/* ===== Vertex Labs design system ===== */
:root{
  --black:#05070A;--deep:#0A0F14;--surface:#101820;--surface2:#151F29;
  --white:#F5F7FA;--muted:#94A3B8;--line:rgba(148,163,184,.16);
  --cyan:#22D3EE;--blue:#3B82F6;--violet:#8B5CF6;--green:#22C55E;
  --display:'Sora',system-ui,sans-serif;--body:'Instrument Sans',system-ui,sans-serif;
  --mx:50%;--my:30%;
}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{background:var(--black);color:var(--white);font-family:var(--body);line-height:1.65;overflow-x:hidden;
  background-image:linear-gradient(rgba(34,211,238,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(34,211,238,.035) 1px,transparent 1px);background-size:56px 56px}
body::before{content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background:radial-gradient(500px circle at var(--mx) var(--my),rgba(34,211,238,.09),transparent 70%)}
main,footer,nav{position:relative;z-index:1}
h1,h2,h3,h4{font-family:var(--display);letter-spacing:-.02em;line-height:1.1}
h1{font-size:clamp(2.6rem,6vw,5rem);font-weight:700}
h2{font-size:clamp(2rem,4vw,3.2rem);font-weight:600;margin-bottom:1rem}
p{color:var(--muted);max-width:62ch}
a{color:inherit}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:4px}
.section{padding:7rem 0;position:relative}
.alt{background:linear-gradient(180deg,var(--deep),var(--black))}
.tag{font-size:.78rem;color:var(--cyan);letter-spacing:.08em;display:inline-flex;gap:.5rem;align-items:center;margin-bottom:1.2rem}
.tag.v{color:var(--violet)}
.mono{font-family:ui-monospace,Consolas,monospace}

/* nav */
.vnav{position:fixed;top:0;left:0;right:0;z-index:1030;padding:1.3rem 0;transition:.35s;border-bottom:1px solid transparent}
.vnav.compact{padding:.6rem 0;background:rgba(5,7,10,.82);backdrop-filter:blur(14px);border-color:var(--line)}
.logo{display:flex;align-items:center;gap:.7rem;text-decoration:none;font-family:var(--display);font-weight:600;letter-spacing:.14em;font-size:.9rem}
.logo b{display:grid;place-items:center;width:34px;height:34px;border:1px solid var(--cyan);color:var(--cyan);border-radius:8px;letter-spacing:0}
.vnav .nav-link{color:var(--muted);position:relative;padding:.4rem .9rem}
.vnav .nav-link::after{content:"";position:absolute;left:.9rem;right:.9rem;bottom:0;height:2px;background:var(--cyan);transform:scaleX(0);transition:.3s}
.vnav .nav-link:hover,.vnav .nav-link.active{color:var(--white)}
.vnav .nav-link.active::after{transform:scaleX(1)}
.offcanvas{background:var(--deep);border-left:1px solid var(--cyan)}
.offcanvas .nav-link{font-family:var(--display);font-size:1.5rem;color:var(--white);border-bottom:1px solid var(--line);padding:1rem 0}

/* buttons */
.btn-v{display:inline-flex;align-items:center;gap:.6rem;padding:.85rem 1.5rem;border-radius:10px;border:1px solid var(--cyan);color:var(--white);background:transparent;font-weight:600;text-decoration:none;transition:.3s}
.btn-v i{transition:transform .3s}
.btn-v:hover{color:var(--black);background:var(--cyan);box-shadow:0 0 28px rgba(34,211,238,.35)}
.btn-v:hover i{transform:translate(3px,-3px)}
.btn-v.down:hover i{transform:translateY(3px)}
.btn-fill{background:var(--cyan);color:var(--black)}
.btn-fill:hover{background:var(--white);border-color:var(--white)}
.btn-ghost{border-color:var(--line)}

/* hero */
.hero{min-height:100vh;display:flex;align-items:center;padding:7rem 0 3rem;overflow:hidden}
.hero p{font-size:1.15rem;margin:1.5rem 0 2rem}
#core{width:100%;max-width:640px;margin:auto;display:block;overflow:visible}
.ring{fill:none;stroke:var(--line);stroke-dasharray:3 9}
.ring.r0{stroke:rgba(34,211,238,.4)}
.r1{animation:spin 60s linear infinite;transform-origin:300px 300px}
.r2{animation:spin 90s linear infinite reverse;transform-origin:300px 300px}
@keyframes spin{to{transform:rotate(360deg)}}
.link{stroke:rgba(59,130,246,.35);stroke-width:1.2;fill:none;transition:.3s}
.link.on{stroke:var(--cyan);stroke-width:2.5}
.node{cursor:pointer;outline:none}
.node circle{fill:var(--surface);stroke:var(--c);stroke-width:1.5;transition:.3s;transform-box:fill-box;transform-origin:center}
.node text{fill:var(--muted);font:600 10px var(--display);letter-spacing:.08em;text-anchor:middle;transition:.3s}
.node:hover circle,.node:focus-visible circle{transform:scale(1.35);fill:var(--c);fill-opacity:.25}
.node:hover text,.node:focus-visible text{fill:var(--white)}
.core-info{fill:var(--cyan);font:500 13px var(--body)}
.pulse{animation:pulse 3s ease-in-out infinite;transform-origin:300px 300px}
@keyframes pulse{50%{transform:scale(1.12);opacity:.6}}

/* status */
.status{border-block:1px solid var(--line);background:rgba(10,15,20,.8);font-size:.78rem;position:relative;z-index:1}
.status .item{display:flex;align-items:center;gap:.6rem;padding:.9rem 1.4rem;color:var(--muted)}
.dot{width:8px;height:8px;border-radius:50%;background:var(--green);box-shadow:0 0 10px var(--green)}
.dot.dev{background:var(--blue);box-shadow:0 0 10px var(--blue)}
.dot.res{background:var(--violet);box-shadow:0 0 10px var(--violet)}

/* systems */
.sys{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:2rem;height:100%;cursor:pointer;transition:.35s;position:relative;overflow:hidden;text-align:left;color:inherit;width:100%}
.sys:hover{border-color:var(--cyan);box-shadow:0 0 40px rgba(34,211,238,.12);transform:translateY(-4px)}
.sys .ic{font-size:1.6rem;color:var(--cyan)}
.sys h3{font-size:1.5rem;margin:.8rem 0 .4rem}
.badge-s{font-size:.68rem;padding:.2rem .6rem;border:1px solid var(--green);color:var(--green);border-radius:99px}
.badge-s.c{border-color:var(--violet);color:var(--violet)}
.badge-s.d{border-color:var(--blue);color:var(--blue)}
.flow{display:flex;flex-wrap:wrap;align-items:center;gap:.4rem;margin-top:1.4rem;position:relative}
.flow span{font-size:.72rem;padding:.3rem .65rem;border:1px solid var(--line);border-radius:6px;background:var(--surface2);color:var(--white)}
.flow i{color:var(--cyan);font-size:.7rem;animation:nudge 1.6s infinite}
.flow i:nth-child(4n){animation-delay:.4s}.flow i:nth-child(6n){animation-delay:.8s}
@keyframes nudge{50%{transform:translateX(3px);opacity:.4}}
.modal-content{background:var(--deep);border:1px solid var(--cyan);border-radius:18px}
.modal .flow.big{flex-direction:column;align-items:flex-start}
.modal .flow.big i{transform:rotate(90deg)}

/* AI */
#aisvg{width:100%;height:auto}
.aipath{stroke:var(--cyan);stroke-width:2;fill:none;stroke-dasharray:6 8;animation:dash 1.2s linear infinite}
@keyframes dash{to{stroke-dashoffset:-14}}
.ainode rect{fill:var(--surface);stroke:var(--violet)}
.ainode text{fill:var(--white);font:600 13px var(--display);text-anchor:middle}
.term{background:var(--black);border:1px solid var(--line);border-radius:14px;overflow:hidden}
.term header{display:flex;gap:.4rem;padding:.7rem 1rem;border-bottom:1px solid var(--line);color:var(--muted);font-size:.75rem;align-items:center}
.term pre{margin:0;padding:1.2rem;color:var(--cyan);font-size:.85rem;min-height:210px;white-space:pre-wrap}
.chip{display:inline-flex;gap:.4rem;align-items:center;font-size:.75rem;border:1px solid var(--line);border-radius:6px;padding:.25rem .6rem;color:var(--muted);margin:.2rem}

/* future, principles, founder */
.fut{border-top:1px solid var(--line);padding:2.5rem 0}
.fut .big{font-size:3rem;color:var(--blue)}
.pr{border-left:2px solid var(--cyan);padding-left:1.5rem;height:100%}
.pr i{font-size:1.8rem;color:var(--cyan)}
.ph{aspect-ratio:4/5;border:1px solid var(--line);border-radius:18px;background:repeating-linear-gradient(45deg,var(--surface),var(--surface) 10px,var(--surface2) 10px,var(--surface2) 20px);display:grid;place-items:center;color:var(--muted);overflow:hidden;max-width:360px}
.ph img{width:100%;height:100%;object-fit:cover}
.tl{position:relative;padding-left:2rem;border-left:1px solid var(--line)}
.tl .fill{position:absolute;left:-1px;top:0;width:2px;height:0;background:var(--cyan);box-shadow:0 0 12px var(--cyan)}
.tl div{padding:.6rem 0;color:var(--muted);transition:.4s}
.tl div.on{color:var(--white)}
.tl div::before{content:"";position:absolute;left:-5px;width:9px;height:9px;border-radius:50%;background:var(--black);border:1px solid var(--muted);margin-top:.6rem}
.tl div.on::before{border-color:var(--cyan);background:var(--cyan)}

/* form */
.form-control,.form-select{background:var(--surface);border:1px solid var(--line);color:var(--white);padding:.85rem 1rem;border-radius:10px}
.form-control:focus{background:var(--surface2);color:var(--white);border-color:var(--cyan);box-shadow:0 0 0 3px rgba(34,211,238,.18)}
.form-label{font-size:.85rem;color:var(--muted)}
footer{border-top:1px solid var(--line);padding:3rem 0;background:var(--deep)}
footer a{color:var(--muted);text-decoration:none;margin-right:1.2rem}footer a:hover{color:var(--cyan)}

/* motion helpers */
.rv{opacity:0;transform:translateY(24px);transition:.8s cubic-bezier(.2,.7,.2,1)}
.rv.in{opacity:1;transform:none}
#cur{position:fixed;width:14px;height:14px;border:1.5px solid var(--cyan);border-radius:50%;pointer-events:none;z-index:2000;transform:translate(-50%,-50%);transition:width .25s,height .25s,background .25s;display:none}
#cur.big{width:44px;height:44px;background:rgba(34,211,238,.1)}
@media (hover:hover) and (pointer:fine){#cur{display:block}}
@media (max-width:767px){.section{padding:4.5rem 0}.hero{padding-top:6rem}}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}html{scroll-behavior:auto}.rv{opacity:1;transform:none}}

/* ===== SEO content + mobile polish (Oct 2026) ===== */
#overview{background:linear-gradient(180deg,var(--black),var(--deep));border-top:1px solid var(--line)}
#overview h2{font-size:clamp(1.5rem,5vw,2.2rem);margin:2.8rem 0 1rem;padding-top:1.8rem;border-top:1px solid var(--line)}
#overview .container>h2:first-child{margin-top:0;padding-top:0;border-top:0}
#overview h3{font-size:clamp(1.05rem,3.4vw,1.25rem);font-weight:600;color:var(--white);margin:1.6rem 0 .4rem;border-left:2px solid var(--cyan);padding-left:.8rem}
#overview p{font-size:1rem;line-height:1.75;max-width:70ch;margin-bottom:.9rem}
#overview a{color:var(--cyan);text-decoration:underline;text-decoration-color:rgba(34,211,238,.4);text-underline-offset:3px}
#overview a:hover{text-decoration-color:var(--cyan)}
#overview ul{list-style:none;padding:0;margin:0;display:grid;gap:.75rem}
#overview li{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:1rem 1.15rem;color:var(--muted);line-height:1.6}
#overview li a{display:inline-block;font-weight:600;padding:.15rem 0}
#overview details.faq{background:var(--surface);border:1px solid var(--line);border-radius:12px;margin-bottom:.7rem}
#overview details.faq[open]{border-color:rgba(34,211,238,.4)}
#overview details.faq summary{cursor:pointer;list-style:none;position:relative;min-height:48px;padding:1rem 3rem 1rem 1.15rem;font:600 1rem var(--display);color:var(--white)}
#overview details.faq summary::-webkit-details-marker{display:none}
#overview details.faq summary::after{content:"+";position:absolute;right:1.1rem;top:50%;transform:translateY(-50%);color:var(--cyan);font-size:1.4rem;line-height:1}
#overview details.faq[open] summary::after{content:"\2212"}
#overview details.faq p{padding:0 1.15rem 1rem;margin:0}
@media (min-width:768px){#overview ul{grid-template-columns:1fr 1fr}}
@media (max-width:767.98px){
  #overview{padding:3rem 0!important}
  #about .row.g-5{--bs-gutter-y:1.25rem}
  #about .ph{max-width:240px;margin-inline:auto}
  #about .col-md-8{text-align:center}
  #about .col-md-8 p{margin-inline:auto}
  #about .tag{justify-content:center}
  #about .container>.row+.row{margin-top:2.2rem!important;padding-top:2rem;border-top:1px solid var(--line)}
}

/* Fix: Bootstrap g-5 rows overflow the container on phones (Oct 2026) */
@media (max-width:575.98px){.row.g-5{--bs-gutter-x:1.5rem}}

/* ===== Phone fixes: no sideways scroll, smaller type and photos (Oct 2026) ===== */
html,body{max-width:100%;overflow-x:hidden}
@supports (overflow:clip){html,body{overflow-x:clip}}
h1,h2,h3,h4,p,li{overflow-wrap:break-word}
img,svg,video{max-width:100%}

@media (max-width:575.98px){
  .row.g-5{--bs-gutter-x:1.5rem;--bs-gutter-y:1.5rem}
  .section{padding:3.2rem 0}
  .hero{padding:5.5rem 0 2rem;min-height:auto}
  h1{font-size:1.9rem;line-height:1.15}
  h2{font-size:1.45rem;margin-bottom:.7rem}
  h3.h4,.h4{font-size:1.05rem}
  p{font-size:.93rem;line-height:1.6}
  .hero p{font-size:.98rem;margin:1rem 0 1.4rem}
  .tag{font-size:.7rem;margin-bottom:.8rem}
  .logo{font-size:.78rem;letter-spacing:.1em}
  .logo b{width:28px;height:28px}
  .btn-v{padding:.65rem 1.1rem;font-size:.9rem}
  .sys{padding:1.25rem}
  .sys h3{font-size:1.2rem}
  .fut{padding:1.5rem 0}
  .fut .big{font-size:2rem}
  .pr i{font-size:1.4rem}
  .chip{font-size:.68rem;padding:.2rem .5rem}
  .form-control,.form-select{padding:.7rem .85rem}
  #core{max-width:300px}
  #about .ph{max-width:150px}
  #overview h2{font-size:1.3rem;margin:2rem 0 .8rem;padding-top:1.4rem}
  #overview h3{font-size:.98rem;margin:1.2rem 0 .3rem}
  #overview p,#overview li{font-size:.9rem}
  #overview details.faq summary{font-size:.92rem;padding:.85rem 2.6rem .85rem 1rem}
}

/* ===== Overview redesign: cards, products, FAQ (Oct 2026) ===== */
.ov-head{max-width:740px;margin-bottom:1rem}
.ov-head p{font-size:1.05rem;max-width:none}
.ov-sub{font-size:clamp(1.35rem,3vw,1.9rem);margin:3rem 0 1.5rem}
.card-v{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:1.75rem;height:100%;position:relative;transition:.35s}
.card-v:hover{border-color:var(--cyan);box-shadow:0 0 40px rgba(34,211,238,.12);transform:translateY(-4px)}
.card-v .ic{font-size:1.6rem;color:var(--cyan)}
.card-v .top{display:flex;justify-content:space-between;align-items:center}
.card-v h3{font-size:1.3rem;margin:.9rem 0 .5rem;color:var(--white)}
.card-v h3 a{color:inherit;text-decoration:none}
.card-v .stretch::after{content:"";position:absolute;inset:0;border-radius:18px}
.card-v p{font-size:.95rem;margin:0}
.card-v .go{display:inline-flex;gap:.4rem;align-items:center;margin-top:1.1rem;color:var(--cyan);font-weight:600;font-size:.92rem}
.card-v:hover .go{color:var(--white)}
.card-v.soon{border-style:dashed;border-color:rgba(139,92,246,.45)}
.card-v.soon .ic{color:var(--violet)}
.card-v.soon p{max-width:70ch}
details.faq{background:var(--surface);border:1px solid var(--line);border-radius:14px;margin-bottom:.75rem;transition:.3s}
details.faq[open]{border-color:rgba(34,211,238,.4)}
details.faq summary{cursor:pointer;list-style:none;position:relative;min-height:48px;padding:1rem 3rem 1rem 1.25rem;font:600 1rem var(--display);color:var(--white)}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::after{content:"+";position:absolute;right:1.1rem;top:50%;transform:translateY(-50%);color:var(--cyan);font-size:1.4rem;line-height:1}
details.faq[open] summary::after{content:"\2212"}
details.faq p{padding:0 1.25rem 1.1rem;margin:0;max-width:none}
@media (max-width:575.98px){
  .ov-sub{margin:2rem 0 1rem}
  .card-v{padding:1.25rem}
  .card-v h3{font-size:1.1rem}
  .card-v p{font-size:.9rem}
  details.faq summary{font-size:.92rem;padding:.85rem 2.6rem .85rem 1rem}
  details.faq p{padding:0 1rem .9rem;font-size:.9rem}
}

/* ===== Polish pass (Oct 2026) ===== */
html{color-scheme:dark;scrollbar-width:thin;scrollbar-color:#22303d var(--black)}
::selection{background:rgba(34,211,238,.28);color:var(--white)}
body{-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
h1,h2,h3{text-wrap:balance}
p,li{text-wrap:pretty}

/* hero */
.hero{background:radial-gradient(900px circle at 82% 18%,rgba(59,130,246,.13),transparent 60%),radial-gradient(700px circle at 8% 92%,rgba(139,92,246,.09),transparent 60%)}
h1{background:linear-gradient(120deg,#fff 45%,var(--cyan) 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
@media (min-width:992px){#core{filter:drop-shadow(0 0 40px rgba(34,211,238,.14))}}

/* headings and section labels */
.section h2{background:linear-gradient(100deg,var(--white) 55%,#9be7f5 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.tag{padding:.3rem .8rem;border:1px solid rgba(34,211,238,.25);border-radius:99px;background:rgba(34,211,238,.06)}
.tag.v{border-color:rgba(139,92,246,.32);background:rgba(139,92,246,.07)}
.section::before{content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);width:min(960px,86%);height:1px;background:linear-gradient(90deg,transparent,rgba(34,211,238,.35),transparent);pointer-events:none}

/* cards */
.sys,.card-v{box-shadow:inset 0 1px 0 rgba(255,255,255,.04)}
.pr{transition:border-color .3s}
.pr:hover{border-left-color:var(--violet)}
.chip{transition:.25s}
.chip:hover{border-color:var(--cyan);color:var(--white)}

/* founder portraits */
.ph{border-color:rgba(34,211,238,.25);box-shadow:0 0 0 6px rgba(34,211,238,.04),0 24px 60px -24px rgba(0,0,0,.85);transition:.4s}
.ph:hover{border-color:var(--cyan);box-shadow:0 0 0 6px rgba(34,211,238,.08),0 0 50px rgba(34,211,238,.16)}
.ph img{transition:transform .6s}
.ph:hover img{transform:scale(1.03)}

/* buttons */
.btn-fill{background:linear-gradient(135deg,var(--cyan),#38bdf8);border-color:transparent;box-shadow:0 8px 28px -8px rgba(34,211,238,.55)}
.btn-v:active{transform:translateY(1px)}

/* form */
.form-control::placeholder{color:rgba(148,163,184,.55)}
.form-control:hover{border-color:rgba(34,211,238,.35)}
textarea.form-control{min-height:120px;resize:vertical}

/* footer */
footer{position:relative}
footer::before{content:"";position:absolute;top:-1px;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,var(--cyan),transparent);opacity:.5}

/* phones */
@media (max-width:767.98px){
  .status .container{flex-wrap:nowrap!important;overflow-x:auto;scrollbar-width:none}
  .status .container::-webkit-scrollbar{display:none}
  .status .item{white-space:nowrap;flex:0 0 auto;padding:.75rem 1rem}
  #cform .btn-v{width:100%;justify-content:center}
}
@media (max-width:575.98px){
  .tag{padding:.25rem .65rem}
}