:root {
  --nav-bar-h: 94px;

  --nav-zone: 350px;

  --nav-band-h: 7rem;
}

#site-nav {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 20;
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-bar-h);
  margin: 0 var(--sp-40);
  border-bottom: 1px solid var(--glass-border);
  transition: border-color 300ms ease;
}

#site-nav.is-scrolled .nav-bar {
  border-bottom-color: color-mix(in srgb, var(--ink) 14%, transparent);
}

.nav-logo {
  display: grid;
  align-items: center;
  justify-content: start;
  flex: 0 0 var(--nav-zone);
}

.nav-actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--sp-12);
  flex: 0 0 var(--nav-zone);
}

@media (max-width: 1360px) {
  .nav-bar { margin: 0 var(--sp-24); }
  .nav-logo,
  .nav-actions { flex: 0 0 auto; }
}

.nav-logo__img {
  grid-area: 1 / 1;
  display: block;
  height: 48px;
  width: auto;
  transition: opacity 300ms ease;
}

.nav-logo__img--dark { opacity: 0; }
#site-nav.is-scrolled .nav-logo__img--light { opacity: 0; }
#site-nav.is-scrolled .nav-logo__img--dark { opacity: 1; }

@media (max-width: 1199px) { .nav-logo__img { height: 44px; } }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--sp-40);
  min-width: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  font: 400 18px/16px var(--font-ui-caps);
  letter-spacing: var(--type-label-sm-tracking);
  text-transform: uppercase;
  white-space: nowrap;
  color: var(--white);
  transition: color 300ms ease;
}

#site-nav.is-scrolled .nav-links { color: var(--ink); }

.nav-links a {
  display: inline-block;
  padding: var(--sp-8) 0;
  text-decoration: none;
  transition: color var(--transition-fast) ease;
}

.nav-links a:hover { color: var(--ink); }
#site-nav.is-scrolled .nav-links a:hover { color: var(--white); }
#site-nav.is-over-dark.is-scrolled .nav-links a:hover { color: var(--ink); }

#site-nav.is-scrolled .nav-actions .btn--ghost {
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent) 45%, transparent);
}

#site-nav .nav-bar a:focus-visible { outline-color: var(--white); }
#site-nav.is-scrolled .nav-bar a:focus-visible { outline-color: var(--accent-ink); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: var(--btn-h-lg);
  max-width: 100%;
  padding: 0 27px 2px;
  border: 0;
  border-radius: var(--radius-btn);
  font: 500 18px/16px var(--font-ui);
  letter-spacing: var(--type-label-sm-tracking);
  white-space: nowrap;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition:
    background-color var(--transition-fast) ease,
    color var(--transition-fast) ease,
    box-shadow var(--transition-fast) ease,
    transform var(--transition-fast) ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn--md {
  height: var(--btn-h-md);
  padding-inline: var(--sp-24);
  font-size: 14px;
  line-height: 20px;
}

.btn--primary {
  background: var(--accent);
  color: var(--white);
}

.btn--ghost {
  background: var(--white);
  color: var(--accent);
}

.btn--glow {
  box-shadow: var(--shadow-accent);
}

@media (hover: hover) {
  .btn--primary:hover { background: var(--accent-hover); }
  .btn--ghost:hover {
    background: color-mix(in srgb, var(--white) 92%, var(--accent));
    color: var(--accent-hover);
  }
}

.btn--primary:active { background: var(--accent-active); }
.btn--ghost:active {
  background: color-mix(in srgb, var(--white) 82%, var(--accent));
  color: var(--accent-active);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
}

.nav-toggle__bar {
  width: 22px;
  height: 2px;
  background: var(--white);
  transition:
    transform var(--transition-fast) ease,
    opacity var(--transition-fast) ease,
    background-color 300ms ease;
}

#site-nav.is-scrolled .nav-toggle__bar { background: var(--ink); }

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-of-type(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-of-type(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-of-type(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-toggle:focus-visible { outline: 2px solid var(--white); outline-offset: 2px; }
#site-nav.is-scrolled .nav-toggle:focus-visible { outline-color: var(--accent-ink); }

@media (max-width: 1199px) {
  .nav-links { gap: 20px; font-size: 16px; }
  .nav-actions .btn { padding-inline: var(--sp-16); }
}

@media (max-width: 1024px) {
  .nav-bar { justify-content: flex-start; gap: var(--sp-16); }
  .nav-bar nav,
  .nav-actions .btn--ghost { display: none; }
  .nav-actions { margin-left: auto; }
  .nav-toggle { display: inline-flex; }
}

@media (max-width: 768px) {
  .nav-actions { display: none; }
  .nav-toggle { margin-left: auto; }
}

.nav-sheet {
  display: flex;
  flex-direction: column;
  gap: var(--sp-32);
}

#nav-sheet[hidden] { display: none; }

.nav-sheet__links {
  display: flex;
  flex-direction: column;
  gap: var(--sp-8);
  flex-shrink: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-sheet__links a {
  display: flex;
  align-items: center;
  min-height: 44px;
  color: var(--white);
  font: 400 18px/24px var(--font-ui);
  letter-spacing: var(--type-label-sm-tracking);
  text-transform: uppercase;
  text-decoration: none;
}

#nav-sheet .btn {
  width: 100%;
  flex-shrink: 0;
}

@media (max-width: 768px) {
  .btn {
    padding-inline: var(--sp-24);
    line-height: 20px;
  }
}


.nav-blur {
  position: absolute;
  top: 0; right: 0; left: 0;
  height: var(--nav-band-h);
  visibility: hidden;
  pointer-events: none;
  z-index: -1;
}

#site-nav.is-scrolled .nav-blur { visibility: visible; }

.nav-blur__layer {
  position: absolute;
  inset: 0;
  -webkit-backdrop-filter: blur(0px);
  backdrop-filter: blur(0px);
  transition: -webkit-backdrop-filter 300ms ease, backdrop-filter 300ms ease;
}

.nav-blur__layer--1 {
  -webkit-mask-image: linear-gradient(to top, transparent 0%, black 33.3%, black 66.7%, transparent 100%);
  mask-image: linear-gradient(to top, transparent 0%, black 33.3%, black 66.7%, transparent 100%);
}
.nav-blur__layer--2 {
  -webkit-mask-image: linear-gradient(to top, transparent 33.3%, black 66.7%, black 100%);
  mask-image: linear-gradient(to top, transparent 33.3%, black 66.7%, black 100%);
}
.nav-blur__layer--3 {
  -webkit-mask-image: linear-gradient(to top, transparent 66.7%, black 100%);
  mask-image: linear-gradient(to top, transparent 66.7%, black 100%);
}

#site-nav.is-scrolled .nav-blur__layer--1 { -webkit-backdrop-filter: blur(0.321rem); backdrop-filter: blur(0.321rem); }
#site-nav.is-scrolled .nav-blur__layer--2 { -webkit-backdrop-filter: blur(1.218rem); backdrop-filter: blur(1.218rem); }
#site-nav.is-scrolled .nav-blur__layer--3 { -webkit-backdrop-filter: blur(2.5rem); backdrop-filter: blur(2.5rem); }

#site-nav::after {
  content: "";
  position: absolute;
  top: 0; right: 0; left: 0;
  height: var(--nav-band-h);
  background: transparent;
  -webkit-mask-image: linear-gradient(to bottom, black calc(var(--nav-bar-h) * 0.78), transparent var(--nav-band-h));
  mask-image: linear-gradient(to bottom, black calc(var(--nav-bar-h) * 0.78), transparent var(--nav-band-h));
  pointer-events: none;
  z-index: -1;
  transition: background 300ms ease;
}
#site-nav.is-scrolled::after { background: var(--nav-glass); }

#site-nav.is-scrolled .nav-toggle { color: var(--ink); }

#site-nav.is-over-dark.is-scrolled::after {
  background: color-mix(in srgb, var(--ink) 46%, transparent);
}

#site-nav.is-over-dark.is-scrolled .nav-links { color: var(--white); }
#site-nav.is-over-dark.is-scrolled .nav-logo__img--light { opacity: 1; }
#site-nav.is-over-dark.is-scrolled .nav-logo__img--dark { opacity: 0; }
#site-nav.is-over-dark.is-scrolled .nav-toggle__bar { background: var(--white); }

#site-nav::before {
  content: "";
  position: absolute;
  top: 0; right: 0; left: 0;
  height: 184px;
  background: linear-gradient(to bottom, var(--nav-sky) 2.885%, var(--nav-sky-fade));
  pointer-events: none;
  z-index: -1;
  transition: opacity 300ms ease;
}
#site-nav.is-scrolled::before { opacity: 0; }

@media (scripting: none) {
  #site-nav { position: absolute; }

  .nav-toggle { display: none; }

  .nav-bar nav { display: block; }

  @media (max-width: 768px) {
    #site-nav { position: relative; }
    .nav-bar {
      height: auto;
      min-height: var(--nav-bar-h);
      flex-wrap: wrap;
      row-gap: var(--sp-8);
      padding-block: var(--sp-12);
    }
    .nav-links {
      display: flex;
      flex-wrap: wrap;
      gap: var(--sp-8) var(--sp-16);
      width: 100%;
    }
    .nav-links a { min-height: 44px; display: flex; align-items: center; font-size: 14px; color: var(--ink); }
  }
}