/* Public API — bespoke visuals for the single-page contract doc.
   The page's idea is CONVERGENCE: the platform is API-first, so every surface
   (ours and the customer's) funnels onto one public contract, under which a
   single engine answers. The hero is a top-down FUNNEL — a row of surface chips
   narrows through the contract bar down to the core. Below sit four numbered
   cards (contract · auth · identity · governance), a two-class table, the
   reference-surface catalog, and a literal call sketch.
   Loaded by modules/public-api/index.html on top of module.css.
   Placement convention: a module's bespoke visuals live beside its index. §Styling */

/* ══════════════════════════════════════════
   HERO — display headline · lede
   ══════════════════════════════════════════ */
.pa-hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.55rem;
  padding: 1.6rem 0 1.8rem;
  background:
    radial-gradient(58% 70% at 50% 0%, var(--tint-15), transparent 68%),
    radial-gradient(36% 50% at 84% 14%, var(--tint-8), transparent 70%);
}
.pa-title {
  font-family: "Fraunces", Georgia, "Times New Roman", serif;
  font-optical-sizing: auto;
  font-weight: 600;
  font-size: clamp(1.9rem, 4.6vw, 2.9rem);
  line-height: 1.1;
  letter-spacing: -0.015em;
  color: var(--text);
  max-width: 20ch;
  margin: 0.1rem 0 0;
  text-wrap: balance;
}
.pa-lede {
  font-size: 1.02rem;
  line-height: 1.6;
  color: var(--text-dim);
  max-width: 54ch;
  margin: 0;
}

/* ══════════════════════════════════════════
   FAN — surfaces → contract → core (top-down funnel)
   A row of surface chips narrows through a labelled rail onto the accent
   contract bar (the heart), then drops to the core nodes.
   ══════════════════════════════════════════ */
.pa-fan {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  margin: 0.4rem 0 1.5rem;
}

/* ── Surfaces row ── */
.pa-clients {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.45rem;
}
.pa-client {
  font-weight: 600;
  font-size: 0.84rem;
  color: var(--text);
  padding: 0.4rem 0.85rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 11px;
}
.pa-client--yours {
  color: var(--accent);
  border-style: dashed;
  border-color: var(--accent-muted);
  background: var(--tint-6);
}

/* ── Funnel rail — converging line + label ── */
.pa-funnel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  width: 100%;
}
.pa-funnel__rail {
  width: 2px;
  height: 26px;
  background-image: linear-gradient(
    to bottom,
    var(--accent) 0 6px,
    transparent 6px 12px
  );
  background-size: 2px 12px;
  background-repeat: repeat-y;
  animation: pa-march-y 0.9s linear infinite;
}
.pa-funnel__lbl {
  font-size: 0.7rem;
  letter-spacing: 0.02em;
  color: var(--text-muted);
}
.pa-funnel__lbl::before {
  content: "▾";
  margin-right: 0.35rem;
  color: var(--accent);
}

/* ── Contract bar — the accent heart ── */
.pa-contract {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  text-align: center;
  width: min(100%, 30rem);
  padding: 0.95rem 1.2rem 1.05rem;
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 16px;
  box-shadow: 0 8px 24px -10px var(--accent);
}
.pa-contract__tag {
  font-family: var(--mono);
  font-size: 0.58rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: var(--pill-radius);
  padding: 0.08rem 0.45rem;
}
.pa-contract__name {
  font-weight: 700;
  font-size: 1.05rem;
  color: #fff;
}
.pa-contract__name code {
  font-size: 0.92rem;
  color: #fff;
}
.pa-contract__desc {
  font-size: 0.76rem;
  line-height: 1.45;
  color: rgba(255, 255, 255, 0.85);
}
.pa-contract__desc code {
  font-size: 0.72rem;
  color: #fff;
}
.pa-contract__only {
  width: 100%;
  margin-top: 0.45rem;
  padding-top: 0.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.28);
  font-weight: 600;
  font-size: 0.84rem;
  color: #fff;
}

/* ── Drop to core ── */
.pa-drop {
  display: flex;
  justify-content: center;
}
.pa-drop__rail {
  width: 2px;
  height: 22px;
  background-image: linear-gradient(
    to bottom,
    var(--accent-muted) 0 6px,
    transparent 6px 12px
  );
  background-size: 2px 12px;
  background-repeat: repeat-y;
}

/* ── Core nodes ── */
.pa-core {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  width: min(100%, 30rem);
  padding: 0.85rem 1rem 0.95rem;
  background: var(--tint-6);
  border: 1px solid var(--tint-25);
  border-radius: 14px;
}
.pa-core__lbl {
  font-family: var(--mono);
  font-size: 0.58rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-muted);
}
.pa-core__nodes {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.4rem;
}
.pa-core__node {
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--text);
  padding: 0.3rem 0.7rem;
  background: var(--paper);
  border: 1px solid var(--tint-25);
  border-radius: 9px;
}

/* ══════════════════════════════════════════
   THESIS — the concept's heart, one accented line
   ══════════════════════════════════════════ */
.pa-thesis {
  margin: 0 0 1.8rem;
  padding: 1rem 1.2rem;
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--text-dim);
  background: var(--surface);
  border-left: 3px solid var(--accent);
  border-radius: 0 10px 10px 0;
}
.pa-thesis strong {
  color: var(--text);
}
.pa-thesis .xref-module {
  display: inline-block;
  margin-top: 0.2rem;
  font-size: 0.82rem;
}

/* ══════════════════════════════════════════
   CARDS — contract · auth · identity · governance (numbered)
   ══════════════════════════════════════════ */
.pa-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.9rem;
}
.pa-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.25rem 1.2rem 1.3rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
}
.pa-card__num {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--accent);
}
.pa-card__title {
  font-family: "Fraunces", Georgia, serif;
  font-weight: 600;
  font-size: 1.18rem;
  line-height: 1.15;
  color: var(--text);
  margin: 0;
}
.pa-card__sub {
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--text-dim);
  margin: 0;
}
.pa-card__foot {
  margin: auto 0 0;
  padding-top: 0.3rem;
  font-size: 0.76rem;
  line-height: 1.5;
  color: var(--text-muted);
}
.pa-card__foot strong {
  color: var(--text-dim);
}

/* ── List — sequenced now / later items inside a card ── */
.pa-list {
  list-style: none;
  margin: 0.1rem 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}
.pa-list__item {
  display: flex;
  flex-direction: column;
  gap: 0.18rem;
  padding-left: 0.7rem;
  border-left: 2px solid var(--border);
}
.pa-list__item--now {
  border-left-color: var(--accent);
}
/* operation row — name + optional trailing version pill, hugging content */
.pa-list__op {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}
.pa-list__op > code,
.pa-list__op > strong {
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--text);
}
.pa-list__op > code {
  color: var(--accent);
}
.pa-list__link {
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--tint-25);
}
.pa-list__link:hover {
  border-bottom-color: var(--accent);
}
.pa-list__link code {
  font-size: 0.8rem;
}
.pa-list__note {
  font-size: 0.74rem;
  line-height: 1.4;
  color: var(--text-muted);
}
.pa-list__note code {
  font-size: 0.72rem;
}

/* ── Governance — two controls ── */
.pa-gov {
  list-style: none;
  margin: 0.1rem 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}
.pa-gov__item {
  display: flex;
  gap: 0.6rem;
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--text-dim);
}
.pa-gov__item strong {
  color: var(--text);
}
.pa-gov__icon {
  flex: none;
  display: grid;
  place-items: center;
  width: 1.6rem;
  height: 1.6rem;
  border-radius: 8px;
  background: var(--tint-8);
  border: 1px solid var(--tint-25);
  color: var(--accent);
}
.pa-gov__icon svg {
  width: 0.95rem;
  height: 0.95rem;
}

/* ══════════════════════════════════════════
   CLASSES — two-surface comparison table
   ══════════════════════════════════════════ */
/* extra air above so the table doesn't merge with the cards block above */
#surface-classes {
  margin-top: 2.4rem;
}
.pa-classes {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
}
.pa-classes th,
.pa-classes td {
  padding: 0.6rem 0.8rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--border);
  line-height: 1.45;
  color: var(--text-dim);
}
.pa-classes thead th {
  border-bottom: 2px solid var(--tint-25);
}
.pa-classes__col {
  font-weight: 700;
  color: var(--text);
}
.pa-classes__rk {
  width: 7rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}
.pa-classes tbody tr:last-child td {
  border-bottom: none;
}
.pa-classes code {
  font-size: 0.76rem;
}
.pa-classes__foot {
  margin: 0.9rem 0 0;
  font-size: 0.78rem;
  line-height: 1.55;
  color: var(--text-muted);
}
.pa-classes__foot strong {
  color: var(--text-dim);
}
.pa-classes__foot code {
  font-size: 0.74rem;
}

/* ══════════════════════════════════════════
   REFS — reference-surface catalog
   ══════════════════════════════════════════ */
.pa-refs__lead {
  font-size: 0.86rem;
  line-height: 1.55;
  color: var(--text-dim);
  margin: 0 0 0.9rem;
}
.pa-refs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.8rem;
}
.pa-ref {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 1rem 1.05rem 1.1rem;
  text-decoration: none;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 13px;
  transition:
    border-color 0.18s,
    transform 0.18s;
}
.pa-ref:hover {
  border-color: var(--accent-muted);
  transform: translateY(-2px);
}
.pa-ref__icon {
  font-size: 1.5rem;
  line-height: 1;
  color: var(--text-muted);
  transition: color 0.18s;
}
.pa-ref:hover .pa-ref__icon {
  color: var(--accent);
}
.pa-ref__name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--accent);
}
.pa-ref__desc {
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--text-muted);
}

/* ══════════════════════════════════════════
   CALL — literal request / response sketch (illustrative)
   ══════════════════════════════════════════ */
.pa-call {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
}
.pa-call__side {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.pa-call__tag {
  align-self: flex-start;
  font-family: var(--mono);
  font-size: 0.6rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: var(--pill-radius);
  padding: 0.08rem 0.5rem;
}
.pa-call__tag--ok {
  color: var(--s2);
  border-color: var(--s2);
}
.pa-call__body {
  margin: 0;
  padding: 0.8rem 0.9rem;
  font-family: var(--mono);
  font-size: 0.73rem;
  line-height: 1.65;
  color: var(--text-dim);
  white-space: pre-wrap;
  word-break: break-word;
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.pa-call__verb {
  color: var(--accent);
  font-weight: 600;
}
.pa-call__ok {
  color: var(--s2);
  font-weight: 600;
}
.pa-call__hdr {
  color: var(--text-muted);
}
.pa-call__key {
  color: var(--text);
}
.pa-call__str {
  color: var(--s2);
}
.pa-call__note {
  margin: 0.9rem 0 0;
  font-size: 0.8rem;
  line-height: 1.55;
  color: var(--text-muted);
}
.pa-call__note strong {
  color: var(--text-dim);
}

/* ══════════════════════════════════════════
   Responsive — funnel widths already fluid; collapse grids
   ══════════════════════════════════════════ */
@media (max-width: 680px) {
  .pa-cards,
  .pa-refs,
  .pa-call {
    grid-template-columns: 1fr;
  }
}

/* ══════════════════════════════════════════
   Entrance — staggered rise on load
   ══════════════════════════════════════════ */
.pa-hero > *,
.pa-fan,
.pa-thesis,
.pa-card {
  animation: pa-rise 0.7s cubic-bezier(0.2, 0.7, 0.2, 1) both;
}
.pa-title {
  animation-delay: 0.12s;
}
.pa-lede {
  animation-delay: 0.22s;
}
.pa-fan {
  animation-delay: 0.38s;
}
.pa-thesis {
  animation-delay: 0.5s;
}
.pa-cards .pa-card:nth-child(1) {
  animation-delay: 0.56s;
}
.pa-cards .pa-card:nth-child(2) {
  animation-delay: 0.62s;
}
.pa-cards .pa-card:nth-child(3) {
  animation-delay: 0.68s;
}
.pa-cards .pa-card:nth-child(4) {
  animation-delay: 0.74s;
}

@keyframes pa-rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@keyframes pa-march-y {
  to {
    background-position: 0 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .pa-hero > *,
  .pa-fan,
  .pa-thesis,
  .pa-card,
  .pa-funnel__rail {
    animation: none;
  }
}

/* ── Deep-link landing flash — cross-module links land on the thesis / a card ── */
.pa-thesis:target,
.pa-card:target {
  animation: target-highlight 2.6s ease-out;
}

@media (prefers-reduced-motion: reduce) {
  .pa-thesis:target,
  .pa-card:target {
    animation: none;
    box-shadow: 0 0 0 2px var(--accent-muted);
  }
}