/* =========================================================
   Lumii AI — Enterprise Agentic AI
   Shared design system. Light, warm-neutral, editorial.
   ========================================================= */

/* ---------- Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;600;700&family=IBM+Plex+Mono:wght@400;500&display=swap');

/* ---------- Tokens ---------- */
:root{
  --paper:      #FFFFFF;   /* clean white background */
  --paper-2:    #F5F5F6;   /* elevated surface / inputs / placeholders */
  --paper-3:    #F2F2F3;   /* recessed / alt band */
  --ink:        #0D0D0F;   /* near-black, neutral */
  --ink-2:      #525257;   /* secondary text */
  --ink-3:      #8C8C93;   /* muted text / labels */
  --line:       #E7E7EA;   /* hairline */
  --line-2:     #D6D6DB;   /* stronger hairline */
  --ink-press:  #000000;
  --nav-h:      72px;
  --accent:     #E1623C;   /* restrained warm accent, used sparingly */

  /* Apple-style system stack: PingFang/SF on Apple, Noto Sans SC fallback */
  --sans:  "PingFang SC", -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", "Noto Sans SC", Helvetica, Arial, sans-serif;
  --serif: var(--sans);
  --mono:  "IBM Plex Mono", "SFMono-Regular", "SF Mono", Menlo, monospace;

  --container: 1240px;
  --gutter: clamp(20px, 5vw, 80px);
  --sect: clamp(88px, 12vw, 168px);

  --r-sm: 4px;
  --r-md: 8px;
  --r-lg: 14px;

  --ease: cubic-bezier(.22,.61,.36,1);
}

/* ---------- Reset ---------- */
*{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-weight:400;
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
button{ font-family:inherit; cursor:pointer; }
::selection{ background:var(--ink); color:var(--paper); }

/* ---------- Layout ---------- */
.wrap{ max-width:var(--container); margin:0 auto; padding-inline:var(--gutter); }
.wrap-wide{ max-width:1480px; margin:0 auto; padding-inline:var(--gutter); }
section{ position:relative; }
.band{ background:var(--paper-3); }
.divider{ border:0; border-top:1px solid var(--line); margin:0; }

/* ---------- Type utilities ---------- */
.eyebrow{
  font-family:var(--mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--ink-3);
  display:inline-flex;
  align-items:center;
  gap:.6em;
}
.eyebrow::before{
  content:"";
  width:24px; height:1px; background:var(--line-2);
  display:inline-block;
}
.eyebrow.no-rule::before{ display:none; }

h1,h2,h3,h4{ margin:0; font-weight:600; }
.display{
  font-family:var(--sans);
  font-weight:600;
  line-height:1.06;
  letter-spacing:-.025em;
  text-wrap:balance;
}
.h1{ font-size:clamp(38px, 5vw, 72px); }
.h2{ font-size:clamp(27px, 3.2vw, 44px); line-height:1.1; }
.h3{ font-size:clamp(20px, 2vw, 26px); line-height:1.22; }
.lead{
  font-size:clamp(16px, 1.35vw, 19px);
  line-height:1.6;
  color:var(--ink-2);
  font-weight:400;
  text-wrap:pretty;
  max-width:36em;
}
.muted{ color:var(--ink-3); }
.soft{ color:var(--ink-2); }

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:.6em;
  font-family:var(--sans); font-size:15px; font-weight:500;
  padding:14px 24px; border-radius:var(--r-md);
  border:1px solid var(--ink);
  transition:background .25s var(--ease), color .25s var(--ease), transform .25s var(--ease), border-color .25s var(--ease);
  white-space:nowrap;
}
.btn .arr{ transition:transform .3s var(--ease); }
.btn:hover .arr{ transform:translateX(4px); }
.btn-solid{ background:var(--ink); color:var(--paper); }
.btn-solid:hover{ background:#000; transform:translateY(-1px); }
.btn-ghost{ background:transparent; color:var(--ink); border-color:var(--line-2); }
.btn-ghost:hover{ border-color:var(--ink); background:rgba(13,13,15,.03); }
.btn-lg{ padding:17px 30px; font-size:16px; }
.link-arrow{
  display:inline-flex; align-items:center; gap:.5em;
  font-weight:500; color:var(--ink);
  border-bottom:1px solid transparent;
  transition:gap .25s var(--ease);
}
.link-arrow:hover{ gap:.85em; }
.link-arrow .arr{ transition:transform .3s var(--ease); }
.link-arrow:hover .arr{ transform:translateX(3px); }

/* ---------- On-dark context (hero video) ---------- */
.on-dark{ color:#fff; }
.on-dark .lead{ color:rgba(255,255,255,.80); }
.on-dark .btn-solid{ background:#fff; color:var(--ink); border-color:#fff; }
.on-dark .btn-solid:hover{ background:#ededed; }
.on-dark .btn-ghost{ background:transparent; color:#fff; border-color:rgba(255,255,255,.42); }
.on-dark .btn-ghost:hover{ border-color:#fff; background:rgba(255,255,255,.1); }

/* ===========================================================
   NAVBAR
   =========================================================== */
.nav{
  position:sticky; top:0; z-index:80;
  background-color:color-mix(in srgb, var(--paper) 86%, transparent);
  backdrop-filter:saturate(140%) blur(14px);
  border-bottom:1px solid transparent;
  transition:border-color .3s var(--ease), background-color .3s var(--ease);
}
.nav.scrolled{ border-bottom-color:var(--line); }

/* nav overlaying a dark hero video (homepage) */
.nav-over-dark{ background-color:transparent; }
.nav-over-dark .nav-link{ color:rgba(255,255,255,.80); }
.nav-over-dark .nav-link:hover{ color:#fff; background:rgba(255,255,255,.12); }
.nav-over-dark .brand .word{ color:#fff; }
.nav-over-dark .brand .word .ai{ color:rgba(255,255,255,.6); }
.nav-over-dark .brand .mark{ filter:none; }
.nav-over-dark .nav-cta .ghostlink{ color:rgba(255,255,255,.80); }
.nav-over-dark .nav-cta .ghostlink:hover{ color:#fff; }
.nav-over-dark .nav-cta .btn-solid{ background:#fff; color:var(--ink); border-color:#fff; }
.nav-over-dark .nav-cta .btn-solid:hover{ background:#ededed; }
.nav-over-dark .nav-toggle{ border-color:rgba(255,255,255,.4); }
.nav-over-dark .nav-toggle span,
.nav-over-dark .nav-toggle span::before,
.nav-over-dark .nav-toggle span::after{ background:#fff; }
/* once scrolled, revert to the solid light nav */
.nav-over-dark.scrolled{ background-color:color-mix(in srgb, var(--paper) 88%, transparent); }
.nav-over-dark.scrolled .nav-link{ color:var(--ink-2); }
.nav-over-dark.scrolled .nav-link:hover{ color:var(--ink); background:rgba(13,13,15,.04); }
.nav-over-dark.scrolled .brand .word{ color:var(--ink); }
.nav-over-dark.scrolled .brand .word .ai{ color:var(--ink-3); }
.nav-over-dark.scrolled .brand .mark{ filter:none; }
.nav-over-dark.scrolled .nav-cta .ghostlink{ color:var(--ink-2); }
.nav-over-dark.scrolled .nav-cta .btn-solid{ background:var(--ink); color:#fff; border-color:var(--ink); }
.nav-over-dark.scrolled .nav-toggle{ border-color:var(--line-2); }
.nav-over-dark.scrolled .nav-toggle span,
.nav-over-dark.scrolled .nav-toggle span::before,
.nav-over-dark.scrolled .nav-toggle span::after{ background:var(--ink); }
.nav-inner{
  max-width:1480px; margin:0 auto; padding:0 var(--gutter);
  height:72px; display:flex; align-items:center; gap:40px;
}
.brand{ display:flex; align-items:center; gap:11px; flex-shrink:0; }
.brand .mark{ width:26px; height:26px; flex-shrink:0; }
.brand .word{ font-weight:700; font-size:19px; letter-spacing:-.02em; }
.brand .word .ai{ color:var(--ink-3); font-weight:500; margin-left:.18em; }

.nav-menu{ display:flex; align-items:center; gap:6px; margin-left:8px; }
.nav-item{ position:relative; }
.nav-link{
  display:inline-flex; align-items:center; gap:6px;
  padding:9px 14px; border-radius:var(--r-sm);
  font-size:15px; font-weight:500; color:var(--ink-2);
  transition:color .2s var(--ease), background .2s var(--ease);
}
.nav-link:hover{ color:var(--ink); background:rgba(13,13,15,.04); }
.nav-link .chev{ width:9px; height:9px; opacity:.6; transition:transform .25s var(--ease); }
.nav-item.open .nav-link .chev{ transform:rotate(180deg); }

.nav-spacer{ flex:1; }
.nav-cta{ display:flex; align-items:center; gap:18px; }
.nav-cta .ghostlink{ font-size:15px; font-weight:500; color:var(--ink-2); transition:color .2s; }
.nav-cta .ghostlink:hover{ color:var(--ink); }
.nav-login{ font-size:15px; font-weight:500; color:var(--text-2); transition:color .2s var(--ease); white-space:nowrap; }
.nav-login:hover{ color:var(--text-1); }
/* dark hero variant */
.nav-over-dark .nav-login{ color:rgba(255,255,255,.8); }
.nav-over-dark .nav-login:hover{ color:#fff; }
.nav-over-dark.scrolled .nav-login{ color:var(--text-2); }
.nav-over-dark.scrolled .nav-login:hover{ color:var(--text-1); }
/* white dropdown-open state */
.nav.dd-open .nav-login{ color:var(--text-2); }
.nav.dd-open .nav-login:hover{ color:var(--text-1); }

/* mega-menu drawer — full-width, flush to the bar (Wonderful-style) */
.nav-item.has-dd{ position:static; }
.dropdown{
  position:absolute; top:100%; left:0; right:0;
  width:auto;
  background:#fff;
  border:0;
  border-bottom:1px solid var(--line);
  border-radius:0;
  box-shadow:0 30px 38px -28px rgba(0,0,0,.22);
  padding:0;
  opacity:0; visibility:hidden; pointer-events:none;
  transform:translateY(-12px);
  transition:opacity .26s var(--ease), transform .32s var(--ease), visibility .26s;
}
.nav-item.open .dropdown{ opacity:1; visibility:visible; pointer-events:auto; transform:translateY(0); }

.dd-inner{
  max-width:1480px; margin:0 auto;
  padding:clamp(34px,3.6vw,52px) var(--gutter) clamp(40px,4.4vw,58px);
  display:grid; grid-template-columns:minmax(0,1fr) minmax(240px,330px);
  gap:clamp(40px,6vw,110px); align-items:start;
}
.dd-label{ display:block; font-size:14px; color:var(--ink-3); margin-bottom:clamp(22px,2.2vw,30px); }
.dd-grid{ display:grid; grid-template-columns:1fr 1fr; gap:clamp(26px,2.8vw,40px) clamp(40px,5vw,90px); max-width:640px; }

/* nav becomes one continuous white surface with the drawer when open */
.nav.dd-open{
  background-color:#fff !important;
  backdrop-filter:none;
  border-bottom-color:transparent;
}
.nav.dd-open .brand .word{ color:var(--ink); }
.nav.dd-open .brand .word .ai{ color:var(--ink-3); }
.nav.dd-open .nav-link{ color:var(--ink-2); }
.nav.dd-open .nav-link:hover{ color:var(--ink); }
.nav.dd-open .btn-solid{ background:var(--ink); color:#fff; border-color:var(--ink); }

.dd-cell{
  display:flex; flex-direction:column; gap:6px;
  text-decoration:none; color:inherit; padding:0;
}
.dd-cell h4{
  font-size:17px; font-weight:600; color:var(--ink); margin:0;
  transition:color .2s var(--ease);
}
.dd-cell p{ font-size:13.5px; color:var(--ink-3); margin:0; line-height:1.5; }
.dd-cell:hover h4{ color:var(--accent); }

/* right-hand feature panel */
.dd-feature{ display:flex; flex-direction:column; gap:14px; text-decoration:none; color:inherit; }
.dd-feature-label{ font-size:13px; color:var(--ink-3); }
.dd-feature-img{ display:block; border-radius:var(--r-md); overflow:hidden; border:1px solid var(--line); aspect-ratio:16/10; max-height:220px; }
.dd-feature-img img{ width:100%; height:100%; object-fit:cover; display:block; transition:transform .55s var(--ease); }
.dd-feature:hover .dd-feature-img img{ transform:scale(1.04); }
.dd-feature-title{ font-size:15px; font-weight:500; color:var(--ink); line-height:1.45; }
.dd-feature-text{ border-left:1px solid var(--line); padding-left:clamp(28px,3vw,40px); gap:12px; }
.dd-feature-cta{ font-size:14px; font-weight:500; color:var(--accent); margin-top:2px; }
@media (max-width:860px){
  .dd-inner{ grid-template-columns:1fr; gap:30px; }
  .dd-feature{ flex-direction:row; align-items:center; gap:18px; flex-wrap:wrap; }
  .dd-feature-img{ width:200px; flex:0 0 200px; }
  .dd-feature-text{ border-left:0; padding-left:0; border-top:1px solid var(--line); padding-top:26px; flex-direction:column; align-items:flex-start; }
}

/* mobile nav */
.nav-toggle{ display:none; width:42px; height:42px; border:1px solid var(--line-2); border-radius:var(--r-md); background:transparent; align-items:center; justify-content:center; }
.nav-toggle span{ display:block; width:18px; height:1.5px; background:var(--ink); position:relative; }
.nav-toggle span::before,.nav-toggle span::after{ content:""; position:absolute; left:0; width:18px; height:1.5px; background:var(--ink); transition:transform .25s var(--ease); }
.nav-toggle span::before{ top:-5px; } .nav-toggle span::after{ top:5px; }
.mobile-menu{ display:none; }

/* ===========================================================
   HERO  (full-bleed video background)
   =========================================================== */
.hero{
  position:relative; overflow:hidden;
  margin-top:calc(var(--nav-h) * -1);
  min-height:clamp(640px, 94vh, 960px);
  display:flex; align-items:flex-end;
  padding:calc(var(--nav-h) + 48px) 0 clamp(52px,8vh,104px);
}
.hero-bg{
  position:absolute; inset:0; z-index:0;
  background-color:#0B0B0D;
  background-image:
    radial-gradient(130% 90% at 75% 0%, rgba(255,255,255,.07), transparent 58%),
    repeating-linear-gradient(135deg, transparent, transparent 13px, rgba(255,255,255,.02) 13px, rgba(255,255,255,.02) 14px);
}
.hero-video{ position:absolute; inset:0; width:100%; height:100%; object-fit:cover; display:block; }
.hero-scrim{ position:absolute; inset:0; z-index:1; background:linear-gradient(180deg, rgba(11,11,13,.42) 0%, rgba(11,11,13,.18) 38%, rgba(11,11,13,.66) 100%); }
.hero-ph-tag{
  position:absolute; z-index:1; right:clamp(16px,3vw,32px); bottom:clamp(16px,3vw,28px);
  font-family:var(--mono); font-size:11px; letter-spacing:.08em; color:rgba(255,255,255,.5);
  border:1px solid rgba(255,255,255,.2); padding:7px 13px; border-radius:999px; pointer-events:none;
}
.hero-inner{ position:relative; z-index:2; max-width:720px; margin-left:0; margin-right:auto; }
/* keep the headline on one line only where it actually fits */
@media (min-width:768px){
  .hero-inner .h1{ white-space:nowrap; }
}
.badge{
  display:inline-flex; align-items:center; gap:9px;
  font-family:var(--mono); font-size:12px; font-weight:500;
  letter-spacing:.12em; text-transform:uppercase; color:var(--ink-2);
  padding:7px 14px 7px 11px; border:1px solid var(--line-2); border-radius:999px;
  background:var(--paper-2); white-space:nowrap;
}
.badge .dot{ width:6px; height:6px; border-radius:50%; background:var(--ink); }
.on-dark .badge{ background:rgba(255,255,255,.08); border-color:rgba(255,255,255,.28); color:rgba(255,255,255,.92); }
.on-dark .badge .dot{ background:#fff; }
.hero h1{ margin-top:30px; }
.hero .lead{ margin-top:28px; max-width:30em; }
.hero-cta{ display:flex; flex-wrap:wrap; gap:14px; margin-top:40px; }

/* striped placeholder */
.ph{
  position:relative; background:var(--paper-2);
  border:1px solid var(--line);
  background-image:repeating-linear-gradient(135deg, transparent, transparent 9px, rgba(20,20,26,.06) 9px, rgba(20,20,26,.06) 10px);
  display:flex; align-items:flex-end; overflow:hidden;
}
.ph .ph-label{
  font-family:var(--mono); font-size:11.5px; letter-spacing:.08em; color:var(--ink-3);
  background:var(--paper-2); border:1px solid var(--line); border-radius:999px;
  padding:6px 12px; margin:16px;
}
.ph .ph-corner{ position:absolute; top:14px; right:14px; font-family:var(--mono); font-size:11px; color:var(--ink-3); }

/* channel chips */
.chip{
  display:inline-flex; align-items:center;
  font-size:15px; color:var(--ink-2);
  background:var(--paper-2); border:1px solid var(--line);
  border-radius:999px; padding:11px 22px;
  transition:border-color .2s var(--ease), color .2s var(--ease);
}
.chip:hover{ border-color:var(--ink); color:var(--ink); }

/* real images replacing placeholders */
.ind-hero-img{ width:100%; aspect-ratio:16/6.5; object-fit:cover; border-radius:var(--r-lg); display:block; }
.mx-img{ width:100%; aspect-ratio:16/10; object-fit:cover; border-radius:var(--r-lg); display:block; }

/* ===========================================================
   SECTION HEADER
   =========================================================== */
.sect-head{ max-width:760px; }
.sect-head .h2{ margin-top:20px; }
.sect-head .lead{ margin-top:20px; }
.sect-pad{ padding-block:var(--sect); }

/* ---------- Why / advantages grid ---------- */
.adv-grid{ display:grid; grid-template-columns:repeat(2,1fr); gap:1px; background:var(--line); border:1px solid var(--line); border-radius:var(--r-lg); overflow:hidden; margin-top:64px; }
.adv-cell{ background:var(--paper); padding:clamp(28px,3.4vw,52px); display:flex; flex-direction:column; gap:18px; transition:background .3s var(--ease); }
.adv-cell:hover{ background:var(--paper-2); }
.adv-ico{ width:40px; height:40px; }
.adv-cell .num{ font-family:var(--mono); font-size:12px; color:var(--ink-3); letter-spacing:.1em; }
.adv-cell h3{ font-size:22px; font-weight:600; }
.adv-cell p{ margin:0; color:var(--ink-2); font-size:15.5px; line-height:1.62; }
.adv-top{ display:flex; align-items:center; justify-content:space-between; }

/* ===========================================================
   WHAT IS LUMII (about + platform grid)
   =========================================================== */
.about-intro{
  display:grid; grid-template-columns:1fr 1fr; gap:clamp(28px,5vw,72px);
  align-items:start; padding-bottom:clamp(48px,6vw,80px);
  border-bottom:1px solid var(--border);
}
.about-body-col{ padding-top:8px; }
.about-body-col .lead{ max-width:36em; }
.platform-grid{
  display:grid; grid-template-columns:repeat(4,1fr);
  margin-top:clamp(48px,6vw,80px);
  border-top:1px solid var(--border);
}
.platform-cell{
  padding:clamp(28px,3vw,40px) clamp(22px,2.2vw,32px) clamp(32px,3.5vw,44px) 0;
  border-right:1px solid var(--border);
  display:flex; flex-direction:column; align-items:flex-start;
}
.platform-cell:last-child{ border-right:0; padding-right:0; }
.pf-num{
  font-family:var(--mono); font-size:12px; color:var(--text-3);
  letter-spacing:.04em;
}
.pf-en{
  font-family:var(--mono); font-size:12.5px; letter-spacing:.03em;
  color:var(--accent,#E8734A); margin-top:clamp(28px,4vw,52px);
}
.platform-cell h3{
  font-size:clamp(19px,1.9vw,23px); font-weight:600; line-height:1.35;
  color:var(--text-1); margin-top:14px;
}
.platform-cell p{
  font-size:14px; color:var(--text-3); line-height:1.55; margin:10px 0 0;
}
.about-foot{
  margin-top:clamp(36px,4vw,52px); font-size:15px; color:var(--text-3);
  max-width:48em; line-height:1.6;
}

@media (max-width:920px){
  .about-intro{ grid-template-columns:1fr; gap:24px; }
  .platform-grid{ grid-template-columns:1fr 1fr; }
  .platform-cell{ border-right:1px solid var(--border); border-bottom:1px solid var(--border); padding:28px 24px 36px; }
  .platform-cell:nth-child(2n){ border-right:0; }
}
@media (max-width:560px){
  .platform-grid{ grid-template-columns:1fr; }
  .platform-cell{ border-right:0 !important; padding:26px 0 30px; }
}
.ind-carousel-head{
  display:flex; align-items:flex-end; justify-content:space-between; gap:32px;
}

/* carousel: contained in .wrap, exactly 2 cards, arrows flank the sides */
.ind-carousel{
  margin-top:clamp(40px,5vw,72px);
  position:relative;
  display:flex; align-items:center;
  gap:clamp(10px,1.6vw,22px);
}
.ind-viewport{ flex:1 1 auto; overflow:hidden; min-width:0; }
.ind-track{
  --card-gap:clamp(18px,2.2vw,30px);
  display:flex; gap:var(--card-gap);
  overflow-x:auto; scroll-snap-type:x mandatory;
  -webkit-overflow-scrolling:touch;
  scrollbar-width:none; cursor:grab;
  padding-bottom:8px;
}
.ind-track::-webkit-scrollbar{ display:none; }
.ind-track.grabbing{ cursor:grabbing; scroll-snap-type:none; }

.ind-card{
  flex:0 0 calc((100% - var(--card-gap)) / 2);
  scroll-snap-align:start;
  text-decoration:none; color:inherit;
  display:flex; flex-direction:column; gap:18px;
  transition:opacity .3s var(--ease);
}
.ind-card:hover{ opacity:.85; }
.ind-card-img{
  width:100%; aspect-ratio:4/3; overflow:hidden; border-radius:var(--r-md);
  background:var(--bg-alt);
}
.ind-card-img img{
  width:100%; height:100%; object-fit:cover;
  transition:transform .6s var(--ease);
}
.ind-card:hover .ind-card-img img{ transform:scale(1.03); }
.ind-card h3{
  font-size:clamp(18px,1.8vw,24px); font-weight:600; margin:0;
}
.ind-card p{
  font-size:14px; color:var(--text-3); margin:0; line-height:1.5;
}

/* flanking arrow buttons */
.carousel-btn{
  flex:0 0 auto;
  width:clamp(40px,3.4vw,52px); height:clamp(40px,3.4vw,52px);
  border-radius:50%; border:1px solid var(--border);
  background:var(--surface); color:var(--text-1);
  display:flex; align-items:center; justify-content:center;
  transition:background .2s var(--ease), border-color .2s var(--ease), opacity .2s;
  cursor:pointer; align-self:center;
  /* vertically center on the image area (image is 3/4 of card width per card; card≈half viewport) */
  margin-bottom:64px;
}
.carousel-btn:hover{ border-color:var(--text-1); background:var(--bg-alt); }
.carousel-btn:disabled{ opacity:.28; cursor:default; }

@media (max-width:640px){
  .ind-carousel-head{ flex-direction:column; align-items:flex-start; }
  .ind-card{ flex:0 0 100%; }
  .carousel-btn{ margin-bottom:50px; width:38px; height:38px; }
}

/* ===========================================================
   ARCHITECTURE — interactive isometric stack
   =========================================================== */
.archx{ margin-top:0; }
.archx-head{ text-align:center; max-width:640px; margin:0 auto; }
.archx-head .h2{ margin-top:16px; }
.archx-head .lead{ margin-top:16px; margin-inline:auto; }

.archx-stage{
  position:relative; margin:clamp(36px,5vw,72px) auto 0;
  max-width:1080px; height:clamp(440px,46vw,560px);
}
.archx-iso-wrap{
  position:absolute; left:50%; top:50%; transform:translate(-50%,-50%);
  width:clamp(260px,30vw,380px); height:clamp(260px,30vw,380px);
  perspective:1500px;
}
.archx-iso{
  position:absolute; inset:0;
  transform-style:preserve-3d;
  transform:rotateX(56deg) rotateZ(45deg);
}
.archx-plane{
  --z:0px; --lift:0px;
  position:absolute; inset:0; border-radius:20px;
  background:rgba(255,255,255,.66);
  border:1px solid rgba(255,255,255,.85);
  box-shadow:0 1px 1px rgba(13,13,15,.04), 0 36px 60px -34px rgba(13,13,15,.55);
  backdrop-filter:blur(7px); -webkit-backdrop-filter:blur(7px);
  transform:translateZ(calc(var(--z) + var(--lift)));
  transition:transform .6s var(--ease), opacity .45s var(--ease), box-shadow .45s var(--ease), border-color .45s var(--ease);
  cursor:pointer; overflow:hidden;
}
.archx-plane[data-l="1"]{ --z:186px; }
.archx-plane[data-l="2"]{ --z:108px; }
.archx-plane[data-l="3"]{ --z:34px;  }
.archx-plane[data-l="4"]{ --z:-38px; }
.archx-plane.is-dim{ opacity:.52; box-shadow:0 1px 1px rgba(13,13,15,.03), 0 18px 36px -28px rgba(13,13,15,.4); }
.archx-plane.is-active{ --lift:30px; border-color:color-mix(in srgb, var(--accent) 55%, #fff); box-shadow:0 1px 1px rgba(13,13,15,.05), 0 44px 70px -34px rgba(13,13,15,.6), 0 0 0 1px color-mix(in srgb, var(--accent) 30%, transparent); }

/* plane surface content (decorative, rides the iso tilt) */
.pl-pad{ position:absolute; inset:0; padding:20px; }

/* L1 — Monitoring dashboard (chart on top, table below) */
.pl-monitor{ position:absolute; inset:10px; border-radius:12px; background:rgba(255,255,255,.65); border:1px solid var(--border); display:flex; flex-direction:column; overflow:hidden; }
.plm-chart{ flex:1; display:flex; padding:10px 10px 0 4px; border-bottom:1px solid var(--border); position:relative; }
.plm-y{ display:flex; flex-direction:column; justify-content:space-between; font-size:5px; color:var(--text-3); width:22px; text-align:right; padding:2px 4px 14px 0; flex-shrink:0; }
.plm-graph{ flex:1; position:relative; display:flex; flex-direction:column; }
.plm-graph svg{ flex:1; display:block; }
.plm-x{ display:flex; justify-content:space-between; font-size:5px; color:var(--text-3); padding:3px 0 6px; }
.plm-table{ font-size:5.5px; color:var(--text-2); }
.plm-hd{ display:grid; grid-template-columns:1.3fr 1fr .9fr 1fr; gap:4px; padding:7px 12px 5px; font-weight:600; color:var(--text-3); border-bottom:1px solid var(--border); font-size:5px; letter-spacing:.04em; }
.plm-tr{ display:grid; grid-template-columns:1.3fr 1fr .9fr 1fr; gap:4px; padding:4px 12px; border-bottom:1px solid rgba(0,0,0,.03); align-items:center; }
.ag{ display:inline-block; width:5px; height:5px; border-radius:50%; margin-right:3px; vertical-align:middle; }
.ag-blue{ background:#60A5FA; } .ag-red{ background:#F87171; } .ag-grn{ background:#34D399; }

/* L2 — Tool icon grid */
.pl-tools{ position:absolute; inset:0; padding:16px; display:grid; grid-template-columns:repeat(3,1fr); grid-template-rows:repeat(3,1fr); gap:10px; }
.plt-cell{ border-radius:10px; background:rgba(255,255,255,.62); border:1px solid var(--border); display:flex; align-items:center; justify-content:center; color:var(--text-2); }
.plt-cell svg{ width:22px; height:22px; }
.plt-center{ background:rgba(255,255,255,.8); }

/* L3 — Skill cards (staircase) */
.pl-skills{ position:absolute; inset:0; padding:16px 14px; display:flex; flex-direction:column; justify-content:center; gap:6px; }
.pls-row{ display:flex; gap:6px; align-items:stretch; }
.pls-bar{ flex:0 0 auto; min-width:48px; padding:5px 8px; border-radius:8px; background:rgba(255,255,255,.5); border:1px solid var(--border); font-size:5.5px; font-family:var(--mono); color:var(--text-3); display:flex; align-items:center; }
.pls-spacer{ flex:0 0 48px; }
.pls-card{ flex:0 0 auto; padding:6px 10px; border-radius:8px; font-size:6.5px; font-weight:600; color:#fff; display:flex; align-items:center; gap:4px; letter-spacing:.02em; }
.pls-ico{ font-size:7px; }
.pls-warm{ background:linear-gradient(135deg,#FDBA74,#FB923C); }
.pls-blue{ background:linear-gradient(135deg,#93C5FD,#3B82F6); }
.pls-purple{ background:linear-gradient(135deg,#C4B5FD,#8B5CF6); }
.pls-pink{ background:linear-gradient(135deg,#FCA5A5,#F43F5E); }

/* L4 — Multi-model infrastructure grid */
.pl-models{ position:absolute; inset:0; padding:10px 12px; display:flex; flex-direction:column; }
.plm-head{ display:flex; align-items:center; gap:4px; }
.plm-title{ font-size:7px; font-weight:700; color:var(--text-1); }
.plm-sub{ font-size:4.5px; color:var(--text-3); margin-top:2px; }
.plm-grid{ flex:1; display:grid; grid-template-columns:repeat(3,1fr); grid-template-rows:1fr 1fr; gap:5px; margin-top:6px; }
.plm-card{ border-radius:6px; background:rgba(255,255,255,.6); border:1px solid var(--border); padding:5px 6px; display:flex; flex-direction:column; justify-content:space-between; overflow:hidden; }
.plm-card-top{ display:flex; align-items:center; gap:3px; }
.plm-ico{ font-size:6px; font-weight:700; flex-shrink:0; }
.plm-name{ font-size:5.5px; font-weight:700; color:var(--text-1); white-space:nowrap; }
.plm-tags{ display:flex; gap:2px; flex-wrap:wrap; margin-top:3px; }
.plm-tags span{ font-size:3.8px; font-family:var(--mono); color:var(--text-3); padding:1px 3px; background:rgba(0,0,0,.03); border-radius:2px; white-space:nowrap; }

/* labels around the stack */
.archx-label{ position:absolute; max-width:230px; cursor:pointer; }
.archx-label .ll-tick{ width:26px; height:3px; border-radius:2px; background:var(--accent); opacity:0; transform:scaleX(.4); transform-origin:left; transition:opacity .35s var(--ease), transform .35s var(--ease); margin-bottom:13px; }
.archx-label .ll-title{ font-size:16px; font-weight:600; color:var(--ink-3); letter-spacing:-.01em; transition:color .3s var(--ease); }
.archx-label .ll-desc{ font-size:13px; line-height:1.5; color:var(--ink-3); margin-top:7px; opacity:.7; transition:opacity .3s var(--ease); }
.archx-label.is-active .ll-title{ color:var(--ink); }
.archx-label.is-active .ll-desc{ opacity:1; }
.archx-label.is-active .ll-tick{ opacity:1; transform:scaleX(1); }
.archx-labels{ position:absolute; inset:0; pointer-events:none; }
.archx-label{ pointer-events:auto; background:transparent; border:0; padding:0; margin:0; font-family:inherit; text-align:left; display:block; }
.archx-label.pos-1{ left:0;  top:18%; }
.archx-label.pos-2{ right:0; top:34%; text-align:right; }
.archx-label.pos-2 .ll-tick{ margin-left:auto; transform-origin:right; }
.archx-label.pos-3{ left:0;  top:60%; }
.archx-label.pos-4{ right:0; top:74%; text-align:right; }
.archx-label.pos-4 .ll-tick{ margin-left:auto; transform-origin:right; }

/* ===========================================================
   PROCESS / steps
   =========================================================== */
.steps{ display:grid; grid-template-columns:repeat(4,1fr); gap:1px; background:var(--line); border-top:1px solid var(--line); border-bottom:1px solid var(--line); margin-top:64px; }
.step{ background:var(--paper); padding:clamp(28px,2.6vw,40px) clamp(22px,2vw,30px) clamp(34px,3vw,48px); position:relative; display:flex; flex-direction:column; gap:16px; transition:background .3s var(--ease); }
.step:hover{ background:var(--paper-2); }
.step .st-lbl{ font-family:var(--mono); font-size:12px; letter-spacing:.14em; color:var(--ink-3); }
.step .st-dot{ width:10px; height:10px; border-radius:50%; border:1px solid var(--ink); position:relative; }
.step .st-dot::after{ content:""; position:absolute; inset:2px; border-radius:50%; background:var(--ink); transform:scale(0); transition:transform .3s var(--ease); }
.step:hover .st-dot::after{ transform:scale(1); }
.step h3{ font-size:20px; font-weight:600; font-family:var(--serif); }
.step p{ margin:0; color:var(--ink-2); font-size:14.5px; line-height:1.6; }

/* ===========================================================
   CONTACT / CTA FORM
   =========================================================== */
.cta-grid{ display:grid; grid-template-columns:1fr 1fr; gap:clamp(36px,6vw,96px); align-items:start; }
.cta-copy .h2{ margin-top:22px; }
.cta-copy .lead{ margin-top:22px; }
.form{ display:grid; gap:20px; }
.field{ display:flex; flex-direction:column; gap:9px; }
.field label{ font-size:13px; font-weight:500; color:var(--ink-2); font-family:var(--mono); letter-spacing:.04em; }
.field input,.field select,.field textarea{
  font-family:var(--sans); font-size:16px; color:var(--ink);
  background:var(--paper-2); border:1px solid var(--line-2); border-radius:var(--r-md);
  padding:14px 16px; width:100%; transition:border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.field textarea{ resize:vertical; min-height:120px; line-height:1.55; }
.field input:focus,.field select:focus,.field textarea:focus{ outline:none; border-color:var(--ink); box-shadow:0 0 0 3px rgba(13,13,15,.06); }
.field input::placeholder,.field textarea::placeholder{ color:var(--ink-3); }
.field.row2{ display:grid; grid-template-columns:1fr 1fr; gap:20px; }
.field.invalid input,.field.invalid select,.field.invalid textarea{ border-color:#9a3b2e; }
.field .err{ font-size:12.5px; color:#9a3b2e; display:none; }
.field.invalid .err{ display:block; }
.form-submit{ width:100%; justify-content:center; }
.form-success{ display:none; padding:40px 32px; border:1px solid var(--line); border-radius:var(--r-lg); background:var(--paper-2); text-align:center; }
.form-success.show{ display:block; animation:fadeUp .5s var(--ease); }
.form-success .ck{ width:46px; height:46px; margin:0 auto 18px; border-radius:50%; background:var(--ink); display:flex; align-items:center; justify-content:center; }

/* ===========================================================
   FOOTER
   =========================================================== */
.footer{ border-top:1px solid var(--line); padding-block:clamp(56px,7vw,90px) 40px; }
.footer-top{ display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr 1fr; gap:40px; }
.footer .brand{ margin-bottom:18px; }
.footer-blurb{ color:var(--ink-3); font-size:14px; max-width:24em; line-height:1.6; }
.footer-col h4{ font-family:var(--mono); font-size:12px; letter-spacing:.12em; text-transform:uppercase; color:var(--ink-3); font-weight:500; margin-bottom:18px; }
.footer-col a{ display:block; font-size:14.5px; color:var(--ink-2); padding:6px 0; transition:color .2s; }
.footer-col a:hover{ color:var(--ink); }
.footer-bottom{ display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:16px; margin-top:clamp(48px,6vw,80px); padding-top:28px; border-top:1px solid var(--line); }
.footer-bottom .fine{ font-family:var(--mono); font-size:12px; color:var(--ink-3); letter-spacing:.04em; }

/* ===========================================================
   INDUSTRY PAGE specifics
   =========================================================== */
.breadcrumb{ display:flex; align-items:center; gap:10px; font-family:var(--mono); font-size:12.5px; color:var(--ink-3); letter-spacing:.04em; padding-top:36px; white-space:nowrap; }
.breadcrumb a{ color:var(--ink-3); transition:color .2s; }
.breadcrumb a:hover{ color:var(--ink); }
.breadcrumb .sep{ color:var(--line-2); }
.ind-hero{ padding-top:24px; padding-bottom:var(--sect); }
.ind-hero h1{ margin-top:26px; font-size:clamp(38px,5.4vw,80px); }
.ind-hero .lead{ margin-top:26px; max-width:32em; }

/* challenges */
.chal{ display:flex; flex-direction:column; }
.chal-row{ display:grid; grid-template-columns:14px 1fr 1fr; gap:clamp(24px,4vw,64px); padding:clamp(36px,4vw,60px) 0; border-top:1px solid var(--line); align-items:start; }
.chal-row:last-child{ border-bottom:1px solid var(--line); }
.chal-num{ font-family:var(--mono); font-size:13px; color:var(--ink-3); padding-top:6px; }
.chal-problem .tag-prob{ font-family:var(--mono); font-size:11.5px; letter-spacing:.1em; text-transform:uppercase; color:var(--ink-3); }
.chal-problem h3{ font-size:clamp(20px,2vw,26px); font-weight:600; margin-top:12px; line-height:1.3; }
.chal-problem p{ color:var(--ink-2); font-size:15px; line-height:1.62; margin-top:14px; }
.chal-solution{ background:none; border:0; border-left:1px solid var(--line); border-radius:0; padding:0 0 0 clamp(24px,4vw,64px); }
.chal-solution .tag-sol{ display:inline-flex; align-items:center; gap:8px; font-family:var(--mono); font-size:11.5px; letter-spacing:.1em; text-transform:uppercase; color:var(--ink); white-space:nowrap; }
.chal-solution .tag-sol .sq{ width:8px; height:8px; background:var(--accent); }
.chal-solution h3{ font-family:var(--serif); font-size:clamp(19px,2vw,24px); font-weight:600; margin-top:14px; }
.chal-solution p{ color:var(--ink-2); font-size:15px; line-height:1.62; margin-top:13px; }

/* capabilities */
.caps{ display:grid; grid-template-columns:repeat(2,1fr); gap:1px; background:var(--line); border:1px solid var(--line); border-radius:var(--r-lg); overflow:hidden; margin-top:60px; }
.cap{ background:var(--paper); padding:clamp(28px,3vw,46px); display:flex; gap:22px; transition:background .3s var(--ease); }
.cap:hover{ background:var(--paper-2); }
.cap .cap-n{ font-family:var(--mono); font-size:13px; color:var(--ink-3); flex-shrink:0; padding-top:4px; }
.cap h3{ font-size:20px; font-weight:600; }
.cap p{ color:var(--ink-2); font-size:15px; line-height:1.6; margin-top:12px; }

/* facts — restrained editorial stat row */
.facts{ display:grid; grid-template-columns:repeat(3,1fr); margin-top:clamp(44px,5vw,68px); }
.fact{ padding:clamp(26px,3vw,38px) clamp(28px,3vw,44px) 4px 0; }
.fact:not(:first-child){ padding-left:clamp(28px,3vw,44px); border-left:1px solid var(--line); }
.fact-n{ font-family:var(--mono); font-size:12px; letter-spacing:.12em; color:var(--ink-3); }
.fact-fig{ display:flex; align-items:baseline; gap:.12em; margin-top:20px; font-weight:500; font-size:clamp(26px,2.5vw,32px); letter-spacing:-.01em; color:var(--accent); line-height:1; }
.fact-fig .fact-u{ font-family:var(--mono); font-weight:400; font-size:.42em; letter-spacing:.02em; color:var(--ink-3); }
.fact-lbl{ color:var(--ink-2); font-size:14.5px; line-height:1.6; margin-top:16px; max-width:20em; }
@media (max-width:760px){
  .facts{ grid-template-columns:1fr; }
  .fact{ padding:clamp(22px,5vw,30px) 0 4px; }
  .fact:not(:first-child){ padding-left:0; border-left:none; border-top:1px solid var(--line); padding-top:clamp(22px,5vw,30px); }
}

/* flow diagram — real-time enforcement */
.flow{ margin-top:clamp(48px,6vw,84px); }
.flow svg{ display:block; width:100%; height:auto; max-width:1080px; margin-inline:auto; overflow:visible; }
.flow-pill{ font-family:var(--sans); font-size:19px; font-weight:500; fill:#FFFFFF; letter-spacing:.01em; }
.flow-pill-dark{ font-size:16px; fill:#0D0D0F; }
.flow-tag{ font-family:var(--sans); font-size:18px; font-weight:400; fill:var(--ink-2); }
@media (max-width:760px){
  .flow{ overflow-x:auto; -webkit-overflow-scrolling:touch; }
  .flow svg{ min-width:760px; }
}

/* metrics */
.metrics{ display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--line); border-top:1px solid var(--line); border-bottom:1px solid var(--line); margin-top:60px; }
.metric{ background:var(--paper); padding:clamp(36px,4vw,60px) clamp(24px,2.4vw,36px); }
.metric .big{ font-weight:500; font-size:clamp(28px,2.6vw,36px); line-height:1; letter-spacing:-.01em; color:var(--accent); display:flex; align-items:baseline; }
.metric .big .u{ font-family:var(--mono); font-size:.42em; font-weight:400; letter-spacing:.02em; margin-left:5px; color:var(--ink-3); }
.metric .lbl{ color:var(--ink-2); font-size:15px; margin-top:20px; max-width:18em; }

/* case study */
.cases{ display:grid; gap:24px; margin-top:60px; }
.case{ border:1px solid var(--line); border-radius:var(--r-lg); padding:clamp(28px,3.4vw,52px); background:var(--paper-2); }
.case .case-tag{ font-family:var(--mono); font-size:12px; letter-spacing:.12em; text-transform:uppercase; color:var(--ink-3); }
.case h3{ font-family:var(--serif); font-size:clamp(22px,2.4vw,30px); font-weight:600; margin-top:16px; }
.case .case-bg{ color:var(--ink-2); font-size:15.5px; line-height:1.64; margin-top:18px; max-width:62em; }
.case .case-pts{ list-style:none; padding:0; margin:26px 0 0; display:grid; gap:14px; }
.case .case-pts li{ display:flex; gap:14px; font-size:15px; color:var(--ink-2); line-height:1.55; }
.case .case-pts li .bx{ width:7px; height:7px; background:var(--ink); margin-top:8px; flex-shrink:0; }
.case-empty{ border:1px dashed var(--line-2); border-radius:var(--r-lg); padding:60px 32px; text-align:center; color:var(--ink-3); font-family:var(--mono); font-size:13px; letter-spacing:.06em; }

/* big closing CTA band */
.closer{ padding-block:var(--sect); }
.closer-inner{ max-width:880px; }
.closer .h2{ margin-top:22px; }
.closer .lead{ margin-top:22px; }
.closer-cta{ display:flex; flex-wrap:wrap; gap:14px; margin-top:38px; }

/* ===========================================================
   Reveal animation
   =========================================================== */
.reveal{ opacity:0; transform:translateY(22px); transition:opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in{ opacity:1; transform:none; }
[data-stagger]>*{ opacity:0; transform:translateY(20px); transition:opacity .6s var(--ease), transform .6s var(--ease); }
[data-stagger].in>*{ opacity:1; transform:none; }
/* snap fallback: when the observer can't run (frozen/background context),
   show content with no transition so it never stays hidden */
.reveal-snap .reveal, .reveal-snap [data-stagger]>*{ transition:none !important; }
@keyframes fadeUp{ from{ opacity:0; transform:translateY(14px); } to{ opacity:1; transform:none; } }

@media (prefers-reduced-motion: reduce){
  *{ animation:none !important; transition:none !important; scroll-behavior:auto !important; }
  .reveal,[data-stagger]>*{ opacity:1 !important; transform:none !important; }
}

/* ===========================================================
   RESPONSIVE
   =========================================================== */
@media (max-width: 1080px){
  .footer-top{ grid-template-columns:1fr 1fr; gap:32px 24px; }
}
/* Architecture diagram: the rotated iso stack is visually ~540px wide,
   so it collides with the side labels well before phone widths.
   Below 1100px, drop the labels into a grid beneath the diagram. */
@media (max-width: 1100px){
  .archx-stage{ height:auto; }
  .archx-iso-wrap{
    position:relative; left:auto; top:auto; transform:none;
    margin:clamp(140px,17vw,180px) auto clamp(56px,7vw,90px);
  }
  .archx-labels{
    position:static; display:grid; grid-template-columns:1fr 1fr;
    gap:28px clamp(28px,5vw,64px); margin-top:0; pointer-events:auto;
  }
  .archx-label{ position:static; max-width:none; text-align:left !important; }
  .archx-label.pos-1,.archx-label.pos-2,.archx-label.pos-3,.archx-label.pos-4{
    left:auto; right:auto; top:auto;
  }
  .archx-label .ll-tick{ margin-left:0 !important; transform-origin:left !important; }
}
@media (max-width: 920px){
  .nav-menu, .nav-cta .ghostlink, .nav-cta .nav-login{ display:none; }
  .nav-toggle{ display:flex; }
  .steps{ grid-template-columns:repeat(2,1fr); }
  .cta-grid{ grid-template-columns:1fr; }
  .chal-row{ grid-template-columns:1fr; gap:22px; }
  .chal-num{ padding-top:0; }
  .chal-solution{ border-left:0; padding-left:0; padding-top:22px; border-top:1px solid var(--line); }
  .caps{ grid-template-columns:1fr; }
  .metrics{ grid-template-columns:1fr; }

  .mobile-menu{
    display:block; position:fixed; inset:72px 0 0; z-index:70;
    background:var(--paper); padding:24px var(--gutter);
    transform:translateY(-8px); opacity:0; visibility:hidden; pointer-events:none;
    transition:opacity .3s var(--ease), transform .3s var(--ease), visibility .3s;
    overflow-y:auto;
  }
  .mobile-menu.open{ opacity:1; visibility:visible; pointer-events:auto; transform:none; }
  .mobile-menu a{ display:block; padding:14px 0; font-size:18px; border-bottom:1px solid var(--line); }
  .mobile-menu .mm-sub{ font-family:var(--mono); font-size:12px; letter-spacing:.1em; text-transform:uppercase; color:var(--ink-3); margin-top:24px; }
  .mobile-menu .mm-cta{ margin-top:28px; display:grid; gap:12px; }
}
@media (max-width: 640px){
  .adv-grid{ grid-template-columns:1fr; }
  .steps{ grid-template-columns:1fr; }
  .field.row2{ grid-template-columns:1fr; }
  .mx-metric{ flex-direction:column; gap:10px; }

  /* hero — let the headline wrap and scale to the screen */
  .hero{ min-height:auto; padding:calc(var(--nav-h) + 40px) 0 56px; }
  .hero-inner .h1{ white-space:normal; font-size:clamp(34px, 9vw, 52px); line-height:1.12; }
  .hero .lead{ font-size:16px; margin-top:20px; max-width:none; }
  .hero h1{ margin-top:22px; }
  .hero-cta{ margin-top:30px; gap:12px; }
  .hero-cta .btn{ flex:1 1 auto; justify-content:center; }
}
@media (max-width: 380px){
  .hero-inner .h1{ font-size:32px; }
  .hero-cta{ flex-direction:column; }
  .hero-cta .btn{ width:100%; }
}