/* commerce/04-relay-board/skin.css — P04 Relay Board persona skin (component SK-A).
   Hand-authored by SK-A-P04-skin-builder. Overrides commerce/base/flow.css (loaded first).
   Tokens/geometry from samples/04-relay-board/styles.css (dark equipment board, mint accent,
   amber signal always paired with text, square geometry, utility rails, inset top bars,
   double borders for selected states). Dark by design: this skin keeps its own dark scheme
   under both prefers-color-scheme values (design: "no forced flip"). Structural variation is
   keyed on <body data-skin-catalog="workcells" data-skin-breakdown="board" data-skin-nav="rail">.
   Wording, numbers, DOM order and the banner's first position are never touched here. */

/* ---------- tokens (concept styles.css :root, lines 1–22) ---------- */
:root, :root[data-persona-id="P04"] {
  color-scheme: dark;
  --bg: #071013;
  --bg-deep: #04090b;
  --surface: #101d21;
  --surface-raised: #16272c;
  --surface-soft: #1b3036;
  --fg: #f3faf7;
  --ink: #f3faf7;
  --muted: #bfd2cc;        /* ~11.9:1 on #071013 */
  --quiet: #9db2ac;        /* ~8.3:1 on #071013 */
  --line: #6f8885;         /* ~3.9:1 non-text on #071013 */
  --line-strong: #9eb5ae;
  --line-soft: #35494b;
  --accent: #9af2c8;       /* ~14:1 on #071013 */
  --accent-fg: #052119;
  --accent-ink: #052119;
  --link: #9af2c8;
  --signal: #ffd68d;       /* amber; always beside text */
  --signal-ink: #251804;
  --notice-bg: #201a10;
  --notice-fg: #fff0d2;
  --notice-line: #ffd68d;
  --error: #ffb7aa;
  --error-bg: #2c1512;
  --ok: #9af2c8;
  --focus: #ffe09f;
  --zebra: #0d181c;
  --rail-top: inset 0 5px 0 var(--line-strong);
  --rail-top-accent: inset 0 5px 0 var(--accent);
}
/* the base dark media block redefines the same tokens later in the cascade order of flow.css;
   this later stylesheet wins in BOTH light and dark modes because it is declared without a media
   query and after flow.css. Restate under the light query for clarity and safety. */
@media (prefers-color-scheme: light) {
  :root { color-scheme: dark; --bg: #071013; --fg: #f3faf7; --surface: #101d21; --muted: #bfd2cc;
          --line: #6f8885; --line-soft: #35494b; --accent: #9af2c8; --accent-fg: #052119; --link: #9af2c8;
          --notice-bg: #201a10; --notice-fg: #fff0d2; --notice-line: #ffd68d; --error: #ffb7aa;
          --error-bg: #2c1512; --ok: #9af2c8; --focus: #ffe09f; --zebra: #0d181c; }
}

html { background: var(--bg-deep); }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.55;
  font-variant-numeric: tabular-nums;
}
a { color: var(--accent); text-underline-offset: 0.22em; text-decoration-thickness: 0.11em; }
a:hover { color: #d5ffea; }
:focus-visible, [tabindex="-1"]:focus, :focus { outline: 3px solid var(--focus); outline-offset: 3px; }
:focus:not(:focus-visible) { outline: none; }
main:focus { outline: none; }

/* wider board field (concept --content 1160px), dense */
.site-header, .flow-nav, .flow-main, .site-footer { max-width: 72.5rem; }
@media (min-width: 1440px) { .site-header, .flow-nav, .flow-main, .site-footer { max-width: 80rem; } }

/* ---------- skip link ---------- */
.skip-link { background: var(--focus); color: #171004; border: 0; border-radius: 0; font-weight: 800; }

/* ---------- demo banner: amber signal band, text carries the meaning ---------- */
.demo-notice {
  background: var(--notice-bg);
  color: var(--notice-fg);
  border-block: 0;
  border-bottom: 3px solid var(--signal);
  box-shadow: inset 5px 0 0 var(--signal);
  padding: 0.75rem clamp(1rem, 4vw, 2rem);
  font-size: 1.0625rem;
  letter-spacing: 0.01em;
}
.nojs { padding-inline: 1rem; }

/* ---------- masthead: head rail + brand mark (concept .head-rail / .brand-mark) ---------- */
.site-header { background: var(--bg); border-bottom: 1px solid var(--line); }
.site-header .masthead.persona-chrome { padding: 0; }
.head-rail {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap;
  gap: 0.5rem 1.25rem; padding: 0.7rem 1rem 0.5rem;
}
.brand-lockup { display: inline-flex; align-items: center; gap: 0.75rem; min-height: 48px; color: var(--ink); }
.brand-mark {
  width: 42px; height: 42px; flex: 0 0 auto;
  border: 2px solid var(--accent); background: #10241e;
  box-shadow: inset 0 0 0 4px #10241e, inset 0 0 0 6px var(--accent);
}
.brand-copy { display: grid; line-height: 1.25; }
.brand-name { font-size: 1.25rem; font-weight: 850; letter-spacing: -0.02em; margin: 0; }
.brand-context { color: var(--muted); font-size: 1rem; }

/* persona nav as a utility rail of tabs */
.persona-nav { padding-inline: 1rem; }
.persona-nav-list, .flow-nav-list {
  border-bottom: 0; margin: 0; gap: 0;
  border-top: 1px solid var(--line-soft);
}
.persona-nav-list a {
  color: var(--muted); font-weight: 750; text-decoration: none;
  padding: 0.55rem 0.8rem; border-bottom: 3px solid transparent;
}
.persona-nav-list a:hover { background: var(--surface-raised); color: var(--ink); border-bottom-color: var(--line-strong); }

/* ---------- flow nav (step rail): bordered rail with inset top bar ---------- */
.flow-nav { padding-inline: 1rem; }
[data-skin-nav="rail"] .flow-nav-list {
  margin: 1rem 0 0.25rem;
  border: 1px solid var(--line-strong);
  border-top: 0;
  background: var(--surface);
  box-shadow: var(--rail-top);
  padding: 5px 0 0;
  gap: 0;
}
[data-skin-nav="rail"] .flow-nav-list li { border-right: 1px solid var(--line); }
[data-skin-nav="rail"] .flow-nav-list li:last-child { border-right: 0; }
[data-skin-nav="rail"] .flow-nav-list a, [data-skin-nav="rail"] .flow-nav-current { padding: 0.4rem 0.9rem; font-weight: 750; }
[data-skin-nav="rail"] .flow-nav-current { color: var(--ink); box-shadow: inset 0 -4px 0 var(--accent); }

/* ---------- type ---------- */
h1, h2, h3 { letter-spacing: -0.02em; line-height: 1.15; font-weight: 800; }
h1.page-heading { font-size: clamp(1.6rem, 3vw, 2.15rem); margin: 1rem 0 0.5rem; }
h2 { font-size: 1.35rem; margin: 1.25rem 0 0.5rem; }
h3 { font-size: 1.125rem; }
p, dl, ul, ol { margin: 0.6rem 0; }
.marker-illustrative { color: var(--muted); font-style: normal; font-weight: 700; font-size: 1rem; }
.pricing-basis, .lead-time-note, .catalog-assumption, .field-hint, .quote-intro,
.email-preview-intro, .catalog-filter-status, .flow-loading { color: var(--muted); font-size: 1rem; }

/* amber signal blocks: bar + text (never a bare colour) */
[data-content-id="commerce.posture-note"], .quote-expired-note, .flow-expired,
[data-content-id="confirmation.disclaimer"] {
  border-left: 5px solid var(--signal);
  background: #201b13; color: #fff2d9;
  padding: 0.65rem 0.9rem;
}
.flow-precondition, .flow-load-error {
  border: 1px solid var(--line-strong); border-radius: 0; background: var(--surface);
  box-shadow: var(--rail-top); padding-top: calc(0.75rem + 5px);
}
.demo-status:not(:empty) { border-left: 5px solid var(--accent); background: var(--surface); }

/* ---------- controls: square, mint primary, bordered secondary, double border when pressed ---------- */
button, .cta-primary, .cta-secondary, .filter-button, .clear-demo, a.cta-primary, a.cta-secondary {
  border-radius: 0;
  border: 2px solid var(--line-strong);
  background: transparent;
  color: var(--ink);
  font-weight: 850;
  min-height: 48px;
  padding: 0.6rem 1rem;
  transition: none;
}
button:hover, .cta-secondary:hover, .filter-button:hover, .clear-demo:hover {
  background: var(--surface-soft); border-color: var(--accent);
}
.cta-primary, button.cta-primary, a.cta-primary, [type="submit"] {
  background: var(--accent); color: var(--accent-ink); border-color: var(--accent);
}
.cta-primary:hover, [type="submit"]:hover, button.cta-primary:hover, a.cta-primary:hover { filter: none; background: #c7ffe4; color: #031812; }
.filter-button[aria-pressed="true"] {
  background: var(--surface-raised); color: var(--accent);
  border: 4px double var(--accent);
  box-shadow: inset 0 -4px 0 var(--accent);
}
[aria-disabled="true"] { opacity: 1; color: var(--muted); border-color: var(--line); }

input, select, textarea {
  border-radius: 0; border: 2px solid var(--line-strong);
  background: var(--surface); color: var(--ink);
}
input:hover, select:hover { border-color: var(--accent); }
input[aria-invalid="true"], select[aria-invalid="true"] { border-color: var(--error); box-shadow: inset 4px 0 0 var(--error); }
select { background-color: var(--surface); }

/* forms as rails: each field is a bounded row on a double-bordered rail */
form { margin: 1rem 0; border: 1px solid var(--line-strong); background: var(--surface); box-shadow: var(--rail-top); padding: calc(0.75rem + 5px) 1rem 1rem; }
.field { margin: 0.75rem 0; padding-left: 0.9rem; border-left: 3px double var(--line-strong); }
.field label { text-transform: uppercase; letter-spacing: 0.06em; font-size: 1rem; color: var(--muted); font-weight: 850; }
.field-hint { margin: 0.2rem 0 0.35rem; }
.field-error { color: var(--error); }
.form-errors { border-radius: 0; border: 3px solid var(--error); background: var(--error-bg); }
.form-errors a { color: var(--error); }
.form-required-note, [data-content-id="form.all-required"] { color: var(--muted); }

/* ---------- catalog: category rail + workcells ---------- */
.catalog-filter {
  border: 1px solid var(--line-strong); background: var(--surface);
  box-shadow: var(--rail-top); padding: calc(0.75rem + 5px) 0.75rem 0.75rem;
  gap: 0.4rem; margin: 1rem 0 0.75rem;
}
.catalog-filter-label { text-transform: uppercase; letter-spacing: 0.06em; color: var(--quiet); font-size: 1rem; }
.filter-button { min-height: 44px; padding: 0.4rem 0.8rem; }
.catalog-filter-status { margin: 0.25rem 0 0.75rem; }
.product-list-heading { margin-top: 1rem; }

[data-skin-catalog="workcells"] .product-list {
  gap: 0; margin: 0.75rem 0 1rem;
  border: 1px solid var(--line-strong);
  background: var(--bg-deep);
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 19rem), 1fr));
}
[data-skin-catalog="workcells"] .product-card {
  border: 0; border-radius: 0; border-right: 3px double var(--line-strong); border-bottom: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--rail-top);
  padding: calc(0.9rem + 5px) 1rem 0.9rem;
  gap: 0.2rem;
}
[data-skin-catalog="workcells"] .product-card:hover,
[data-skin-catalog="workcells"] .product-card:focus-within { box-shadow: var(--rail-top-accent); }
[data-skin-catalog="workcells"] .product-card .product-name a { color: var(--ink); text-decoration-color: var(--accent); }
[data-skin-catalog="workcells"] .product-card .product-name a:hover { color: var(--accent); }
[data-skin-catalog="workcells"] .product-spec { color: var(--muted); margin: 0; }
[data-skin-catalog="workcells"] .product-meta {
  display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 0.3rem 0.75rem;
  margin: 0.4rem 0; padding: 0.4rem 0; border-block: 1px solid var(--line-soft);
}
[data-skin-catalog="workcells"] .product-meta dt {
  color: var(--quiet); font-size: 1rem; text-transform: uppercase; letter-spacing: 0.05em; font-weight: 850;
}
[data-skin-catalog="workcells"] .product-from-price { margin: 0.25rem 0 0; font-size: 1.0625rem; }
.product-from-price-missing { color: var(--muted); font-weight: 600; }

/* desktop board layout: category rail on the left, workcell field on the right (CSS grid on the view; DOM order unchanged) */
@media (min-width: 1024px) {
  html[data-flow-page="catalog"] .flow-view[data-flow-view="catalog"],
  html[data-flow-page="catalog"] .flow-view:has(.catalog-filter) {
    display: grid; grid-template-columns: 15rem minmax(0, 1fr); column-gap: 1.5rem; align-items: start;
  }
  html[data-flow-page="catalog"] .flow-view:has(.catalog-filter) > * { grid-column: 2; }
  html[data-flow-page="catalog"] .flow-view:has(.catalog-filter) > .catalog-filter {
    grid-column: 1; grid-row: 1 / span 12; position: sticky; top: 0.75rem;
    flex-direction: column; align-items: stretch;
  }
  html[data-flow-page="catalog"] .flow-view:has(.catalog-filter) > .catalog-filter .filter-button { justify-content: flex-start; }
}
@media (max-width: 767px) {
  [data-skin-catalog="workcells"] .product-list { grid-template-columns: 1fr; }
  [data-skin-catalog="workcells"] .product-card { border-right: 0; }
}
@media (max-width: 560px) {
  /* label column must never force width at 320 (also under 200 % text-spacing) */
  [data-skin-catalog="workcells"] .product-meta { grid-template-columns: minmax(0, 1fr); gap: 0.1rem 0; }
  [data-skin-catalog="workcells"] .product-meta dd { margin-bottom: 0.35rem; }
  [data-skin-catalog="workcells"] .product-meta dt, .catalog-filter-label, .field label { letter-spacing: 0.02em; }
}

/* ---------- product: workcell detail (spec sheet / provenance as workcell grids) ---------- */
.product-title { margin-top: 0.75rem; }
.product-spec-sheet, .provenance, .order-summary, .margin-panel-values {
  border-radius: 0; border: 1px solid var(--line-strong); background: var(--surface);
  box-shadow: var(--rail-top); padding: 5px 0 0;
  grid-template-columns: max-content minmax(0, 1fr);
  gap: 0;
}
/* flat dt/dd rows rendered as workcell rows: label cell | value cell, ruled */
.product-spec-sheet dt, .provenance dt, .order-summary dt, .margin-panel-values dt {
  color: var(--quiet); font-size: 1rem; text-transform: uppercase; letter-spacing: 0.06em; font-weight: 850;
  padding: 0.55rem 1rem; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line-soft); max-width: 16rem;
}
.product-spec-sheet dd, .provenance dd, .order-summary dd, .margin-panel-values dd {
  margin: 0; padding: 0.55rem 1rem; font-weight: 700; border-bottom: 1px solid var(--line-soft); min-width: 0;
}
.product-spec-sheet dd:last-of-type, .provenance dd:last-of-type, .order-summary dd:last-of-type, .margin-panel-values dd:last-of-type,
.product-spec-sheet dt:last-of-type, .provenance dt:last-of-type, .order-summary dt:last-of-type, .margin-panel-values dt:last-of-type { border-bottom: 0; }
@media (max-width: 767px) {
  .product-spec-sheet, .provenance, .order-summary, .margin-panel-values { grid-template-columns: 1fr; }
  .product-spec-sheet dt, .provenance dt, .order-summary dt, .margin-panel-values dt { border-right: 0; border-bottom: 0; padding-bottom: 0; max-width: none; }
  .product-spec-sheet dt:last-of-type, .provenance dt:last-of-type, .order-summary dt:last-of-type, .margin-panel-values dt:last-of-type { border-bottom: 0; }
}
.unit-price-line { font-size: 1.5rem; margin: 1rem 0 0.25rem; }
.pricing-basis { margin-top: 0.25rem; }
.order-line { font-size: 1.25rem; }

/* ---------- quote breakdown as a status-board table ---------- */
[data-skin-breakdown="board"] .breakdown { border: 1px solid var(--line-strong); box-shadow: var(--rail-top); background: var(--surface); }
[data-skin-breakdown="board"] .breakdown caption {
  padding: calc(0.6rem + 5px) 0.9rem 0.5rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--accent);
  caption-side: top; background: var(--surface); border-bottom: 1px solid var(--line);
}
[data-skin-breakdown="board"] .breakdown th, [data-skin-breakdown="board"] .breakdown td {
  border: 0; border-bottom: 1px solid var(--line-soft); border-right: 1px solid var(--line-soft); padding: 0.55rem 0.9rem;
}
[data-skin-breakdown="board"] .breakdown th:last-child, [data-skin-breakdown="board"] .breakdown td:last-child { border-right: 0; text-align: right; font-variant-numeric: tabular-nums; }
[data-skin-breakdown="board"] .breakdown thead th {
  background: var(--surface-raised); color: var(--quiet); text-transform: uppercase; letter-spacing: 0.06em; font-size: 1rem;
}
[data-skin-breakdown="board"] .breakdown tbody tr:nth-child(even) td,
[data-skin-breakdown="board"] .breakdown tbody tr:nth-child(even) th { background: var(--zebra); }
[data-skin-breakdown="board"] .breakdown th[scope="row"] { color: var(--ink); }
[data-skin-breakdown="board"] .breakdown-total th, [data-skin-breakdown="board"] .breakdown-total td {
  border-top: 3px double var(--accent); background: var(--surface-raised) !important; color: var(--ink);
}
[data-skin-breakdown="board"] .breakdown-total td:last-child { color: var(--accent); font-size: 1.125rem; }
@media (max-width: 767px) {
  [data-skin-breakdown="board"] .breakdown tr { border: 0; border-top: 3px double var(--line-strong); border-radius: 0; margin: 0; }
  [data-skin-breakdown="board"] .breakdown th[scope="row"] { background: var(--surface-raised) !important; }
  [data-skin-breakdown="board"] .breakdown td:last-child { text-align: left; }
  [data-skin-breakdown="board"] .breakdown-total { border-top: 3px double var(--accent); }
}
.quote-locked-state, [data-content-id="quote.locked.state"], .account-state, [data-content-id="account.state"] {
  border-radius: 0; border: 3px double var(--accent); background: var(--surface); box-shadow: inset 5px 0 0 var(--accent); padding-left: calc(0.9rem + 5px);
}
.margin-panel { border-radius: 0; border: 1px solid var(--line-strong); background: var(--surface); box-shadow: var(--rail-top); padding-top: 5px; }
.margin-panel summary { text-transform: uppercase; letter-spacing: 0.05em; font-size: 1rem; }
.margin-panel[open] > summary { border-bottom-color: var(--line); }
.margin-panel-values { box-shadow: none; }

/* ---------- email preview ---------- */
.email-envelope { border-radius: 0; border: 1px solid var(--line-strong); box-shadow: var(--rail-top); padding-top: calc(0.75rem + 5px); background: var(--surface-raised); }
.email-body { border-radius: 0; border: 1px solid var(--line-strong); border-top: 0; background: var(--bg-deep); font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace; }
.email-disclaimer { color: var(--signal); }
.email-result { border-left: 5px solid var(--accent); padding-left: 0.9rem; }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--line); background: var(--bg-deep); max-width: none; padding-inline: clamp(1rem, 4vw, 2.5rem); }
.site-footer > * { max-width: 72.5rem; margin-inline: auto; }
.footer-disclaimer { color: var(--notice-fg); border-left: 5px solid var(--signal); padding-left: 0.9rem; }
.human-next-step { color: var(--muted); }

/* ---------- viewport / motion ---------- */
@media (max-width: 480px) {
  .head-rail { padding-inline: 0.75rem; }
  .brand-mark { width: 36px; height: 36px; box-shadow: inset 0 0 0 3px #10241e, inset 0 0 0 5px var(--accent); }
  [data-skin-nav="rail"] .flow-nav-list li { border-right: 0; }
  form { padding-inline: 0.75rem; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}
@media (forced-colors: active) {
  .demo-notice, .product-card, .catalog-filter, form, .breakdown { border: 2px solid CanvasText; box-shadow: none; }
  .filter-button[aria-pressed="true"] { border-style: double; }
}