/* ============================================================
   GAINZO — design system
   grounded in: real app (palette/UI) · facilpay (polish/hero)
   · cryptowl (minimal/line-art) · bdsn (editorial subpages)
   ============================================================ */

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:"Inter",system-ui,sans-serif;
  font-size:17px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
::selection{background:rgba(47,123,255,.35);color:#fff}

/* ---------- tokens ---------- */
:root{
  --bg:#04060D;
  --bg-1:#070B16;
  --bg-2:#0B1120;
  --ink:#EAF0FF;
  --muted:#8C97AE;
  --faint:#566177;
  --line:rgba(255,255,255,.09);
  --line-soft:rgba(255,255,255,.055);
  --glass:rgba(255,255,255,.028);
  --glass-2:rgba(255,255,255,.045);
  --blue:#2F7BFF;
  --blue-1:#5B9CFF;
  --blue-2:#1A4DBF;
  --green:#14F195;
  --cyan:#7FE0FF;
  --gold:#D6BC82;
  --mono:"JetBrains Mono",ui-monospace,monospace;
  --disp:"Inter",sans-serif;
  --maxw:1240px;
  --pad:clamp(20px,5vw,64px);
  --radius:22px;
}

/* ---------- type ---------- */
.eyebrow{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--blue-1);
  display:inline-flex;align-items:center;gap:.7em;
}
.eyebrow::before{
  content:"";width:26px;height:1px;background:linear-gradient(90deg,var(--blue),transparent);
}
.eyebrow.center::before{display:none}
.serif{
  font-family:"Instrument Serif","Georgia",serif;
  font-style:italic;font-weight:400;
  color:var(--blue-1);
}
h1,h2,h3{font-family:var(--disp);font-weight:600;line-height:1.02;letter-spacing:-.02em;color:#fff}
.display{
  font-family:var(--disp);font-weight:600;letter-spacing:-.03em;line-height:.98;
  font-size:clamp(44px,8vw,104px);color:#fff;
}
.h2{font-size:clamp(32px,5vw,64px);line-height:1.0;letter-spacing:-.025em}
.h3{font-size:clamp(22px,2.6vw,32px);letter-spacing:-.02em}
.lead{font-size:clamp(17px,1.6vw,21px);color:var(--muted);line-height:1.55;max-width:62ch}
.lead b,.lead strong{color:var(--ink);font-weight:600}
.mono-num{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.grad{
  background:linear-gradient(100deg,#fff 0%,#cfe0ff 40%,var(--blue-1) 70%,#fff 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}

/* ---------- layout ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding-left:var(--pad);padding-right:var(--pad)}
.section{position:relative;padding:clamp(70px,9vh,118px) 0}
.section.tight{padding:clamp(48px,6vh,78px) 0}
.divider{height:1px;background:var(--line-soft);max-width:var(--maxw);margin:0 auto}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.6em;
  font-size:15px;font-weight:600;letter-spacing:-.01em;
  padding:13px 22px;border-radius:100px;border:1px solid transparent;
  transition:transform .25s cubic-bezier(.2,.8,.2,1),background .25s,border-color .25s,box-shadow .25s;
}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 10px 36px -12px rgba(47,123,255,.8)}
.btn-primary:hover{background:#3b85ff;box-shadow:0 16px 46px -12px rgba(47,123,255,.95)}
.btn-ghost{background:rgba(255,255,255,.02);border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:rgba(255,255,255,.25);background:rgba(255,255,255,.05)}
.btn svg{width:16px;height:16px}

/* ---------- nav ---------- */
.nav{
  position:fixed;top:18px;left:0;right:0;z-index:90;
  display:flex;justify-content:center;pointer-events:none;
}
.nav-inner{
  pointer-events:auto;
  width:min(var(--maxw),calc(100% - 32px));
  display:flex;align-items:center;justify-content:space-between;
  padding:10px 12px 10px 18px;
  background:rgba(8,12,22,.62);
  border:1px solid var(--line);
  border-radius:100px;
  backdrop-filter:blur(18px) saturate(1.4);
  -webkit-backdrop-filter:blur(18px) saturate(1.4);
  transition:background .3s,border-color .3s;
}
.brand{display:flex;align-items:center;gap:9px;font-family:var(--disp);font-weight:600;font-size:19px;letter-spacing:-.03em;color:#fff}
.brand .dot{width:8px;height:8px;border-radius:50%;background:var(--blue);box-shadow:0 0 14px 1px var(--blue)}
.nav-links{display:flex;gap:4px;align-items:center}
.nav-links a{
  font-size:14px;color:var(--muted);padding:8px 14px;border-radius:100px;transition:color .2s,background .2s;
}
.nav-links a:hover,.nav-links a.active{color:#fff;background:rgba(255,255,255,.06)}
.nav-cta{display:flex;align-items:center;gap:10px}
@media(max-width:860px){.nav-links{display:none}}
/* mobile burger + menu */
.nav-burger{display:none;width:40px;height:40px;border-radius:50%;border:1px solid var(--line);background:rgba(255,255,255,.04);cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:4px;padding:0;margin-left:8px}
.nav-burger span{display:block;width:18px;height:1.6px;background:var(--ink);border-radius:2px;transition:transform .3s,opacity .3s}
.nav-burger.open span:nth-child(1){transform:translateY(5.6px) rotate(45deg)}
.nav-burger.open span:nth-child(2){opacity:0}
.nav-burger.open span:nth-child(3){transform:translateY(-5.6px) rotate(-45deg)}
@media(max-width:860px){.nav-burger{display:flex}}
.mobile-menu{position:fixed;inset:0;z-index:85;background:rgba(4,6,13,.975);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;opacity:0;pointer-events:none;transition:opacity .35s}
.mobile-menu.open{opacity:1;pointer-events:auto}
.mobile-menu a{font-family:var(--disp);font-size:30px;font-weight:600;color:#fff;letter-spacing:-.02em;padding:12px 16px;opacity:.92}
.mobile-menu a:active{opacity:.6}
.mobile-menu a.cta{margin-top:22px;background:var(--blue);border-radius:100px;padding:14px 36px;font-size:18px;box-shadow:0 10px 30px -10px var(--blue)}

/* ---------- corner HUD ---------- */
.hud{position:fixed;z-index:80;font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--faint);pointer-events:none}
.hud .on{color:var(--green)}
.hud-tr{top:104px;right:max(20px,calc((100vw - var(--maxw))/2 + 4px))}
.hud-bl{bottom:18px;left:max(20px,calc((100vw - var(--maxw))/2 + 4px))}
@media(max-width:980px){.hud{display:none}}

/* ---------- bdsn side tab ---------- */
.sidetab{position:fixed;right:0;top:50%;transform:translateY(-50%) rotate(180deg);writing-mode:vertical-rl;z-index:70;
  font-family:var(--mono);font-size:11px;letter-spacing:.28em;text-transform:uppercase;color:var(--faint);
  padding:18px 9px;border:1px solid var(--line-soft);border-right:0;border-radius:10px 0 0 10px;background:rgba(255,255,255,.02)}
@media(max-width:980px){.sidetab{display:none}}

/* ---------- footer ---------- */
.foot{border-top:1px solid var(--line-soft);padding:64px 0 40px;background:var(--bg)}
.foot-grid{display:flex;flex-wrap:wrap;gap:40px;justify-content:space-between;align-items:flex-start}
.foot-col h4{font-family:var(--mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--faint);margin-bottom:16px;font-weight:500}
.foot-col a{display:block;color:var(--muted);font-size:15px;padding:5px 0;transition:color .2s}
.foot-col a:hover{color:#fff}
.foot-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px;margin-top:54px;padding-top:24px;border-top:1px solid var(--line-soft);color:var(--faint);font-size:13px}
.foot-disc{max-width:60ch;color:var(--faint);font-size:13px;line-height:1.6;margin-top:10px}

/* ---------- reveal ---------- */
/* landmine #20b: default VISIBLE, only JS-tagged below-fold elements start hidden */
.rv{opacity:1;transform:none;transition:opacity .9s cubic-bezier(.2,.7,.2,1),transform .9s cubic-bezier(.2,.7,.2,1)}
.rv.pending{opacity:0;transform:translateY(26px)}
.rv.d1{transition-delay:.08s}.rv.d2{transition-delay:.16s}.rv.d3{transition-delay:.24s}.rv.d4{transition-delay:.32s}.rv.d5{transition-delay:.40s}
@media(prefers-reduced-motion:reduce){.rv,.rv.pending{opacity:1;transform:none;transition:none}}

/* ---------- glow utilities ---------- */
.glow-horizon{
  position:absolute;left:50%;top:-2px;transform:translateX(-50%);
  width:150vw;height:88vh;pointer-events:none;z-index:0;
  background:
    radial-gradient(46% 52% at 50% 30%,rgba(47,123,255,.40),transparent 70%),
    radial-gradient(70% 38% at 50% 2%,rgba(91,156,255,.85),rgba(47,123,255,.30) 38%,transparent 66%);
  filter:blur(4px);
}
.glow-horizon::after{
  content:"";position:absolute;left:50%;top:2px;transform:translateX(-50%);
  width:62%;height:3px;border-radius:50%;
  background:linear-gradient(90deg,transparent,#9cc4ff,transparent);
  box-shadow:0 0 60px 14px rgba(120,170,255,.65);
}
.glow-soft{position:absolute;pointer-events:none;z-index:0;border-radius:50%;filter:blur(80px);opacity:.5}