/* VerifiedDesk — verification terminal design system (dark, 2026-07)
   Variable semantics: --paper = page ground (dark), --ink = primary text (light).
   Contrast sections (.section-dark) are LIGHT lumen panels; inline styles across
   pages rely on the ink/paper pairing, so keep that inversion intact. */

:root {
  --ink: #e9effb;
  --ink-soft: #c2cce4;
  --paper: #060a13;
  --sheet: #0c1322;
  --slate: #93a1c0;
  --line: rgba(151, 169, 213, 0.16);
  --highlight: rgba(108, 140, 255, 0.32);
  --pulse: #6c8cff;
  --pulse-deep: #4e6ff0;
  --verified: #3be8a0;
  --dropped: #ff6b5e;
  --catchall: #f5c36b;
  --lumen: #dfe7fb;
  --lumen-2: #c7d5f6;

  --font-display: "Space Grotesk", "Helvetica Neue", Arial, sans-serif;
  --font-body: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", "SF Mono", Menlo, monospace;

  --col: 1080px;
  --pad: clamp(20px, 4vw, 48px);
  --radius: 10px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* ambient field: dot grid + two soft data-glows */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(820px 540px at 12% -6%, rgba(108, 140, 255, 0.14), transparent 60%),
    radial-gradient(700px 480px at 96% 12%, rgba(59, 232, 160, 0.05), transparent 55%),
    radial-gradient(rgba(151, 169, 213, 0.10) 1px, transparent 1px);
  background-size: auto, auto, 26px 26px;
}

a { color: var(--ink); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--pulse); }

:focus-visible {
  outline: 3px solid var(--pulse);
  outline-offset: 2px;
  border-radius: 4px;
}

::selection { background: rgba(108, 140, 255, 0.45); color: #ffffff; }

.wrap {
  max-width: var(--col);
  margin: 0 auto;
  padding-left: var(--pad);
  padding-right: var(--pad);
}

/* ---------- header ---------- */

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(6, 10, 19, 0.82);
}

.site-header .wrap {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-top: 18px;
  padding-bottom: 18px;
  flex-wrap: wrap;
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.logo .tick {
  color: var(--verified);
  text-shadow: 0 0 14px rgba(59, 232, 160, 0.65);
}

.site-nav { display: flex; gap: 22px; flex-wrap: wrap; }

.site-nav a {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--slate);
}

.site-nav a:hover { color: var(--ink); }
.site-nav a[aria-current="page"] { color: var(--ink); box-shadow: inset 0 -8px 0 var(--highlight); }

/* ---------- hero ---------- */

.hero { padding: clamp(48px, 8vw, 100px) 0 clamp(40px, 6vw, 72px); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--pulse);
  margin: 0 0 18px;
}

h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(34px, 5.6vw, 64px);
  line-height: 1.03;
  letter-spacing: -0.025em;
  margin: 0 0 22px;
  max-width: 17ch;
}

h1 .hl { box-shadow: inset 0 -0.34em 0 var(--highlight); }

.lede {
  font-size: clamp(17px, 2vw, 20px);
  max-width: 58ch;
  color: var(--ink-soft);
  margin: 0 0 30px;
}

.cta-row { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }

.btn {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 14px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(12, 19, 34, 0.6);
}

.btn-primary {
  background: linear-gradient(135deg, var(--pulse), var(--pulse-deep));
  color: #ffffff;
  border-color: transparent;
}
.btn-primary:hover { background: linear-gradient(135deg, #7f9bff, var(--pulse)); }
.btn-ghost:hover { border-color: var(--pulse); }

.cta-note { font-family: var(--font-mono); font-size: 13px; color: var(--slate); }

/* ---------- ledger (signature: the live verification terminal) ---------- */

.ledger-block { padding-bottom: clamp(48px, 7vw, 88px); }

.ledger {
  position: relative;
  background: linear-gradient(180deg, rgba(17, 27, 48, 0.92), rgba(12, 19, 34, 0.92));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.05) inset, 0 24px 60px rgba(2, 5, 12, 0.6);
  overflow: hidden;
  overflow-x: auto;
}

/* scanline: the desk is always verifying */
.ledger::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: -20%;
  height: 22%;
  pointer-events: none;
  background: linear-gradient(180deg, transparent, rgba(59, 232, 160, 0.07) 45%, rgba(59, 232, 160, 0.16) 50%, rgba(59, 232, 160, 0.07) 55%, transparent);
  animation: vd-scan 7s linear infinite;
}

@keyframes vd-scan {
  from { transform: translateY(-40%); }
  to { transform: translateY(560%); }
}

.ledger table { min-width: 640px; }

.ledger-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 18px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--slate);
  flex-wrap: wrap;
}

.ledger table { width: 100%; border-collapse: collapse; }

.ledger th {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-align: left;
  color: var(--slate);
  font-weight: 500;
  padding: 10px 18px;
  border-bottom: 1px solid var(--line);
}

.ledger td {
  font-size: 15px;
  padding: 12px 18px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.ledger tr:last-child td { border-bottom: 0; }

.ledger .mono { font-family: var(--font-mono); font-size: 13px; color: var(--ink-soft); }

.stamp {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.07em;
  padding: 3px 8px;
  border: 1.5px solid currentColor;
  border-radius: 5px;
  white-space: nowrap;
  box-shadow: 0 0 14px -5px currentColor;
}

.stamp-verified { color: var(--verified); }
.stamp-catchall { color: var(--catchall); }
.stamp-dropped { color: var(--dropped); }

tr.is-dropped td { color: var(--dropped); }
tr.is-dropped .strikeable { text-decoration: line-through; text-decoration-thickness: 1.5px; }

.ledger-foot {
  padding: 12px 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--slate);
  border-top: 1px solid var(--line);
}

.ledger-foot strong { color: var(--dropped); font-weight: 600; }

/* ---------- sections ---------- */

.section { padding: clamp(44px, 7vw, 84px) 0; border-top: 1px solid var(--line); }

/* lumen panel: the light contrast block on a dark site */
.section-dark {
  background: linear-gradient(180deg, var(--lumen), var(--lumen-2));
  color: var(--paper);
  border-top: 0;
  box-shadow: 0 0 0 1px rgba(108, 140, 255, 0.25), 0 -30px 80px -40px rgba(108, 140, 255, 0.35), 0 30px 80px -40px rgba(108, 140, 255, 0.35);
}

.section-dark a { color: var(--paper); }
.section-dark a:hover { text-decoration-color: var(--pulse-deep); }
.section-dark .eyebrow { color: #3d55a8; }

h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 3.6vw, 40px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
  max-width: 24ch;
}

h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 21px;
  margin: 0 0 10px;
}

.section p { max-width: 62ch; }

/* ---------- service sheets ---------- */

.sheet-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-top: 36px;
}

.sheet-grid-3 { grid-template-columns: repeat(3, 1fr); gap: 20px; }

@media (max-width: 960px) {
  .sheet-grid-3 { grid-template-columns: 1fr; }
}

@media (max-width: 800px) {
  .sheet-grid { grid-template-columns: 1fr; }
}

.sheet {
  background: linear-gradient(180deg, rgba(17, 27, 48, 0.85), rgba(12, 19, 34, 0.85));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.04) inset, 0 14px 40px rgba(2, 5, 12, 0.45);
}

.section-dark .sheet {
  background: rgba(255, 255, 255, 0.72);
  border-color: rgba(11, 19, 39, 0.14);
  box-shadow: 0 14px 40px rgba(30, 48, 110, 0.18);
}

.sheet .sku {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--pulse);
  margin: 0 0 12px;
}

.section-dark .sheet .sku { color: #3d55a8; }

.sheet p { margin-top: 0; }

.spec {
  margin: 18px 0 22px;
  border-top: 1px solid var(--line);
}

.spec-row {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
}

.section-dark .spec, .section-dark .spec-row { border-color: rgba(11, 19, 39, 0.16); }

.spec-row dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--slate);
  padding-top: 3px;
}

.section-dark .spec-row dt { color: #46557b; }

.spec-row dd { margin: 0; }

.sheet .btn { margin-top: auto; align-self: flex-start; }

/* ---------- process ---------- */

.steps {
  counter-reset: step;
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.steps li {
  counter-increment: step;
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 18px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

.section-dark .steps li { border-top-color: rgba(11, 19, 39, 0.16); }

.steps li::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 26px;
  color: var(--pulse);
  line-height: 1.2;
}

.section-dark .steps li::before { color: #3d55a8; }

.steps h3 { margin-bottom: 6px; }
.steps p { margin: 0; font-size: 16px; }
.section-dark .steps p { color: #2c3a5c; }

/* ---------- tiers ---------- */

.tiers { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 32px; }

@media (max-width: 800px) { .tiers { grid-template-columns: 1fr; } }

.tier {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(17, 27, 48, 0.85), rgba(12, 19, 34, 0.85));
  padding: 22px;
}

.tier .stamp { margin-bottom: 12px; }
.tier p { font-size: 15px; margin: 8px 0 0; }

/* ---------- faq ---------- */

.faq-list { margin-top: 28px; }

.faq-list details {
  border-top: 1px solid var(--line);
  padding: 4px 0;
}

.faq-list details:last-child { border-bottom: 1px solid var(--line); }

.faq-list summary {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 16px;
}

.faq-list summary::-webkit-details-marker { display: none; }

.faq-list summary::after {
  content: "+";
  font-family: var(--font-mono);
  color: var(--pulse);
  flex-shrink: 0;
}

.faq-list details[open] summary::after { content: "\2212"; }

.faq-list .answer { padding: 0 0 18px; max-width: 62ch; color: var(--ink-soft); }
.faq-list .answer p { margin-top: 0; }

/* ---------- prose (guides) ---------- */

.prose { max-width: 68ch; }
.prose h2 { margin-top: 44px; }
.prose h3 { margin-top: 30px; }
.prose blockquote {
  margin: 24px 0;
  padding: 4px 0 4px 20px;
  border-left: 3px solid var(--pulse);
  color: var(--ink-soft);
}
.prose .meta {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--slate);
  margin-bottom: 28px;
}
.prose .src {
  font-size: 14px;
  color: var(--slate);
}
.prose table { width: 100%; border-collapse: collapse; font-size: 15px; margin: 20px 0; }
.prose th, .prose td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); }
.prose th { font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.07em; color: var(--slate); }

.guide-list { list-style: none; margin: 32px 0 0; padding: 0; }
.guide-list li { border-top: 1px solid var(--line); padding: 20px 0; }
.guide-list a { font-family: var(--font-display); font-weight: 600; font-size: 20px; text-decoration: none; }
.guide-list a:hover { box-shadow: inset 0 -10px 0 var(--highlight); }
.guide-list p { margin: 8px 0 0; font-size: 16px; color: var(--ink-soft); }

/* ---------- footer ---------- */

.site-footer {
  border-top: 1px solid var(--line);
  background: #0a101f;
  color: var(--ink);
  padding: 44px 0;
}

.site-footer .wrap {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.site-footer a { color: var(--ink); }

.foot-brand { font-family: var(--font-display); font-weight: 700; font-size: 19px; margin: 0 0 8px; }
.foot-brand .tick { color: var(--verified); text-shadow: 0 0 14px rgba(59, 232, 160, 0.65); }

.site-footer p { margin: 0 0 6px; font-size: 15px; color: var(--slate); max-width: 44ch; }

.foot-nav { display: grid; gap: 8px; font-family: var(--font-mono); font-size: 13px; text-transform: uppercase; letter-spacing: 0.04em; }
.foot-nav a { color: var(--slate); text-decoration: none; }
.foot-nav a:hover { color: var(--ink); }

/* ================= motion system (js/site.js) ================= */

@view-transition { navigation: auto; }
::view-transition-old(root) { animation-duration: 0.18s; }
::view-transition-new(root) { animation-duration: 0.26s; }

/* sticky glass header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: box-shadow 0.25s ease;
}
.site-header.vd-stuck { box-shadow: 0 1px 0 rgba(108, 140, 255, 0.25), 0 12px 32px rgba(2, 5, 12, 0.5); }

/* nav underline sweep */
.site-nav a {
  background-image: linear-gradient(var(--pulse), var(--pulse));
  background-repeat: no-repeat;
  background-size: 0% 2px;
  background-position: 0 100%;
  transition: background-size 0.25s cubic-bezier(0.2, 0.7, 0.2, 1), color 0.2s ease;
}
.site-nav a:hover { background-color: transparent; background-size: 100% 2px; }

/* buttons: glow lift */
.btn {
  transition: transform 0.16s ease, box-shadow 0.16s ease, background 0.16s ease, border-color 0.16s ease;
  will-change: transform;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 10px 28px -8px rgba(108, 140, 255, 0.55); }
.btn:active { transform: translateY(0); box-shadow: none; }
.section-dark .btn:hover { box-shadow: 0 10px 28px -8px rgba(30, 48, 110, 0.5); }

/* cards lift */
.sheet, .tier {
  transition: transform 0.22s cubic-bezier(0.2, 0.7, 0.2, 1), box-shadow 0.22s cubic-bezier(0.2, 0.7, 0.2, 1), border-color 0.22s ease;
}
.sheet:hover, .tier:hover {
  transform: translateY(-4px);
  border-color: rgba(108, 140, 255, 0.45);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.05) inset, 0 22px 54px -12px rgba(108, 140, 255, 0.3);
}
.section-dark .sheet:hover { box-shadow: 0 22px 54px -12px rgba(30, 48, 110, 0.35); }

/* guide list hover nudge */
.guide-list a { transition: box-shadow 0.22s cubic-bezier(0.2, 0.7, 0.2, 1); }

/* FAQ marker rotation */
.faq-list summary::after { transition: transform 0.25s ease, color 0.25s ease; }
.faq-list details[open] summary::after { transform: rotate(180deg); color: var(--ink); }
.section-dark .faq-list details[open] summary::after { color: var(--paper); }

/* hero entrance */
.vd-hero-armed .vd-hero-item {
  opacity: 0;
  transform: translateY(16px);
}
.vd-hero-go .vd-hero-item {
  opacity: 1;
  transform: none;
  transition: opacity 0.6s cubic-bezier(0.2, 0.7, 0.2, 1), transform 0.6s cubic-bezier(0.2, 0.7, 0.2, 1);
  transition-delay: calc(var(--vd-i, 0) * 110ms);
}

/* scroll reveals */
.vd-reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.65s cubic-bezier(0.2, 0.7, 0.2, 1), transform 0.65s cubic-bezier(0.2, 0.7, 0.2, 1);
  transition-delay: calc(var(--vd-i, 0) * 80ms);
}
.vd-reveal.vd-in { opacity: 1; transform: none; }

/* highlight sweep (js swaps static box-shadow for painted sweep) */
.vd-hl {
  box-shadow: none !important;
  background-image: linear-gradient(var(--highlight), var(--highlight));
  background-repeat: no-repeat;
  background-size: 0% 0.36em;
  background-position: 0 88%;
  transition: background-size 0.7s cubic-bezier(0.2, 0.7, 0.2, 1) 0.35s;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}
.vd-hl-in { background-size: 100% 0.36em; }

/* ledger verification sequence */
.vd-ledger-armed tbody tr {
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.4s ease-out, transform 0.4s ease-out;
}
.vd-ledger-armed tbody tr.vd-row-in { opacity: 1; transform: none; }

.vd-ledger-armed .stamp {
  opacity: 0;
  transform: scale(1.7) rotate(-7deg);
}
.vd-ledger-armed .stamp.vd-stamp-in {
  opacity: 1;
  transform: scale(1) rotate(0deg);
  transition: opacity 0.16s ease-out, transform 0.34s cubic-bezier(0.2, 1.6, 0.4, 1);
}

.vd-ledger-armed tr.is-dropped .strikeable {
  text-decoration: none;
  background-image: linear-gradient(currentColor, currentColor);
  background-repeat: no-repeat;
  background-size: 0% 1.5px;
  background-position: 0 58%;
  transition: background-size 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}
.vd-ledger-armed tr.is-dropped.vd-struck .strikeable { background-size: 100% 1.5px; }

.vd-ledger-armed .ledger-foot {
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.vd-ledger-armed .ledger-foot.vd-in { opacity: 1; transform: none; }

/* reduced motion: kill everything */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn, .sheet, .tier, .site-nav a, .site-header { transition: none; }
  .btn:hover, .sheet:hover, .tier:hover { transform: none; }
  .ledger::after { animation: none; display: none; }
}

/* ================= inline data visuals (charts + diagrams) ================= */

.vd-fig-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 32px;
}

@media (max-width: 960px) { .vd-fig-grid { grid-template-columns: 1fr; } }

.vd-fig {
  margin: 0;
  background: linear-gradient(180deg, rgba(17, 27, 48, 0.85), rgba(12, 19, 34, 0.85));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.04) inset, 0 14px 40px rgba(2, 5, 12, 0.45);
}

.vd-fig-head {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--slate);
  margin-bottom: 12px;
}

.vd-fig-head .codename { color: var(--ink); font-weight: 600; }

.vd-fig svg { width: 100%; height: auto; display: block; }

.vd-fig-caption {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.55;
  color: var(--slate);
  margin-top: 12px;
}

.vd-fig-note {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--slate);
  max-width: 74ch;
  margin-top: 22px;
}

/* diagrams: full-width conceptual flows; scroll horizontally on small screens
   like the ledger does, so labels never shrink below legibility */
.vd-diagram {
  margin: 32px 0 0;
  background: linear-gradient(180deg, rgba(17, 27, 48, 0.85), rgba(12, 19, 34, 0.85));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  overflow-x: auto;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.04) inset, 0 14px 40px rgba(2, 5, 12, 0.45);
}

.vd-diagram svg { min-width: 640px; width: 100%; height: auto; display: block; }

.section-dark .vd-fig,
.section-dark .vd-diagram {
  background: rgba(255, 255, 255, 0.72);
  border-color: rgba(11, 19, 39, 0.14);
  box-shadow: 0 14px 40px rgba(30, 48, 110, 0.18);
}