/* SITE CHROME — header, mobile sheet, footer and buttons shared by every page.
   Self-contained (tokens + local resets) so it sits safely on top of the legacy theme CSS. */
:root{
  --ink:#0B1020; --ink-2:#555E6E; --ink-3:#9AA1AD; --paper:#FFFFFF; --mist:#F4F5F7; --rule:#E4E7EB;
  --magenta:#E6007E; --orange:#F39200; --yellow:#FFC800; --green:#3AAA35; --cyan:#009FE3; --purple:#662483;
  --toronto:#E5322D; --montreal:#8A35AE; --teal:#0E3B47;
  --thread:linear-gradient(90deg,var(--magenta) 0 16.6%,var(--orange) 0 33.3%,var(--yellow) 0 50%,var(--green) 0 66.6%,var(--cyan) 0 83.3%,var(--purple) 0);
  --ease:cubic-bezier(.2,.8,.2,1); --ease-out:cubic-bezier(.16,1,.3,1);
  --gut:clamp(20px,3.9vw,56px); --max:1440px;
  --display:"Inter Tight","Geist",system-ui,sans-serif;
}
.nav,.nav *,.sheet,.sheet *,.foot26,.foot26 *{box-sizing:border-box;margin:0;padding:0}
.nav,.sheet,.foot26{font:400 17px/1.6 "Geist",system-ui,sans-serif;color:var(--ink);-webkit-font-smoothing:antialiased}
.nav a,.sheet a,.foot26 a{color:inherit;text-decoration:none}
.nav img,.foot26 img,.foot26 svg{display:block;max-width:100%}
.nav .wrap,.foot26 .wrap{overflow:visible;width:auto;max-width:var(--max);margin:0 auto;padding-left:var(--gut);padding-right:var(--gut)}
.nav .mono,.foot26 .mono,.sheet .mono{font-family:"Geist Mono",monospace;font-size:11.5px;letter-spacing:.14em;text-transform:uppercase}
.nav .thread,.foot26 .thread{height:3px;background:var(--thread)}

.btn{position:relative;display:inline-flex;align-items:center;gap:12px;height:56px;padding:0 28px;border-radius:999px;font-family:"Geist",system-ui,sans-serif;font-weight:600;font-size:16px;line-height:1;text-decoration:none;overflow:hidden;isolation:isolate;transition:color .4s var(--ease)}
.btn::before{content:"";position:absolute;inset:0;z-index:-1;transform:translateY(101%);transition:transform .5s var(--ease)}
.btn:hover::before{transform:none}
.btn .arr{transition:transform .4s var(--ease)}.btn:hover .arr{transform:translateX(4px)}
.btn-primary,.btn-primary:visited,.nav .btn-primary,.sheet .btn-primary{background:var(--magenta);color:#fff}.btn-primary::before{background:var(--ink)}.btn-primary:hover{color:#fff}
.btn-line{box-shadow:inset 0 0 0 1.5px var(--ink);color:var(--ink)}.btn-line::before{background:var(--ink)}.btn-line:hover{color:#fff}

/* NAV */
.nav{position:fixed;inset:0 0 auto;z-index:60;transition:background .4s}
.nav .wrap{display:flex;align-items:center;gap:28px;height:78px}
.nav .logo{position:relative;display:block;flex:none}
.nav .logo img{height:40px;width:auto;transition:filter .4s}
.nav ul{display:flex;gap:24px;list-style:none;margin-left:auto;font-size:15px;font-weight:500}
.nav ul>li{position:relative}
.nav ul>li>a{position:relative;display:block;padding:6px 0;color:var(--ink-2);white-space:nowrap;transition:color .3s}
.nav ul>li>a:hover{color:var(--ink)}
.nav ul>li>a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1.5px;background:var(--ink);transform:scaleX(0);transform-origin:right;transition:transform .45s var(--ease)}
.nav ul>li>a:hover::after{transform:scaleX(1);transform-origin:left}
.nav .has-sub>a{padding-right:14px}
.nav .has-sub>a::before{content:"";position:absolute;right:0;top:50%;width:6px;height:6px;margin-top:-5px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg)}
.nav .sub{position:absolute;left:-18px;top:100%;min-width:230px;padding:10px;margin-top:10px;background:#fff;border-radius:14px;box-shadow:0 24px 60px -18px rgba(11,16,32,.28),0 0 0 1px var(--rule);opacity:0;visibility:hidden;transform:translateY(6px);transition:opacity .25s,transform .3s var(--ease),visibility 0s .3s}
.nav .sub::before{content:"";position:absolute;left:0;right:0;top:-14px;height:14px}
.nav .sub a{display:block;padding:9px 12px;border-radius:9px;font-size:14.5px;color:var(--ink-2);white-space:nowrap;transition:background .2s,color .2s}
.nav .sub a:hover{background:var(--mist);color:var(--ink)}
.nav li:hover>.sub,.nav li:focus-within>.sub,.nav .lang:hover>.sub,.nav .lang:focus-within>.sub{opacity:1;visibility:visible;transform:none;transition:opacity .25s,transform .3s var(--ease)}
.nav .lang{position:relative;flex:none}
.nav .lang button{border:0;background:none;cursor:pointer;font:inherit;letter-spacing:inherit;color:var(--ink-2);padding:6px 0}
.nav .lang .sub{left:auto;right:-12px;min-width:170px}
.nav .btn{height:44px;padding:0 22px;font-size:14.5px;flex:none}
.nav .thread{position:absolute;left:0;right:0;bottom:0;transform:scaleX(0);transform-origin:left;transition:transform .9s var(--ease-out)}
.nav.solid{background:rgba(255,255,255,.84);backdrop-filter:blur(18px) saturate(1.3);-webkit-backdrop-filter:blur(18px) saturate(1.3)}
.nav.solid .thread{transform:scaleX(1)}
/* over dark scenes: smoked glass, white type, white wordmark (hexagon keeps its colour) */
.nav .logo::after{content:"";position:absolute;inset:0;background:url(../img/ats_logo_initials.png) left center/auto 100% no-repeat;clip-path:inset(0 61% 0 0);opacity:0;transition:opacity .4s}
.nav.on-dark{background:rgba(7,9,15,.5);backdrop-filter:blur(18px) saturate(1.4);-webkit-backdrop-filter:blur(18px) saturate(1.4)}
.nav.on-dark .thread{transform:scaleX(0)}
.nav.on-dark ul>li>a,.nav.on-dark .lang button{color:rgba(255,255,255,.72)}
.nav.on-dark ul>li>a:hover{color:#fff}
.nav.on-dark ul>li>a::after{background:#fff}
.nav.on-dark .logo img{filter:brightness(0) invert(1)}
.nav.on-dark .logo::after{opacity:1}
.nav.on-dark .burger span{background:#fff}
.menu-open .nav.on-dark{background:none;backdrop-filter:none;-webkit-backdrop-filter:none}
.menu-open .nav.on-dark .logo img{filter:none}.menu-open .nav.on-dark .logo::after{opacity:0}
.menu-open .nav.on-dark .burger span{background:var(--ink)}
.burger{display:none;margin-left:auto;width:44px;height:44px;border:0;background:none;cursor:pointer}
.burger span{display:block;width:22px;height:2px;background:var(--ink);margin:6px auto;transition:transform .4s var(--ease)}
.menu-open .burger span:first-child{transform:translateY(4px) rotate(45deg)}
.menu-open .burger span:last-child{transform:translateY(-4px) rotate(-45deg)}
.sheet{position:fixed;inset:0;z-index:55;background:#fff;padding:100px var(--gut) 40px;display:flex;flex-direction:column;overflow-y:auto;clip-path:inset(0 0 100% 0);visibility:hidden;transition:clip-path .7s var(--ease-out),visibility 0s .7s}
.menu-open .sheet{clip-path:inset(0);visibility:visible;transition:clip-path .7s var(--ease-out)}
.menu-open{overflow:hidden}
.sheet>a:not(.btn){font-family:var(--display);font-weight:600;font-size:30px;letter-spacing:-.03em;border-top:1px solid var(--rule);padding:10px 0 8px}
.sheet-sub{display:flex;flex-wrap:wrap;gap:6px 18px;padding:0 0 12px}
.sheet-sub a{font-size:15px;color:var(--ink-2)}
.sheet-lang{display:flex;gap:18px;border-top:1px solid var(--rule);padding-top:16px;color:var(--ink-2)}

/* FOOTER */
.foot26{color:var(--ink-2);font-size:15px;background:#fff}
.foot26 .wrap{padding-top:70px;padding-bottom:36px}
.foot26 .cols{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.foot26 h4{font-family:"Geist Mono",monospace;font-weight:500;font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink);margin-bottom:16px}
.foot26 ul{list-style:none}
.foot26 li{list-style:none;margin:7px 0}
.foot26 li a{transition:color .2s}
.foot26 li a:hover,.foot26 .legal a:hover{color:var(--ink)}
.foot26 .family{margin-top:18px;max-width:360px;line-height:1.6}
.foot26 .family a{color:var(--ink);border-bottom:1px solid var(--rule)}
.foot26 .social{display:flex;gap:10px;margin-top:22px}
.foot26 .social a{display:grid;place-items:center;width:40px;height:40px;border-radius:50%;box-shadow:inset 0 0 0 1px var(--rule);transition:background .2s,box-shadow .2s}
.foot26 .social a:hover{background:var(--ink);box-shadow:none}
.foot26 .social svg{width:18px;height:18px;fill:var(--ink-2);transition:fill .2s}
.foot26 .social a:hover svg{fill:#fff}
.foot26 .legal{display:flex;justify-content:space-between;gap:20px;margin-top:56px;padding-top:22px;border-top:1px solid var(--rule);font-size:13px}

@media (max-width:1240px){
  .nav .wrap{gap:20px}
  .nav ul{gap:18px;font-size:14px}
}
@media (max-width:1100px){
  .nav ul,.nav .btn,.nav .lang{display:none}
  .burger{display:block}
}
@media (max-width:900px){
  .foot26 .cols{grid-template-columns:repeat(2,minmax(0,1fr))}
  .foot26 .cols>div:first-child{grid-column:1/-1}
  .foot26 .legal{flex-direction:column}
}
@media (prefers-reduced-motion:reduce){
  .nav *,.sheet,.btn,.btn::before{transition:none!important}
}