/* ============================================================
   Robot on Rails — 2026 design system (shared)
   Dark graphite + teal. Used by all pages for a consistent look.
   ============================================================ */
:root{
  --bg:#0a0b0c; --bg2:#0f1113; --surface:#141618; --surface2:#191c1f;
  --line:#262a2c; --teal:#19c9a8; --teal-bright:#37e0c6; --teal-deep:#0d9a7d;
  --text:#f3f5f4; --muted:#c4ccca; --dim:#99a2a0; --faint:#6e7674;
  --display:'Oxanium',sans-serif; --body:'Source Sans 3',system-ui,sans-serif; --mono:'IBM Plex Mono',monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:linear-gradient(180deg,rgba(7,9,10,.4) 0%,rgba(7,9,10,.6) 100%),url(../images/bg/dna-bg.jpg?v=2) center center/cover no-repeat fixed,#08090a;color:var(--text);font-family:var(--body);line-height:1.7;overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{color:var(--teal);text-decoration:none}
img{max-width:100%}
.wrap{max-width:1080px;margin:0 auto;padding:0 2rem}
h1,h2,h3,h4{font-family:var(--display);font-weight:600;line-height:1.12}
.eyebrow{font-family:var(--mono);text-transform:uppercase;letter-spacing:2px;font-size:.78rem;color:var(--teal)}
.gtext{background:linear-gradient(90deg,var(--teal-bright),var(--teal));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}

/* header */
header{position:fixed;top:0;left:0;right:0;z-index:200;background:rgba(10,11,12,0);transition:background .3s,border-color .3s;border-bottom:1px solid transparent}
header.scrolled{background:rgba(10,11,12,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
header .bar{display:flex;align-items:center;justify-content:space-between;padding:1rem 2rem;max-width:1200px;margin:0 auto}
.logo{display:flex;flex-direction:column;align-items:flex-start;gap:.32rem;font-family:var(--display);font-weight:700;letter-spacing:1px;color:#fff}
.logo img{width:auto;height:53px;object-fit:contain;border-radius:8px;box-sizing:border-box;margin-left:-12px}
.logo span{font-size:.74rem;letter-spacing:.14em;color:#fff}
.logo .r2{color:#fff}
.nav{display:flex;align-items:center;gap:1.6rem}
.nav a{color:var(--muted);font-weight:500;font-size:.95rem;transition:color .2s}
.nav a:hover,.nav a.active{color:var(--teal-bright)}
.nav .cta{background:var(--teal);color:#04241c;padding:.55rem 1.1rem;border-radius:8px;font-weight:600}
.nav .cta:hover{background:var(--teal-bright);color:#04241c}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.burger span{width:24px;height:2px;background:var(--text);border-radius:2px;transition:.3s}
.burger.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.active span:nth-child(2){opacity:0}
.burger.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* rail spine */
.rail{display:none}
.railv{position:fixed;top:0;bottom:0;left:0;width:5px;background:rgba(21,194,163,.18);z-index:200;opacity:1}
.railv::before{content:"";position:absolute;top:0;left:0;width:100%;height:var(--rail,0%);background:linear-gradient(var(--teal),var(--teal-bright));box-shadow:0 0 12px rgba(21,194,163,.6);transition:height .1s linear}
.railv .bot{position:absolute;left:50%;top:var(--rail,0%);width:18px;height:18px;border-radius:5px;background:var(--teal-bright);box-shadow:0 0 22px rgba(47,213,180,1);transform:translate(-50%,-50%);transition:top .1s linear}
@media(max-width:880px){.railv{display:block}}

/* buttons */
.btn{display:inline-block;font-family:var(--display);font-weight:600;padding:.85rem 1.7rem;border-radius:9px;transition:transform .2s,background .2s,border-color .2s,color .2s;cursor:pointer}
.btn-p{background:var(--teal);color:#04241c;border:2px solid var(--teal)}
.btn-p:hover{background:var(--teal-bright);border-color:var(--teal-bright);transform:translateY(-2px)}
.btn-s{background:transparent;color:var(--text);border:2px solid var(--teal-deep)}
.btn-s:hover{border-color:var(--teal);color:var(--teal-bright)}

/* page hero (inner pages) */
.page-hero{position:relative;padding:9rem 0 3rem;text-align:center;overflow:hidden}
.page-hero .glow{position:absolute;inset:0;z-index:0;background:radial-gradient(55% 50% at 50% 28%,rgba(21,194,163,.14),transparent 70%);pointer-events:none}
.page-hero .wrap{position:relative;z-index:2}
.page-hero h1{font-size:3.1rem;margin:1rem 0 1rem}
.page-hero p.sub{font-size:1.2rem;color:var(--muted);max-width:42rem;margin:0 auto 1.6rem}

/* sections */
section.blk{padding:5rem 0;position:relative}
.blk h2{font-size:2.2rem;margin:.5rem 0 1rem}
.blk h3{font-size:1.3rem;color:var(--text);margin:1.5rem 0 .5rem}
.blk p{color:var(--muted);font-size:1.05rem}
.blk .lede{color:var(--muted);font-size:1.12rem;max-width:44rem;margin-bottom:2.5rem}
.blk ul{color:var(--muted);font-size:1.05rem;padding-left:1.3rem;margin:.5rem 0 1.5rem}
.blk li{margin-bottom:.5rem}
.blk strong{color:var(--teal-bright)}
.alt{background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.center{text-align:center;margin-left:auto;margin-right:auto}

/* grids */
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:1.4rem}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:1.2rem}

/* cards */
.panel{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:1.7rem;transition:transform .25s,border-color .25s,box-shadow .25s}
.panel:hover{transform:translateY(-4px);border-color:var(--teal-deep);box-shadow:0 16px 34px rgba(0,0,0,.5)}
.panel h3{font-family:var(--display);color:var(--text);font-size:1.1rem;margin:0 0 .4rem}
.panel p{color:var(--dim);font-size:.95rem}
.panel .ic{width:42px;height:42px;border-radius:10px;background:rgba(21,194,163,.12);border:1px solid var(--teal-deep);display:flex;align-items:center;justify-content:center;color:var(--teal-bright);margin-bottom:1rem;font-size:1.1rem}

/* metric / stat */
.metric{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:1.7rem 1.4rem;text-align:center;transition:transform .25s,border-color .25s}
.metric:hover{transform:translateY(-4px);border-color:var(--teal-deep)}
.metric .n{font-family:var(--display);font-weight:700;font-size:2.3rem;color:var(--teal-bright);line-height:1}
.metric .l{color:var(--dim);font-size:.88rem;margin-top:.45rem;line-height:1.4}

/* numbered steps */
.step{display:flex;gap:1.2rem;padding:1.2rem 0;border-top:1px solid var(--line)}
.step:first-of-type{border-top:none}
.step .num{flex:none;width:44px;height:44px;border-radius:50%;background:rgba(21,194,163,.12);border:2px solid var(--teal-deep);color:var(--teal-bright);font-family:var(--display);font-weight:700;display:flex;align-items:center;justify-content:center}
.step h3{margin:.15rem 0 .3rem;font-size:1.1rem}
.step p{color:var(--dim);font-size:.98rem;margin:0}

/* highlight box */
.hl{background:var(--surface);border-left:4px solid var(--teal);border-radius:0 10px 10px 0;padding:1.3rem 1.5rem;margin:1.8rem 0}
.hl p{color:var(--muted);margin:0}

/* diagram stage + animations */
.stage{background:#0e0d0a;border:1px solid #221e1a;border-radius:12px;height:150px;display:flex;align-items:center;justify-content:center;overflow:hidden;margin-bottom:1rem}
.stage.hwvid{height:180px;padding:0}
.stage.hwvid video{width:100%;height:100%;object-fit:cover;display:block}
@media(prefers-reduced-motion:no-preference){
  .d-rail{animation:d-rail 6s ease-in-out infinite}@keyframes d-rail{0%,100%{transform:translateX(12px)}50%{transform:translateX(250px)}}
  .d-scan{transform-origin:center;animation:d-scan 4s ease-in-out infinite}@keyframes d-scan{0%{transform:translateY(8px);opacity:0}12%{opacity:1}88%{opacity:1}100%{transform:translateY(96px);opacity:0}}
  .d-check{transform-origin:center;animation:d-pop 4s ease-in-out infinite}@keyframes d-pop{0%,58%{transform:scale(.5);opacity:0}74%{transform:scale(1.15);opacity:1}100%{transform:scale(1);opacity:1}}
  .d-spin{transform-origin:60px 60px;animation:d-spin 12s linear infinite}@keyframes d-spin{to{transform:rotate(360deg)}}
}

/* reveal */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

/* recognition strip */
.recog{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--bg2)}
.recog .wrap{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:.7rem 1rem;padding:1.1rem 2rem;font-family:var(--mono);font-size:.78rem;color:var(--dim)}
.recog .rl{color:var(--faint);text-transform:uppercase;letter-spacing:1.5px}
.recog a{color:var(--muted)}.recog a:hover{color:var(--teal-bright)}
.recog .sep{color:var(--line)}
@media(max-width:880px){.recog .sep{display:none}}

/* final CTA */
.cta-final{text-align:center;padding:5.5rem 2rem}
.cta-final h2{font-size:2.4rem;margin-bottom:1rem}
.cta-final p{color:var(--muted);font-size:1.12rem;max-width:34rem;margin:0 auto 2rem}

/* footer */
footer.site{background:#000;border-top:1px solid var(--line);padding:3rem 2rem 2rem;margin-top:2rem}
footer.site .cols{max-width:1080px;margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:2rem}
footer.site h4{font-family:var(--display);color:var(--text);font-size:.95rem;margin-bottom:.8rem}
footer.site a{display:block;color:var(--dim);font-size:.9rem;margin-bottom:.5rem}
footer.site a:hover{color:var(--teal-bright)}
footer.site .brand a.logo{display:flex;flex-direction:column;align-items:flex-start;gap:.32rem;margin-bottom:1rem}
footer.site .brand a.logo:hover span{color:#fff}
footer.site .brand p{color:var(--dim);font-size:.9rem;max-width:22rem;margin-top:.6rem}
footer.site .bot{max-width:1080px;margin:2rem auto 0;padding-top:1.5rem;border-top:1px solid var(--line);color:var(--faint);font-size:.82rem;text-align:center}

/* video */
.video-frame{border-radius:14px;overflow:hidden;border:1px solid var(--line);box-shadow:0 24px 60px rgba(0,0,0,.5);background:#000}
.video-frame video,.video-frame img{width:100%;display:block}

@media(max-width:880px){
  .nav{display:none}.burger{display:flex}
  .nav.open{display:flex;flex-direction:column;align-items:flex-start;position:absolute;top:100%;left:0;right:0;background:rgba(10,11,12,.98);border-top:1px solid var(--line);padding:1.2rem 2rem;gap:1rem}
  .page-hero h1{font-size:2.3rem}.blk h2{font-size:1.8rem}
  .grid2,.grid3,.grid4{grid-template-columns:1fr}
  .grid4{grid-template-columns:1fr 1fr}
  footer.site .cols{grid-template-columns:1fr 1fr}
}
@media(max-width:560px){.grid4{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none}}

/* ---- new-header dropdown (Company) ---- */
.nav .has-dd{position:relative}
.nav .has-dd>a .cv{font-size:.7em;opacity:.7;margin-left:3px}
.nav .dd{position:absolute;top:100%;left:0;min-width:170px;background:#141618;border:1px solid var(--line);border-radius:10px;box-shadow:0 14px 34px rgba(0,0,0,.55);padding:8px;display:flex;flex-direction:column;opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .18s,transform .18s;z-index:1000}
.nav .has-dd:hover .dd,.nav .has-dd:focus-within .dd{opacity:1;visibility:visible;transform:none}
.nav .dd a{padding:.5rem .7rem;border-radius:6px;color:var(--muted);white-space:nowrap;font-size:.95rem}
.nav .dd a:hover{background:var(--surface2);color:var(--teal-bright)}
/* mega dropdown (icon + label + description) */
.nav .dd.mega{min-width:340px;padding:10px;gap:2px}
.nav .dd.mega a{display:flex;gap:.75rem;align-items:flex-start;padding:.65rem .7rem;white-space:normal}
.nav .dd.mega .mi{flex:none;width:32px;height:32px;border-radius:8px;background:rgba(21,194,163,.12);border:1px solid var(--teal-deep);display:flex;align-items:center;justify-content:center;color:var(--teal-bright)}
.nav .dd.mega .mi svg{width:17px;height:17px}
.nav .dd.mega .mt b{display:block;font-family:var(--display);font-weight:600;color:var(--text);font-size:.96rem;line-height:1.2}
.nav .dd.mega .mt small{display:block;color:var(--dim);font-size:.8rem;line-height:1.35;margin-top:.15rem}
.nav .dd.mega a:hover .mt b{color:var(--teal-bright)}
@media(max-width:880px){
  .nav.open .has-dd{display:flex;flex-direction:column;width:100%}
  .nav.open .dd{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:0;background:transparent;padding:.2rem 0 .4rem .9rem;min-width:0}
  .nav.open .dd.mega{min-width:0}
}