/* Helisys — site styles
   Brand: black and white, greys for text and borders. Product logos are the only colour.
   Type: Space Grotesk (headings), Inter (body). */

:root {
  --black: #000000;
  --white: #FFFFFF;
  --surface: #0A0A0A;
  --surface-2: #111113;
  --line-dark: #27272A;
  --grey-700: #3F3F46;
  --grey-600: #52525B;
  --grey-500: #71717A;
  --grey-400: #A1A1AA;
  --grey-300: #D4D4D8;
  --grey-200: #E4E4E7;
  --grey-100: #F4F4F5;
  --font-head: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --container: 1240px;
  --radius: 16px;
  --radius-sm: 10px;
  --header-h: 72px;
  --ease: cubic-bezier(.2, .7, .2, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 16px); }
body {
  margin: 0;
  background: var(--black);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
h1, h2, h3, h4 { font-family: var(--font-head); font-weight: 600; margin: 0; line-height: 1.05; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
button { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid currentColor; outline-offset: 3px; border-radius: 4px; }

.skip-link {
  position: absolute; left: 16px; top: -60px; z-index: 100;
  background: var(--white); color: var(--black); padding: 10px 16px; border-radius: 8px;
  text-decoration: none; font-weight: 600;
}
.skip-link:focus { top: 12px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }

.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: 24px; }
.section { padding-block: clamp(72px, 9vw, 128px); }
.section-tight { padding-block: clamp(48px, 6vw, 72px); }
.light { background: var(--white); color: var(--black); }
.soft { background: var(--grey-100); color: var(--black); }
.dark { background: var(--black); color: var(--white); }
.border-top { border-top: 1px solid var(--line-dark); }
.light .border-top, .soft .border-top { border-top-color: var(--grey-200); }

/* Type */
.eyebrow { font-size: 13px; font-weight: 500; letter-spacing: .16em; text-transform: uppercase; color: var(--grey-400); }
.light .eyebrow, .soft .eyebrow { color: var(--grey-600); }
.display { font-size: clamp(48px, 8.4vw, 116px); letter-spacing: -.04em; line-height: .98; }
.h1 { font-size: clamp(42px, 6.6vw, 88px); letter-spacing: -.035em; line-height: 1; }
.h2 { font-size: clamp(34px, 4.8vw, 60px); letter-spacing: -.03em; }
.h3 { font-size: clamp(24px, 2.4vw, 30px); letter-spacing: -.015em; line-height: 1.15; }
.lead { font-size: clamp(18px, 1.6vw, 21px); line-height: 1.6; color: var(--grey-400); max-width: 46ch; }
.light .lead, .soft .lead { color: var(--grey-600); }
.muted { color: var(--grey-400); }
.light .muted, .soft .muted { color: var(--grey-600); }
.small { font-size: 14px; }
.stack { display: flex; flex-direction: column; gap: 20px; }
.stack-sm { display: flex; flex-direction: column; gap: 10px; }
.section-head { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 24px; margin-bottom: clamp(36px, 5vw, 56px); }
.section-head > div { max-width: 760px; display: flex; flex-direction: column; gap: 16px; }

/* Buttons and links */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 48px; padding: 0 26px; border-radius: var(--radius-sm);
  font-size: 16px; font-weight: 500; text-decoration: none; cursor: pointer;
  border: 1px solid transparent; transition: background .2s, color .2s, border-color .2s, transform .2s;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--white); color: var(--black); }
.btn-primary:hover { background: var(--grey-300); }
.btn-ghost { border-color: var(--grey-700); color: var(--white); background: transparent; }
.btn-ghost:hover { border-color: var(--white); }
.light .btn-primary, .soft .btn-primary { background: var(--black); color: var(--white); }
.light .btn-primary:hover, .soft .btn-primary:hover { background: var(--grey-700); }
.light .btn-ghost, .soft .btn-ghost { border-color: var(--grey-400); color: var(--black); }
.light .btn-ghost:hover, .soft .btn-ghost:hover { border-color: var(--black); }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; }
.arrow-link { display: inline-flex; align-items: center; gap: 8px; font-weight: 500; text-decoration: none; }
.arrow-link svg { width: 16px; height: 16px; transition: transform .2s var(--ease); }
.arrow-link:hover svg { transform: translateX(4px); }

/* Header */
.utility { border-bottom: 1px solid var(--line-dark); font-size: 13px; }
.utility .container { display: flex; justify-content: space-between; align-items: center; gap: 16px; min-height: 38px; }
.utility nav { display: flex; gap: 22px; }
.utility a { color: var(--grey-400); text-decoration: none; }
.utility a:hover { color: var(--white); }
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(0, 0, 0, .86); backdrop-filter: saturate(160%) blur(14px); -webkit-backdrop-filter: saturate(160%) blur(14px); border-bottom: 1px solid var(--line-dark); }
.header-bar { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: var(--header-h); }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--white); }
.brand-mark { display: flex; gap: 4px; }
.brand-mark span { display: block; width: 7px; height: 26px; border-radius: 4px; background: var(--white); }
.brand-mark span + span { background: var(--grey-500); margin-top: 6px; }
.brand-word { font-family: var(--font-head); font-size: 23px; font-weight: 600; letter-spacing: -.02em; }

.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav > ul { display: flex; align-items: center; gap: 4px; }
.nav-link, .nav-trigger {
  display: inline-flex; align-items: center; gap: 6px; min-height: 44px; padding: 0 14px;
  border-radius: 8px; color: var(--grey-300); text-decoration: none; font-size: 15px;
  background: none; border: 0; cursor: pointer;
}
.nav-link:hover, .nav-trigger:hover, .nav-trigger[aria-expanded="true"], .nav-link[aria-current="page"] { color: var(--white); background: rgba(255, 255, 255, .06); }
.nav-trigger svg { width: 12px; height: 12px; transition: transform .2s; }
.nav-trigger[aria-expanded="true"] svg { transform: rotate(180deg); }
.nav-cta { margin-left: 12px; min-height: 42px; padding: 0 18px; font-size: 15px; }
.has-menu { position: relative; }
.menu-panel {
  position: absolute; top: calc(100% + 10px); left: 0; min-width: 300px;
  background: var(--surface); border: 1px solid var(--line-dark); border-radius: var(--radius);
  padding: 12px; box-shadow: 0 24px 60px rgba(0, 0, 0, .55);
  opacity: 0; visibility: hidden; transform: translateY(-6px); transition: opacity .18s, transform .18s, visibility .18s;
}
.has-menu.open > .menu-panel { opacity: 1; visibility: visible; transform: none; }
.menu-panel a { display: block; padding: 12px 14px; border-radius: 10px; text-decoration: none; }
.menu-panel a:hover { background: rgba(255, 255, 255, .06); }
.menu-panel .menu-title { display: block; font-weight: 500; color: var(--white); }
.menu-panel .menu-desc { display: block; font-size: 13px; color: var(--grey-400); line-height: 1.45; margin-top: 2px; }

.mega { position: static; }
.mega > .menu-panel {
  left: 50%; width: min(1192px, calc(100vw - 48px)); transform: translate(-50%, -6px);
  top: calc(var(--header-h) - 4px); padding: 28px;
}
.mega.open > .menu-panel { transform: translate(-50%, 0); }
.mega-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 8px 20px; }
.mega-col h3 { font-family: var(--font-body); font-size: 12px; font-weight: 500; letter-spacing: .14em; text-transform: uppercase; color: var(--grey-500); padding: 0 14px 8px; }
.mega-foot { margin-top: 20px; padding: 18px 14px 0; border-top: 1px solid var(--line-dark); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; font-size: 14px; }
.mega-foot a { padding: 0; display: inline-flex; color: var(--white); }
.mega-foot a:hover { background: none; text-decoration: underline; }

.nav-toggle { display: none; width: 44px; height: 44px; border: 1px solid var(--grey-700); border-radius: 10px; background: none; cursor: pointer; align-items: center; justify-content: center; }
.nav-toggle svg { width: 20px; height: 20px; }
.nav-toggle .icon-close { display: none; }
.nav-open .nav-toggle .icon-close { display: block; }
.nav-open .nav-toggle .icon-open { display: none; }

@media (max-width: 1080px) {
  .utility { display: none; }
  .nav-toggle { display: inline-flex; }
  .main-nav {
    position: fixed; inset: var(--header-h) 0 0 0; background: var(--black); z-index: 49;
    flex-direction: column; align-items: stretch; padding: 16px 24px 40px; overflow-y: auto;
    display: none;
  }
  .nav-open .main-nav { display: flex; }
  .nav-open .site-header { backdrop-filter: none; -webkit-backdrop-filter: none; background: var(--black); }
  .nav-open { overflow: hidden; }
  .main-nav > ul { flex-direction: column; align-items: stretch; gap: 0; }
  .main-nav > ul > li { border-bottom: 1px solid var(--line-dark); }
  .nav-link, .nav-trigger { width: 100%; justify-content: space-between; min-height: 56px; padding: 0 4px; font-size: 18px; color: var(--white); border-radius: 0; }
  .nav-link:hover, .nav-trigger:hover, .nav-trigger[aria-expanded="true"], .nav-link[aria-current="page"] { background: none; }
  .menu-panel, .mega > .menu-panel {
    position: static; width: auto; min-width: 0; transform: none; box-shadow: none; border: 0; background: none;
    padding: 0 0 12px; display: none; opacity: 1; visibility: visible;
  }
  .has-menu.open > .menu-panel, .mega.open > .menu-panel { display: block; transform: none; }
  .mega-grid { grid-template-columns: 1fr; gap: 12px; }
  .mega-col h3 { padding: 8px 4px 4px; }
  .menu-panel a { padding: 10px 4px; }
  .mega-foot { padding: 12px 4px 0; }
  .nav-cta { margin: 24px 0 0; min-height: 52px; }
  .mobile-only { display: block; }
}
@media (min-width: 1081px) { .mobile-only { display: none; } }

/* Hero */
.hero { position: relative; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr); gap: 48px; align-items: center; padding-block: clamp(72px, 10vw, 136px) clamp(64px, 8vw, 112px); }
.hero-copy { display: flex; flex-direction: column; gap: 28px; }
.page-hero { padding-block: clamp(72px, 9vw, 120px) clamp(56px, 7vw, 88px); }
.page-hero .container { display: flex; flex-direction: column; gap: 24px; }
.page-hero .lead { max-width: 58ch; }
.breadcrumb { font-size: 14px; color: var(--grey-400); display: flex; gap: 8px; }
.breadcrumb a { color: var(--grey-400); text-decoration: none; }
.breadcrumb a:hover { color: var(--white); }
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; } .helix-wrap { display: none; } }

/* Helix animation */
.helix-wrap { display: flex; justify-content: center; }
.helix { --r: 96px; --dur: 3.2s; display: flex; flex-direction: column; gap: 16px; padding: 8px 0; }
.helix .row { position: relative; width: calc(var(--r) * 2 + 16px); height: 10px; display: flex; align-items: center; justify-content: center; }
.helix .rung { position: absolute; left: 8px; right: 8px; height: 1px; background: var(--grey-700); animation: rung var(--dur) ease-in-out infinite; animation-delay: var(--d); }
.helix .dot { position: absolute; left: 50%; top: 0; width: 10px; height: 10px; margin-left: -5px; border-radius: 50%; animation: strandA var(--dur) ease-in-out infinite alternate; animation-delay: var(--d); }
.helix .dot.a { background: var(--white); }
.helix .dot.b { background: var(--grey-500); animation-name: strandB; }
@keyframes strandA { from { transform: translateX(calc(var(--r) * -1)) scale(.75); } 50% { transform: translateX(0) scale(1.15); } to { transform: translateX(var(--r)) scale(.75); } }
@keyframes strandB { from { transform: translateX(var(--r)) scale(.75); } 50% { transform: translateX(0) scale(.6); } to { transform: translateX(calc(var(--r) * -1)) scale(.75); } }
@keyframes rung { 0%, 100% { transform: scaleX(1); } 50% { transform: scaleX(0); } }

/* Platform strip */
.platform-strip { border-top: 1px solid var(--line-dark); border-bottom: 1px solid var(--line-dark); }
.platform-strip ul { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 32px; padding-block: 26px; }
.platform-strip a { text-decoration: none; font-family: var(--font-head); font-size: 20px; font-weight: 600; color: var(--grey-400); transition: color .2s; }
.platform-strip a:hover { color: var(--white); }

/* Stats */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 40px 32px; }
.stat { display: flex; flex-direction: column; gap: 8px; padding-top: 20px; border-top: 1px solid var(--line-dark); }
.light .stat, .soft .stat { border-top-color: var(--grey-200); }
.stat-num { font-family: var(--font-head); font-size: clamp(40px, 4.6vw, 60px); font-weight: 600; letter-spacing: -.03em; line-height: 1; }
.stat-label { font-size: 15px; color: var(--grey-400); }
.light .stat-label, .soft .stat-label { color: var(--grey-600); }

/* Cards */
.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 420px), 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr)); }
.card {
  position: relative; display: flex; flex-direction: column; gap: 14px; padding: 30px;
  background: var(--surface); border: 1px solid var(--line-dark); border-radius: var(--radius);
  text-decoration: none; color: inherit; transition: border-color .2s, transform .25s var(--ease), background .2s;
}
a.card:hover { border-color: var(--grey-500); transform: translateY(-3px); }
.light .card { background: var(--white); border-color: var(--grey-200); }
.soft .card { background: var(--white); border-color: var(--grey-200); }
.light a.card:hover, .soft a.card:hover { border-color: var(--black); }
.card .card-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.card .tag { font-size: 13px; color: var(--grey-400); }
.light .card .tag, .soft .card .tag { color: var(--grey-600); }
.card p { color: var(--grey-400); font-size: 15px; }
.light .card p, .soft .card p { color: var(--grey-600); }
.card .card-foot { margin-top: auto; padding-top: 8px; font-size: 14px; font-weight: 500; display: inline-flex; align-items: center; gap: 8px; }
.card .card-foot svg { width: 15px; height: 15px; transition: transform .2s var(--ease); }
a.card:hover .card-foot svg { transform: translateX(4px); }
.mono {
  width: 46px; height: 46px; border-radius: 12px; border: 1px solid var(--grey-700);
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-head); font-size: 19px; font-weight: 600; flex: none;
}
.light .mono, .soft .mono { border-color: var(--grey-300); }
.num { font-family: var(--font-head); font-size: 14px; color: var(--grey-500); }

/* Feature split */
.split { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 380px), 1fr)); gap: clamp(40px, 6vw, 88px); align-items: start; }
.split.center { align-items: center; }
.list-rows > * { padding-block: 24px; border-bottom: 1px solid var(--line-dark); display: flex; flex-direction: column; gap: 6px; }
.list-rows > *:first-child { padding-top: 0; }
.list-rows > *:last-child { border-bottom: 0; }
.light .list-rows > *, .soft .list-rows > * { border-bottom-color: var(--grey-200); }
.list-rows h3 { font-family: var(--font-body); font-size: 18px; font-weight: 600; line-height: 1.4; }
.list-rows p { color: var(--grey-400); font-size: 15px; }
.light .list-rows p, .soft .list-rows p { color: var(--grey-600); }

/* Tabs */
.tabs { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: clamp(32px, 5vw, 72px); align-items: start; }
.tab-list { display: flex; flex-direction: column; border-top: 1px solid var(--grey-200); }
.tab {
  display: flex; align-items: center; justify-content: space-between; gap: 16px; width: 100%;
  min-height: 64px; padding: 0 4px; background: none; border: 0; border-bottom: 1px solid var(--grey-200);
  text-align: left; cursor: pointer; font-family: var(--font-head); font-size: clamp(20px, 2vw, 26px); font-weight: 600; color: var(--grey-500);
  transition: color .2s;
}
.tab .num { font-size: 13px; }
.tab:hover, .tab[aria-selected="true"] { color: var(--black); }
.tab-panel { background: var(--black); color: var(--white); border-radius: 20px; padding: clamp(28px, 4vw, 48px); display: flex; flex-direction: column; gap: 22px; min-height: 100%; }
.tab-panel[hidden] { display: none; }
.tab-panel .lead { max-width: none; }
.tab-panel .pill-row { display: flex; flex-wrap: wrap; gap: 10px; }
.pill { display: inline-flex; align-items: center; gap: 10px; min-height: 44px; padding: 0 18px; border-radius: 999px; border: 1px solid var(--grey-700); text-decoration: none; font-weight: 500; }
.pill:hover { border-color: var(--white); }
.light .pill, .soft .pill { border-color: var(--grey-300); }
.light .pill:hover, .soft .pill:hover { border-color: var(--black); }
.tab-panel .stat-num { font-size: clamp(44px, 5vw, 68px); }
@media (max-width: 860px) { .tabs { grid-template-columns: 1fr; } }

/* Product detail */
.subnav { position: sticky; top: var(--header-h); z-index: 20; background: rgba(0, 0, 0, .9); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid var(--line-dark); }
.subnav ul { display: flex; gap: 6px; overflow-x: auto; padding-block: 12px; scrollbar-width: none; }
.subnav ul::-webkit-scrollbar { display: none; }
.subnav a { display: inline-flex; align-items: center; min-height: 40px; padding: 0 16px; border-radius: 999px; border: 1px solid var(--line-dark); text-decoration: none; font-size: 14px; white-space: nowrap; color: var(--grey-300); }
.subnav a:hover { border-color: var(--white); color: var(--white); }
.group-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 28px; }
.product { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 340px), 1fr)); gap: clamp(28px, 4vw, 56px); padding: clamp(28px, 4vw, 44px); border: 1px solid var(--line-dark); border-radius: 20px; background: var(--surface); }
.product + .product { margin-top: 16px; }
.product-intro { display: flex; flex-direction: column; gap: 16px; align-items: flex-start; }
.product-facts { display: flex; flex-direction: column; }
.product-facts li { padding-block: 16px; border-bottom: 1px solid var(--line-dark); font-size: 15px; display: flex; gap: 14px; }
.product-facts li:first-child { padding-top: 0; }
.product-facts li::before { content: ""; flex: none; width: 6px; height: 6px; border-radius: 50%; background: var(--white); margin-top: 9px; }
.product-facts li.pricing { border-bottom: 0; color: var(--grey-400); }
.product-facts li.pricing::before { background: var(--grey-500); }

/* Tables */
.table-wrap { overflow-x: auto; border: 1px solid var(--grey-200); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; font-size: 15px; min-width: 720px; }
th, td { text-align: left; padding: 16px 20px; border-bottom: 1px solid var(--grey-200); vertical-align: top; }
th { font-size: 13px; font-weight: 500; letter-spacing: .08em; text-transform: uppercase; color: var(--grey-600); background: var(--grey-100); }
tr:last-child td { border-bottom: 0; }
td a { font-weight: 500; }

/* CTA band */
.cta-band { text-align: center; }
.cta-band .container { display: flex; flex-direction: column; align-items: center; gap: 24px; }
.cta-band .lead { margin-inline: auto; }

/* Forms */
.form { display: flex; flex-direction: column; gap: 20px; padding: clamp(24px, 4vw, 40px); background: var(--surface); border: 1px solid var(--line-dark); border-radius: 20px; }
.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); gap: 16px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field label { font-size: 14px; color: var(--grey-300); }
.field input, .field select, .field textarea {
  width: 100%; min-height: 48px; padding: 12px 14px; border-radius: 10px;
  background: var(--black); color: var(--white); border: 1px solid var(--grey-700); font: inherit; font-size: 15px;
}
.field textarea { min-height: 140px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid var(--white); outline-offset: 1px; border-color: var(--white); }
.check { display: flex; gap: 12px; align-items: flex-start; font-size: 14px; color: var(--grey-400); }
.check input { width: 20px; height: 20px; margin-top: 2px; accent-color: var(--white); flex: none; }
.check a { color: var(--white); }
.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.form-status { font-size: 15px; padding: 14px 16px; border-radius: 10px; border: 1px solid var(--grey-700); }
.form-status[hidden] { display: none; }
.contact-list > div { display: flex; justify-content: space-between; gap: 16px; padding-block: 14px; border-bottom: 1px solid var(--line-dark); font-size: 15px; flex-wrap: wrap; }
.contact-list a { color: var(--grey-300); }

/* Prose (legal) */
.prose { max-width: 760px; }
.prose h2 { font-size: 26px; letter-spacing: -.01em; margin: 48px 0 14px; }
.prose h3 { font-family: var(--font-body); font-size: 18px; margin: 28px 0 10px; }
.prose p, .prose li { color: var(--grey-600); font-size: 16px; line-height: 1.75; }
.prose p + p { margin-top: 14px; }
.prose ul { list-style: disc; padding-left: 22px; margin: 12px 0; }
.prose li + li { margin-top: 6px; }
.prose a { color: var(--black); font-weight: 500; }
.notice { padding: 16px 18px; border: 1px solid var(--grey-200); border-radius: 12px; background: var(--grey-100); font-size: 15px; color: var(--grey-600); }

/* Big region list */
.regions { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); gap: 0; border-top: 1px solid var(--line-dark); }
.regions li { padding: 28px 0; border-bottom: 1px solid var(--line-dark); font-family: var(--font-head); font-size: clamp(30px, 3.6vw, 48px); font-weight: 600; letter-spacing: -.02em; }

/* Helix art (about) */
.helix-art { display: flex; justify-content: center; gap: 22px; padding: 24px; }
.helix-art span { display: block; width: 48px; height: 240px; border-radius: 26px; background: var(--black); }
.helix-art span + span { background: var(--grey-400); margin-top: 56px; }

/* Person card */
.avatar { width: 72px; height: 72px; border-radius: 50%; background: var(--surface-2); border: 1px solid var(--grey-700); }

/* Empty state */
.empty { border: 1px dashed var(--grey-700); border-radius: 20px; padding: clamp(32px, 5vw, 56px); display: flex; flex-direction: column; gap: 14px; align-items: flex-start; }
.light .empty { border-color: var(--grey-300); }

/* Swatches */
.swatches { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; }
.swatch { border: 1px solid var(--grey-200); border-radius: 12px; overflow: hidden; font-size: 14px; }
.swatch span { display: block; height: 80px; }
.swatch div { padding: 10px 12px; }

/* Footer */
.site-footer { border-top: 1px solid var(--line-dark); padding-block: 72px 40px; }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, 1fr)); gap: 40px; }
.footer-brand { display: flex; flex-direction: column; gap: 16px; max-width: 340px; }
.footer-brand p { color: var(--grey-400); font-size: 15px; }
.footer-col h2 { font-family: var(--font-body); font-size: 13px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 16px; }
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col a { color: var(--grey-400); text-decoration: none; font-size: 15px; }
.footer-col a:hover { color: var(--white); }
.footer-bottom { margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--line-dark); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; font-size: 14px; color: var(--grey-400); }
.footer-bottom nav { display: flex; flex-wrap: wrap; gap: 20px; }
.footer-bottom a { color: var(--grey-400); text-decoration: none; }
.footer-bottom a:hover { color: var(--white); }
.social { display: flex; gap: 10px; }
.social a { width: 40px; height: 40px; border: 1px solid var(--grey-700); border-radius: 10px; display: inline-flex; align-items: center; justify-content: center; color: var(--grey-300); }
.social a:hover { border-color: var(--white); color: var(--white); }
.social svg { width: 18px; height: 18px; }
@media (max-width: 900px) { .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } .footer-brand { grid-column: 1 / -1; } }
@media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; } }

/* Reveal on scroll (only when JS is running and motion is allowed) */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.js .reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
  .js .reveal { opacity: 1; transform: none; }
}

/* Fact lists on light backgrounds */
.light .product-facts li, .soft .product-facts li { border-bottom-color: var(--grey-200); }
.light .product-facts li::before, .soft .product-facts li::before { background: var(--black); }
.light .product-facts li:last-child, .soft .product-facts li:last-child { border-bottom: 0; }

/* Tab panel sits on black inside a light section */
.tab-panel .lead { color: var(--grey-300); }
.tab-panel .muted, .tab-panel .eyebrow { color: var(--grey-400); }
.tab-panel .pill { border-color: var(--grey-700); color: var(--white); }
.tab-panel .pill:hover { border-color: var(--white); }
.stats-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 760px) { .stats-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

/* =====================================================================
   Living AI layer: neural background, glass, glow, motion
   ===================================================================== */
#ai-bg { position: fixed; inset: 0; z-index: 0; pointer-events: none; display: block;
  -webkit-mask-image: radial-gradient(ellipse 85% 75% at 50% 40%, #000 35%, transparent 100%);
          mask-image: radial-gradient(ellipse 85% 75% at 50% 40%, #000 35%, transparent 100%); }
/* Soft monochrome light that drifts slowly behind the grid */
.ai-veil { position: fixed; inset: -20%; z-index: 0; pointer-events: none; filter: blur(80px); opacity: .9; }
.ai-veil::before, .ai-veil::after { content: ""; position: absolute; border-radius: 50%; }
.ai-veil::before { width: 60vw; height: 60vw; left: 10%; top: 0%; background: radial-gradient(circle, rgba(255,255,255,.07), transparent 65%); animation: drift-a 38s ease-in-out infinite alternate; }
.ai-veil::after { width: 50vw; height: 50vw; right: 5%; top: 35%; background: radial-gradient(circle, rgba(161,161,170,.08), transparent 65%); animation: drift-b 46s ease-in-out infinite alternate; }
@keyframes drift-a { to { transform: translate(18vw, 14vh) scale(1.15); } }
@keyframes drift-b { to { transform: translate(-20vw, -12vh) scale(.9); } }
.ai-grid { display: none; }
.utility, .site-header, main, .site-footer { position: relative; z-index: 1; }
.site-header { z-index: 50; background: rgba(0, 0, 0, .55); }
.utility { background: rgba(0, 0, 0, .4); }
.dark { background: transparent; }
.site-footer { background: rgba(0, 0, 0, .6); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); }

/* Glass cards with a cursor spotlight */
.dark .card, .dark .product, .dark .form {
  background: rgba(10, 10, 12, .55);
  backdrop-filter: blur(10px) saturate(140%); -webkit-backdrop-filter: blur(10px) saturate(140%);
}
.card, .product { overflow: hidden; isolation: isolate; }
.card::before, .product::before {
  content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none; opacity: 0; transition: opacity .3s;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 50%), rgba(255,255,255,.10), transparent 45%);
}
.light .card::before, .soft .card::before { background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 50%), rgba(0,0,0,.05), transparent 45%); }
.card:hover::before, .product:hover::before { opacity: 1; }
.dark .card { box-shadow: inset 0 1px 0 rgba(255,255,255,.04); }

/* Live status chip */
.live-chip { display: inline-flex; align-items: center; gap: 10px; align-self: flex-start; padding: 7px 14px 7px 12px; border: 1px solid var(--line-dark); border-radius: 999px; font-size: 13px; color: var(--grey-300); background: rgba(10,10,12,.6); backdrop-filter: blur(8px); }
.live-dot { position: relative; width: 8px; height: 8px; border-radius: 50%; background: var(--white); }
.live-dot::after { content: ""; position: absolute; inset: -4px; border-radius: 50%; border: 1px solid var(--white); animation: ping 2s cubic-bezier(0,0,.2,1) infinite; }
@keyframes ping { 0% { transform: scale(.6); opacity: .9; } 80%, 100% { transform: scale(2); opacity: 0; } }

/* Hero headline: words rise in, "big moves" shimmers */
.display .w { display: inline-block; opacity: 0; transform: translateY(.35em); animation: rise .9s var(--ease) forwards; animation-delay: calc(var(--i) * 90ms + 150ms); }
@keyframes rise { to { opacity: 1; transform: none; } }
.shine { background: linear-gradient(100deg, #fff 0%, #fff 44%, #A1A1AA 50%, #fff 56%, #fff 100%); background-size: 250% 100%; -webkit-background-clip: text; background-clip: text; color: transparent; animation: rise .9s var(--ease) forwards, shine 9s linear 2s infinite; }
@keyframes shine { from { background-position: 100% 0; } to { background-position: -150% 0; } }

/* 3D helix canvas */
.helix-canvas { width: 100%; height: clamp(420px, 46vw, 580px); display: block; }

/* Marquee of platforms */
.marquee { overflow: hidden; -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent); mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent); }
.marquee-track { display: flex; width: max-content; animation: marquee 38s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee ul { display: flex; gap: 72px; padding: 28px 36px; flex-wrap: nowrap; justify-content: flex-start; }
.marquee li { display: flex; align-items: center; gap: 72px; }
.marquee li::after { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--grey-700); }
@keyframes marquee { to { transform: translateX(-50%); } }

/* Pipeline: how an answer is made */
.pipeline { position: relative; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 20px; --cycle: 6s; }
.pipeline::before { content: ""; position: absolute; left: 10%; right: 10%; top: 31px; height: 1px; background: linear-gradient(90deg, transparent, var(--grey-700) 8%, var(--grey-700) 92%, transparent); }
.pipe-pulse { position: absolute; top: 28px; left: 10%; width: 80px; height: 7px; margin-left: -40px; border-radius: 999px; background: radial-gradient(closest-side, #fff, rgba(255,255,255,.35) 50%, transparent); filter: blur(.4px); animation: pulse-run var(--cycle) cubic-bezier(.6,0,.4,1) infinite; }
@keyframes pulse-run { 0% { left: 10%; opacity: 0; } 6% { opacity: 1; } 88% { opacity: 1; } 96%, 100% { left: 90%; opacity: 0; } }
.pipe-step { position: relative; display: flex; flex-direction: column; align-items: center; text-align: center; gap: 14px; }
.pipe-node { width: 62px; height: 62px; border-radius: 50%; border: 1px solid var(--grey-700); background: rgba(10,10,12,.85); display: flex; align-items: center; justify-content: center; font-family: var(--font-head); font-weight: 600; font-size: 15px; color: var(--grey-400); animation: node-lit var(--cycle) linear infinite; animation-delay: calc(var(--i) * var(--cycle) * .2 - var(--cycle) * .02); }
@keyframes node-lit { 0%, 14%, 100% { border-color: var(--grey-700); color: var(--grey-400); box-shadow: none; } 3%, 9% { border-color: #fff; color: #fff; box-shadow: 0 0 0 6px rgba(255,255,255,.06), 0 0 32px rgba(255,255,255,.35); } }
.pipe-step h3 { font-family: var(--font-head); font-size: 20px; }
.pipe-step p { font-size: 14px; color: var(--grey-400); max-width: 22ch; }
@media (max-width: 900px) {
  .pipeline { grid-template-columns: 1fr; gap: 28px; }
  .pipeline::before { left: 31px; right: auto; top: 31px; bottom: 31px; width: 1px; height: auto; background: var(--grey-700); }
  .pipe-pulse { display: none; }
  .pipe-step { flex-direction: row; align-items: flex-start; text-align: left; gap: 20px; }
  .pipe-step > div { display: flex; flex-direction: column; gap: 6px; padding-top: 6px; }
  .pipe-node { flex: none; }
}
@media (min-width: 901px) { .pipe-step > div { display: flex; flex-direction: column; gap: 8px; align-items: center; } }

/* Big outlined word for CTAs */
.outline-word { font-family: var(--font-head); font-weight: 700; font-size: clamp(64px, 14vw, 200px); line-height: .9; letter-spacing: -.05em; color: transparent; -webkit-text-stroke: 1px rgba(255,255,255,.38); user-select: none; }

@media (prefers-reduced-motion: reduce) {
  .display .w, .shine { opacity: 1; transform: none; animation: none; color: #fff; background: none; }
  .marquee-track, .pipe-pulse, .pipe-node, .live-dot::after, .ai-grid { animation: none; }
}
.product { position: relative; }

.tab-panel { background: #000; box-shadow: 0 30px 80px rgba(0,0,0,.18); }
.hero-copy, .page-hero .container, .section-head { text-shadow: 0 1px 18px rgba(0,0,0,.9), 0 0 2px rgba(0,0,0,.6); }
.light .section-head, .soft .section-head { text-shadow: none; }
.badge { display: inline-flex; align-items: center; vertical-align: middle; margin-left: 8px; padding: 3px 9px; border-radius: 999px; border: 1px solid var(--grey-500); font-family: var(--font-body); font-size: 11px; font-weight: 500; letter-spacing: .04em; text-transform: uppercase; color: var(--grey-300); white-space: nowrap; }
.light .badge, .soft .badge { border-color: var(--grey-400); color: var(--grey-600); }
.mega-grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
@media (max-width: 1080px) { .mega-grid { grid-template-columns: 1fr; } }

/* Build stage tracker */
.stage-list { display: flex; flex-direction: column; border-top: 1px solid var(--line-dark); }
.stage-row { display: grid; grid-template-columns: minmax(220px, .8fr) minmax(0, 2fr); gap: 24px; align-items: center; padding: 22px 0; border-bottom: 1px solid var(--line-dark); }
.stage-name { display: flex; align-items: center; gap: 14px; }
.stage-name h3 { font-family: var(--font-head); font-size: 20px; }
.stage-name .mono { width: 40px; height: 40px; font-size: 16px; }
.stage-track { position: relative; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); }
.stage-track::before { content: ""; position: absolute; left: 7px; right: calc(33.33% - 7px); top: 7px; height: 2px; background: var(--grey-700); }
.stage-track::after { content: ""; position: absolute; left: 7px; top: 7px; height: 2px; width: calc((100% - 33.33%) * var(--p)); background: linear-gradient(90deg, var(--grey-400), #fff); transform-origin: left; transform: scaleX(0); transition: transform 1.2s var(--ease) .2s; }
.reveal.in .stage-track::after, html:not(.js) .stage-track::after { transform: scaleX(1); }
.stage-step { position: relative; z-index: 1; display: flex; flex-direction: column; gap: 10px; }
.stage-dot { width: 16px; height: 16px; border-radius: 50%; background: var(--black); border: 2px solid var(--grey-700); }
.stage-step.on .stage-dot { border-color: #fff; background: #fff; }
.stage-step.now .stage-dot { box-shadow: 0 0 0 6px rgba(255,255,255,.08), 0 0 24px rgba(255,255,255,.5); animation: now-glow 2.4s ease-in-out infinite; }
@keyframes now-glow { 50% { box-shadow: 0 0 0 10px rgba(255,255,255,.04), 0 0 36px rgba(255,255,255,.7); } }
.stage-label { font-size: 13px; color: var(--grey-500); }
.stage-step.on .stage-label { color: var(--grey-300); }
.stage-step.now .stage-label { color: #fff; font-weight: 500; }
@media (max-width: 760px) { .stage-row { grid-template-columns: 1fr; } .stage-label { font-size: 11px; } }

/* Build file */
.bf-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; padding: 8px 0; border-top: 1px solid var(--line-dark); padding-top: 18px; }
.bf-num { display: flex; flex-direction: column; gap: 6px; }
.bf-num .stat-label { font-size: 13px; line-height: 1.45; }
@media (max-width: 520px) { .bf-grid { grid-template-columns: 1fr; } }

/* Capability matrix */
.matrix th[scope="row"] { font-weight: 600; white-space: nowrap; text-transform: none; letter-spacing: 0; font-size: 15px; color: var(--black); background: var(--white); }
.matrix td.cap { text-align: center; }
.matrix thead th:not(:first-child) { text-align: center; }
.tick { font-size: 14px; color: var(--black); }
.dash { color: var(--grey-300); }
.pill svg { width: 15px; height: 15px; flex: none; } .pill { white-space: nowrap; }
.table-wrap { position: relative; }
.hero-copy .btn, .page-hero .btn, .section-head .btn { text-shadow: none; }