/* ==========================================================================
   Auditable — marketing site
   Concept: "the audit file, printed" — warm paper, navy ink, one green accent,
   serif voice (Newsreader) + mono annotations (IBM Plex Mono), hairline rules.
   ========================================================================== */

/* ---------- tokens ---------- */
:root {
  /* palette — derived from the logo (#1D2F47 ink, #8BC53F→#2EAD4B check) */
  --paper: #F7F4EC;
  --card: #FCFBF7;
  --ink: #1D2F47;
  --body: #333F55;
  --muted: #5F6879;
  --line: #E3DCCB;
  --line-strong: #C9BFA8;
  --green: #1E6B44;        /* text-safe accent (5.9:1 on paper) */
  --green-bright: #2EAD4B; /* logo green — large marks only, never text on paper */
  --amber: #916007;        /* "review" status (4.9:1 on paper) */
  --amber-tint: rgba(145, 96, 7, 0.06);
  --navy-band: #16233B;
  --cream: #F3EFE4;
  --cream-muted: #B8BFCC;

  /* type */
  --serif: "Newsreader", "Iowan Old Style", Georgia, "Times New Roman", serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* layout */
  --wrap: 1140px;
  --gutter: clamp(1.25rem, 4vw, 2.5rem);
}

/* ---------- reset (lite) ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; }
img, svg { display: block; max-width: 100%; }
input, button, textarea, select { font: inherit; }

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

/* ---------- base ---------- */
html, body { overflow-x: clip; }

body {
  background: var(--paper);
  color: var(--body);
  font-family: var(--serif);
  font-optical-sizing: auto;
  font-size: 1.0625rem; /* 17px */
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

::selection { background: rgba(46, 173, 75, 0.22); }

h1, h2, h3 {
  color: var(--ink);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -0.012em;
  text-wrap: balance;
}
h1 em, h2 em { font-style: italic; font-weight: 500; }

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

:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 3px;
  border-radius: 1px;
}

.wrap {
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; left: var(--gutter); top: -100%;
  z-index: 100; padding: 0.6rem 1rem;
  background: var(--ink); color: var(--paper);
  font-family: var(--mono); font-size: 0.8125rem;
}
.skip-link:focus { top: 0.5rem; }

/* ---------- shared components ---------- */
.overline {
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}
.overline .sec-no {
  color: var(--green);
  margin-right: 1em;
}
.overline-dark { color: var(--cream-muted); }

.btn {
  display: inline-block;
  padding: 0.9rem 1.5rem;
  border: 1px solid transparent;
  border-radius: 2px;
  font-family: var(--mono);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  text-decoration: none;
  transition: background-color 160ms ease, color 160ms ease, border-color 160ms ease;
}
.btn-small { padding: 0.55rem 1rem; font-size: 0.75rem; }
.btn-ink { background: var(--ink); color: var(--paper); }
.btn-ink:hover { background: var(--green); color: #fff; }
.btn-paper { background: var(--cream); color: var(--ink); }
.btn-paper:hover { background: var(--green-bright); color: var(--navy-band); }

.link-quiet {
  font-family: var(--mono);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: var(--ink);
  text-decoration-color: var(--line-strong);
}
.link-quiet:hover { color: var(--green); text-decoration-color: currentColor; }
.link-quiet-dark { color: var(--cream); }
.link-quiet-dark:hover { color: var(--green-bright); }

/* ---------- header ---------- */
.site-head {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--paper);
  border-bottom: 1px solid transparent;
  transition: border-color 200ms ease;
}
.site-head.scrolled { border-bottom-color: var(--line); }

.head-inner {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding-block: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  margin-right: auto;
}
.brand-name {
  font-family: var(--serif);
  font-size: 1.35rem;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}
.site-nav > a:not(.btn) {
  font-family: var(--mono);
  font-size: 0.8125rem;
  letter-spacing: 0.05em;
  color: var(--body);
  text-decoration: none;
}
.site-nav > a:not(.btn):hover { color: var(--green); }
.nav-signin { color: var(--ink) !important; }
.nav-signin::after { content: " \2192"; }

.lang {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}
.lang a {
  color: var(--muted);
  text-decoration: none;
}
.lang a:hover { color: var(--green); }
.lang a[aria-current] {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  padding: 0.45rem 0.9rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink);
  cursor: pointer;
}

/* ---------- hero ---------- */
.hero { padding-block: clamp(3.5rem, 8vw, 7rem) clamp(4rem, 9vw, 7.5rem); }

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: clamp(2.5rem, 6vw, 5rem);
  align-items: center;
}

.hero-copy .overline { margin-bottom: 1.5rem; }

h1 {
  font-size: clamp(2.7rem, 5.4vw, 4.35rem);
  margin-bottom: 1.5rem;
}

.lede {
  font-size: clamp(1.125rem, 1.6vw, 1.3125rem);
  line-height: 1.55;
  max-width: 34em;
  margin-bottom: 2.25rem;
}

.cta-row {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  flex-wrap: wrap;
}

.hero-note {
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ---------- specimen card ---------- */
.hero-visual { position: relative; }

.specimen {
  position: relative;
  container-type: inline-size;
  background: var(--card);
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  padding: 1.1rem 1.25rem 1rem;
  box-shadow: 0 1px 0 rgba(29, 47, 71, 0.04);
}

.specimen-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-family: var(--mono);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink);
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--ink);
}

.ledger {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 0.8125rem;
  font-variant-numeric: tabular-nums;
}
.ledger th {
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  text-align: left;
  padding: 0.7rem 0.5rem 0.45rem 0;
  border-bottom: 1px solid var(--line);
}
.ledger td {
  padding: 0.62rem 0.5rem 0.62rem 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  white-space: nowrap;
}
.ledger tbody tr:last-child td { border-bottom: none; }
.ledger .num { text-align: right; }
.ledger th.num { text-align: right; }
.ledger .status-col { text-align: right; padding-right: 0; padding-left: 1rem; }
.ledger th.status-col { padding-right: 0; }

.mark-ok, .mark-review {
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
}
.mark-ok { color: var(--green); }
.mark-review {
  color: var(--amber);
  font-size: 0.75rem;
  font-weight: 600;
}
.row-flag td { background: var(--amber-tint); }

/* The specimen adapts to ITS OWN width — font metrics, browsers and
   translations vary. On a narrow card, the type tightens. */
@container (max-width: 400px) {
  .ledger { font-size: 0.75rem; }
}

.specimen-foot {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.625rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.annotation {
  position: absolute;
  right: 0.75rem;
  bottom: -3.4rem;
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.0625rem;
  color: var(--green);
  transform: rotate(-2deg);
}
.annotation em { font-weight: 600; }
.annotation-arrow { flex-shrink: 0; margin-top: -0.9rem; }

/* ---------- 01 claim ---------- */
.claim {
  border-block: 1px solid var(--line);
  background: linear-gradient(var(--card), var(--card));
  padding-block: clamp(4rem, 8vw, 6.5rem);
}
.claim-inner {
  max-width: 54rem;
  text-align: center;
}
.claim h2 {
  font-size: clamp(1.9rem, 3.6vw, 2.9rem);
  margin-block: 1.5rem 1.25rem;
}
.claim-sub {
  max-width: 42em;
  margin-inline: auto;
  color: var(--muted);
}

/* ---------- section scaffolding ---------- */
.platform, .method, .security { padding-block: clamp(4.5rem, 9vw, 7.5rem); }

.sec-head { max-width: 44rem; margin-bottom: clamp(2.5rem, 5vw, 4rem); }
.sec-head h2 {
  font-size: clamp(1.9rem, 3.4vw, 2.7rem);
  margin-block: 1.25rem 0.9rem;
}
.sec-sub { color: var(--muted); }

/* ---------- 02 platform modules ---------- */
.modules {
  list-style: none;
  padding: 0;
  border-top: 1px solid var(--line-strong);
}
.module {
  display: grid;
  grid-template-columns: 6rem minmax(0, 1fr);
  gap: 1rem 2rem;
  padding-block: 2.1rem;
  border-bottom: 1px solid var(--line);
}
.module-no {
  font-family: var(--mono);
  font-size: 0.8125rem;
  color: var(--green);
  padding-top: 0.5rem;
}
.module h3 { font-size: 1.45rem; display: inline; }
.module-tag {
  display: inline;
  margin-left: 0.75rem;
  font-size: 1.05rem;
  color: var(--muted);
}
.module-body > p:not(.module-tag):not(.module-spec) {
  max-width: 46em;
  margin-top: 0.7rem;
}
.module-spec {
  margin-top: 0.9rem;
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ---------- placeholder panel (crop marks + hatch) ---------- */
.placeholder-panel {
  position: relative;
  margin-top: clamp(2.5rem, 5vw, 4rem);
  aspect-ratio: 16 / 8.5;
  border: 1px solid var(--line-strong);
  background:
    repeating-linear-gradient(45deg,
      transparent 0 12px,
      rgba(29, 47, 71, 0.035) 12px 13px);
  display: grid;
  place-items: center;
}
.placeholder-chip {
  border: 1px solid var(--line-strong);
  background: var(--paper);
  padding: 0.55rem 1rem;
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}
.crop {
  position: absolute;
  width: 14px; height: 14px;
  border-color: var(--ink);
  border-style: solid;
  border-width: 0;
}
.crop.tl { top: -8px; left: -8px; border-left-width: 1px; border-top-width: 1px; }
.crop.tr { top: -8px; right: -8px; border-right-width: 1px; border-top-width: 1px; }
.crop.bl { bottom: -8px; left: -8px; border-left-width: 1px; border-bottom-width: 1px; }
.crop.br { bottom: -8px; right: -8px; border-right-width: 1px; border-bottom-width: 1px; }

/* ---------- 03 method ---------- */
.method { border-top: 1px solid var(--line); }

.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1.5rem, 4vw, 3.5rem);
}
.step {
  border-top: 1px solid var(--line-strong);
  padding-top: 1.4rem;
}
.step-no {
  display: block;
  font-family: var(--serif);
  font-size: 3.2rem;
  font-weight: 400;
  line-height: 1;
  color: var(--green);
  margin-bottom: 0.9rem;
}
.step h3 { font-size: 1.25rem; margin-bottom: 0.55rem; }
.step p { font-size: 0.9375rem; line-height: 1.6; }

.integrations {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: clamp(2.5rem, 5vw, 4rem);
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}
.chip {
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  padding: 0.45rem 0.9rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink);
  background: var(--card);
}
.integrations-note {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ---------- 04 security ---------- */
.security { border-top: 1px solid var(--line); }

.controls {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 clamp(2rem, 5vw, 4.5rem);
  border-top: 1px solid var(--line-strong);
}
.control {
  display: grid;
  grid-template-columns: 11rem minmax(0, 1fr);
  gap: 1.5rem;
  padding-block: 1.15rem;
  border-bottom: 1px solid var(--line);
}
.control dt {
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink);
  padding-top: 0.2rem;
}
.control dd { font-size: 0.9375rem; }

.controls-note {
  margin-top: 1.5rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* ---------- 05 CTA band ---------- */
.cta-band {
  background: var(--navy-band);
  color: var(--cream);
  padding-block: clamp(4.5rem, 9vw, 7.5rem);
}
.cta-inner { max-width: 46rem; }
.cta-band h2 {
  color: var(--cream);
  font-size: clamp(2.1rem, 4vw, 3.1rem);
  margin-block: 1.5rem 1.1rem;
}
.cta-sub { color: var(--cream-muted); margin-bottom: 2.25rem; max-width: 36em; }
.cta-micro {
  margin-top: 2.75rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(243, 239, 228, 0.18);
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cream-muted);
}

/* ---------- footer ---------- */
.site-foot { border-top: 1px solid var(--line-strong); padding-top: clamp(2.5rem, 5vw, 4rem); }

.foot-grid {
  display: grid;
  grid-template-columns: minmax(0, 2fr) repeat(3, minmax(0, 1fr));
  gap: 2.5rem;
  padding-bottom: 2.5rem;
}
.foot-brand img { width: 132px; height: auto; }

.foot-col h4 {
  font-family: var(--mono);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.9rem;
}
.foot-col a {
  display: block;
  font-size: 0.9375rem;
  color: var(--body);
  text-decoration: none;
  padding-block: 0.22rem;
}
.foot-col a:hover { color: var(--green); }

.foot-bar {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  border-top: 1px solid var(--line);
  padding-block: 1.4rem 1.6rem;
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ---------- legal / document pages ---------- */
.doc-page { max-width: 44rem; padding-block: clamp(3rem, 6vw, 5rem); }
.doc-page h1 { font-size: clamp(2rem, 4vw, 2.8rem); margin-block: 0.75rem 2rem; }
.doc-page h2 { font-size: 1.35rem; margin-block: 2.25rem 0.6rem; }
.doc-page p + p { margin-top: 0.8rem; }
.doc-page .todo {
  font-family: var(--mono);
  font-size: 0.8125rem;
  color: var(--amber);
}

/* ---------- reveal on scroll (JS adds .reveal; no-JS stays visible) ---------- */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 500ms ease, transform 500ms ease;
  }
  .reveal.in { opacity: 1; transform: none; }
}

/* ---------- responsive ---------- */
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { max-width: 34rem; }
  .annotation { bottom: -3.6rem; right: 1.5rem; }
  .hero { padding-bottom: clamp(6rem, 12vw, 8rem); }
  .controls { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .site-nav {
    display: none;
    position: absolute;
    inset: 100% 0 auto 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line-strong);
    padding: 0.5rem var(--gutter) 1.25rem;
  }
  .site-nav.open { display: flex; }
  .site-nav > a:not(.btn) { padding-block: 0.7rem; font-size: 0.9375rem; }
  .site-nav .btn { margin-top: 0.9rem; }

  .steps { grid-template-columns: 1fr; }
  .module { grid-template-columns: 1fr; gap: 0.4rem; padding-block: 1.7rem; }
  .module-no { padding-top: 0; }
  .module h3 { display: block; }
  .module-tag { display: block; margin-left: 0; margin-top: 0.15rem; }
  .control { grid-template-columns: 1fr; gap: 0.35rem; }
  .integrations-note { margin-left: 0; flex-basis: 100%; }
  .foot-grid { grid-template-columns: 1fr; gap: 1.75rem; }
  .foot-bar { flex-direction: column; gap: 0.4rem; }
  .ledger { font-size: 0.75rem; }
  .specimen { padding-inline: 0.9rem; }
}

@media (max-width: 480px) {
  .annotation { font-size: 0.9375rem; }
}