.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: var(--glass-background);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

/* Reserve space for fixed header */
body {
  padding-top: calc(3.25rem + (var(--space-s) * 2));
}

.site-header__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-m);
  padding-block: var(--space-s);
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-s);
  text-decoration: none;
  color: inherit;
  font-weight: 600;
}

.site-brand img {
  width: 3.25rem;
  height: auto;
  display: block;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(var(--space-s), 3vw, var(--space-xl));
}

.site-nav__links {
  display: flex;
  align-items: center;
  gap: clamp(var(--space-s), 1.25vw, var(--space-l));
  list-style: none;
  padding: 0;
  margin: 0;
}

.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
  padding-block: var(--space-2xs);
  font-weight: 500;
  color: var(--color-muted);
  transition: color var(--transition-base);
}

.site-nav__link:hover,
.site-nav__link:focus-visible,
.site-nav__link[aria-current] {
  color: var(--color-text);
}

.site-nav__link[aria-current]::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  bottom: -0.4rem;
  height: 0.2rem;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-strong));
}

.site-nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-s);
}

.site-nav__search-trigger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: auto;
  min-width: 2.5rem;
  height: 2.5rem;
  gap: var(--space-xs);
  padding-inline: var(--space-s);
  border-radius: 999px;
  border: 1px solid transparent;
  background: transparent;
  color: inherit;
  cursor: pointer;
  transition: transform var(--transition-base), border-color var(--transition-base), background-color var(--transition-base);
}

.site-nav__search-trigger:hover,
.site-nav__search-trigger:focus-visible {
  transform: translateY(-1px);
  border-color: var(--glass-border);
  background-color: var(--color-surface);
}

.site-nav__toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border-radius: 999px;
  border: 1px solid transparent;
  background: var(--color-surface);
  color: inherit;
  cursor: pointer;
  transition: background-color var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
}

.site-nav__toggle-icon {
  width: 1.4rem;
  height: 1.4rem;
  display: block;
}

.site-nav__toggle-icon > path:last-child {
  display: none;
}

.site-nav__toggle-line {
  transform-origin: 12px 12px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.site-nav__toggle:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.site-nav__toggle:hover,
.site-nav__toggle[aria-expanded="true"] {
  border-color: var(--glass-border);
  background: var(--color-surface-strong);
}

.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-line--top {
  transform: translateY(6px) rotate(45deg);
}

.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-line--middle {
  opacity: 0;
}

.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-line--bottom {
  transform: translateY(-6px) rotate(-45deg);
}

.search-shortcut {
  font-size: 0.75rem;
  opacity: 0.6;
  border: 1px solid var(--glass-border);
  border-radius: 0.35rem;
  padding: 0.1rem 0.4rem;
  margin-left: var(--space-2xs);
}

.search-overlay {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: none;
  align-items: flex-start;
  justify-content: center;
  width: 100vw;
  height: 100vh;
  padding: 6rem var(--space-l) var(--space-l);
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(12px);
}

.search-overlay.is-visible {
  display: flex;
  pointer-events: all;
}

.search-dialog {
  position: relative;
  width: min(45rem, 100%);
  max-height: min(38rem, 90vh);
  overflow: hidden;
  background: var(--glass-background);
  border-radius: 1.125rem;
  border: 1px solid var(--color-border);
  box-shadow: 0 0 2rem rgba(0, 0, 0, 0.35), 0 1.5rem 3rem rgba(0, 0, 0, 0.35);
  padding: var(--space-l);
  color: var(--color-text);
}

.search-header {
  display: flex;
  align-items: center;
  gap: var(--space-m);
}

.search-dialog__form {
  flex: 1;
}

.search-input-wrapper {
  display: flex;
  align-items: center;
  gap: var(--space-s);
  min-width: 0;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-m);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.search-input-wrapper svg {
  width: 1.1rem;
  height: 1.1rem;
  flex: 0 0 auto;
  color: var(--color-muted);
}

.search-input {
  width: 100%;
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--color-text);
  font-size: 1rem;
}

.search-input::placeholder {
  color: var(--color-muted);
}

.search-dialog__close {
  width: 2.75rem;
  height: 2.75rem;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-s);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  transition: background-color var(--transition-base), border-color var(--transition-base);
}

.search-dialog__close:hover,
.search-dialog__close:focus-visible {
  border-color: var(--color-accent);
  background: var(--color-surface-strong);
  outline: none;
}

.search-meta {
  margin: var(--space-l) 0 var(--space-s);
}

.search-meta h2 {
  margin: 0;
  font-size: var(--font-size-large);
}

.search-description {
  margin-top: var(--space-2xs);
  color: var(--color-muted);
  font-size: 0.95rem;
}

.search-results {
  list-style: none;
  margin: 0;
  padding: 0 var(--space-2xs) 0 0;
  display: grid;
  gap: var(--space-s);
  max-height: 22.5rem;
  overflow-y: auto;
}

.search-result {
  display: grid;
  gap: var(--space-2xs);
  padding: var(--space-m);
  border-radius: var(--radius-m);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  transition: border-color var(--transition-base), background-color var(--transition-base);
}

.search-result:hover,
.search-result:focus-within {
  border-color: var(--color-accent);
  background: var(--color-surface-strong);
}

.search-result__title {
  display: block;
  margin: 0 0 var(--space-2xs);
  font-weight: 600;
  color: var(--color-text);
  font-size: 1.05rem;
}

.search-result__description {
  color: var(--color-muted);
  font-size: 0.95rem;
}

.search-empty {
  margin: var(--space-l) 0 0;
  padding: var(--space-m);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-m);
  background: var(--color-surface);
  color: var(--color-muted);
  text-align: center;
}

@media (max-width: 40rem) {
  .search-overlay {
    padding: 5rem var(--space-s) var(--space-s);
  }

  .search-dialog {
    width: 100%;
    max-height: calc(100vh - (2 * var(--space-s)));
    border-radius: var(--radius-m);
    padding: var(--space-m);
  }

  .search-header {
    gap: var(--space-s);
  }

  .search-dialog__close {
    width: 2.5rem;
    height: 2.5rem;
  }
}

@media (max-width: 60rem) {
  .site-brand {
    order: 1;
  }

  .site-nav__actions {
    order: 2;
    margin-left: auto;
  }

  .site-nav__toggle {
    display: inline-flex;
    order: 3;
  }

  .site-nav {
    position: fixed;
    top: calc(3.25rem + (var(--space-s) * 2));
    left: -100%;
    right: auto;
    width: 100%;
    height: calc(100vh - (3.25rem + (var(--space-s) * 2)));
    max-height: none;
    overflow-y: auto;
    padding: 0;
    border: 0;
    border-top: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 0;
    background: linear-gradient(180deg,
      rgba(0, 0, 0, 0.85),
      rgba(0, 0, 0, 0.8),
      rgba(0, 0, 0, 0.85)
    );
    backdrop-filter: blur(25px) saturate(180%);
    -webkit-backdrop-filter: blur(25px) saturate(180%);
    box-shadow:
      0 8px 32px rgba(0, 0, 0, 0.4),
      inset 0 1px 0 rgba(255, 255, 255, 0.15);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    pointer-events: none;
    visibility: hidden;
    transition: left 400ms cubic-bezier(0.68, -0.55, 0.265, 1.55), visibility 400ms ease;
  }

  .site-nav.is-open {
    left: 0;
    pointer-events: all;
    visibility: visible;
  }

  .site-nav__links {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-s);
    width: 100%;
    min-height: 100%;
    padding: var(--space-xl) var(--space-m);
  }

  .site-nav__link {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 4.5rem;
    width: 100%;
    padding: 1.8rem 2rem;
    border: 1px solid var(--glass-border);
    border-radius: 18px;
    text-align: center;
    font-size: 1.4rem;
    font-weight: 600;
    background: linear-gradient(135deg,
      rgba(255, 255, 255, 0.15),
      rgba(255, 255, 255, 0.08)
    );
    border-color: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    box-shadow:
      0 4px 12px rgba(0, 0, 0, 0.15),
      inset 0 1px 0 rgba(255, 255, 255, 0.3);
    transition: all 0.3s ease;
  }

  .site-nav__link i {
    margin-right: 0.75rem;
  }

  .site-nav__link:hover,
  .site-nav__link:focus-visible {
    color: var(--color-text);
    background: linear-gradient(45deg,
      rgba(255, 255, 255, 0.25),
      rgba(200, 200, 200, 0.25)
    );
    border-color: rgba(255, 255, 255, 0.5);
    box-shadow:
      0 6px 20px rgba(255, 255, 255, 0.25),
      0 2px 8px rgba(0, 0, 0, 0.1),
      inset 0 1px 0 rgba(255, 255, 255, 0.4);
  }

  .site-nav__link[aria-current] {
    color: var(--color-text);
    font-weight: 700;
    background: linear-gradient(45deg,
      rgba(255, 255, 255, 0.3),
      rgba(200, 200, 200, 0.3)
    );
    border-color: rgba(255, 255, 255, 0.6);
    box-shadow:
      0 6px 20px rgba(255, 255, 255, 0.3),
      0 2px 8px rgba(0, 0, 0, 0.15),
      inset 0 1px 0 rgba(255, 255, 255, 0.5);
  }

  .site-nav__link[aria-current]::after {
    inset-inline: auto var(--space-l);
    top: 50%;
    bottom: auto;
    width: 0.4rem;
    height: 0.4rem;
    transform: translateY(-50%);
  }

  .site-nav__actions {
    padding-top: 0;
    border-top: 0;
  }

  .site-nav__search-trigger {
    width: 2.75rem;
    min-width: 2.75rem;
    height: 2.75rem;
    padding: 0;
  }

  .site-nav__search-trigger .search-label,
  .site-nav__search-trigger .search-shortcut {
    display: none;
  }
}

@media (max-width: 40rem) {
  /* Smaller header on small screens; adjust offset */
  body {
    padding-top: calc(2.75rem + (var(--space-2xs) * 2));
  }
  .site-header__inner {
    padding-block: var(--space-2xs);
  }

  .site-brand img {
    width: 2.75rem;
  }

  .site-nav {
    top: calc(2.75rem + (var(--space-2xs) * 2));
    height: calc(100vh - (2.75rem + (var(--space-2xs) * 2)));
  }

  .search-shortcut {
    display: none;
  }
}