/* Reva Autonomous Systems: shared styles for every page */
:root{
  --ink:#14181d; --steel:#1f262e; --steel-2:#2a333d; --line:#d9dde2; --muted:#5d6874;
  --paper:#f5f6f7; --white:#fff; --amber:#f2a900; --amber-dk:#a87500; --ok:#2e7d4f; --dev:#8a5a00;
  --max:1180px; --r:6px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:Barlow,system-ui,sans-serif;color:var(--ink);background:var(--white);line-height:1.55;font-size:17px;overflow-x:hidden}
img,svg{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3{font-family:"Barlow Condensed",Barlow,sans-serif;line-height:1.1;margin:0 0 .5em;letter-spacing:.01em}
h2{font-size:clamp(30px,4vw,44px)}
h3{font-size:24px}
p{margin:0 0 1em}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.eyebrow{font-weight:700;text-transform:uppercase;letter-spacing:.14em;font-size:13px;color:var(--amber-dk);margin-bottom:10px}
.dark .eyebrow,.hero .eyebrow,.page-hero .eyebrow{color:var(--amber)}
.btn{display:inline-block;padding:13px 22px;border-radius:var(--r);font-weight:700;text-decoration:none;border:2px solid transparent;cursor:pointer;font-size:16px;font-family:inherit;line-height:1.2}
.btn-amber{background:var(--amber);color:var(--ink)}
.btn-amber:hover{background:#ffb81c}
.btn-ghost{border-color:#ffffff66;color:#fff}
.btn-ghost:hover{border-color:#fff}
.btn-line{border-color:var(--ink);color:var(--ink)}
.btn-line:hover{background:var(--ink);color:#fff}
section{padding:80px 0}
@media (max-width:640px){section{padding:56px 0}}
.alt{background:var(--paper)}
.dark{background:var(--steel);color:#e9edf1}
.dark .muted{color:#aab4bf}
.muted{color:var(--muted)}
.small{font-size:14px}
.note{font-size:13px;color:var(--muted);margin-top:10px}
.lead{font-size:20px}
.mt{margin-top:40px}
.narrow{max-width:760px}

/* header */
.skip{position:absolute;left:-999px;top:0;background:var(--amber);color:var(--ink);padding:8px 12px;z-index:50}
.skip:focus{left:8px}
header{position:sticky;top:0;z-index:20;background:var(--ink);color:#fff;border-bottom:3px solid var(--amber)}
.nav{display:flex;align-items:center;justify-content:space-between;height:66px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;font-family:"Barlow Condensed";font-size:22px;font-weight:700;letter-spacing:.03em;white-space:nowrap}
.logo small{display:block;font-family:Barlow;font-size:11px;font-weight:500;letter-spacing:.2em;color:#aab4bf;margin-top:-3px}
.menu{display:flex;gap:22px;align-items:center}
.menu a{text-decoration:none;font-weight:600;font-size:15px;color:#d6dce2}
.menu a:hover,.menu a.active{color:var(--amber)}
.menu .btn{padding:9px 16px;font-size:15px;color:var(--ink)}
.menu .btn.active{color:var(--ink)}
.burger{display:none;background:none;border:0;color:#fff;font-size:28px;cursor:pointer;padding:4px 8px}
@media (max-width:980px){
  .burger{display:block}
  .menu{display:none;position:absolute;top:69px;left:0;right:0;background:var(--ink);flex-direction:column;align-items:flex-start;padding:16px 20px 22px;gap:14px;border-bottom:3px solid var(--amber)}
  .menu.open{display:flex}
}

/* home hero */
.hero{background:linear-gradient(160deg,#14181d 0%,#222b34 70%,#2a333d 100%);color:#fff;padding:80px 0 0;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:40px;align-items:center}
.hero h1{font-size:clamp(40px,6vw,68px);text-transform:uppercase}
.hero h1 span,.page-hero h1 span{color:var(--amber)}
.hero p.lead{color:#c9d1d9;max-width:560px}
.ctas{display:flex;gap:12px;flex-wrap:wrap;margin:26px 0 34px}
.stats{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid #ffffff22;margin-top:56px}
.stat{padding:22px 10px 26px;border-right:1px solid #ffffff22}
.stat:last-child{border-right:0}
.stat b{display:block;font-family:"Barlow Condensed";font-size:38px;color:var(--amber);line-height:1}
.stat span{font-size:14px;color:#aab4bf}
.stats-note{font-size:12px;color:#7f8a95;padding-bottom:16px}
@media (max-width:900px){.hero{padding-top:56px}.hero-grid{grid-template-columns:1fr}.stats{grid-template-columns:repeat(2,1fr)}.stat:nth-child(2){border-right:0}.stat:nth-child(-n+2){border-bottom:1px solid #ffffff22}}

/* inner page hero */
.page-hero{background:linear-gradient(160deg,#14181d 0%,#222b34 80%);color:#fff;padding:64px 0 56px}
.page-hero h1{font-size:clamp(36px,5vw,58px);text-transform:uppercase;max-width:900px}
.page-hero p{color:#c9d1d9;max-width:720px;font-size:19px}
.crumbs{font-size:14px;color:#8d98a3;margin-bottom:14px}
.crumbs a{color:#c9d1d9;text-decoration:none}
.subnav{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.subnav a{border:1px solid #ffffff44;border-radius:30px;padding:8px 14px;text-decoration:none;font-weight:600;font-size:15px;color:#e9edf1}
.subnav a:hover{border-color:var(--amber);color:var(--amber)}

/* layout */
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.split.center{align-items:center}
@media (max-width:860px){.split{grid-template-columns:1fr;gap:32px}}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media (max-width:860px){.grid3{grid-template-columns:1fr}}

/* comparison */
.compare{border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.compare table{width:100%;border-collapse:collapse;font-size:15px}
.compare th,.compare td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.compare th{background:var(--ink);color:#fff;font-weight:600}
.compare td:first-child{font-weight:600;width:28%}
.compare tr:last-child td{border-bottom:0}
.compare .new{background:#fff8e6}
@media (max-width:480px){.compare th,.compare td{padding:10px 9px;font-size:14px}}

/* product cards */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:20px;margin-top:34px}
.cards.five{grid-template-columns:repeat(6,1fr)}
.cards.five .card{grid-column:span 2}
.cards.five .card:nth-child(-n+2){grid-column:span 3}
@media (max-width:980px){.cards.five{grid-template-columns:1fr 1fr}.cards.five .card,.cards.five .card:nth-child(-n+2){grid-column:auto}}
@media (max-width:600px){.cards.five{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px;display:flex;flex-direction:column;text-decoration:none;transition:border-color .15s,box-shadow .15s}
a.card:hover{border-color:var(--amber);box-shadow:0 6px 18px #0000000f}
.card .cap{font-family:"Barlow Condensed";font-size:34px;font-weight:700;line-height:1}
.card .cap small{font-size:16px;color:var(--muted);font-weight:600}
.card h3{margin-top:10px}
.card ul{padding-left:18px;margin:0 0 16px;color:var(--muted);font-size:15px}
.card .more{font-weight:700;font-size:15px;margin-top:12px;color:var(--amber-dk)}
.tag{display:inline-block;align-self:flex-start;margin-top:auto;font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.08em;padding:5px 9px;border-radius:4px}
.tag.dev{background:#fff1cc;color:var(--dev)}
.tag.trial{background:#e3f1e8;color:var(--ok)}
.tag.order{background:#e6ecf3;color:#28466b}
.page-hero .tag{margin:0 0 14px}

/* feature list */
.feats{list-style:none;padding:0;margin:0;display:grid;gap:12px}
.feats li{padding-left:28px;position:relative}
.feats li::before{content:"";position:absolute;left:0;top:8px;width:14px;height:8px;border-left:3px solid var(--amber-dk);border-bottom:3px solid var(--amber-dk);transform:rotate(-45deg)}
.dark .feats li::before,.pilot .feats li::before{border-color:var(--amber)}

/* spec table */
.spec-wrap{overflow-x:auto;margin-top:24px;border:1px solid var(--line);border-radius:var(--r);background:#fff;-webkit-overflow-scrolling:touch}
.spec{width:100%;border-collapse:collapse;font-size:15px}
.spec.wide{min-width:720px}
.spec th,.spec td{padding:11px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.spec thead th{background:var(--steel);color:#fff}
.spec tbody th{font-weight:600;background:#fafbfc;width:32%}
.spec.wide tbody th{width:22%}
.spec tr:last-child td,.spec tr:last-child th{border-bottom:0}
.scroll-hint{display:none;font-size:13px;color:var(--muted);margin-top:6px}
@media (max-width:760px){.scroll-hint{display:block}}

/* product block */
.prod{scroll-margin-top:80px}
.prod + .prod{border-top:1px solid var(--line)}
.prod h2 .tag{vertical-align:middle;margin-left:8px;font-family:Barlow;letter-spacing:.08em}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0 0;padding:0;list-style:none}
.chips li{border:1px solid var(--line);background:#fff;padding:6px 12px;border-radius:30px;font-weight:600;font-size:14px}

/* photo / video placeholders */
.ph{aspect-ratio:4/3;border:2px dashed #b9c1c9;border-radius:var(--r);display:grid;place-items:center;text-align:center;padding:20px;color:var(--muted);font-size:14px;font-weight:600;
  background:repeating-linear-gradient(45deg,#f0f2f4 0 14px,#e8ebee 14px 28px)}
.ph.wide{aspect-ratio:16/9}
.ph b{display:block;font-size:16px;color:var(--ink);margin-bottom:4px}
.dark .ph{border-color:#4a545f;background:repeating-linear-gradient(45deg,#232b33 0 14px,#283039 14px 28px);color:#aab4bf}
.dark .ph b{color:#fff}

/* why */
.why{display:grid;grid-template-columns:repeat(3,1fr);gap:2px;background:#ffffff1a;border-radius:var(--r);overflow:hidden;margin-top:34px}
.why div{background:var(--steel);padding:28px}
.why b{display:block;font-family:"Barlow Condensed";font-size:22px;color:#fff;margin-bottom:6px}
.why .n{color:var(--amber);font-family:"Barlow Condensed";font-size:15px;font-weight:700}
@media (max-width:860px){.why{grid-template-columns:1fr}}

/* interlock rules */
.interlock{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:20px}
.interlock div{border-left:4px solid var(--amber);background:#fff;padding:16px 18px;border-radius:0 var(--r) var(--r) 0;font-size:15px}
.alt .interlock div{background:#fff}
section:not(.alt) .interlock div{background:var(--paper)}
@media (max-width:700px){.interlock{grid-template-columns:1fr}}

/* industries */
.inds{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.inds span{border:1px solid var(--line);background:#fff;padding:9px 14px;border-radius:30px;font-weight:600;font-size:15px}

/* process steps */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;margin-top:34px;counter-reset:s}
.steps.four{grid-template-columns:repeat(4,1fr)}
.steps div{counter-increment:s;padding-top:12px;border-top:3px solid var(--ink)}
.dark .steps div{border-color:var(--amber)}
.steps div::before{content:"0" counter(s);font-family:"Barlow Condensed";font-size:30px;font-weight:700;color:var(--amber-dk);display:block}
.dark .steps div::before{color:var(--amber)}
.steps b{display:block;margin-bottom:4px}
.steps p{font-size:15px;color:var(--muted)}
@media (max-width:860px){.steps,.steps.four{grid-template-columns:1fr 1fr}}
@media (max-width:420px){.steps,.steps.four{grid-template-columns:1fr}}

/* development log */
.log{margin-top:28px;border-left:2px solid var(--line);padding-left:24px}
.log div{position:relative;margin-bottom:24px}
.log div::before{content:"";position:absolute;left:-31px;top:6px;width:12px;height:12px;border-radius:50%;background:var(--amber);border:2px solid #fff;box-shadow:0 0 0 1px var(--amber-dk)}
.log div.next::before{background:#fff}
.log time{font-weight:700;font-size:14px;color:var(--amber-dk);display:block}
.log b{display:block}
.pilot{background:var(--ink);color:#fff;border-radius:var(--r);padding:30px}
.pilot p{color:#c9d1d9}
.pilot .feats{margin-bottom:22px;color:#c9d1d9}

/* cta band */
.band{background:var(--amber);padding:44px 0}
.band .wrap{display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.band h2{margin:0;font-size:clamp(26px,3.4vw,36px)}
.band p{margin:4px 0 0}
.band .btn{background:var(--ink);color:#fff}
.band .btn:hover{background:#000}

/* parent stats */
.parent{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:28px 0 0}
.parent div{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:18px}
.parent b{font-family:"Barlow Condensed";font-size:32px;display:block;line-height:1}
.parent span{font-size:14px;color:var(--muted)}
.parent div{min-width:0;overflow-wrap:anywhere}
@media (max-width:760px){.parent{grid-template-columns:1fr 1fr}}
@media (max-width:400px){.parent b{font-size:26px}.parent div{padding:14px}}

/* form */
form.enq{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:28px;display:grid;grid-template-columns:1fr 1fr;gap:16px}
form.enq .full{grid-column:1/-1}
form.enq > div{min-width:0}
label{font-weight:600;font-size:14px;display:block;margin-bottom:5px}
input,select,textarea{width:100%;padding:11px 12px;border:1px solid #c3c9cf;border-radius:4px;font:inherit;font-size:16px;background:#fff;color:var(--ink)}
input:focus,select:focus,textarea:focus{outline:2px solid var(--amber);border-color:var(--amber)}
.hp{position:absolute!important;left:-5000px!important;width:1px;height:1px;overflow:hidden}
.form-status{font-weight:600;margin:0}
.form-status.ok{color:var(--ok)}
.form-status.err{color:#b3261e}
@media (max-width:640px){form.enq{grid-template-columns:1fr;padding:20px}}
.contact-side p{margin-bottom:.8em}
.todo{background:#fff1cc;color:var(--dev);padding:1px 6px;border-radius:3px;font-weight:600}

/* footer */
footer{background:var(--ink);color:#aab4bf;padding:48px 0 28px;font-size:14px}
.fgrid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:28px}
.fgrid b{color:#fff;display:block;margin-bottom:8px}
.fgrid a{color:#d6dce2;text-decoration:none;display:block;margin-bottom:5px}
.fgrid a:hover{color:var(--amber)}
.fbase{border-top:1px solid #ffffff1f;margin-top:32px;padding-top:18px;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:13px}
.fbase a{color:#d6dce2}
@media (max-width:860px){.fgrid{grid-template-columns:1fr 1fr}}
@media (max-width:480px){.fgrid{grid-template-columns:1fr}}

.wa{position:fixed;right:18px;bottom:18px;z-index:30;background:#25d366;color:#fff;width:56px;height:56px;border-radius:50%;display:grid;place-items:center;box-shadow:0 4px 14px #0004;text-decoration:none}

/* exploded-view sketches and trial video (added 9-Nov-2026) */
.sketch{margin:0;background:var(--white);border:1px solid var(--line);border-radius:var(--r);padding:14px}
.sketch img{display:block;width:100%;height:auto}
.sketch figcaption,.vid figcaption{font-size:13px;color:var(--muted);margin-top:8px}
.vid{margin:0}
.vid video,.vid img{display:block;max-height:520px;max-width:100%;margin:0 auto;border-radius:var(--r);background:#000}
.dark .sketch{background:#fff}
.sketch.wide{margin:28px auto 6px;max-width:1000px}