/* Block: Site Header
   Main page header with logo, navigation, search, and language picker
*/

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--space-lg);
  align-items: center;
  padding: 0 var(--space-md);
}


.site-header::before {
  position: absolute;
  z-index: -1;
  width: 100%;
  display: block;
  content: '';
  top: 0;
  height: 10vh;
  background: linear-gradient(to bottom, var(--bg-hero-gradient-start) 1vh, var(--bg-hero-gradient-end) 100%);
  /* backdrop-filter: blur(1px); */
}


/* Logo */
.logo {
  /* Lock the logo to LTR regardless of page direction so the leaf icon
     stays as the visual entry point on the wordmark in RTL locales.
     The wordmark itself is Latin-script and not localized, so flipping
     the icon to the wordmark's right would create visual dissonance. */
  direction: ltr;
  font-family: var(--font-logo);
  font-size: var(--fs-xl);
  font-weight: 600;
  letter-spacing: 0.01em;
  color: transparent;
  background: linear-gradient(179deg,
    var(--logo-gradient-start) 1%,
    var(--logo-gradient-end) 55%
  );
  background-clip: text;
  -webkit-background-clip: text;
  position: relative;
  padding-inline-start: 1em;
}

.logo:hover,
.logo:focus,
.logo:active,
.logo:visited {
  color: transparent; /* Keep gradient visible */
  text-decoration: none;
}

.logo:hover::before {
  text-shadow: 0.05em 0.05em 0.1em hsl(var(--clr-green-900) / 0.7),
	       0.06em 0.06em 0.2em hsl(var(--clr-coral-500) / 0.6);;
}

.logo::before {
  content: attr(data-text);
  position: absolute;
  inset: 0;
  padding-inline-start: 1em;
  z-index: -1;
  text-shadow: 0.05em 0.05em 0.1em hsl(var(--clr-green-900) / 0.7);
  transition: text-shadow var(--transition-base);
}

.logo-icon {
  position: absolute;
  height: 0.8em;
  margin-block-start: 0.35em;
  margin-inline-start: -0.8em;
  filter: drop-shadow(var(--shadow-logo-icon-sm))
}

/* Header grid positioning */
.site-header .logo {
  grid-column: 1;
}

.site-header .nav-menu {
  grid-column: 2;
  justify-self: center;
  width: clamp(12em, 40%, 24em);
  transition: width var(--transition-fast);
}

.site-header .nav-menu:focus-within {
  width: clamp(16em, 60%, 36em);
}

.site-header .language-picker {
  grid-column: 3;
}

@media (max-width: 768px) {
  .site-header {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .site-header .logo,
  .site-header .nav-menu,
  .site-header .language-picker {
    grid-column: 1;
  }

  .site-header .nav-menu {
    width: min(100%, 25em);
  }

  .site-header .nav-menu:focus-within {
    width: min(100%, 30em);
  }
}