/* ==========================================================================
   Agent Middleware API — "ledger & seal" design system
   Ground: deep ledger ink. Light surfaces are reserved for paper artifacts
   (the pilot ticket and the live receipt). Brass marks authority; green is
   spent only on verification status.
   ========================================================================== */

:root {
  --ink: #0b1120;
  --panel: #111a2e;
  --rule: #243252;
  --rule-soft: #1a2540;
  --paper: #f8f5ec;
  --paper-shade: #efe9da;
  --paper-ink: #141925;
  --paper-dim: #4d5468;
  --text: #dee4f2;
  --text-dim: #93a0bc;
  --brass: #d8a03e;
  --brass-bright: #ebb958;
  --verify: #3fbf87;
  --danger: #e2694f;

  --font-display: "Libre Franklin", "Helvetica Neue", Arial, sans-serif;
  --font-body: "Public Sans", "Segoe UI", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;

  --measure: 62ch;
  --page-max: 1120px;
  --pad-x: clamp(1.25rem, 4vw, 2.5rem);
  --focus-ring: 2px solid var(--brass);
}

/* Accessibility panel overrides ------------------------------------------ */

html {
  font-size: calc(100% * var(--a11y-scale, 1));
  /* keep in-page anchor targets clear of the sticky nav */
  scroll-padding-top: 5.5rem;
}

html[data-a11y-contrast="high"] {
  --ink: #000000;
  --panel: #0b0b0d;
  --rule: #6b7690;
  --rule-soft: #444d63;
  --paper: #ffffff;
  --paper-shade: #f1f1f1;
  --paper-ink: #000000;
  --paper-dim: #26292f;
  --text: #ffffff;
  --text-dim: #d4dae8;
  --brass: #ffc94d;
  --brass-bright: #ffd97a;
  --verify: #5ce0a4;
}

html[data-a11y-spacing="wide"] body {
  line-height: 1.85;
  letter-spacing: 0.015em;
  word-spacing: 0.06em;
}

html[data-a11y-underline="on"] a {
  text-decoration: underline !important;
  text-underline-offset: 0.18em;
}

html[data-a11y-motion="reduce"] *,
html[data-a11y-motion="reduce"] *::before,
html[data-a11y-motion="reduce"] *::after {
  animation-duration: 0.01ms !important;
  animation-delay: 0s !important;
  animation-iteration-count: 1 !important;
  transition-duration: 0.01ms !important;
  scroll-behavior: auto !important;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-delay: 0s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Base --------------------------------------------------------------------- */

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  background: var(--brass);
  color: var(--ink);
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.08;
  margin: 0 0 1rem;
  text-wrap: balance;
}

h1 {
  font-size: clamp(2.4rem, 5.4vw, 4rem);
}

h2 {
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
}

p {
  margin: 0 0 1rem;
  max-width: var(--measure);
}

a {
  color: var(--brass);
  text-decoration: none;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--brass-bright);
  text-decoration: underline;
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--panel);
  border: 1px solid var(--rule-soft);
  border-radius: 4px;
  padding: 0.1em 0.35em;
}

:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 3px;
  border-radius: 2px;
}

/* brass fails 3:1 against the paper cards; use a darker ring there */
.pilot-card :focus-visible,
.proof-col:not(.replay) :focus-visible {
  outline-color: #8a6414;
}

html[data-a11y-contrast="high"] .pilot-card :focus-visible,
html[data-a11y-contrast="high"] .proof-col:not(.replay) :focus-visible {
  outline-color: #000000;
}

/* links inside running text must not rely on color alone */
p a {
  text-decoration: underline;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--brass);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 0.75rem 1.25rem;
}

.skip-link:focus {
  left: 0;
}

/* Navigation ---------------------------------------------------------------- */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem var(--pad-x);
  background: color-mix(in srgb, var(--ink) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule-soft);
}

.nav-brand {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  color: var(--text);
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  min-height: 44px;
}

.nav-brand::before {
  content: "";
  width: 10px;
  height: 10px;
  background: var(--brass);
  border-radius: 2px;
  transform: rotate(45deg);
  flex: none;
}

.nav-brand:hover {
  text-decoration: none;
  color: var(--brass-bright);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 2.5vw, 1.75rem);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.nav-links a {
  color: var(--text-dim);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.nav-links a:hover {
  color: var(--text);
  text-decoration: none;
}

.nav-links .nav-agent {
  color: var(--ink);
  background: var(--brass);
  padding: 0.45rem 0.9rem;
  border-radius: 4px;
  font-weight: 600;
}

.nav-links .nav-agent:hover {
  background: var(--brass-bright);
  color: var(--ink);
  text-decoration: none;
}

@media (max-width: 720px) {
  /* Wrap the section links rather than hiding them: with no hamburger to fall
     back on, display:none removed the only way to reach Pilot, Proof, and
     Machine discovery on a phone. */
  .nav-links {
    flex-wrap: wrap;
    gap: 0.35rem 0.85rem;
    font-size: 0.78rem;
  }
}

@media (max-width: 560px) {
  html {
    /* the wrapped nav is taller at narrow widths */
    scroll-padding-top: 8.5rem;
  }

  .site-nav {
    flex-wrap: wrap;
    row-gap: 0.25rem;
  }

  .nav-brand {
    font-size: 0.8rem;
    letter-spacing: 0;
  }

  .nav-links .nav-agent {
    white-space: nowrap;
    padding: 0.45rem 0.7rem;
  }

  .site-footer {
    padding-bottom: 7rem;
  }
}

/* Shared section scaffolding ------------------------------------------------ */

.section {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: clamp(3.5rem, 8vw, 6rem) var(--pad-x);
}

.section-kicker {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--brass);
  border-top: 1px solid var(--rule);
  padding-top: 1rem;
  margin: 0 0 2rem;
  max-width: none;
}

.section-kicker-inverse {
  border-top-color: var(--rule-soft);
}

/* Hero ----------------------------------------------------------------------- */

.hero {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: clamp(3rem, 7vw, 5.5rem) var(--pad-x) clamp(3.5rem, 8vw, 6rem);
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(2.5rem, 5vw, 4.5rem);
  align-items: start;
}

@media (max-width: 920px) {
  .hero {
    grid-template-columns: minmax(0, 1fr);
  }
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 1.75rem;
}

.eyebrow-mark {
  width: 22px;
  height: 1px;
  background: var(--brass);
  flex: none;
}

.hero-body {
  color: var(--text-dim);
  font-size: 1.1rem;
}

.hero-body-lead {
  color: var(--text);
  font-size: clamp(1.15rem, 2vw, 1.3rem);
  font-weight: 500;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin: 2rem 0 1.25rem;
}

.email-fallback {
  font-size: 0.95rem;
  color: var(--text-dim);
}

.email-fallback a {
  overflow-wrap: anywhere;
}

.constraint-line {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-dim);
  border-top: 1px dashed var(--rule);
  padding-top: 1rem;
  margin-top: 1.5rem;
}

/* Buttons --------------------------------------------------------------------- */

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 600;
  padding: 0.85rem 1.4rem;
  min-height: 48px;
  border-radius: 5px;
  border: 1px solid transparent;
}

.button:hover {
  text-decoration: none;
}

.button-primary {
  background: var(--brass);
  color: var(--ink);
}

.button-primary:hover {
  background: var(--brass-bright);
  color: var(--ink);
  transform: translateY(-1px);
}

.button-secondary {
  border-color: var(--rule);
  color: var(--text);
}

.button-secondary:hover {
  border-color: var(--brass);
  color: var(--brass-bright);
}

/* Paper artifacts: pilot ticket + receipts ------------------------------------ */

.pilot-card,
.proof-col {
  position: relative;
  background: var(--paper);
  color: var(--paper-ink);
  border-radius: 6px 6px 0 0;
  padding: 1.75rem 1.75rem 2.25rem;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.06) inset,
    0 24px 48px -24px rgba(0, 0, 0, 0.7);
}

/* The torn edge is a receipt metaphor, so it belongs on receipts only. On the
   pilot card it read as a clipped element rather than a deliberate texture. */
.pilot-card {
  border-radius: 6px;
}

/* torn / scalloped receipt bottom edge */
.proof-col::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -7px;
  height: 8px;
  background: radial-gradient(circle at 7px -2px, transparent 7px, var(--paper) 8px);
  background-size: 15px 8px;
  background-repeat: repeat-x;
}

.pilot-card p,
.proof-col p {
  color: var(--paper-dim);
}

.pilot-card a:not(.button),
.proof-col a:not(.button) {
  color: #8a6414;
}

.pilot-card a:not(.button):hover,
.proof-col a:not(.button):hover {
  color: #6e4f0e;
}

.panel-kicker {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--paper-dim);
  margin: 0 0 0.4rem;
}

.agent-entry-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: start;
  gap: 1rem;
  border-bottom: 1px dashed var(--paper-shade);
  padding-bottom: 1rem;
  margin-bottom: 1rem;
}

.agent-entry-head h2 {
  font-size: 1.45rem;
  margin: 0;
}

.public-badge {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--paper-ink);
  border: 1px solid var(--paper-ink);
  border-radius: 999px;
  padding: 0.3rem 0.7rem;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.public-badge span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--verify);
}

.agent-entry-copy {
  font-size: 0.98rem;
}

.pilot-steps {
  list-style: none;
  margin: 1.25rem 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.pilot-steps li {
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  font-size: 0.98rem;
  border-bottom: 1px dashed var(--paper-shade);
  padding-bottom: 0.6rem;
}

.pilot-steps li span {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: #8a6414;
  flex: none;
}

.agent-entry-foot {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem 1rem;
  font-size: 0.85rem;
  color: var(--paper-dim);
  font-family: var(--font-mono);
}

.agent-entry-foot a {
  font-weight: 600;
  white-space: nowrap;
}

/* Thesis ------------------------------------------------------------------------ */

.thesis-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(2rem, 4vw, 4rem);
  margin-bottom: 3rem;
}

@media (max-width: 820px) {
  .thesis-layout {
    grid-template-columns: minmax(0, 1fr);
  }
}

.thesis-copy p {
  color: var(--text-dim);
}

.thesis-signals {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--rule-soft);
  border: 1px solid var(--rule-soft);
}

@media (max-width: 820px) {
  .thesis-signals {
    grid-template-columns: minmax(0, 1fr);
  }
}

.thesis-signals li {
  background: var(--panel);
  padding: 1.5rem;
}

.thesis-signals span {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--brass);
  display: block;
  margin-bottom: 0.75rem;
}

.thesis-signals strong {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  display: block;
  margin-bottom: 0.5rem;
}

.thesis-signals p {
  font-size: 0.95rem;
  color: var(--text-dim);
  margin: 0;
}

/* Governed loop ------------------------------------------------------------------ */

.protocol-section {
  border-top: 1px solid var(--rule-soft);
  border-bottom: 1px solid var(--rule-soft);
  background:
    repeating-linear-gradient(
      to right,
      transparent 0,
      transparent 119px,
      var(--rule-soft) 119px,
      var(--rule-soft) 120px
    );
}

.protocol-heading {
  padding-bottom: 1.5rem;
}

.protocol-heading p:not(.section-kicker) {
  color: var(--text-dim);
}

.loop-track {
  list-style: none;
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 0 var(--pad-x) clamp(3.5rem, 8vw, 5rem);
  display: grid;
  /* Four columns, not eight: each step carries a sentence of explanation, and
     eight tracks at page width squeezed single words into mid-word breaks. */
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  counter-reset: loop;
}

@media (max-width: 820px) {
  .loop-track {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 480px) {
  .loop-track {
    grid-template-columns: minmax(0, 1fr);
  }
}

.loop-track li {
  background: var(--panel);
  border: 1px solid var(--rule-soft);
  margin-left: -1px;
  margin-top: -1px;
  padding: 1.1rem 1.1rem 1.25rem;
  display: grid;
  gap: 0.45rem;
  align-content: start;
}

.loop-track li span {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--brass);
}

.loop-track li strong {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  /* Never break a step name mid-word; hyphenate properly if space runs out. */
  overflow-wrap: normal;
  word-break: keep-all;
  hyphens: auto;
}

.loop-track li p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--text-dim);
}

.loop-track li:nth-child(5) strong,
.loop-track li:nth-child(6) strong {
  color: var(--brass-bright);
}

/* Proof section -------------------------------------------------------------------- */

.proof-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  align-items: end;
  margin-bottom: 2.5rem;
}

@media (max-width: 820px) {
  .proof-heading {
    grid-template-columns: minmax(0, 1fr);
  }
}

.proof-heading p:not(.section-kicker) {
  color: var(--text-dim);
  font-size: 0.98rem;
}

.proof-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 3vw, 2.5rem);
  align-items: start;
}

@media (max-width: 820px) {
  .proof-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

.proof-label {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.6rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--paper-dim);
  border-bottom: 1px dashed var(--paper-shade);
  padding-bottom: 0.9rem;
  margin-bottom: 0.5rem;
}

.badge {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--paper-shade);
  color: var(--paper-ink);
  border-radius: 999px;
  padding: 0.3rem 0.7rem;
  white-space: nowrap;
}

.proof-col dl {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.proof-col dl .row {
  display: grid;
  grid-template-columns: minmax(9ch, max-content) minmax(0, 1fr);
  gap: 1rem;
  padding: 0.55rem 0;
  border-bottom: 1px dashed var(--paper-shade);
}

.proof-col dt {
  color: var(--paper-dim);
}

.proof-col dd {
  margin: 0;
  overflow-wrap: anywhere;
  font-weight: 500;
}

.proof-foot {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  margin: 1rem 0 0;
}

.receipt-seal {
  position: absolute;
  top: -14px;
  right: 18px;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink);
  background: var(--brass);
  border-radius: 999px;
  padding: 0.35rem 0.8rem;
  transform: rotate(2deg);
  box-shadow: 0 6px 16px -6px rgba(0, 0, 0, 0.6);
  max-width: calc(100% - 2rem);
}

/* dark info card variant (right column of proof, downloads, etc.) */
.proof-col.replay {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--rule-soft);
  border-radius: 6px;
  box-shadow: none;
}

.proof-col.replay::after {
  display: none;
}

.proof-col.replay p {
  color: var(--text-dim);
}

.proof-col.replay .proof-label {
  color: var(--text-dim);
  border-bottom-color: var(--rule-soft);
}

.proof-col.replay .badge {
  background: var(--rule-soft);
  color: var(--text);
}

.proof-col.replay a:not(.button) {
  color: var(--brass);
}

.proof-col.replay a:not(.button):hover {
  color: var(--brass-bright);
}

.text-link {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
}

/* Pilot & machine sections ------------------------------------------------------------ */

.pilot-copy p {
  color: var(--text-dim);
  font-size: 1.05rem;
}

.pilot-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem;
  margin-top: 1.75rem;
}

.machine-heading p:not(.section-kicker) {
  color: var(--text-dim);
}

.machine-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--rule-soft);
  border: 1px solid var(--rule-soft);
  margin-top: 2rem;
}

@media (max-width: 720px) {
  .machine-links {
    grid-template-columns: minmax(0, 1fr);
  }
}

.machine-links a {
  background: var(--panel);
  color: var(--text);
  padding: 1.25rem 1.5rem;
  display: grid;
  gap: 0.4rem;
}

.machine-links a:hover {
  background: var(--rule-soft);
  text-decoration: none;
}

.machine-links a > span {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.02rem;
}

/* Marks the raw-JSON endpoints, which leave the site for the API origin. */
.machine-links .ext {
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 0.85rem;
  color: var(--brass);
}

.machine-note {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-dim);
  margin: 1rem 0 0;
  max-width: none;
}

.machine-links code {
  background: none;
  border: none;
  padding: 0;
  color: var(--text-dim);
  font-size: 0.85rem;
}

/* Honest limitations ------------------------------------------------------------------- */

.boundary-section {
  border-top: 1px solid var(--rule-soft);
}

.boundary-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(2rem, 4vw, 4rem);
}

@media (max-width: 820px) {
  .boundary-layout {
    grid-template-columns: minmax(0, 1fr);
  }
}

.boundary-layout ul {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.98rem;
  color: var(--text-dim);
}

.boundary-layout li {
  border-bottom: 1px dashed var(--rule);
  padding: 0.8rem 0;
  display: flex;
  gap: 0.75rem;
  align-items: baseline;
}

.boundary-layout li::before {
  content: "✕" / "";
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--danger);
  flex: none;
}

/* Who's behind this + closing call to action ---------------------------------------------- */

.provenance-section {
  border-top: 1px solid var(--rule-soft);
}

.provenance-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  align-items: start;
}

@media (max-width: 820px) {
  .provenance-layout {
    grid-template-columns: minmax(0, 1fr);
  }
}

.provenance-copy p {
  color: var(--text-dim);
}

.closing-cta {
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: clamp(1.5rem, 3vw, 2.25rem);
  display: grid;
  gap: 1rem;
  align-content: start;
}

.closing-cta h2 {
  font-size: clamp(1.4rem, 2.6vw, 1.9rem);
  margin: 0;
}

.closing-cta p {
  color: var(--text-dim);
  margin: 0;
}

.closing-cta .pilot-links {
  margin-top: 0.25rem;
}

/* Footer ---------------------------------------------------------------------------------- */

.site-footer {
  border-top: 1px solid var(--rule-soft);
  margin-top: clamp(3rem, 7vw, 5rem);
  padding: clamp(2.5rem, 6vw, 4rem) var(--pad-x);
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) repeat(3, minmax(0, 1fr));
  gap: 2.5rem;
  max-width: var(--page-max);
  margin-left: auto;
  margin-right: auto;
}

@media (max-width: 1000px) {
  .site-footer {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .site-footer {
    grid-template-columns: minmax(0, 1fr);
  }
}

.footer-brand {
  font-family: var(--font-mono);
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.footer-branding p {
  color: var(--text-dim);
  font-size: 0.95rem;
}

.footer-directory {
  display: grid;
  gap: 0.5rem;
  align-content: start;
  font-size: 0.95rem;
}

.footer-directory p {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin: 0 0 0.5rem;
}

.footer-directory a {
  color: var(--text);
  width: fit-content;
}

.footer-directory a:hover {
  color: var(--brass-bright);
}

.footer-directory .button-primary,
.footer-directory .button-primary:hover {
  color: var(--ink);
}

.footer-directory span {
  color: var(--text-dim);
  font-size: 0.88rem;
}

.footer-note {
  grid-column: 1 / -1;
  border-top: 1px dashed var(--rule);
  padding-top: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-dim);
  max-width: none;
  margin: 0;
}

/* Proof page ------------------------------------------------------------------------------- */

.proof-page-header h1 {
  margin-top: 0.5rem;
}

.proof-page-lead {
  color: var(--text-dim);
  font-size: 1.08rem;
}

.artifact-downloads .button {
  width: 100%;
  margin-top: 0.75rem;
}

.verify-section pre {
  background: var(--ink);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 1.5rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--text);
  max-width: 100%;
}

.verify-section pre:focus-visible {
  outline: var(--focus-ring);
}

.verify-section code {
  background: none;
  border: none;
  padding: 0;
}

/* Comparison page ------------------------------------------------------------------------- */

/* The matrix is wider than a phone. It scrolls inside its own region rather
   than making the whole page scroll sideways; the region is focusable so the
   scroll is reachable by keyboard. */
.compare-scroll {
  overflow-x: auto;
  margin-top: 2rem;
  border: 1px solid var(--rule);
  border-radius: 6px;
}

.compare-scroll:focus-visible {
  outline: var(--focus-ring);
}

.compare-table {
  border-collapse: collapse;
  width: 100%;
  min-width: 46rem;
  font-size: 0.92rem;
}

.compare-table caption {
  caption-side: bottom;
  padding: 1rem 1.25rem;
  text-align: left;
  color: var(--text-dim);
  font-size: 0.82rem;
  line-height: 1.6;
}

.compare-table th,
.compare-table td {
  border-bottom: 1px solid var(--rule-soft);
  padding: 0.85rem 1.25rem;
  text-align: left;
  vertical-align: top;
}

.compare-table thead th {
  border-bottom: 1px solid var(--rule);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.compare-table tbody th {
  color: var(--text);
  font-weight: 600;
  width: 30%;
}

.compare-table tbody td {
  color: var(--text-dim);
}

.compare-table tbody tr:last-child th,
.compare-table tbody tr:last-child td {
  border-bottom: none;
}

.compare-table strong {
  color: var(--text);
}

.fit-list {
  margin: 0.5rem 0 0;
  padding-left: 1.1rem;
  display: grid;
  gap: 0.7rem;
}

.fit-list li {
  color: var(--text-dim);
  line-height: 1.65;
}

.faq-list {
  margin-top: 2rem;
  display: grid;
  gap: 1.75rem;
}

.faq-list dt {
  color: var(--text);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.faq-list dd {
  margin: 0;
  color: var(--text-dim);
  line-height: 1.75;
  max-width: 62ch;
}

/* Hero entrance (motion is opt-out via media query + a11y panel) --------------------------- */

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-copy > * {
  animation: rise 0.55s cubic-bezier(0.2, 0.7, 0.2, 1) backwards;
}

.hero-copy > *:nth-child(1) { animation-delay: 0.05s; }
.hero-copy > *:nth-child(2) { animation-delay: 0.12s; }
.hero-copy > *:nth-child(3) { animation-delay: 0.19s; }
.hero-copy > *:nth-child(4) { animation-delay: 0.26s; }
.hero-copy > *:nth-child(5) { animation-delay: 0.33s; }
.hero-copy > *:nth-child(6) { animation-delay: 0.4s; }
.hero-copy > *:nth-child(7) { animation-delay: 0.47s; }

.pilot-card {
  animation: rise 0.55s cubic-bezier(0.2, 0.7, 0.2, 1) 0.3s backwards;
}

/* Accessibility widget ----------------------------------------------------------------------- */

.amw-a11y-toggle {
  position: fixed;
  right: 1.1rem;
  bottom: 1.1rem;
  z-index: 90;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 1px solid var(--rule);
  background: var(--panel);
  color: var(--text);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
  cursor: pointer;
  box-shadow: 0 12px 32px -12px rgba(0, 0, 0, 0.8);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.amw-a11y-toggle:hover {
  border-color: var(--brass);
  color: var(--brass-bright);
}

.amw-a11y-panel {
  position: fixed;
  right: 1.1rem;
  bottom: 5.4rem;
  z-index: 91;
  width: min(320px, calc(100vw - 2.2rem));
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 8px;
  box-shadow: 0 24px 60px -20px rgba(0, 0, 0, 0.85);
  padding: 1.1rem 1.1rem 0.9rem;
  font-size: 0.92rem;
  max-height: calc(100vh - 7rem);
  max-height: calc(100dvh - 7rem);
  overflow-y: auto;
}

.amw-a11y-panel[hidden] {
  display: none;
}

.amw-a11y-panel h2 {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin: 0 0 0.9rem;
}

.amw-a11y-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.55rem 0;
  border-top: 1px dashed var(--rule-soft);
}

.amw-a11y-row > span:first-child {
  color: var(--text);
}

.amw-a11y-size {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.amw-a11y-size output {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-dim);
  min-width: 4ch;
  text-align: center;
}

.amw-a11y-size button,
.amw-a11y-switch {
  min-width: 44px;
  min-height: 44px;
  border-radius: 5px;
  border: 1px solid var(--rule);
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  cursor: pointer;
}

.amw-a11y-size button:hover,
.amw-a11y-switch:hover {
  border-color: var(--brass);
}

.amw-a11y-switch[aria-pressed="true"] {
  background: var(--brass);
  border-color: var(--brass);
  color: var(--ink);
  font-weight: 600;
}

.amw-a11y-reset {
  margin-top: 0.75rem;
  width: 100%;
  min-height: 40px;
  border-radius: 5px;
  border: 1px dashed var(--rule);
  background: none;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  cursor: pointer;
}

.amw-a11y-reset:hover {
  color: var(--text);
  border-color: var(--text-dim);
}

@media (max-width: 560px) {
  .amw-a11y-panel {
    bottom: 5.2rem;
  }
}

/* Print --------------------------------------------------------------------------------------- */

@media print {
  :root {
    --ink: #ffffff;
    --panel: #ffffff;
    --rule: #999999;
    --rule-soft: #bbbbbb;
    --text: #000000;
    --text-dim: #333333;
    --brass: #000000;
    --brass-bright: #000000;
    --verify: #000000;
    --paper: #ffffff;
    --paper-shade: #dddddd;
    --paper-ink: #000000;
    --paper-dim: #333333;
  }

  body {
    background: #fff;
    color: #000;
  }

  .site-nav,
  .amw-a11y-toggle,
  .amw-a11y-panel {
    display: none;
  }

  .pilot-card,
  .proof-col {
    border: 1px solid #999;
    box-shadow: none;
  }
}