/* commerce/07-threadline/skin.css — P07 Threadline persona commerce skin (component SK-B).
   Hand-authored by SK-B-P07-skin-builder. Overrides commerce/base/flow.css (loaded first).
   Tokens/geometry from samples/07-threadline/styles.css (:root lines 1–19; brand-mark 105–115;
   Georgia display 93–99; double signal rule 139; focus 55–58). Dark by design: the same deep-teal
   scheme is used under BOTH prefers-color-scheme values (no forced flip). All text ≥16 px, AA
   contrast on --deep / --deep-2 (ink 15.6:1, muted 11.6:1, signal 12.4:1, teal 11.5:1).
   Structure keyed on <body data-skin-*> only — no DOM reordering. Connector lines are CSS-only and
   illustrative (dashed/dotted paths + junction dots); nothing animates. */

:root, :root[data-persona-id="P07"] {
  color-scheme: dark;
  --ink: #f6f2e8;
  --deep: #10191d;
  --deep-2: #16252a;
  --deep-3: #1d3036;
  --rule: #52676b;
  --signal: #ffd36f;
  --signal-strong: #ffdf92;
  --teal: #8cd8cc;
  --teal-deep: #0f6a5f;
  --error-ink: #ffe0d8;
  --error-line: #ff8e78;
  --ok-line: #8cd8cc;

  /* base token remap */
  --fg: var(--ink);
  --bg: var(--deep);
  --muted: #c7d1cf;
  --line: #718a8d;
  --line-soft: #3b5056;
  --surface: var(--deep-2);
  --accent: var(--signal);
  --accent-fg: #11191c;
  --link: var(--teal);
  --notice-bg: #2a2a16;
  --notice-fg: var(--signal-strong);
  --notice-line: var(--signal);
  --error: var(--error-ink);
  --error-bg: #2b1a17;
  --ok: var(--ok-line);
  --focus: var(--signal-strong);
  --zebra: #14222a;
  --display: Georgia, "Times New Roman", serif;
}
@media (prefers-color-scheme: light) {
  :root { color-scheme: dark; }
}
@media (prefers-color-scheme: dark) {
  :root {
    --fg: var(--ink); --bg: var(--deep); --muted: #c7d1cf; --line: #718a8d; --line-soft: #3b5056;
    --surface: var(--deep-2); --accent: var(--signal); --accent-fg: #11191c; --link: var(--teal);
    --notice-bg: #2a2a16; --notice-fg: var(--signal-strong); --notice-line: var(--signal);
    --error: var(--error-ink); --error-bg: #2b1a17; --ok: var(--ok-line); --focus: var(--signal-strong);
    --zebra: #14222a;
  }
}

html { background: var(--deep); }
body {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  background: var(--deep);
  color: var(--ink);
}
h1, h2, h3, caption, .brand-name, summary, .unit-price-line, .order-line {
  font-family: var(--display);
  font-weight: 700;
  letter-spacing: 0.005em;
}
h1.page-heading { font-size: clamp(1.7rem, 3.4vw, 2.3rem); font-weight: 500; }
h2 { font-size: 1.45rem; }
a { color: var(--teal); }
.marker-illustrative { color: var(--muted); }
:focus-visible, :focus, [tabindex="-1"]:focus { outline: 3px solid var(--signal-strong); outline-offset: 3px; }
:focus:not(:focus-visible) { outline: none; }
main:focus { outline: none; }

/* ---------- chrome ---------- */
.skip-link { background: var(--signal); color: #11191c; border-color: #11191c; }
.demo-notice { background: var(--notice-bg); color: var(--signal-strong); border-block: 2px solid var(--signal); }
.site-header { border-bottom: 1px solid var(--rule); }
.masthead.persona-chrome { padding-block: 0.9rem 0.8rem; }
.brand-lockup { display: flex; gap: 0.7rem; align-items: center; }
.brand-lockup > span:last-child { display: flex; flex-direction: column; min-width: 0; }
.brand-mark {
  flex: 0 0 auto;
  display: grid; place-items: center;
  width: 2.5rem; height: 2.5rem;
  border: 2px solid var(--signal); border-radius: 50%;
  color: var(--signal); font-family: var(--display); font-size: 1.3rem;
}
.brand-name { font-size: 1.25rem; margin-right: 0; }
.brand-context { color: var(--muted); font-size: 1rem; }
.flow-nav-list { border-bottom: 1px dashed var(--line); gap: 0 1.5rem; }
.flow-nav-list a { color: var(--teal); text-decoration-thickness: 1px; }
.flow-nav-current { color: var(--signal); }
.flow-nav-current::before {
  content: ""; display: inline-block; width: 0.55rem; height: 0.55rem; margin-right: 0.5rem;
  border-radius: 50%; background: var(--signal);
}

/* ---------- controls: junction pills ---------- */
button, .cta-primary, .cta-secondary, .filter-button, .clear-demo, a.cta-primary, a.cta-secondary {
  border-radius: 999px;
  border: 2px solid var(--teal);
  background: var(--deep-2);
  color: var(--teal);
  transition: none;
}
button:hover, .cta-secondary:hover, .filter-button:hover, .clear-demo:hover { background: var(--deep-3); }
.cta-primary, button.cta-primary, a.cta-primary, [type="submit"] {
  background: var(--signal); color: #11191c; border-color: var(--signal);
}
.cta-primary:hover, [type="submit"]:hover { filter: none; background: var(--signal-strong); }
.filter-button[aria-pressed="true"] { background: var(--teal); color: #11191c; border-color: var(--teal); }
input, select, textarea { border-radius: 4px; border: 2px solid var(--line); background: var(--deep-2); color: var(--ink); }
input:hover, select:hover, textarea:hover { border-color: var(--teal); }
input[aria-invalid="true"], select[aria-invalid="true"] { border-color: var(--error-line); }
.field-error { color: var(--error-ink); }
.form-errors { border-color: var(--error-line); background: var(--error-bg); border-radius: 4px; }
.form-errors-heading, .form-errors a { color: var(--error-ink); }

/* forms as junction cards */
form { position: relative; padding: 0.25rem 1rem 0.5rem 1.25rem; border-left: 3px double var(--teal); }
.field { position: relative; }
.field label::before {
  content: ""; position: absolute; left: -1.25rem; top: 0.55rem;
  width: 0.55rem; height: 0.55rem; border-radius: 50%;
  border: 2px solid var(--teal); background: var(--deep); transform: translateX(-52%);
}
form .form-required-note { margin-top: 0; }

/* posture / status notes */
[data-content-id="commerce.posture-note"], .quote-expired-note, .flow-expired,
[data-content-id="confirmation.disclaimer"] {
  border-left: 3px double var(--signal); background: var(--deep-2); border-radius: 0 4px 4px 0;
}
.demo-status:not(:empty) { border-left: 3px double var(--teal); background: var(--deep-2); }
.flow-precondition, .flow-load-error { border-radius: 4px; border-style: dashed; }
.quote-locked-state, [data-content-id="quote.locked.state"], .account-state, [data-content-id="account.state"] {
  border: 2px dashed var(--teal); border-radius: 4px; background: var(--deep-2);
}

/* ---------- catalog: dependency chapters ---------- */
[data-skin-catalog="chapters"] .catalog-filter { gap: 0.6rem; }
[data-skin-catalog="chapters"] .product-list-heading { padding-bottom: 0.4rem; border-bottom: 1px dashed var(--line); }
[data-skin-catalog="chapters"] .product-list {
  display: block;
  position: relative;
  margin: 1.25rem 0 1.5rem;
  padding-left: 1.75rem;
  border-left: 2px dashed var(--line);
}
[data-skin-catalog="chapters"] .product-card {
  position: relative;
  margin: 0 0 1.25rem;
  padding: 0.9rem 1.1rem 1rem;
  border: 2px solid var(--line);
  border-radius: 14px;
  background: var(--deep-2);
  gap: 0.35rem;
}
/* connector stub from the chapter spine to each node + junction dot */
[data-skin-catalog="chapters"] .product-card::before {
  content: ""; position: absolute; left: -1.75rem; top: 1.55rem; width: 1.75rem; height: 0;
  border-top: 2px dotted var(--teal);
}
[data-skin-catalog="chapters"] .product-card::after {
  content: ""; position: absolute; left: calc(-1.75rem - 0.45rem); top: 1.15rem;
  width: 0.7rem; height: 0.7rem; border-radius: 50%;
  background: var(--deep); border: 2px solid var(--teal);
}
/* chapter tint per category, keyed on the existing data-category (illustrative, colour + border style) */
[data-skin-catalog="chapters"] .product-card[data-category="base-metals"] { border-color: var(--teal); }
[data-skin-catalog="chapters"] .product-card[data-category="critical-minerals"] { border-color: var(--teal); border-style: dashed; }
[data-skin-catalog="chapters"] .product-card[data-category="energy"] { border-color: var(--signal); }
[data-skin-catalog="chapters"] .product-card[data-category="bulk"] { border-color: var(--signal); border-style: dashed; }
[data-skin-catalog="chapters"] .product-card[data-category="agri"] { border-color: var(--line); }
[data-skin-catalog="chapters"] .product-card[data-category="softs"] { border-color: var(--line); border-style: dashed; }
[data-skin-catalog="chapters"] .product-card[data-category="energy"]::after,
[data-skin-catalog="chapters"] .product-card[data-category="bulk"]::after { border-color: var(--signal); }
[data-skin-catalog="chapters"] .product-card[data-category="energy"]::before,
[data-skin-catalog="chapters"] .product-card[data-category="bulk"]::before { border-top-color: var(--signal); }
[data-skin-catalog="chapters"] .product-card[data-category="agri"]::after,
[data-skin-catalog="chapters"] .product-card[data-category="softs"]::after { border-color: var(--line); }
[data-skin-catalog="chapters"] .product-card[data-category="agri"]::before,
[data-skin-catalog="chapters"] .product-card[data-category="softs"]::before { border-top-color: var(--line); }
[data-skin-catalog="chapters"] .product-card h3 { font-size: 1.2rem; }
[data-skin-catalog="chapters"] .product-card h3 a { color: var(--ink); text-decoration-color: var(--teal); }
[data-skin-catalog="chapters"] .product-spec { color: var(--muted); margin: 0; }
[data-skin-catalog="chapters"] .product-meta {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 14rem), 1fr));
  gap: 0.35rem 1.25rem; padding-top: 0.6rem; border-top: 1px dotted var(--line);
}
[data-skin-catalog="chapters"] .product-meta dt { color: var(--muted); font-weight: 600; }
[data-skin-catalog="chapters"] .product-meta dd { margin-bottom: 0.4rem; }
[data-skin-catalog="chapters"] .product-from-price {
  display: inline-block; align-self: flex-start; padding: 0.35rem 0.85rem;
  border: 2px solid var(--signal); border-radius: 999px; color: var(--signal-strong);
}
[data-skin-catalog="chapters"] .product-from-price-missing { color: var(--muted); }
@media (min-width: 900px) {
  [data-skin-catalog="chapters"] .product-card { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); column-gap: 1.5rem; }
  [data-skin-catalog="chapters"] .product-card h3, [data-skin-catalog="chapters"] .product-spec { grid-column: 1; }
  [data-skin-catalog="chapters"] .product-meta { grid-column: 2; grid-row: 1 / span 3; border-top: 0; border-left: 1px dotted var(--line); padding: 0 0 0 1.25rem; grid-template-columns: 1fr; }
  [data-skin-catalog="chapters"] .product-from-price { grid-column: 1; margin-top: 0.4rem; }
}

/* ---------- product: node detail ---------- */
.product-spec-sheet, .provenance, .order-summary, .margin-panel-values {
  border: 2px solid var(--line); border-radius: 14px; background: var(--deep-2); padding: 1rem 1.25rem;
}
.provenance { border-style: dashed; }
.unit-price-line { color: var(--signal-strong); font-size: 1.4rem; }
.pricing-basis { border-left: 3px double var(--line); padding-left: 0.75rem; }
dl { gap: 0.4rem 1.25rem; grid-template-columns: minmax(0, max-content) 1fr; }
@media (max-width: 767px) { dl { grid-template-columns: 1fr; } }

/* ---------- quote breakdown: dependency list ---------- */
[data-skin-breakdown="dependencies"] .breakdown { border-collapse: separate; border-spacing: 0; }
[data-skin-breakdown="dependencies"] .breakdown caption { font-size: 1.25rem; padding: 0.5rem 0 0.75rem; }
[data-skin-breakdown="dependencies"] .breakdown th, [data-skin-breakdown="dependencies"] .breakdown td {
  border: 0; border-bottom: 1px dashed var(--line); background: transparent !important; padding: 0.7rem 0.75rem;
}
[data-skin-breakdown="dependencies"] .breakdown thead th {
  border-bottom: 2px solid var(--line); color: var(--muted); font-weight: 600; font-family: inherit;
}
[data-skin-breakdown="dependencies"] .breakdown th[scope="row"] { position: relative; padding-left: 1.75rem; width: 15rem; }
/* connectors: dotted spine between rows + junction dot per item */
[data-skin-breakdown="dependencies"] .breakdown tbody th[scope="row"]::before {
  content: ""; position: absolute; left: 0.5rem; top: 0; bottom: 0; border-left: 2px dotted var(--teal);
}
[data-skin-breakdown="dependencies"] .breakdown tbody th[scope="row"]::after {
  content: ""; position: absolute; left: 0.5rem; top: 1.05rem; width: 0.7rem; height: 0.7rem;
  border-radius: 50%; border: 2px solid var(--teal); background: var(--deep); transform: translateX(-42%);
}
[data-skin-breakdown="dependencies"] .breakdown td:last-child { color: var(--ink); }
[data-skin-breakdown="dependencies"] .breakdown-total th, [data-skin-breakdown="dependencies"] .breakdown-total td {
  border-top: 2px solid var(--signal); border-bottom: 2px solid var(--signal); background: var(--deep-2) !important; color: var(--signal-strong);
}
[data-skin-breakdown="dependencies"] .breakdown-total th[scope="row"]::after { border-color: var(--signal); background: var(--signal); }
[data-skin-breakdown="dependencies"] .breakdown-total th[scope="row"]::before { border-left-color: var(--signal); bottom: 50%; }
@media (max-width: 767px) {
  [data-skin-breakdown="dependencies"] .breakdown tr { border: 2px solid var(--line); border-radius: 14px; margin-bottom: 0.9rem; background: var(--deep-2); }
  [data-skin-breakdown="dependencies"] .breakdown th, [data-skin-breakdown="dependencies"] .breakdown td { border-bottom: 1px dotted var(--line); }
  [data-skin-breakdown="dependencies"] .breakdown tr > :last-child { border-bottom: 0; }
  [data-skin-breakdown="dependencies"] .breakdown th[scope="row"] { width: auto; padding-left: 1.75rem; }
  [data-skin-breakdown="dependencies"] .breakdown tbody th[scope="row"]::before { display: none; }
  [data-skin-breakdown="dependencies"] .breakdown-total { border-color: var(--signal); }
  [data-skin-breakdown="dependencies"] .breakdown-total th, [data-skin-breakdown="dependencies"] .breakdown-total td { border-top: 0; }
  [data-skin-breakdown="dependencies"] .breakdown-total th[scope="row"] { border-bottom: 1px dotted var(--signal); }
}
.margin-panel { border: 2px dashed var(--line); border-radius: 14px; }
.margin-panel[open] > summary { border-bottom-color: var(--line-soft); }
.quote-actions { padding-top: 0.5rem; }

/* ---------- email preview ---------- */
.email-envelope { border: 2px solid var(--line); border-bottom: 0; border-radius: 14px 14px 0 0; background: var(--deep-2); }
.email-body { border: 2px solid var(--line); border-radius: 0 0 14px 14px; background: var(--deep); }

/* ---------- footer ---------- */
.site-footer { border-top: 1px dashed var(--line); }
.footer-disclaimer { color: var(--signal-strong); }
.footer-links a { color: var(--teal); }

@media (max-width: 480px) {
  [data-skin-catalog="chapters"] .product-list { padding-left: 1.4rem; }
  [data-skin-catalog="chapters"] .product-card::before { left: -1.4rem; width: 1.4rem; }
  [data-skin-catalog="chapters"] .product-card::after { left: calc(-1.4rem - 0.45rem); }
  [data-skin-catalog="chapters"] .product-card { padding-inline: 0.85rem; }
  form { padding-inline: 0.5rem 0.25rem; padding-left: 0.9rem; }
  .field label::before { left: -0.9rem; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}
@media (forced-colors: active) {
  .product-card, .breakdown tr, form { border-color: CanvasText; }
  .product-card::after, .breakdown th[scope="row"]::after { border-color: CanvasText; background: Canvas; }
}