/* =========================================================
   BOX ROBOTICS — design system
   Carbon dark · Signal Amber · Coolant Teal · blueprint grid
   ========================================================= */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

:root{
  --bg:#07090D;
  --bg-2:#0C1016;
  --panel:#10151D;
  --panel-2:#151B25;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.14);
  --text:#E8ECF2;
  --muted:#8B95A5;
  --dim:#5A6475;
  --amber:#FFB020;
  --amber-2:#FF8A00;
  --teal:#19E3B1;
  --teal-dim:rgba(25,227,177,.14);
  --red:#FF4D5E;
  --kraft:#C99A5B;
  --kraft-2:#A87C43;
  --radius:18px;
  --radius-sm:10px;
  --max:1240px;
  --font-h:'Space Grotesk',system-ui,sans-serif;
  --font-b:'Inter',system-ui,sans-serif;
  --font-m:'JetBrains Mono',ui-monospace,monospace;
  --shadow:0 30px 80px -30px rgba(0,0,0,.7);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--text);font-family:var(--font-b);
  font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,select,textarea{font:inherit;color:inherit}
::selection{background:var(--amber);color:#000}

/* blueprint grid backdrop */
.grid-bg{
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:48px 48px;
}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px}
section{position:relative}
.section{padding:120px 0}
.section-sm{padding:80px 0}

/* ---------- type ---------- */
h1,h2,h3,h4{font-family:var(--font-h);font-weight:600;letter-spacing:-.02em;line-height:1.08}
h1{font-size:clamp(2.6rem,6vw,5.2rem);letter-spacing:-.035em}
h2{font-size:clamp(2rem,4vw,3.3rem);letter-spacing:-.03em}
h3{font-size:1.35rem}
h4{font-size:1.05rem}
p{color:var(--muted)}
.lead{font-size:1.2rem;color:#B4BDCB;max-width:620px}
.mono{font-family:var(--font-m);font-size:.78rem;letter-spacing:.08em;text-transform:uppercase}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;font-family:var(--font-m);font-size:.75rem;
  letter-spacing:.14em;text-transform:uppercase;color:var(--amber);margin-bottom:22px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--amber)}
.amber{color:var(--amber)}
.teal{color:var(--teal)}
.grad{
  background:linear-gradient(100deg,var(--amber) 0%,#FFD27A 45%,var(--teal) 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.section-head{max-width:760px;margin-bottom:64px}
.section-head p{margin-top:18px;font-size:1.1rem}
.center{text-align:center;margin-left:auto;margin-right:auto}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;padding:14px 22px;border-radius:999px;
  font-weight:600;font-size:.95rem;transition:transform .2s,box-shadow .2s,background .2s,border-color .2s;
  white-space:nowrap;
}
.btn-primary{background:var(--amber);color:#111;box-shadow:0 10px 40px -10px rgba(255,176,32,.6)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 50px -12px rgba(255,176,32,.8)}
.btn-ghost{border:1px solid var(--line-2);background:rgba(255,255,255,.03)}
.btn-ghost:hover{border-color:var(--teal);color:var(--teal)}
.btn .arrow{transition:transform .2s}
.btn:hover .arrow{transform:translateX(4px)}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:50;transition:background .3s,border-color .3s;
  border-bottom:1px solid transparent;
}
.site-header.scrolled{background:rgba(7,9,13,.82);backdrop-filter:blur(16px);border-color:var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:76px}
.logo{display:flex;align-items:center;gap:12px;font-family:var(--font-h);font-weight:700;font-size:1.15rem;letter-spacing:-.01em}
.logo-mark{width:34px;height:34px}
.logo small{display:block;font-family:var(--font-m);font-size:.6rem;letter-spacing:.2em;color:var(--muted);font-weight:400;margin-top:-2px}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{padding:10px 16px;border-radius:999px;font-size:.92rem;color:#C2CAD6;transition:color .2s,background .2s}
.nav-links a:hover,.nav-links a.active{color:#fff;background:rgba(255,255,255,.06)}
.nav-cta{margin-left:12px}
.menu-btn{display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line-2);align-items:center;justify-content:center}
.menu-btn span{display:block;width:18px;height:2px;background:#fff;position:relative}
.menu-btn span::before,.menu-btn span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:#fff}
.menu-btn span::before{top:-6px}.menu-btn span::after{top:6px}

/* ---------- hero ---------- */
.hero{padding:150px 0 90px;overflow:hidden;min-height:100vh;display:flex;align-items:center}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(700px 500px at 78% 40%,rgba(25,227,177,.12),transparent 60%),
    radial-gradient(600px 500px at 15% 20%,rgba(255,176,32,.10),transparent 60%);
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  mask-image:radial-gradient(ellipse at center,#000 30%,transparent 75%);
  -webkit-mask-image:radial-gradient(ellipse at center,#000 30%,transparent 75%);
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:48px 48px;
}
.hero-grid{display:grid;grid-template-columns:1.02fr 1fr;gap:56px;align-items:center;position:relative;z-index:1}
.badge{
  display:inline-flex;align-items:center;gap:10px;padding:6px 14px 6px 6px;border-radius:999px;
  border:1px solid var(--line-2);background:rgba(255,255,255,.03);font-size:.85rem;color:#C2CAD6;margin-bottom:28px;
}
.badge b{background:var(--teal);color:#04120D;font-family:var(--font-m);font-size:.68rem;letter-spacing:.1em;padding:4px 9px;border-radius:999px}
.hero h1 .line{display:block}
.hero .lead{margin:26px 0 38px}
.hero-ctas{display:flex;gap:14px;flex-wrap:wrap}
.hero-meta{display:flex;gap:36px;margin-top:54px;padding-top:28px;border-top:1px solid var(--line)}
.hero-meta div{font-family:var(--font-h);font-size:1.9rem;font-weight:600}
.nav-links a.btn-primary,.nav-links a.btn-primary:hover{color:#111;background:var(--amber)}
.hero-meta .count{display:inline!important;font:inherit!important;color:inherit!important;letter-spacing:inherit!important;text-transform:none!important;margin:0!important}
.hero-meta span{display:block;font-family:var(--font-m);font-size:.68rem;letter-spacing:.12em;color:var(--muted);text-transform:uppercase;margin-top:4px}

.robot-stage{
  position:relative;border-radius:24px;border:1px solid var(--line-2);
  background:linear-gradient(180deg,rgba(21,27,37,.9),rgba(10,13,18,.9));box-shadow:var(--shadow);overflow:hidden;
}
.robot-stage .stage-top{
  display:flex;justify-content:space-between;align-items:center;padding:14px 18px;border-bottom:1px solid var(--line);
  font-family:var(--font-m);font-size:.7rem;letter-spacing:.1em;color:var(--muted);text-transform:uppercase;
}
.dot-live{display:inline-flex;align-items:center;gap:8px;color:var(--teal)}
.dot-live::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--teal);box-shadow:0 0 0 0 rgba(25,227,177,.6);animation:pulse 1.6s infinite}
@keyframes pulse{70%{box-shadow:0 0 0 10px rgba(25,227,177,0)}100%{box-shadow:0 0 0 0 rgba(25,227,177,0)}}
#robotSvg{width:100%;height:auto;aspect-ratio:600/320}
.telemetry{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line)}
.telemetry div{padding:14px 16px;border-right:1px solid var(--line)}
.telemetry div:last-child{border-right:0}
.telemetry span{display:block;font-family:var(--font-m);font-size:.62rem;letter-spacing:.12em;color:var(--dim);text-transform:uppercase}
.telemetry b{font-family:var(--font-h);font-size:1.25rem;font-weight:600}
.telemetry .bar{padding:0!important;border:0!important;height:4px;border-radius:4px;background:var(--line);margin-top:8px;overflow:hidden}
.telemetry .bar i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--amber),var(--teal));transition:width .3s}

/* ---------- marquee ---------- */
.marquee{border-top:1px solid var(--line);border-bottom:1px solid var(--line);overflow:hidden;padding:22px 0;background:var(--bg-2)}
.marquee-track{display:flex;gap:56px;width:max-content;animation:marquee 40s linear infinite}
.marquee-track span{display:flex;align-items:center;gap:14px;font-family:var(--font-h);font-size:1.15rem;color:#9AA4B4;white-space:nowrap}
.marquee-track span::before{content:"◆";color:var(--amber);font-size:.7rem}
@keyframes marquee{to{transform:translateX(-50%)}}

/* ---------- cards / panels ---------- */
.card{
  background:linear-gradient(180deg,var(--panel),var(--bg-2));border:1px solid var(--line);border-radius:var(--radius);
  padding:30px;transition:border-color .3s,transform .3s;position:relative;overflow:hidden;
}
.card:hover{border-color:var(--line-2)}
.card.lift:hover{transform:translateY(-4px)}
.card h3{margin-bottom:10px}
.icon-box{
  width:48px;height:48px;border-radius:12px;display:grid;place-items:center;margin-bottom:22px;
  background:rgba(255,176,32,.1);border:1px solid rgba(255,176,32,.25);color:var(--amber);
}
.icon-box.t{background:var(--teal-dim);border-color:rgba(25,227,177,.3);color:var(--teal)}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.split{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.tag{display:inline-block;font-family:var(--font-m);font-size:.66rem;letter-spacing:.1em;text-transform:uppercase;padding:5px 10px;border-radius:999px;border:1px solid var(--line-2);color:var(--muted)}
.tag.a{color:var(--amber);border-color:rgba(255,176,32,.35)}
.tag.t{color:var(--teal);border-color:rgba(25,227,177,.35)}
.tag.r{color:var(--red);border-color:rgba(255,77,94,.35)}

/* compare */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.compare .card ul{list-style:none;margin-top:22px;display:grid;gap:14px}
.compare li{display:flex;gap:12px;align-items:flex-start;color:#B4BDCB}
.compare li::before{flex:none;width:22px;height:22px;border-radius:50%;display:grid;place-items:center;font-size:.75rem;margin-top:1px}
.compare .bad li::before{content:"✕";background:rgba(255,77,94,.12);color:var(--red)}
.compare .good li::before{content:"✓";background:var(--teal-dim);color:var(--teal)}
.compare .good{border-color:rgba(25,227,177,.3);background:linear-gradient(180deg,rgba(25,227,177,.06),var(--bg-2))}

/* ---------- schematic ---------- */
.schematic-wrap{display:grid;grid-template-columns:1.5fr 1fr;gap:20px}
.schematic{
  border-radius:var(--radius);border:1px solid rgba(25,227,177,.25);overflow:hidden;position:relative;
  background:#081613;
  background-image:linear-gradient(rgba(25,227,177,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(25,227,177,.07) 1px,transparent 1px),
                   linear-gradient(rgba(25,227,177,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(25,227,177,.03) 1px,transparent 1px);
  background-size:80px 80px,80px 80px,16px 16px,16px 16px;
}
.schematic svg{width:100%;height:auto}
.hotspot{cursor:pointer}
.hotspot circle.ring{transition:r .2s,fill .2s}
.hotspot:hover circle.ring,.hotspot.active circle.ring{fill:var(--amber)}
.hotspot:hover text,.hotspot.active text{fill:#111}
.spec-panel{display:flex;flex-direction:column}
.spec-panel .num{font-family:var(--font-m);color:var(--amber);font-size:.8rem;letter-spacing:.12em}
.spec-panel h3{font-size:1.7rem;margin:10px 0 14px}
.spec-list{list-style:none;margin-top:22px;border-top:1px solid var(--line)}
.spec-list li{display:flex;justify-content:space-between;gap:16px;padding:12px 0;border-bottom:1px solid var(--line);font-size:.92rem}
.spec-list li span{color:var(--muted)}
.spec-list li b{font-weight:500;text-align:right}
.part-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;padding-top:24px}
.part-tabs button{width:36px;height:36px;border-radius:10px;border:1px solid var(--line-2);font-family:var(--font-m);font-size:.8rem;color:var(--muted);transition:.2s}
.part-tabs button.active,.part-tabs button:hover{background:var(--amber);color:#111;border-color:var(--amber)}

/* ---------- calculator ---------- */
.calc{display:grid;grid-template-columns:420px 1fr;gap:20px}
.field{margin-bottom:24px}
.field label{display:flex;justify-content:space-between;font-size:.9rem;color:#C2CAD6;margin-bottom:10px}
.field label output{font-family:var(--font-m);color:var(--amber)}
input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:6px;border-radius:6px;background:var(--line-2);outline:none}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:20px;height:20px;border-radius:50%;background:var(--amber);border:4px solid #1a1206;box-shadow:0 0 0 1px var(--amber);cursor:pointer}
input[type=range]::-moz-range-thumb{width:14px;height:14px;border-radius:50%;background:var(--amber);border:4px solid #1a1206;cursor:pointer}
.seg{display:flex;padding:4px;border-radius:12px;background:rgba(255,255,255,.04);border:1px solid var(--line)}
.seg button{flex:1;padding:10px;border-radius:9px;font-size:.88rem;color:var(--muted);transition:.2s}
.seg button.active{background:var(--panel-2);color:#fff;box-shadow:inset 0 0 0 1px var(--line-2)}
.kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border-radius:14px;overflow:hidden;margin-bottom:22px}
.kpis div{background:var(--panel);padding:20px}
.kpis span{display:block;font-family:var(--font-m);font-size:.64rem;letter-spacing:.12em;text-transform:uppercase;color:var(--dim)}
.kpis b{display:block;font-family:var(--font-h);font-size:clamp(1.4rem,2.4vw,2rem);font-weight:600;margin-top:6px}
.chart{width:100%;height:auto}
.chart text{font-family:var(--font-m);font-size:11px;fill:var(--dim)}
.note{font-size:.8rem;color:var(--dim);margin-top:14px}

/* ---------- charts section ---------- */
.legend{display:flex;gap:18px;flex-wrap:wrap;font-size:.82rem;color:var(--muted)}
.legend i{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:8px;vertical-align:middle}
.hbar{margin:18px 0}
.hbar .lbl{display:flex;justify-content:space-between;font-size:.9rem;margin-bottom:8px}
.hbar .lbl b{font-family:var(--font-m);font-weight:500;color:var(--amber);font-size:.85rem}
.hbar .track{height:14px;border-radius:8px;background:rgba(255,255,255,.04);position:relative;overflow:hidden}
.hbar .fill{position:absolute;top:0;bottom:0;border-radius:8px;width:0;transition:width 1.4s cubic-bezier(.2,.8,.2,1),left 1.4s cubic-bezier(.2,.8,.2,1)}

/* ---------- process ---------- */
.process{display:grid;grid-template-columns:repeat(5,1fr);gap:0;position:relative;counter-reset:step}
.process::before{content:"";position:absolute;top:27px;left:5%;right:5%;height:2px;background:linear-gradient(90deg,var(--amber),var(--teal))}
.step{padding:0 14px;text-align:center;position:relative}
.step .n{
  width:56px;height:56px;margin:0 auto 24px;border-radius:50%;display:grid;place-items:center;background:var(--bg);
  border:2px solid var(--amber);font-family:var(--font-m);color:var(--amber);position:relative;z-index:1;
}
.step:nth-child(n+3) .n{border-color:#9FD0A0;color:#C9E6A6}
.step:nth-child(n+4) .n{border-color:var(--teal);color:var(--teal)}
.step h4{margin-bottom:8px}
.step p{font-size:.9rem}

/* ---------- industries ---------- */
.industry{min-height:220px;display:flex;flex-direction:column;justify-content:flex-end}
.industry .ind-ico{position:absolute;top:26px;right:26px;opacity:.9}
.industry .tag{align-self:flex-start;margin-bottom:14px}

/* ---------- table ---------- */
.table-wrap{border:1px solid var(--line);border-radius:var(--radius);overflow:auto}
table{width:100%;border-collapse:collapse;min-width:500px}
th,td{text-align:left;padding:16px 18px;border-bottom:1px solid var(--line);font-size:.94rem}
th{font-family:var(--font-m);font-size:.7rem;letter-spacing:.12em;text-transform:uppercase;color:var(--dim);font-weight:500;background:var(--bg-2)}
td{color:#C2CAD6}
td:first-child{color:#fff;font-weight:500}
tr:last-child td{border-bottom:0}
tbody tr:hover td{background:rgba(255,255,255,.02)}

/* ---------- grippers ---------- */
.gripper svg{height:120px;margin:0 auto 22px}

/* ---------- FAQ ---------- */
.faq{max-width:860px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;gap:20px;padding:26px 0;text-align:left;font-family:var(--font-h);font-size:1.2rem;font-weight:500}
.faq-q .pm{flex:none;width:34px;height:34px;border-radius:50%;border:1px solid var(--line-2);display:grid;place-items:center;transition:transform .3s,background .3s,color .3s}
.faq-item.open .pm{transform:rotate(45deg);background:var(--amber);color:#111;border-color:var(--amber)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease}
.faq-a p{padding-bottom:26px;max-width:720px}

/* ---------- CTA ---------- */
.cta-block{
  border-radius:28px;padding:80px 60px;position:relative;overflow:hidden;border:1px solid var(--line-2);
  background:radial-gradient(600px 300px at 90% 0%,rgba(25,227,177,.18),transparent 60%),radial-gradient(600px 300px at 0% 100%,rgba(255,176,32,.16),transparent 60%),var(--panel);
}
.cta-block h2{max-width:720px}
.cta-block p{margin:20px 0 34px;max-width:560px;font-size:1.1rem}

/* ---------- forms ---------- */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-grid .full{grid-column:1/-1}
.input{
  width:100%;padding:14px 16px;border-radius:12px;border:1px solid var(--line-2);background:rgba(255,255,255,.03);
  transition:border-color .2s,background .2s;outline:none;
}
.input:focus{border-color:var(--amber);background:rgba(255,176,32,.04)}
textarea.input{min-height:140px;resize:vertical}
select.input{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%238B95A5' stroke-width='2' fill='none'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 16px center}
select.input option{background:var(--panel)}
.form-label{display:block;font-size:.82rem;color:var(--muted);margin-bottom:8px}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--line);padding:80px 0 40px;background:var(--bg-2)}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.foot-grid h5{font-family:var(--font-m);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--dim);margin-bottom:18px;font-weight:500}
.foot-grid ul{list-style:none;display:grid;gap:10px}
.foot-grid a{color:#B4BDCB;font-size:.92rem;transition:color .2s}
.foot-grid a:hover{color:var(--amber)}
.foot-bottom{display:flex;justify-content:space-between;margin-top:64px;padding-top:28px;border-top:1px solid var(--line);font-size:.82rem;color:var(--dim)}
.big-word{font-family:var(--font-h);font-weight:700;font-size:clamp(4rem,15vw,13rem);letter-spacing:-.05em;line-height:.85;margin-top:60px;
  background:linear-gradient(180deg,rgba(255,255,255,.08),rgba(255,255,255,0));-webkit-background-clip:text;background-clip:text;color:transparent;user-select:none}

/* ---------- page hero (inner pages) ---------- */
.page-hero{padding:170px 0 90px;overflow:hidden}
.page-hero::before{content:"";position:absolute;inset:0;background:radial-gradient(700px 400px at 80% 10%,rgba(25,227,177,.10),transparent 60%),radial-gradient(600px 400px at 10% 30%,rgba(255,176,32,.08),transparent 60%);pointer-events:none}
.crumbs{font-family:var(--font-m);font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--dim);margin-bottom:26px}
.crumbs a:hover{color:var(--amber)}

/* pattern builder */
.builder{display:grid;grid-template-columns:360px 1fr;gap:20px}
.layers{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.layer-view{background:#081613;border:1px solid rgba(25,227,177,.2);border-radius:14px;padding:16px}
.layer-view .mono{color:var(--teal);margin-bottom:10px;display:block}

/* safety demo */
.safety-stage{border-radius:var(--radius);border:1px solid var(--line-2);background:var(--bg-2);overflow:hidden;position:relative;touch-action:none}
.safety-stage svg{width:100%;height:auto;cursor:grab}
.speedo{display:flex;align-items:center;gap:18px;padding:18px 22px;border-top:1px solid var(--line)}
.speedo .track{flex:1;height:10px;border-radius:10px;background:rgba(255,255,255,.06);overflow:hidden}
.speedo .track i{display:block;height:100%;width:100%;border-radius:10px;transition:width .25s,background .25s}

/* reveal */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .9s cubic-bezier(.2,.8,.2,1),transform .9s cubic-bezier(.2,.8,.2,1)}
.reveal.in{opacity:1;transform:none}
.d1{transition-delay:.08s}.d2{transition-delay:.16s}.d3{transition-delay:.24s}.d4{transition-delay:.32s}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .hero-grid,.split,.schematic-wrap,.calc,.builder{grid-template-columns:1fr}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .process{grid-template-columns:1fr;gap:28px}
  .process::before{display:none}
  .step{display:grid;grid-template-columns:56px 1fr;gap:18px;text-align:left}
  .step .n{margin:0}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:820px){
  .nav-links{position:fixed;top:76px;left:0;right:0;flex-direction:column;align-items:stretch;padding:16px 24px 28px;background:rgba(7,9,13,.97);border-bottom:1px solid var(--line);transform:translateY(-130%);transition:transform .35s}
  .nav-links.open{transform:none}
  .nav-links a{padding:14px 16px}
  .nav-cta{margin:8px 0 0}
  .menu-btn{display:flex}
  .grid-2,.grid-3,.compare,.layers,.form-grid{grid-template-columns:1fr}
  .section{padding:84px 0}
  .hero-meta{gap:22px;flex-wrap:wrap}
  .telemetry{grid-template-columns:repeat(2,1fr)}
  .telemetry div:nth-child(2){border-right:0}
  .telemetry div:nth-child(-n+2){border-bottom:1px solid var(--line)}
  .kpis{grid-template-columns:1fr}
  .cta-block{padding:52px 26px}
}
@media (max-width:560px){
  .grid-4,.foot-grid{grid-template-columns:1fr}
  .foot-bottom{flex-direction:column;gap:10px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}

/* ---------- live 3D viewers ---------- */
.viewer3d{position:relative;width:100%;aspect-ratio:var(--ar,16/10);overflow:hidden;background:#0a0e14;touch-action:pan-y;user-select:none;-webkit-user-select:none}
.viewer3d>svg{position:absolute;inset:0;width:100%;height:100%}
.viewer3d.live>svg{display:none}
.viewer3d.failed{aspect-ratio:auto;background:none}
.viewer3d.failed>svg{position:static;height:auto}
.viewer3d canvas{position:absolute;inset:0;width:100%!important;height:100%!important;display:block;cursor:grab;z-index:0}
.viewer3d.dragging canvas{cursor:grabbing}
.viewer3d.live::after{content:"";position:absolute;inset:0;pointer-events:none;z-index:1;background:radial-gradient(ellipse at 50% 45%,transparent 58%,rgba(5,7,10,.5) 100%)}
.v3d-ui{position:absolute;inset:0;pointer-events:none;z-index:2;overflow:hidden}
.v3d-chip{position:absolute;font-family:var(--font-m);font-size:.64rem;letter-spacing:.12em;text-transform:uppercase;padding:6px 10px;border-radius:8px;background:rgba(7,9,13,.62);backdrop-filter:blur(6px);border:1px solid var(--line-2);color:#B4BDCB;max-width:calc(100% - 24px);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.v3d-chip:empty{display:none}
.v3d-chip.tl{top:12px;left:12px}
.v3d-chip.tr{top:12px;right:12px;color:var(--teal)}
.v3d-chip.bl{bottom:12px;left:12px;color:var(--dim)}
.v3d-ctrl{position:absolute;right:12px;bottom:12px;display:flex;gap:6px;pointer-events:auto}
.v3d-ctrl button{width:34px;height:34px;border-radius:9px;background:rgba(7,9,13,.72);border:1px solid var(--line-2);color:#fff;font-size:1rem;line-height:1;transition:.2s}
.v3d-ctrl button:hover{border-color:var(--amber);color:var(--amber)}
.hs3d{position:absolute;left:0;top:0;width:28px;height:28px;margin:-14px 0 0 -14px;border-radius:50%;background:rgba(7,9,13,.78);border:2px solid var(--amber);color:var(--amber);font-family:var(--font-m);font-size:.72rem;display:grid;place-items:center;pointer-events:auto;cursor:pointer;transition:background .2s,color .2s,opacity .25s;will-change:transform}
.hs3d::before{content:"";position:absolute;inset:-7px;border-radius:50%;border:1px solid rgba(255,176,32,.55);animation:hsPulse 2.2s infinite;pointer-events:none}
.hs3d:hover,.hs3d.active{background:var(--amber);color:#111}
.hs3d.label{width:auto;height:auto;margin:0;border-radius:8px;padding:5px 9px;border-width:1px;white-space:nowrap;font-size:.6rem;letter-spacing:.1em;text-transform:uppercase;cursor:default;pointer-events:none;color:#fff;border-color:rgba(255,176,32,.6)}
.hs3d.label::before{display:none}
.hs3d.label::after{content:"";position:absolute;left:50%;top:100%;width:1px;height:14px;background:rgba(255,176,32,.6)}
@keyframes hsPulse{0%{transform:scale(.8);opacity:.9}100%{transform:scale(1.5);opacity:0}}
.scn-switch{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:20px}
.scn-switch button{text-align:left;padding:16px 18px;border-radius:14px;border:1px solid var(--line);background:var(--panel);transition:.2s}
.scn-switch button b{display:block;font-family:var(--font-h);font-weight:600;font-size:1.02rem}
.scn-switch button span{display:block;font-size:.82rem;color:var(--muted);margin-top:3px}
.scn-switch button:hover{border-color:var(--line-2)}
.scn-switch button.active{border-color:var(--amber);background:linear-gradient(180deg,rgba(255,176,32,.10),var(--panel))}
.scn-switch button.active b{color:var(--amber)}
@media (max-width:820px){.scn-switch{grid-template-columns:1fr}}