/* ============================================================
   WISTERIA · NAV
   Fixed editorial header. Transparent over the hero, translucent
   bone once stuck, retracts on scroll-down. Mobile = bone sheet.
   ============================================================ */

.nav {
  --nav-h: clamp(62px, 5.6vw, 78px);
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: 100;
  /* NB: no transform / will-change / filter on .nav itself — any of
     them would become the containing block for the fixed mobile
     sheet inside it. The retract animation lives on .nav__bar. */
}

/* ---- The bar ------------------------------------------------ */
.nav__bar {
  position: relative;
  z-index: 2;
  background: color-mix(in srgb, var(--w-bone) 0%, transparent);
  border-bottom: 1px solid transparent;
  transform: translate3d(0, 0, 0);
  will-change: transform;
  /* backdrop-filter deliberately not transitioned — it snaps on at
     24px of scroll, which is imperceptible, and interpolating it
     costs a repaint of the whole bar every frame. */
  transition:
    transform 520ms var(--ease),
    background-color 380ms var(--ease-soft),
    border-color 380ms var(--ease-soft);
}
.nav.is-hidden .nav__bar { transform: translate3d(0, -102%, 0); }
.nav.is-stuck .nav__bar {
  background: color-mix(in srgb, var(--w-bone) 78%, transparent);
  border-bottom-color: var(--border);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  backdrop-filter: blur(20px) saturate(1.4);
}
@supports not (backdrop-filter: blur(4px)) {
  .nav.is-stuck .nav__bar { background: color-mix(in srgb, var(--w-bone) 96%, transparent); }
}

.nav__inner {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
  min-height: var(--nav-h);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
}

/* ---- Wordmark ----------------------------------------------- */
.nav__mark {
  justify-self: start;
  display: inline-flex;
  align-items: baseline;
  gap: .16em;
  font-family: var(--font-display);
  font-size: clamp(1.28rem, 1.7vw, 1.5rem);
  font-weight: 500;
  letter-spacing: -0.028em;
  line-height: 1;
  color: var(--text);
  font-variation-settings: "SOFT" 22, "WONK" 0, "opsz" 40;
  padding-block: .35em;
}
.nav__bloom {
  width: 11px;
  height: 11px;
  flex: none;
  transform-origin: 50% 62%;
  transition: transform 620ms var(--ease-spring);
}
.nav__bloom-a { fill: var(--w-wisteria); }
.nav__bloom-b { fill: var(--w-wisteria-lt); }
.nav__bloom-c { fill: var(--w-terra); }
.nav__mark:hover .nav__bloom { transform: rotate(-14deg) scale(1.18); }

/* ---- Desktop links ------------------------------------------ */
.nav__nav { justify-self: center; }
.nav__list {
  display: flex;
  align-items: center;
  gap: clamp(.5rem, 1.9vw, 1.7rem);
  margin: 0;
}
.nav__link {
  position: relative;
  display: inline-block;
  font-size: var(--t-sm);
  font-weight: 450;
  letter-spacing: -0.008em;
  color: var(--text-2);
  padding: .45em .18em;
  transition: color var(--dur-fast) var(--ease-soft);
}
.nav__link::after {
  content: "";
  position: absolute;
  left: .18em; right: .18em; bottom: .28em;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: 100% 50%;
  transition: transform 460ms var(--ease);
}
.nav__link:hover { color: var(--text); }
.nav__link:hover::after { transform: scaleX(1); transform-origin: 0 50%; }

/* ---- Right side --------------------------------------------- */
.nav__end {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: .75rem;
}

/* ---- Hamburger ---------------------------------------------- */
.nav__burger {
  display: none;
  place-items: center;
  width: 44px;
  height: 44px;
  margin-right: -10px;
  color: var(--text);
  border-radius: var(--r-pill);
}
.nav__burger-box {
  position: relative;
  display: block;
  width: 22px;
  height: 16px;
}
.nav__burger-box i {
  position: absolute;
  left: 0;
  top: calc(50% - .75px);
  width: 100%;
  height: 1.5px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 480ms var(--ease);
}
.nav__burger-box i:nth-child(1) { transform: translateY(-4px); }
.nav__burger-box i:nth-child(2) { transform: translateY(4px) scaleX(.68); transform-origin: 0 50%; }
.nav__burger[aria-expanded="true"] .nav__burger-box i:nth-child(1) { transform: rotate(45deg); }
.nav__burger[aria-expanded="true"] .nav__burger-box i:nth-child(2) { transform: rotate(-45deg) scaleX(1); transform-origin: 50% 50%; }

/* ---- Mobile sheet ------------------------------------------- */
.nav__panel {
  position: fixed;
  inset: 0;
  z-index: 1;
  background: var(--w-bone);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition:
    opacity 380ms var(--ease-soft),
    visibility 0s linear 400ms;
}
.nav__panel.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transition:
    opacity 300ms var(--ease-soft),
    visibility 0s linear 0s;
}

.nav__panel-bloom {
  position: absolute;
  inset: auto -30% -22% -30%;
  height: 68%;
  background: var(--grad-bloom);
  filter: blur(46px);
  opacity: .30;
  mix-blend-mode: multiply;
  pointer-events: none;
}

.nav__panel-sheet {
  position: relative;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 2rem;
  padding: calc(var(--nav-h) + clamp(2rem, 9vh, 4.5rem)) var(--gutter) clamp(2rem, 6vh, 3.25rem);
  overflow-y: auto;
}

.nav__panel-list { display: flex; flex-direction: column; }
.nav__panel-list li,
.nav__panel-foot {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 560ms var(--ease) calc(var(--i) * 52ms),
    transform 720ms var(--ease) calc(var(--i) * 52ms);
}
.nav__panel.is-open .nav__panel-list li,
.nav__panel.is-open .nav__panel-foot {
  opacity: 1;
  transform: none;
  transition-delay: calc(120ms + var(--i) * 58ms);
}

.nav__panel-list a {
  display: flex;
  align-items: baseline;
  gap: .8em;
  padding-block: clamp(.32em, 1.4vh, .5em);
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 12vw, 3.1rem);
  font-weight: 400;
  letter-spacing: -0.032em;
  line-height: 1.1;
  font-variation-settings: "SOFT" 30, "WONK" 1, "opsz" 90;
  color: var(--text);
}
.nav__panel-idx {
  font-family: var(--font-body);
  font-size: var(--t-label);
  font-weight: 500;
  letter-spacing: var(--tracking-label);
  color: var(--text-3);
  flex: none;
  transform: translateY(-.55em);
}
.nav__panel-word {
  transition: color var(--dur-fast) var(--ease-soft);
}
.nav__panel-list a:active .nav__panel-word { color: var(--w-plum); }
.nav__panel-list li + li { border-top: 1px solid var(--border); }

.nav__panel-foot { display: flex; flex-direction: column; align-items: flex-start; gap: 1.1rem; }
.nav__panel-cta { align-self: stretch; }
.nav__panel-note {
  font-size: var(--t-xs);
  color: var(--text-3);
  letter-spacing: .002em;
}

/* ---- Breakpoints -------------------------------------------- */
@media (max-width: 860px) {
  .nav__nav,
  .nav__cta { display: none; }
  .nav__burger { display: grid; }
  .nav__inner { grid-template-columns: 1fr auto; }
}

@media (min-width: 861px) {
  .nav__panel { display: none; }
}

/* Very tight phones — keep the mark from crowding the burger */
@media (max-width: 380px) {
  .nav__mark { font-size: 1.2rem; }
}