/* AI Front Desk Partners — private preview stylesheet.
   Base layer: shared tokens and homepage components. Extension layer: interior pages. */

/* ============ BASE LAYER ============ */

:root {
  --paper: #f4f0e6;
  --paper-deep: #ece7d8;
  --ink: #1c241e;
  --green: #10291d;
  --green-ink: #eef0e2;
  --muted: #5c5a4e;
  --muted-inverse: #b9c2ae;
  --line: rgba(28, 36, 30, 0.22);
  --accent: #a63a12;
  --accent-ink: #fdf6ec;
  --display: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Georgia, serif;
  --body: "Aptos", "Segoe UI", system-ui, -apple-system, sans-serif;
  --measure: 34rem;
  --gutter: clamp(1.25rem, 5vw, 5rem);
  --section-y: clamp(4rem, 9vw, 8.5rem);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1, h2 {
  text-wrap: balance;
  font-family: var(--display);
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1.02;
  margin: 0 0 1.1rem;
}
h3 { font-family: var(--body); font-size: 1.02rem; font-weight: 700; letter-spacing: -0.01em; margin: 0 0 0.35rem; }
p { margin: 0 0 1rem; }
p:last-child { margin-bottom: 0; }

.kicker {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green);
  margin: 0 0 1.4rem;
}
.kicker--inverse { color: var(--muted-inverse); }

/* ---------- chrome ---------- */

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 30;
  background: var(--ink); color: var(--paper); padding: 0.6rem 1rem; font-weight: 700;
}
.skip-link:focus { left: 0.5rem; top: 0.5rem; }

.private-banner {
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  background: var(--ink); color: var(--paper);
  font-size: 0.68rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase;
  padding: 0.45rem var(--gutter);
}

.site-header {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 2rem;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
  padding: 0.7rem var(--gutter);
}
.brand { display: inline-flex; align-items: center; gap: 0.6rem; color: inherit; text-decoration: none; font-weight: 800; font-size: 0.95rem; }
.brand-mark {
  display: inline-grid; place-items: center; width: 1.9rem; height: 1.9rem;
  background: var(--green); color: var(--green-ink); font-size: 0.7rem; font-weight: 800;
}
.site-nav { display: flex; gap: 1.3rem; margin-left: auto; }
.site-nav a { color: var(--muted); text-decoration: none; font-size: 0.85rem; font-weight: 600; }
.site-nav a:hover, .site-nav a:focus-visible { color: var(--ink); text-decoration: underline; text-underline-offset: 4px; }
.site-nav a[aria-current="page"] { color: var(--ink); font-weight: 800; text-decoration: underline; text-underline-offset: 4px; }
.header-action {
  display: inline-flex; align-items: center; gap: 0.35rem; min-height: 2.75rem;
  border: 1px solid var(--ink); background: transparent; color: var(--ink); text-decoration: none;
  font: 700 0.8rem/1 var(--body); padding: 0.55rem 0.9rem; cursor: pointer; white-space: nowrap;
}
.header-action:hover, .header-action:focus-visible { background: var(--ink); color: var(--paper); }

:focus-visible { outline: 2px solid var(--green); outline-offset: 3px; }

/* ---------- hero ---------- */

.hero {
  display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: clamp(2rem, 5vw, 4.5rem); align-items: center;
  padding: clamp(3.5rem, 8vw, 7rem) var(--gutter);
  background-image: repeating-linear-gradient(0deg, transparent 0 27px, rgba(28,36,30,0.05) 27px 28px),
                    repeating-linear-gradient(90deg, transparent 0 27px, rgba(28,36,30,0.05) 27px 28px);
}
.hero h1 { font-size: clamp(2.9rem, 6.2vw, 5.2rem); max-width: 11em; }
.hero h1 em { font-style: italic; color: var(--green); }
.hero-lede { max-width: var(--measure); color: var(--muted); font-size: 1.1rem; }
.hero-actions { display: flex; align-items: center; gap: 1.5rem; flex-wrap: wrap; margin-top: 1.8rem; }

.primary-action {
  display: inline-flex; flex-direction: column; align-items: flex-start; gap: 0.15rem;
  background: var(--accent); color: var(--accent-ink); border: 0; cursor: pointer;
  padding: 0.85rem 1.3rem; font-family: var(--body); text-align: left; text-decoration: none;
  box-shadow: 0.3rem 0.3rem 0 var(--ink);
}
.primary-action span { font-size: 1rem; font-weight: 800; }
.primary-action small { font-size: 0.68rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; opacity: 0.9; }
.primary-action:hover, .primary-action:focus-visible { transform: translate(1px, 1px); box-shadow: 0.2rem 0.2rem 0 var(--ink); }
@media (prefers-reduced-motion: reduce) { .primary-action:hover { transform: none; } }

.text-link { color: var(--ink); font-weight: 700; font-size: 0.95rem; text-underline-offset: 4px; }

/* ---------- relay board (the one moving piece) ---------- */

.relay-board {
  position: relative; margin: 0; aspect-ratio: 520 / 320;
  background: var(--paper-deep);
  border: 1px solid var(--line);
  box-shadow: 0.45rem 0.45rem 0 rgba(28, 36, 30, 0.12);
}
.board-tag {
  position: absolute; top: 0.7rem; left: 0.8rem; z-index: 2;
  font-size: 0.62rem; font-weight: 800; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted);
}
.relay-svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.relay-path { stroke: var(--green); stroke-width: 2; stroke-dasharray: 7 6; opacity: 0.85; }
.relay-pulse {
  fill: var(--accent);
  offset-path: path("M46 220 C 140 220, 170 150, 260 150 C 350 150, 380 80, 474 80");
  animation: pulse-travel 7s cubic-bezier(0.45, 0, 0.4, 1) infinite;
}
@keyframes pulse-travel {
  0%   { offset-distance: 0%;   opacity: 0; }
  6%   { opacity: 1; }
  46%  { offset-distance: 50%; }
  54%  { offset-distance: 50%; }
  94%  { opacity: 1; }
  100% { offset-distance: 100%; opacity: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .relay-pulse { animation: none; offset-distance: 100%; opacity: 1; }
}

.relay-node {
  position: absolute; left: 50%; top: 46.9%; transform: translate(-50%, -50%);
  display: grid; place-content: center; justify-items: center; gap: 0.15rem;
  width: 6.9rem; height: 6.9rem; border-radius: 50%; padding: 0.4rem;
  background: var(--green); color: var(--green-ink); text-align: center;
  outline: 6px solid color-mix(in srgb, var(--green) 20%, transparent);
}
.relay-node b { font-family: var(--display); font-size: 1.7rem; line-height: 1; }
.relay-node small { font-size: 0.52rem; font-weight: 700; letter-spacing: 0.07em; text-transform: uppercase; line-height: 1.3; max-width: 5rem; }

.relay-label {
  position: absolute; font-size: 0.72rem; font-weight: 800; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink);
}
.relay-label span { display: block; font-family: var(--display); font-size: 1.6rem; letter-spacing: 0; color: var(--green); }
.relay-label--in { left: 4%; bottom: 14%; }
.relay-label--out { right: 3%; top: 6%; text-align: right; max-width: 9.5rem; }

.relay-branch {
  position: absolute; padding: 0.36rem 0.55rem;
  border: 1px solid var(--line); background: var(--paper);
  font-size: 0.64rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink);
}
.relay-branch::before { content: ""; display: inline-block; width: 7px; height: 7px; background: var(--green); margin-right: 0.4rem; }
.relay-branch--a { top: 16%; left: 9%; }
.relay-branch--b { bottom: 42%; right: 5%; }
.relay-branch--c { bottom: 10%; left: 46%; }

/* ---------- shared section shell ---------- */

.section { padding: var(--section-y) var(--gutter); border-top: 1px solid var(--line); }
.section-heading { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr); gap: 2.5rem; align-items: start; margin-bottom: 3rem; }
.section-heading h2 { font-size: clamp(2rem, 4vw, 3.2rem); }
.section-heading p { color: var(--muted); max-width: var(--measure); padding-top: 0.5rem; }

[data-reveal] { opacity: 1; transform: none; }
.js [data-reveal] { opacity: 0; transform: translateY(14px); transition: opacity 0.55s ease, transform 0.55s ease; }
.js [data-reveal].is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .js [data-reveal] { opacity: 1; transform: none; transition: none; }
}

/* ---------- mechanism ---------- */

.mechanism-steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 2rem; }
.mechanism-steps li { border-top: 2px solid var(--ink); padding-top: 1.1rem; display: grid; grid-template-columns: auto 1fr; gap: 0.9rem; align-items: start; }
.mechanism-steps li > span { font: 500 1.9rem/1 var(--display); color: var(--green); }
.mechanism-steps p { color: var(--muted); font-size: 0.95rem; }

/* ---------- call sheet ---------- */

.call-sheet {
  position: relative; background: var(--paper-deep); border: 1px solid var(--line);
  padding: clamp(1.4rem, 3vw, 2.4rem); box-shadow: 0.45rem 0.45rem 0 rgba(28, 36, 30, 0.12);
}
.fiction-stamp {
  position: absolute; top: 0.9rem; right: 1rem; transform: rotate(3deg);
  border: 2px solid var(--accent); color: var(--accent); background: var(--paper);
  font-size: 0.72rem; font-weight: 800; letter-spacing: 0.1em; text-transform: uppercase;
  text-align: center; line-height: 1.3; padding: 0.45rem 0.7rem;
}
.fiction-stamp small { display: block; font-size: 0.56rem; letter-spacing: 0.06em; font-weight: 700; }
.call-meta { padding-right: 11.5rem; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.09em; text-transform: uppercase; color: var(--muted); margin-bottom: 1.4rem; }
.call-lines { margin: 0; display: grid; gap: 1rem; }
.call-lines .line { display: grid; grid-template-columns: 6.2rem 1fr; gap: 1rem; align-items: start; }
.call-lines dt { font-size: 0.68rem; font-weight: 800; letter-spacing: 0.09em; text-transform: uppercase; color: var(--muted); padding-top: 0.45rem; }
.call-lines dd { margin: 0; padding: 0.55rem 0.9rem; font-size: 0.98rem; }
.line--caller dd { background: var(--paper); border: 1px solid var(--line); }
.line--desk dd { background: var(--green); color: var(--green-ink); }
.line--system dd { border-left: 2px solid var(--green); color: var(--muted); font-size: 0.92rem; }
.line--limit dd { border: 1px dashed var(--green); color: var(--ink); font-size: 0.92rem; }
.line--limit dt { color: var(--green); }

/* ---------- boundary ---------- */

.boundary { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr); gap: clamp(2rem, 5vw, 4.5rem); background: var(--green); color: var(--green-ink); }
.boundary-quote { font: 500 clamp(2rem, 3.8vw, 3.4rem)/1.12 var(--display); letter-spacing: -0.03em; margin: 0; }
.boundary-copy p { color: var(--muted-inverse); }
.boundary-copy h2 { color: var(--green-ink); font-size: clamp(1.9rem, 3.4vw, 2.8rem); }
.boundary-copy .kicker { color: var(--muted-inverse); }
.boundary-list { list-style: none; margin: 1.4rem 0 0; padding: 0; display: grid; gap: 0.7rem; }
.boundary-list li { border-top: 1px solid rgba(238, 240, 226, 0.25); padding-top: 0.7rem; font-size: 0.95rem; font-weight: 600; }
.owner-slot { display: grid; grid-template-columns: auto 1fr; gap: 1.1rem; align-items: center; margin-top: 2.4rem; border: 1px solid rgba(238, 240, 226, 0.3); padding: 1.1rem; }
.owner-slot p { margin: 0; font-size: 0.9rem; color: var(--muted-inverse); }
.owner-slot strong { color: var(--green-ink); }
.owner-frame { width: 4.2rem; height: 4.2rem; border: 1px solid rgba(238, 240, 226, 0.45); background: repeating-linear-gradient(45deg, transparent 0 6px, rgba(238, 240, 226, 0.14) 6px 7px); }
.handoff-paths { margin: 2.4rem 0 0; display: grid; gap: 0.9rem; border: 1px solid rgba(238, 240, 226, 0.3); padding: 1.1rem; }
.handoff-paths > div { border-top: 1px solid rgba(238, 240, 226, 0.25); padding-top: 0.8rem; }
.handoff-paths > div:first-child { border-top: 0; padding-top: 0; }
.handoff-paths dt { font-weight: 600; font-size: 0.95rem; color: var(--green-ink); margin: 0 0 0.3rem; }
.handoff-paths dd { margin: 0; font-size: 0.9rem; color: var(--muted-inverse); }

/* ---------- situations ---------- */

.situation-picker { border: 1px solid var(--line); background: var(--paper-deep); }
.situation-tabs { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-bottom: 1px solid var(--line); }
.situation-tabs [role="tab"] {
  display: flex; align-items: flex-start;
  border: 0; border-right: 1px solid var(--line); background: transparent; cursor: pointer;
  font: 600 0.85rem/1.35 var(--body); color: var(--muted); text-align: left; padding: 1rem 1.1rem;
  hyphens: none; overflow-wrap: normal;
}
.situation-tabs [role="tab"]:last-child { border-right: 0; }
.situation-tabs [role="tab"][aria-selected="true"] { background: var(--paper); color: var(--ink); font-weight: 800; box-shadow: inset 0 -3px 0 var(--green); }
.situation-panels { padding: clamp(1.4rem, 3vw, 2.2rem); background: var(--paper); }
.panel-lens { font-family: var(--display); font-size: clamp(1.65rem, 3vw, 2.3rem); font-weight: 500; letter-spacing: -0.02em; margin-bottom: 0.8rem; }
.panel-lens span { display: block; font-family: var(--body); font-size: 0.68rem; font-weight: 800; letter-spacing: 0.12em; text-transform: uppercase; color: var(--green); margin-bottom: 0.3rem; }
.situation-panels p:not(.panel-lens) { color: var(--muted); max-width: 36rem; }
.situation-panels .offer-summary { max-width: 48rem; font-size: 1.05rem; }
.offer-detail { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.5rem 2.5rem; margin: 1.6rem 0; padding-top: 1.4rem; border-top: 1px solid var(--line); }
.offer-detail p { margin-bottom: 0; }
.situation-panels .offer-label { color: var(--green); font-size: 0.68rem; font-weight: 800; letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 0.5rem; }
.offer-evidence { border-left: 3px solid var(--green); padding-left: 1rem; }
.offer-evidence p { font-size: 0.85rem; margin: 0.5rem 0 0; }
html:not(.js) .situation-tabs { display: none; }
html:not(.js) .situation-panels [role="tabpanel"][hidden] { display: block; }
html:not(.js) .situation-panels [role="tabpanel"] + [role="tabpanel"] { border-top: 1px solid var(--line); margin-top: 2rem; padding-top: 2rem; }
@media (max-width: 560px) { .offer-detail { grid-template-columns: minmax(0, 1fr); gap: 1.2rem; } }
.situation-note { padding: 0.9rem clamp(1.4rem, 3vw, 2.2rem); border-top: 1px solid var(--line); font-size: 0.9rem; color: var(--muted); margin: 0; max-width: 46rem; }

/* ---------- journey ---------- */

.journey-steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 1.4rem; counter-reset: journey; }
.journey-steps li { counter-increment: journey; border-top: 2px solid var(--ink); padding-top: 1rem; }
.journey-steps li::before { content: "0" counter(journey); font: 500 1.5rem/1 var(--display); color: var(--green); display: block; margin-bottom: 0.5rem; }
.journey-steps p { color: var(--muted); font-size: 0.88rem; }

/* ---------- houston ---------- */

.houston { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.houston-mark {
  font: 500 clamp(6rem, 16vw, 13rem)/0.85 var(--display); letter-spacing: -0.04em;
  color: transparent; -webkit-text-stroke: 2px rgba(28, 36, 30, 0.34);
}
.houston h2 { font-size: clamp(2rem, 3.6vw, 3rem); }
.houston p { color: var(--muted); max-width: var(--measure); }
.evidence-note { border-left: 3px solid var(--green); padding-left: 0.9rem; font-size: 0.88rem; }

/* ---------- standards ---------- */

.standards-grid { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1.6rem; }
.standards-grid li { background: var(--paper-deep); border: 1px solid var(--line); padding: 1.3rem; }
.standards-grid p { color: var(--muted); font-size: 0.88rem; }

/* ---------- decision ---------- */

.decision { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr); gap: 3rem; align-items: center; background: var(--green); color: var(--green-ink); }
.decision h2 { color: var(--green-ink); font-size: clamp(2.2rem, 4.4vw, 3.6rem); }
.decision p { color: var(--muted-inverse); max-width: var(--measure); }
.primary-action--inverse { justify-self: end; box-shadow: 0.3rem 0.3rem 0 rgba(0, 0, 0, 0.35); }

/* ---------- footer ---------- */

.site-footer { display: flex; align-items: center; gap: 1rem 2rem; flex-wrap: wrap; justify-content: space-between; padding: 1.4rem var(--gutter); border-top: 1px solid var(--line); font-size: 0.8rem; color: var(--muted); }
.site-footer div { display: inline-flex; align-items: center; gap: 0.6rem; color: var(--ink); }
.site-footer p { margin: 0; }
.footer-links { display: inline-flex; align-items: center; gap: 1.2rem; flex-wrap: wrap; }
.footer-links a { color: var(--ink); font-weight: 700; text-decoration: underline; text-underline-offset: 4px; overflow-wrap: anywhere; }
.footer-links a:hover, .footer-links a:focus-visible { color: var(--green); }
.footer-links a[aria-current="page"] { text-decoration: none; color: var(--muted); }

/* ---------- dialog (kept for demo pages that still ship an inert preview dialog) ---------- */

.preview-dialog { border: 1px solid var(--ink); background: var(--paper); color: var(--ink); padding: 2.2rem; max-width: 26rem; box-shadow: 0.5rem 0.5rem 0 rgba(28, 36, 30, 0.25); }
.preview-dialog::backdrop { background: rgba(28, 36, 30, 0.55); }
.preview-dialog h2 { font-size: 1.7rem; }
.preview-dialog p:not(.kicker) { color: var(--muted); font-size: 0.95rem; }
.dialog-close { position: absolute; top: 0.7rem; right: 0.7rem; border: 0; background: transparent; font-size: 1.7rem; cursor: pointer; color: var(--muted); }
.dialog-confirm { border: 1px solid var(--ink); background: var(--ink); color: var(--paper); padding: 0.8rem 1.1rem; font-weight: 800; cursor: pointer; margin-top: 0.6rem; }

/* ============ EXTENSION LAYER — multi-page site ============ */

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

/* ---------- interior page hero ---------- */

.page-hero {
  padding: clamp(3rem, 7vw, 5.5rem) var(--gutter) clamp(2.2rem, 5vw, 4rem);
  background-image: repeating-linear-gradient(0deg, transparent 0 27px, rgba(28,36,30,0.05) 27px 28px),
                    repeating-linear-gradient(90deg, transparent 0 27px, rgba(28,36,30,0.05) 27px 28px);
}
.page-hero h1 { font-size: clamp(2.6rem, 5.4vw, 4.4rem); max-width: 14em; }
.page-hero .hero-lede { font-size: 1.08rem; }

.crumb { font-size: 0.78rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 1.6rem; }
.crumb a { color: var(--muted); text-decoration: none; }
.crumb a:hover, .crumb a:focus-visible { color: var(--ink); text-decoration: underline; text-underline-offset: 4px; }

/* ---------- boundary FAQ ---------- */

.faq { margin: 0; max-width: 46rem; }
.faq > div { border-top: 1px solid var(--line); padding: 1.3rem 0; }
.faq dt { font-family: var(--display); font-size: 1.35rem; letter-spacing: -0.02em; margin-bottom: 0.5rem; }
.faq dd { margin: 0; color: var(--muted); max-width: var(--measure); }
.faq dd strong { color: var(--ink); }

/* ---------- policy pages (privacy, terms) ---------- */

.policy { padding-top: clamp(2.5rem, 5vw, 4rem); padding-bottom: clamp(2.5rem, 5vw, 4rem); }
.policy h2 { font-size: clamp(1.7rem, 3.2vw, 2.5rem); max-width: 22em; }
.policy p { color: var(--muted); max-width: 42rem; }
.policy p strong { color: var(--ink); }
.policy a { color: var(--ink); font-weight: 700; text-underline-offset: 4px; overflow-wrap: anywhere; }
.policy-list { margin: 0 0 1rem; padding: 0; list-style: none; max-width: 42rem; display: grid; gap: 0.55rem; }
.policy-list li { position: relative; padding-left: 1.4rem; color: var(--ink); font-size: 0.97rem; }
.policy-list li::before { content: ""; position: absolute; left: 0; top: 0.62em; width: 0.55rem; height: 0.55rem; background: var(--green); }

/* ---------- local-only request form ---------- */

.request-hero .preview-notice { border-left: 3px solid var(--accent); padding-left: 1rem; margin-top: 1.5rem; font-size: 0.94rem; }
.request-shell { padding-top: clamp(2.5rem, 5vw, 4rem); }
.form-lock-note { border: 1px solid var(--accent); background: var(--paper-deep); padding: 1rem; max-width: 48rem; }
.request-form { display: grid; gap: 1.6rem; max-width: 64rem; margin-top: 2rem; }
.request-form[inert] { opacity: 0.72; }
.form-section { border: 1px solid var(--line); background: var(--paper-deep); padding: clamp(1.2rem, 3vw, 2rem); margin: 0; min-width: 0; }
.form-section legend { display: grid; gap: 0.3rem; padding: 0 0.6rem; font: 500 clamp(1.6rem, 3vw, 2.2rem)/1.1 var(--display); color: var(--ink); }
.form-section legend .kicker { font: 800 0.68rem/1.2 var(--body); }
.field-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.4rem; }
.field { display: grid; align-content: start; gap: 0.45rem; min-width: 0; }
.field--wide { grid-column: 1 / -1; }
.field label { font-weight: 800; color: var(--ink); }
.field .optional { color: var(--muted); font-weight: 500; }
.field input, .field select, .field textarea {
  width: 100%; border: 1px solid var(--ink); border-radius: 0; background: var(--paper); color: var(--ink);
  font: inherit; padding: 0.8rem 0.9rem; min-height: 3rem;
}
.field textarea { resize: vertical; min-height: 9rem; }
.field input:focus-visible, .field select:focus-visible, .field textarea:focus-visible, .consent-choice:focus-within {
  outline: 3px solid var(--accent); outline-offset: 3px;
}
.field [aria-invalid="true"] { border-color: var(--accent); border-width: 2px; }
.field-help, .field-error { margin: 0; font-size: 0.86rem; max-width: 42rem; }
.field-help { color: var(--muted); }
.field-error { color: var(--accent); font-weight: 800; }
.consent-section > p { max-width: 48rem; }
.consent-choice { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 0.8rem; align-items: start; padding: 1rem; margin-top: 1rem; border: 1px solid var(--line); background: var(--paper); cursor: pointer; }
.consent-choice input { width: 1.25rem; height: 1.25rem; margin-top: 0.15rem; accent-color: var(--green); }
.consent-choice span { font-size: 0.94rem; line-height: 1.55; }
.consent-policies { margin-top: 1.2rem; }
.consent-policies a { color: var(--ink); font-weight: 800; text-underline-offset: 4px; }
.form-review { border: 1px solid var(--ink); background: var(--green); color: var(--green-ink); padding: clamp(1.3rem, 3vw, 2rem); }
.form-review h3 { color: var(--green-ink); font: 500 clamp(1.7rem, 3vw, 2.3rem)/1.1 var(--display); }
.form-review p { color: var(--muted-inverse); max-width: 48rem; }
.form-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem; margin-top: 1.2rem; }
.form-actions .primary-action { border: 0; cursor: pointer; }
.text-button { border: 1px solid var(--green-ink); background: transparent; color: var(--green-ink); font: 800 0.82rem/1 var(--body); padding: 0.85rem 1rem; cursor: pointer; }
.form-status { min-height: 1.5rem; margin-top: 1.2rem; color: var(--green-ink); font-weight: 700; max-width: 52rem; }
.request-boundary { align-items: start; }

/* ---------- challenge card (scripted demo — local state only) ---------- */

.challenge {
  border: 1px solid var(--line); background: var(--paper-deep);
  box-shadow: 0.45rem 0.45rem 0 rgba(28, 36, 30, 0.12);
}
.challenge-head {
  display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; flex-wrap: wrap;
  padding: 1.1rem clamp(1.2rem, 2.5vw, 2rem); border-bottom: 1px solid var(--line);
}
.challenge-head h3 { font-family: var(--display); font-size: 1.45rem; font-weight: 500; letter-spacing: -0.02em; margin: 0; }
.challenge-label {
  font-size: 0.62rem; font-weight: 800; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--accent); border: 1px solid var(--accent); padding: 0.3rem 0.55rem; background: var(--paper);
}
.challenge-chips { display: flex; flex-wrap: wrap; gap: 0.6rem; padding: 1.1rem clamp(1.2rem, 2.5vw, 2rem); border-bottom: 1px solid var(--line); }
.challenge-chips [role="tab"] {
  border: 1px solid var(--ink); background: transparent; color: var(--ink); cursor: pointer;
  font: 700 0.78rem/1 var(--body); letter-spacing: 0.04em; padding: 0.6rem 0.85rem; min-height: 2.75rem;
}
.challenge-chips [role="tab"][aria-selected="true"] { background: var(--green); color: var(--green-ink); border-color: var(--green); }
.challenge-body { padding: clamp(1.2rem, 2.5vw, 2rem); background: var(--paper); }
.challenge-note { padding: 0.9rem clamp(1.2rem, 2.5vw, 2rem); border-top: 1px solid var(--line); font-size: 0.88rem; color: var(--muted); margin: 0; }

/* ---------- demo index ---------- */

.demo-grid { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.8rem; }
.demo-card {
  position: relative; border: 1px solid var(--line); background: var(--paper-deep);
  padding: 1.6rem 1.6rem 1.4rem; display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 0.55rem; align-content: start;
  box-shadow: 0.45rem 0.45rem 0 rgba(28, 36, 30, 0.12);
}
a.demo-card { color: inherit; text-decoration: none; }
a.demo-card:hover, a.demo-card:focus-visible { transform: translate(2px, 2px); box-shadow: 0.3rem 0.3rem 0 rgba(28, 36, 30, 0.12); }
@media (prefers-reduced-motion: reduce) { a.demo-card:hover { transform: none; } }
.demo-card h3 { grid-column: 1 / -1; font-family: var(--display); font-weight: 500; font-size: clamp(1.7rem, 3vw, 2.3rem); letter-spacing: -0.03em; margin: 0; }
.demo-card .fictional-co { grid-column: 1; grid-row: 1; min-width: 0; font-size: 0.78rem; font-weight: 800; letter-spacing: 0.09em; text-transform: uppercase; color: var(--green); }
.demo-card p { grid-column: 1 / -1; color: var(--muted); font-size: 0.93rem; margin: 0; max-width: 30rem; }
.demo-card .world-strip { grid-column: 1 / -1; height: 0.5rem; margin-top: 0.7rem; background: var(--world-strip, var(--green)); }
.status-chip {
  grid-column: 2; grid-row: 1; align-self: start; justify-self: end; white-space: nowrap;
  font-size: 0.6rem; font-weight: 800; letter-spacing: 0.11em; text-transform: uppercase;
  border: 1px solid var(--line); background: var(--paper); color: var(--muted); padding: 0.3rem 0.5rem;
}
.status-chip--live { border-color: var(--green); color: var(--green); }

/* ---------- responsive (ported + extensions) ---------- */

@media (max-width: 960px) {
  .hero { grid-template-columns: 1fr; }
  .relay-board { max-width: 34rem; }
  .section-heading, .walkthrough, .boundary, .houston, .decision { grid-template-columns: 1fr; }
  .section-heading { gap: 1.1rem; }
  .section-heading p { padding-top: 0; }
  .mechanism-steps { grid-template-columns: 1fr; }
  .journey-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .standards-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .situation-tabs { grid-template-columns: 1fr 1fr; }
  .situation-tabs [role="tab"] { border-bottom: 1px solid var(--line); }
  .site-header { flex-wrap: wrap; gap: 0.8rem 1.2rem; }
  .site-nav { order: 3; width: 100%; margin-left: 0; overflow-x: auto; padding-bottom: 0.2rem; gap: 1.1rem; }
  .site-nav a { white-space: nowrap; }
  .primary-action--inverse { justify-self: start; }
  .houston-mark { order: 2; font-size: clamp(4.5rem, 22vw, 7rem); text-align: center; margin-top: 0.5rem; }
  .demo-grid { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  body { font-size: 1rem; }
  .relay-board { aspect-ratio: auto; display: flex; flex-direction: column; align-items: center; gap: 0.9rem; padding: 2.4rem 1rem 1.5rem; }
  .relay-svg { display: none; }
  .relay-label, .relay-node, .relay-branch { position: static; transform: none; }
  .relay-label { text-align: center; }
  .relay-label--out { max-width: none; text-align: center; }
  .relay-label--in::after, .relay-label--out::before { content: ""; display: block; width: 0; height: 1.1rem; border-left: 2px dashed var(--green); margin: 0.55rem auto 0; }
  .relay-label--out::before { margin: 0 auto 0.55rem; }
  .relay-branch { align-self: center; }
  .journey-steps, .standards-grid, .situation-tabs { grid-template-columns: 1fr; }
  .call-lines .line { grid-template-columns: 1fr; gap: 0.25rem; }
  .call-lines dt { padding-top: 0; }
  .private-banner { font-size: 0.6rem; }
  .fiction-stamp { position: static; display: inline-block; transform: rotate(-2deg); margin: 0 0 1.1rem; }
  .call-meta { padding-right: 0; }
  .hero-actions { align-items: stretch; }
  .primary-action { width: 100%; }
  .challenge-chips { gap: 0.45rem; }
  .field-grid { grid-template-columns: 1fr; }
  .field--wide { grid-column: auto; }
  .consent-choice { padding: 0.85rem; }
  .form-actions { align-items: stretch; }
  .form-actions .primary-action, .text-button { width: 100%; }
}