/* ===========================================================================
   InferenceVideo — brand system (Inference-family, cinematic dark)
   Sibling to InferenceOffice/InferenceLegal: near-black ground, electric
   blue→cyan motion accent, warm amber for human/CTA. "patron", not "user".
   =========================================================================== */
:root{
  --bg:#06070C; --bg-2:#090B12; --panel:#0E1119; --panel-2:#12151F;
  --ink:#EEF1F7; --ink-soft:#9AA4B8; --ink-dim:#6B7488;
  --line:#1B2233; --line-2:#232C42;
  --blue:#3B82F6; --blue-2:#5B9BFF; --cyan:#35C6FF; --amber:#E6A845; --amber-2:#F2C070;
  --good:#4E9B78; --bad:#E06A6A;
  --grad:linear-gradient(90deg,var(--blue) 0%, var(--cyan) 100%);
  --grad-135:linear-gradient(135deg,var(--blue) 0%, var(--cyan) 100%);
  --sans:"Helvetica Neue",Inter,Arial,system-ui,sans-serif;
  --mono:"SF Mono",ui-monospace,Menlo,monospace;
  --maxw:1180px; --r:14px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:var(--sans);line-height:1.6;
  -webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:var(--cyan);text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 26px}
.eyebrow{color:var(--cyan);font-weight:800;letter-spacing:.16em;text-transform:uppercase;font-size:12.5px}
h1,h2,h3{letter-spacing:-.02em;line-height:1.06;font-weight:800}
.muted{color:var(--ink-soft)}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:9px;font-weight:700;font-size:15px;border-radius:11px;
  padding:13px 22px;cursor:pointer;border:1px solid transparent;transition:transform .12s,box-shadow .2s;white-space:nowrap}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--grad);color:#04121f;box-shadow:0 8px 30px rgba(53,198,255,.22)}
.btn-primary:hover{box-shadow:0 12px 40px rgba(53,198,255,.34)}
.btn-ghost{background:rgba(255,255,255,.04);color:var(--ink);border-color:var(--line-2)}
.btn-ghost:hover{border-color:var(--cyan);color:#fff}
.btn-warm{background:linear-gradient(90deg,var(--amber),var(--amber-2));color:#211603}

/* nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(6,7,12,.72);backdrop-filter:blur(14px) saturate(160%);
  border-bottom:1px solid var(--line)}
.nav .in{max-width:var(--maxw);margin:0 auto;padding:0 26px;height:64px;display:flex;align-items:center;justify-content:space-between}
.nav .links{display:flex;gap:26px;align-items:center}
.nav .links a{color:var(--ink-soft);font-size:14px;font-weight:600}
.nav .links a:hover{color:#fff}
@media(max-width:820px){.nav .links a:not(.btn){display:none}}

/* logo */
.logo{display:flex;align-items:center;gap:11px;font-weight:800;font-size:17px;color:#fff;letter-spacing:-.01em}
.logo .mark{width:30px;height:30px;flex:none}
.logo .v{color:var(--cyan)}

/* section rhythm */
section{padding:88px 0}
.center{text-align:center}
.lead{font-size:19px;color:var(--ink-soft);max-width:660px}
.center .lead{margin-left:auto;margin-right:auto}

/* cards / pillars */
.grid{display:grid;gap:22px}
.g-3{grid-template-columns:repeat(3,1fr)}
.g-2{grid-template-columns:repeat(2,1fr)}
.g-4{grid-template-columns:repeat(4,1fr)}
@media(max-width:900px){.g-3,.g-4{grid-template-columns:1fr}.g-2{grid-template-columns:1fr}}
.card{background:linear-gradient(180deg,var(--panel),var(--bg-2));border:1px solid var(--line);
  border-radius:var(--r);padding:26px}
.card:hover{border-color:var(--line-2)}
.card .ic{width:44px;height:44px;border-radius:11px;display:grid;place-items:center;margin-bottom:16px;
  background:rgba(53,198,255,.10);border:1px solid rgba(53,198,255,.25)}
.card h3{font-size:19px;margin-bottom:8px}
.card p{color:var(--ink-soft);font-size:14.5px}
.pill{display:inline-block;font-size:11.5px;font-weight:800;letter-spacing:.1em;text-transform:uppercase;
  color:var(--cyan);border:1px solid rgba(53,198,255,.3);border-radius:999px;padding:5px 12px}

/* footer */
footer{border-top:1px solid var(--line);background:var(--bg-2);padding:40px 0}
footer .in{max-width:var(--maxw);margin:0 auto;padding:0 26px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;align-items:center}
footer .muted{font-size:13px}
footer a{color:var(--ink-soft);font-size:13px;margin-left:18px}
footer a:hover{color:#fff}
.nosrc{color:var(--amber);font-weight:700}