/* Shared site navigation. One nav for every page under site/.
   Every value traces to the :root in site.css (warm paper surface, token radii). */
/* the hairline under the nav is its own layer that fades in, so scrolling never repaints the bar */
.nav{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 90%,transparent);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}
.nav:after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;background:var(--line);opacity:0;transition:opacity .3s var(--ease);pointer-events:none}
.nav.scrolled:after,.nav.open:after{opacity:1}

/* once the page moves, the bar lifts into a floating glass capsule; at the top it sits flat on the page.
   Only colour, shadow and a transform change, so nothing below it moves. */
.nav{background:transparent;-webkit-backdrop-filter:none;backdrop-filter:none}
.nav:after{display:none}
.nav-in{position:relative;width:calc(100% - 24px);border-radius:var(--r-pill);border:1px solid transparent;transition:background .45s var(--ease-out),box-shadow .45s var(--ease-out),border-color .45s var(--ease-out),transform .45s var(--ease-out)}
.nav.scrolled .nav-in,.nav.open .nav-in{background:color-mix(in srgb,var(--bg) 88%,transparent);-webkit-backdrop-filter:blur(20px) saturate(1.6);backdrop-filter:blur(20px) saturate(1.6);border-color:rgba(255,255,255,.7);box-shadow:inset 0 1px 0 rgba(255,255,255,.8),var(--sh);transform:translateY(8px)}
@media(prefers-reduced-motion:reduce){.nav-in{transition:none}}
/* above the floating capsule, a short soft blur so text scrolling past never shows a hard cut line */
.nav:before{content:"";position:absolute;left:0;right:0;top:0;height:30px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);-webkit-mask-image:linear-gradient(var(--ink),transparent);mask-image:linear-gradient(var(--ink),transparent);opacity:0;transition:opacity .45s var(--ease-out);pointer-events:none}
.nav.scrolled:before{opacity:1}
@media(max-width:960px){.nav-in{width:calc(100% - 16px)}.nav.open .nav-links{margin-top:8px;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-lg)}}
.nav-in{max-width:1120px;margin:0 auto;padding:0 28px;display:flex;align-items:center;gap:28px;height:70px}
/* the capsule sits 12px in from each side; take that back out of its padding so the brand lines up with the content */
@media(min-width:961px){.nav-in{padding:0 clamp(15px,calc(50% - 545px),27px)}}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.12rem;letter-spacing:-.02em;color:var(--ink)}
.brand:hover{text-decoration:none}
.mark{width:32px;height:32px;border-radius:var(--r-btn);background:linear-gradient(135deg,var(--brand),var(--brand-2));display:inline-flex;align-items:center;justify-content:center;flex:none}
.mark svg{width:20px;height:20px}

/* top level */
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-links>a,.nav-t{display:inline-flex;align-items:center;gap:6px;font:inherit;font-weight:600;font-size:.96rem;line-height:1.3;color:var(--ink-2);padding:8px 12px;border-radius:var(--r-btn);background:none;border:0;cursor:pointer}
.nav-links>a:hover,.nav-t:hover,.nav-group.open>.nav-t{color:var(--ink);background:var(--soft);text-decoration:none}
.nav-t svg{width:14px;height:14px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform .2s var(--ease)}
.nav-group.open>.nav-t svg{transform:rotate(180deg)}

/* dropdown */
.nav-group{position:relative}
.nav-panel{position:absolute;left:0;top:100%;padding-top:8px;display:none;z-index:60}
.nav-group.open>.nav-panel{display:block;animation:menu 180ms var(--ease)}
@keyframes menu{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}
@media(prefers-reduced-motion:reduce){.nav-group.open>.nav-panel{animation:none}}
.nav-menu{min-width:300px;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh);padding:8px}
.nav-menu a{display:block;padding:10px 12px;border-radius:var(--r-btn);color:var(--ink);text-decoration:none}
.nav-menu a:hover{background:var(--soft);text-decoration:none}
.nav-menu b{display:block;font-weight:700;font-size:.94rem;line-height:1.3}
.nav-menu span{display:block;font-size:.84rem;line-height:1.4;color:var(--mut);margin-top:2px}
/* the wide Product menu: four groups, each with a one line promise */
.nav-menu--wide{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;min-width:960px;padding:14px}
.nav-col{padding:6px}
.nav-col h5{font-size:.72rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--brand);margin:0 12px 2px}
.nav-col p{font-size:.84rem;line-height:1.4;color:var(--mut);margin:0 12px 8px}
.nav-group:first-child .nav-panel{left:-120px}
/* the wide menu hangs from the bar, starting at the Product button bottom edge so the pointer never falls through a gap */
@media(min-width:961px){.nav-group:first-child{position:static}.nav-group:first-child .nav-panel{left:0;right:0;top:calc(50% + .624rem + 8px)}.nav-menu--wide{min-width:0}}

/* log in and demo */
.nav-cta{display:flex;align-items:center;gap:8px;margin-left:8px;padding-left:18px;border-left:1px solid var(--line)}
.nav-login{display:inline-flex;align-items:center;font-weight:600;font-size:.96rem;line-height:1.3;color:var(--ink-2);padding:8px 12px;border-radius:var(--r-btn)}
.nav-login:hover{color:var(--ink);background:var(--soft);text-decoration:none}
.nav-links>a,.nav-t,.nav-login{white-space:nowrap}
@media(min-width:961px) and (max-width:1060px){.nav-in{gap:16px}.nav-links>a,.nav-t,.nav-login{padding:8px 9px}.nav-cta{margin-left:4px;padding-left:12px}}

/* mobile */
.nav-burger{display:none;margin-left:auto;width:42px;height:42px;border-radius:var(--r-btn);border:1px solid var(--line);background:none;cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:5px}
.nav-burger i{display:block;width:18px;height:2px;border-radius:var(--r-pill);background:var(--ink);transition:transform .2s var(--ease)}
.nav.open .nav-burger i:first-child{transform:translateY(3.5px) rotate(45deg)}
.nav.open .nav-burger i:last-child{transform:translateY(-3.5px) rotate(-45deg)}
body.nav-lock{overflow:hidden}
body.nav-lock .pf-chat-btn{visibility:hidden}
/* Book a demo stays on screen on phones, beside the menu button; on wider screens the copy inside .nav-cta is the one shown. */
.nav-book{display:none}
@media(max-width:960px){
  .nav-in{height:64px;padding:0 20px;gap:16px}
  .nav-book{display:inline-flex;margin-left:auto;white-space:nowrap}
  .nav-burger{display:flex;margin-left:0;flex:none}
  .nav-cta .btn{display:none}
  .nav-links{display:none;position:absolute;left:0;right:0;top:100%;flex-direction:column;align-items:stretch;gap:0;margin:0;padding:4px 20px 24px;background:var(--bg);border-bottom:1px solid var(--line);max-height:calc(100vh - 64px);overflow:auto}
  .nav.open .nav-links{display:flex}
  .nav-group{position:static}
  .nav-t{display:block;width:100%;text-align:left;padding:18px 0 4px;font-size:.72rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--mut);pointer-events:none;border-radius:0}
  .nav-t svg{display:none}
  .nav-panel{position:static;display:block;padding:0}
  .nav-menu{min-width:0;background:none;border:0;border-radius:0;box-shadow:none;padding:0}
  .nav-menu a{padding:9px 0;border-radius:0}
  .nav-menu span{display:none}
  .nav-menu--wide{display:block;min-width:0;padding:0}
  .nav-col{padding:0}
  .nav-col h5{margin:12px 0 0}
  .nav-col p{display:none}
  .nav-group:first-child .nav-panel{left:auto}
  .nav-links>a{padding:16px 0;margin-top:10px;font-size:1.02rem;border-top:1px solid var(--line);border-radius:0}
  .nav-links>a:hover{background:none}
  .nav-cta{margin:0;padding:16px 0 0;border-left:0;border-top:1px solid var(--line);flex-direction:column;align-items:stretch;gap:10px}
  .nav-cta .btn,.nav-login{justify-content:center}
  .nav-login{padding:12px;border:1px solid var(--line);border-radius:var(--r-btn)}
}
/* the smallest phones: the logo, Book a demo and the menu button all fit on one row */
@media(max-width:400px){.nav-in{gap:12px}}
@media(max-width:374px){.nav-in{padding:0 12px;gap:8px}.nav-book{padding:.6rem .65rem;font-size:.86rem}}