/* ============================================================
   ARMS — shared design system
   Blueprint / engineering aesthetic. Used across every page.
   ============================================================ */
:root{
  --w:#ffffff;
  --paper:#fafafa;
  --g1:#f0f0f0;
  --g2:#e2e2e2;
  --g3:#c4c4c4;
  --g4:#8a8a8a;
  --g5:#555555;
  --ink:#141414;
  --go:#1f9d57;
  --go-soft:rgba(31,157,87,.08);
  --alarm:#d62828;
  --hair:1px solid var(--g2);
  --mono:'IBM Plex Mono','SFMono-Regular',Consolas,monospace;
  --sans:'Space Grotesk','Helvetica Neue',Arial,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  overflow-x:hidden;
}
::selection{background:var(--ink);color:var(--w)}
a{color:inherit}

/* ---------- background blueprint grid ---------- */
.grid-bg{
  position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(var(--g1) 1px,transparent 1px),
    linear-gradient(90deg,var(--g1) 1px,transparent 1px);
  background-size:48px 48px;
  background-position:center top;
  mask-image:linear-gradient(180deg,transparent 0,#000 60px,#000 calc(100% - 60px),transparent 100%);
  -webkit-mask-image:linear-gradient(180deg,transparent 0,#000 60px,#000 calc(100% - 60px),transparent 100%);
  opacity:0;animation:gridIn 1.6s .2s ease forwards;
}
.col-guides{position:fixed;inset:0;z-index:0;pointer-events:none;opacity:0;animation:gridIn 1.6s .4s ease forwards}
.col-guides::before,.col-guides::after{content:"";position:fixed;top:0;bottom:0;width:1px;background:var(--g2)}
.col-guides::before{left:32px}
.col-guides::after{right:32px}
@media(max-width:760px){.col-guides::before{left:18px}.col-guides::after{right:18px}}
@keyframes gridIn{to{opacity:1}}

/* ---------- scroll progress ---------- */
#progress{position:fixed;top:0;left:0;height:2px;background:var(--ink);width:0;z-index:1000;transition:width .08s linear}
#progress::after{content:"";position:absolute;right:-3px;top:-3px;width:8px;height:8px;background:var(--ink);transform:rotate(45deg)}

/* ---------- annotation primitives ---------- */
.anno{font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--g4)}
.anno b{color:var(--ink)}
.tick{display:inline-block;width:8px;height:8px;border:1px solid var(--g4);margin-right:8px;vertical-align:-1px}
.dim{position:relative;font-family:var(--mono);font-size:10px;color:var(--g4)}

/* ---------- corner registration marks ---------- */
.regmark{position:fixed;width:18px;height:18px;z-index:950;pointer-events:none;opacity:0;animation:fadeIn 1s 2s forwards}
.regmark::before,.regmark::after{content:"";position:absolute;background:var(--g3)}
.regmark::before{width:100%;height:1px;top:50%}
.regmark::after{width:1px;height:100%;left:50%}
.regmark.tl{top:74px;left:10px}.regmark.tr{top:74px;right:10px}
.regmark.bl{bottom:10px;left:10px}.regmark.br{bottom:10px;right:10px}
@keyframes fadeIn{to{opacity:1}}

/* ---------- nav ---------- */
nav{
  position:fixed;top:0;left:0;right:0;z-index:900;
  display:flex;align-items:center;justify-content:space-between;
  padding:0 32px;height:64px;
  border-bottom:var(--hair);
  background:rgba(250,250,250,.82);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  transform:translateY(-100%);animation:navIn .8s .25s cubic-bezier(.2,.9,.2,1) forwards;
}
@keyframes navIn{to{transform:translateY(0)}}
.logo{display:flex;align-items:center;gap:12px;font-weight:700;letter-spacing:.28em;font-size:15px;text-decoration:none;color:var(--ink)}
.logo .mark{width:26px;height:26px;border:1.5px solid var(--ink);position:relative;display:inline-block}
.logo .mark::before{content:"";position:absolute;inset:5px;border:1.5px solid var(--ink)}
.logo .mark::after{content:"";position:absolute;width:5px;height:5px;background:var(--ink);left:50%;top:50%;transform:translate(-50%,-50%);animation:beat 2.4s infinite}
@keyframes beat{0%,100%{transform:translate(-50%,-50%) scale(1)}50%{transform:translate(-50%,-50%) scale(1.7)}}
.nav-links{display:flex;gap:34px}
.nav-links a{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--g5);text-decoration:none;position:relative;padding:4px 0}
.nav-links a::after{content:"";position:absolute;left:0;bottom:0;width:100%;height:1px;background:var(--ink);transform:scaleX(0);transform-origin:right;transition:transform .35s cubic-bezier(.2,.9,.2,1)}
.nav-links a:hover{color:var(--ink)}
.nav-links a.current{color:var(--ink)}
.nav-links a.current::after,.nav-links a:hover::after{transform:scaleX(1);transform-origin:left}
.nav-cta{font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;border:1px solid var(--ink);background:transparent;color:var(--ink);padding:10px 18px;transition:background .25s,color .25s;text-decoration:none;cursor:pointer;display:inline-block}
.nav-cta:hover{background:var(--ink);color:var(--w)}
@media(max-width:860px){.nav-links{display:none}}

/* mobile nav */
.nav-toggle{display:none}
@media(min-width:861px){ .nav-toggle,.nav-menu{display:none!important} }
@media(max-width:860px){
  .nav-cta{display:none}
  .nav-toggle{display:inline-flex;flex-direction:column;justify-content:center;gap:4px;margin-left:auto;
    width:44px;height:40px;padding:0 9px;border:1px solid var(--ink);background:var(--paper);border-radius:3px;cursor:pointer}
  .nav-toggle span{display:block;height:1.7px;background:var(--ink);transition:transform .3s,opacity .25s}
  nav.open .nav-toggle span:nth-child(1){transform:translateY(5.7px) rotate(45deg)}
  nav.open .nav-toggle span:nth-child(2){opacity:0}
  nav.open .nav-toggle span:nth-child(3){transform:translateY(-5.7px) rotate(-45deg)}
  .nav-menu{position:absolute;left:0;right:0;top:100%;display:flex;flex-direction:column;gap:0;
    padding:0 18px;background:rgba(250,250,250,.97);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
    border-bottom:var(--hair);max-height:0;overflow:hidden;opacity:0;
    transition:max-height .38s cubic-bezier(.2,.9,.2,1),opacity .25s,padding .38s}
  nav.open .nav-menu{max-height:420px;opacity:1;padding:6px 18px 14px}
  .nav-menu a{font-family:var(--mono);font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--g5);
    text-decoration:none;padding:14px 2px;border-bottom:1px solid var(--g1)}
  .nav-menu a:active,.nav-menu a.current{color:var(--ink)}
  .nav-menu .nav-cta-m{margin-top:12px;border:1px solid var(--ink);color:var(--ink);text-align:center;border-radius:3px;padding:14px}
}

/* ---------- shared section frame ---------- */
section{position:relative;z-index:1}
.frame{max-width:1280px;margin:0 auto;padding:0 32px;position:relative}
.sec-head{display:flex;align-items:baseline;justify-content:space-between;border-bottom:var(--hair);padding-bottom:14px;margin-bottom:56px;gap:18px;flex-wrap:wrap}
.rule-draw{position:relative}
.rule-draw::after{content:"";position:absolute;left:0;bottom:-1px;height:1px;width:100%;background:var(--ink);transform:scaleX(0);transform-origin:left;transition:transform 1.1s cubic-bezier(.2,.9,.2,1)}
.inview .rule-draw::after{transform:scaleX(1)}

/* reveal primitives */
.rv{opacity:0;transform:translateY(28px);transition:opacity .9s cubic-bezier(.2,.9,.2,1),transform .9s cubic-bezier(.2,.9,.2,1)}
.inview .rv{opacity:1;transform:none}
.rv.d1{transition-delay:.1s}.rv.d2{transition-delay:.22s}.rv.d3{transition-delay:.34s}.rv.d4{transition-delay:.46s}.rv.d5{transition-delay:.58s}.rv.d6{transition-delay:.7s}
@media(prefers-reduced-motion:reduce){.rv{opacity:1;transform:none;transition:none}}

/* ---------- type ---------- */
h1{font-size:clamp(38px,4.8vw,64px);line-height:1.0;letter-spacing:-.03em;font-weight:600}
h1 .hollow{color:transparent;-webkit-text-stroke:1.5px var(--ink)}
h2{font-weight:600;letter-spacing:-.02em}
h3{font-weight:600;letter-spacing:-.01em}

/* ---------- buttons ---------- */
.btn{
  position:relative;display:inline-flex;align-items:center;gap:10px;
  font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;
  padding:16px 26px;text-decoration:none;border:1px solid var(--ink);color:var(--ink);
  overflow:hidden;transition:color .3s;background:var(--paper);will-change:transform;cursor:pointer;
}
.btn::before{content:"";position:absolute;inset:0;background:var(--ink);transform:translateY(101%);transition:transform .35s cubic-bezier(.2,.9,.2,1);z-index:0}
.btn:hover::before{transform:translateY(0)}
.btn:hover{color:var(--w)}
.btn span{position:relative;z-index:1}
.btn.ghost{border-color:var(--g3);color:var(--g5)}
.btn.ghost:hover{color:var(--w)}

/* inverted (on black) */
.btn-w{position:relative;display:inline-flex;align-items:center;gap:10px;font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;padding:16px 26px;text-decoration:none;overflow:hidden;border:1px solid var(--w);background:var(--w);color:var(--ink);transition:color .3s;will-change:transform;cursor:pointer}
.btn-w span{position:relative;z-index:1}
.btn-w::before{content:"";position:absolute;inset:0;background:var(--ink);transform:translateY(101%);transition:transform .35s cubic-bezier(.2,.9,.2,1);z-index:0}
.btn-w:hover::before{transform:translateY(0)}
.btn-w:hover{color:var(--w)}
.btn-w.ghost{background:transparent;color:var(--g3);border-color:var(--g5)}
.btn-w.ghost::before{background:var(--w)}
.btn-w.ghost:hover{color:var(--ink)}

.hero-ctas{margin-top:26px;display:flex;gap:14px;flex-wrap:wrap}

/* ---------- live status marquee ---------- */
.marq{border-top:var(--hair);border-bottom:var(--hair);overflow:hidden;background:var(--w);padding:18px 0;position:relative;z-index:1}
.marq-inner{display:flex;width:max-content;animation:marq 30s linear infinite}
.marq:hover .marq-inner{animation-play-state:paused}
.marq-inner span{font-family:var(--mono);font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:var(--g4);padding:0 36px;border-right:var(--hair);white-space:nowrap;display:flex;align-items:center;gap:10px}
.st-led{width:6px;height:6px;border-radius:50%;background:var(--ink);flex:none;animation:beat 1.6s infinite}
.marq-inner span:nth-child(2n) .st-led{animation-delay:.4s}
.marq-inner span:nth-child(3n) .st-led{animation-delay:.8s}
@keyframes marq{to{transform:translateX(-50%)}}

/* ---------- stats ---------- */
.stats{display:grid;grid-template-columns:1fr;gap:0;border:var(--hair)}
.stats.band{grid-template-columns:repeat(4,1fr)}
@media(max-width:780px){.stats.band{grid-template-columns:repeat(2,1fr)}}
.stat{display:flex;align-items:baseline;justify-content:space-between;padding:26px 28px;border-bottom:var(--hair);border-right:var(--hair);background:var(--w)}
.stats:not(.band) .stat{border-right:none}
.stats.band .stat:nth-child(4n){border-right:none}
.stat:last-child{border-bottom:none}
.stat .num{font-size:clamp(36px,4vw,54px);font-weight:600;letter-spacing:-.03em;font-variant-numeric:tabular-nums}
.stat .lbl{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--g4);text-align:right;max-width:46%;line-height:1.7}

/* ---------- page hero (interior pages) ---------- */
.phero{padding:150px 0 70px;position:relative}
.phero .kicker{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:30px}
.phero h1{max-width:14ch}
.phero .lead{margin-top:24px;max-width:560px;font-size:16px;line-height:1.6;color:var(--g5)}
.phero-meta{margin-top:30px;display:flex;border:var(--hair);max-width:620px;flex-wrap:wrap}
.phero-meta div{flex:1;min-width:140px;padding:14px 16px;border-right:var(--hair)}
.phero-meta div:last-child{border-right:none}
.phero-meta .k{font-family:var(--mono);font-size:9px;letter-spacing:.14em;text-transform:uppercase;color:var(--g4);margin-bottom:6px}
.phero-meta .v{font-size:13px;font-weight:500;line-height:1.35}

/* ---------- black CTA band ---------- */
.cta-black{background:var(--ink);color:var(--w);padding:96px 0;position:relative;overflow:hidden}
.cta-black::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);background-size:48px 48px}
.cta-black .frame{position:relative;z-index:2}
.cb-corner{position:absolute;width:13px;height:13px;border:1px solid var(--g5);z-index:2}
.cb-corner.tl{left:18px;top:18px;border-right:0;border-bottom:0}
.cb-corner.tr{right:18px;top:18px;border-left:0;border-bottom:0}
.cb-corner.bl{left:18px;bottom:18px;border-right:0;border-top:0}
.cb-corner.br{right:18px;bottom:18px;border-left:0;border-top:0}
.cta-black .anno.light{color:var(--g4)}
.cta-black .anno.light .tick{background:var(--go);border-color:var(--go)}
.cta-black h2{font-size:clamp(34px,5vw,68px);letter-spacing:-.025em;line-height:1.04;margin-top:18px}
.hollow-w{color:transparent;-webkit-text-stroke:1.2px var(--w)}
.cta-black p{max-width:580px;color:var(--g3);font-size:15.5px;line-height:1.65;margin-top:22px}
.cb-ctas{display:flex;gap:14px;flex-wrap:wrap;margin-top:38px}
.cb-meta{display:flex;gap:34px;flex-wrap:wrap;margin-top:46px;padding-top:22px;border-top:1px solid #2b2b2b;font-family:var(--mono);font-size:10px;letter-spacing:.14em;color:var(--g4)}
.cb-meta span{display:flex;align-items:center;gap:8px}
.cb-meta span::before{content:"";width:5px;height:5px;background:var(--go);border-radius:50%}
@media(max-width:640px){.cta-black{padding:70px 0}.cb-meta{gap:18px 24px}}

/* ---------- footer ---------- */
footer{border-top:var(--hair);background:var(--w);padding:48px 0 28px;position:relative;z-index:1}
.foot-grid{display:flex;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;gap:28px}
.foot-grid .anno{line-height:2}
.foot-grid a.anno{text-decoration:none;display:block;transition:color .2s}
.foot-grid a.anno:hover{color:var(--ink)}
.foot-col{display:flex;flex-direction:column}
.foot-col .h{color:var(--ink);margin-bottom:4px}
.foot-bottom{margin-top:44px;padding-top:18px;border-top:var(--hair);display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

/* ---------- generic reveal-grid card system ---------- */
.io{position:relative}

/* ---------- interior-page hero signal field ---------- */
.phero{overflow:hidden}
.phero .frame{position:relative;z-index:2}
.phero-fx{position:absolute;inset:0;z-index:0;pointer-events:none;
  -webkit-mask-image:linear-gradient(90deg,transparent 0,transparent 26%,#000 64%,#000 100%);
          mask-image:linear-gradient(90deg,transparent 0,transparent 26%,#000 64%,#000 100%);
  opacity:.92}
@media(max-width:820px){.phero-fx{display:none}}