/* ============================================================================
   VisionBase Studio — marketing site stylesheet (self-contained, no deps)
   Dark industrial-tech theme. Each persona page overrides --accent.
   ============================================================================ */
:root{
  --bg:#0b0e14;
  --bg-2:#11151d;
  --bg-elev:#161b25;
  --bg-card:#181d28;
  --border:#262d3a;
  --border-soft:#1e2531;
  --text:#e7edf5;
  --text-dim:#9aa6b8;
  --text-faint:#6b7689;
  --accent:#4f8cff;          /* brand blue — overridden per persona */
  --accent-2:#22d3ee;
  --ok:#3ad17a;
  --warn:#f5b13d;
  --fail:#f4596b;
  --radius:14px;
  --radius-sm:9px;
  --maxw:1140px;
  --mono:ui-monospace,"Cascadia Code","Consolas",monospace;
  --sans:-apple-system,"Segoe UI",Inter,Roboto,Helvetica,Arial,sans-serif;
  --shadow:0 12px 40px -12px rgba(0,0,0,.6);
  --glow:0 0 0 1px color-mix(in srgb,var(--accent) 40%,transparent),0 10px 40px -10px color-mix(in srgb,var(--accent) 50%,transparent);
}
*{ box-sizing:border-box; margin:0; padding:0; }
html{ scroll-behavior:smooth; }
body{
  font-family:var(--sans);
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{ color:inherit; text-decoration:none; }
img,svg{ display:block; max-width:100%; }
.container{ width:100%; max-width:var(--maxw); margin:0 auto; padding:0 24px; }
.section{ padding:84px 0; }
.section-tight{ padding:56px 0; }
section{ position:relative; }

/* ---------- type ---------- */
h1,h2,h3,h4{ line-height:1.18; font-weight:700; letter-spacing:-.02em; }
h1{ font-size:clamp(2.1rem,5vw,3.5rem); }
h2{ font-size:clamp(1.6rem,3.4vw,2.4rem); }
h3{ font-size:1.18rem; }
p{ color:var(--text-dim); }
.lead{ font-size:clamp(1.05rem,1.6vw,1.28rem); color:var(--text-dim); }
.eyebrow{
  display:inline-block; font-size:.8rem; font-weight:700; letter-spacing:.16em;
  text-transform:uppercase; color:var(--accent); margin-bottom:14px;
}
.gradient-text{
  background:linear-gradient(100deg,var(--text) 30%,var(--accent) 75%,var(--accent-2));
  -webkit-background-clip:text; background-clip:text; -webkit-text-fill-color:transparent;
}
.muted{ color:var(--text-faint); }
.center{ text-align:center; }
.maxw-prose{ max-width:760px; }
.mx-auto{ margin-left:auto; margin-right:auto; }

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:9px;
  font-weight:600; font-size:.98rem; padding:13px 22px; border-radius:11px;
  border:1px solid transparent; cursor:pointer; transition:.18s ease;
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(180deg,color-mix(in srgb,var(--accent) 92%,white),var(--accent));
  color:#06101f; box-shadow:0 8px 24px -8px color-mix(in srgb,var(--accent) 70%,transparent);
}
.btn-primary:hover{ transform:translateY(-2px); filter:brightness(1.06); }
.btn-ghost{ background:transparent; color:var(--text); border-color:var(--border); }
.btn-ghost:hover{ border-color:var(--accent); color:#fff; background:color-mix(in srgb,var(--accent) 10%,transparent); }
.btn-lg{ padding:15px 28px; font-size:1.04rem; }

/* ---------- nav ---------- */
.nav{
  position:sticky; top:0; z-index:50;
  backdrop-filter:saturate(140%) blur(12px);
  background:color-mix(in srgb,var(--bg) 78%,transparent);
  border-bottom:1px solid var(--border-soft);
}
.nav-inner{ display:flex; align-items:center; justify-content:space-between; height:66px; }
.brand{ display:flex; align-items:center; gap:11px; font-weight:700; font-size:1.06rem; letter-spacing:-.01em; }
.brand .mark{ width:30px; height:30px; }
.brand small{ color:var(--text-faint); font-weight:500; font-size:.7rem; letter-spacing:.12em; text-transform:uppercase; }
.nav-links{ display:flex; align-items:center; gap:6px; }
.nav-links a{
  color:var(--text-dim); font-size:.93rem; font-weight:500; padding:8px 13px; border-radius:8px; transition:.15s;
}
.nav-links a:hover{ color:#fff; background:var(--bg-elev); }
.nav-links a.active{ color:#fff; }
.nav-cta{ margin-left:8px; }
.nav-toggle{ display:none; }
.hamburger{ display:none; }

/* ---------- hero ---------- */
.hero{ position:relative; padding:96px 0 84px; overflow:hidden; }
.hero::before{
  content:""; position:absolute; inset:0; z-index:0;
  background:
    radial-gradient(900px 420px at 72% -10%,color-mix(in srgb,var(--accent) 26%,transparent),transparent 60%),
    radial-gradient(700px 380px at 5% 8%,color-mix(in srgb,var(--accent-2) 12%,transparent),transparent 55%);
}
.grid-bg::after{
  content:""; position:absolute; inset:0; z-index:0; opacity:.5;
  background-image:linear-gradient(var(--border-soft) 1px,transparent 1px),linear-gradient(90deg,var(--border-soft) 1px,transparent 1px);
  background-size:46px 46px;
  mask-image:radial-gradient(circle at 50% 0%,#000 0%,transparent 72%);
}
.hero .container{ position:relative; z-index:1; }
.hero-badge{
  display:inline-flex; align-items:center; gap:8px; font-size:.82rem; font-weight:600;
  color:var(--text-dim); background:var(--bg-elev); border:1px solid var(--border);
  padding:6px 13px; border-radius:999px; margin-bottom:24px;
}
.hero-badge .dot{ width:7px; height:7px; border-radius:50%; background:var(--ok); box-shadow:0 0 8px var(--ok); }
.hero h1{ max-width:16ch; }
.hero .lead{ max-width:54ch; margin-top:20px; }
.hero-actions{ display:flex; flex-wrap:wrap; gap:14px; margin-top:34px; }
.hero-stats{ display:flex; flex-wrap:wrap; gap:38px; margin-top:54px; }
.hero-stats .stat .n{ font-size:1.9rem; font-weight:800; letter-spacing:-.03em; color:#fff; }
.hero-stats .stat .l{ font-size:.85rem; color:var(--text-faint); }

/* ---------- generic grids / cards ---------- */
.grid{ display:grid; gap:22px; }
.cols-2{ grid-template-columns:repeat(2,1fr); }
.cols-3{ grid-template-columns:repeat(3,1fr); }
.cols-4{ grid-template-columns:repeat(4,1fr); }
.card{
  background:linear-gradient(180deg,var(--bg-card),var(--bg-2));
  border:1px solid var(--border); border-radius:var(--radius);
  padding:26px; transition:.2s ease;
}
.card:hover{ border-color:color-mix(in srgb,var(--accent) 45%,var(--border)); transform:translateY(-3px); }
.card .ico{
  width:44px; height:44px; border-radius:11px; display:grid; place-items:center; margin-bottom:16px;
  background:color-mix(in srgb,var(--accent) 14%,transparent);
  border:1px solid color-mix(in srgb,var(--accent) 35%,transparent);
  color:var(--accent);
}
.card .ico svg{ width:22px; height:22px; }
.card h3{ margin-bottom:7px; }
.card p{ font-size:.95rem; }

/* ---------- persona cards (home) ---------- */
.persona-card{
  position:relative; display:flex; flex-direction:column; min-height:240px;
  background:linear-gradient(180deg,var(--bg-card),var(--bg-2));
  border:1px solid var(--border); border-radius:var(--radius); padding:26px; overflow:hidden;
  transition:.2s ease;
}
.persona-card::before{
  content:""; position:absolute; left:0; top:0; height:3px; width:100%;
  background:linear-gradient(90deg,var(--pa),transparent);
}
.persona-card:hover{ transform:translateY(-4px); border-color:color-mix(in srgb,var(--pa) 55%,var(--border)); box-shadow:0 18px 50px -22px color-mix(in srgb,var(--pa) 80%,transparent); }
.persona-card .tag{ font-size:.78rem; font-weight:700; letter-spacing:.12em; text-transform:uppercase; color:var(--pa); }
.persona-card h3{ font-size:1.32rem; margin:8px 0 6px; color:#fff; }
.persona-card p{ font-size:.95rem; flex:1; }
.persona-card .go{ margin-top:16px; color:var(--pa); font-weight:600; font-size:.93rem; display:inline-flex; align-items:center; gap:6px; }
.persona-card:hover .go .arr{ transform:translateX(4px); }
.go .arr{ transition:.18s; }

/* ---------- feature list / split ---------- */
.split{ display:grid; grid-template-columns:1.05fr .95fr; gap:54px; align-items:center; }
.checklist{ list-style:none; display:grid; gap:14px; }
.checklist li{ display:flex; gap:12px; align-items:flex-start; color:var(--text-dim); }
.checklist li b{ color:var(--text); font-weight:600; }
.check{
  flex:0 0 auto; width:22px; height:22px; border-radius:6px; margin-top:2px;
  display:grid; place-items:center; color:#06101f;
  background:var(--accent);
}
.check svg{ width:13px; height:13px; }

/* ---------- callout / quote ---------- */
.quote{
  border:1px solid var(--border); border-left:3px solid var(--accent);
  background:color-mix(in srgb,var(--accent) 8%,var(--bg-card));
  border-radius:0 var(--radius) var(--radius) 0; padding:24px 28px;
}
.quote p{ font-size:1.22rem; color:var(--text); font-weight:500; font-style:italic; }
.quote .by{ margin-top:8px; font-size:.85rem; color:var(--text-faint); font-style:normal; }

/* ---------- chips / pills ---------- */
.chips{ display:flex; flex-wrap:wrap; gap:10px; }
.chip{
  font-size:.85rem; font-weight:500; color:var(--text-dim);
  border:1px solid var(--border); background:var(--bg-elev);
  padding:7px 13px; border-radius:999px;
}
.chip b{ color:var(--text); font-weight:600; }

/* ---------- persona page hero band ---------- */
.persona-hero{ position:relative; padding:92px 0 64px; overflow:hidden; }
.persona-hero::before{
  content:""; position:absolute; inset:0; z-index:0;
  background:
    radial-gradient(820px 380px at 78% -20%,color-mix(in srgb,var(--accent) 30%,transparent),transparent 60%),
    linear-gradient(180deg,color-mix(in srgb,var(--accent) 6%,transparent),transparent 40%);
}
.persona-hero .container{ position:relative; z-index:1; }
.persona-kicker{ display:inline-flex; align-items:center; gap:9px; font-weight:700; letter-spacing:.04em; color:var(--accent); margin-bottom:18px; }
.persona-kicker .pill{ font-size:.72rem; text-transform:uppercase; letter-spacing:.14em; padding:4px 11px; border-radius:999px; border:1px solid color-mix(in srgb,var(--accent) 45%,transparent); background:color-mix(in srgb,var(--accent) 12%,transparent); }

/* ---------- value blocks ---------- */
.value{ display:grid; grid-template-columns:repeat(2,1fr); gap:26px; }
.value .v{ background:var(--bg-card); border:1px solid var(--border); border-radius:var(--radius); padding:24px 26px; }
.value .v .ico{ width:40px; height:40px; border-radius:10px; display:grid; place-items:center; color:var(--accent); background:color-mix(in srgb,var(--accent) 14%,transparent); border:1px solid color-mix(in srgb,var(--accent) 30%,transparent); margin-bottom:14px; }
.value .v .ico svg{ width:20px; height:20px; }
.value .v h3{ color:#fff; margin-bottom:6px; }
.value .v p{ font-size:.94rem; }

/* ---------- code sample ---------- */
.code{
  background:#0a0d13; border:1px solid var(--border); border-radius:var(--radius); overflow:hidden;
  font-family:var(--mono); font-size:.86rem;
}
.code .bar{ display:flex; gap:7px; padding:11px 15px; border-bottom:1px solid var(--border); background:#0d1119; }
.code .bar i{ width:11px; height:11px; border-radius:50%; display:inline-block; }
.code .bar .r{ background:#f4596b; } .code .bar .y{ background:#f5b13d; } .code .bar .g{ background:#3ad17a; }
.code pre{ padding:18px; overflow-x:auto; color:#c9d4e3; line-height:1.65; }
.code .k{ color:#7aa2ff; } .code .s{ color:#7ee0a8; } .code .c{ color:#5b6677; font-style:italic; } .code .t{ color:#5ad1e6; }

/* ---------- cta band ---------- */
.cta-band{
  position:relative; overflow:hidden; border-radius:22px; padding:54px;
  background:linear-gradient(120deg,color-mix(in srgb,var(--accent) 22%,var(--bg-elev)),var(--bg-elev));
  border:1px solid color-mix(in srgb,var(--accent) 35%,var(--border));
}
.cta-band h2{ max-width:20ch; }
.cta-band .lead{ max-width:50ch; margin-top:12px; }
.cta-band .hero-actions{ margin-top:26px; }

/* ---------- footer ---------- */
.footer{ border-top:1px solid var(--border-soft); padding:54px 0 40px; margin-top:30px; }
.footer-grid{ display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:30px; }
.footer h4{ font-size:.82rem; text-transform:uppercase; letter-spacing:.1em; color:var(--text-faint); margin-bottom:14px; }
.footer a{ display:block; color:var(--text-dim); font-size:.92rem; padding:4px 0; }
.footer a:hover{ color:#fff; }
.footer .brand{ margin-bottom:14px; }
.footer .fine{ display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px; margin-top:40px; padding-top:22px; border-top:1px solid var(--border-soft); color:var(--text-faint); font-size:.85rem; }

/* ---------- divider label ---------- */
.section-head{ max-width:640px; margin-bottom:42px; }
.section-head.center{ margin-left:auto; margin-right:auto; }

/* ---------- responsive ---------- */
@media (max-width:920px){
  .cols-4{ grid-template-columns:repeat(2,1fr); }
  .cols-3{ grid-template-columns:repeat(2,1fr); }
  .split{ grid-template-columns:1fr; gap:34px; }
  .value{ grid-template-columns:1fr; }
  .footer-grid{ grid-template-columns:1fr 1fr; }
}
@media (max-width:680px){
  .cols-2,.cols-3,.cols-4{ grid-template-columns:1fr; }
  .section{ padding:60px 0; }
  .hamburger{ display:flex; flex-direction:column; gap:5px; width:38px; height:38px; border:1px solid var(--border); border-radius:9px; align-items:center; justify-content:center; cursor:pointer; }
  .hamburger span{ width:18px; height:2px; background:var(--text); border-radius:2px; }
  .nav-links{
    position:absolute; left:0; right:0; top:66px; flex-direction:column; align-items:stretch; gap:2px;
    background:var(--bg-2); border-bottom:1px solid var(--border); padding:12px 16px 18px;
    max-height:0; overflow:hidden; transition:max-height .25s ease, padding .25s ease; padding-top:0; padding-bottom:0;
  }
  .nav-toggle:checked ~ .nav-links{ max-height:420px; padding-top:12px; padding-bottom:18px; }
  .nav-links a{ padding:11px 12px; }
  .nav-cta{ margin-left:0; }
  .cta-band{ padding:34px 24px; }
  .footer-grid{ grid-template-columns:1fr 1fr; }
  .hero-stats{ gap:24px; }
}