/* ============================================================
   BIG DATA — bigdata.ventures
   Custom stylesheet (layered on top of Tailwind CDN)
   ------------------------------------------------------------
   COLOR SYSTEM — swap these tokens to match the client logo.
   The entire site (accents, gradients, hover, glow) derives
   from --accent / --accent-glow / --gold below.
   ============================================================ */

:root{
  --bg:        #070A0F;   /* obsidian base            */
  --bg-2:      #0B111A;   /* raised slate             */
  --surface:   #0F1621;   /* cards / panels           */
  --surface-2: #131C29;   /* elevated card            */
  --border:    rgba(255,255,255,.08);
  --border-2:  rgba(255,255,255,.14);
  --ink:       #EAF0F7;   /* primary text             */
  --muted:     #8A97A8;   /* secondary text           */
  --faint:     #5B6675;

  /* BRAND ACCENTS — extracted from the logo mark */
  --accent:      #0060FC;   /* electric blue node   */
  --accent-glow: #3030CC;   /* indigo node          */

  /* LABEL ACCENT — periwinkle derived from brand, for mono eyebrows */
  --gold:      #7E93FF;

  --grad-data: linear-gradient(120deg, var(--accent) 0%, var(--accent-glow) 100%);
  --grad-soft: linear-gradient(180deg, rgba(0,96,252,.14), rgba(48,48,204,.02));

  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body:    "Inter", system-ui, sans-serif;
  --font-mono:    "JetBrains Mono", ui-monospace, monospace;

  --maxw: 1240px;
}

*{ -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility; }
html{ scroll-behavior:smooth; }
@media (prefers-reduced-motion: reduce){ html{ scroll-behavior:auto; } }

body{
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-body);
  overflow-x:hidden;
}

/* selection */
::selection{ background:rgba(0,96,252,.35); color:#fff; }

/* ---------- Type ---------- */
.font-display{ font-family:var(--font-display); }
.font-mono{ font-family:var(--font-mono); }

.eyebrow{
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.28em;
  text-transform:uppercase;
  color:var(--gold);
  display:inline-flex;
  align-items:center;
  gap:.6rem;
}
.eyebrow::before{
  content:"";
  width:26px; height:1px;
  background:var(--gold);
  opacity:.7;
  display:inline-block;
}
[dir="rtl"] .eyebrow{ letter-spacing:normal; }

.display-xl{
  font-family:var(--font-display);
  font-weight:700;
  line-height:1.02;
  letter-spacing:-.02em;
}
[dir="rtl"] .display-xl,
[dir="rtl"] .font-display{ letter-spacing:0; }

/* gradient text */
.grad-text{
  background:var(--grad-data);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}

/* ---------- Layout ---------- */
.wrap{ max-width:var(--maxw); margin-inline:auto; padding-inline:1.5rem; }
.section{ padding-block:clamp(4.5rem, 9vw, 8rem); position:relative; }
.rule{ height:1px; background:var(--border); border:0; }

/* ---------- Navbar ---------- */
.nav{
  position:fixed; inset-block-start:0; inset-inline:0; z-index:60;
  transition:background .4s ease, border-color .4s ease, backdrop-filter .4s ease;
  border-block-end:1px solid transparent;
}
.nav.solid{
  background:rgba(7,10,15,.72);
  backdrop-filter:saturate(140%) blur(14px);
  border-block-end:1px solid var(--border);
}
.nav-link{
  color:var(--muted); font-size:.9rem; font-weight:500;
  position:relative; transition:color .25s ease;
}
.nav-link:hover, .nav-link:focus-visible{ color:var(--ink); }
.nav-link::after{
  content:""; position:absolute; inset-block-end:-6px; inset-inline-start:0;
  width:0; height:1px; background:var(--grad-data); transition:width .3s ease;
}
.nav-link:hover::after, .nav-link:focus-visible::after{ width:100%; }

.lang-switch{
  font-family:var(--font-mono); font-size:.78rem; letter-spacing:.12em;
  border:1px solid var(--border-2); border-radius:999px;
  padding:.35rem .85rem; color:var(--ink);
  transition:border-color .25s, background .25s;
}
.lang-switch:hover{ border-color:var(--accent); background:rgba(0,96,252,.08); }

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:.6rem;
  font-weight:600; font-size:.95rem; border-radius:10px;
  padding:.85rem 1.5rem; transition:transform .2s, box-shadow .3s, background .3s;
  will-change:transform;
}
.btn-primary{
  background:var(--grad-data); color:#04121f;
  box-shadow:0 10px 30px -12px rgba(0,96,252,.7);
}
.btn-primary:hover{ transform:translateY(-2px); box-shadow:0 16px 42px -12px rgba(48,48,204,.65); }
.btn-ghost{
  border:1px solid var(--border-2); color:var(--ink);
}
.btn-ghost:hover{ border-color:var(--accent); background:rgba(0,96,252,.06); transform:translateY(-2px); }
.btn svg{ transition:transform .25s; }
.btn:hover svg{ transform:translateX(3px); }
[dir="rtl"] .btn:hover svg{ transform:translateX(-3px); }

/* ---------- Hero ---------- */
.hero{ position:relative; min-height:100svh; display:flex; align-items:center; overflow:hidden; }
#hero-canvas{
  position:absolute; inset:0; width:100%; height:100%;
  z-index:0; opacity:.55;
}
.hero-veil{
  position:absolute; inset:0; z-index:1; pointer-events:none;
  background:
    radial-gradient(1100px 600px at 82% 20%, rgba(0,96,252,.20), transparent 60%),
    radial-gradient(900px 700px at 6% 92%, rgba(48,48,204,.16), transparent 62%),
    linear-gradient(180deg, rgba(7,10,15,.28) 0%, rgba(7,10,15,.66) 74%, var(--bg) 100%);
}
.hero .wrap{ position:relative; z-index:2; }
.hero-grid{ display:grid; grid-template-columns:1fr; gap:2rem; align-items:center; }
@media (min-width:1024px){ .hero-grid{ grid-template-columns:1.05fr .95fr; gap:3rem; } }

/* --- animated connection centerpiece (echoes the 2-node logo) --- */
.connect{ position:relative; width:100%; max-width:520px; margin-inline:auto; aspect-ratio:1/1; }
.connect svg{ width:100%; height:100%; overflow:visible; }
.node-ring{ transform-box:fill-box; transform-origin:center; }
.node-a .node-ring{ animation:pulseA 4s ease-in-out infinite; }
.node-b .node-ring{ animation:pulseB 4s ease-in-out infinite .6s; }
@keyframes pulseA{ 0%,100%{ opacity:.55; } 50%{ opacity:1; } }
@keyframes pulseB{ 0%,100%{ opacity:.55; } 50%{ opacity:1; } }
.node-glow{ filter:blur(14px); opacity:.55; animation:breathe 5s ease-in-out infinite; }
@keyframes breathe{ 0%,100%{ opacity:.35; } 50%{ opacity:.7; } }
.sat{ transform-box:fill-box; transform-origin:center; }
.orbit-a{ animation:spin 22s linear infinite; transform-box:view-box; transform-origin:31% 31%; }
.orbit-b{ animation:spin 28s linear infinite reverse; transform-box:view-box; transform-origin:69% 69%; }
@keyframes spin{ to{ transform:rotate(360deg); } }
.packet{
  offset-path:path("M188 188 C250 230, 230 250, 292 292");
  offset-rotate:0deg;
  animation:flow 2.8s cubic-bezier(.5,0,.5,1) infinite;
}
.packet.p2{ animation-delay:.9s; } .packet.p3{ animation-delay:1.8s; }
@keyframes flow{ 0%{ offset-distance:0%; opacity:0; } 12%{ opacity:1; } 88%{ opacity:1; } 100%{ offset-distance:100%; opacity:0; } }
.conduit{ stroke-dasharray:5 9; animation:dash 1.6s linear infinite; }
@keyframes dash{ to{ stroke-dashoffset:-28; } }
.node-label{
  font-family:var(--font-mono); font-size:11px; letter-spacing:.18em;
  text-transform:uppercase; fill:var(--ink);
}
.node-sub{ font-family:var(--font-body); font-size:12px; fill:var(--muted); }
@media (prefers-reduced-motion: reduce){
  .node-a .node-ring,.node-b .node-ring,.node-glow,.orbit-a,.orbit-b,.packet,.conduit{ animation:none; }
  .packet{ opacity:1; }
}
@media (max-width:1023px){ .connect{ max-width:400px; opacity:.96; } }

/* kinetic headline reveal */
.kinetic .line{ display:block; overflow:hidden; }
.kinetic .line > span{
  display:block;
  transform:translateY(110%);
  animation:rise .9s cubic-bezier(.16,.84,.32,1) forwards;
}
.kinetic .line:nth-child(1) > span{ animation-delay:.15s; }
.kinetic .line:nth-child(2) > span{ animation-delay:.30s; }
.kinetic .line:nth-child(3) > span{ animation-delay:.45s; }
@keyframes rise{ to{ transform:translateY(0); } }
@media (prefers-reduced-motion: reduce){
  .kinetic .line > span{ transform:none; animation:none; }
}

/* ---------- Reveal on scroll ---------- */
.reveal{ opacity:0; transform:translateY(26px); transition:opacity .7s ease, transform .7s cubic-bezier(.16,.84,.32,1); }
.reveal.in{ opacity:1; transform:none; }
.reveal.d1{ transition-delay:.08s; } .reveal.d2{ transition-delay:.16s; }
.reveal.d3{ transition-delay:.24s; } .reveal.d4{ transition-delay:.32s; }
@media (prefers-reduced-motion: reduce){ .reveal{ opacity:1; transform:none; } }

/* ---------- Cards ---------- */
.card{
  background:linear-gradient(180deg, var(--surface) 0%, rgba(15,22,33,.4) 100%);
  border:1px solid var(--border);
  border-radius:16px;
  padding:1.75rem;
  position:relative; overflow:hidden;
  transition:border-color .35s, transform .35s, background .35s;
}
.card::before{
  content:""; position:absolute; inset:0;
  background:radial-gradient(420px 200px at var(--mx,50%) var(--my,0%), rgba(0,96,252,.12), transparent 60%);
  opacity:0; transition:opacity .4s;
}
.card:hover{ border-color:var(--border-2); transform:translateY(-4px); }
.card:hover::before{ opacity:1; }
.card .num{
  font-family:var(--font-mono); font-size:.72rem; letter-spacing:.18em;
  color:var(--muted); opacity:.7;
}
.card .ico{
  width:46px; height:46px; border-radius:11px;
  display:grid; place-items:center; margin-block-end:1.1rem;
  background:rgba(0,96,252,.10);
  border:1px solid rgba(0,96,252,.28);
  color:var(--accent-glow);
}
.card h3{ font-family:var(--font-display); font-weight:600; font-size:1.15rem; margin-block-end:.5rem; }
.card p{ color:var(--muted); font-size:.95rem; line-height:1.6; }

/* sector card with gradient header */
.sector{
  border:1px solid var(--border); border-radius:18px; overflow:hidden;
  background:var(--surface); transition:border-color .35s, transform .35s;
}
.sector:hover{ border-color:var(--border-2); transform:translateY(-4px); }
.sector-head{ height:130px; position:relative; overflow:hidden; }
.sector-head .mesh{ position:absolute; inset:0; }
.sector-head .label{
  position:absolute; inset-block-end:.9rem; inset-inline-start:1.25rem;
  font-family:var(--font-mono); font-size:.7rem; letter-spacing:.2em;
  text-transform:uppercase; color:rgba(255,255,255,.85);
}
.sector-body{ padding:1.5rem 1.35rem 1.6rem; }
.sector-body h3{ font-family:var(--font-display); font-size:1.2rem; font-weight:600; margin-block-end:.85rem; }
.chip-row{ display:flex; flex-wrap:wrap; gap:.45rem; }
.chip{
  font-size:.76rem; color:var(--muted);
  border:1px solid var(--border); border-radius:999px;
  padding:.28rem .7rem; transition:border-color .25s, color .25s;
}
.sector:hover .chip{ border-color:var(--border-2); }

/* value list */
.vlist{ display:grid; gap:1px; background:var(--border); border:1px solid var(--border); border-radius:16px; overflow:hidden; }
.vrow{ background:var(--bg-2); padding:1.4rem 1.5rem; display:flex; gap:1.1rem; align-items:flex-start; transition:background .3s; }
.vrow:hover{ background:var(--surface); }
.vrow .k{ font-family:var(--font-mono); color:var(--accent-glow); font-size:.8rem; min-width:2.6rem; padding-block-start:.15rem; }
.vrow h4{ font-family:var(--font-display); font-weight:600; margin-block-end:.25rem; }
.vrow p{ color:var(--muted); font-size:.92rem; }

/* stat / advantage */
.adv{ border-inline-start:1px solid var(--border); padding-inline-start:1.5rem; }
[dir="rtl"] .adv{ border-inline-start:0; border-inline-end:1px solid var(--border); padding-inline-start:0; padding-inline-end:1.5rem; }
.adv h4{ font-family:var(--font-display); font-size:1.1rem; font-weight:600; margin-block:.4rem; }
.adv .k{ font-family:var(--font-mono); font-size:.72rem; letter-spacing:.16em; color:var(--gold); }
.adv p{ color:var(--muted); font-size:.93rem; line-height:1.6; }
.adv ul{ margin-block-start:.6rem; display:flex; flex-wrap:wrap; gap:.4rem; }
.adv ul li{ font-size:.78rem; color:var(--muted); border:1px solid var(--border); border-radius:999px; padding:.2rem .6rem; }

/* ---------- Form ---------- */
.field{ position:relative; }
.field label{ font-size:.82rem; color:var(--muted); margin-block-end:.4rem; display:block; }
.input{
  width:100%; background:var(--surface); border:1px solid var(--border);
  border-radius:10px; padding:.85rem 1rem; color:var(--ink); font-size:.95rem;
  transition:border-color .25s, box-shadow .25s;
}
.input:focus{ outline:none; border-color:var(--accent); box-shadow:0 0 0 3px rgba(0,96,252,.16); }
.input::placeholder{ color:#4e5a6b; }
textarea.input{ resize:vertical; min-height:130px; }
.form-note{ font-size:.85rem; }
.form-note.ok{ color:#4ade80; } .form-note.err{ color:#f87171; }
.hp{ position:absolute; left:-9999px; opacity:0; height:0; width:0; }

/* ---------- Footer ---------- */
.foot-link{ color:var(--muted); font-size:.9rem; transition:color .25s; }
.foot-link:hover{ color:var(--ink); }

/* ---------- Mobile overlay menu ---------- */
.overlay{
  position:fixed; inset:0; z-index:70;
  background:rgba(6,9,14,.96); backdrop-filter:blur(10px);
  display:flex; flex-direction:column; justify-content:center;
  gap:.4rem; padding:2rem;
  transform:translateY(-100%); transition:transform .5s cubic-bezier(.16,.84,.32,1);
}
.overlay.open{ transform:translateY(0); }
.overlay a{
  font-family:var(--font-display); font-size:clamp(1.8rem,7vw,2.6rem);
  font-weight:600; color:var(--ink); padding-block:.4rem;
  border-block-end:1px solid var(--border); transition:color .25s, padding-inline-start .25s;
}
.overlay a:hover{ color:var(--accent-glow); padding-inline-start:.6rem; }

/* utility */
.glow-divider{ height:1px; background:linear-gradient(90deg,transparent,var(--accent),transparent); opacity:.5; }
.grid-bg{
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(ellipse 70% 60% at 50% 40%, #000 30%, transparent 75%);
  mask-image:radial-gradient(ellipse 70% 60% at 50% 40%, #000 30%, transparent 75%);
}

/* focus visibility */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible{
  outline:2px solid var(--accent-glow); outline-offset:3px; border-radius:6px;
}