/* site.css · v2 · 2026-09-01 · bestaivoicegenerator.com design system
   "Instrument, not blog." Dark-first lab shell with a calmer long-read surface;
   light theme via prefers-color-scheme (same behavior as v1). Two self-hosted
   variable fonts + system mono apparatus voice. Every v1 class keeps working.
   Evidence for the choices: /docs mirror of bavg-redesign/design/DECISIONS.md */

/* ---------- Fonts (self-hosted, variable) ---------- */
@font-face {
  font-family: 'Space Grotesk';
  src: url('/assets/fonts/SpaceGrotesk-var.woff2') format('woff2');
  font-weight: 300 700; font-display: swap;
}
@font-face {
  font-family: 'Inter';
  src: url('/assets/fonts/Inter-var.woff2') format('woff2');
  font-weight: 100 900; font-display: swap;
}

/* ---------- Tokens ---------- */
:root {
  color-scheme: dark light;
  /* surfaces */
  --bg: #0b0d11;            /* page ground — lab shell */
  --bg-raised: #12151b;     /* cards, strips */
  --bg-read: #14171d;       /* long-read surface (calmer than shell) */
  --bg-soft: #171b22;       /* hover / secondary raised */
  --line: rgba(255,255,255,.08);
  --line-strong: rgba(255,255,255,.15);
  /* text */
  --fg: #e8eaef;
  --muted: #a8b1bf;
  --faint: #7c8798;
  /* brand */
  --accent: #6cb1ff;
  --accent-contrast: #0b0d11;
  --spec-1: #4da3ff; --spec-2: #5f96fb; --spec-3: #7788f7;
  --spec-4: #8b7cf6; --spec-5: #9d71f4;
  /* evidence classes — AA on dark ground (≥6.8:1), never confusable */
  --glass: rgba(255,255,255,.035);
  --glass-line: rgba(255,255,255,.10);
  --spec-c: #22d3ee;
  --ok: #3fb950;      --ok-bg: rgba(63,185,80,.10);   --ok-line: rgba(63,185,80,.35);
  --claim: #58a6ff;   --claim-bg: rgba(88,166,255,.10); --claim-line: rgba(88,166,255,.35);
  --edit: #bc8cff;    --edit-bg: rgba(188,140,255,.10); --edit-line: rgba(188,140,255,.35);
  --pending: #9ba3ae; --pending-bg: rgba(155,163,174,.08); --pending-line: rgba(155,163,174,.35);
  --warn: #d29922;    --warn-bg: rgba(210,153,34,.10);  --warn-line: rgba(210,153,34,.38);
  --error: #f85149;
  /* type */
  --font-display: 'Space Grotesk', ui-sans-serif, system-ui, sans-serif;
  --font-body: 'Inter', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-mono: ui-monospace, 'SF Mono', 'Cascadia Code', 'JetBrains Mono', Consolas, monospace;
  /* layout */
  --measure: 43rem;         /* ~688px, inside the observed 640–728px band */
  --wide: 72rem;
  --radius: 10px; --radius-lg: 14px;
  --header-h: 3.5rem;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #faf9f6;          /* warm paper, not clinical white */
    --bg-raised: #ffffff;
    --bg-read: #ffffff;
    --bg-soft: #f1efe9;
    --line: rgba(20,22,28,.11);
    --line-strong: rgba(20,22,28,.22);
    --fg: #171a20;
    --muted: #4c5564;
    --faint: #6b7484;
    --accent: #245fad;
    --accent-contrast: #faf9f6;
    --glass: rgba(255,255,255,.55);
    --glass-line: rgba(20,22,28,.12);
    --ok: #1a7f37;      --ok-bg: rgba(26,127,55,.08);   --ok-line: rgba(26,127,55,.32);
    --claim: #0969da;   --claim-bg: rgba(9,105,218,.07);  --claim-line: rgba(9,105,218,.30);
    --edit: #8250df;    --edit-bg: rgba(130,80,223,.07);  --edit-line: rgba(130,80,223,.30);
    --pending: #57606a; --pending-bg: rgba(87,96,106,.07); --pending-line: rgba(87,96,106,.32);
    --warn: #9a6700;    --warn-bg: rgba(154,103,0,.08);   --warn-line: rgba(154,103,0,.32);
    --error: #cf222e;
  }
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font: 400 1rem/1.6 var(--font-body);
  background: var(--bg);
  color: var(--fg);
  -webkit-text-size-adjust: 100%;
}

/* ---------- living ground — every page, no flat color ----------
   Fixed full-viewport aurora field + faint blueprint grid behind all content.
   Radial-gradient falloff fakes the blur (no filter cost); the only animated
   properties are transform + filter hue, both compositor-friendly. */
body::before {
  content: ""; position: fixed; inset: -22%; z-index: -2; pointer-events: none;
  background:
    radial-gradient(ellipse 42% 34% at 14% 6%, rgba(77,163,255,.26), transparent 68%),
    radial-gradient(ellipse 40% 32% at 88% 12%, rgba(157,113,244,.22), transparent 68%),
    radial-gradient(ellipse 46% 36% at 55% 104%, rgba(34,211,238,.15), transparent 70%),
    radial-gradient(ellipse 32% 28% at 74% 58%, rgba(119,136,247,.13), transparent 70%);
  animation: ground-drift 52s ease-in-out infinite alternate, ground-hue 47s ease-in-out infinite alternate;
  will-change: transform;
}
@keyframes ground-drift {
  to { transform: translate(3.5%, -2.5%) rotate(2.2deg) scale(1.07); }
}
@keyframes ground-hue { to { filter: hue-rotate(14deg); } }
body::after {
  content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: radial-gradient(ellipse 90% 90% at 50% 0%, #000 20%, transparent 82%);
  mask-image: radial-gradient(ellipse 90% 90% at 50% 0%, #000 20%, transparent 82%);
  opacity: 0.55;
}
/* long reads: the field stays alive but steps back behind the text */
body.reading::before { opacity: 0.8; }
body.reading::after { opacity: 0.4; }
@media print { body::before, body::after { display: none; } }
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.2; text-wrap: balance; letter-spacing: -0.01em; }
h1 { font-size: clamp(1.9rem, 1.4rem + 2vw, 2.6rem); font-weight: 700; margin: 0.4em 0 0.5em; }
h2 { font-size: 1.5rem; font-weight: 700; margin: 2.2em 0 0.6em; }
h3 { font-size: 1.17rem; font-weight: 600; margin: 1.8em 0 0.5em; }
h4 { font-size: 1rem; font-weight: 600; margin: 1.5em 0 0.4em; }
[id] { scroll-margin-top: calc(var(--header-h) + 1rem); }
p, ul, ol { margin: 0 0 1.05em; }
code, kbd, .mono { font-family: var(--font-mono); font-size: 0.9em; }
strong { font-weight: 600; }
hr { border: 0; border-top: 1px solid var(--line); margin: 2.5rem 0; }
img, svg { max-width: 100%; height: auto; }

/* ---------- Focus & skip ---------- */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 2px; }
.skip-link {
  position: absolute; top: 0.5rem; left: 0.5rem; z-index: 100;
  padding: 0.5rem 0.9rem; background: var(--accent); color: var(--accent-contrast);
  border-radius: 6px; font-weight: 600; text-decoration: none; transform: translateY(-300%);
}
.skip-link:focus { transform: none; }

/* ---------- Links ---------- */
a { color: var(--accent); text-underline-offset: 2px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: var(--bg);
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  backdrop-filter: blur(14px) saturate(160%); -webkit-backdrop-filter: blur(14px) saturate(160%);
  height: var(--header-h);
  display: flex; align-items: center;
  padding: 0 1rem;
}
.site-header::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--spec-2) 30%, var(--spec-4) 70%, transparent);
  opacity: 0.35;
}
.site-header .header-inner {
  max-width: var(--wide); width: 100%; margin: 0 auto;
  display: flex; align-items: center; gap: 1.2rem;
}
.site-name {
  display: inline-flex; align-items: center; gap: 0.55rem;
  font-family: var(--font-display); font-weight: 700; font-size: 1.05rem;
  color: var(--fg); text-decoration: none; letter-spacing: -0.01em; white-space: nowrap;
}
.site-name:hover { color: var(--accent); text-decoration: none; }
.site-name .mark { width: 24px; height: 20px; flex: none; }
.site-header nav { margin-left: auto; display: flex; gap: 1.1rem; font-size: 0.9rem; overflow-x: auto; }
@media (max-width: 30rem) { .site-name span { display: none; } .site-name .mark { width: 28px; height: 24px; } }
.site-header nav a { color: var(--muted); text-decoration: none; white-space: nowrap; padding: 0.3rem 0; }
.site-header nav a:hover, .site-header nav a[aria-current="page"] { color: var(--fg); }

/* ---------- Verification chips — the signature layer ----------
   Five evidence classes. Icon + label + optional date, mono voice.
   Dashed border = nothing attempted yet (silence is a state). */
.chip {
  display: inline-flex; align-items: center; gap: 0.4em;
  font-family: var(--font-mono); font-size: 0.8125rem; line-height: 1;
  padding: 0.32em 0.6em; border-radius: 999px;
  border: 1px solid var(--pending-line); background: var(--pending-bg); color: var(--pending);
  white-space: nowrap; vertical-align: middle;
}
.chip svg { width: 0.85em; height: 0.85em; flex: none; }
.chip .d { color: var(--faint); }
.chip-ok      { color: var(--ok);      background: var(--ok-bg);      border-color: var(--ok-line); }
.chip-claim   { color: var(--claim);   background: var(--claim-bg);   border-color: var(--claim-line); }
.chip-edit    { color: var(--edit);    background: var(--edit-bg);    border-color: var(--edit-line); }
.chip-pending { border-style: dashed; }
.chip-warn    { color: var(--warn);    background: var(--warn-bg);    border-color: var(--warn-line); }

/* inline per-fact apparatus: "· checked 11 Aug 2026" at the point of reading */
.checked {
  font-family: var(--font-mono); font-size: 0.8125em; color: var(--faint);
  white-space: nowrap;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 0.5em;
  font: 600 0.95rem/1 var(--font-body);
  padding: 0.72em 1.25em; border-radius: 8px; text-decoration: none;
  border: 1px solid transparent; cursor: pointer;
  transition: background-color 140ms ease, border-color 140ms ease, color 140ms ease;
}
.btn-primary {
  background: linear-gradient(92deg, var(--spec-2), var(--spec-4)); color: #0b0d11;
  box-shadow: 0 4px 28px rgba(95,150,251,.38), inset 0 1px 0 rgba(255,255,255,.35);
}
.btn-primary:hover { filter: brightness(1.12); transform: translateY(-1px); text-decoration: none; box-shadow: 0 6px 36px rgba(95,150,251,.5), inset 0 1px 0 rgba(255,255,255,.35); }
.btn-ghost {
  border-color: var(--glass-line); color: var(--fg); background: var(--glass);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; transform: translateY(-1px); }
.btn { transition: background-color 140ms ease, border-color 140ms ease, color 140ms ease, transform 140ms ease, box-shadow 140ms ease, filter 140ms ease; }

/* ---------- Layout wrappers ---------- */
main { display: block; }
.wrap { max-width: var(--wide); margin: 0 auto; padding: 0 1rem; }
.prose { max-width: var(--measure); margin: 0 auto; padding: 0 1rem; }
:is(main#main, main#main > .article-col) > :where(h1, h2, h3, h4, p, ul, ol, blockquote, .lede, .updated-line, .verdict-capsule, .breadcrumb, .faq, .faq-item, .table-wrap, .toc, figure, hr, dl, .chips-row) {
  max-width: var(--measure); margin-left: auto; margin-right: auto;
}
/* v1 pages put content directly in <main>; keep its column + padding */
main#main { padding: 0 1rem 3rem; }
main#main.home { padding: 0 0 1rem; max-width: none; }
:is(main#main, main#main > .article-col) > .table-wrap.wide { max-width: min(var(--wide), 100%); }
.chips-row { display: flex; gap: 0.45rem; flex-wrap: wrap; margin: 1.1rem auto 0.2rem; }

/* article long-read surface */
.article-shell {
  background: var(--bg-read);
  border-top: 1px solid var(--line);
  padding-top: 0.5rem;
}
body.reading { background: var(--bg-read); }
body.reading .site-header { background: var(--bg-read); background: color-mix(in srgb, var(--bg-read) 80%, transparent); }
body.reading main#main { font-size: 1.125rem; line-height: 1.7; }
body.reading main#main :where(li) { margin-bottom: 0.35em; }

.lede { color: var(--muted); font-size: 1.15rem; line-height: 1.55; }
.tag {
  display: inline-block; font: 600 0.72rem/1 var(--font-mono);
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--accent); border: 1px solid var(--line-strong);
  padding: 0.35em 0.7em; border-radius: 999px;
}

/* ---------- Breadcrumb ---------- */
.breadcrumb { font-size: 0.85rem; color: var(--faint); margin: 1.2rem auto 0; }
.breadcrumb ol { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; }
.breadcrumb li { margin: 0; }
.breadcrumb li + li::before { content: "\203A"; color: var(--faint); padding: 0 0.5rem; }
.breadcrumb a { color: var(--muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--accent); text-decoration: underline; }

/* ---------- Updated line (dated verification statement) ---------- */
.updated-line {
  font-family: var(--font-mono); font-size: 0.8125rem; line-height: 1.55;
  color: var(--muted);
  border: 1px solid var(--line); border-left: 3px solid var(--ok-line);
  background: var(--bg-raised);
  border-radius: var(--radius); padding: 0.7rem 0.95rem; margin: 1.2rem auto;
}

/* ---------- Verdict capsule (answer-first block) ---------- */
.verdict-capsule {
  background: var(--bg-raised);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  padding: 1.15rem 1.3rem; margin: 1.6rem auto;
  position: relative;
}
.verdict-capsule::before {
  content: ""; position: absolute; inset: 0 auto 0 0; width: 3px;
  border-radius: 3px 0 0 3px;
  background: linear-gradient(180deg, var(--spec-1), var(--spec-5));
}
.verdict-capsule > :first-child { margin-top: 0; }
.verdict-capsule > :last-child { margin-bottom: 0; }
.verdict-capsule .updated-line { border: 0; background: none; padding: 0; margin: 0.6rem 0 0; }

/* ---------- Tables ---------- */
.table-wrap {
  overflow-x: auto; margin: 1.4rem auto;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--bg-raised);
  -webkit-overflow-scrolling: touch;
}
.table-wrap table { border-collapse: collapse; width: 100%; font-size: 0.92rem; }
.table-wrap caption { text-align: left; padding: 0.8rem 0.95rem 0.2rem; color: var(--muted); font-size: 0.85rem; }
.table-wrap th, .table-wrap td { padding: 0.62rem 0.95rem; text-align: left; vertical-align: top; border-top: 1px solid var(--line); }
.table-wrap thead th {
  position: sticky; top: 0; z-index: 1;
  background: var(--bg-soft); border-top: 0;
  font: 600 0.78rem/1.3 var(--font-mono); letter-spacing: 0.05em; text-transform: uppercase;
  color: var(--muted);
}
.table-wrap tbody tr:hover { background: var(--bg-soft); background: color-mix(in srgb, var(--accent) 6%, transparent); }
.table-wrap td.num, .table-wrap th.num { text-align: right; font-variant-numeric: tabular-nums; font-family: var(--font-mono); font-size: 0.86em; }
@media (min-width: 64rem) { .table-wrap.wide { max-width: var(--wide); } }
/* mobile scroll affordance: fading edge */
@media (max-width: 48rem) {
  .table-wrap { position: relative; }
  .table-wrap::after {
    content: ""; position: sticky; left: 100%; top: 0; width: 18px; margin-left: -18px; height: 100%;
    background: linear-gradient(90deg, transparent, var(--bg-raised)); display: block; pointer-events: none;
  }
}
/* metadata table (fact box) */
.metadata-table table, table.metadata-table { font-size: 0.88rem; }
.metadata-table th[scope="row"], table.metadata-table th[scope="row"] {
  font: 600 0.78rem/1.4 var(--font-mono); text-transform: uppercase; letter-spacing: 0.04em;
  color: var(--muted); width: 38%;
}

/* ---------- Verbatim quotation ---------- */
blockquote {
  margin: 1.3rem auto; padding: 0.8rem 1.1rem;
  border-left: 3px solid var(--claim-line);
  background: var(--claim-bg); border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--fg); font-size: 0.97em;
}
blockquote > :first-child { margin-top: 0; }
blockquote > :last-child { margin-bottom: 0; }

/* ---------- FAQ ---------- */
.faq details { border-top: 1px solid var(--line); padding: 0.55rem 0; }
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; font-weight: 600; padding: 0.4rem 0; list-style-position: outside; }
.faq summary:hover { color: var(--accent); }
.faq details[open] summary { margin-bottom: 0.5rem; }
.faq details > :last-child { margin-bottom: 0.4rem; }
.faq-item { border-top: 1px solid var(--line); padding: 0.9rem 0 0.2rem; }
.faq-item h3 { margin-top: 0; }

/* ---------- TOC ---------- */
.toc {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--bg-raised); padding: 0.9rem 1.1rem; margin: 1.4rem auto;
  font-size: 0.9rem; max-width: var(--measure);
}
.toc > summary, .toc-title {
  font: 600 0.78rem/1 var(--font-mono); letter-spacing: 0.07em; text-transform: uppercase;
  color: var(--muted); cursor: pointer; padding: 0.15rem 0;
}
.toc ol { list-style: none; margin: 0.6rem 0 0; padding: 0; columns: 1; }
.toc li { margin: 0.42rem 0; }
.toc a { color: var(--muted); text-decoration: none; }
.toc a:hover { color: var(--accent); }
.toc.side { display: none; }
@media (min-width: 70rem) {
  main#main.has-toc { display: grid; grid-template-columns: minmax(0, 1fr) 15rem; gap: 2.5rem; max-width: calc(var(--measure) + 17.5rem + 2rem); margin: 0 auto; }
  .has-toc > .article-col { min-width: 0; }
  .has-toc .toc.mobile { display: none; }
  .toc.side {
    display: block; position: sticky; top: calc(var(--header-h) + 1.2rem);
    align-self: start; max-height: calc(100vh - var(--header-h) - 2.5rem);
    overflow-y: auto; margin: 1.4rem 0 0; font-size: 0.84rem;
  }
  .toc.side .toc-sub { display: none; } /* h2 level only in the rail */
  .toc.side a[aria-current="true"] { color: var(--accent); border-left: 2px solid var(--accent); padding-left: 0.5rem; margin-left: -0.6rem; }
}

/* ---------- Full-review link (in-article handoff from a flagship section) ---------- */
.full-review-link {
  display: block; margin: 1.2rem auto; padding: 0.85rem 1.05rem;
  border: 1px solid var(--glass-line); border-left: 3px solid var(--accent);
  border-radius: var(--radius); background: var(--glass);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  font-size: 0.95rem;
}
.full-review-link strong {
  font: 600 0.72rem/1 var(--font-mono); letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--faint); display: block; margin-bottom: 0.35rem;
}

/* ---------- Cards ---------- */
.card {
  background: var(--bg-raised); border: 1px solid var(--line);
  border-radius: var(--radius-lg); padding: 1.1rem 1.2rem;
  transition: border-color 140ms ease, background-color 140ms ease;
}
.card:hover { border-color: var(--line-strong); background: var(--bg-soft); }
.card h3 { margin-top: 0; }
.card-grid { display: grid; gap: 0.9rem; grid-template-columns: repeat(auto-fill, minmax(15.5rem, 1fr)); margin: 1.4rem 0; padding: 0; list-style: none; }
.card-grid > li { margin: 0; }
a.tile {
  display: block; text-decoration: none; color: var(--fg); height: 100%;
  background: var(--glass); border: 1px solid var(--glass-line);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.05);
  border-radius: var(--radius); padding: 0.9rem 1.05rem;
  transition: border-color 140ms ease, transform 140ms ease, box-shadow 140ms ease;
}
a.tile:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: 0 8px 32px rgba(95,150,251,.18), inset 0 1px 0 rgba(255,255,255,.05); }
a.tile .t { font: 600 0.95rem/1.3 var(--font-body); display: block; }
a.tile .s { font-size: 0.82rem; color: var(--muted); display: block; margin-top: 0.25rem; }

/* provider ranking row */
.rank-row {
  display: grid; grid-template-columns: 2.6rem minmax(0,1fr) auto; gap: 0.9rem;
  align-items: baseline; padding: 0.95rem 1.1rem; position: relative;
  border: 1px solid var(--glass-line); border-radius: var(--radius);
  background: var(--glass); margin: 0.6rem 0;
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  transition: border-color 140ms ease, transform 140ms ease, box-shadow 140ms ease;
}
.rank-row:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: 0 8px 32px rgba(95,150,251,.16); }
.rank-row .rank { font: 700 1.45rem/1 var(--font-display); color: var(--faint); font-variant-numeric: tabular-nums; }
/* podium: the top three carry the spectral rail and gradient numeral */
li.rank-row:nth-child(-n+3)::before {
  content: ""; position: absolute; inset: 0 auto 0 0; width: 3px;
  border-radius: 3px 0 0 3px;
  background: linear-gradient(180deg, var(--spec-1), var(--spec-5));
}
li.rank-row:nth-child(-n+3) .rank {
  background: linear-gradient(180deg, var(--spec-1), var(--spec-5));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.rank-row .name { font: 600 1.05rem/1.3 var(--font-display); }
.rank-row .for { color: var(--muted); font-size: 0.9rem; display: block; margin-top: 0.2rem; }
.rank-row .chips { display: flex; gap: 0.4rem; flex-wrap: wrap; justify-self: end; }
@media (max-width: 40rem) { .rank-row { grid-template-columns: 2rem minmax(0,1fr); } .rank-row .chips { grid-column: 2; justify-self: start; margin-top: 0.4rem; } }

/* ---------- Hero + strips (homepage) ---------- */
.hero { position: relative; padding: 5.5rem 1rem 4.2rem; overflow: hidden; isolation: isolate; }
/* aurora field — three drifting light masses */
.aurora { position: absolute; inset: 0; pointer-events: none; z-index: -2; }
.aurora b {
  position: absolute; display: block; border-radius: 50%;
  filter: blur(72px); will-change: transform;
}
.aurora .a1 { width: 560px; height: 420px; left: -6%; top: -22%; background: rgba(77,163,255,.30); animation: drift1 21s ease-in-out infinite alternate; }
.aurora .a2 { width: 520px; height: 400px; right: -4%; top: -14%; background: rgba(157,113,244,.26); animation: drift2 26s ease-in-out infinite alternate; }
.aurora .a3 { width: 380px; height: 300px; left: 38%; bottom: -45%; background: rgba(34,211,238,.14); animation: drift3 31s ease-in-out infinite alternate; }
@keyframes drift1 { to { transform: translate(9%, 14%) scale(1.18); } }
@keyframes drift2 { to { transform: translate(-11%, 10%) scale(1.12); } }
@keyframes drift3 { to { transform: translate(6%, -18%) scale(1.22); } }
/* (hero grid now comes from the site-wide living ground on body::after) */
.hero-inner { position: relative; max-width: var(--wide); margin: 0 auto; z-index: 1; }
.hero-grid { display: grid; gap: 3rem; align-items: center; }
@media (min-width: 64rem) { .hero-grid { grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr); } }
.hero h1 {
  font-size: clamp(2.7rem, 1.7rem + 4.8vw, 5rem);
  letter-spacing: -0.04em; line-height: 1.02;
  max-width: 14ch; margin: 0.7rem 0 1rem;
}
.hero .lede { max-width: 52ch; font-size: 1.22rem; }
.hero .cta { display: flex; gap: 0.9rem; flex-wrap: wrap; margin-top: 2rem; }
/* gradient keyword gets a slow shimmer sweep */
.grad { background-size: 220% 100%; animation: shimmer 7s linear infinite; }
@keyframes shimmer { to { background-position: 220% 0; } }

/* ---------- the voice console — ambient hero demo (decorative loop) ---------- */
.console {
  position: relative; border-radius: 16px; padding: 1.05rem 1.15rem 1.25rem;
  background: var(--bg-raised);
  background: color-mix(in srgb, var(--bg) 62%, transparent);
  border: 1px solid var(--glass-line);
  backdrop-filter: blur(18px) saturate(150%); -webkit-backdrop-filter: blur(18px) saturate(150%);
  box-shadow: 0 24px 90px rgba(95,150,251,.22), inset 0 1px 0 rgba(255,255,255,.08);
}
.console-bar { display: flex; align-items: center; gap: 0.45rem; margin-bottom: 0.9rem; }
.console-bar i { width: 10px; height: 10px; border-radius: 50%; background: var(--line-strong); }
.console-bar .t { margin-left: auto; font: 500 0.72rem/1 var(--font-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--faint); }
.console-prompt {
  min-height: 4.9em; font: 400 0.97rem/1.6 var(--font-mono); color: var(--fg);
  border: 1px solid var(--line); border-radius: 10px; padding: 0.7rem 0.85rem;
  background: var(--bg);
  background: color-mix(in srgb, var(--bg) 55%, transparent);
}
.console-prompt .hint { color: var(--faint); }
.caret {
  display: inline-block; width: 8px; height: 1.1em; vertical-align: -0.18em;
  background: var(--accent); border-radius: 1px; margin-left: 2px;
  animation: blink 1.05s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.console-row { display: flex; gap: 0.9rem; align-items: center; margin-top: 0.95rem; flex-wrap: wrap; }
button.console-gen {
  font: 600 0.92rem/1 var(--font-body); padding: 0.68em 1.25em; border-radius: 8px;
  border: 1px solid transparent; cursor: pointer; color: #0b0d11;
  background: linear-gradient(92deg, var(--spec-2), var(--spec-4));
  box-shadow: 0 4px 26px rgba(95,150,251,.4), inset 0 1px 0 rgba(255,255,255,.35);
  transition: transform 120ms ease, filter 120ms ease, box-shadow 120ms ease;
  display: inline-flex; align-items: center; gap: 0.5em;
}
button.console-gen:hover { filter: brightness(1.12); transform: translateY(-1px); }
button.console-gen.busy { transform: scale(0.97); filter: saturate(1.3); }
.console-status { font: 400 0.8rem/1 var(--font-mono); color: var(--faint); }
.console-status.live { color: var(--accent); }
.console-progress { height: 4px; border-radius: 2px; background: var(--line); overflow: hidden; margin-top: 1rem; }
.console-progress b { display: block; height: 100%; width: 0; border-radius: 2px; background: linear-gradient(90deg, var(--spec-1), var(--spec-5)); }
.console-wave { display: flex; gap: 4px; align-items: center; height: 64px; margin-top: 1.05rem; }
.console-wave i {
  flex: 1; border-radius: 3px; height: 8%;
  background: linear-gradient(180deg, var(--spec-1), var(--spec-5));
  filter: drop-shadow(0 0 8px rgba(119,136,247,.45));
  transition: height 380ms cubic-bezier(.2,.8,.3,1.25);
}

/* ---------- scroll reveals (homepage; static under reduced motion / no JS) ---------- */
.rv { opacity: 0; transform: translateY(20px); transition: opacity 650ms ease, transform 650ms ease; }
.rv.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .rv { opacity: 1; transform: none; } }
html.no-js .rv { opacity: 1; transform: none; }

/* ---------- count-up stat row ---------- */
.stat-row {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(8.5rem, 1fr)); gap: 1rem;
  margin: 3rem 0 0; padding-top: 1.6rem; border-top: 1px solid var(--line);
}
.stat b {
  display: block; font: 700 2.3rem/1.1 var(--font-display); font-variant-numeric: tabular-nums;
  background: linear-gradient(120deg, var(--spec-1), var(--spec-5));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.stat span { font: 500 0.72rem/1.4 var(--font-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--faint); }
/* spectral gradient word in display type */
.grad {
  background: linear-gradient(92deg, var(--spec-1), var(--spec-5));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
/* oscilloscope divider between homepage sections */
.signal-rule { display: block; width: min(var(--wide), 100%); height: 24px; margin: 0 auto; color: var(--spec-3); opacity: 0.55; }
::selection { background: rgba(119,136,247,0.35); }

.strip {
  border-block: 1px solid var(--line);
  background: var(--glass);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  padding: 0.9rem 1rem;
}
.strip .chip-ok { box-shadow: 0 0 20px rgba(63,185,80,.22); }
.strip .chip-edit { box-shadow: 0 0 20px rgba(188,140,255,.20); }
.strip .chip-warn { box-shadow: 0 0 20px rgba(210,153,34,.20); }
.strip-inner {
  max-width: var(--wide); margin: 0 auto;
  display: flex; gap: 1.4rem; flex-wrap: wrap; align-items: center;
  font-family: var(--font-mono); font-size: 0.8125rem; color: var(--muted);
}
.strip-inner .sep { color: var(--line-strong); }

.section { padding: 2.6rem 1rem; }
.section > .wrap > h2:first-child { margin-top: 0; }
.section.alt { background: var(--bg-raised); background: color-mix(in srgb, var(--bg-raised) 70%, transparent); border-block: 1px solid var(--line); }
.kicker { font: 600 0.75rem/1 var(--font-mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); margin: 0 0 0.6rem; }
.kicker + h2 { margin-top: 0; font-size: clamp(1.6rem, 1.2rem + 1.4vw, 2.2rem); letter-spacing: -0.02em; }
.kicker + h2::after {
  content: ""; display: block; width: 58px; height: 3px; border-radius: 2px;
  margin-top: 0.55rem;
  background: linear-gradient(90deg, var(--spec-1), var(--spec-5));
}

/* paper-trail diagram */
.trail { display: flex; gap: 0.4rem; flex-wrap: wrap; align-items: stretch; list-style: none; padding: 0; margin: 1.2rem 0; counter-reset: step; }
.trail li {
  flex: 1 1 9.5rem; position: relative; margin: 0;
  background: var(--glass); border: 1px solid var(--glass-line); border-radius: var(--radius);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  padding: 0.8rem 0.9rem 0.7rem; font-size: 0.85rem; color: var(--muted);
}
.trail li strong { display: block; color: var(--fg); font-size: 0.9rem; margin-bottom: 0.25rem; }
.trail li::before {
  counter-increment: step; content: counter(step);
  font: 700 0.7rem/1.6 var(--font-mono); color: var(--accent);
  display: inline-block; margin-bottom: 0.35rem;
  border: 1px solid var(--line-strong); border-radius: 999px; width: 1.6em; text-align: center;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 0; background: var(--bg-raised);
  background: color-mix(in srgb, var(--bg-raised) 72%, transparent);
  background-image: linear-gradient(90deg, transparent, var(--spec-2) 30%, var(--spec-4) 70%, transparent);
  background-repeat: no-repeat; background-size: 100% 1px; background-position: top;
  margin-top: 3rem; padding: 2.2rem 1rem 2.6rem;
  font-size: 0.9rem; color: var(--muted);
}
.site-footer .footer-inner { max-width: var(--wide); margin: 0 auto; display: grid; gap: 1.8rem; grid-template-columns: minmax(14rem, 1.3fr) repeat(auto-fit, minmax(9rem, 1fr)); }
.site-footer h2 { font: 600 0.75rem/1 var(--font-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--faint); margin: 0 0 0.7rem; }
.site-footer nav ul, .site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin: 0.35rem 0; }
.site-footer a { color: var(--muted); text-decoration: none; }
.site-footer a:hover { color: var(--accent); text-decoration: underline; }
.site-footer .brandline { display: flex; align-items: center; gap: 0.55rem; color: var(--fg); font-family: var(--font-display); font-weight: 700; margin-bottom: 0.6rem; }
.site-footer .brandline .mark { width: 22px; height: 18px; }
.site-footer .legal { max-width: var(--wide); margin: 1.8rem auto 0; padding-top: 1.2rem; border-top: 1px solid var(--line); font-size: 0.8rem; color: var(--faint); }

/* ---------- ambient transmissions (background events, behind content) ---------- */
.ambient { position: fixed; inset: 0; z-index: -1; pointer-events: none; overflow: hidden; }
.amb-ev { position: absolute; opacity: 0.85; transition: opacity 0.9s ease; }
.amb-ev.out { opacity: 0; }
.amb-text {
  display: block; font: 400 0.8rem/1.4 var(--font-mono);
  color: var(--faint); opacity: 0.5; white-space: nowrap;
}
.amb-text.fade { opacity: 0.16; transition: opacity 0.8s ease; }
.amb-wave { display: flex; gap: 3px; height: 26px; align-items: flex-end; margin-top: 6px; }
.amb-wave i {
  width: 4px; border-radius: 2px;
  background: linear-gradient(180deg, var(--spec-1), var(--spec-5));
  opacity: 0; transform-origin: bottom;
  animation: amb-pop 0.5s ease forwards;
}
@keyframes amb-pop { from { opacity: 0; transform: scaleY(0.2); } to { opacity: 0.5; transform: none; } }
.amb-scan {
  position: absolute; left: 0; right: 0; top: -2px; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(119,136,247,.45) 35%, rgba(157,113,244,.45) 65%, transparent);
  box-shadow: 0 0 18px rgba(119,136,247,.3);
  animation: amb-scan 8.8s linear forwards;
}
@keyframes amb-scan { to { transform: translateY(102vh); } }
/* sonar rings — sound propagating from a point */
.amb-rings { position: absolute; width: 120px; height: 120px; margin: -60px 0 0 -60px; }
.amb-rings i {
  position: absolute; inset: 0; border-radius: 50%;
  border: 1px solid var(--spec-3); opacity: 0;
  animation: amb-ring 2.6s ease-out forwards;
}
@keyframes amb-ring {
  0% { transform: scale(0.12); opacity: 0.55; }
  100% { transform: scale(1); opacity: 0; }
}
/* VU meter flicker */
.amb-vu { position: absolute; display: flex; gap: 3px; height: 30px; align-items: flex-end; opacity: 0.75; transition: opacity 0.85s ease; }
.amb-vu.out { opacity: 0; }
.amb-vu i {
  width: 4px; height: 100%; border-radius: 2px; transform-origin: bottom;
  background: linear-gradient(180deg, var(--spec-1), var(--spec-5));
  opacity: 0.5; animation: amb-vu ease-in-out infinite alternate;
}
@keyframes amb-vu { from { transform: scaleY(0.15); } to { transform: scaleY(1); } }
/* oscilloscope trace drawing itself across the page */
.amb-trace {
  position: absolute; left: 0; width: 100%; height: 24px;
  opacity: 0.35; transition: opacity 0.9s ease;
}
.amb-trace.out { opacity: 0; }
.amb-trace polyline { fill: none; stroke: var(--spec-3); stroke-width: 1.2; opacity: 0.5; }
/* grid sensor cell blink — aligned to the 44px blueprint grid */
.amb-cell {
  position: absolute; width: 44px; height: 44px;
  border: 1px solid var(--spec-2); border-radius: 2px;
  box-shadow: 0 0 16px rgba(95,150,251,.28), inset 0 0 10px rgba(95,150,251,.14);
  opacity: 0; animation: amb-cell 2.5s ease-in-out forwards;
}
@keyframes amb-cell { 0%, 100% { opacity: 0; } 35% { opacity: 0.5; } 65% { opacity: 0.4; } }
/* rising signal motes */
.amb-mote {
  position: absolute; width: 3px; height: 3px; border-radius: 50%;
  background: var(--spec-2); box-shadow: 0 0 8px rgba(95,150,251,.55);
  opacity: 0; animation-name: amb-mote; animation-timing-function: linear; animation-fill-mode: forwards;
}
@keyframes amb-mote {
  0% { opacity: 0; transform: none; }
  12% { opacity: 0.5; }
  100% { opacity: 0; transform: translateY(-52vh); }
}

/* ---------- scroll-driven progress line (pure CSS, no JS) ---------- */
@supports (animation-timeline: scroll()) {
  .scroll-progress {
    position: fixed; top: 0; left: 0; right: 0; height: 2px; z-index: 90;
    background: linear-gradient(90deg, var(--spec-1), var(--spec-3), var(--spec-5));
    transform-origin: 0 50%; transform: scaleX(0);
    animation: scrollfill linear both;
    animation-timeline: scroll(root);
    pointer-events: none;
  }
  @keyframes scrollfill { to { transform: scaleX(1); } }
}

/* ---------- Scrollbar (webkit) ---------- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--line-strong); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--faint); }

/* ---------- Light-theme atmosphere adjustments ---------- */
@media (prefers-color-scheme: light) {
  body::before {
    background:
      radial-gradient(ellipse 42% 34% at 14% 6%, rgba(96,165,250,.32), transparent 68%),
      radial-gradient(ellipse 40% 32% at 88% 12%, rgba(167,139,250,.27), transparent 68%),
      radial-gradient(ellipse 46% 36% at 55% 104%, rgba(45,212,191,.19), transparent 70%),
      radial-gradient(ellipse 32% 28% at 74% 58%, rgba(129,140,248,.15), transparent 70%);
  }
  body::after { opacity: 0.5; }
  .aurora .a1 { background: rgba(77,163,255,.20); }
  .aurora .a2 { background: rgba(157,113,244,.16); }
  .aurora .a3 { background: rgba(34,211,238,.10); }
  .btn-primary { box-shadow: 0 4px 22px rgba(95,150,251,.30), inset 0 1px 0 rgba(255,255,255,.4); }
  .strip .chip-ok, .strip .chip-edit, .strip .chip-warn { box-shadow: none; }
}

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

/* ---------- Print ---------- */
@media print {
  .site-header, .site-footer, .toc, .skip-link { display: none; }
  body { background: #fff; color: #000; }
}

/* Provider evidence hubs sit beside their review in the footer: without this
   they are reachable only from the ranking and the review itself. */
.site-footer .hub-link {
  font-size: 0.78em;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  opacity: 0.62;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 1px;
  margin-left: 0.35em;
}
.site-footer .hub-link:hover,
.site-footer .hub-link:focus-visible { opacity: 1; }