.site-header-ui {
  --dv-accent: #0ea5e9;
  --dv-white: #ffffff;
  --dv-muted: rgba(255, 255, 255, 0.6);
  --dv-border: rgba(255, 255, 255, 0.1);
  --dv-nav-h: 72px;
  --dv-pad: clamp(1rem, 5vw, 3rem);
  --dv-ease: cubic-bezier(0.16, 1, 0.3, 1);
  --dv-font-display: "Orbitron", sans-serif;
  --dv-font-body: "Roboto", sans-serif;
}

:where(.site-header-ui) *,
:where(.site-header-ui) *::before,
:where(.site-header-ui) *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:where(.site-header-ui) a {
  color: inherit;
  text-decoration: none;
}

:where(.site-header-ui) ul {
  list-style: none;
}

:where(.site-header-ui) button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

.site-header-ui :focus-visible {
  outline: 2px solid var(--dv-accent);
  outline-offset: 3px;
  border-radius: 6px;
}

/* Bar */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--dv-nav-h);
  display: flex;
  align-items: center;
  font-family: var(--dv-font-body);
  color: var(--dv-white);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.site-nav--scrolled {
  background: rgba(2, 6, 23, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 1px 0 var(--dv-border), 0 8px 32px rgba(0, 0, 0, 0.4);
}

.site-nav--search-open,
.site-nav--menu-open {
  background: rgba(2, 6, 23, 0.97);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  box-shadow: none;
}

.site-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  width: 100%;
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: var(--dv-pad);
}

/* Logo */
.site-nav__logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
  font-family: var(--dv-font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.05em;
}

.site-nav__logo-mark {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  background: var(--dv-accent);
  border-radius: 6px;
}

.site-nav__logo-mark svg {
  width: 18px;
  height: 18px;
}

/* Desktop links */
.site-nav__links {
  display: none;
  align-items: center;
  gap: 0.5rem;
}

.site-nav__link {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0.5rem 1rem;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--dv-muted);
  transition: color 0.15s ease, background 0.15s ease;
}

.site-nav__link:hover,
.site-nav__link.is-active {
  color: var(--dv-white);
  background: rgba(255, 255, 255, 0.06);
}

.site-nav__link.is-active::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--dv-accent);
}

/* Actions */
.site-nav__actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.site-nav__search-toggle {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-size: 1rem;
  color: var(--dv-white);
  transition: background 0.15s ease, color 0.15s ease;
}

.site-nav__search-toggle:hover,
.site-nav__search-toggle[aria-expanded="true"] {
  background: rgba(255, 255, 255, 0.08);
  color: var(--dv-accent);
}

/* Burger */
.site-nav__burger {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  min-width: 44px;
  min-height: 44px;
  border-radius: 6px;
  transition: background 0.15s ease;
}

.site-nav__burger:hover {
  background: rgba(255, 255, 255, 0.07);
}

.site-nav__burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--dv-white);
  border-radius: 2px;
  transition: transform 0.3s var(--dv-ease), opacity 0.15s ease;
}

.site-nav__burger.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-nav__burger.is-open span:nth-child(2) {
  opacity: 0;
}

.site-nav__burger.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Search dropdown */
.site-nav__search {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: rgba(2, 6, 23, 0.97);
  border-bottom: 1px solid var(--dv-border);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity 0.25s ease, transform 0.25s var(--dv-ease), visibility 0s linear 0.25s;
}

.site-nav__search.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition: opacity 0.25s ease, transform 0.25s var(--dv-ease), visibility 0s;
}

.site-nav__search-inner {
  max-width: 1280px;
  margin-inline: auto;
  padding: 1rem var(--dv-pad);
}

.site-nav__search-form {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 4px 4px 4px 1.25rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--dv-border);
  border-radius: 9999px;
  transition: border-color 0.15s ease;
}

.site-nav__search-form:focus-within {
  border-color: var(--dv-accent);
}

.site-nav__search-input {
  flex: 1;
  min-width: 0;
  min-height: 44px;
  background: transparent;
  border: 0;
  color: var(--dv-white);
  color-scheme: dark;
  font-family: var(--dv-font-body);
  font-size: 1rem;
}

.site-nav__search-input:focus,
.site-nav__search-input:focus-visible {
  outline: none;
}

.site-nav__search-input::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

.site-nav__search-submit {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--dv-accent);
  color: #020617;
  transition: transform 0.15s ease;
}

.site-nav__search-submit:hover {
  transform: scale(1.05);
}

.site-nav__sr {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* Mobile menu */
.site-nav__mobile-menu {
  position: fixed;
  top: var(--dv-nav-h);
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 999;
  display: flex;
  flex-direction: column;
  padding: 2rem var(--dv-pad);
  background: rgba(2, 6, 23, 0.98);
  transform: translateX(100%);
  visibility: hidden;
  transition: transform 0.5s var(--dv-ease), visibility 0s linear 0.5s;
}

.site-nav__mobile-menu.is-open {
  transform: translateX(0);
  visibility: visible;
  transition: transform 0.5s var(--dv-ease), visibility 0s;
}

.site-nav__mobile-link {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 1rem 0;
  border-bottom: 1px solid var(--dv-border);
  font-family: var(--dv-font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--dv-muted);
  transition: color 0.15s ease;
}

.site-nav__mobile-link:hover,
.site-nav__mobile-link.is-active {
  color: var(--dv-accent);
}

/* WordPress admin bar offset */
.admin-bar .site-nav {
  top: 32px;
}

.admin-bar .site-nav__mobile-menu {
  top: calc(var(--dv-nav-h) + 32px);
}

@media (max-width: 782px) {
  .admin-bar .site-nav {
    top: 46px;
  }

  .admin-bar .site-nav__mobile-menu {
    top: calc(var(--dv-nav-h) + 46px);
  }
}

@media (min-width: 900px) {
  .site-nav__links {
    display: flex;
  }

  .site-nav__burger {
    display: none;
  }

  .site-nav__mobile-menu {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header-ui *,
  .site-header-ui *::before,
  .site-header-ui *::after {
    transition-duration: 0.01ms !important;
  }
}