/* ============================================================================
   Redlineo — site stylesheet
   Derived from the product family's existing palette and type system
   (docs/aais-benefits.html) and extended for a multi-page site.
   The redline IS the aesthetic: paper/ink, ruled hairlines, monospace hashes,
   struck deletions and underlined insertions in the product's own colors.
   ========================================================================== */

:root {
  --paper: #F6F8FB;
  --paper-raised: #FFFFFF;
  --ink: #131A24;
  --ink-soft: #55606F;
  --hairline: #D6DEE8;
  --hairline-strong: #BDC8D6;
  --accent: #1E4E8F;
  --ins: #1E4E8F;
  --del: #A5342C;
  --ok: #2E6A4C;
  --amber: #9A6A16;
  --amber-wash: rgba(154,106,22,0.12);
  --ok-wash: rgba(46,106,76,0.09);
  --del-wash: rgba(165,52,44,0.08);
  --accent-wash: rgba(30,78,143,0.06);

  --serif: Georgia, 'Times New Roman', 'Iowan Old Style', serif;
  --sans: system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, 'SF Mono', 'JetBrains Mono', Menlo, Consolas, monospace;

  --measure: 78rem;
  --measure-wide: 88rem;
  --step--1: 0.82rem;
  --step-0: 1.02rem;
  --step-1: 1.24rem;
  --step-2: 1.62rem;
  --step-3: clamp(2.1rem, 1.4rem + 3vw, 3.3rem);
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0F141B;
    --paper-raised: #161D27;
    --ink: #E7ECF3;
    --ink-soft: #93A0B2;
    --hairline: #26303D;
    --hairline-strong: #34414F;
    --accent: #6EA0E6;
    --ins: #6EA0E6;
    --del: #E1928A;
    --ok: #74BE97;
    --amber: #D6A94E;
    --amber-wash: rgba(214,169,78,0.14);
    --ok-wash: rgba(116,190,151,0.11);
    --del-wash: rgba(225,146,138,0.10);
    --accent-wash: rgba(110,160,230,0.09);
  }
}
:root[data-theme="light"] {
  --paper: #F6F8FB; --paper-raised: #FFFFFF; --ink: #131A24; --ink-soft: #55606F;
  --hairline: #D6DEE8; --hairline-strong: #BDC8D6; --accent: #1E4E8F; --ins: #1E4E8F;
  --del: #A5342C; --ok: #2E6A4C; --amber: #9A6A16; --amber-wash: rgba(154,106,22,0.12);
  --ok-wash: rgba(46,106,76,0.09); --del-wash: rgba(165,52,44,0.08); --accent-wash: rgba(30,78,143,0.06);
}
:root[data-theme="dark"] {
  --paper: #0F141B; --paper-raised: #161D27; --ink: #E7ECF3; --ink-soft: #93A0B2;
  --hairline: #26303D; --hairline-strong: #34414F; --accent: #6EA0E6; --ins: #6EA0E6;
  --del: #E1928A; --ok: #74BE97; --amber: #D6A94E; --amber-wash: rgba(214,169,78,0.14);
  --ok-wash: rgba(116,190,151,0.11); --del-wash: rgba(225,146,138,0.10); --accent-wash: rgba(110,160,230,0.09);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: var(--step-0);
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.page {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 3rem);
}
.page.wide { max-width: var(--measure-wide); }

/* Skip link ------------------------------------------------------------- */
.skip {
  position: absolute; left: -999px; top: 0; z-index: 100;
  background: var(--accent); color: #fff; padding: 0.6rem 1rem;
  border-radius: 0 0 6px 0; font-family: var(--mono); font-size: var(--step--1);
}
.skip:focus { left: 0; }

/* The two-tone rule that reads as a redline margin ---------------------- */
.redbar { height: 3px; display: flex; }
.redbar i { flex: 1; }
.redbar i:first-child { background: var(--ins); }
.redbar i:last-child { background: var(--del); }

/* Masthead + navigation ------------------------------------------------- */
.masthead {
  display: flex; flex-wrap: wrap; gap: 0.6rem 1.5rem;
  align-items: center; justify-content: space-between;
  padding: 1.15rem 0 1.05rem;
  border-bottom: 1px solid var(--hairline);
}
.wordmark {
  font-family: var(--mono);
  font-size: var(--step--1);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
  display: inline-block;
  padding-bottom: 0.22rem;
  border-bottom: 2px solid var(--del);
}
.wordmark:hover { text-decoration: none; border-bottom-color: var(--accent); }
/* The mark (variant I): REDLINE in ink over the red line; the O in red, struck red. */
.wordmark b { color: var(--del); font-weight: 600; text-decoration: line-through; text-decoration-color: var(--del); text-decoration-thickness: 2px; }
.nav {
  display: flex; flex-wrap: wrap; align-items: center;
  gap: 0.35rem 0.15rem;
  font-family: var(--sans); font-size: 0.9rem;
}
.nav a {
  color: var(--ink-soft); text-decoration: none;
  padding: 0.35rem 0.6rem; border-radius: 6px; white-space: nowrap;
}
.nav a:hover { color: var(--ink); background: var(--accent-wash); }
.nav a[aria-current="page"] { color: var(--accent); font-weight: 600; }

/* Eyebrow / section labels --------------------------------------------- */
.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  display: flex; align-items: center; gap: 0.7rem;
  margin: 0 0 1rem;
}
.eyebrow::after { content: ""; height: 1px; flex: 1; background: var(--hairline); }
.eyebrow.plain::after { display: none; }

/* Hero ------------------------------------------------------------------ */
.hero { padding: clamp(2.2rem, 5vw, 3.8rem) 0 2.4rem; }
h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: var(--step-3);
  line-height: 1.08;
  letter-spacing: -0.015em;
  text-wrap: balance;
  margin: 0 0 1.2rem;
  color: var(--ink);
}
h1 .ins { text-decoration-thickness: 2px; text-underline-offset: 5px; }
.lede {
  font-size: var(--step-1);
  color: var(--ink-soft);
  max-width: 46ch;
  margin: 0 0 2rem;
}
.lede.wide { max-width: 60ch; }

/* Redline inline marks -------------------------------------------------- */
.ins { color: var(--ins); text-decoration: underline; text-decoration-thickness: 1.5px; text-underline-offset: 3px; }
.del { color: var(--del); text-decoration: line-through; text-decoration-thickness: 1.5px; }

/* Hero grid ------------------------------------------------------------- */
.hero-grid {
  display: grid; gap: clamp(1.5rem, 4vw, 2.5rem);
  grid-template-columns: 1fr;
  align-items: start;
}
@media (min-width: 56rem) {
  .hero-grid { grid-template-columns: 1.15fr 0.85fr; }
}

/* Demo chip ------------------------------------------------------------- */
.demo-chip {
  display: inline-flex; flex-wrap: wrap; align-items: center; gap: 0.5rem;
  font-family: var(--mono); font-size: var(--step--1);
  background: var(--paper-raised);
  border: 1px solid var(--hairline);
  border-radius: 7px;
  padding: 0.55rem 0.85rem;
}
.demo-chip .tag { color: var(--ink-soft); letter-spacing: 0.04em; }

/* Certificate object ---------------------------------------------------- */
.cert {
  position: relative;
  background: var(--paper-raised);
  border: 1px solid var(--hairline-strong);
  border-radius: 10px;
  padding: 1.4rem 1.4rem 1.25rem;
  box-shadow: 0 1px 0 var(--hairline), 0 18px 40px -28px rgba(15,25,40,0.5);
  font-family: var(--mono);
  font-size: 0.8rem;
  line-height: 1.5;
}
.cert-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; padding-bottom: 0.85rem; margin-bottom: 0.9rem;
  border-bottom: 1px dashed var(--hairline-strong);
}
.cert-title { letter-spacing: 0.14em; text-transform: uppercase; font-size: 0.7rem; color: var(--ink-soft); }
.seal {
  display: inline-flex; align-items: center; gap: 0.4rem;
  color: var(--ok); font-weight: 600;
  background: var(--ok-wash);
  border: 1px solid color-mix(in srgb, var(--ok) 35%, transparent);
  border-radius: 999px; padding: 0.2rem 0.6rem; font-size: 0.72rem;
  letter-spacing: 0.08em;
}
.cert-row { display: grid; grid-template-columns: 5.4rem 1fr; gap: 0.5rem; }
.cert-row .k { color: var(--ink-soft); }
.cert-row .v { color: var(--ink); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cert-note { margin-top: 0.85rem; padding-top: 0.8rem; border-top: 1px dashed var(--hairline-strong); color: var(--ink-soft); font-size: 0.72rem; }

/* Sections -------------------------------------------------------------- */
section { padding: 2.4rem 0; border-top: 1px solid var(--hairline); }
section.close { border-top: 2px solid var(--ink); }
section:first-of-type { }
h2 {
  font-family: var(--serif); font-weight: 400;
  font-size: var(--step-2); letter-spacing: -0.01em;
  text-wrap: balance; margin: 0 0 1.4rem; line-height: 1.2;
}
h3 { font-family: var(--sans); font-size: 1.06rem; font-weight: 650; margin: 1.6rem 0 0.6rem; }
p { margin: 0 0 1rem; }
.prose { max-width: 60ch; }

/* Claim lists ----------------------------------------------------------- */
.claims { list-style: none; padding: 0; margin: 0; display: grid; gap: 1.05rem; }
.claims.two { grid-template-columns: 1fr; }
@media (min-width: 46rem) { .claims.two { grid-template-columns: 1fr 1fr; gap: 1.05rem 2.4rem; } }
.claim { display: grid; grid-template-columns: auto 1fr; gap: 0.7rem; align-items: start; }
.claim .mark {
  font-family: var(--mono); color: var(--ok); font-weight: 700;
  line-height: 1.5; font-size: 0.95rem; user-select: none;
}
.claim b { font-weight: 600; }
.claim .sub { color: var(--ink-soft); }

/* Pillars --------------------------------------------------------------- */
.pillar-grid { display: grid; gap: 2.2rem; grid-template-columns: 1fr; }
@media (min-width: 52rem) { .pillar-grid { grid-template-columns: 1fr 1fr; gap: 2.6rem; } }
.pillar h3 {
  font-family: var(--sans); font-size: 1.06rem; font-weight: 650;
  margin: 0 0 0.9rem; padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--accent);
  display: inline-block;
}

/* Card grid ------------------------------------------------------------- */
.card-grid { display: grid; gap: 1.1rem; grid-template-columns: 1fr; margin: 0; padding: 0; list-style: none; }
@media (min-width: 42rem) { .card-grid.c2 { grid-template-columns: 1fr 1fr; } }
@media (min-width: 52rem) { .card-grid.c3 { grid-template-columns: repeat(3, 1fr); } }
.card {
  background: var(--paper-raised);
  border: 1px solid var(--hairline);
  border-radius: 10px;
  padding: 1.25rem 1.3rem;
  display: flex; flex-direction: column; gap: 0.5rem;
}
a.card { text-decoration: none; color: inherit; transition: border-color 0.15s ease, transform 0.15s ease; }
a.card:hover { border-color: var(--hairline-strong); }
.card h3 { margin: 0; font-size: 1.02rem; }
.card .kv { font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); }
.card p { margin: 0; color: var(--ink-soft); font-size: 0.95rem; }
.card .more { font-family: var(--mono); font-size: 0.75rem; color: var(--accent); margin-top: auto; padding-top: 0.4rem; }
a.card:hover .more { text-decoration: underline; }

/* Feature blocks (numbered, ruled) -------------------------------------- */
.feature { padding: 1.5rem 0; border-top: 1px solid var(--hairline); display: grid; gap: 0.6rem 1.4rem; grid-template-columns: 1fr; }
@media (min-width: 48rem) { .feature { grid-template-columns: 14rem 1fr; } }
.feature:first-child { border-top: 0; }
.feature .flabel { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent); padding-top: 0.2rem; }
.feature h3 { margin: 0 0 0.5rem; }
.feature p { color: var(--ink-soft); }
.feature ul { margin: 0.5rem 0 0; padding-left: 1.1rem; color: var(--ink-soft); }
.feature ul li { margin: 0.3rem 0; }

/* Redline sample block -------------------------------------------------- */
.sample {
  background: var(--paper-raised);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  padding: 1.1rem 1.25rem;
  font-family: var(--serif);
  line-height: 1.7;
  margin: 1.2rem 0;
}
.sample .doc-label { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-soft); display: block; margin-bottom: 0.6rem; }
.omit {
  font-family: var(--mono); font-size: 0.75rem; color: var(--ink-soft);
  text-align: center; letter-spacing: 0.04em;
  padding: 0.5rem 0; margin: 0.6rem 0;
  border-top: 1px dashed var(--hairline-strong);
  border-bottom: 1px dashed var(--hairline-strong);
}

/* Legend swatches ------------------------------------------------------- */
.legend { display: flex; flex-wrap: wrap; gap: 0.7rem 1.4rem; margin: 1rem 0; padding: 0; list-style: none; font-family: var(--mono); font-size: var(--step--1); }
.legend li { display: inline-flex; align-items: center; gap: 0.5rem; }
.swatch { width: 0.95rem; height: 0.95rem; border-radius: 3px; border: 1px solid rgba(0,0,0,0.15); display: inline-block; }
.swatch.ins { background: color-mix(in srgb, var(--ins) 22%, var(--paper-raised)); border-color: var(--ins); }
.swatch.del { background: var(--del-wash); border-color: var(--del); }
.swatch.chg { background: var(--amber-wash); border-color: var(--amber); }
.swatch.ok { background: var(--ok-wash); border-color: var(--ok); }

/* Tables ---------------------------------------------------------------- */
.table-scroll { overflow-x: auto; border: 1px solid var(--hairline); border-radius: 10px; }
table { border-collapse: collapse; width: 100%; min-width: 34rem; font-size: 0.92rem; }
caption { text-align: left; color: var(--ink-soft); font-size: var(--step--1); margin-bottom: 0.9rem; }
thead th {
  text-align: left; font-family: var(--sans); font-weight: 600; font-size: 0.82rem;
  letter-spacing: 0.02em; color: var(--ink-soft);
  padding: 0.85rem 1rem; border-bottom: 1px solid var(--hairline-strong);
  background: var(--accent-wash);
}
thead th.us { color: var(--accent); }
tbody td, tbody th { padding: 0.72rem 1rem; border-bottom: 1px solid var(--hairline); vertical-align: top; }
tbody th { text-align: left; font-weight: 500; font-family: var(--sans); }
tbody tr:last-child td, tbody tr:last-child th { border-bottom: 0; }
td.c { text-align: center; font-family: var(--mono); font-variant-numeric: tabular-nums; }
.yes { color: var(--ok); font-weight: 700; }
.no { color: var(--ink-soft); }
.partial { color: var(--ink-soft); font-style: italic; font-size: 0.82rem; }
td.us, th.us { background: var(--accent-wash); }

/* Status pills (requirements-style) ------------------------------------ */
.pill { font-family: var(--mono); font-size: 0.72rem; padding: 0.1rem 0.5rem; border-radius: 999px; white-space: nowrap; }
.pill.ok { color: var(--ok); background: var(--ok-wash); border: 1px solid color-mix(in srgb, var(--ok) 35%, transparent); }
.pill.part { color: var(--amber); background: var(--amber-wash); border: 1px solid color-mix(in srgb, var(--amber) 35%, transparent); }
.pill.no { color: var(--ink-soft); background: transparent; border: 1px solid var(--hairline-strong); }

/* Numbered steps -------------------------------------------------------- */
.steps { display: grid; gap: 0.75rem; margin: 0 0 1.6rem; padding: 0; list-style: none; counter-reset: s; }
.steps li { display: grid; grid-template-columns: auto 1fr; gap: 0.85rem; align-items: baseline; }
.steps li::before {
  counter-increment: s; content: counter(s);
  font-family: var(--mono); font-size: 0.75rem; color: var(--accent);
  border: 1px solid var(--accent); border-radius: 50%;
  width: 1.5rem; height: 1.5rem; display: grid; place-items: center;
}
.kicker { font-family: var(--serif); font-size: var(--step-1); font-style: italic; color: var(--ink); margin: 0; }

/* Code / certificate mono blocks --------------------------------------- */
pre, .codeblock {
  background: var(--paper-raised);
  border: 1px solid var(--hairline);
  border-radius: 8px;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--ink);
  margin: 1rem 0;
}
pre code { font-family: inherit; font-size: inherit; }
code.inline, :not(pre) > code {
  font-family: var(--mono); font-size: 0.86em;
  background: var(--accent-wash); color: var(--ink);
  padding: 0.08em 0.36em; border-radius: 4px;
}
.codeblock .cm { color: var(--ink-soft); }

/* Definition rows (params / headers) ----------------------------------- */
.deflist { margin: 1rem 0; border: 1px solid var(--hairline); border-radius: 10px; overflow: hidden; }
.deflist .row { display: grid; grid-template-columns: 1fr; gap: 0.2rem; padding: 0.8rem 1rem; border-top: 1px solid var(--hairline); }
.deflist .row:first-child { border-top: 0; }
@media (min-width: 40rem) { .deflist .row { grid-template-columns: 14rem 1fr; gap: 1rem; } }
.deflist .term { font-family: var(--mono); font-size: 0.82rem; color: var(--accent); }
.deflist .desc { color: var(--ink-soft); font-size: 0.95rem; }

/* Callout / note -------------------------------------------------------- */
.note {
  background: var(--accent-wash);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  padding: 0.9rem 1.1rem;
  margin: 1.2rem 0;
  font-size: 0.95rem;
}
.note.warn { border-left-color: var(--amber); background: var(--amber-wash); }
.note.ok { border-left-color: var(--ok); background: var(--ok-wash); }
.note .lbl { font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-soft); display: block; margin-bottom: 0.25rem; }

/* Buttons / CTAs -------------------------------------------------------- */
.actions { display: flex; flex-wrap: wrap; gap: 0.7rem; margin: 1.4rem 0 0; }
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--mono); font-size: 0.82rem; letter-spacing: 0.04em;
  text-decoration: none; border-radius: 7px;
  padding: 0.62rem 1.05rem; border: 1px solid var(--accent);
}
.btn.primary { background: var(--accent); color: #fff; }
.btn.primary:hover { filter: brightness(1.06); }
.btn.ghost { color: var(--accent); background: transparent; }
.btn.ghost:hover { background: var(--accent-wash); }

/* SEO keyword row / meta chips ----------------------------------------- */
.tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin: 1rem 0 0; padding: 0; list-style: none; }
.tags li { font-family: var(--mono); font-size: 0.7rem; color: var(--ink-soft); border: 1px solid var(--hairline); border-radius: 999px; padding: 0.18rem 0.6rem; }

/* Screenshot placeholder ----------------------------------------------- */
.shot {
  border: 1px dashed var(--hairline-strong);
  border-radius: 8px;
  padding: 1.6rem 1.2rem;
  text-align: center;
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  background: repeating-linear-gradient(45deg, transparent, transparent 10px, var(--accent-wash) 10px, var(--accent-wash) 11px);
  margin: 1.2rem 0;
}

/* FAQ ------------------------------------------------------------------- */
.faq { margin: 1.4rem 0; }
.faq details {
  border-top: 1px solid var(--hairline);
  padding: 0.4rem 0;
}
.faq details:last-child { border-bottom: 1px solid var(--hairline); }
.faq summary {
  cursor: pointer; font-family: var(--serif); font-size: 1.1rem;
  padding: 0.7rem 0; list-style: none; display: flex; justify-content: space-between; gap: 1rem; align-items: baseline;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-family: var(--mono); color: var(--accent); font-size: 1.2rem; }
.faq details[open] summary::after { content: "\2212"; }
.faq .answer { color: var(--ink-soft); padding: 0 0 0.9rem; max-width: 62ch; }

/* Docs prose ------------------------------------------------------------ */
.doc-body { max-width: none; min-width: 0; }
.doc-body .lede, .doc-body .prose { max-width: none; }
.doc-body h2 { margin-top: 2.2rem; padding-top: 1.4rem; border-top: 1px solid var(--hairline); }
.doc-body h3 { margin-top: 1.6rem; }
.doc-body ul, .doc-body ol { padding-left: 1.2rem; color: var(--ink); }
.doc-body li { margin: 0.35rem 0; }
.doc-body blockquote { margin: 1rem 0; padding: 0.2rem 0 0.2rem 1rem; border-left: 3px solid var(--hairline-strong); color: var(--ink-soft); }
.doc-nav { margin: 0; padding: 0; list-style: none; display: grid; gap: 0.4rem; }
.doc-nav a { color: var(--ink-soft); text-decoration: none; font-size: 0.95rem; }
.doc-nav a:hover, .doc-nav a[aria-current="page"] { color: var(--accent); }
.doc-layout { display: grid; gap: 2rem; grid-template-columns: 1fr; padding: clamp(1.8rem, 4vw, 2.8rem) 0 2.4rem; }
@media (min-width: 54rem) { .doc-layout { grid-template-columns: 14rem minmax(0, 1fr); align-items: start; } .doc-aside { position: sticky; top: 1.8rem; } }
.doc-aside .eyebrow { margin-bottom: 0.7rem; }

/* Pager (prev/next) ----------------------------------------------------- */
.pager { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; margin-top: 2rem; padding-top: 1.4rem; border-top: 1px solid var(--hairline); font-family: var(--mono); font-size: 0.8rem; }
.pager a { color: var(--accent); text-decoration: none; }
.pager a:hover { text-decoration: underline; }

/* Footer ---------------------------------------------------------------- */
footer.site {
  border-top: 2px solid var(--ink);
  margin-top: 2rem;
  padding: 2rem 0 3rem;
  color: var(--ink-soft);
}
.foot-grid { display: grid; gap: 1.6rem; grid-template-columns: 1fr; }
@media (min-width: 46rem) { .foot-grid { grid-template-columns: 1.4fr 1fr 1fr; } }
footer.site .wordmark { display: inline-block; margin-bottom: 0.7rem; }
footer.site h4 { font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-soft); margin: 0 0 0.7rem; font-weight: 600; }
footer.site ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.35rem; }
footer.site a { color: var(--ink-soft); text-decoration: none; font-size: 0.92rem; }
footer.site a:hover { color: var(--accent); }
.foot-contact a { color: var(--accent); }
.foot-legal { margin-top: 1.8rem; padding-top: 1.2rem; border-top: 1px solid var(--hairline); font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.03em; line-height: 1.7; color: var(--ink-soft); }
.foot-legal p { margin: 0 0 0.5rem; max-width: 90ch; }

/* Interior pages: a subtly darker footer band to close the page.
   (The landing has its own colored bands and keeps a paper footer.) */
body:not(.landing) footer.site {
  background: color-mix(in srgb, var(--paper) 92%, #000);
}

/* Motion ---------------------------------------------------------------- */
.fade { opacity: 0; transform: translateY(10px); animation: rise 0.7s cubic-bezier(.2,.7,.2,1) forwards; }
.fade.d1 { animation-delay: 0.08s; }
.fade.d2 { animation-delay: 0.16s; }
@keyframes rise { to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .fade { animation: none; opacity: 1; transform: none; } }

a { color: var(--accent); }
a:hover { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
img { max-width: 100%; height: auto; }
hr { border: 0; border-top: 1px solid var(--hairline); margin: 2rem 0; }

/* ============================================================================
   Landing-only design (body.landing = index.html)
   The landing carries more energy than the interior pages, but every element is
   drawn from the product's own palette and subject matter — the redline, the
   certificate, insertion-blue and verified-green. Three designed moments:
   an animated redline "specimen" in the hero, a full-bleed dark proof band, and
   a soft accent closing band. Interior pages are untouched.
   ========================================================================== */
/* Distinct tinted hero band — the top of the page reads as its own zone */
.landing .hero-band {
  border: 0;
  border-bottom: 1px solid var(--hairline);
  background:
    radial-gradient(46% 62% at 85% 10%, color-mix(in srgb, var(--ok) 18%, transparent), transparent 60%),
    radial-gradient(52% 66% at 3% 0%, color-mix(in srgb, var(--accent) 22%, transparent), transparent 62%),
    linear-gradient(180deg,
      color-mix(in srgb, var(--accent) 12%, var(--paper)) 0%,
      color-mix(in srgb, var(--accent) 5%, var(--paper)) 55%,
      var(--paper) 100%);
}
.landing .hero { padding-top: clamp(2.4rem, 5vw, 4rem); padding-bottom: clamp(1.8rem, 4vw, 2.8rem); }
.landing h1 { font-size: clamp(2.5rem, 1.5rem + 3.6vw, 4rem); }

/* Card elevation + hover lift */
.landing .card {
  box-shadow: 0 1px 2px rgba(15,25,40,0.04), 0 16px 34px -30px rgba(15,25,40,0.55);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.15s ease;
}
.landing .card:hover {
  transform: translateY(-2px);
  border-color: var(--hairline-strong);
  box-shadow: 0 1px 2px rgba(15,25,40,0.05), 0 22px 44px -28px rgba(15,25,40,0.5);
}
.landing .btn.primary {
  background: linear-gradient(180deg, color-mix(in srgb, var(--accent) 88%, white) 0%, var(--accent) 100%);
  box-shadow: 0 10px 24px -14px color-mix(in srgb, var(--accent) 65%, transparent);
}
@media (prefers-color-scheme: dark) {
  .landing .btn.primary { background: linear-gradient(180deg, color-mix(in srgb, var(--accent) 92%, black) 0%, var(--accent) 100%); }
}

/* --- The hero redline specimen ---------------------------------------- */
.specimen {
  position: relative;
  background: var(--paper-raised);
  border: 1px solid var(--hairline-strong);
  border-radius: 12px;
  padding: 1.5rem 1.6rem 1.35rem;
  box-shadow: 0 1px 0 var(--hairline),
              0 44px 74px -42px color-mix(in srgb, var(--accent) 55%, rgba(15,25,40,0.6));
  font-family: var(--serif);
  overflow: hidden;
}
.specimen::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--ins), var(--del));
}
.spec-label {
  font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--ink-soft); display: block; margin-bottom: 1rem;
}
.spec-line { font-size: 1.06rem; line-height: 1.95; margin: 0 0 0.45rem; }
.spec-divider { height: 1px; background: var(--hairline); margin: 1.15rem 0 0.95rem; }
.spec-proof { display: flex; align-items: center; justify-content: space-between; gap: 1rem; font-family: var(--mono); font-size: 0.72rem; }
.spec-proof .hash { color: var(--ink-soft); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.specimen .del { text-decoration-thickness: 2px; }
.specimen .ins {
  text-decoration-thickness: 2px; text-underline-offset: 3px;
  background: linear-gradient(color-mix(in srgb, var(--ins) 14%, transparent) 0 100%) no-repeat;
  background-size: 100% 72%; background-position: 0 84%;
}

/* --- Full-bleed dark proof band --------------------------------------- */
.landing .proof-band {
  border: 0;
  color: #E7ECF3;
  background:
    radial-gradient(60% 130% at 88% 0%, rgba(110,160,230,0.22), transparent 55%),
    radial-gradient(55% 130% at 5% 100%, rgba(116,190,151,0.18), transparent 55%),
    #111823;
  padding: clamp(2.8rem, 5vw, 4rem) 0;
}
.landing .proof-band h2 { color: #F3F6FB; }
.landing .proof-band .eyebrow { color: #86B2EF; }
.landing .proof-band .eyebrow::after { background: rgba(255,255,255,0.16); }
.landing .proof-band .claim .mark { color: #7ECBA0; }
.landing .proof-band .claim b { color: #F3F6FB; }
.landing .proof-band .claim .sub { color: #AEBBCC; }
.landing .proof-band .ins { color: #93B9F0; }
.landing .proof-band .del { color: #E7A69E; }
.landing .proof-band a { color: #93B9F0; }
.landing .proof-band code { background: rgba(255,255,255,0.09); color: #D7E0EC; }
.landing .proof-band .band-note {
  margin-top: 1.6rem; font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.04em;
  color: #9DABBE; display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 0.9rem;
}
.landing .proof-band .band-seal {
  color: #7ECBA0; border: 1px solid rgba(126,203,160,0.4); background: rgba(126,203,160,0.12);
  border-radius: 999px; padding: 0.15rem 0.6rem; letter-spacing: 0.08em;
}

/* --- Soft accent closing band ----------------------------------------- */
.landing .cta-band {
  border: 0;
  border-top: 1px solid var(--hairline);
  background: linear-gradient(180deg, color-mix(in srgb, var(--accent) 11%, var(--paper)) 0%, var(--paper) 100%);
  padding: clamp(2.8rem, 5vw, 4rem) 0 clamp(3.2rem, 6vw, 4.4rem);
}
.landing .cta-band .kicker { margin-bottom: 1.4rem; }