/* ===== Top navigation =====
   Full state (on the hero): logo + wordmark left, links + CTA right.
   Collapsed state (after leaving the hero, `.is-collapsed`): links fold into one
   hamburger, the "Talk to us" button stays. The hamburger opens a full-screen menu. */
.site-nav {
  position: fixed; inset: 0 0 auto 0; z-index: 1000;
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px var(--margin);
  color: var(--plaster);
  pointer-events: none; /* only the actual controls catch clicks */
}
.site-nav a, .site-nav button { pointer-events: auto; }

.nav-brand { display: flex; align-items: center; gap: 12px; color: inherit; text-decoration: none; }
.nav-mark { width: 26px; height: 26px; display: block; }
.nav-wordmark {
  font: 600 13px/1 var(--display); letter-spacing: .06em; text-transform: uppercase;
  white-space: nowrap;
}

.nav-right { display: flex; align-items: center; gap: 28px; }
.nav-links { display: flex; gap: 28px; list-style: none; margin: 0; padding: 0; max-width: 480px; overflow: hidden; transition: max-width .6s cubic-bezier(.65,0,.35,1) .1s; }
.nav-links a {
  display: block; color: inherit; text-decoration: none;
  font: 400 14px/1.2 var(--sans); letter-spacing: .02em;
  overflow: hidden; /* mask: the inner span slides in/out like the text reveals */
}
.nav-links a > span { display: block; }
.nav-links a { transition: color .3s ease; }
.nav-links a:hover { color: var(--clay); }


/* hamburger: zero width while expanded, grows in when collapsed */
.nav-burger {
  position: relative; width: 0; height: 38px; padding: 0; margin-left: -28px;
  background: none; border: 0; color: inherit; cursor: pointer; overflow: hidden;
  transition: width .5s cubic-bezier(.65,0,.35,1), margin .5s cubic-bezier(.65,0,.35,1);
}
.nav-burger span {
  position: absolute; left: 50%; width: 24px; height: 1.5px; margin-left: -12px; background: currentColor;
  transform: scaleX(0); transition: transform .4s cubic-bezier(.65,0,.35,1) .1s;
}
.nav-burger span:nth-child(1) { top: 14px; }
.nav-burger span:nth-child(2) { top: 22px; }

.site-nav.is-collapsed .nav-links { max-width: 0; pointer-events: none; }
.site-nav.is-collapsed .nav-burger { width: 38px; margin-left: 0; }
.site-nav.is-collapsed .nav-burger span { transform: scaleX(1); }

/* phones: always the collapsed layout */
@media (max-width: 799px) {
  .nav-links { display: none; }
  .nav-burger { width: 38px; margin-left: 0; }
  .nav-burger span { transform: scaleX(1); }
  .nav-right { gap: 16px; }
}

/* ---------- full-screen menu ----------
   Same dark backdrop; items are compact numbered rows separated by hairlines that draw in,
   labels rise through a mask, an arrow slides in on hover. Studio info sits beside them. */
.nav-menu {
  position: fixed; inset: 0; z-index: 999;
  background: var(--ink);
  display: flex; align-items: center;
  padding: 110px var(--margin) 40px;
  opacity: 0; visibility: hidden;
  transition: opacity .5s cubic-bezier(.65,0,.35,1), visibility 0s linear .5s;
}
.nm-inner {
  width: 100%; max-width: 1600px; margin: 0 auto;
  display: grid; gap: 48px;
}
.nm-list { list-style: none; margin: 0; padding: 0; counter-reset: nm; }
.nm-list li { position: relative; }
.nm-list li::before, .nm-list li:last-child::after {
  content: ""; position: absolute; left: 0; right: 0; height: 1px; background: rgba(239,235,225,.16);
  transform: scaleX(0); transform-origin: 0 50%;
  transition: transform .9s cubic-bezier(.65,0,.35,1);
}
.nm-list li::before { top: 0; }
.nm-list li:last-child::after { bottom: 0; }
.nm-list a {
  display: grid; grid-template-columns: 44px 1fr 24px; align-items: center; gap: 12px;
  padding: 16px 0;
  color: var(--plaster); text-decoration: none;
}
.nm-idx { font: 400 12px/1 var(--sans); letter-spacing: .04em; color: var(--muted); opacity: 0; transition: opacity .6s ease, color .3s ease; }
.nm-label { display: block; overflow: hidden; }
.nm-label > span {
  display: block;
  font: 600 clamp(22px, 2.4vw, 32px)/1.1 var(--display); text-transform: uppercase; letter-spacing: .01em;
  transform: translateY(105%);
  transition: transform .8s cubic-bezier(.17,.84,.44,1), color .3s ease;
}
.nm-arrow { display: grid; place-items: center; width: 24px; height: 24px; color: var(--clay); overflow: hidden; }
.nm-arrow svg { width: 18px; height: 18px; transform: translate(-120%, 120%); transition: transform .5s cubic-bezier(.65,0,.35,1); }
@media (hover: hover) {
  .nm-list a:hover .nm-label > span { color: var(--clay); transform: translateX(10px); }
  .nm-list a:hover .nm-idx { color: var(--plaster); }
  .nm-list a:hover .nm-arrow svg { transform: none; }
}

.nm-side { display: flex; flex-wrap: wrap; gap: 24px 48px; opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .8s cubic-bezier(.17,.84,.44,1); }
.nm-info { display: grid; gap: 8px; align-content: start; font: 400 15px/1.3 var(--sans); letter-spacing: .02em; }
.nm-info small { font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.nm-info a { color: var(--plaster); text-decoration: underline; text-decoration-color: var(--clay); text-underline-offset: 4px; }
.nm-info a:hover { color: var(--clay); }

@media (min-width: 800px) {
  .nm-inner { grid-template-columns: 4fr 7fr; column-gap: 8vw; }
  .nm-list { grid-column: 2; grid-row: 1; }
  .nm-side { grid-column: 1; grid-row: 1; align-self: end; flex-direction: column; }
  .nm-list a { grid-template-columns: 64px 1fr 28px; padding: 20px 0; }
}

.nav-open .nav-menu { opacity: 1; visibility: visible; transition: opacity .5s cubic-bezier(.65,0,.35,1); }
.nav-open .nm-list li::before, .nav-open .nm-list li:last-child::after { transform: scaleX(1); }
.nav-open .nm-label > span { transform: none; }
.nav-open .nm-idx { opacity: 1; }
.nav-open .nm-side { opacity: 1; transform: none; transition-delay: .35s; }
.nav-open .nm-list li:nth-child(2)::before, .nav-open .nm-list li:nth-child(2) .nm-label > span, .nav-open .nm-list li:nth-child(2) .nm-idx { transition-delay: .05s; }
.nav-open .nm-list li:nth-child(3)::before, .nav-open .nm-list li:nth-child(3) .nm-label > span, .nav-open .nm-list li:nth-child(3) .nm-idx { transition-delay: .1s; }
.nav-open .nm-list li:nth-child(4)::before, .nav-open .nm-list li:nth-child(4) .nm-label > span, .nav-open .nm-list li:nth-child(4) .nm-idx { transition-delay: .15s; }
.nav-open .nm-list li:nth-child(5)::before, .nav-open .nm-list li:nth-child(5) .nm-label > span, .nav-open .nm-list li:nth-child(5) .nm-idx { transition-delay: .2s; }
.nav-open .nm-list li:nth-child(6)::before, .nav-open .nm-list li:nth-child(6) .nm-label > span, .nav-open .nm-list li:nth-child(6) .nm-idx,
.nav-open .nm-list li:last-child::after { transition-delay: .25s; }
/* hover shift must not wait for the entrance delay */
@media (hover: hover) { .nav-open .nm-list a:hover .nm-label > span { transition-delay: 0s; } }

/* burger -> cross while the menu is open */
.nav-open .nav-burger span:nth-child(1) { transform: translateY(4px) rotate(45deg); }
.nav-open .nav-burger span:nth-child(2) { transform: translateY(-4px) rotate(-45deg); }
.nav-open .nav-burger { width: 38px; margin-left: 0; }
.nav-open .nav-links { max-width: 0; }

/* "Talk to us" only joins the hamburger once the nav collapses (from screen 2 on) */
.nav-cta {
  --sl-h: 38px; --sl-icon: 38px; /* same height as the sound toggle */
  max-width: 0; margin-left: -28px;
  pointer-events: none;
  clip-path: inset(100% 0 0 0); /* masked: nav.js wipes it in from below / out upward */
  transition: max-width .6s cubic-bezier(.65,0,.35,1), margin .6s cubic-bezier(.65,0,.35,1);
}
.site-nav.is-collapsed .nav-cta { max-width: 240px; margin-left: 0; pointer-events: auto; }
@media (max-width: 799px) {
  .site-nav:not(.cta-off) .nav-cta { max-width: 240px; margin-left: 0; pointer-events: auto; clip-path: none !important; }
}
/* hidden while the "Start a project" form is on screen (nav.js) */
.site-nav.cta-off .nav-cta { max-width: 0; margin-left: -28px; pointer-events: none; }
@media (max-width: 799px) { .site-nav.cta-off .nav-cta { margin-left: -16px; } }

/* ---------- progressive blur under the nav ----------
   Stacked backdrop-filter layers, each masked to its own band; blur grows toward the top. */
.nav-blur {
  position: fixed; inset: 0 0 auto 0; height: 110px; z-index: 998;
  pointer-events: none;
}
/* one masked backdrop layer (each extra layer is another full re-sample per frame) … */
.nav-blur::before {
  content: ""; position: absolute; inset: 0;
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  -webkit-mask-image: linear-gradient(to bottom, #000 35%, transparent 100%);
  mask-image: linear-gradient(to bottom, #000 35%, transparent 100%);
}
/* … plus a soft charcoal tint that carries the fade */
.nav-blur::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(to bottom, rgba(25,24,20,.55) 0%, rgba(25,24,20,0) 100%);
}

/* ---------- sound toggle: square with a line that waves while music plays ---------- */
.nav-sound {
  flex-shrink: 0;
  width: 38px; height: 38px; padding: 0;
  display: grid; place-items: center;
  background: none; color: inherit; cursor: pointer;
  border: 1px solid rgba(239,235,225,.35);
  transition: border-color .3s ease, color .3s ease;
}
.nav-sound:hover { border-color: var(--clay); color: var(--clay); }
.nav-sound svg { width: 24px; height: 24px; display: block; overflow: visible; }
.nav-sound path { fill: none; stroke: currentColor; stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round; }

/* small phones: logo mark + hamburger + CTA + sound must fit one row */
@media (max-width: 479px) {
  .site-nav { padding-left: 16px !important; padding-right: 16px !important; }
  .nav-wordmark { display: none; }
  .nav-right { gap: 10px; }
  .site-nav.cta-off .nav-cta { margin-left: -10px; }
  .nav-cta { --sl-h: 36px; --sl-icon: 36px; }
  .nav-cta .sl-btn__label { padding: 0 14px; }
  .nav-sound, .nav-burger { width: 36px !important; height: 36px; }
  .nav-burger span:nth-child(1) { top: 13px; }
  .nav-burger span:nth-child(2) { top: 21px; }
}