/* ==========================================================================
   INFORMPULSE V4 — public-site design system
   Dark "research programme" visual system, per design handoff
   design_handoff_informpulse_site (July 2026). Applies only to pages that
   opt in with <body class="v4"> via partials/head_v4.php — the V2/V3
   stylesheets continue to serve all other pages.
   Fonts are self-hosted: /assets/fonts/fonts.css (Spectral, IBM Plex Sans,
   IBM Plex Mono). No third-party requests.
   ========================================================================== */

body.v4 {
  --accent: #5fd3e6;
  --bg: #0a1530;
  --bg-footer: #081127;
  --row: #0d1a3a;
  --row2: #0e1c3d;
  --amber: #d8a24a;
  --amber-bright: #e9b86a;
  --green: #7fd1a8;
  --ink-h1: #f5f7ff;
  --ink-h2: #eef1fb;
  --ink-h3: #f2f5ff;
  --ink-strong: #e7ebfb;
  --ink-lede: #b3bcd8;
  --ink-body: #9aa4c2;
  --ink-disc: #a7b0cd;
  --ink-mut1: #8b95b5;
  --ink-mut2: #7a85a6;
  --ink-mut3: #6b7596;
  --ink-mut4: #5e6a8e;
  --hairline: rgba(255,255,255,.09);
  --hairline-banner: rgba(255,255,255,.08);
  --hairline-row: rgba(255,255,255,.06);
  --card-grad: linear-gradient(162deg, rgba(255,255,255,.04), rgba(255,255,255,.01));
  --sans: 'IBM Plex Sans', system-ui, -apple-system, sans-serif;
  --serif: 'Spectral', Georgia, serif;
  --mono: 'IBM Plex Mono', monospace;

  margin: 0;
  background: var(--bg);
  color: #eaeefb;
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body.v4 ::selection { background: rgba(95,211,230,.25); }
body.v4 a:focus-visible,
body.v4 button:focus-visible,
body.v4 input:focus-visible,
body.v4 select:focus-visible,
body.v4 textarea:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Skip link */
.v4-skip { position: absolute; left: -9999px; top: 0; padding: .75rem 1rem; background: var(--accent); color: #06121f; font-weight: 700; z-index: 1000; }
.v4-skip:focus { left: 0; }

/* --------------------------------------------------------------------------
   Backdrop layers (fixed, non-interactive, behind content)
   -------------------------------------------------------------------------- */
.v4-bg-grid {
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size: 66px 66px;
  -webkit-mask: radial-gradient(120% 80% at 50% 0%, #000 0%, transparent 70%);
  mask: radial-gradient(120% 80% at 50% 0%, #000 0%, transparent 70%);
}
.v4-bg-glow {
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background: radial-gradient(720px 420px at 50% -8%, color-mix(in srgb, var(--accent) 13%, transparent), transparent 70%);
}
.v4-page { position: relative; z-index: 1; }

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */
.v4-main { max-width: 1180px; margin: 0 auto; padding: 0 32px; }
.v4-hero { padding: 72px 0 50px; }
.v4-hero--rule { border-bottom: 1px solid rgba(255,255,255,.07); padding-bottom: 58px; }
.v4-sec { padding: 0 0 58px; }
.v4-sec--last { padding: 0 0 72px; }

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.v4-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10,21,48,.82);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--hairline-banner);
  font-family: var(--sans);
}
.v4-header__inner {
  max-width: 1180px; margin: 0 auto; padding: 13px 32px;
  display: flex; align-items: center; gap: 18px 24px; flex-wrap: wrap;
}
.v4-brand { display: flex; align-items: center; gap: 12px; text-decoration: none; flex-shrink: 0; }
.v4-brand__mark {
  width: 30px; height: 30px; border-radius: 8px;
  border: 1px solid color-mix(in srgb, var(--accent) 50%, transparent);
  display: grid; place-items: center;
}
.v4-brand__dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 11px var(--accent); }
.v4-brand__word { font-family: var(--mono); font-size: 12px; letter-spacing: .18em; text-transform: uppercase; color: #cdd4ea; }
.v4-brand__word span { color: var(--ink-mut3); }
.v4-nav { display: flex; flex-wrap: wrap; gap: 4px; flex: 1; justify-content: flex-end; }
.v4-nav a {
  font-family: var(--mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase;
  padding: 7px 10px; border-radius: 7px; text-decoration: none; color: var(--ink-mut1);
  transition: color .18s ease, background .18s ease;
}
.v4-nav a:hover { color: #f2f5ff; background: rgba(255,255,255,.05); }
.v4-nav a.active { color: #f2f5ff; background: color-mix(in srgb, var(--accent) 16%, transparent); }
.v4-header__cta {
  flex-shrink: 0; font-family: var(--mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase;
  padding: 8px 14px; border-radius: 8px; text-decoration: none; color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent);
  transition: background .18s ease;
}
.v4-header__cta:hover { background: color-mix(in srgb, var(--accent) 12%, transparent); }

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.v4-footer { background: var(--bg-footer); border-top: 1px solid var(--hairline-banner); color: var(--ink-body); }
.v4-footer__inner { max-width: 1180px; margin: 0 auto; padding: 54px 32px 44px; }
.v4-footer__top { display: flex; flex-wrap: wrap; gap: 40px 56px; justify-content: space-between; }
.v4-footer__id { max-width: 340px; }
.v4-footer__acronyms { font-family: var(--mono); font-size: 11px; line-height: 1.85; letter-spacing: .03em; color: var(--ink-mut2); }
.v4-footer__acronyms strong { color: #aeb8d8; font-weight: 400; }
.v4-footer__stage {
  margin-top: 18px; display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-mut1);
}
.v4-footer__cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 36px 48px; flex: 1; min-width: 280px; }
.v4-footer__colhead { font-family: var(--mono); font-size: 10px; letter-spacing: .2em; text-transform: uppercase; color: var(--ink-mut4); margin-bottom: 14px; }
.v4-footer__links { display: flex; flex-direction: column; gap: 9px; }
.v4-footer__links a { font-size: 13px; color: var(--ink-body); text-decoration: none; transition: color .18s ease; }
.v4-footer__links a:hover { color: #fff; }
.v4-footer__bottom {
  margin-top: 46px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.07);
  display: flex; flex-wrap: wrap; gap: 12px 32px; justify-content: space-between;
  font-family: var(--mono); font-size: 10.5px; line-height: 1.7; letter-spacing: .04em; color: var(--ink-mut4);
}

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */
.v4-kicker { display: flex; align-items: center; gap: 13px; margin-bottom: 24px; flex-wrap: wrap; }
.v4-kicker span { font-family: var(--mono); font-size: 11px; letter-spacing: .2em; text-transform: uppercase; }
.v4-kicker .k-accent { color: var(--accent); }
.v4-kicker .k-sep { color: #3c466a; letter-spacing: 0; }
.v4-kicker .k-muted { color: var(--ink-mut2); letter-spacing: .18em; }
.v4-kicker .k-green { color: var(--green); letter-spacing: .18em; }

.v4-h1 {
  font-family: var(--serif); font-weight: 400;
  font-size: clamp(34px, 4.6vw, 58px);
  line-height: 1.06; letter-spacing: -.015em; margin: 0; color: var(--ink-h1);
}
.v4-h1--54 { font-size: clamp(32px, 4.4vw, 54px); line-height: 1.08; }
.v4-h1--56 { font-size: clamp(32px, 4.4vw, 56px); line-height: 1.08; }
.v4-h1--60 { font-size: clamp(34px, 4.8vw, 60px); line-height: 1.05; }
.v4-h1 em { font-style: italic; font-weight: 300; color: #aeb8d8; }

.v4-lede { max-width: 740px; font-size: clamp(15px, 1.4vw, 18px); line-height: 1.62; color: var(--ink-lede); margin: 28px 0 0; text-wrap: pretty; }
.v4-lede strong { color: var(--ink-strong); font-weight: 600; }
.v4-lede a, .v4-link { color: var(--accent); text-decoration: none; border-bottom: 1px solid color-mix(in srgb, var(--accent) 35%, transparent); }

.v4-h2 { font-family: var(--serif); font-weight: 500; font-size: 27px; margin: 0; color: var(--ink-h2); line-height: 1.15; }
.v4-h2row { display: flex; align-items: baseline; justify-content: space-between; gap: 20px; margin-bottom: 28px; flex-wrap: wrap; }
.v4-h2side { font-family: var(--mono); font-size: 11px; letter-spacing: .16em; text-transform: uppercase; color: var(--ink-mut3); }
.v4-sublede { margin: 12px 0 0; max-width: 780px; font-size: 14.5px; line-height: 1.6; color: var(--ink-body); text-wrap: pretty; }
.v4-sublede strong { color: #e0e5f6; font-weight: 600; }

.v4-h3 { font-family: var(--serif); font-weight: 500; margin: 0; color: var(--ink-h3); }

/* --------------------------------------------------------------------------
   Chips, dots, pills, tags
   -------------------------------------------------------------------------- */
.v4-dot { width: 7px; height: 7px; border-radius: 50%; display: inline-block; flex-shrink: 0; }
.v4-dot--amber { background: var(--amber); box-shadow: 0 0 8px var(--amber); }
.v4-dot--green { background: var(--green); box-shadow: 0 0 8px var(--green); }
.v4-dot--accent { background: var(--accent); box-shadow: 0 0 8px var(--accent); }
.v4-dot--grey { background: #9aa6c2; box-shadow: none; }

.v4-chips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; }
.v4-chip {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: #c2cae3;
  border: 1px solid rgba(255,255,255,.12); border-radius: 30px; padding: 7px 14px;
}

.v4-tag {
  --c: var(--ink-mut1);
  display: inline-block; font-family: var(--mono); font-size: 10px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--c); border: 1px solid color-mix(in srgb, var(--c) 40%, transparent);
  border-radius: 20px; padding: 4px 11px; line-height: 1.5; white-space: nowrap;
}
.v4-tag--accent { --c: var(--accent); }
.v4-tag--green { --c: var(--green); }
.v4-tag--amber { --c: #c9a86a; }
.v4-tag--grey { --c: var(--ink-mut1); }
.v4-tag--wrap { white-space: normal; }

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.v4-btnrow { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.v4-btn {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--mono); font-size: 12px; letter-spacing: .06em;
  text-decoration: none; color: #06121f; background: var(--accent);
  padding: 12px 20px; border-radius: 9px; font-weight: 500; border: none; cursor: pointer;
  transition: filter .18s ease;
}
.v4-btn:hover { filter: brightness(1.08); }
.v4-btn--ghost {
  color: var(--accent); background: transparent;
  border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent);
  transition: background .18s ease;
}
.v4-btn--ghost:hover { filter: none; background: color-mix(in srgb, var(--accent) 10%, transparent); }
.v4-btn--plain { color: var(--ink-body); background: transparent; transition: color .18s ease; }
.v4-btn--plain:hover { filter: none; color: #fff; }

/* --------------------------------------------------------------------------
   Banners & notes
   -------------------------------------------------------------------------- */
.v4-banner {
  display: flex; gap: 18px; padding: 24px 28px; align-items: flex-start; flex-wrap: wrap;
  border: 1px solid color-mix(in srgb, var(--amber) 35%, transparent);
  border-radius: 13px; background: rgba(216,162,74,.06);
}
.v4-banner__dot { width: 11px; height: 11px; border-radius: 50%; background: var(--amber); box-shadow: 0 0 12px var(--amber); margin-top: 5px; flex-shrink: 0; }
.v4-banner__body { flex: 1; min-width: 260px; }
.v4-banner__head { font-family: var(--mono); font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--amber-bright); }
.v4-banner__text { margin: 10px 0 0; font-size: 14px; line-height: 1.6; color: #b8b09a; text-wrap: pretty; }
.v4-banner__text--lone { margin: 0; color: #c9c1a8; }
.v4-banner__text strong { color: var(--amber-bright); font-weight: 600; }

.v4-note {
  display: flex; gap: 20px; padding: 26px 28px; flex-wrap: wrap;
  border: 1px solid var(--hairline-banner); border-left: 3px solid var(--amber);
  border-radius: 12px; background: rgba(216,162,74,.045);
}
.v4-note__label {
  font-family: var(--mono); font-size: 10px; letter-spacing: .2em; text-transform: uppercase;
  color: var(--amber); white-space: nowrap; padding-top: 3px;
}
.v4-note__body { flex: 1; min-width: 280px; }
.v4-note p { margin: 0; font-size: 13.5px; line-height: 1.62; color: var(--ink-disc); text-wrap: pretty; }
.v4-note p + p { margin-top: 14px; color: var(--ink-mut1); }
.v4-note strong { color: #cbd2e8; font-weight: 600; }

/* --------------------------------------------------------------------------
   Cards
   -------------------------------------------------------------------------- */
.v4-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 18px; }
.v4-cards--sm { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 14px; }
.v4-cards--md { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.v4-cards--lg { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 14px; }
.v4-cards--wide { grid-template-columns: repeat(auto-fit, minmax(330px, 1fr)); }

.v4-card {
  display: flex; flex-direction: column;
  padding: 26px 28px 24px; border: 1px solid var(--hairline); border-radius: 15px;
  background: var(--card-grad);
}
.v4-card__idx { font-family: var(--mono); font-size: 13px; letter-spacing: .1em; color: var(--accent); }
.v4-card__label { font-family: var(--mono); font-size: 10.5px; letter-spacing: .16em; text-transform: uppercase; color: var(--accent); }
.v4-card .v4-h3 { font-size: 21px; line-height: 1.15; margin: 16px 0 0; }
.v4-card__body { font-size: 14px; line-height: 1.6; color: var(--ink-body); margin: 12px 0 0; flex: 1; text-wrap: pretty; }

.v4-card--hover { transition: border-color .22s ease, transform .22s ease; }
.v4-card--hover:hover { border-color: color-mix(in srgb, var(--accent) 45%, transparent); transform: translateY(-3px); }

/* Aside stack (form pages right rail) */
.v4-aside { display: flex; flex-direction: column; gap: 14px; }
.v4-aside__card { padding: 24px 26px; border: 1px solid var(--hairline); border-radius: 14px; background: rgba(255,255,255,.02); }
.v4-aside__card--amber { border-color: color-mix(in srgb, var(--amber) 30%, transparent); background: rgba(216,162,74,.05); }
.v4-aside__head { font-family: var(--mono); font-size: 10.5px; letter-spacing: .18em; text-transform: uppercase; color: var(--accent); margin-bottom: 12px; }
.v4-aside__head--amber { color: var(--amber-bright); display: flex; align-items: center; gap: 9px; margin-bottom: 0; letter-spacing: .14em; }
.v4-aside__card p { margin: 0; font-size: 13.5px; line-height: 1.65; color: var(--ink-body); text-wrap: pretty; }
.v4-aside__card--amber p { font-size: 13px; color: #b8b09a; }
.v4-aside__links { display: flex; flex-direction: column; gap: 10px; }
.v4-aside__links a { font-size: 13.5px; color: var(--ink-body); text-decoration: none; transition: color .18s ease; }
.v4-aside__links a:hover { color: #fff; }

/* --------------------------------------------------------------------------
   Data tables (CSS grid). Set columns per table:
   <div class="v4-table" style="--cols: 64px 1.1fr 1.5fr 1.6fr">
   -------------------------------------------------------------------------- */
.v4-scroll-x { overflow-x: auto; }
.v4-table { border: 1px solid var(--hairline); border-radius: 14px; overflow: hidden; background: rgba(255,255,255,.015); }
.v4-table__head {
  display: grid; grid-template-columns: var(--cols);
  font-family: var(--mono); font-size: 10px; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-mut3);
  background: rgba(255,255,255,.03); border-bottom: 1px solid var(--hairline-banner);
}
.v4-table__head > div { padding: 14px 16px; }
.v4-table__row { display: grid; grid-template-columns: var(--cols); border-bottom: 1px solid var(--hairline-row); }
.v4-table__row:last-child { border-bottom: none; }
.v4-table__row > div { padding: 16px; font-size: 13px; line-height: 1.55; color: var(--ink-body); }
.v4-table__row .c-id { font-family: var(--mono); font-size: 13px; color: var(--ink-mut3); }
.v4-table__row .c-id--accent { color: var(--accent); }
.v4-table__row .c-name { color: var(--ink-strong); font-weight: 500; font-size: 13.5px; }
.v4-table__row .c-dim { color: var(--ink-mut1); }
.v4-table__row .c-mono { font-family: var(--mono); font-size: 11.5px; line-height: 1.6; color: var(--ink-mut1); }
.v4-table__row .c-mid { align-self: center; }
.v4-table__row--gating { background: color-mix(in srgb, var(--accent) 5%, transparent); }
.v4-table--dense .v4-table__head > div { padding: 13px 14px; font-size: 9.5px; letter-spacing: .12em; }
.v4-table--dense .v4-table__row > div { padding: 15px 14px; font-size: 12.5px; }

/* Uncertainty / letter-ID register rows */
.v4-register { display: flex; flex-direction: column; gap: 1px; border: 1px solid var(--hairline); border-radius: 13px; overflow: hidden; background: rgba(255,255,255,.07); }
.v4-register__row { display: flex; gap: 18px; padding: 18px 24px; background: var(--row); align-items: baseline; }
.v4-register__id { font-family: var(--mono); font-size: 12px; color: var(--amber); flex-shrink: 0; }
.v4-register__row p { margin: 0; font-size: 14px; line-height: 1.6; color: var(--ink-lede); text-wrap: pretty; }

/* --------------------------------------------------------------------------
   Roadmap vertical timeline
   -------------------------------------------------------------------------- */
.v4-tl { position: relative; }
.v4-tl__track { position: absolute; left: 23px; top: 8px; bottom: 8px; width: 2px; background: var(--hairline); }
.v4-tl__progress { position: absolute; left: 23px; top: 8px; height: 30%; width: 2px; background: linear-gradient(180deg, var(--accent), color-mix(in srgb, var(--accent) 20%, transparent)); }
.v4-tl__items { display: flex; flex-direction: column; gap: 16px; }
.v4-tl__item { position: relative; display: flex; gap: 24px; align-items: flex-start; }
.v4-tl__num {
  flex-shrink: 0; width: 48px; height: 48px; border-radius: 50%; background: var(--row2);
  border: 2px solid rgba(255,255,255,.14); display: grid; place-items: center;
  font-family: var(--mono); font-size: 13px; font-weight: 500; color: var(--ink-mut3); z-index: 1;
}
.v4-tl__item--done .v4-tl__num { border-color: color-mix(in srgb, var(--accent) 55%, transparent); color: #cdd4ea; }
.v4-tl__item--current .v4-tl__num { border-color: var(--accent); color: var(--accent); box-shadow: 0 0 18px color-mix(in srgb, var(--accent) 55%, transparent); }
.v4-tl__card { flex: 1; padding: 20px 24px; border: 1px solid var(--hairline); border-radius: 13px; background: rgba(255,255,255,.02); }
.v4-tl__item--current .v4-tl__card { background: color-mix(in srgb, var(--accent) 6%, rgba(255,255,255,.012)); }
.v4-tl__cardhead { display: flex; flex-wrap: wrap; gap: 10px 16px; align-items: center; justify-content: space-between; }
.v4-tl__cardhead .v4-h3 { font-size: 19px; }
.v4-tl__item--done .v4-tag { --c: var(--green); }
.v4-tl__item--current .v4-tag { --c: var(--accent); }
.v4-tl__desc { margin: 12px 0 0; font-size: 14px; line-height: 1.6; color: var(--ink-body); text-wrap: pretty; }
.v4-tl__class { margin-top: 14px; font-family: var(--mono); font-size: 10.5px; letter-spacing: .06em; color: var(--ink-mut3); }

/* --------------------------------------------------------------------------
   Numbered-step rows (investor diligence)
   -------------------------------------------------------------------------- */
.v4-step { display: flex; gap: 18px; padding: 20px 22px; border: 1px solid var(--hairline-banner); border-radius: 13px; background: rgba(255,255,255,.02); align-items: flex-start; }
.v4-step__num {
  flex-shrink: 0; width: 34px; height: 34px; border-radius: 50%;
  border: 1px solid color-mix(in srgb, var(--accent) 45%, transparent);
  display: grid; place-items: center; font-family: var(--mono); font-size: 12.5px; color: var(--accent);
}
.v4-step p { margin: 4px 0 0; font-size: 13.5px; line-height: 1.6; color: var(--ink-lede); text-wrap: pretty; }

/* --------------------------------------------------------------------------
   Highlight side-border cards (overview: see / won't see)
   -------------------------------------------------------------------------- */
.v4-scope { padding: 28px 30px; border: 1px solid var(--hairline); border-radius: 13px; }
.v4-scope--in { border-left: 3px solid var(--accent); background: color-mix(in srgb, var(--accent) 5%, transparent); }
.v4-scope--out { border-left: 3px solid var(--ink-mut3); background: rgba(255,255,255,.02); }
.v4-scope__head { font-family: var(--mono); font-size: 10.5px; letter-spacing: .18em; text-transform: uppercase; margin-bottom: 14px; }
.v4-scope--in .v4-scope__head { color: var(--accent); }
.v4-scope--out .v4-scope__head { color: var(--ink-body); }
.v4-scope p { font-size: 14.5px; line-height: 1.62; margin: 0; text-wrap: pretty; }
.v4-scope--in p { color: #bcc4dd; }
.v4-scope--out p { color: var(--ink-body); }

/* --------------------------------------------------------------------------
   CTA panel (pilot "Discuss a pilot")
   -------------------------------------------------------------------------- */
.v4-cta-panel {
  display: flex; flex-wrap: wrap; gap: 24px 40px; align-items: center; justify-content: space-between;
  padding: 34px 36px; border-radius: 16px;
  border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
  background: color-mix(in srgb, var(--accent) 5%, transparent);
}
.v4-cta-panel__text { max-width: 600px; }
.v4-cta-panel .v4-h3 { font-size: 25px; }
.v4-cta-panel p { margin: 10px 0 0; font-size: 14.5px; line-height: 1.6; color: var(--ink-body); text-wrap: pretty; }
.v4-cta-panel .v4-btn { flex-shrink: 0; padding: 13px 22px; }

/* --------------------------------------------------------------------------
   Forms
   -------------------------------------------------------------------------- */
.v4-formgrid { display: grid; grid-template-columns: minmax(0,1.5fr) minmax(280px,1fr); gap: 40px; align-items: start; }
.v4-form-card { padding: 34px 36px 36px; border: 1px solid var(--hairline); border-radius: 16px; background: var(--card-grad); }
.v4-form-2col { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.v4-field { display: flex; flex-direction: column; gap: 8px; }
.v4-field + .v4-field, .v4-form-2col + .v4-field, .v4-field + .v4-form-2col, .v4-form-2col + .v4-form-2col { margin-top: 20px; }
.v4-field > span, .v4-field > label {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .16em; text-transform: uppercase; color: var(--ink-mut1);
}
.v4-field input, .v4-field textarea, .v4-field select {
  background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.12); border-radius: 9px;
  padding: 12px 14px; font-size: 14px; color: #eaeefb; font-family: var(--sans);
}
.v4-field textarea { line-height: 1.6; resize: vertical; }
.v4-field select { background: var(--row2); appearance: auto; }
.v4-field input:focus, .v4-field textarea:focus, .v4-field select:focus {
  outline: none; border-color: color-mix(in srgb, var(--accent) 55%, transparent);
}
.v4-smallprint { margin: 18px 0 0; font-size: 12px; line-height: 1.65; color: var(--ink-mut2); text-wrap: pretty; }
.v4-smallprint a { color: var(--accent); text-decoration: none; border-bottom: 1px solid color-mix(in srgb, var(--accent) 35%, transparent); }
.v4-form-actions { display: flex; align-items: center; gap: 18px; margin-top: 22px; flex-wrap: wrap; }
.v4-form-actions .v4-btn { padding: 13px 24px; }
.v4-form-actions a { font-family: var(--mono); font-size: 12px; letter-spacing: .05em; color: var(--ink-body); text-decoration: none; }
.v4-form-actions a:hover { color: #fff; }
.v4-hp { position: absolute; left: -10000px; top: auto; width: 1px; height: 1px; overflow: hidden; }

/* Form status blocks */
.v4-alert { padding: 26px 30px; border: 1px solid var(--hairline); border-radius: 14px; background: rgba(255,255,255,.02); }
.v4-alert h2 { font-family: var(--mono); font-size: 12px; letter-spacing: .14em; text-transform: uppercase; margin: 0 0 12px; }
.v4-alert--ok h2 { color: var(--green); }
.v4-alert--err { border-color: color-mix(in srgb, #d96a6a 45%, transparent); }
.v4-alert--err h2 { color: #d96a6a; }
.v4-alert p, .v4-alert li { font-size: 14px; line-height: 1.65; color: var(--ink-lede); }
.v4-alert p { margin: 0 0 12px; }
.v4-alert p:last-child { margin-bottom: 0; }
.v4-alert .dim { color: var(--ink-mut1); }
.v4-alert a { color: var(--accent); text-decoration: none; border-bottom: 1px solid color-mix(in srgb, var(--accent) 35%, transparent); }

/* --------------------------------------------------------------------------
   Landing-page specifics
   -------------------------------------------------------------------------- */
.v4-topband { display: flex; flex-wrap: wrap; gap: 16px 24px; align-items: center; justify-content: space-between; padding: 18px 0; border-bottom: 1px solid rgba(255,255,255,.07); }
.v4-topband__brand { display: flex; align-items: center; gap: 13px; }
.v4-topband__brand .v4-brand__mark { width: 32px; height: 32px; }
.v4-topband__brand .v4-brand__dot { width: 9px; height: 9px; box-shadow: 0 0 12px var(--accent); }
.v4-topband__brand .v4-brand__word { letter-spacing: .2em; }
.v4-topband__status {
  display: flex; flex-wrap: wrap; align-items: center; gap: 14px 18px;
  font-family: var(--mono); font-size: 11px; letter-spacing: .13em; text-transform: uppercase; color: var(--ink-mut1);
}
.v4-topband__status .stage { display: flex; align-items: center; gap: 8px; }
.v4-topband__status .trl { color: var(--ink-mut3); }
.v4-topband__status a { color: var(--accent); text-decoration: none; border-bottom: 1px solid color-mix(in srgb, var(--accent) 35%, transparent); padding-bottom: 1px; }

.v4-landing-hero { position: relative; padding: 96px 0 78px; }
.v4-landing-hero__canvas { position: absolute; top: 34px; left: -32px; width: calc(100% + 64px); height: 280px; opacity: .6; pointer-events: none; z-index: 0; }
.v4-landing-hero__inner { position: relative; z-index: 1; }
.v4-landing-hero__kicker { display: flex; align-items: center; gap: 14px; margin-bottom: 30px; }
.v4-landing-hero__rule { width: 30px; height: 1px; background: var(--accent); flex-shrink: 0; }
.v4-landing-hero__kicker span:last-child { font-family: var(--mono); font-size: 11.5px; letter-spacing: .24em; text-transform: uppercase; color: var(--ink-body); }
.v4-landing-hero .v4-h1 { font-size: clamp(44px, 6.4vw, 82px); line-height: 1.0; }
.v4-landing-hero .v4-h1 strong { font-weight: 500; }
.v4-landing-hero__lede { max-width: 690px; font-size: clamp(16px, 1.55vw, 19px); line-height: 1.62; color: var(--ink-lede); margin: 30px 0 0; text-wrap: pretty; }
.v4-landing-hero__lede strong { color: var(--ink-strong); font-weight: 600; }
.v4-landing-hero__sub { font-family: var(--mono); font-size: 13px; letter-spacing: .04em; color: var(--ink-body); margin: 22px 0 0; }
.v4-landing-hero__sub span { color: var(--accent); }

.v4-h2sm { font-family: var(--serif); font-weight: 500; font-size: 24px; margin: 0; color: var(--ink-h2); }
.v4-h2row--tight { margin-bottom: 26px; }
.v4-h2side--wide { letter-spacing: .18em; }

.v4-entry {
  position: relative; display: flex; flex-direction: column; min-height: 208px;
  padding: 26px 28px 24px; border: 1px solid var(--hairline); border-radius: 15px;
  background: var(--card-grad); text-decoration: none; color: inherit; overflow: hidden;
  transition: transform .26s ease, border-color .26s ease, box-shadow .26s ease;
}
.v4-entry:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--accent) 55%, transparent);
  box-shadow: 0 22px 54px -22px color-mix(in srgb, var(--accent) 65%, transparent);
}
.v4-entry__top { display: flex; justify-content: space-between; align-items: flex-start; }
.v4-entry__access { display: flex; align-items: center; gap: 7px; font-family: var(--mono); font-size: 10px; letter-spacing: .13em; text-transform: uppercase; color: var(--ink-mut1); }
.v4-entry__access .v4-dot { width: 6px; height: 6px; }
.v4-entry .v4-h3 { font-size: 25px; line-height: 1.12; margin: 22px 0 0; }
.v4-entry__blurb { font-size: 14px; line-height: 1.55; color: var(--ink-body); margin: 12px 0 0; flex: 1; text-wrap: pretty; }
.v4-entry__cta { display: flex; align-items: center; gap: 8px; margin-top: 20px; font-family: var(--mono); font-size: 12px; letter-spacing: .05em; color: var(--accent); }

/* Horizontal validation pathway strip */
.v4-path { position: relative; margin-top: 36px; }
.v4-path__track { position: absolute; left: 7px; right: 7px; top: 7px; height: 2px; background: var(--hairline-banner); }
.v4-path__progress { position: absolute; left: 7px; top: 7px; height: 2px; width: 22%; background: linear-gradient(90deg, color-mix(in srgb, var(--accent) 18%, transparent), var(--accent)); }
.v4-path__stages { position: relative; display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
.v4-path__stage { display: flex; flex-direction: column; align-items: flex-start; gap: 14px; }
.v4-path__dot { width: 15px; height: 15px; border-radius: 50%; background: #28324f; border: 3px solid var(--bg); }
.v4-path__stage--done .v4-path__dot, .v4-path__stage--current .v4-path__dot { background: var(--accent); }
.v4-path__stage--current .v4-path__dot { box-shadow: 0 0 16px var(--accent); }
.v4-path__trl { font-family: var(--mono); font-size: 11px; letter-spacing: .07em; color: var(--ink-mut4); }
.v4-path__stage--done .v4-path__trl { color: var(--ink-body); }
.v4-path__stage--current .v4-path__trl { color: var(--accent); }
.v4-path__name { font-size: 13.5px; margin-top: 5px; color: var(--ink-mut3); }
.v4-path__stage--done .v4-path__name { color: #c2cae3; }
.v4-path__stage--current .v4-path__name { color: #f2f5ff; }
.v4-path__current {
  display: inline-block; margin-top: 9px; font-family: var(--mono); font-size: 9.5px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--accent); border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent); border-radius: 20px; padding: 3px 9px;
}

/* Explore tile grid */
.v4-tiles {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(228px, 1fr)); gap: 1px;
  background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.07);
  border-radius: 12px; overflow: hidden;
}
.v4-tile {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 20px 22px; background: var(--row2); text-decoration: none; color: #c2cae3;
  transition: background .2s ease, color .2s ease;
}
.v4-tile:hover { background: #0e1735; color: #f2f5ff; }
.v4-tile__left { display: flex; align-items: center; gap: 12px; }
.v4-tile__num { font-family: var(--mono); font-size: 11px; color: var(--ink-mut4); }
.v4-tile__label { font-size: 14.5px; }
.v4-tile__arrow { color: var(--accent); font-family: var(--mono); }

/* Landing inline footer */
.v4-landing-footer { margin-top: 80px; padding: 34px 0 56px; border-top: 1px solid rgba(255,255,255,.07); }
.v4-landing-footer__top { display: flex; flex-wrap: wrap; gap: 24px 48px; justify-content: space-between; }
.v4-landing-footer__acronyms { font-family: var(--mono); font-size: 11.5px; line-height: 1.9; letter-spacing: .04em; color: var(--ink-mut2); }
.v4-landing-footer__acronyms strong { color: #aeb8d8; font-weight: 400; }
.v4-landing-footer__links { display: flex; flex-wrap: wrap; gap: 16px; align-items: flex-start; font-family: var(--mono); font-size: 11.5px; letter-spacing: .06em; }
.v4-landing-footer__links a { color: var(--ink-body); text-decoration: none; }
.v4-landing-footer__links a:hover { color: #fff; }
.v4-landing-footer__links .sep { color: #3c466a; }
.v4-landing-footer__legal { margin-top: 26px; font-family: var(--mono); font-size: 10.5px; line-height: 1.8; letter-spacing: .04em; color: var(--ink-mut4); }

/* --------------------------------------------------------------------------
   Prose / long-form section cards (technology page)
   -------------------------------------------------------------------------- */
.v4-prose-card { padding: 28px 30px; border: 1px solid var(--hairline); border-radius: 15px; background: linear-gradient(162deg, rgba(255,255,255,.035), rgba(255,255,255,.01)); }
.v4-prose-card__kicker { font-family: var(--mono); font-size: 10.5px; letter-spacing: .18em; text-transform: uppercase; color: var(--accent); margin-bottom: 12px; }
.v4-prose-card .v4-h2 { font-size: 23px; }
.v4-prose-card p { margin: 14px 0 0; font-size: 14px; line-height: 1.68; color: var(--ink-disc); text-wrap: pretty; }
.v4-stack { display: flex; flex-direction: column; gap: 14px; }
.v4-footnote { margin: 20px 0 0; max-width: 860px; font-size: 13.5px; line-height: 1.65; color: var(--ink-mut1); text-wrap: pretty; }

/* Two-column "who is this for" split */
.v4-split { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px 56px; align-items: start; }
.v4-split__body p { font-size: 15px; line-height: 1.66; color: #aab3d0; margin: 0; text-wrap: pretty; }
.v4-split__body p + p { margin-top: 18px; color: var(--ink-mut1); }
.v4-split__body strong { color: #e0e5f6; font-weight: 600; }
.v4-split__body { max-width: 640px; }

/* --------------------------------------------------------------------------
   Responsive & motion
   -------------------------------------------------------------------------- */
@media (max-width: 820px) {
  .v4-form-2col { grid-template-columns: 1fr; }
  .v4-formgrid { grid-template-columns: 1fr; }
  .v4-path__stages { grid-template-columns: repeat(2, 1fr); row-gap: 26px; }
  .v4-path__track, .v4-path__progress { display: none; }
  .v4-main { padding: 0 20px; }
  .v4-header__inner { padding: 13px 20px; }
  .v4-footer__inner { padding: 48px 20px 40px; }
}
@media (prefers-reduced-motion: reduce) {
  body.v4 *, body.v4 *::before, body.v4 *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}
