/* ===========================================================
   NAVIGATION — floating, transparent, minimal chrome.
   Gains a backdrop only after scroll.
=========================================================== */

.nav{
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px var(--pad);
  transition: background-color .5s var(--ease-out),
              backdrop-filter .5s var(--ease-out),
              border-color .5s var(--ease-out),
              padding .5s var(--ease-out);
  border-bottom: 1px solid transparent;
  mix-blend-mode: normal;
}
.nav.scrolled{
  padding-block: 14px;
  background: rgba(240,238,233,.72);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom-color: var(--line);
}

/* Over the dark FANG environment the nav inverts. */
.nav.on-dark{ color: var(--fang-ink); }
.nav.on-dark.scrolled{
  background: rgba(10,9,8,.72);
  border-bottom-color: var(--fang-line);
}
.nav.on-dark .nav__cta{ border-color: var(--fang-ink); }
.nav.on-dark .nav__cta:hover{ background: var(--fang-ink); color: var(--fang-bg); }
.nav.on-dark .nav__burger span{ background: var(--fang-ink); }

.nav__mark{
  font-family: var(--display);
  font-variation-settings: 'wdth' 112, 'wght' 700;
  font-size: .95rem;
  letter-spacing: -.01em;
  line-height: 1;
}
.nav__mark span{
  display: block;
  font-family: var(--body);
  font-size: var(--t-meta);
  text-transform: uppercase;
  letter-spacing: .13em;
  font-weight: 500;
  opacity: .55;
  margin-top: 4px;
}

.nav__links{
  display: flex;
  align-items: center;
  gap: clamp(18px, 2.4vw, 38px);
  font-size: var(--t-sm);
}
.nav__links a{ opacity: .78; transition: opacity .3s var(--ease); }
.nav__links a:hover, .nav__links a[aria-current="true"]{ opacity: 1; }

.nav__cta{
  border: 1px solid var(--ink);
  border-radius: 100px;
  padding: 9px 18px;
  font-size: var(--t-sm);
  font-weight: 600;
  opacity: 1 !important;
  transition: background-color .4s var(--ease-out), color .4s var(--ease-out);
}
.nav__cta:hover{ background: var(--ink); color: var(--paper); }

/* --- mobile --- */
.nav__burger{
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 34px; height: 34px;
}
.nav__burger span{
  display: block; height: 1.5px; width: 22px;
  background: var(--ink);
  transition: transform .4s var(--ease-out), opacity .3s;
}
.menu-open .nav__burger span:nth-child(1){ transform: translateY(6.5px) rotate(45deg); }
.menu-open .nav__burger span:nth-child(2){ opacity: 0; }
.menu-open .nav__burger span:nth-child(3){ transform: translateY(-6.5px) rotate(-45deg); }

.menu{
  position: fixed;
  inset: 0;
  z-index: 90;
  background: var(--paper);
  padding: 120px var(--pad) 48px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  clip-path: inset(0 0 100% 0);
  transition: clip-path .7s var(--ease-out);
  pointer-events: none;
}
.menu-open .menu{ clip-path: inset(0 0 0 0); pointer-events: auto; }

.menu__nav a{
  display: block;
  font-family: var(--display);
  font-variation-settings: 'wdth' 112, 'wght' 620;
  font-size: clamp(2.2rem, 11vw, 3.6rem);
  line-height: 1.06;
  letter-spacing: -.03em;
  padding: 8px 0;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .5s var(--ease-out), transform .5s var(--ease-out);
}
.menu-open .menu__nav a{ opacity: 1; transform: none; }
.menu-open .menu__nav a:nth-child(1){ transition-delay: .12s; }
.menu-open .menu__nav a:nth-child(2){ transition-delay: .18s; }
.menu-open .menu__nav a:nth-child(3){ transition-delay: .24s; }
.menu-open .menu__nav a:nth-child(4){ transition-delay: .30s; }
.menu-open .menu__nav a:nth-child(5){ transition-delay: .36s; }

.menu__foot{
  display: flex; justify-content: space-between; align-items: flex-end;
  gap: 20px; flex-wrap: wrap;
  border-top: 1px solid var(--line);
  padding-top: 20px;
}

@media (max-width: 860px){
  .nav__links{ display: none; }
  .nav__burger{ display: flex; }
}
@media (min-width: 861px){
  .menu{ display: none; }
}