/* ============================================================
   FIT4RACE v2 — "pit wall" telemetry aesthetic
   dark steel · racing yellow · condensed display · mono data
   ============================================================ */

:root {
  /* brand */
  --steel-0: #0d1216;
  --steel-1: #141b21;
  --steel-2: #1c252c;
  --steel-3: #2a343c;
  --steel-4: #5d6368;
  --steel-5: #9ea2a5;
  --yellow: #f8d000;
  --yellow-soft: #fbe46b;
  --yellow-deep: #e6bf00;
  --white: #f4f6f8;
  --ink: #11161a;

  --hairline: rgba(158, 162, 165, 0.16);
  --card: rgba(255, 255, 255, 0.03);

  --font-display: "Archivo Expanded", "Archivo", sans-serif;
  --font-body: "Archivo", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;

  --maxw: 1240px;
  --pad: clamp(20px, 4vw, 48px);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--steel-1);
  color: var(--white);
  line-height: 1.5;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

::selection { background: var(--yellow); color: var(--ink); }

/* ---------- ambient background ---------- */
.bg-grid {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(158, 162, 165, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(158, 162, 165, 0.045) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(120% 70% at 50% 0%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(120% 70% at 50% 0%, #000 30%, transparent 80%);
}
.bg-glow {
  position: fixed; top: -320px; left: 50%; transform: translateX(-50%);
  width: 1200px; height: 680px; z-index: 0; pointer-events: none;
  background: radial-gradient(closest-side, rgba(248, 208, 0, 0.07), transparent 70%);
}

main, .nav, .footer { position: relative; z-index: 1; }

/* ---------- shared bits ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px; font-weight: 500;
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--steel-5);
}
.tick {
  width: 22px; height: 2px; background: var(--yellow); display: inline-block;
}

.section-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 4.6vw, 54px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  margin-top: 18px;
}
.section-title .dim { color: var(--steel-4); }
.accent-ink { color: var(--yellow); }
.section-sub {
  margin-top: 16px; max-width: 520px;
  color: var(--steel-5); font-size: 16px;
}
.section-head { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--pad); }

/* buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-weight: 600;
  font-size: 13px; letter-spacing: 0.1em; text-transform: uppercase;
  padding: 14px 26px;
  border: 1px solid transparent;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease),
    color 0.25s var(--ease), border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
}
.btn-solid { background: var(--yellow); color: var(--ink); }
.btn-solid:hover { background: var(--yellow-soft); transform: translateY(-2px); box-shadow: 0 10px 30px rgba(248, 208, 0, 0.25); }
.btn-ghost { border-color: var(--hairline); color: var(--white); background: transparent; }
.btn-ghost:hover { border-color: var(--yellow); color: var(--yellow); transform: translateY(-2px); }
.btn-lg { padding: 18px 34px; font-size: 14px; }

/* reveal-on-scroll */
.reveal {
  opacity: 0; transform: translateY(26px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
  transition-delay: var(--d, 0ms);
}
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(20, 27, 33, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--hairline);
}
.nav-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 0 var(--pad);
  height: 72px;
  display: flex; align-items: center; gap: 40px;
}
.logo img { height: 30px; width: auto; }
.menu { display: flex; gap: 30px; margin-left: auto; }
.menu a {
  font-family: var(--font-mono); font-size: 12.5px; font-weight: 500;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--steel-5);
  padding: 6px 0; position: relative;
  transition: color 0.25s var(--ease);
}
.menu a::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 0; height: 2px; background: var(--yellow);
  transition: width 0.3s var(--ease);
}
.menu a:hover { color: var(--white); }
.menu a:hover::after { width: 100%; }
.nav-cta { padding: 11px 20px; font-size: 12px; }
.nav-burger { display: none; }

/* ============================================================
   HERO
   ============================================================ */
.hero { padding: clamp(48px, 8vh, 90px) 0 0; }
.hero-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 0 var(--pad);
  display: grid; grid-template-columns: 1.1fr 0.9fr;
  align-items: center; gap: 40px;
  min-height: min(66vh, 640px);
}
.hero-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(44px, 6.6vw, 88px);
  line-height: 0.98;
  letter-spacing: -0.015em;
  text-transform: uppercase;
  margin-top: 20px;
}
.hero-title .line { display: block; }
.hero-title .accent {
  color: var(--yellow);
  text-shadow: 0 0 60px rgba(248, 208, 0, 0.35);
}
.hero-sub {
  margin-top: 26px; max-width: 440px;
  font-size: clamp(16px, 1.6vw, 19px);
  color: var(--steel-5);
}
.hero-actions { margin-top: 36px; display: flex; gap: 14px; flex-wrap: wrap; }

/* hero figure with telemetry tags */
.hero-figure { position: relative; align-self: end; margin: 0; }
.hero-halo {
  position: absolute; inset: auto 0 -10% 0; height: 90%;
  background: radial-gradient(closest-side, rgba(248, 208, 0, 0.14), transparent 72%);
  filter: blur(6px);
}
.hero-figure img {
  position: relative;
  max-height: min(58vh, 560px);
  width: auto;
  margin: 0 auto;
  filter: drop-shadow(0 30px 50px rgba(0, 0, 0, 0.5));
}
.hero-tag {
  position: absolute;
  display: flex; flex-direction: column; gap: 2px;
  padding: 8px 12px;
  background: rgba(13, 18, 22, 0.85);
  border: 1px solid var(--hairline);
  border-left: 2px solid var(--yellow);
  backdrop-filter: blur(6px);
  animation: tag-bob 5s ease-in-out infinite;
}
.hero-tag .ht-k {
  font-family: var(--font-mono); font-size: 9.5px; letter-spacing: 0.16em;
  color: var(--steel-5);
}
.hero-tag .ht-v {
  font-family: var(--font-mono); font-size: 15px; font-weight: 600;
  color: var(--yellow);
}
.hero-tag-1 { top: 16%; left: 2%; animation-delay: 0s; }
.hero-tag-2 { top: 42%; right: 0%; animation-delay: 1.4s; }
.hero-tag-3 { bottom: 18%; left: 6%; animation-delay: 2.6s; }
@keyframes tag-bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* stat strip */
.stat-strip {
  margin-top: clamp(36px, 6vh, 64px);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  background: rgba(13, 18, 22, 0.5);
}
.stat-strip { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat {
  padding: 26px var(--pad);
  display: flex; align-items: baseline; gap: 6px; flex-wrap: wrap;
  border-right: 1px solid var(--hairline);
}
.stat:last-child { border-right: none; }
.stat-n {
  font-family: var(--font-display); font-weight: 800;
  font-size: clamp(26px, 3vw, 38px); line-height: 1;
  color: var(--white);
  font-variant-numeric: tabular-nums;
}
.stat-plus {
  font-family: var(--font-display); font-weight: 800;
  font-size: clamp(16px, 1.8vw, 22px);
  color: var(--yellow);
}
.stat-l {
  width: 100%;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--steel-5);
  margin-top: 8px;
}

/* ============================================================
   WHO IT'S FOR
   ============================================================ */
.who { padding: clamp(80px, 12vh, 140px) 0 0; }
.who-grid {
  max-width: var(--maxw); margin: 48px auto 0; padding: 0 var(--pad);
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
}
.who-card {
  position: relative; overflow: hidden;
  min-height: 380px;
  background: linear-gradient(180deg, var(--card), rgba(255, 255, 255, 0.015));
  border: 1px solid var(--hairline);
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: 22px;
  transition: border-color 0.35s var(--ease), transform 0.35s var(--ease);
}
.who-card:hover { border-color: rgba(248, 208, 0, 0.5); transform: translateY(-6px); }
.who-num {
  position: absolute; top: 14px; left: 18px;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.14em;
  color: var(--steel-4);
}
.who-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: var(--yellow);
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.4s var(--ease);
}
.who-card:hover::before { transform: scaleX(1); }
.who-figure {
  position: absolute; top: 8%; left: 50%; transform: translateX(-50%);
  height: 68%; width: auto; max-width: none;
  filter: grayscale(0.7) brightness(0.75) drop-shadow(0 16px 26px rgba(0, 0, 0, 0.45));
  transition: filter 0.45s var(--ease), transform 0.45s var(--ease);
}
.who-card:hover .who-figure {
  filter: grayscale(0) brightness(1) drop-shadow(0 16px 30px rgba(0, 0, 0, 0.55));
  transform: translateX(-50%) scale(1.04);
}
.who-card.is-featured { border-color: rgba(248, 208, 0, 0.35); }
.who-card.is-featured .who-figure { filter: grayscale(0.15) brightness(0.95) drop-shadow(0 16px 26px rgba(0, 0, 0, 0.45)); }
.who-meta {
  position: relative;
  padding-top: 14px;
  background: linear-gradient(180deg, transparent, rgba(13, 18, 22, 0.4) 30%);
}
.who-meta h3 {
  font-family: var(--font-display); font-weight: 800;
  font-size: 20px; text-transform: uppercase; letter-spacing: 0.01em;
}
.who-meta p { margin-top: 6px; font-size: 13.5px; color: var(--steel-5); }

/* ============================================================
   METHOD — human vs machine spec sheet (light section)
   ============================================================ */
.method {
  margin-top: clamp(90px, 14vh, 160px);
  background: var(--white);
  color: var(--ink);
  position: relative;
  /* angled top+bottom edges, like a livery stripe */
  clip-path: polygon(0 clamp(20px, 3vw, 44px), 100% 0, 100% calc(100% - clamp(20px, 3vw, 44px)), 0 100%);
  padding: clamp(90px, 12vh, 150px) 0;
}
.method-inner { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--pad); }
.method .eyebrow { color: var(--steel-3); }
.method .section-sub { color: var(--steel-3); }
.method .accent-ink {
  color: var(--ink);
  background: linear-gradient(transparent 58%, var(--yellow) 58%, var(--yellow) 92%, transparent 92%);
}

.spec-sheet {
  margin-top: 54px;
  border: 1px solid rgba(28, 37, 44, 0.14);
  background: #fff;
  box-shadow: 0 30px 60px rgba(28, 37, 44, 0.08);
}
.spec-head {
  display: grid; grid-template-columns: 1fr 60px 1fr;
  padding: 16px 28px;
  background: var(--ink); color: var(--white);
  font-family: var(--font-mono); font-size: 11px; font-weight: 600;
  letter-spacing: 0.2em; text-transform: uppercase;
}
.spec-head span:last-child { text-align: right; color: var(--yellow); }
.spec-row {
  display: grid; grid-template-columns: 1fr 60px 1fr;
  align-items: center;
  padding: 17px 28px;
  border-top: 1px solid rgba(28, 37, 44, 0.08);
  transition: background 0.25s var(--ease);
}
.spec-row:hover { background: rgba(248, 208, 0, 0.1); }
.spec-h {
  font-family: var(--font-display); font-weight: 700; font-size: clamp(15px, 1.7vw, 19px);
  text-transform: uppercase; letter-spacing: 0.01em;
}
.spec-m {
  text-align: right;
  font-family: var(--font-mono); font-weight: 500; font-size: clamp(13px, 1.5vw, 16px);
  color: var(--steel-3);
}
.spec-line { position: relative; height: 1px; background: rgba(28, 37, 44, 0.18); }
.spec-line::after {
  content: ""; position: absolute; right: -1px; top: -2.5px;
  width: 6px; height: 6px; background: var(--yellow);
  transform: rotate(45deg);
  opacity: 0; transition: opacity 0.25s var(--ease);
}
.spec-row:hover .spec-line::after { opacity: 1; }

/* ============================================================
   SERVICES — 3 pillars
   ============================================================ */
.services { padding: clamp(90px, 14vh, 160px) 0 0; }
.pillars {
  max-width: var(--maxw); margin: 52px auto 0; padding: 0 var(--pad);
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
}
.pillar {
  position: relative;
  padding: 30px 28px 34px;
  background: linear-gradient(180deg, var(--card), rgba(255, 255, 255, 0.012));
  border: 1px solid var(--hairline);
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
}
.pillar:hover { transform: translateY(-8px); border-color: rgba(248, 208, 0, 0.5); box-shadow: 0 24px 50px rgba(0, 0, 0, 0.35); }
.pillar.is-mid { border-color: rgba(248, 208, 0, 0.35); background: linear-gradient(180deg, rgba(248, 208, 0, 0.06), rgba(255, 255, 255, 0.012)); }
.pillar-top { display: flex; justify-content: space-between; align-items: center; }
.pillar-num {
  font-family: var(--font-display); font-weight: 800; font-size: 40px;
  color: transparent;
  -webkit-text-stroke: 1.2px rgba(248, 208, 0, 0.75);
  line-height: 1;
}
.pillar-lap {
  font-family: var(--font-mono); font-size: 10.5px; font-weight: 600;
  letter-spacing: 0.2em; color: var(--steel-5);
  border: 1px solid var(--hairline);
  padding: 5px 10px;
}
.pillar h3 {
  margin-top: 22px;
  font-family: var(--font-display); font-weight: 800;
  font-size: clamp(21px, 2.2vw, 26px); line-height: 1.1;
  text-transform: uppercase;
}
.pillar p { margin-top: 14px; font-size: 14.5px; color: var(--steel-5); }
.pillar ul { margin-top: 18px; list-style: none; }
.pillar li {
  font-family: var(--font-mono); font-size: 12.5px; letter-spacing: 0.04em;
  color: var(--white);
  padding: 8px 0 8px 22px;
  border-top: 1px solid var(--hairline);
  position: relative;
}
.pillar li::before {
  content: ""; position: absolute; left: 2px; top: 50%;
  width: 8px; height: 8px; transform: translateY(-50%) rotate(45deg);
  background: var(--yellow);
}

/* ============================================================
   RESULTS
   ============================================================ */
.results { padding: clamp(90px, 14vh, 160px) 0 0; }
.charts {
  max-width: var(--maxw); margin: 52px auto 0; padding: 0 var(--pad);
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
}
.chart {
  margin: 0; padding: 22px 22px 10px;
  background: linear-gradient(180deg, var(--card), rgba(255, 255, 255, 0.012));
  border: 1px solid var(--hairline);
}
.chart.is-good { border-color: rgba(248, 208, 0, 0.4); }
.chart figcaption {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-mono); font-size: 12px; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--steel-5);
  margin-bottom: 10px;
}
.chart.is-good figcaption { color: var(--yellow); }
.chip { width: 10px; height: 10px; display: inline-block; transform: rotate(45deg); }
.chip-bad { background: var(--steel-4); }
.chip-good { background: var(--yellow); }
.chart svg { width: 100%; height: auto; }
.chart .grid { stroke: rgba(158, 162, 165, 0.12); stroke-dasharray: 3 5; }
.chart .axis { stroke: rgba(158, 162, 165, 0.3); }
.trace { fill: none; stroke-width: 2.5; stroke-linejoin: round; stroke-linecap: round; }
.trace.bad { stroke: var(--steel-4); }
.trace.good { stroke: var(--yellow); filter: drop-shadow(0 0 8px rgba(248, 208, 0, 0.5)); }
.chart .in-view .trace { }
.dot.bad { fill: #ff5a5a; }
.dnf { font-family: var(--font-mono); font-size: 11px; fill: #ff8080; letter-spacing: 0.1em; }
.fin { font-family: var(--font-mono); font-size: 11.5px; fill: var(--yellow); letter-spacing: 0.1em; }
.ax { font-family: var(--font-mono); font-size: 10.5px; fill: var(--steel-4); }

/* trace draw-in when revealed */
.charts.in .trace {
  stroke-dasharray: 900; stroke-dashoffset: 900;
  animation: draw 1.6s var(--ease) forwards 0.2s;
}
@keyframes draw { to { stroke-dashoffset: 0; } }

/* proof cards */
.proof {
  max-width: var(--maxw); margin: 16px auto 0; padding: 0 var(--pad);
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
}
.proof-card {
  padding: 24px 26px;
  background: linear-gradient(180deg, var(--card), rgba(255, 255, 255, 0.012));
  border: 1px solid var(--hairline);
  border-left: 2px solid var(--yellow);
}
.proof-card p {
  font-family: var(--font-display); font-weight: 700; font-size: 17px;
  line-height: 1.25;
}
.proof-card footer { margin-top: 14px; display: flex; flex-direction: column; gap: 2px; }
.proof-card strong { font-size: 14px; color: var(--white); }
.proof-card span { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--steel-5); }

/* trusted marquee */
.trusted { margin-top: clamp(60px, 9vh, 100px); border-top: 1px solid var(--hairline); border-bottom: 1px solid var(--hairline); padding: 28px 0; background: rgba(13, 18, 22, 0.5); }
.trusted-label {
  text-align: center;
  font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  letter-spacing: 0.22em; text-transform: uppercase; color: var(--steel-4);
  margin-bottom: 20px;
}
.marquee { overflow: hidden; mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); }
.marquee-track { display: flex; width: max-content; animation: slide 28s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-group { display: flex; align-items: center; gap: clamp(48px, 7vw, 96px); padding-right: clamp(48px, 7vw, 96px); }
.marquee-group img {
  height: 44px; width: auto;
  filter: grayscale(1) brightness(2.2) opacity(0.7);
  transition: filter 0.3s var(--ease);
}
.marquee-group img:hover { filter: grayscale(0) brightness(1) opacity(1); }
@keyframes slide { to { transform: translateX(-50%); } }

/* ============================================================
   CTA
   ============================================================ */
.cta { padding: clamp(100px, 16vh, 180px) 0; position: relative; }
.cta-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 0 var(--pad);
  text-align: center;
  position: relative;
}
.cta-flag {
  width: 84px; height: 44px; margin: 0 auto 30px;
  background:
    conic-gradient(#fff 90deg, var(--steel-2) 90deg 180deg, #fff 180deg 270deg, var(--steel-2) 270deg);
  background-size: 22px 22px;
  opacity: 0.9;
  clip-path: polygon(0 0, 100% 6%, 94% 100%, 2% 92%);
}
.cta-title {
  font-family: var(--font-display); font-weight: 900;
  font-size: clamp(38px, 6vw, 76px); line-height: 1;
  text-transform: uppercase; letter-spacing: -0.01em;
}
.cta-sub { margin-top: 20px; color: var(--steel-5); font-size: 17px; }
.cta-actions { margin-top: 40px; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ============================================================
   FOOTER
   ============================================================ */
.footer { border-top: 1px solid var(--hairline); background: var(--steel-0); }
.footer-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 56px var(--pad);
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px;
}
.footer-brand img { height: 32px; width: auto; }
.footer-brand p {
  margin-top: 16px;
  font-family: var(--font-display); font-weight: 700; font-size: 16px;
  text-transform: uppercase; color: var(--steel-5); line-height: 1.3;
}
.footer-col h4 {
  font-family: var(--font-mono); font-size: 11px; font-weight: 600;
  letter-spacing: 0.2em; text-transform: uppercase; color: var(--yellow);
  margin-bottom: 14px;
}
.footer-col p { font-size: 14px; color: var(--steel-5); line-height: 1.8; }
.footer-col a { transition: color 0.25s var(--ease); }
.footer-col a:hover { color: var(--white); }
.footer-base {
  border-top: 1px solid var(--hairline);
  max-width: var(--maxw); margin: 0 auto; padding: 20px var(--pad);
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-size: 12.5px; color: var(--steel-4);
}
.footer-mono { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .who-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-inner { grid-template-columns: 1fr; min-height: 0; }
  .hero-figure { display: none; }
  .stat-strip { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2) { border-right: none; }
  .stat { border-bottom: 1px solid var(--hairline); }
  .stat:nth-child(n + 3) { border-bottom: none; }
}

@media (max-width: 760px) {
  .menu, .nav-cta { display: none; }
  .nav-burger {
    display: flex; flex-direction: column; gap: 6px;
    margin-left: auto; background: none; border: none; cursor: pointer; padding: 8px;
  }
  .nav-burger span { width: 24px; height: 2px; background: var(--white); transition: transform 0.3s var(--ease), opacity 0.3s; }
  .nav.menu-open .nav-burger span:first-child { transform: translateY(4px) rotate(45deg); }
  .nav.menu-open .nav-burger span:last-child { transform: translateY(-4px) rotate(-45deg); }
  .nav.menu-open .menu {
    display: flex; flex-direction: column; gap: 0;
    position: absolute; top: 72px; left: 0; right: 0;
    background: var(--steel-0); border-bottom: 1px solid var(--hairline);
    padding: 10px 0;
  }
  .nav.menu-open .menu a { padding: 14px var(--pad); }

  .pillars, .charts, .proof { grid-template-columns: 1fr; }
  .who-grid { grid-template-columns: 1fr; }
  .who-card { min-height: 320px; }
  .spec-head, .spec-row { grid-template-columns: 1fr 28px 1fr; padding: 14px 18px; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}