/* Robotechub — dark theme only, responsive layout */
:root{
  --bg0:#070A12;
  --bg1:#0B1020;
  --card:rgba(255,255,255,.06);
  --card2:rgba(255,255,255,.08);
  --border:rgba(255,255,255,.12);
  --text:#EAF0FF;
  --muted:rgba(234,240,255,.72);
  --muted2:rgba(234,240,255,.55);
  --brand1:#6D5EF6;
  --brand2:#10C7FF;
  --accent:#FF8A3D;
  --ok:#35D07F;
  --shadow: 0 18px 60px rgba(0,0,0,.45);
  --radius: 18px;
  --radius2: 14px;
  --container: 1140px;
  --ring: 0 0 0 4px rgba(16,199,255,.22);
  --tap: 44px;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial, "Noto Sans", "Apple Color Emoji","Segoe UI Emoji";
}

*{box-sizing:border-box}
html,body{height:100%}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font);
  color:var(--text);
  line-height:1.55;
  background: radial-gradient(1200px 600px at 20% -10%, rgba(109,94,246,.45), transparent 60%),
              radial-gradient(900px 500px at 80% 0%, rgba(16,199,255,.32), transparent 55%),
              linear-gradient(180deg, var(--bg0), var(--bg1));
}
body.nav-open{overflow:hidden}

a{color:inherit; text-decoration:none}
img{max-width:100%; height:auto}

.container{max-width:var(--container); margin:0 auto; padding:0 16px}
@media (min-width: 480px){
  .container{padding:0 22px}
}
.section{padding:72px 0}
.section.tight{padding:52px 0}
.grid{display:grid; gap:18px}
.grid.cols-2{grid-template-columns:repeat(2, minmax(0,1fr))}
.grid.cols-3{grid-template-columns:repeat(3, minmax(0,1fr))}
.grid.cols-4{grid-template-columns:repeat(4, minmax(0,1fr))}

@media (max-width: 980px){
  .grid.cols-4{grid-template-columns:repeat(2, minmax(0,1fr))}
}
@media (max-width: 720px){
  .section{padding:56px 0}
  .grid.cols-3,.grid.cols-2,.grid.cols-4{grid-template-columns:1fr}
}

.topbar{
  position:sticky; top:0; z-index:40;
  backdrop-filter: blur(12px);
  background: color-mix(in oklab, var(--bg1) 72%, transparent);
  border-bottom:1px solid var(--border);
}
.topbar-inner{position:relative}
.nav{
  display:flex; align-items:center; justify-content:space-between;
  gap:12px;
  padding:12px 0;
  min-height: calc(var(--tap) + 8px);
}
.brand{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:0;
  font-weight:800;
  letter-spacing:.2px;
  background:#ffffff;
  padding:8px 14px;
  border-radius:14px;
  border:1px solid rgba(255,255,255,.22);
  box-shadow:0 4px 18px rgba(0,0,0,.22);
  flex-shrink:0;
}
.brand:hover{
  border-color:color-mix(in oklab, var(--brand2) 45%, rgba(255,255,255,.35));
}
.brand-logo{
  height:46px;
  width:auto;
  max-width:min(200px, 46vw);
  object-fit:contain;
  display:block;
}
.footer .brand{
  padding:6px 10px;
  border-radius:12px;
  box-shadow:0 2px 12px rgba(0,0,0,.18);
}
.brand-logo--footer{
  height:40px;
  max-width:200px;
}
.nav-burger{
  display:none;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:var(--tap);
  height:var(--tap);
  padding:0;
  margin-left:auto;
  border:1px solid var(--border);
  border-radius:14px;
  background:var(--card);
  color:var(--text);
  cursor:pointer;
  flex-shrink:0;
  -webkit-appearance:none;
  appearance:none;
}
.nav-burger:focus{outline:none; box-shadow:var(--ring)}
.nav-burger:focus-visible{outline:2px solid var(--brand2); outline-offset:2px}
.nav-burger-bar{
  display:block;
  width:20px;
  height:2px;
  margin:0 auto;
  border-radius:2px;
  background:currentColor;
}
body.nav-open .nav-burger .nav-burger-bar:nth-child(1){transform:translateY(7px) rotate(45deg)}
body.nav-open .nav-burger .nav-burger-bar:nth-child(2){opacity:0}
body.nav-open .nav-burger .nav-burger-bar:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.nav-burger-bar{transition:transform .2s ease, opacity .2s ease}

.nav-cluster{
  display:flex;
  align-items:center;
  gap:14px;
  flex-wrap:nowrap;
  justify-content:flex-end;
  flex:1;
  min-width:0;
}
@media (min-width: 901px) and (max-width: 1180px){
  .nav-cluster{gap:10px}
  .navlinks a{padding:8px 10px; font-size:14px}
}
.navlinks{display:flex; gap:4px; align-items:center; flex-wrap:nowrap; flex:0 1 auto; min-width:0}
.navlinks a{
  padding:10px 12px; border-radius:12px; color:var(--muted);
  border:1px solid transparent;
  min-height:var(--tap);
  display:inline-flex; align-items:center;
  white-space:nowrap;
  flex-shrink:0;
}
.navlinks a:hover{color:var(--text); border-color:var(--border); background:var(--card)}
.navlinks a.active{color:var(--text); border-color:color-mix(in oklab, var(--brand2) 55%, var(--border)); background:var(--card2)}
.navactions{display:flex; gap:10px; align-items:center; flex-shrink:0; margin-left:4px}
.navactions .btn{
  min-height:var(--tap);
  padding-left:16px;
  padding-right:16px;
  white-space:nowrap;
}

.nav-scrim{
  display:none;
  position:fixed;
  inset:0;
  z-index:44;
  margin:0;
  padding:0;
  border:0;
  -webkit-appearance:none;
  appearance:none;
  background:transparent;
  cursor:default;
  opacity:0;
  pointer-events:none;
  transition:opacity .2s ease;
}
body.nav-open .nav-scrim{
  display:block;
  opacity:1;
  pointer-events:auto;
  cursor:pointer;
  background:rgba(0,0,0,.55);
}

@media (max-width: 900px){
  .nav-burger{display:inline-flex}
  .nav-cluster{
    position:fixed;
    top:0;
    right:0;
    bottom:0;
    width:min(320px, 88vw);
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    flex-wrap:nowrap;
    flex:none;
    padding:calc(env(safe-area-inset-top, 0px) + var(--tap) + 20px) max(18px, env(safe-area-inset-right, 0px)) 24px max(18px, env(safe-area-inset-left, 0px));
    margin:0;
    background:color-mix(in oklab, var(--bg1) 96%, black);
    border-left:1px solid var(--border);
    box-shadow: var(--shadow);
    transform:translateX(100%);
    transition:transform .28s ease;
    z-index:46;
    overflow-y:auto;
    overscroll-behavior:contain;
    gap:16px;
  }
  body.nav-open .nav-cluster{
    transform:translateX(0);
  }
  .nav-cluster .navlinks{
    flex-direction:column;
    align-items:stretch;
    width:100%;
    gap:4px;
  }
  .nav-cluster .navlinks a{
    width:100%;
    border-radius:14px;
  }
  .nav-cluster .navactions{
    flex-direction:column;
    width:100%;
    margin-top:auto;
    padding-top:8px;
    border-top:1px solid var(--border);
  }
  .nav-cluster .navactions .btn{width:100%; justify-content:center}
}

.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:10px;
  border-radius:14px; padding:11px 14px;
  border:1px solid var(--border);
  background:var(--card);
  color:var(--text);
  box-shadow: none;
  transition: transform .15s ease, background .15s ease, border-color .15s ease;
}
.btn:hover{transform: translateY(-1px); background:var(--card2)}
.btn:focus{outline:none; box-shadow:var(--ring)}
.btn.primary{
  border-color:color-mix(in oklab, var(--brand2) 55%, var(--border));
  background: linear-gradient(135deg, rgba(109,94,246,.95), rgba(16,199,255,.78));
}
.btn.primary:hover{filter:saturate(1.06)}
.btn.ghost{background:transparent}
.btn.small{padding:9px 11px; border-radius:12px}

.hero{
  padding:clamp(40px, 6vw, 64px) 0 clamp(20px, 4vw, 30px);
}
.hero-wrap{
  display:grid; gap:18px;
  grid-template-columns: 1.25fr .75fr;
  align-items:stretch;
}
@media (max-width: 900px){
  .hero-wrap{grid-template-columns:1fr}
}
.hero h1{
  margin:0;
  font-size: clamp(34px, 5vw, 54px);
  line-height:1.08;
  letter-spacing:-.5px;
}
.hero-banner{
  position:relative;
  min-height: clamp(280px, 52vw, 420px);
  border-radius: clamp(16px, 3vw, 24px);
  overflow:hidden;
  border:1px solid color-mix(in oklab, var(--brand2) 30%, var(--border));
  background: color-mix(in oklab, var(--bg1) 55%, transparent);
  box-shadow: var(--shadow);
}
.hero-banner img{
  position:absolute; inset:0;
  width:100%; height:100%;
  object-fit: cover;
  opacity:0;
  transform: scale(1.02);
  transition: opacity .45s ease, transform .75s ease;
}
.hero-banner img.active{
  opacity:1;
  transform: scale(1);
}
.hero-banner::after{
  content:"";
  position:absolute; inset:0;
  background: linear-gradient(90deg,
    rgba(7,10,18,.82) 0%,
    rgba(7,10,18,.52) 42%,
    transparent 78%);
}
.hero-overlay{
  position:relative;
  z-index:2;
  padding:clamp(16px, 4vw, 26px);
  max-width: 720px;
  color:#fff;
}
.hero-overlay h1{color:#fff}
.hero-overlay .lead{color:rgba(255,255,255,.9)}
.hero-overlay .eyebrow{color:rgba(255,255,255,.78)}
.hero-overlay .pill{color:rgba(255,255,255,.88); border-color:rgba(255,255,255,.28); background:rgba(0,0,0,.22)}
.hero-overlay .pill strong{color:#fff}
.hero-controls{
  position:absolute;
  z-index:3;
  left:clamp(10px, 3vw, 16px);
  right:clamp(10px, 3vw, 16px);
  bottom:clamp(10px, 2vw, 14px);
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
  flex-wrap:wrap;
}
.dots{display:flex; gap:8px; align-items:center}
.dot{
  width:10px; height:10px; border-radius:999px;
  border:1px solid var(--border);
  background: color-mix(in oklab, var(--bg1) 60%, transparent);
  cursor:pointer;
  padding:0;
}
.dot.active{
  width:22px;
  background: linear-gradient(135deg, var(--brand1), var(--brand2));
  border-color: color-mix(in oklab, var(--brand2) 50%, var(--border));
}
.hero-arrows{display:flex; gap:10px}
.iconbtn{
  width:var(--tap);height:var(--tap);
  border-radius:14px;
  border:1px solid var(--border);
  background: color-mix(in oklab, var(--bg1) 55%, transparent);
  color:var(--text);
  display:grid; place-items:center;
  cursor:pointer;
  transition: transform .15s ease, background .15s ease, border-color .15s ease;
}
.iconbtn:hover{transform: translateY(-1px); background: var(--card2); border-color: color-mix(in oklab, var(--brand2) 35%, var(--border))}
.iconbtn:focus{outline:none; box-shadow: var(--ring)}
.iconbtn svg{width:18px;height:18px}

.cert-grid{display:grid; gap:14px; grid-template-columns:repeat(4, minmax(0,1fr))}
@media (max-width: 980px){ .cert-grid{grid-template-columns:repeat(2, minmax(0,1fr))} }
@media (max-width: 720px){ .cert-grid{grid-template-columns:1fr} }
.cert-card{
  border:1px solid var(--border);
  background: color-mix(in oklab, var(--bg1) 55%, transparent);
  border-radius: var(--radius);
  overflow:hidden;
  transition: transform .15s ease, border-color .15s ease, background .15s ease;
}
.cert-card:hover{transform: translateY(-2px); border-color: color-mix(in oklab, var(--brand2) 40%, var(--border)); background: color-mix(in oklab, var(--bg1) 65%, transparent)}
.cert-thumb{
  aspect-ratio: 4 / 5;
  background: var(--card);
}
.cert-thumb img{width:100%; height:100%; object-fit: cover; display:block}
.cert-body{padding:12px 12px 14px}
.cert-body h3{margin:0; font-size:15px}
.cert-body p{margin:6px 0 0; color:var(--muted); font-size:13.5px}
.cert-actions{display:flex; gap:10px; flex-wrap:wrap; margin-top:10px}

.modal{
  position:fixed; inset:0;
  background: rgba(0,0,0,.72);
  display:none;
  z-index:1000;
  padding:22px;
}
.modal.open{display:flex}
.modal-panel{
  margin:auto;
  max-width: 980px;
  width: 100%;
  border-radius: 20px;
  overflow:hidden;
  border:1px solid rgba(255,255,255,.16);
  background: color-mix(in oklab, var(--bg1) 85%, transparent);
  box-shadow: var(--shadow);
}
.modal-head{
  display:flex; justify-content:space-between; align-items:center;
  padding:12px 14px;
  border-bottom:1px solid var(--border);
}
.modal-title{font-weight:800; color:var(--text)}
.modal-body{padding:14px}
.modal-body img{
  width:100%;
  height:auto;
  max-height:min(85vh, 1200px);
  object-fit:contain;
  border-radius:14px;
  border:1px solid var(--border);
  background: var(--card);
  user-select:none;
  -webkit-user-drag:none;
}
.cert-thumb img{
  user-select:none;
  -webkit-user-drag:none;
}
.grad{
  background: linear-gradient(135deg, var(--brand2), var(--brand1), var(--accent));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.lead{margin:12px 0 0; color:var(--muted); font-size: 16.5px; max-width: 62ch}
.hero-cta{display:flex; gap:12px; margin-top:18px; flex-wrap:wrap}
.hero-cta .btn{min-height:var(--tap)}
.kpis{display:grid; gap:12px}
.card{
  border:1px solid var(--border);
  background: linear-gradient(180deg, color-mix(in oklab, var(--card) 92%, transparent), color-mix(in oklab, var(--card2) 92%, transparent));
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.card.pad{padding:18px}
.kpi{
  padding:16px; border-radius: var(--radius2);
  border:1px solid var(--border);
  background: color-mix(in oklab, var(--bg1) 55%, transparent);
}
.kpi .num{font-weight:900; font-size:20px}
.kpi .lbl{color:var(--muted2); font-size:13px}

.eyebrow{color:var(--muted2); text-transform:uppercase; letter-spacing:.16em; font-size:12px}
.h2{margin:8px 0 0; font-size: clamp(24px, 3.2vw, 34px); letter-spacing:-.2px}
.sub{margin:10px 0 0; color:var(--muted); max-width: 72ch}

.feature{
  padding:16px; border-radius: var(--radius2);
  border:1px solid var(--border);
  background: color-mix(in oklab, var(--bg1) 50%, transparent);
  transition: transform .15s ease, border-color .15s ease, background .15s ease;
}
.feature:hover{transform: translateY(-2px); border-color: color-mix(in oklab, var(--brand2) 40%, var(--border)); background: color-mix(in oklab, var(--bg1) 62%, transparent)}
.icon{
  width:40px;height:40px;border-radius:14px;
  background: linear-gradient(135deg, color-mix(in oklab, var(--brand1) 75%, transparent), color-mix(in oklab, var(--brand2) 65%, transparent));
  display:grid; place-items:center;
  border:1px solid color-mix(in oklab, var(--brand2) 40%, var(--border));
}
.icon svg{width:20px;height:20px;color:var(--text)}
.feature h3{margin:12px 0 0; font-size:16px}
.feature p{margin:8px 0 0; color:var(--muted); font-size:14.5px}

.pillrow{display:flex; gap:10px; flex-wrap:wrap}
.pill{
  font-size:13px; color:var(--muted);
  border:1px solid var(--border);
  padding:7px 10px; border-radius:999px;
  background: color-mix(in oklab, var(--bg1) 55%, transparent);
}
.pill strong{color:var(--text); font-weight:700}

.cta-band{
  border:1px solid color-mix(in oklab, var(--brand2) 36%, var(--border));
  background: radial-gradient(700px 400px at 0% 0%, rgba(16,199,255,.25), transparent 55%),
              radial-gradient(700px 400px at 100% 0%, rgba(109,94,246,.28), transparent 60%),
              color-mix(in oklab, var(--bg1) 65%, transparent);
  border-radius: 22px;
  padding:22px;
}
.cta-band h3{margin:0; font-size: 20px}
.cta-band p{margin:8px 0 0; color:var(--muted); max-width: 70ch}
.cta-band .row{display:flex; justify-content:space-between; gap:16px; align-items:center; flex-wrap:wrap}

.footer{
  border-top:1px solid var(--border);
  background: color-mix(in oklab, var(--bg1) 70%, transparent);
  padding:28px 0;
}
.footergrid{display:grid; grid-template-columns: 1.25fr .75fr; gap:18px; align-items:start}
@media (max-width: 900px){ .footergrid{grid-template-columns:1fr} }
.footlinks{display:flex; gap:10px; flex-wrap:wrap}
.footlinks a{color:var(--muted); padding:8px 10px; border:1px solid transparent; border-radius:12px}
.footlinks a:hover{color:var(--text); border-color:var(--border); background:var(--card)}
.foot-social{display:flex; gap:10px; flex-wrap:wrap; margin-top:12px}
.foot-social a{color:var(--muted); padding:8px 10px; border:1px solid transparent; border-radius:12px; font-size:13px}
.foot-social a:hover{color:var(--text); border-color:var(--border); background:var(--card)}
.small{color:var(--muted2); font-size:13px}

.table{
  width:100%;
  border-collapse: separate;
  border-spacing:0;
  overflow:hidden;
  border:1px solid var(--border);
  border-radius: var(--radius);
  background: color-mix(in oklab, var(--bg1) 55%, transparent);
}
.table th,.table td{
  padding:12px 14px;
  border-bottom:1px solid var(--border);
  text-align:left;
  vertical-align:top;
  color:var(--muted);
  font-size:14px;
}
.table th{color:var(--text); font-size:13px; text-transform:uppercase; letter-spacing:.14em}
.table tr:last-child td{border-bottom:none}

.form{
  display:grid; gap:12px;
}
.field label{display:block; color:var(--muted2); font-size:13px; margin-bottom:6px}
.field input,.field textarea{
  width:100%;
  min-height:var(--tap);
  padding:11px 12px;
  border-radius:14px;
  border:1px solid var(--border);
  background: color-mix(in oklab, var(--bg1) 58%, transparent);
  color:var(--text);
  outline:none;
}
.field textarea{min-height:140px; resize:vertical}
.field input:focus,.field textarea:focus{box-shadow:var(--ring)}

.recaptcha-field .g-recaptcha{margin-top:4px}

.notice{
  display:none;
  padding:12px 12px;
  border-radius:14px;
  border:1px solid var(--border);
  background: color-mix(in oklab, var(--bg1) 58%, transparent);
  color:var(--muted);
}
.notice.ok{border-color: color-mix(in oklab, var(--ok) 55%, var(--border))}
.notice.bad{border-color: color-mix(in oklab, #ff4d4d 55%, var(--border))}

/* Transform-only reveal: opacity:0 on a parent blocks clicks on children in many browsers */
.reveal{
  opacity:1;
  transform:translateY(14px);
  transition: transform .5s cubic-bezier(.22,1,.36,1);
  will-change:transform;
}
.reveal.in{transform:none; will-change:auto}

.gif-grid{
  display:grid;
  gap:18px;
  grid-template-columns:repeat(2, minmax(0,1fr));
  margin-top:18px;
}
@media (min-width: 1200px){ .gif-grid{grid-template-columns:repeat(4, minmax(0,1fr))} }
@media (max-width: 720px){ .gif-grid{grid-template-columns:1fr} }
.gif-card{
  border:1px solid var(--border);
  border-radius: var(--radius);
  overflow:hidden;
  background: color-mix(in oklab, var(--bg1) 55%, transparent);
  box-shadow: var(--shadow);
}
.gif-card figcaption{
  padding:14px 16px 16px;
  border-top:1px solid var(--border);
}
.gif-card figcaption h3{margin:0; font-size:16px}
.gif-card figcaption p{margin:8px 0 0; color:var(--muted); font-size:14px}
.gif-wrap{
  position:relative;
  background:#0a0f1c;
  aspect-ratio: 16 / 10;
}
.gif-wrap img,.gif-wrap video{
  display:block;
  width:100%;
  height:100%;
  object-fit: contain;
}

.skip{
  position:absolute; left:-999px; top:10px;
  background:var(--bg1); border:1px solid var(--border); padding:10px 12px; border-radius:14px;
}
.skip:focus{left:10px; z-index:100}