:root{--bg:#090b10;--panel:#11151d;--panel2:#0d1118;--text:#edf3ff;--muted:#9aa8bf;--line:#263041;--accent:#68a0ff;--accent2:#7ce7d8;--max:1180px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:radial-gradient(circle at 15% 5%,#13203b 0,transparent 32%),radial-gradient(circle at 85% 0%,#12312e 0,transparent 26%),var(--bg);color:var(--text);line-height:1.6}a{color:inherit;text-decoration:none}.container{width:min(var(--max),calc(100% - 40px));margin:auto}.nav{position:sticky;top:0;z-index:20;backdrop-filter:blur(16px);background:rgba(9,11,16,.76);border-bottom:1px solid rgba(255,255,255,.06)}.nav-inner{height:72px;display:flex;align-items:center;justify-content:space-between}.brand{font-weight:900;letter-spacing:.14em;font-size:18px}.brand span{color:var(--accent2)}.nav-links{display:flex;gap:28px;color:var(--muted);align-items:center}.nav-links a:hover{color:#fff}.nav-toggle{display:none;background:none;border:0;color:#fff;font-size:24px}.hero{padding:110px 0 80px}.eyebrow{text-transform:uppercase;letter-spacing:.16em;color:var(--accent2);font-size:12px;font-weight:800}.hero h1{font-size:clamp(44px,7vw,84px);line-height:1.02;max-width:980px;margin:18px 0}.lead{font-size:clamp(18px,2.1vw,24px);max-width:800px;color:var(--muted)}.actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:34px}.btn{display:inline-flex;align-items:center;gap:9px;padding:13px 18px;border:1px solid var(--line);border-radius:12px;background:#111722;font-weight:750}.btn.primary{background:linear-gradient(135deg,var(--accent),#7b6cff);border-color:transparent}.btn:hover{transform:translateY(-1px)}.section{padding:90px 0}.section h2{font-size:clamp(32px,4.5vw,52px);margin:0 0 14px}.section-intro{color:var(--muted);max-width:740px;font-size:18px}.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;margin-top:42px}.card{position:relative;background:linear-gradient(180deg,rgba(255,255,255,.035),rgba(255,255,255,.015));border:1px solid var(--line);border-radius:20px;padding:28px;overflow:hidden}.card:before{content:"";position:absolute;inset:auto -40px -70px auto;width:170px;height:170px;border-radius:50%;background:radial-gradient(circle,rgba(104,160,255,.16),transparent 70%)}.card .tag{font-size:12px;letter-spacing:.13em;text-transform:uppercase;color:var(--accent2);font-weight:800}.card h3{font-size:28px;margin:10px 0}.card p{color:var(--muted)}.card ul{padding-left:18px;color:#c4cfdf}.card .cta{display:inline-flex;margin-top:14px;font-weight:800;color:#fff}.disabled{opacity:.55;pointer-events:none}.architecture{margin-top:48px;display:grid;grid-template-columns:1fr 1.2fr 1fr;gap:16px;align-items:center}.node{padding:20px;border:1px solid var(--line);border-radius:16px;background:var(--panel2);text-align:center}.node.main{padding:30px;border-color:#44628e;box-shadow:0 0 70px rgba(104,160,255,.08)}.flow{text-align:center;color:#6d7a90;font-size:28px}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:36px}.stat{padding:24px;border-top:1px solid var(--line)}.stat b{display:block;font-size:32px}.stat span{color:var(--muted)}.project-hero{padding:88px 0 50px}.project-hero h1{font-size:clamp(46px,6vw,76px);margin:12px 0}.kicker{color:var(--accent2);font-weight:800}.feature-list{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:32px}.feature{border:1px solid var(--line);background:var(--panel2);padding:22px;border-radius:16px}.feature h3{margin-top:0}.feature p{color:var(--muted)}.compare{width:100%;border-collapse:collapse;margin-top:30px;background:var(--panel2);border-radius:14px;overflow:hidden}.compare th,.compare td{padding:16px;border-bottom:1px solid var(--line);text-align:left}.compare th{background:#121822}.yes{color:#85f0d1;font-weight:800}.no{color:#8995a8}.footer{padding:38px 0;border-top:1px solid var(--line);color:var(--muted);margin-top:70px}.footer-inner{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}.reveal{opacity:0;transform:translateY(18px);transition:.55s ease}.reveal.visible{opacity:1;transform:none}@media(max-width:800px){.nav-toggle{display:block}.nav-links{display:none;position:absolute;top:72px;left:20px;right:20px;flex-direction:column;align-items:flex-start;padding:20px;background:#10141b;border:1px solid var(--line);border-radius:14px}.nav-links.open{display:flex}.grid,.feature-list,.stats,.architecture{grid-template-columns:1fr}.flow{transform:rotate(90deg)}.hero{padding-top:80px}.section{padding:66px 0}}

/* 2026-09-30 mobile fixes */
html,body{max-width:100%;overflow-x:hidden}
@media(max-width:800px){
  .compare{display:block;width:100%;max-width:100%;overflow-x:auto;overflow-y:hidden;-webkit-overflow-scrolling:touch;border-radius:14px}
  .compare tbody{display:table;min-width:680px;width:100%;border-collapse:collapse}
  .compare th,.compare td{min-width:145px;vertical-align:top}
  .compare th:first-child,.compare td:first-child{min-width:180px}
}


/* 2026-10-02 GTBRAIN logo integration */
.brand{display:inline-flex;align-items:center;gap:12px;line-height:1}
.brand img{height:48px;width:auto;display:block}
.hero-brand{margin-bottom:18px}
.hero-logo{display:block;width:min(600px,82vw);max-width:100%;height:auto;filter:drop-shadow(0 12px 32px rgba(31,160,255,.18))}
.footer-brand{display:inline-flex;align-items:center;gap:14px}
.footer-brand img{height:30px;width:auto;display:block}
@media(max-width:800px){.brand img{height:42px}.hero-logo{width:min(470px,92vw)}.footer-brand img{height:26px}}


/* 2026-10-02 restore original generated logo */
.nav-inner{height:auto;min-height:96px;padding:12px 0}
.brand img{height:72px;width:auto;display:block}
.hero-brand{margin-bottom:24px}
.hero-logo{display:block;width:min(700px,92vw);max-width:100%;height:auto;image-rendering:auto;filter:drop-shadow(0 14px 36px rgba(0,0,0,.24))}
.footer-brand img{height:48px;width:auto;display:block}
@media(max-width:800px){.nav-inner{min-height:86px}.brand img{height:58px}.hero-logo{width:min(520px,92vw)}.footer-brand img{height:38px}}


/* 2026-10-02 horizontal transparent site logo integration */
.nav-inner{min-height:88px;padding:10px 0}.brand img{height:54px;width:auto;display:block}.hero-brand{margin-bottom:18px}.hero-logo{display:block;width:min(660px,84vw);max-width:100%;height:auto;filter:drop-shadow(0 8px 24px rgba(0,0,0,.22))}.footer-brand img{height:36px;width:auto;display:block}@media(max-width:800px){.nav-inner{min-height:78px}.brand img{height:44px}.hero-logo{width:min(520px,92vw)}.footer-brand img{height:30px}}


/* 2026-10-02 final original-logo horizontal web assets */
.nav-inner{min-height:86px;padding:10px 0}.brand img{height:42px;width:auto;display:block}.hero-brand{margin-bottom:26px}.hero-logo{display:block;width:min(760px,86vw);max-width:100%;height:auto;filter:none}.footer-brand img{height:30px;width:auto;display:block}@media(max-width:800px){.nav-inner{min-height:74px}.brand img{height:34px}.hero-logo{width:min(520px,92vw)}.footer-brand img{height:24px}}


/* 2026-10-02 dark/light theme system */
:root{
  color-scheme:dark;
  --nav-bg:rgba(9,11,16,.76);
  --body-radial-1:#13203b;
  --body-radial-2:#12312e;
  --card-bg:linear-gradient(180deg,rgba(255,255,255,.035),rgba(255,255,255,.015));
  --button-bg:#111722;
  --table-head:#121822;
  --link-strong:#ffffff;
}
html[data-theme="light"]{
  color-scheme:light;
  --bg:#f5f8fc;
  --panel:#ffffff;
  --panel2:#ffffff;
  --text:#111827;
  --muted:#5e6b7f;
  --line:#d8e0eb;
  --accent:#356fea;
  --accent2:#087f78;
  --nav-bg:rgba(248,250,253,.88);
  --body-radial-1:#dce8ff;
  --body-radial-2:#d8f3ee;
  --card-bg:linear-gradient(180deg,rgba(255,255,255,.96),rgba(247,250,254,.96));
  --button-bg:#ffffff;
  --table-head:#edf2f8;
  --link-strong:#111827;
}
body{transition:background-color .22s ease,color .22s ease;background:radial-gradient(circle at 15% 5%,var(--body-radial-1) 0,transparent 32%),radial-gradient(circle at 85% 0%,var(--body-radial-2) 0,transparent 26%),var(--bg)}
.nav{background:var(--nav-bg);border-bottom-color:var(--line)}
.card{background:var(--card-bg)}
.btn{background:var(--button-bg)}
.card .cta,.nav-links a:hover{color:var(--link-strong)}
.compare th{background:var(--table-head)}
.theme-toggle{width:42px;height:42px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:12px;background:var(--button-bg);color:var(--text);font-size:20px;cursor:pointer;transition:transform .15s ease,background .2s ease,color .2s ease,border-color .2s ease;flex:0 0 auto}
.theme-toggle:hover{transform:translateY(-1px)}
.theme-icon{line-height:1;transform:translateY(-1px)}
html[data-theme="light"] .card ul{color:#334155}
html[data-theme="light"] .node{box-shadow:0 12px 35px rgba(29,53,87,.04)}
html[data-theme="light"] .yes{color:#087f5b}
html[data-theme="light"] .no{color:#6b7280}
html[data-theme="light"] .btn.primary{color:#fff}
html[data-theme="light"] .card:before{background:radial-gradient(circle,rgba(53,111,234,.12),transparent 70%)}
@media(max-width:800px){.theme-toggle{width:40px;height:40px}.nav-links{background:var(--panel);border-color:var(--line)}}


/* 2026-10-03 light theme logo fix: use original logo in both themes and outline it via CSS */
.theme-logo{transition:filter .2s ease,opacity .2s ease}
html[data-theme="light"] .theme-logo{filter:drop-shadow(1px 0 0 rgba(0,0,0,.85)) drop-shadow(-1px 0 0 rgba(0,0,0,.85)) drop-shadow(0 1px 0 rgba(0,0,0,.85)) drop-shadow(0 -1px 0 rgba(0,0,0,.85));}


/* 2026-10-03 light logo cleanup: use dedicated light assets, no CSS outline on icon */
html[data-theme="light"] .theme-logo{filter:none !important;}

/* 2026-10-03 light logo N-stroke fix */


/* 2026-10-03 split logo layout with CSS outline only on wordmark in light theme */
.brand-lockup,.hero-lockup,.footer-lockup{display:inline-flex;align-items:center}
.brand-lockup{gap:12px}.hero-lockup{gap:18px}.footer-lockup{gap:10px}
.split-brand,.footer-brand{text-decoration:none}
.nav-mark{height:42px;width:auto;display:block;flex:0 0 auto}
.nav-wordmark{height:24px;width:auto;display:block;flex:0 0 auto}
.hero-mark{width:min(210px,24vw);max-width:100%;height:auto;display:block;flex:0 0 auto}
.hero-wordmark{width:min(470px,54vw);max-width:100%;height:auto;display:block;flex:0 0 auto}
.footer-mark{height:30px;width:auto;display:block;flex:0 0 auto}
.footer-wordmark{height:18px;width:auto;display:block;flex:0 0 auto}
@media(max-width:800px){.nav-mark{height:34px}.nav-wordmark{height:20px}.hero-lockup{gap:14px}.hero-mark{width:min(156px,28vw)}.hero-wordmark{width:min(330px,58vw)}.footer-mark{height:24px}.footer-wordmark{height:15px}}
html[data-theme="light"] .theme-wordmark{filter:drop-shadow(1px 0 0 rgba(0,0,0,.9)) drop-shadow(-1px 0 0 rgba(0,0,0,.9)) drop-shadow(0 1px 0 rgba(0,0,0,.9)) drop-shadow(0 -1px 0 rgba(0,0,0,.9)) drop-shadow(1px 1px 0 rgba(0,0,0,.75)) drop-shadow(-1px 1px 0 rgba(0,0,0,.75)) drop-shadow(1px -1px 0 rgba(0,0,0,.75)) drop-shadow(-1px -1px 0 rgba(0,0,0,.75)) drop-shadow(2px 0 0 rgba(0,0,0,.55));}
html[data-theme="light"] .theme-logo-mark{filter:none !important}


/* 2026-10-03 restore header/footer combined logo; keep split hero */
.brand img{height:42px;width:auto;display:block}
.footer-brand{display:inline-flex;align-items:center;gap:14px}
.footer-brand>img{height:30px;width:auto;display:block}
@media(max-width:800px){.brand img{height:34px}.footer-brand>img{height:24px}}