/* ============================================================
   VertexSMS shared base — chrome, footer, typography, buttons.
   Keep in sync with design9-v3-light.html (the single-file landing).
   ============================================================ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#FBFBFC;
  --bg-2:#F2F2F5;
  --bg-3:#E8E8ED;
  --ink:#141518;
  --ink-2:#4B5159;
  --ink-3:#8A909A;
  --rule:rgba(20,21,24,0.09);
  --rule-2:rgba(20,21,24,0.18);
  --signal:#0099CC;
  --signal-dim:rgba(0,153,204,0.22);
  --mag:#CC00BB;
  --amber:#B8650A;
  --red:#C23641;
  --display:'Inter Tight','Inter Tight Fallback',system-ui,-apple-system,sans-serif;
  --mono:'JetBrains Mono','JetBrains Mono Fallback',ui-monospace,Menlo,Consolas,monospace;
  --serif:'Instrument Serif','Instrument Serif Fallback',Georgia,serif;
}
html{scroll-behavior:smooth;overflow-x:hidden}
body{
  font-family:var(--display);background:var(--bg);color:var(--ink);
  line-height:1.45;-webkit-font-smoothing:antialiased;overflow-x:hidden;
  font-feature-settings:"ss01","cv11","tnum";
  font-size:15px;
}
a{color:inherit;text-decoration:none}
::selection{background:var(--signal);color:#fff}

body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:1;
  background:repeating-linear-gradient(
    to bottom,
    transparent 0, transparent 3px,
    rgba(20,21,24,0.025) 3px, rgba(20,21,24,0.025) 4px
  );
}

/* ============== CHROME / TOP BAR ============== */
.chrome{
  position:sticky;top:0;z-index:50;
  border-bottom:1px solid var(--rule);
  background:rgba(251,251,252,0.92);backdrop-filter:blur(12px);
  font-family:var(--mono);font-size:12px;
}
.chrome-row{
  max-width:1320px;margin:0 auto;padding:0 24px;
  display:grid;grid-template-columns:auto 1fr auto;gap:28px;align-items:center;
  height:48px;
}
.chrome-left{display:flex;align-items:center;gap:18px}
.brand{display:flex;align-items:center;gap:8px;font-weight:600;color:var(--ink)}
.brand-logo{display:block;height:22px;width:auto;color:#2d2b36}
.brand-est{
  font-family:var(--mono);font-weight:400;font-size:11px;
  color:var(--ink-3);letter-spacing:0;white-space:nowrap;
}
.chrome-mid{display:flex;gap:2px;justify-content:center}
.chrome-mid > a,
.chrome-mid > .has-pop > a{
  padding:14px 14px;color:var(--ink-2);font-weight:500;letter-spacing:-0.01em;
  display:inline-flex;align-items:center;gap:6px;cursor:pointer;
  font-family:var(--mono);font-size:12px;
  transition:color .12s;
}
.chrome-mid > a:hover,
.chrome-mid > .has-pop > a:hover{color:var(--ink)}
.chrome-mid .caret{font-size:10px;color:var(--ink-3)}
.has-pop{position:relative}
.menu-pop{
  position:absolute;left:0;top:calc(100% + 0px);
  background:var(--bg);border:1px solid var(--rule-2);
  min-width:280px;display:none;flex-direction:column;
  box-shadow:0 12px 28px rgba(20,21,24,0.10);z-index:60;
}
.has-pop:hover .menu-pop,
.has-pop:focus-within .menu-pop{display:flex}
.menu-pop a{
  display:flex;align-items:center;gap:12px;padding:12px 14px;
  border-bottom:1px solid var(--rule);
  font-family:var(--display);font-size:13.5px;font-weight:500;color:var(--ink);
}
.menu-pop a:last-child{border-bottom:none}
.menu-pop a:hover{background:var(--bg-2)}
.menu-pop .ico{
  width:22px;display:inline-flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-size:14px;color:var(--signal);
}
.menu-pop .row-text{display:flex;flex-direction:column;gap:1px;flex:1}
.menu-pop .row-sub{font-family:var(--mono);font-size:10px;color:var(--ink-3);letter-spacing:.04em}
.menu-pop a.disabled{opacity:.45;pointer-events:none}
.menu-pop .soon{
  display:inline-flex;align-items:center;
  margin-left:auto;
  padding:1px 6px;font-family:var(--mono);font-size:9px;
  letter-spacing:.08em;text-transform:uppercase;
  background:var(--bg-3);color:var(--ink-3);
  border:1px solid var(--rule-2);
}
.foot-links a.disabled{opacity:.45;pointer-events:none;display:inline-flex;align-items:center;gap:6px}
.foot-links .soon-inline{
  font-family:var(--mono);font-size:9px;letter-spacing:.08em;text-transform:uppercase;
  padding:1px 5px;background:var(--bg-3);color:var(--ink-3);border:1px solid var(--rule-2);
}
.chrome-right{display:flex;align-items:center;gap:16px}
.chrome-right a{color:var(--ink-2)}
.chrome-right a:hover{color:var(--ink)}
.btn-sig{
  background:var(--signal);color:#fff !important;font-weight:700;
  padding:7px 14px;font-size:12px;letter-spacing:-0.01em;
  font-family:var(--mono);font-weight:600;
  display:inline-flex;align-items:center;gap:6px;
  transition:background .15s,transform .15s;
  white-space:nowrap;
}
.btn-sig:hover{background:#007AA3;color:#fff !important;transform:translate(-1px,-1px);box-shadow:3px 3px 0 var(--ink)}

/* burger */
.burger{
  display:none;
  width:36px;height:36px;
  align-items:center;justify-content:center;
  background:transparent;border:1px solid var(--rule-2);
  cursor:pointer;padding:0;flex-shrink:0;
  transition:background .15s, border-color .15s;
}
.burger:hover{background:var(--bg-2)}
.burger-bars{position:relative;width:16px;height:12px;display:block}
.burger-bars::before,
.burger-bars::after,
.burger-bars > span{
  content:"";position:absolute;left:0;right:0;height:1.5px;background:var(--ink);
  transition:transform .2s ease, top .2s ease, opacity .15s ease;
}
.burger-bars::before{top:0}
.burger-bars > span{top:5px}
.burger-bars::after{top:10px}
.mobile-nav{
  display:none;
  position:fixed;left:0;right:0;top:48px;bottom:0;
  background:rgba(251,251,252,0.985);backdrop-filter:blur(14px);
  z-index:49;padding:18px 20px 28px;overflow-y:auto;
  flex-direction:column;gap:4px;border-top:1px solid var(--rule);
}
.mobile-nav.open{display:flex}
body.nav-open{overflow:hidden}
body.nav-open .chrome{position:fixed;top:0;left:0;right:0;z-index:60}
body.nav-open .burger-bars::before{top:5px;transform:rotate(45deg)}
body.nav-open .burger-bars::after{top:5px;transform:rotate(-45deg)}
body.nav-open .burger-bars > span{opacity:0}
.mobile-nav .mn-group{
  display:flex;flex-direction:column;
  border-bottom:1px solid var(--rule);padding:12px 0;
}
.mobile-nav .mn-group:last-of-type{border-bottom:none}
.mobile-nav .mn-h{
  font-family:var(--mono);font-size:10px;
  letter-spacing:.12em;text-transform:uppercase;
  color:var(--ink-3);margin-bottom:8px;padding:0 4px;
}
.mobile-nav a{
  display:flex;align-items:center;gap:10px;padding:11px 8px;
  font-weight:500;font-size:15px;letter-spacing:-0.01em;color:var(--ink);
  border:1px solid transparent;
}
.mobile-nav a:hover{background:var(--bg-2);border-color:var(--rule)}
.mobile-nav a.disabled{opacity:.45;pointer-events:none}
.mobile-nav .ico{
  width:22px;display:inline-flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-size:14px;color:var(--signal);flex-shrink:0;
}
.mobile-nav .mn-soon{
  margin-left:auto;
  font-family:var(--mono);font-size:9px;letter-spacing:.08em;text-transform:uppercase;
  padding:2px 6px;background:var(--bg-3);color:var(--ink-3);border:1px solid var(--rule-2);
}
.mobile-nav .mn-cta{
  margin-top:18px;padding:14px;
  background:var(--signal);color:#fff;font-family:var(--mono);font-weight:600;
  text-align:center;font-size:14px;border:none;
  display:flex;align-items:center;justify-content:center;gap:6px;
}
.mobile-nav .mn-cta:hover{background:#007AA3;color:#fff}

/* ===== shared content layout ===== */
.wrap{max-width:1320px;margin:0 auto;padding:0 24px}

/* page hero — bold-dark + magenta-italic treatment */
.page-hero{
  padding:80px 0 64px;border-bottom:1px solid var(--rule);
  position:relative;z-index:2;
}
h1.page-h1{
  font-family:var(--display);font-weight:700;
  font-size:clamp(2.4rem,6.4vw,5.2rem);
  line-height:0.98;letter-spacing:-0.04em;color:var(--ink);
  font-variation-settings:"wdth" 100;max-width:18ch;
}
h1.page-h1 em{
  font-family:var(--serif);font-style:italic;font-weight:400;
  color:var(--mag);letter-spacing:-0.02em;
}
.page-eyebrow{
  font-family:var(--mono);font-size:12px;color:var(--signal);
  letter-spacing:.05em;margin-bottom:18px;
  display:inline-flex;align-items:center;gap:10px;
}
.page-eyebrow::before{content:"[";color:var(--ink-3)}
.page-eyebrow::after{content:"]";color:var(--ink-3)}

/* shared section header */
.sec-head{
  display:grid;grid-template-columns:auto 1fr;gap:40px;align-items:end;
  margin-bottom:48px;padding-bottom:24px;border-bottom:1px solid var(--rule);
}
.sec-num{
  font-family:var(--mono);font-size:11px;color:var(--ink-3);letter-spacing:.12em;text-transform:uppercase;
}
.sec-num b{color:var(--signal);font-weight:500}
.sec-h{
  font-family:var(--display);font-weight:600;
  font-size:clamp(1.9rem,3.2vw,2.7rem);line-height:1.05;letter-spacing:-0.03em;
  color:var(--ink);
}
.sec-h em{font-family:var(--serif);font-style:italic;font-weight:400;color:var(--mag)}
.sec-dek{
  font-size:15px;color:var(--ink-2);line-height:1.55;max-width:460px;
  justify-self:end;padding-left:32px;border-left:1px solid var(--rule);
}

/* primary / ghost buttons */
.btn-primary{
  background:var(--signal);color:#fff;
  font-family:var(--mono);font-size:13px;font-weight:700;letter-spacing:.01em;
  padding:14px 22px;display:inline-flex;align-items:center;gap:10px;
  transition:transform .15s,box-shadow .15s,background .15s;
  position:relative;
}
.btn-primary:hover{transform:translate(-2px,-2px);box-shadow:4px 4px 0 var(--ink);background:#007AA3}
.btn-primary .arr{font-family:var(--mono);font-weight:400}
.btn-ghost{
  background:#fff;color:var(--ink);border:1px solid var(--rule-2);
  font-family:var(--mono);font-size:13px;font-weight:500;
  padding:13px 20px;display:inline-flex;align-items:center;gap:10px;
  transition:border-color .15s,color .15s;
}
.btn-ghost:hover{border-color:var(--signal);color:var(--signal)}

/* ===== FOOTER ===== */
.foot{padding:48px 0 32px;border-top:1px solid var(--rule);position:relative;z-index:2}
.foot-grid{
  display:grid;grid-template-columns:1.8fr repeat(3,1fr);gap:40px;
  margin-bottom:40px;
}
.foot-brand .brand{margin-bottom:18px}
.foot-brand .brand .brand-logo{height:24px}
.foot-brand p{font-size:13.5px;color:var(--ink-2);line-height:1.6;max-width:320px;margin-bottom:18px}
.foot-co{
  font-family:var(--mono);font-size:12px;color:var(--ink-2);line-height:1.6;
  margin-bottom:16px;
}
.foot-co-h{color:var(--ink);font-weight:600;letter-spacing:.04em;margin-bottom:4px}
.foot-contacts{
  display:flex;flex-direction:column;gap:4px;margin-bottom:18px;
  font-family:var(--mono);font-size:12.5px;
}
.foot-contacts a{color:var(--signal);transition:color .15s}
.foot-contacts a:hover{color:#007AA3}
.foot-sys{
  font-family:var(--mono);font-size:11px;color:var(--ink-3);letter-spacing:.04em;
  display:flex;flex-direction:column;gap:4px;
}
.foot-sys > div{display:flex;justify-content:space-between;gap:20px;padding:4px 0;border-bottom:1px dashed var(--rule)}
.foot-sys b{color:var(--signal);font-weight:500}
.foot-sys .warn{color:var(--amber)}
.foot-h{
  font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--ink-3);padding-bottom:10px;border-bottom:1px solid var(--rule);margin-bottom:14px;
}
.foot-links{list-style:none;display:flex;flex-direction:column;gap:8px}
.foot-links a{font-size:13.5px;color:var(--ink-2);transition:color .15s}
.foot-links a:hover{color:var(--signal)}
.foot-bot{
  padding-top:20px;border-top:1px solid var(--rule);
  display:flex;justify-content:space-between;align-items:center;
  font-family:var(--mono);font-size:11px;color:var(--ink-3);letter-spacing:.02em;
}
.foot-bot b{color:var(--ink-2)}
.foot-bot .right{display:flex;gap:16px}
.foot-bot .right a:hover{color:var(--ink)}

/* ===== TOAST ===== */
.toast{
  position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(12px);
  background:var(--ink);color:var(--signal);padding:10px 16px;
  font-family:var(--mono);font-size:12px;font-weight:600;letter-spacing:-0.01em;
  opacity:0;transition:all .2s ease;z-index:1000;pointer-events:none;
  border:1px solid rgba(20,21,24,0.25);box-shadow:0 6px 24px rgba(20,21,24,0.18);
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ===== RESPONSIVE ===== */
@media (max-width:1200px){
  .chrome-row{gap:18px}
  .chrome-left .brand-est{display:none}
  .chrome-mid > a,
  .chrome-mid > .has-pop > a{padding:14px 10px}
}
@media (max-width:980px){
  .chrome-mid{display:none}
  .chrome-right{display:none}
  .chrome-row{grid-template-columns:auto auto;gap:12px;justify-content:space-between}
  .chrome-left{gap:10px}
  .burger{display:inline-flex}
  .sec-head{grid-template-columns:1fr;gap:14px}
  .sec-dek{border-left:none;padding-left:0;padding-top:14px;border-top:1px solid var(--rule);justify-self:stretch;max-width:none}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px}
  .foot-brand{grid-column:1/-1}
  .foot-bot{flex-direction:column;gap:12px;text-align:center}
}
@media (max-width:560px){
  .wrap{padding:0 16px}
  .chrome-row{padding:0 16px;gap:8px}
  .btn-sig{padding:6px 10px;font-size:11px;white-space:nowrap}
  .chrome-right{gap:10px}
  .chrome-right > a:not(.btn-sig){font-size:12px}
  .brand-logo{height:18px}
  .brand-est{display:none}
  h1.page-h1{font-size:clamp(2.1rem,10vw,3.2rem)}
  .foot-grid{grid-template-columns:1fr}
  .page-hero{padding:48px 0 36px}
}