/* SmartMains — smart-mains.com
   Static multi-page site. Technical theme. No build step. */

:root{
  --bg:#0b1120;            /* deep slate */
  --bg-2:#0f172a;
  --panel:#111a2e;
  --panel-2:#152039;
  --line:#22304d;
  --text:#e6edf7;
  --muted:#9fb0c9;
  --muted-2:#6b7d99;
  --accent:#38bdf8;        /* cyan */
  --accent-2:#818cf8;      /* indigo */
  --good:#43e97b;
  --radius:14px;
  --max:1140px;
  --font:'Segoe UI',system-ui,-apple-system,Roboto,Helvetica,Arial,sans-serif;
  --mono:'Cascadia Code',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:var(--font);color:var(--text);
  background:var(--bg);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--accent);text-decoration:none}
a:hover{color:#7dd3fc}
img{max-width:100%;display:block}
h1,h2,h3{line-height:1.2;margin:0 0 .5em}
h1{font-size:clamp(2rem,5vw,3.2rem);letter-spacing:-.02em}
h2{font-size:clamp(1.5rem,3vw,2rem);letter-spacing:-.01em}
p{margin:0 0 1em}
.container{max-width:var(--max);margin:0 auto;padding:0 24px}
.muted{color:var(--muted)}
.accent{color:var(--accent)}

/* ---- nav ---- */
.nav{
  position:sticky;top:0;z-index:50;
  background:rgba(11,17,32,.82);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav .container{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--text);font-size:1.15rem;letter-spacing:-.01em}
.brand .dot{width:12px;height:12px;border-radius:50%;
  background:radial-gradient(circle at 30% 30%,var(--accent),var(--accent-2));
  box-shadow:0 0 12px var(--accent)}
.brand b{color:var(--accent)}
.nav-links{display:flex;gap:6px;align-items:center}
.nav-links a{
  color:var(--muted);padding:8px 14px;border-radius:8px;font-weight:500;font-size:.95rem;
}
.nav-links a:hover{color:var(--text);background:var(--panel)}
.nav-links a.active{color:var(--text);background:var(--panel-2)}
.nav-cta{border:1px solid var(--line);color:var(--text)!important}
.nav-cta:hover{border-color:var(--accent);background:transparent!important}

/* ---- hero ---- */
.hero{
  position:relative;padding:88px 0 64px;overflow:hidden;
  background:
    radial-gradient(60% 120% at 80% -10%,rgba(56,189,248,.14),transparent 60%),
    radial-gradient(50% 100% at 0% 0%,rgba(129,140,248,.12),transparent 55%);
  border-bottom:1px solid var(--line);
}
.hero .eyebrow{
  display:inline-block;font-size:.82rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--accent);border:1px solid var(--line);border-radius:999px;padding:5px 14px;margin-bottom:22px;
  background:var(--panel)
}
.hero p.lead{font-size:1.2rem;color:var(--muted);max-width:640px}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.btn{
  display:inline-block;padding:12px 22px;border-radius:10px;font-weight:600;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#08111f;
  border:1px solid transparent;transition:transform .15s ease, box-shadow .15s ease;
}
.btn:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(56,189,248,.25);color:#08111f}
.btn.ghost{background:transparent;color:var(--text);border-color:var(--line)}
.btn.ghost:hover{border-color:var(--accent);box-shadow:none}
.btn-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px}
.hero-media{display:flex;justify-content:center;align-items:center}
.hero-art{width:100%;height:auto;max-width:560px;filter:drop-shadow(0 20px 50px rgba(56,189,248,.15))}

/* ---- sections ---- */
.section{padding:72px 0;border-bottom:1px solid var(--line)}
.section h2 + .sub{color:var(--muted);max-width:640px;margin:-6px 0 40px}
.kicker{color:var(--accent);font-weight:600;letter-spacing:.08em;text-transform:uppercase;font-size:.8rem;margin-bottom:10px}

/* ---- cards ---- */
.grid{display:grid;gap:22px}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}
.card{
  background:linear-gradient(180deg,var(--panel),var(--bg-2));
  border:1px solid var(--line);border-radius:var(--radius);padding:26px;
  transition:border-color .2s ease,transform .2s ease;
}
.card:hover{border-color:var(--accent-2);transform:translateY(-3px)}
.card h3{font-size:1.2rem;display:flex;align-items:center;gap:10px}
.card .ico{font-size:1.3rem}
.card .tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:16px}
.tag{font-size:.74rem;color:var(--muted);border:1px solid var(--line);border-radius:6px;padding:3px 9px;background:var(--bg-2);font-family:var(--mono)}

/* ---- product blocks (Product page) ---- */
.product{
  display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:center;
  padding:44px 0;border-bottom:1px solid var(--line);
}
.product:nth-child(even) .product-media{order:2}
.product-media{min-height:260px}
.shot{
  height:100%;min-height:260px;border-radius:var(--radius);border:1px solid var(--line);
  background:
    repeating-linear-gradient(45deg,rgba(56,189,248,.05) 0 10px,transparent 10px 20px),
    linear-gradient(135deg,var(--panel-2),var(--bg-2));
  display:flex;align-items:center;justify-content:center;flex-direction:column;gap:8px;color:var(--muted-2);
  text-align:center;padding:20px;overflow:hidden;
}
.shot img{width:100%;height:100%;object-fit:contain;border-radius:var(--radius)}
.shot .ph-label{font-family:var(--mono);font-size:.8rem}
.product h3{font-size:1.6rem}
.product .role{color:var(--accent);font-weight:600;font-size:.9rem;letter-spacing:.04em;text-transform:uppercase;margin-bottom:8px}

/* flagship featured product — Edge-AI Vision, as large as possible */
.product.featured{grid-template-columns:1fr;gap:22px;padding:12px 0 56px}
.product.featured .product-media{min-height:auto}
.product.featured .shot{min-height:auto;height:auto;padding:6px;border:none;
  background:radial-gradient(58% 62% at 50% 46%,rgba(56,189,248,.12),transparent 72%)}
.product.featured .shot img{max-height:min(76vh,740px);width:100%;height:auto}
.product.featured h3{font-size:2.5rem}
.product.featured .role{font-size:1rem}
.callout{border-left:3px solid var(--accent);background:rgba(56,189,248,.08);
  padding:12px 16px;border-radius:10px;margin:14px 0;color:var(--text)}

/* ---- spec tables (Tech page) ---- */
.spec{width:100%;border-collapse:collapse;margin:6px 0 8px}
.spec td{padding:9px 12px;border-bottom:1px solid var(--line);vertical-align:top;font-size:.95rem}
.spec td:first-child{color:var(--muted);width:34%;font-weight:500}
.spec td:last-child{color:var(--text)}
.spec td .mono,.mono{font-family:var(--mono)}
.tech-block{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:28px;margin-bottom:26px}
.tech-block h3{display:flex;align-items:center;gap:10px;font-size:1.35rem}
.note{background:var(--bg-2);border-left:3px solid var(--accent);border-radius:8px;padding:14px 18px;color:var(--muted);font-size:.92rem;margin:14px 0}

/* ---- clients strip ---- */
.clients{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:26px}
.client{
  border:1px solid var(--line);border-radius:10px;padding:12px 22px;color:var(--muted);
  background:var(--panel);font-weight:600;letter-spacing:.02em;font-size:.95rem;
}

/* ---- mermaid ---- */
.diagram{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin:18px 0;overflow-x:auto}
.mermaid{display:flex;justify-content:center}

/* ---- contact ---- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.field{margin-bottom:16px}
.field label{display:block;font-size:.85rem;color:var(--muted);margin-bottom:6px}
.field input,.field textarea{
  width:100%;padding:12px 14px;border-radius:10px;border:1px solid var(--line);
  background:var(--bg-2);color:var(--text);font-family:var(--font);font-size:1rem;
}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--accent)}
.contact-info li{list-style:none;padding:14px 0;border-bottom:1px solid var(--line);color:var(--muted)}
.contact-info li b{color:var(--text);display:block;font-weight:600}
ul.contact-info{padding:0;margin:0}

/* ---- footer ---- */
.footer{padding:40px 0;color:var(--muted-2);font-size:.9rem}
.footer .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px}
.footer a{color:var(--muted)}

/* ---- responsive ---- */
@media(max-width:820px){
  .hero-grid,.product,.contact-grid,.grid.cols-3,.grid.cols-2{grid-template-columns:1fr}
  .product:nth-child(even) .product-media{order:0}
  .nav-links{display:none}
  .hero{padding:56px 0 40px}
  .section{padding:52px 0}
}