/* Zerker long-form pages — PRISM web system.
   Loaded after site.css to preserve the proven content components while
   bringing every feature and comparison route into the new site language. */

:root,
:root[data-theme='dark'],
:root[data-theme='light'] {
  --ink: var(--zk-bg);
  --ink-raised: var(--zk-surface);
  --ink-sunken: #f1f1ee;
  --canvas-bg: #f3f3f0;
  --rule: var(--zk-hairline-strong);
  --rule-soft: var(--zk-hairline);
  --paper: var(--zk-text);
  --fog: var(--zk-text-secondary);
  --fog-dim: #808681;
  --ember: var(--zk-accent);
  --ember-soft: var(--zk-accent-soft);
  --ok: var(--zk-success);
  --gate: var(--zk-warning);
  --block: var(--zk-danger);
  --shadow: var(--zk-shadow-card);
  --mono: var(--zk-font-mono);
  --sans: var(--zk-font-sans);
  --gutter: clamp(1.125rem, 4vw, var(--zk-gutter));
  --band: clamp(4.5rem, 9vw, 7.5rem);
  --measure: 42rem;
  color-scheme: light;
}

body {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.58;
  letter-spacing: -0.011em;
}

::selection { background: var(--ember); color: #fff; }

h1,
h2,
h3 {
  font-family: var(--sans);
  letter-spacing: -0.043em;
  line-height: 1;
}

code { font-family: var(--mono); }
p code,
li code,
td code {
  overflow-wrap: anywhere;
  word-break: break-word;
}
a,
button { touch-action: manipulation; }

:focus-visible {
  outline: 3px solid var(--ember);
  outline-offset: 3px;
  border-radius: 6px;
}

.wrap { max-width: var(--zk-content); }

/* Floating shared shell */
.masthead {
  position: sticky;
  top: 0;
  z-index: 50;
  height: 80px;
  padding-top: max(14px, env(safe-area-inset-top));
  padding-right: max(16px, env(safe-area-inset-right));
  padding-bottom: 14px;
  padding-left: max(16px, env(safe-area-inset-left));
  border: 0;
  background: transparent;
  backdrop-filter: none;
  pointer-events: none;
}

.masthead__inner {
  max-width: var(--zk-content);
  min-height: 52px;
  padding: 0 10px 0 18px;
  border: 1px solid var(--rule-soft);
  border-radius: var(--zk-radius-nav);
  background: rgba(248, 248, 246, 0.97);
  box-shadow: var(--zk-shadow-nav);
  pointer-events: auto;
}

.mark {
  gap: 9px;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 760;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.mark svg { display: none; }
.mark::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 24px;
  flex: 0 0 24px;
  color: var(--paper);
  background: currentColor;
  -webkit-mask: url('/assets/brand/zerker-mark.svg?v=3') center / contain no-repeat;
  mask: url('/assets/brand/zerker-mark.svg?v=3') center / contain no-repeat;
}
.mark__suffix {
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--fog);
  border-color: var(--rule);
}

.nav { gap: 4px; }
.nav a,
.menu__trigger {
  padding: 7px 11px;
  border-radius: 8px;
  font-family: var(--sans);
  font-size: 13.5px;
  font-weight: 540;
  color: var(--fog);
}
.nav a:hover,
.menu__trigger:hover,
.menu:hover .menu__trigger,
.menu:focus-within .menu__trigger,
.menu[data-open='true'] .menu__trigger {
  color: var(--paper);
  background: rgba(22, 22, 22, 0.05);
}
.nav .btn {
  margin-left: 4px;
  padding: 8px 14px;
  border: 0;
  border-radius: 10px;
  color: #fff;
  background: #161616;
}
.nav .btn:hover { color: #fff; background: #000; }

.menu__panel {
  top: calc(100% + 10px);
  padding: 24px;
  border-color: var(--rule);
  border-radius: 20px;
  background: rgba(255,255,255,0.985);
  box-shadow: 0 24px 70px rgba(22,22,22,.14);
}
.menu__item { border-radius: 12px; }
a.menu__item:hover,
a.menu__item:focus-visible { background: var(--ember-soft); }
.menu__icon { border-radius: 9px; background: var(--ink-sunken); }
.menu__name { font-family: var(--sans); color: var(--paper); }
.menu__label,
.menu__rail a { font-family: var(--mono); }

/* Editorial page hero */
.fhero {
  min-height: auto;
  padding: clamp(5rem, 10vw, 8.5rem) 0 clamp(5rem, 9vw, 7.5rem);
}
.fhero__trail,
.band__label,
.card__kicker,
.tag {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 550;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.fhero__trail { color: var(--fog); }
.fhero__trail a:hover { color: var(--ember); }
.fhero h1 {
  max-width: 930px;
  margin-top: 26px;
  font-size: clamp(3.25rem, 8vw, 6.7rem);
  font-weight: 800;
}
.fhero h1 em { color: var(--ember); font-style: normal; }
.fhero__sub {
  max-width: 720px;
  margin-top: 30px;
  color: var(--fog);
  font-size: clamp(18px, 2vw, 21px);
  line-height: 1.5;
}
.fhero__meta { margin-top: 28px; }
.tag {
  padding: 7px 11px;
  border-color: var(--rule);
  border-radius: 999px;
  color: var(--fog);
  background: rgba(255,255,255,.55);
}

.btn {
  border: 1px solid var(--rule);
  border-radius: 10px;
  padding: 10px 16px;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 620;
  letter-spacing: -0.01em;
  color: var(--paper);
  background: transparent;
}
.btn:hover { color: var(--paper); border-color: #bdbdb7; background: rgba(22,22,22,.04); }
.btn--solid { color: #fff; border-color: #161616; background: #161616; }
.btn--solid:hover { color: #fff; border-color: #000; background: #000; }
.hero__ctas { gap: 10px; margin-top: 36px; }

/* Long-form content */
.band {
  grid-template-columns: 1fr;
  gap: 24px;
  padding-block: var(--band);
  border-color: var(--rule-soft);
}
@media (min-width: 60rem) {
  .band { grid-template-columns: 150px minmax(0, 1fr); gap: 54px; }
}
.band__label { color: var(--fog); }
.band__label::before { width: 24px; background: var(--ember); }
.band__body { gap: 34px; }
.lede { gap: 16px; }
.lede h2 {
  max-width: 760px;
  font-size: clamp(2.2rem, 5vw, 4.6rem);
  font-weight: 780;
}
.lede p {
  max-width: 680px;
  color: var(--fog);
  font-size: 18px;
  line-height: 1.55;
}

.split { gap: 16px; }
.card {
  padding: clamp(24px, 4vw, 36px);
  border: 1px solid var(--rule-soft);
  border-radius: 24px;
  background: #fff;
  box-shadow: none;
}
.card__kicker { color: var(--ember); }
.card p { color: var(--fog); }
.card h3 { font-size: clamp(1.45rem, 3vw, 2rem); }
.card .wire { margin: 22px -12px 0; }

.wire {
  padding: 22px;
  border: 1px solid rgba(255,255,255,.11);
  border-radius: 16px;
  color: #e8e8e5;
  background: #161616;
  box-shadow: none;
  font-size: 13px;
  line-height: 1.68;
}
.wire b { color: #fff; }
.wire .s-em { color: #a99fff; }
.wire .s-ok { color: #65d8b4; }
.wire .s-gate { color: #f2c566; }
.wire .s-block { color: #f2828c; }
.wire .s-dim { color: #969c97; }

.note {
  padding: 22px 24px;
  border: 0;
  border-left: 3px solid var(--ember);
  border-radius: 0 14px 14px 0;
  color: var(--fog);
  background: var(--ember-soft);
}
.note b { color: var(--paper); }
.note a { color: var(--ember); }

.scroll-x {
  border: 1px solid var(--rule-soft);
  -webkit-overflow-scrolling: touch;
  overscroll-behavior-inline: contain;
  border-radius: 18px;
  background: #fff;
}
.ledger { background: transparent; }
.ledger th,
.ledger td { padding: 18px; border-color: var(--rule-soft); }
.ledger th { color: var(--fog); background: #f4f4f1; }
.ledger td:first-child,
.ledger th[scope='row'] { color: var(--paper); }
.ledger code { color: var(--paper); background: var(--ink-sunken); }
.pill { border: 0; border-radius: 999px; }
.pill--oss { color: #5949ed; background: var(--ember-soft); }
.pill--com { color: #6d5933; background: rgba(168,111,0,.11); }

.claim,
.claim--slim {
  margin: 0;
  padding: clamp(30px, 5vw, 50px);
  border: 1px solid rgba(102,86,251,.22);
  border-radius: 24px;
  color: var(--paper);
  background: linear-gradient(135deg, var(--ember-soft), rgba(255,255,255,.85));
  font-family: var(--sans);
  font-size: clamp(1.7rem, 4vw, 3.4rem);
  font-weight: 760;
  letter-spacing: -.04em;
  line-height: 1.05;
}
.claim em,
.claim--slim em { display: block; margin-top: 10px; color: var(--ember); font-style: normal; }
.picks { color: var(--fog); }
.picks li::marker { color: var(--ember); }

/* Native multi-request visualization */
.traffic-scope {
  margin-bottom: clamp(5rem, 10vw, 9rem);
  overflow: hidden;
  border: 1px solid var(--rule);
  border-radius: 24px;
  background: var(--canvas-bg);
  box-shadow: var(--shadow);
}
.traffic-scope__bar,
.traffic-scope__tally {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 14px 18px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--fog);
}
.traffic-scope__bar { justify-content: space-between; border-bottom: 1px solid var(--rule); }
.traffic-scope__state { margin-left: auto; }
.traffic-scope__state::before {
  content: '';
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--ok);
}
.traffic-scope__toggle {
  border: 0;
  border-radius: 7px;
  padding: 6px 9px;
  color: var(--fog);
  background: rgba(22,22,22,.05);
  font: inherit;
  letter-spacing: .08em;
  text-transform: uppercase;
  cursor: pointer;
}
.traffic-scope__toggle:hover { color: var(--paper); }
.traffic-scope canvas { display: block; width: 100%; height: clamp(280px, 46vw, 500px); }
.traffic-scope__tally { flex-wrap: wrap; border-top: 1px solid var(--rule); }
.traffic-scope__tally b { color: var(--paper); font-size: 13px; }
.traffic-swatch { width: 9px; height: 9px; }
.traffic-swatch--ok { background: var(--ok); }
.traffic-swatch--gate { background: var(--gate); }
.traffic-swatch--block { background: var(--block); }

/* x402 proof */
.payment-demo {
  margin-bottom: clamp(5rem, 10vw, 9rem);
  overflow: hidden;
  border-radius: 24px;
  color: #eceeeb;
  background: #161616;
  box-shadow: var(--shadow);
}
.payment-demo__head {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 15px 20px;
  border-bottom: 1px solid rgba(255,255,255,.12);
  color: #9da39e;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.payment-demo__head span:first-child { color: #f2c566; }
.payment-demo.is-open .payment-demo__head span:first-child { color: #65d8b4; }
.payment-demo__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, .9fr);
  min-height: 430px;
}
.payment-demo__challenge { padding: clamp(26px, 5vw, 48px); }
.payment-demo__challenge h2 {
  max-width: 600px;
  margin: 14px 0 26px;
  color: #fff;
  font-size: clamp(2rem, 4vw, 3.5rem);
}
.payment-demo__challenge .card__kicker { color: #a99fff; }
.payment-demo__challenge .wire { margin-bottom: 18px; background: #202020; }
.payment-demo__trace {
  min-height: 27px;
  margin-bottom: 18px;
  color: #9da39e;
  font-family: var(--mono);
  font-size: 12px;
}
.payment-demo__challenge .btn--solid { color: #111; border-color: #fff; background: #fff; }
.payment-demo__challenge .btn--solid:hover { color: #111; background: #e9e9e6; }
.payment-demo__vault {
  display: grid;
  place-items: center;
  padding: clamp(26px, 5vw, 48px);
  border-left: 1px solid rgba(255,255,255,.12);
  background:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px) 0 0 / 100% 48px,
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px) 0 0 / 48px 100%;
}
.payment-demo__lock {
  padding: 12px 15px;
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 10px;
  color: #9da39e;
  background: rgba(255,255,255,.04);
  font-family: var(--mono);
  font-size: 12px;
}
.payment-demo__answer strong { display: block; margin: 12px 0 18px; color: #fff; font-size: clamp(1.6rem, 3vw, 2.6rem); line-height: 1.08; }
.payment-demo__answer p:last-child { max-width: 430px; color: #9da39e; }
.payment-demo__answer[hidden] { display: none; }

/* Progressive enhancement: a script parse/load failure leaves content visible. */
.rise { opacity: 1; transform: none; }
.js.page-motion-ready .rise {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity var(--zk-duration-reveal) var(--zk-ease-expo), transform var(--zk-duration-reveal) var(--zk-ease-expo);
}
.js.page-motion-ready .rise.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .js.page-motion-ready .rise { opacity: 1; transform: none; transition: none; }
}

footer { margin-top: 50px; border-top: 1px solid var(--rule-soft); background: #fff; }
.colophon { color: var(--fog); font-family: var(--mono); font-size: 12px; }
.colophon a:hover { color: var(--ember); }

@media (max-width: 720px) {
  .masthead { height: 74px; padding: 10px; }
  .masthead__inner { padding-left: 13px; }
  .mark__suffix,
  .nav__hide,
  .nav__hide--tight { display: none; }
  .nav { gap: 0; }
  .nav a,
  .menu__trigger { padding: 7px 8px; font-size: 12.5px; }
  .menu__trigger { min-height: 44px; }
  .menu__panel { top: 70px; border-radius: 16px; }
  .menu__list { grid-template-columns: 1fr; }
  .fhero { padding-top: 70px; }
  .fhero h1 { font-size: clamp(3rem, 15vw, 5rem); }
  .split { grid-template-columns: 1fr; }
  .traffic-scope { border-radius: 18px; }
  .traffic-scope__bar { align-items: flex-start; }
  .traffic-scope__state { display: none; }
  .traffic-scope canvas { height: 330px; }
  .traffic-scope__tally { gap: 10px 16px; }
  .payment-demo { border-radius: 18px; }
  .payment-demo__head { align-items: flex-start; flex-direction: column; }
  .payment-demo__body { grid-template-columns: 1fr; }
  .payment-demo__vault { min-height: 300px; border-top: 1px solid rgba(255,255,255,.12); border-left: 0; }
}