.site-header {
  position: fixed;
  z-index: 40;
  inset: 0 0 auto;
  min-height: 66px;
  padding-inline: var(--scan-rail-x);
  display: grid;
  align-items: center;
  border-bottom: 1px solid rgb(var(--fx-muted-rgb, 244 244 240) / 0.14);
  background: rgb(var(--fx-bg-rgb, 5 6 7) / 0.76);
  backdrop-filter: blur(18px);
}

.site-header__inner {
  width: min(100%, var(--scan-header-width));
  min-height: 66px;
  margin-inline: 0;
  display: grid;
  grid-template-columns: auto minmax(220px, 1fr) auto;
  align-items: center;
  gap: clamp(30px, 4vw, 60px);
}

.site-header a {
  text-decoration: none;
}

.site-header__brand {
  display: inline-grid;
  grid-template-columns: 34px auto;
  align-items: center;
  justify-self: start;
  gap: 10px;
  color: var(--scan-text);
  font: 900 13px/1 var(--scan-font-mono);
  letter-spacing: 0.02em;
  text-transform: lowercase;
}

.site-header__mark {
  position: relative;
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  overflow: hidden;
  border: 1px solid rgb(var(--fx-signal-rgb, 216 255 53) / 0.5);
  background: transparent;
  box-shadow:
    0 0 calc(10px * var(--fx-glow-strength, 1)) rgb(var(--fx-signal-rgb, 216 255 53) / 0.14),
    inset 0 0 0 1px rgb(var(--fx-muted-rgb, 244 244 240) / 0.08);
  color: var(--scan-signal);
  font-size: 11px;
  isolation: isolate;
}

.site-header__mark::before,
.site-header__mark::after {
  content: "";
  position: absolute;
  pointer-events: none;
}

.site-header__mark::before {
  z-index: -2;
  inset: -88%;
  background: conic-gradient(
    from 0deg,
    rgb(var(--fx-signal-rgb, 216 255 53) / 0.48),
    rgb(var(--fx-support-1-rgb, 216 255 53) / 0.08) 28%,
    rgb(var(--fx-support-2-rgb, 216 255 53) / 0.36) 48%,
    rgb(var(--fx-support-3-rgb, 216 255 53) / 0.06) 62%,
    rgb(var(--fx-signal-rgb, 216 255 53) / 0.48)
  );
  animation: ug-mark-chase 8s linear infinite;
}

.site-header__mark::after {
  z-index: -1;
  inset: 2px;
  background:
    linear-gradient(135deg, rgb(var(--fx-signal-rgb, 216 255 53) / 0.09), transparent 58%),
    rgb(var(--fx-bg-rgb, 5 6 7) / 0.82);
}

.site-header__brand:hover .site-header__mark,
.site-header__brand:focus-visible .site-header__mark {
  border-color: rgb(var(--fx-signal-rgb, 216 255 53) / 0.68);
  box-shadow:
    0 0 calc(16px * var(--fx-glow-strength, 1)) rgb(var(--fx-signal-rgb, 216 255 53) / 0.22),
    inset 0 0 0 1px rgb(var(--fx-signal-rgb, 216 255 53) / 0.14);
}

.site-header__brand:hover .site-header__mark::before,
.site-header__brand:focus-visible .site-header__mark::before {
  animation-duration: 5.5s;
}

@keyframes ug-mark-chase {
  to {
    transform: rotate(1turn);
  }
}

.site-header__nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(14px, 3vw, 34px);
  color: var(--scan-muted);
  font: 900 12px/1 var(--scan-font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-header__nav a {
  position: relative;
  padding: 10px 0;
}

.site-header__nav a::after {
  content: "";
  position: absolute;
  inset: auto 0 3px;
  height: 1px;
  background: var(--scan-signal);
  opacity: 0;
  transform: scaleX(0.4);
  transition: opacity 140ms ease, transform 140ms ease;
}

.site-header__nav a:hover,
.site-header__nav a[aria-current="page"] {
  color: var(--scan-text);
}

.site-header__nav a:hover::after,
.site-header__nav a[aria-current="page"]::after {
  opacity: 1;
  transform: scaleX(1);
}

.site-header__login {
  display: inline-grid;
  place-items: center;
  justify-self: end;
  min-height: 34px;
  padding: 0 13px;
  border: 1px solid rgb(var(--fx-muted-rgb, 244 244 240) / 0.24);
  border-radius: 0;
  background: rgb(var(--fx-muted-rgb, 244 244 240) / 0.06);
  color: var(--scan-muted);
  font: 900 11px/1 var(--scan-font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-header__login:hover {
  border-color: rgb(var(--fx-signal-rgb, 216 255 53) / 0.7);
  background: rgb(var(--fx-signal-rgb, 216 255 53) / 0.11);
  color: var(--scan-text);
}

.quick-cluster {
  position: fixed;
  z-index: 45;
  right: max(14px, env(safe-area-inset-right));
  bottom: max(14px, env(safe-area-inset-bottom));
  display: flex;
  align-items: center;
  gap: 4px;
}

.theme-quick-toggle,
.lab-quick-link {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid rgb(var(--fx-muted-rgb, 244 244 240) / 0.2);
  background: rgb(var(--fx-bg-rgb, 5 6 7) / 0.48);
  color: rgb(var(--fx-muted-rgb, 244 244 240) / 0.5);
  backdrop-filter: blur(14px);
  transition: background 140ms ease, border-color 140ms ease, color 140ms ease, transform 140ms ease;
}

.theme-quick-toggle {
  appearance: none;
  padding: 0;
  border-radius: 0;
  font: inherit;
  cursor: pointer;
}

.theme-quick-toggle__icon {
  display: none;
}

html:not([data-scan-tone='light']) .theme-quick-toggle__icon--sun,
html[data-scan-tone='light'] .theme-quick-toggle__icon--moon {
  display: block;
}

.theme-quick-toggle:hover,
.theme-quick-toggle:focus-visible,
.lab-quick-link:hover,
.lab-quick-link:focus-visible {
  border-color: rgb(var(--fx-signal-rgb, 216 255 53) / 0.82);
  background: rgb(var(--fx-signal-rgb, 216 255 53) / 0.12);
  color: var(--scan-signal);
  outline: none;
  transform: translateY(-2px);
}

.theme-quick-toggle svg,
.lab-quick-link svg {
  width: 21px;
  height: 21px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: square;
  stroke-linejoin: miter;
  stroke-width: 1.8;
}

.scan-footer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 18px;
  padding: 28px var(--scan-rail-x) 34px;
  border-top: 1px solid var(--scan-line);
  background:
    repeating-linear-gradient(0deg, rgb(var(--fx-muted-rgb, 244 244 240) / 0.035) 0 1px, transparent 1px 12px),
    linear-gradient(90deg, rgb(var(--fx-signal-rgb, 216 255 53) / 0.06), transparent 28%),
    rgb(var(--fx-bg-rgb, 5 6 7) / 0.92);
  color: var(--scan-muted);
  font: 900 12px/1.4 var(--scan-font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.scan-footer p,
.scan-footer small {
  margin: 0;
}

.scan-footer p {
  color: var(--scan-text);
}

.scan-footer small {
  justify-self: end;
  color: var(--scan-signal);
}

@media (max-width: 760px) {
  .site-header {
    min-height: 94px;
    padding-block: 8px;
  }

  .site-header__inner {
    grid-template-columns: 1fr auto;
    width: 100%;
    min-height: 78px;
    gap: 8px;
  }

  .site-header__brand {
    grid-template-columns: 30px auto;
  }

  .site-header__mark {
    width: 30px;
    height: 30px;
  }

  .site-header__nav {
    grid-column: 1 / -1;
    order: 3;
    justify-content: flex-start;
    gap: 18px;
    overflow: hidden;
    padding-top: 2px;
  }

  .site-header__login {
    justify-self: end;
    min-height: 30px;
    padding-inline: 10px;
  }
}

@media (max-width: 620px) {
  .scan-footer {
    grid-template-columns: 1fr;
  }

  .scan-footer small {
    justify-self: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header__mark::before {
    animation: none;
  }
}