:root{
    --navy-950:#041B36;
    --navy-900:#0B2A52;
    --navy-800:#123863;
    --blue-deep:#0052BE;
    --blue-light:#179CFE;
    --bg:#F5F7FA;
    --ink:#0F2138;
    --steel:#647186;
    --steel-lt:#8A96A8;
    --hairline:#DEE4EA;
    --hairline-dark:rgba(255,255,255,0.14);
    --white:#FFFFFF;
  }

  *{margin:0;padding:0;box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    background:var(--bg);
    color:var(--ink);
    font-family:'IBM Plex Sans', sans-serif;
    font-size:16px;
    line-height:1.6;
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3,h4,.display{
    font-family:'Archivo', sans-serif;
    font-weight:800;
    letter-spacing:-0.01em;
    color:var(--navy-950);
  }
  a{color:inherit;text-decoration:none;}
  img{max-width:100%;display:block;}
  .wrap{max-width:1240px;margin:0 auto;padding:0 40px;}

  @media (prefers-reduced-motion: no-preference){
    .load-in{opacity:0;transform:translateY(16px);animation:riseIn 0.9s cubic-bezier(.2,.7,.2,1) forwards;}
    @keyframes riseIn{to{opacity:1;transform:translateY(0);}}
  }
  @media (prefers-reduced-motion: reduce){.load-in{opacity:1;transform:none;}}

  /* ================= NAV ================= */
  header.site-nav{position:sticky;top:0;z-index:100;background:#020F20;}
  .nav-inner{display:flex;align-items:center;justify-content:space-between;height:76px;}
  .nav-inner img.logo{height:26px;width:auto;}
  nav.links{display:flex;gap:26px;}
  nav.links a{font-size:14px;font-weight:500;color:#C6D3E3;position:relative;padding:4px 0;white-space:nowrap;}
  nav.links a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--blue-light);transform:scaleX(0);transform-origin:left;transition:transform .25s ease;}
  nav.links a:hover{color:var(--white);}
  nav.links a:hover::after{transform:scaleX(1);}
  .nav-cta{font-size:14px;font-weight:600;color:var(--white);padding:9px 4px;white-space:nowrap;position:relative;transition:color .2s ease;}
  .nav-cta::after{content:"";position:absolute;left:4px;right:4px;bottom:4px;height:2px;background:var(--blue-light);transform:scaleX(0);transform-origin:left;transition:transform .25s ease;}
  .nav-cta:hover{color:var(--blue-light);}
  .nav-cta:hover::after{transform:scaleX(1);}
  .nav-mobile-hide{display:flex;align-items:center;gap:26px;}

  /* ================= MOBILE NAV (hamburger) ================= */
  .nav-burger{
    display:none;
    flex-direction:column;
    justify-content:center;
    align-items:flex-end;
    gap:5px;
    width:32px;
    height:32px;
    background:none;
    border:none;
    padding:0;
    cursor:pointer;
    z-index:210;
  }
  .nav-burger span{
    display:block;
    height:2px;
    background:var(--white);
    border-radius:2px;
    transition:transform .3s cubic-bezier(.2,.7,.2,1), opacity .3s ease, width .3s ease;
    width:26px;
  }
  .nav-burger span:nth-child(2){width:19px;}
  .nav-burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg);width:26px;}
  .nav-burger.open span:nth-child(2){opacity:0;}
  .nav-burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);width:26px;}

  .mobile-nav{
    position:fixed;
    inset:0;
    z-index:200;
    background:#020F20;
    display:flex;
    align-items:center;
    justify-content:center;
    opacity:0;
    visibility:hidden;
    transform:translateY(-8px);
    transition:opacity .3s ease, transform .3s ease, visibility 0s linear .3s;
  }
  .mobile-nav.open{
    opacity:1;
    visibility:visible;
    transform:translateY(0);
    transition:opacity .3s ease, transform .3s ease, visibility 0s linear 0s;
  }
  .mobile-nav-links{display:flex;flex-direction:column;align-items:center;gap:8px;}
  .mobile-nav-links a{
    font-family:'Archivo', sans-serif;
    font-size:28px;
    font-weight:700;
    color:var(--white);
    padding:14px 0;
    opacity:0.92;
  }
  .mobile-nav-links a:active{opacity:1;color:var(--blue-light);}
  .mobile-nav-links a.mobile-nav-cta{
    margin-top:20px;
    font-size:17px;
    font-weight:600;
    color:var(--navy-950);
    background:var(--white);
    padding:14px 40px;
    border-radius:2px;
  }
  body.nav-open{overflow:hidden;}

  /* ================= HERO ================= */
  .hero{position:relative;background:var(--navy-950);overflow:hidden;color:var(--white);}
  .hero-photo{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:58% 50%;}
  .hero-scrim{position:absolute;inset:0;background:linear-gradient(90deg, rgba(4,27,54,0.97) 0%, rgba(4,27,54,0.82) 32%, rgba(4,27,54,0.42) 62%, rgba(4,27,54,0.55) 100%), linear-gradient(0deg, rgba(4,27,54,0.9) 0%, rgba(4,27,54,0.15) 45%);}
  .hero-inner{position:relative;padding:112px 0 88px;min-height:640px;display:flex;flex-direction:column;justify-content:flex-end;}
  .hero-kicker{display:flex;align-items:center;gap:12px;margin-bottom:26px;}
  .hero-kicker .line{width:40px;height:3px;background:linear-gradient(90deg,var(--blue-deep),var(--blue-light));border-radius:2px;}
  .hero-kicker span{font-size:13.5px;font-weight:500;color:#AFC3DC;}
  .hero h1{color:var(--white);font-size:clamp(44px, 5.8vw, 84px);line-height:0.98;font-weight:900;max-width:900px;}
  .hero h2.hero-sub{
    margin-top:22px;
    max-width:680px;
    font-size:clamp(19px, 2vw, 25px);
    font-weight:500;
    color:#CBD9EA;
    line-height:1.5;
    font-family:'IBM Plex Sans', sans-serif;
    letter-spacing:0;
  }

  /* ================= STAT STRIP ================= */
  .stat-strip{background:var(--navy-950);border-bottom:1px solid var(--hairline-dark);}
  .stat-grid{display:grid;grid-template-columns:repeat(4,1fr);}
  .stat{padding:40px 36px;border-left:1px solid var(--hairline-dark);}
  .stat:first-child{border-left:none;}
  .stat .num{font-family:'Archivo', sans-serif;font-weight:800;font-size:34px;color:var(--white);letter-spacing:-0.01em;}
  .stat .num.tbd{color:#7C90AC;font-weight:700;}
  .stat .label{margin-top:6px;font-size:13.5px;color:#9CACC2;max-width:22ch;}

  /* ================= SECTION HEADING PATTERN ================= */
  .section{padding:104px 0;}
  .section-head{display:flex;gap:64px;margin-bottom:52px;}
  .section-head .col-label{flex:0 0 260px;}
  .section-head .col-label .line{width:40px;height:3px;background:linear-gradient(90deg,var(--blue-deep),var(--blue-light));border-radius:2px;margin-bottom:18px;}
  .section-head h2.kicker{font-size:15px;font-weight:600;letter-spacing:0.01em;color:var(--navy-900);}
  .section-head .col-text{flex:1;}
  .section-head .col-text h3{font-size:clamp(24px,2.6vw,32px);font-weight:800;line-height:1.25;max-width:680px;margin-bottom:10px;}
  .section-head .col-text p{font-size:16.5px;color:var(--steel);font-weight:400;line-height:1.6;max-width:620px;}

  /* ================= BRANDS ================= */
  .brands{background:var(--navy-950);color:var(--white);}
  .brands > .wrap.brands-body{padding-top:80px;padding-bottom:120px;}

  .parent-brand{
    display:flex;
    align-items:baseline;
    gap:48px;
    padding-bottom:40px;
    margin-bottom:8px;
    border-bottom:1px solid var(--hairline-dark);
    flex-wrap:wrap;
  }
  .parent-brand .p-logo{display:flex;align-items:baseline;}
  .parent-brand .p-logo img{height:34px;width:auto;filter:brightness(0) invert(1);}
  .parent-brand .p-text{flex:1;min-width:280px;}
  .parent-brand .p-tag{font-size:11.5px;font-weight:600;letter-spacing:0.1em;color:#6E82A0;margin-bottom:10px;}
  .parent-brand .p-desc{font-size:16px;color:#C6D3E3;max-width:620px;line-height:1.65;}

  .brand-list{}
  .brand-row{
    display:grid;
    grid-template-columns:220px 170px 1fr;
    align-items:center;
    gap:32px;
    padding:30px 20px;
    border-bottom:1px solid var(--hairline-dark);
    transition:background .3s ease;
    opacity:0;
    transform:translateY(16px);
  }
  .brand-row.in-view{opacity:1;transform:translateY(0);transition:opacity .6s cubic-bezier(.2,.7,.2,1), transform .6s cubic-bezier(.2,.7,.2,1), background .3s ease;}
  .brand-row:hover{background:rgba(255,255,255,0.03);}
  .brand-row .r-logo{height:34px;display:flex;align-items:center;}
  .brand-row .r-logo img{max-height:100%;max-width:180px;width:auto;height:auto;object-fit:contain;opacity:0.92;transition:opacity .3s ease;}
  .brand-row:hover .r-logo img{opacity:1;}
  .brand-row .arkyle-mark{font-family:'Archivo', sans-serif;font-weight:800;font-size:17px;letter-spacing:0.12em;color:var(--white);opacity:0.92;}
  .brand-row .r-cat{font-size:12.5px;font-weight:500;color:#7C90AC;}
  .brand-row .r-desc{font-size:14.5px;color:#B9C6D8;line-height:1.55;}
  .brand-note{margin-top:32px;font-size:13px;color:#6E82A0;font-style:italic;}
  .brand-row:nth-child(1){transition-delay:0s;}
  .brand-row:nth-child(2){transition-delay:.05s;}
  .brand-row:nth-child(3){transition-delay:.1s;}
  .brand-row:nth-child(4){transition-delay:.15s;}
  .brand-row:nth-child(5){transition-delay:.2s;}
  .brand-row:nth-child(6){transition-delay:.25s;}
  .brand-row:nth-child(7){transition-delay:.3s;}
  .brand-row:nth-child(8){transition-delay:.35s;}
  .brand-row:nth-child(9){transition-delay:.4s;}
  @media (prefers-reduced-motion: reduce){
    .brand-row{opacity:1;transform:none;transition:none;}
  }

  /* ================= PILLARS (What makes RAVR different) ================= */
  .pillars{background:var(--white);}
  .engine-covers{display:flex;flex-direction:column;}
  .engine-cover{position:relative;height:460px;overflow:hidden;}
  .engine-cover img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center 20%;}
  .engine-cover .ec-scrim{position:absolute;inset:0;background:linear-gradient(90deg, rgba(4,27,54,0.94) 0%, rgba(4,27,54,0.72) 38%, rgba(4,27,54,0.3) 75%), linear-gradient(0deg, rgba(4,27,54,0.55) 0%, rgba(4,27,54,0.05) 55%);}
  .engine-cover .ec-row{position:relative;height:100%;display:flex;flex-direction:column;justify-content:flex-end;padding:0 0 40px;}
  .engine-cover .ec-kicker{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
  .engine-cover .ec-kicker .line{width:40px;height:3px;background:linear-gradient(90deg,var(--blue-deep),var(--blue-light));border-radius:2px;}
  .engine-cover .ec-kicker span{font-size:13px;font-weight:600;letter-spacing:0.04em;color:var(--blue-light);}
  .engine-cover h3{font-size:clamp(26px,3vw,36px);color:var(--white);font-weight:800;line-height:1.2;max-width:620px;margin-bottom:12px;}
  .engine-cover p{font-size:15.5px;color:#C6D3E3;max-width:520px;line-height:1.6;}
  .engine-cover.in-view{}
  .engine-cover .ec-row > *{opacity:0;transform:translateY(20px);transition:opacity .7s cubic-bezier(.2,.7,.2,1), transform .7s cubic-bezier(.2,.7,.2,1);}
  .engine-cover.in-view .ec-row > *{opacity:1;transform:translateY(0);}
  .engine-cover .ec-row > *:nth-child(2){transition-delay:.08s;}
  .engine-cover .ec-row > *:nth-child(3){transition-delay:.16s;}
  @media (prefers-reduced-motion: reduce){
    .engine-cover .ec-row > *{opacity:1;transform:none;transition:none;}
  }

  /* ================= CATEGORIES ================= */
  .categories{background:var(--bg);}
  .categories > .wrap{padding-top:56px;padding-bottom:104px;}
  .cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
  .cat-tile{
    position:relative;
    aspect-ratio:3/4;
    border-radius:2px;
    overflow:hidden;
    display:flex;
    flex-direction:column;
    justify-content:flex-end;
    padding:26px;
  }
  .cat-tile img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s cubic-bezier(.2,.7,.2,1);}
  .cat-tile:hover img{transform:scale(1.035);}
  .cat-tile .tile-scrim{position:absolute;inset:0;background:linear-gradient(0deg, rgba(4,27,54,0.88) 0%, rgba(4,27,54,0.25) 45%, rgba(4,27,54,0.05) 70%);}
  .cat-tile .tile-name{position:relative;font-family:'Archivo', sans-serif;font-weight:700;font-size:19px;color:var(--white);}
  .cat-tile .tile-sub{position:relative;margin-top:6px;font-size:13px;color:#C6D3E3;}

  /* ================= SECTION COVER (reusable chapter-opener) ================= */
  .section-cover{
    position:relative;
    min-height:320px;
    display:flex;
    flex-direction:column;
    justify-content:flex-end;
    color:var(--white);
    overflow:hidden;
    background:linear-gradient(180deg, var(--navy-950) 0%, var(--navy-900) 100%);
  }
  .section-cover.has-photo img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center 15%;}
  .section-cover .sc-scrim{position:absolute;inset:0;background:linear-gradient(90deg, rgba(4,27,54,0.94) 0%, rgba(4,27,54,0.68) 40%, rgba(4,27,54,0.3) 100%), linear-gradient(0deg, rgba(4,27,54,0.85) 0%, rgba(4,27,54,0.05) 55%);}
  .section-cover .sc-threads{position:absolute;inset:0;opacity:0.45;pointer-events:none;}
  .section-cover .sc-inner{position:relative;padding:72px 0 44px;}
  .section-cover.full-screen{min-height:100vh;}
  .section-cover.full-screen .sc-inner{padding-bottom:96px;}
  .section-cover .sc-kicker{display:flex;align-items:center;gap:12px;margin-bottom:20px;}
  .section-cover .sc-kicker .line{width:40px;height:3px;background:linear-gradient(90deg,var(--blue-deep),var(--blue-light));border-radius:2px;}
  .section-cover .sc-kicker span{font-size:13.5px;font-weight:500;color:#AFC3DC;}
  .section-cover h3{color:var(--white);font-size:clamp(28px,3.6vw,46px);font-weight:800;line-height:1.18;max-width:760px;}
  .section-cover p{margin-top:16px;font-size:16.5px;color:#C6D3E3;max-width:600px;line-height:1.6;}

  /* ================= PROPRIETARY TECHNOLOGIES ================= */
  .tech{background:var(--navy-950);}
  .tech-covers{display:flex;flex-direction:column;}
  .tech-cover{
    position:relative;
    height:460px;
    overflow:hidden;
  }
  .tech-cover img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center 15%;}
  .tech-cover .tc-scrim{position:absolute;left:0;right:0;bottom:0;height:190px;background:linear-gradient(0deg, rgba(4,27,54,0.92) 0%, rgba(4,27,54,0) 100%);}
  .tech-cover .tc-row{position:relative;height:100%;display:flex;align-items:flex-end;padding:0 0 26px;}
  .tech-cover .tc-tags{display:flex;flex-wrap:wrap;gap:8px;}
  .tech-tag{font-size:12px;font-weight:500;color:var(--white);background:rgba(255,255,255,0.12);border:1px solid rgba(255,255,255,0.35);padding:6px 13px;border-radius:20px;backdrop-filter:blur(2px);}
  .tech-tag.more{color:rgba(255,255,255,0.7);background:transparent;border-style:dashed;}
  .tech-footnote{margin-top:36px;padding-bottom:96px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;}
  .tech-footnote p{font-size:14.5px;color:#9CACC2;}

  /* ================= FOOTPRINT ================= */
  .footprint{background:var(--navy-950);color:var(--white);}
  .footprint > .wrap.footprint-body{padding-top:64px;padding-bottom:104px;}
  .footprint .section-head h2.kicker{color:#AFC3DC;}
  .footprint .section-head .col-text h3{color:var(--white);}
  .footprint .section-head .col-text p{color:#9CACC2;}
  .flow{display:flex;align-items:stretch;gap:0;margin-bottom:56px;flex-wrap:wrap;}
  .flow-node{flex:1;min-width:170px;padding:22px 22px 22px 0;position:relative;}
  .flow-node:not(:last-child)::after{
    content:"";
    position:absolute;right:8px;top:34px;
    width:14px;height:14px;
    border-top:1.5px solid #4A6488;border-right:1.5px solid #4A6488;
    transform:rotate(45deg);
  }
  .flow-node .f-tag{font-size:11.5px;color:#6E82A0;text-transform:none;margin-bottom:8px;}
  .flow-node .f-name{font-family:'Archivo', sans-serif;font-weight:700;font-size:18px;color:var(--white);margin-bottom:6px;}
  .flow-node .f-sub{font-size:12.5px;color:#8AA0BC;}
  .market-note{font-size:13px;color:#6E82A0;font-style:italic;margin-bottom:40px;}
  .footprint-stat{display:flex;gap:56px;flex-wrap:wrap;border-top:1px solid var(--hairline-dark);padding-top:36px;}
  .footprint-stat .num{font-family:'Archivo', sans-serif;font-weight:800;font-size:32px;color:var(--white);}
  .footprint-stat .label{font-size:13px;color:#8AA0BC;margin-top:4px;max-width:24ch;}

  /* ================= CAREERS ================= */
  .careers-section{background:var(--navy-950);}
  .careers-section > .wrap.careers-body{padding-top:64px;padding-bottom:0;}
  .careers-head{max-width:760px;margin-bottom:56px;}
  .careers-head h2.kicker{font-size:15px;font-weight:600;color:var(--navy-900);margin-bottom:18px;}
  .careers-head h3{font-size:clamp(28px,3.4vw,42px);line-height:1.2;margin-bottom:16px;}
  .careers-head p{font-size:17px;color:var(--steel);line-height:1.6;max-width:640px;}

  .bog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--hairline-dark);border:1px solid var(--hairline-dark);margin-bottom:0;}
  .bog-card{position:relative;aspect-ratio:4/5;overflow:hidden;padding:32px;display:flex;flex-direction:column;justify-content:flex-end;}
  .bog-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center 20%;transition:transform .5s cubic-bezier(.2,.7,.2,1);}
  .bog-card:hover img{transform:scale(1.035);}
  .bog-card .bog-scrim{position:absolute;inset:0;background:linear-gradient(0deg, rgba(2,15,32,0.94) 0%, rgba(2,15,32,0.4) 55%, rgba(2,15,32,0.08) 80%);}
  .bog-card .boglabel{position:relative;font-family:'Archivo', sans-serif;font-weight:800;font-size:13px;letter-spacing:0.06em;color:var(--blue-light);margin-bottom:14px;}
  .bog-card h4{position:relative;font-size:18px;font-weight:700;color:var(--white);margin-bottom:8px;}
  .bog-card p{position:relative;font-size:14px;color:#C6D3E3;line-height:1.55;}

  .org-strip{background:var(--navy-950);}
  .org-grid{display:grid;grid-template-columns:repeat(4,1fr);}
  .org-stat{padding:32px 30px;border-left:1px solid var(--hairline-dark);}
  .org-stat:first-child{border-left:none;}
  .org-stat .num{font-family:'Archivo', sans-serif;font-weight:800;font-size:28px;color:var(--white);}
  .org-stat .label{margin-top:4px;font-size:12.5px;color:#8AA0BC;}

  .roles{background:var(--navy-950);}
  .roles-list{border-top:1px solid var(--hairline-dark);margin-top:56px;}
  .role-row{display:grid;grid-template-columns:1fr 200px 120px;align-items:center;gap:20px;padding:22px 0;border-bottom:1px solid var(--hairline-dark);}
  .role-row .role-title{font-size:16px;font-weight:600;color:var(--white);}
  .role-row .role-loc{font-size:13.5px;color:#9CACC2;}
  .role-row .role-apply{font-size:13.5px;font-weight:600;color:var(--blue-light);text-align:right;}
  .role-row .role-apply:hover{text-decoration:underline;}
  .roles-footnote{margin-top:28px;padding-bottom:64px;font-size:14px;color:#9CACC2;}
  .roles-footnote a{color:var(--blue-light);font-weight:600;}

  /* ================= FOOTER ================= */
  footer{background:var(--navy-950);color:#9CACC2;padding:72px 0 32px;}
  .footer-top{display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap;padding-bottom:56px;border-bottom:1px solid var(--hairline-dark);}
  .footer-brand img{height:26px;margin-bottom:18px;}
  .footer-brand p{max-width:300px;font-size:14px;color:#8AA0BC;line-height:1.6;}
  .footer-cols{display:flex;gap:70px;flex-wrap:wrap;}
  .footer-col h4{font-size:13px;font-weight:600;color:var(--white);margin-bottom:16px;}
  .footer-col a, .footer-col p{display:block;font-size:14px;color:#8AA0BC;margin-bottom:10px;}
  .footer-col a:hover{color:var(--white);}
  .footer-bottom{padding-top:28px;display:flex;justify-content:space-between;font-size:12.5px;color:#5E6F87;flex-wrap:wrap;gap:12px;}

  /* ================= RESPONSIVE ================= */
  @media (max-width:1080px){
    .engine-cover{height:auto;min-height:340px;padding:32px 0;}
    .cat-grid{grid-template-columns:repeat(3,1fr);}
    .org-grid{grid-template-columns:repeat(2,1fr);}
    .org-stat:nth-child(3){border-left:none;}
  }
  @media (max-width:900px){
    .wrap{padding:0 24px;}
    nav.links{display:none;}
    .nav-cta{display:none;}
    .nav-burger{display:flex;}
    .stat-grid{grid-template-columns:repeat(2,1fr);}
    .stat:nth-child(2n+1){border-left:none;}
    .section{padding:68px 0;}
    .section-head{flex-direction:column;gap:20px;}
    .section-head .col-label{flex:none;}
    .brand-row{grid-template-columns:1fr;gap:8px;padding:24px 0;}
    .parent-brand{gap:16px;}
    .cat-grid{grid-template-columns:repeat(2,1fr);}
    .tech-cover{height:320px;}
    .bog-grid{grid-template-columns:1fr;}
    .org-grid{grid-template-columns:repeat(2,1fr);}
    .role-row{grid-template-columns:1fr;gap:6px;}
    .role-row .role-apply{text-align:left;}
    .hero-inner{padding:84px 0 60px;min-height:auto;}
    .hero-arrow-bg{width:66%;}
    .flow{flex-direction:column;}
    .flow-node::after{display:none;}
  }