text-transform: uppercase; }
.kicker::before, .eyebrow::before { content: ''; width: .45rem; height: .45rem; background: var(--accent); flex: 0 0 auto; }
.lede { max-width: 38rem; font-size: 1.0625rem; line-height: 1.85; color: var(--ink-soft); margin: 0 0 1.75rem; }
.meta { font-size: .875rem; color: var(--ink-soft); }
.muted { color: var(--ink-soft); }
.num { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.tag, .chip { display: inline-flex; align-items: center; gap: .4rem; padding: .25rem .6rem; border: 1px solid var(--line); border-radius: 2px; background: var(--sheet); color: var(--ink-soft); font: .75rem/1.5 var(--sans); }
.chip::before { content: ''; width: .35rem; height: .35rem; border-radius: 50%; background: currentColor; }
.hero, .page-hero { padding: 3.5rem 0; position: relative; }
.hero-grid { display: grid; gap: 2.5rem; }
.page-hero { border-bottom: 1px solid var(--line); }
.page-hero .prose { max-width: 52rem; }
.page-number { font: .75rem/1.6 var(--mono); color: var(--ink-soft); letter-spacing: .08em; margin: 0 0 1.5rem; }
.page-number::after { content: ''; display: inline-block; vertical-align: middle; margin-left: 1rem; width: 3rem; height: 1px; background: var(--line); }
.section { padding: 3.5rem 0; border-top: 1px solid var(--line); }
.page-hero + .section { border-top: 0; }
.section-quiet { padding-block: 2.5rem; }
.section-heading { display: grid; gap: .75rem; margin-bottom: 2rem; }
.section-heading h2 { margin-bottom: .75rem; }
.section-heading p { margin-top: 0; max-width: 38rem; }
.section-label { font: .75rem/1.6 var(--mono); letter-spacing: .06em; color: var(--ink-soft); text-transform: uppercase; }
.section-label::first-letter { color: var(--accent); }
.split, .trio, .editorial-grid, .metric-grid { display: grid; gap: 1.25rem; min-width: 0; }
.split > *, .trio > *, .editorial-grid > * { min-width: 0; }
.sheet { background: var(--sheet); border: 1px solid var(--line); border-radius: .25rem; padding: 1.5rem; }
.sheet p:last-child { margin-bottom: 0; }
.sheet p { color: var(--ink-soft); margin: 0 0 1rem; }
.sample { background: var(--sheet); border: 1px solid var(--line); border-top: 3px solid var(--accent); padding: 1.5rem; }
.sample dt { font: 600 1.05rem var(--serif); margin-top: 1.15rem; }
.sample dd { margin: .4rem 0 0; color: var(--ink-soft); }
.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 1.5rem; }
.steps li { border-top: 1px solid var(--ink); padding: 1.5rem 0; }
.steps p { color: var(--ink-soft); }
.step-no { font: .875rem/1 var(--mono); color: var(--accent) !important; margin: 0 0 1.5rem; }
.feature-row { display: grid; grid-template-columns: 2.2rem 1fr; gap: 1rem; padding: 1.75rem 0; border-bottom: 1px solid var(--line); }
.feature-index { color: var(--accent); font: .875rem/1.7 var(--mono); }
.feature-body { min-width: 0; }
.feature-body p { margin-top: 0; color: var(--ink-soft); max-width: 46rem; }
.feature-body p:last-child { margin-bottom: 0; }
.flow-track { list-style: none; display: grid; gap: 0; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.flow-track li { padding: 1.5rem 0; border-bottom: 1px solid var(--line); }
.flow-track li > span:first-child { color: var(--accent); font-family: var(--mono); }
.flow-track p { color: var(--ink-soft); }
.capability-list { list-style: none; margin: 1.5rem 0 0; padding: 0; }
.capability-list li { display: flex; gap: .85rem; align-items: baseline; padding: .85rem 0; border-top: 1px solid var(--line); }
.capability-list li::before { content: '+'; color: var(--accent); font-family: var(--mono); }
.roadmap { list-style: none; margin: 0; padding: 0; }
.roadmap li { display: grid; gap: .5rem; padding: 1rem 0; border-top: 1px solid var(--line); }
.roadmap .tag { width: fit-content; }
.roadmap-quiet { display: flex; flex-wrap: wrap; gap: .75rem 1.5rem; }
.roadmap-quiet li { display: flex; align-items: center; gap: .5rem; border: 0; padding: 0; }
.price-rows { border-top: 1px solid var(--ink); margin: 1.25rem 0; padding: .25rem 0; }
.price-line { display: flex; justify-content: space-between; gap: 1rem; padding: 1rem 0; border-bottom: 1px solid var(--line); margin: 0; }
.price-line span:last-child { text-align: right; min-width: 0; overflow-wrap: anywhere; }
.price-line .num { font-size: .875rem; }
.quote-block { border-left: 3px solid var(--accent); padding: 1rem 1.5rem; margin: 1.5rem 0; background: var(--sheet); }
.quote-block p { margin: 0; font-family: var(--serif); font-size: 1.3rem; }
.stat { font: 2.2rem/1.3 var(--serif); }
.stat small { display: block; font: .875rem/1.5 var(--sans); color: var(--ink-soft); margin-top: .65rem; }
.note { padding: 1rem 1.15rem; margin: 1.25rem 0; border-left: 3px solid var(--accent); background: var(--accent-soft); color: var(--ink); font-size: .9375rem; }
.alert { padding: 1rem 1.15rem; border: 1px solid var(--danger-line); border-left: 3px solid var(--danger); background: var(--danger-soft); margin: 1.25rem 0; border-radius: 2px; }
.alert p { margin: 0 0 .5rem; }
.alert p:last-child { margin-bottom: 0; }
.alert details { margin-top: .75rem; }
.prose { max-width: 68ch; }
.prose p { margin: 0 0 1.25rem; }
.prose ul, .prose ol { padding-left: 1.2rem; margin: 0 0 1.5rem; }
.prose li { padding-block: .3rem; }
.prose h2 { margin-top: 2.5rem; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { margin-top: 1.75rem; }
.legal-layout { display: grid; gap: 2rem; }
.legal-toc { border-top: 1px solid var(--ink); padding-top: 1.25rem; }
.legal-toc nav, .legal-toc ul { display: flex; flex-direction: column; list-style: none; padding: 0; }
.legal-toc a { display: block; text-decoration: none; min-height: 2.75rem; padding: .55rem 0; color: var(--ink-soft); border-bottom: 1px solid var(--line); }
.legal-toc a:hover { color: var(--accent); }
.form-panel { padding: 1.5rem; background: var(--sheet); border: 1px solid var(--line); border-top: 3px solid var(--accent); border-radius: .25rem; }
.field { display: flex; flex-direction: column; gap: .5rem; margin: 0 0 1.25rem; min-width: 0; }
.field label { font-weight: 500; font-size: .9375rem; }
.mc input, .mc textarea, .mc select { width: 100%; min-height: 3rem; padding: .7rem .85rem; font: 1rem/1.5 var(--sans); background: var(--sheet); color: var(--ink); border: 1px solid var(--control-line); border-radius: .2rem; transition: border-color .2s, box-shadow .2s, background .2s; }
.mc input:focus, .mc textarea:focus, .mc select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--focus-ring); }
.mc input::placeholder, .mc textarea::placeholder { color: var(--ink-soft); opacity: 1; }
.mc input:hover:not(:disabled):not(:focus):not([aria-invalid="true"]), .mc textarea:hover:not(:disabled):not(:focus):not([aria-invalid="true"]), .mc select:hover:not(:disabled):not(:focus):not([aria-invalid="true"]) { border-color: var(--accent); }
.mc input[aria-invalid="true"], .mc textarea[aria-invalid="true"], .mc select[aria-invalid="true"] { border-color: var(--danger); }
.mc input[aria-invalid="true"]:focus, .mc textarea[aria-invalid="true"]:focus, .mc select[aria-invalid="true"]:focus { box-shadow: 0 0 0 3px color-mix(in srgb, var(--danger) 18%, transparent); }
.mc input:disabled, .mc textarea:disabled, .mc select:disabled, .mc input[readonly], .mc textarea[readonly] { background: var(--surface-muted); color: var(--ink-soft); }
.mc input:disabled, .mc textarea:disabled, .mc select:disabled { cursor: not-allowed; }
.mc textarea { min-height: 9rem; resize: vertical; }
.mc input[type="checkbox"], .mc input[type="radio"] { width: 1.1rem; min-height: 1.1rem; accent-color: var(--accent); }
.field-error { color: var(--danger); margin: 0; font-size: .875rem; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; vertical-align: top; padding: 1rem .75rem; border-bottom: 1px solid var(--line); }
th { font-size: .875rem; color: var(--ink-soft); font-weight: 500; }
pre.json, .terminal, .code-panel { background: var(--brand); color: var(--on-dark); padding: 1.5rem; border-radius: .25rem; font: .8125rem/1.85 var(--mono); white-space: pre-wrap; overflow-wrap: anywhere; overflow-x: auto; }
code { font-family: var(--mono); font-size: .875em; overflow-wrap: anywhere; }
.terminal .muted { color: var(--on-dark-muted); }
.terminal .accent { color: var(--on-dark); }
.index-card ol { list-style: none; margin: 0; padding: 0; }
.index-card a { display: flex; justify-content: space-between; gap: 1rem; min-height: 3rem; align-items: center; border-top: 1px solid var(--line); text-decoration: none; }
summary { min-height: 2.75rem; padding-block: .75rem; cursor: pointer; font-size: .9375rem; }
details { border-bottom: 1px solid var(--line); }
.footer { background: var(--brand); color: var(--on-dark); padding: 3rem 0 1.5rem; }
.footer .brand span, .footer .muted, .footer .meta { color: var(--on-dark-muted); }
.footer-main { display: grid; gap: 2rem; padding-bottom: 2.5rem; }
.footer-main h2 { font-size: 2rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: .3rem 1.5rem; }
.footer a { min-height: 2.75rem; display: inline-flex; align-items: center; text-decoration: none; }
.footer a, .footer .brand { color: var(--on-dark); }
.footer a:hover { color: var(--on-dark); text-decoration: underline; }
.footer a:focus-visible, .path-panel-dark a:focus-visible { outline-color: var(--on-dark); }
.footer-grid { display: flex; flex-wrap: wrap; gap: .75rem 1.5rem; align-items: center; }
.footer-grid > span { flex-basis: 100%; }
.footer-bottom { padding-top: 1.25rem; border-top: 1px solid var(--on-dark-line); display: flex; flex-wrap: wrap; justify-content: space-between; gap: .5rem 1rem; font: .75rem/1.6 var(--mono); color: var(--on-dark-muted); }
/* Homepage: an editorial opening and an annotated decision dossier. */
.home-hero { padding: 3rem 0 2.5rem; }
.home-hero .kicker { margin-bottom: 2rem; }
.home-hero h1 { font-size: clamp(2.8rem, 6.25vw, 6rem); line-height: 1.17; letter-spacing: -.055em; margin-bottom: 1.75rem; }
.home-hero h1 em { font-style: normal; color: var(--accent); }
.home-hero .lede { max-width: 30rem; }
.hero-footnote { display: flex; flex-wrap: wrap; gap: .5rem 1.25rem; margin-top: 2rem; font-size: .875rem; color: var(--ink-soft); }
.hero-footnote span { display: flex; align-items: center; gap: .4rem; }
.hero-footnote span::before { content: '↳'; color: var(--accent); font-family: var(--mono); }
.status-line { display: inline-flex; align-items: center; gap: .5rem; font-size: .8125rem; color: var(--ink-soft); }
.status-line::before { content: ''; width: .4rem; height: .4rem; border-radius: 50%; background: var(--neutral); }
.decision-exhibit { position: relative; padding: 1.25rem; background-color: var(--brand); background-image: linear-gradient(color-mix(in srgb, var(--on-dark) 4%, transparent) 1px,transparent 1px), linear-gradient(90deg,color-mix(in srgb, var(--on-dark) 4%, transparent) 1px,transparent 1px); background-size: 2rem 2rem; border-radius: .3rem; }
.exhibit-heading { display: flex; justify-content: space-between; gap: 1rem; margin-bottom: 1.25rem; color: var(--on-dark-muted); font: .625rem/1.5 var(--mono); letter-spacing: .08em; }
.dossier { position: relative; background: var(--sheet); padding: 1.5rem; box-shadow: .4rem .4rem 0 color-mix(in srgb, var(--sheet) 10%, transparent); }
.dossier-top { display: flex; justify-content: space-between; align-items: center; gap: 1rem; border-bottom: 1px solid var(--line); padding-bottom: 1rem; }
.dossier-top .num { font-size: .625rem; color: var(--ink-soft); letter-spacing: .04em; }
.dossier-top span:last-child { background: var(--accent-soft); color: var(--accent-active); font-size: .625rem; padding: .2rem .45rem; }
.dossier h2 { font-size: clamp(1.7rem, 2.5vw, 2.4rem); margin: 1.25rem 0 1.5rem; }
.dossier-options { display: flex; flex-wrap: wrap; gap: .4rem; margin: 0 0 1.5rem; }
.dossier-options span { padding: .4rem .65rem; border: 1px solid var(--line); color: var(--ink-soft); font-size: .75rem; }
.dossier-options .selected { color: var(--accent-active); border-color: var(--accent); background: var(--accent-soft); }
.dossier-label { display: flex; align-items: center; gap: .5rem; margin: 0 0 .5rem; font: .625rem/1.5 var(--mono); color: var(--ink-soft); }
.dossier-label::before { content: ''; width: .3rem; height: .3rem; background: var(--accent); }
.dossier p { font-size: .8125rem; margin: 0 0 1rem; }
.dossier-divider { border: 0; border-top: 1px solid var(--line); margin: 1rem 0; }
.dossier-bottom { display: flex; justify-content: space-between; align-items: center; margin-top: 1.5rem; padding-top: .8rem; border-top: 1px solid var(--line); color: var(--ink-soft); font-size: .625rem; }
.exhibit-note { display: flex; justify-content: space-between; gap: 1rem; margin: 1.25rem 0 0; color: var(--on-dark-muted); font: .6875rem/1.5 var(--mono); }
.signal-strip { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.signal-strip .wrap { display: grid; grid-template-columns: 1fr 1fr; }
.signal-item { display: flex; flex-direction: column; padding: 1.2rem .5rem; gap: .3rem; border-right: 1px solid var(--line); }
.signal-item:nth-child(even) { border-right: 0; }
.signal-item strong { font: 500 .9375rem/1.5 var(--sans); }
.signal-item span { font: .625rem/1.5 var(--mono); letter-spacing: .05em; color: var(--ink-soft); }
.home-paths { display: grid; gap: 1.5rem; }
.path-panel { display: grid; padding: 1.75rem; border: 1px solid var(--line); border-radius: .25rem; background: var(--sheet); }
.path-panel .eyebrow { margin-bottom: 2rem; }
.path-panel h3 { font-size: 2rem; }
.path-panel p { max-width: 30rem; color: var(--ink-soft); }
.path-panel-dark { background: var(--brand); color: var(--on-dark); border-color: var(--brand); }
.path-panel-dark p, .path-panel-dark .eyebrow { color: var(--on-dark-muted); }
.path-panel .inline-link { margin-top: 1rem; justify-self: start; border-bottom: 1px solid var(--line); }
.path-panel-dark .inline-link { color: var(--on-dark); border-color: var(--on-dark-line); }
.path-panel-dark .inline-link:hover { color: var(--on-dark); border-color: var(--on-dark); }
.path-panel-dark .path-formula i { color: var(--on-dark-muted); }
.path-formula { display: flex; align-items: center; flex-wrap: wrap; gap: .5rem; margin: 1.5rem 0; }
.path-formula span { font: .75rem/1.4 var(--mono); border: 1px solid var(--line); padding: .5rem .75rem; }
.path-panel-dark .path-formula span { border-color: var(--on-dark-line); }
.path-formula i { color: var(--accent); font-style: normal; }
.home-workflow { margin-top: 2rem; }
.home-workflow .steps li { padding-top: 1.5rem; }
.home-workflow .step-no { font-size: 2.25rem; font-weight: 400; }
.home-workflow h3 { font-size: 1.5rem; }
.home-manifesto { display: grid; gap: 2rem; }
.home-manifesto h2 { font-size: clamp(2rem, 3.4vw, 3.5rem); }
.home-manifesto .feature-row:first-child { padding-top: 0; }
.cta-band { padding: 3rem 0; background: var(--accent-soft); border-top: 1px solid var(--line); }
.cta-inner { display: flex; flex-direction: column; gap: 1.5rem; }
.cta-inner h2 { margin-bottom: .75rem; }
.cta-inner p { margin: 0; color: var(--ink-soft); }
.cta-inner .btn { align-self: flex-start; }
.future-list { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1.5rem; }
.future-list span, .future-list a { color: var(--ink-soft); font-size: .8125rem; padding: .4rem .6rem; border: 1px solid var(--line); }
.future-list a { text-decoration: none; }
.future-list a:hover { color: var(--accent); border-color: var(--accent); }
.two-col { display: grid; gap: 1.5rem; }
.capability-list li > a { display: grid; gap: .35rem; text-decoration: none; }
.capability-list li > a:hover strong { color: var(--accent); }
@media (min-width: 768px) { .two-col { grid-template-columns: repeat(2, minmax(0,1fr)); } }
.motion-ready [data-reveal] { opacity: 0; transform: translateY(1.25rem); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.7,.2,1); }
.motion-ready [data-reveal].is-visible { opacity: 1; transform: none; }
@media (min-width: 640px) {
  :root { --pad: 2rem; }
  .top-inner > .btn, .top-actions > .btn { display: inline-flex; font-size: .8125rem; min-height: 2.75rem; }
  .signal-strip .wrap { grid-template-columns: repeat(4,1fr); }
  .signal-item:nth-child(even) { border-right: 1px solid var(--line); }
  .signal-item:last-child { border-right: 0; }
  .signal-item { padding: 1.5rem 1rem; }
  .trio, .metric-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .form-panel, .sheet { padding: 2rem; }
  .decision-exhibit { padding: 2rem; }
  .dossier { padding: 2rem; }
  .dossier-options span { font-size: .8125rem; }
  .roadmap li { grid-template-columns: 6rem 1fr; align-items: baseline; }
}
@media (min-width: 768px) {
  .hero, .page-hero { padding: 5rem 0; }
  .section { padding: 5rem 0; }
  .section-quiet { padding-block: 3rem; }
  .split { grid-template-columns: minmax(0,1.15fr) minmax(0,.85fr); align-items: start; gap: 3rem; }
  .editorial-grid { grid-template-columns: 1fr 1fr; gap: 2.5rem; }
  .section-heading { grid-template-columns: minmax(0,.65fr) minmax(0,1.35fr); gap: 2rem; }
  .section-heading .section-label { padding-top: .4rem; }
  .section-heading > h2 { grid-column: 2; }
  .section-heading > p { grid-column: 2; }
  .section-heading > div { grid-column: 2; }
  .section-heading > h2 + p { margin-top: -1rem; }
  .home-paths { grid-template-columns: 1fr 1fr; }
  .path-panel { padding: 2.5rem; }
  .legal-layout { grid-template-columns: 13rem minmax(0,1fr); gap: 3rem; }
  .legal-toc { position: sticky; top: 7rem; align-self: start; }
  .footer-main { grid-template-columns: 1.1fr 1fr; gap: 3rem; align-items: start; }
  .footer-links { justify-content: flex-end; }
  .footer-grid > span { flex-basis: auto; margin-right: auto; }
  .cta-inner { flex-direction: row; align-items: center; justify-content: space-between; gap: 3rem; }
  .cta-inner .btn { flex: 0 0 auto; align-self: center; }
}
@media (min-width: 1024px) {
  :root { --pad: 2.5rem; }
  .top-inner { min-height: 5.5rem; gap: 1.5rem; }
  .nav-toggle { display: none; }
  .nav { position: static; display: flex; flex-direction: row; gap: .25rem; padding: 0; background: none; border: 0; box-shadow: none; }
  .nav a { border: 0; padding: .6rem .8rem; }
  .hero-grid { grid-template-columns: minmax(0,1.15fr) minmax(0,.85fr); gap: 4rem; align-items: center; }
  .home-hero { padding: 4.5rem 0 4rem; }
  .home-hero .hero-grid { grid-template-columns: minmax(0,1.05fr) minmax(0,.9fr); }
  .home-hero h1 { font-size: clamp(4rem, 6vw, 6rem); }
  .home-hero .kicker { margin-bottom: 2.75rem; }
  .trio { grid-template-columns: repeat(3,minmax(0,1fr)); }
  .steps { grid-template-columns: repeat(3,minmax(0,1fr)); gap: 2.5rem; }
  .flow-track { grid-template-columns: repeat(4,minmax(0,1fr)); border-bottom: 1px solid var(--line); }
  .flow-track li { padding: 1.5rem; border-right: 1px solid var(--line); border-bottom: 0; }
  .flow-track li:first-child { padding-left: 0; }
  .flow-track li:last-child { border-right: 0; }
  .home-manifesto { grid-template-columns: 1fr 1fr; gap: 5rem; }
  .exhibit-heading { font-size: .6875rem; }
  .dossier p { font-size: .875rem; }
  .dossier-top .num, .dossier-top span:last-child, .dossier-label, .dossier-bottom { font-size: .6875rem; }
  .signal-item { padding: 1.5rem 2rem; }
  .signal-item:first-child { padding-left: 0; }
}
@media (min-width: 1440px) {
  :root { --pad: 3rem; }
  .hero-grid { gap: 5rem; }
  .decision-exhibit { padding: 2.5rem; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .mc *, .mc *::before, .mc *::after { animation: none !important; transition: none !important; }
  .motion-ready [data-reveal] { opacity: 1; transform: none; }
}
/* Diagram and editorial details shared by product and scenario pages. */
.decision-diagram { background: var(--sheet); border: 1px solid var(--line); padding: 1.5rem; border-radius: .25rem; }
.decision-diagram > .eyebrow { padding-bottom: 1rem; border-bottom: 1px solid var(--line); }
.diagram-input { text-align: center; padding: 1rem 0; }
.diagram-input h3 { margin: .9rem 0 .4rem; font-size: 1.2rem; }
.diagram-input p { margin: 0; }
.diagram-axis { text-align: center; font: 1.5rem/1.5 var(--mono); color: var(--accent); margin-block: .5rem; }
.decision-diagram .metric-grid { grid-template-columns: repeat(2,minmax(0,1fr)); gap: .75rem; }
.decision-diagram .metric-grid > div { padding: 1rem; border: 1px solid var(--line); background: var(--paper); }
.decision-diagram .metric-grid .eyebrow { margin-bottom: .5rem; }
.decision-diagram .metric-grid strong { font: 500 1.25rem/1.4 var(--serif); }
.decision-diagram > .meta { text-align: center; }
.sheet dl { margin: 1.5rem 0 0; }
.sheet dt { border-top: 1px solid var(--line); padding-top: 1rem; margin-bottom: .4rem; font-size: .875rem; color: var(--ink); }
.sheet dd { margin: 0 0 1rem; color: var(--ink-soft); font-size: .9375rem; }
.capability-list li { flex-wrap: wrap; }
.capability-list li strong { min-width: 7rem; }
.capability-list li span { color: var(--ink-soft); }
.footer-bottom > div { display: flex; gap: 1.25rem; }
@media (min-width: 768px) { .decision-diagram { padding: 2rem; } }
.nav .nav-workspace { color: var(--accent); font-weight: 500; }
@media (min-width: 1024px) { .nav .nav-workspace { display: none; } }
.inline-link[href^="#"]::after { content: '↓'; }
.trio > .sheet > .page-number { display: block; font: 2.5rem/1.3 var(--serif); color: var(--accent); margin-block: 1rem; }
.trio > .sheet > .page-number::after { display: none; }
#api-reference .table-wrap { overscroll-behavior-inline: contain; }
#api-reference table { min-width: 48rem; }
#api-reference th:first-child, #api-reference td:first-child { white-space: nowrap; font: .8125rem/1.8 var(--mono); width: 6rem; }
#api-reference th:nth-child(2) { width: 42%; }
#api-reference td:nth-child(2) code { white-space: nowrap; overflow-wrap: normal; }
@media (min-width: 1024px) { .table-hint { display: none; } }