/* Shared structure for the concept pages. Each concept sets the variables and the look. */
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:400 var(--fs,18px)/1.65 var(--body);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
[hidden]{display:none!important}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:2px}
.skip{position:absolute;left:-9999px;top:8px;background:#fff;color:#000;padding:8px 14px;z-index:99}
.skip:focus{left:8px}

/* header: name, five links, one call button */
.hdr{position:sticky;top:0;z-index:50;background:var(--hdr-bg);color:var(--hdr-ink)}
.hdr .wrap{display:flex;align-items:center;gap:18px;min-height:68px}
.mark{font-family:var(--display);font-size:var(--mark-size,21px);font-weight:var(--mark-weight,600);letter-spacing:var(--mark-track,0);text-decoration:none;white-space:nowrap;margin-right:auto;line-height:1.1}
.nav>ul{display:flex;gap:2px;list-style:none;margin:0;padding:0}
.nav li{position:relative}
.nav>ul>li>a,.nav>ul>li>button{display:flex;align-items:center;gap:8px;font:500 var(--nav-size,15px)/1 var(--nav-font,var(--body));color:inherit;background:none;border:0;padding:12px 14px;cursor:pointer;text-decoration:none}
.nav>ul>li>a:hover,.nav>ul>li>button:hover{color:var(--accent)}
.has-sub>button:after,.has-sub>a:after{content:"";width:6px;height:6px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg) translateY(-2px)}
.sub{display:none;position:absolute;top:calc(100% - 6px);left:0;min-width:250px;padding:8px 0;list-style:none;margin:0;background:var(--sub-bg,var(--hdr-bg));box-shadow:0 18px 40px rgba(0,0,0,.3);border-top:2px solid var(--accent)}
.has-sub:hover>.sub,.has-sub:focus-within>.sub,.has-sub.open>.sub{display:block}
.sub a{display:block;padding:9px 20px;font:400 var(--nav-size,15px)/1.3 var(--nav-font,var(--body));text-decoration:none;color:var(--hdr-ink)}
.sub a:hover{background:rgba(255,255,255,.08);color:var(--accent)}
.call{background:var(--accent);color:var(--on-accent);font:700 15px/1 var(--nav-font,var(--body));text-decoration:none;padding:13px 18px;border-radius:var(--radius,3px);white-space:nowrap}
.call:hover{filter:brightness(1.08)}
.call-short{display:none}
.call-text{margin-left:8px;background:transparent;color:var(--accent);box-shadow:inset 0 0 0 2px var(--accent)}
.call-text:hover{background:var(--accent);color:var(--on-accent)}
.menu-btn{display:none;background:none;border:1px solid currentColor;color:var(--hdr-ink);font:600 14px/1 var(--nav-font,var(--body));padding:12px 14px;border-radius:var(--radius,3px);cursor:pointer}

/* shared content bits */
.prose p{margin:0 0 1.2em}
.video{position:relative;aspect-ratio:16/9;background:#000;overflow:hidden}
.video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
figure{margin:0}

/* footer */
.ftr{background:var(--ftr-bg);color:var(--ftr-ink);padding:64px 0 30px;font:400 15px/1.75 var(--nav-font,var(--body))}
.ftr a{color:var(--ftr-link);text-decoration:none}
.ftr a:hover{text-decoration:underline}
.ftr-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.ftr h2{font:600 20px/1.2 var(--display);margin:0 0 10px;color:#fff}
.ftr ul{list-style:none;margin:0;padding:0}
.ftr-more{border-top:1px solid rgba(255,255,255,.14);margin-top:36px;padding-top:22px}
.ftr-more p{margin:0 0 12px}
.ftr .fine{font-size:13.5px;opacity:.8}

@media (max-width:1180px){
  .menu-btn{display:block}
  .hdr .wrap{gap:10px}
  .mark{font-size:17px;white-space:normal;max-width:none;line-height:1.15}
  .mark .mk1,.mark .mk2{display:block}
  .nav{display:none;position:absolute;left:0;right:0;top:100%;background:var(--hdr-bg);padding:6px 24px 22px;max-height:80vh;overflow:auto;border-top:1px solid rgba(255,255,255,.14);box-shadow:0 20px 30px rgba(0,0,0,.3)}
  .nav.open{display:block}
  .nav>ul{flex-direction:column}
  .nav>ul>li>a,.nav>ul>li>button{padding:13px 0;width:100%}
  .has-sub>a:after{display:none}
  .nav>ul>li>button{justify-content:space-between}
  .sub{display:none;position:static;box-shadow:none;border:0;background:transparent;min-width:0;padding:0 0 8px 14px}
  .has-sub:hover>.sub{display:none}
  .has-sub.open>.sub,.has-sub>a+.sub{display:block}
  .call-full{display:none}
  .call-short{display:inline}
  .call{padding:12px 16px}
}
@media (max-width:980px){
  .ftr-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:560px){
  .ftr-grid{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important;scroll-behavior:auto!important}}

@media(min-width:761px) and (max-width:1699px){
  .call .call-full{display:none}
  .call .call-short{display:inline}
  .call{padding:13px 14px}
  .call-text{margin-left:4px}
}
@media(max-width:560px){
  .call{padding:11px 11px;font-size:14px}
  .call-text{margin-left:4px}
  .mark{font-size:15px}
}