/* Public landing v2: demo, theme, sticky navbar, logo */
.site-header{position:sticky;top:0;z-index:1000}.nav-wrap{width:min(1340px,calc(100% - 42px))}.brand{min-width:350px}.brand-symbol img{width:38px;height:38px;display:block}.brand-logo-word{height:42px;width:260px;object-fit:contain;object-position:left center;filter:drop-shadow(0 0 12px rgba(78,231,255,.18))}.brand-text-fallback{display:none}.round-btn{display:inline-grid!important;place-items:center!important;align-items:center!important;justify-content:center!important;line-height:1!important}.round-btn i{display:block;line-height:1!important;margin:0!important}.public-home .hero{padding:62px 0 36px}.hero-logo-word{display:block;width:min(760px,100%);height:auto;margin:0 0 18px;filter:drop-shadow(0 0 24px rgba(78,231,255,.10))}.hero-title-fallback{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}.public-demo-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(330px,.65fr);gap:22px;align-items:stretch;margin-top:30px}.demo-chat{border:1px solid var(--line);border-radius:32px;background:rgba(5,8,14,.78);box-shadow:var(--shadow);overflow:hidden}.demo-chat-top{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 18px;border-bottom:1px solid rgba(120,231,255,.12);background:rgba(255,255,255,.025)}.demo-chat-title{display:flex;align-items:center;gap:12px;font-weight:900}.demo-chat-title img{width:38px;height:38px;border-radius:50%;filter:drop-shadow(0 0 16px rgba(78,231,255,.45))}.demo-chat-body{display:grid;gap:14px;padding:24px}.demo-msg{max-width:82%;padding:14px 16px;border-radius:20px;line-height:1.6;border:1px solid rgba(120,231,255,.14)}.demo-msg.user{justify-self:end;background:rgba(255,255,255,.07)}.demo-msg.ai{justify-self:start;background:rgba(78,231,255,.07)}.demo-prompt{margin:0 18px 18px;padding:14px 16px;border:1px solid rgba(120,231,255,.22);border-radius:22px;background:rgba(0,0,0,.30);color:var(--muted);display:flex;justify-content:space-between;gap:12px}.demo-prompt i{color:var(--cyan)}.capability-panel{display:grid;gap:14px}.cap-card{border:1px solid var(--line);border-radius:24px;background:var(--panel);padding:20px;box-shadow:0 20px 60px rgba(0,0,0,.22)}.cap-card i{color:var(--cyan);font-size:20px;margin-bottom:12px}.cap-card h3{margin:0 0 8px}.cap-card p{margin:0;color:var(--muted);line-height:1.55}.skills-section{padding:18px 0 72px}.skills-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.skill-card{border:1px solid var(--line);background:var(--panel);border-radius:24px;padding:22px;min-height:170px}.skill-card i{color:var(--cyan);font-size:22px}.skill-card h3{margin:14px 0 8px}.skill-card p{color:var(--muted);line-height:1.6;margin:0}.back-to-top{position:fixed;right:24px;bottom:24px;width:48px;height:48px;border-radius:50%;border:1px solid rgba(120,231,255,.28);background:rgba(5,12,20,.86);color:var(--ink);display:grid;place-items:center;cursor:pointer;box-shadow:0 18px 50px rgba(0,0,0,.3);opacity:0;pointer-events:none;transform:translateY(12px);transition:.18s ease;z-index:1100}.back-to-top.is-visible{opacity:1;pointer-events:auto;transform:translateY(0)}.back-to-top:hover{color:var(--cyan);border-color:var(--cyan)}
body.public-home:not(.public-light){--bg:#05070c;--ink:#eef7fb;--muted:#91a2ad;--line:rgba(120,231,255,.18);--line2:rgba(120,231,255,.36);--panel:rgba(9,14,24,.86);--panel2:rgba(13,21,35,.72);--shadow:0 28px 90px rgba(0,0,0,.42);background:radial-gradient(circle at 8% 12%,rgba(78,231,255,.16),transparent 28%),radial-gradient(circle at 90% 18%,rgba(161,110,255,.15),transparent 30%),linear-gradient(140deg,#040509 0%,#07101b 45%,#04060b 100%)!important;color:#eef7fb!important}body.public-home:not(.public-light) .site-header{background:rgba(5,7,12,.86)!important;border-bottom-color:rgba(120,231,255,.12)!important}body.public-home:not(.public-light) .brand-logo-word,body.public-home:not(.public-light) .hero-logo-word{content:url('/assets/positronic-wordmark-dark.png')}body.public-home:not(.public-light) .brand-symbol,body.public-home:not(.public-light) .round-btn,body.public-home:not(.public-light) .hero-pills span,body.public-home:not(.public-light) .demo-chat,body.public-home:not(.public-light) .cap-card,body.public-home:not(.public-light) .skill-card,body.public-home:not(.public-light) .status-grid div{background:var(--panel)!important;border-color:var(--line)!important;color:#eef7fb!important}body.public-home:not(.public-light) .hero-lead,body.public-home:not(.public-light) .footer-col a,body.public-home:not(.public-light) .footer-col p{color:#b9c9d3!important}body.public-home:not(.public-light) .demo-prompt{background:rgba(0,0,0,.30)!important;border-color:rgba(120,231,255,.22)!important}body.public-home:not(.public-light) .demo-msg.user{background:rgba(255,255,255,.07)!important;color:#eef7fb!important}body.public-home:not(.public-light) .demo-msg.ai{background:rgba(78,231,255,.07)!important;color:#eef7fb!important}body.public-home:not(.public-light) .site-footer{background:linear-gradient(90deg,rgba(5,10,18,.96),rgba(22,14,42,.92))!important;border-top-color:rgba(120,231,255,.12)!important}
body.public-light{--bg:#edf6fb;--ink:#071827;--muted:#49697c;--line:rgba(0,101,140,.24);--line2:rgba(0,126,170,.34);--panel:rgba(248,252,255,.78);--panel2:rgba(235,246,252,.82);--shadow:0 26px 80px rgba(28,86,116,.14);background:radial-gradient(circle at 8% 12%,rgba(0,151,204,.10),transparent 30%),radial-gradient(circle at 90% 18%,rgba(92,124,255,.11),transparent 30%),linear-gradient(140deg,#d9ebf4 0%,#edf6fb 48%,#f8fcff 100%)!important;color:#071827!important}body.public-light:before{background:linear-gradient(rgba(0,75,110,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(0,75,110,.04) 1px,transparent 1px);background-size:44px 44px}.public-light .site-header{background:rgba(239,248,253,.88)!important;border-bottom-color:rgba(0,101,140,.16)}.public-light .brand-logo-word,.public-light .hero-logo-word{content:url('/assets/positronic-wordmark-light.png');filter:none}.public-light .brand-symbol,.public-light .round-btn,.public-light .hero-pills span,.public-light .demo-chat,.public-light .cap-card,.public-light .skill-card,.public-light .status-grid div{background:rgba(248,252,255,.78)!important;border-color:rgba(0,101,140,.22)!important;color:#071827!important}.public-light .hero-lead,.public-light .footer-col a,.public-light .footer-col p{color:#49697c}.public-light .demo-prompt{background:rgba(255,255,255,.70);border-color:rgba(0,101,140,.20)}.public-light .demo-msg.user{background:rgba(255,255,255,.78);color:#071827}.public-light .demo-msg.ai{background:rgba(218,244,252,.70);color:#071827}.public-light .site-footer{background:linear-gradient(90deg,rgba(235,247,253,.96),rgba(246,250,255,.94));border-top-color:rgba(0,101,140,.16)}.public-light .back-to-top{background:rgba(248,252,255,.92);color:#071827;box-shadow:0 18px 50px rgba(28,86,116,.16)}
@media(max-width:1050px){.public-demo-grid,.skills-grid{grid-template-columns:1fr}.brand{min-width:0}.brand-logo-word{width:220px;height:36px}.hero-logo-word{width:min(620px,100%)}.public-home .hero{padding-top:38px}}@media(max-width:720px){.brand-logo-word{width:170px;height:30px}.hero-logo-word{width:min(100%,520px)}.demo-msg{max-width:100%}.skills-grid{gap:12px}.back-to-top{right:16px;bottom:16px}}


/* Landing motion v4 */
.public-home .hero{position:relative;overflow:hidden;--mouse-x:50%;--mouse-y:40%}
.public-home .hero::after{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(circle at var(--mouse-x) var(--mouse-y),rgba(72,221,255,.13),transparent 24%);transition:background .12s linear}
.hero-grid,.public-demo-grid,.system-flow{position:relative;z-index:1}
.hero-copy{align-self:center}
.hero-logo-stage{position:relative;display:grid;place-items:center;width:min(650px,100%);min-height:170px;margin:6px 0 16px;transition:transform .28s ease;transform-style:preserve-3d}
.hero-logo-stage::before{content:"";position:absolute;width:72%;height:82%;border-radius:50%;background:radial-gradient(ellipse,rgba(65,222,255,.18),rgba(103,94,255,.08) 45%,transparent 72%);filter:blur(18px);animation:heroPulse 4s ease-in-out infinite}
.hero-logo-word{position:relative;z-index:2;width:min(600px,92%);margin:0;filter:drop-shadow(0 0 18px rgba(78,231,255,.2));transform:translateZ(28px)}
.hero-orbit{position:absolute;border:1px solid rgba(78,231,255,.2);border-radius:50%;pointer-events:none}
.orbit-one{width:86%;height:112%;animation:orbitFloat 8s linear infinite}
.orbit-two{width:68%;height:88%;border-style:dashed;animation:orbitFloat 11s linear infinite reverse}
.status-grid div{position:relative;overflow:hidden;transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease}
.status-grid div::after{content:"";position:absolute;inset:-80% auto -80% -40%;width:35%;transform:rotate(18deg);background:linear-gradient(90deg,transparent,rgba(255,255,255,.11),transparent);animation:statusScan 5.5s ease-in-out infinite}
.status-grid div:hover{transform:translateY(-5px);border-color:var(--line2)!important;box-shadow:0 18px 40px rgba(0,0,0,.18)}
.status-grid small{display:flex;align-items:center;gap:7px;margin-top:9px;color:var(--muted);font-size:12px}
.status-grid small em{color:var(--cyan);font-style:normal;font-weight:900}
.live-dot{width:7px;height:7px;border-radius:50%;background:#5cf2a6;box-shadow:0 0 10px #5cf2a6;animation:livePulse 1.7s ease-in-out infinite}
.system-flow{display:grid;grid-template-columns:1fr 100px 1fr 100px 1fr;align-items:center;gap:12px;margin-top:34px}
.flow-node{min-height:112px;padding:19px 22px;border:1px solid var(--line);border-radius:24px;background:var(--panel);display:grid;grid-template-columns:auto 1fr;column-gap:13px;align-content:center;box-shadow:0 18px 50px rgba(0,0,0,.13);transition:transform .2s ease,border-color .2s ease}
.flow-node:hover{transform:translateY(-4px);border-color:var(--line2)}
.flow-node i{grid-row:1/3;font-size:26px;color:var(--cyan);align-self:center}
.flow-node span{font-size:11px;text-transform:uppercase;letter-spacing:.16em;color:var(--muted)}
.flow-node strong{margin-top:5px;font-size:17px}
.flow-primary{background:linear-gradient(135deg,rgba(36,199,229,.12),rgba(116,89,255,.12));box-shadow:0 18px 65px rgba(49,204,242,.12)}
.flow-link{display:flex;align-items:center;color:var(--cyan)}
.flow-link span{position:relative;height:1px;flex:1;background:linear-gradient(90deg,transparent,var(--cyan))}
.flow-link span::after{content:"";position:absolute;right:0;top:-3px;width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 12px var(--cyan);animation:flowTravel 1.8s linear infinite}
.cap-card,.skill-card,.demo-chat{transition:transform .24s ease,border-color .24s ease,box-shadow .24s ease}
.cap-card:hover,.skill-card:hover{transform:translateY(-6px);border-color:var(--line2);box-shadow:0 24px 70px rgba(0,0,0,.24)}
.reveal-on-scroll{opacity:0;transform:translateY(24px);transition:opacity .65s ease,transform .65s cubic-bezier(.22,.8,.25,1)}
.reveal-on-scroll.is-visible{opacity:1;transform:none}
.public-light .hero-logo-stage::before{background:radial-gradient(ellipse,rgba(0,145,200,.13),rgba(71,101,235,.07) 45%,transparent 72%)}
.public-light .system-flow .flow-node{background:rgba(248,252,255,.72);box-shadow:0 18px 50px rgba(28,86,116,.1)}
@keyframes heroPulse{0%,100%{opacity:.55;transform:scale(.94)}50%{opacity:1;transform:scale(1.05)}}
@keyframes orbitFloat{to{transform:rotate(360deg)}}
@keyframes statusScan{0%,65%{left:-45%}100%{left:145%}}
@keyframes livePulse{50%{opacity:.45;transform:scale(.75)}}
@keyframes flowTravel{from{right:100%}to{right:0}}
@media(max-width:1050px){.hero-logo-stage{width:min(620px,100%)}.system-flow{grid-template-columns:1fr 56px 1fr 56px 1fr}}
@media(max-width:720px){.hero-logo-stage{min-height:112px}.system-flow{grid-template-columns:1fr}.flow-link{height:34px;justify-content:center}.flow-link span{display:none}.flow-link i{transform:rotate(90deg)}}
@media(prefers-reduced-motion:reduce){.hero-logo-stage::before,.hero-orbit,.status-grid div::after,.live-dot,.flow-link span::after{animation:none!important}.reveal-on-scroll{opacity:1;transform:none}.hero-logo-stage{transition:none}}


/* Landing orbit + light contrast v5 */
.hero-logo-stage::after{content:"";position:absolute;width:53%;aspect-ratio:1;border-radius:50%;border:1px solid rgba(78,231,255,.28);box-shadow:0 0 24px rgba(78,231,255,.12),inset 0 0 28px rgba(78,231,255,.08);animation:coreBreath 3.2s ease-in-out infinite}
.hero-orbit::before,.hero-orbit::after{content:"";position:absolute;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan),0 0 24px rgba(78,231,255,.55)}
.hero-orbit::before{width:8px;height:8px;left:9%;top:18%}
.hero-orbit::after{width:5px;height:5px;right:5%;bottom:26%}
.orbit-one{border-width:2px;box-shadow:0 0 38px rgba(78,231,255,.08),inset 0 0 45px rgba(78,231,255,.05)}
.orbit-two{border-width:1px;box-shadow:0 0 22px rgba(78,231,255,.08)}
.hero-logo-stage:hover .orbit-one{border-color:rgba(78,231,255,.48);box-shadow:0 0 55px rgba(78,231,255,.18),inset 0 0 60px rgba(78,231,255,.09)}
.hero-logo-stage:hover .orbit-two{border-color:rgba(162,112,255,.42)}
@keyframes coreBreath{0%,100%{opacity:.38;transform:scale(.88)}50%{opacity:.9;transform:scale(1.05)}}

body.public-light{--cyan:#167fd1;--line:rgba(22,91,151,.28);--line2:rgba(18,105,183,.58)}
.public-light .section-kicker{color:#126fb9!important}
.public-light .hero::after{background:radial-gradient(circle at var(--mouse-x) var(--mouse-y),rgba(35,126,210,.15),transparent 25%)}
.public-light .hero-logo-stage::before{background:radial-gradient(ellipse,rgba(31,119,207,.18),rgba(82,72,209,.10) 45%,transparent 72%);filter:blur(14px)}
.public-light .hero-logo-stage::after{border-color:rgba(30,113,196,.42);box-shadow:0 0 28px rgba(30,113,196,.18),inset 0 0 32px rgba(30,113,196,.10)}
.public-light .hero-orbit{border-color:rgba(30,113,196,.38)}
.public-light .orbit-one{box-shadow:0 0 35px rgba(30,113,196,.13),inset 0 0 42px rgba(30,113,196,.08)}
.public-light .orbit-two{border-color:rgba(57,102,201,.32);box-shadow:0 0 22px rgba(30,113,196,.12)}
.public-light .hero-orbit::before,.public-light .hero-orbit::after{background:#167fd1;box-shadow:0 0 9px #167fd1,0 0 20px rgba(22,127,209,.48)}
.public-light .flow-node i,.public-light .cap-card i,.public-light .skill-card i,.public-light .demo-prompt i{color:#167fd1!important}
.public-light .flow-link{color:#167fd1}
.public-light .flow-link span{background:linear-gradient(90deg,rgba(22,127,209,.10),#167fd1)}
.public-light .flow-link span::after{background:#167fd1;box-shadow:0 0 11px #167fd1}
.public-light .status-grid small em{color:#126fb9}
.public-light .live-dot{background:#149a64;box-shadow:0 0 9px rgba(20,154,100,.6)}
.public-light .flow-primary{background:linear-gradient(135deg,rgba(22,127,209,.15),rgba(75,76,190,.11))!important;border-color:rgba(22,105,183,.38)!important}
.public-light .demo-chat-title img,.public-light .footer-brand .brand-symbol img{filter:drop-shadow(0 0 11px rgba(22,127,209,.28))}
@media(prefers-reduced-motion:reduce){.hero-logo-stage::after{animation:none!important}}


/* Public navbar parity with the shared Chat/Admin shell */
.public-home .main-nav a{
  position:relative;
  padding:8px 0;
  color:var(--muted);
  transition:color .16s ease;
}
.public-home .main-nav a::after{
  content:'';
  position:absolute;
  left:0;
  right:0;
  bottom:-10px;
  height:2px;
  border-radius:999px;
  background:var(--cyan);
  opacity:0;
  transform:scaleX(.35);
  transition:opacity .16s ease,transform .16s ease;
}
.public-home .main-nav a:hover,
.public-home .main-nav a:focus-visible,
.public-home .main-nav a.is-active{
  color:var(--cyan);
}
.public-home .main-nav a:hover::after,
.public-home .main-nav a:focus-visible::after,
.public-home .main-nav a.is-active::after{
  opacity:1;
  transform:scaleX(1);
}
.public-home .main-nav a.is-active{font-weight:800}
.public-home.public-light .main-nav a{color:#42677b}
.public-home.public-light .main-nav a:hover,
.public-home.public-light .main-nav a:focus-visible,
.public-home.public-light .main-nav a.is-active{color:#1685b5}
.public-home.public-light .main-nav a::after{background:#1685b5}

.home-login-btn{display:inline-flex;align-items:center;gap:8px;min-height:46px;padding:0 16px;border:1px solid var(--line);border-radius:999px;background:rgba(78,231,255,.07);color:var(--ink);font-size:13px;text-decoration:none}
.home-login-btn:hover{border-color:var(--line2);color:var(--cyan);background:rgba(78,231,255,.12)}