.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  padding: 16px 24px;
  background: transparent;
  transition: transform var(--duration-slow) var(--ease);
  will-change: transform;
}


.site-header.is-hidden { transform: translateY(calc(-100% - 12px)); }

.site-header .navbar {
  --bs-navbar-padding-y: 0;
  --bs-navbar-padding-x: 0;
  max-width: 1300px;
  margin: 0 auto;
  padding: 0;
}


.navbar-shell {
  width: 100%;
  min-height: 72px;
  display: flex;
  align-items: stretch;
  gap: 8px;

  padding: 0 0 0 16px;
  background: linear-gradient(90deg, rgba(var(--white-rgb), .58) 0%, rgba(var(--white-rgb), .30) 60%, rgba(var(--white-rgb), .18) 100%);
  border: 2px solid rgba(var(--white-rgb), .55);
  border-radius: var(--radius-pill);
  -webkit-backdrop-filter: blur(7px);
  backdrop-filter: blur(7px);
  transition: all var(--duration-base) var(--ease);
}


.site-header.is-stuck .navbar-shell {
  background: rgba(var(--white-rgb), .1);
  border-color: rgba(var(--white-rgb), .95);
  box-shadow: var(--shadow-sm);
}


.site-header .navbar-brand {
  display: flex;
  align-items: center;
  flex: 0 0 auto;
  padding: 0;
  margin: 0;
}
.site-header .navbar-brand img {
  height: 56px;
  width: auto;
  object-fit: contain;
  display: block;
}


.site-header .navbar-nav {
  --bs-nav-link-padding-x: 16px;
  --bs-nav-link-padding-y: 0;
  gap: 2px;
}
.site-header .nav-link {
  display: flex;
  align-items: center;
	padding: 8px 12px!important;
  font-weight: var(--weight-medium);
  font-size: var(--text-base);
  color: var(--navy);
  white-space: nowrap;
  border-radius: var(--radius-pill);
  background: transparent;
  transition: background var(--duration-fast) var(--ease),
              color var(--duration-fast) var(--ease);
}
.site-header .nav-link:hover,
.site-header .nav-link:focus,
.site-header .nav-link.active {
  background: var(--white);
  color: var(--navy);
}


.navbar-actions {
  display: flex;
  flex: 0 0 auto;
  gap: 2px;
}
.nav-login,
.nav-signup {
  display: flex;
  align-items: center;
  font-size: var(--text-base);
  color: var(--navy);
  border-radius: var(--radius-pill);
  transition: background var(--duration-fast) var(--ease),
              filter var(--duration-fast) var(--ease);
}
.nav-login {
  font-weight: var(--weight-medium);
  padding: 0 16px;
  background: transparent;
}
.nav-login:hover,
.nav-login.active { background: var(--white); color: var(--navy); }

.nav-signup {
  font-weight: var(--weight-bold);
  padding: 0 32px;
  background: var(--white);
}
.nav-signup:hover,
.nav-signup.active { color: var(--navy); filter: brightness(.97); }


.site-header .navbar-toggler {
  border: 0;
  padding: 0;
  width: 46px;
  height: 46px;
  margin-left: auto;
  align-self: center;
  color: var(--navy);
  box-shadow: none;
}
.site-header .navbar-toggler:focus { box-shadow: none; }
.site-header .navbar-toggler svg { display: block; pointer-events: none; }


@media (min-width: 992px) {
  .site-header .navbar-collapse {
    align-items: stretch;
    gap: 8px;
  }

  .site-header .navbar-nav { align-items: center; margin-left: auto; }
  .site-header .nav-link { margin: 12px 0; }
  .navbar-actions { align-items: stretch; }

  .navbar-shell { overflow: hidden; }
}

@media (min-width: 992px) and (max-width: 1199.98px) {
  .site-header .navbar-nav { --bs-nav-link-padding-x: 12px; }
  .site-header .nav-link,
  .nav-login { font-size: var(--text-sm); }
}


@media (max-width: 991.98px) {
  .site-header .navbar-toggler { display: inline-flex; align-items: center; justify-content: center; }

  .navbar-shell {
    flex-wrap: wrap;
    align-items: center;
    padding: 6px 8px 6px 16px;
    position: relative;
  }
  .site-header .navbar-brand img { height: 46px; }


  .site-header .navbar-collapse.show,
  .site-header .navbar-collapse.collapsing {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    background: var(--white);
    padding: 16px 24px;
    margin-top: 8px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    flex-basis: 100%;
  }
  .site-header .navbar-nav { margin-left: 0; }
  .site-header .nav-link { margin: 0; padding: 12px 18px; justify-content: flex-start; }
  .navbar-actions { flex-direction: column; align-items: stretch; gap: 6px; }
  .nav-login,
  .nav-signup { padding: 12px 18px; justify-content: flex-start; }
}


@media (prefers-reduced-motion: reduce) {
  .site-header,
  .navbar-shell { transition: none; }
}