/* Shared: Header
 * Common sticky navigation with an optional back-link variant.
 */

html {
  scrollbar-gutter: stable;
}

.site-header {
  position: sticky;
  top: 0;
  left: auto;
  z-index: 100;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 32px;
  box-sizing: border-box;
  width: 100%;
  min-height: 72px;
  padding: 14px max(24px, calc((100% - var(--container-max)) / 2));
  transform: none;
  overflow: visible;
  border: 1px solid var(--color-border-card);
  border-top: 0;
  border-radius: 0 0 var(--radius-card) var(--radius-card);
  background: var(--color-header-bg);
  box-shadow: var(--shadow-header);
  backdrop-filter: blur(13.5px);
  -webkit-backdrop-filter: blur(13.5px);
}

.site-header__logo {
  position: static;
  display: flex;
  align-items: center;
  justify-self: start;
  width: auto;
  height: auto;
  transform: none;
}

.site-header__logo img {
  display: block;
  width: 200px;
  height: auto;
  aspect-ratio: 200 / 30;
}

.site-header__nav {
  position: static;
  justify-self: end;
  width: auto;
  height: auto;
  transform: none;
}

.site-header__menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  margin: 0;
  padding: 9px;
  border: 1px solid var(--color-border-card);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--color-text);
  cursor: pointer;
}

.site-header__menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.site-header__nav ul {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(16px, 2vw, 30px);
  min-height: 30px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-header__nav a,
.site-header__back {
  color: var(--color-text-80);
  font-family: var(--font-family);
  font-size: 15px;
  font-weight: 590;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.15s ease;
}

.site-header__nav a {
  position: relative;
  display: flex;
  align-items: center;
  height: 30px;
}

.site-header__nav a::after {
  position: absolute;
  right: 0;
  bottom: -9px;
  left: 0;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  content: "";
  opacity: 0;
}

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

.site-header__nav a[aria-current="page"]::after {
  opacity: 1;
}

.site-header__nav a:hover,
.site-header__back:hover {
  color: var(--color-text);
}

.site-header--back {
  grid-template-columns: auto 1fr auto;
}

.site-header__back {
  display: inline-flex;
  align-items: center;
  justify-self: end;
  gap: 8px;
}

.site-header__back svg {
  width: 16px;
  height: 16px;
}

@media (max-width: 899px) {
  .site-header {
    min-height: 58px;
    display: flex;
    justify-content: flex-start;
    padding: 12px 20px;
    border-radius: 0 0 20px 20px;
  }

  .site-header__logo img {
    width: 150px;
  }

  .site-header__menu-toggle {
    position: absolute;
    right: 20px;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
  }

  .site-header__nav {
    position: absolute;
    top: calc(100% + 8px);
    right: 12px;
    left: 12px;
    display: block;
    width: calc(100% - 24px);
    max-height: calc(100vh - 82px);
    padding: 10px;
    overflow-y: auto;
    border: 1px solid var(--color-border-card);
    border-radius: 20px;
    background: var(--color-header-menu-bg);
    box-shadow: var(--shadow-header);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0s linear 0.2s;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
  }

  .site-header__nav ul {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .site-header__nav a {
    display: block;
    height: auto;
    padding: 12px 14px;
    border-radius: 12px;
    font-size: 16px;
  }

  .site-header__nav a:hover,
  .site-header__nav a:focus-visible {
    background: rgba(255, 255, 255, 0.06);
  }

  .site-header__nav a[aria-current="page"] {
    background: rgba(241, 165, 117, 0.12);
    box-shadow: inset 0 0 0 1px rgba(241, 165, 117, 0.24);
  }

  .site-header__nav a[aria-current="page"]::after {
    display: none;
  }

  .site-header--menu-open .site-header__nav {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
    transition-delay: 0s;
  }

  .site-header--menu-open .site-header__menu-toggle span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }

  .site-header--menu-open .site-header__menu-toggle span:nth-child(2) {
    opacity: 0;
  }

  .site-header--menu-open .site-header__menu-toggle span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }

  .site-header--back {
    justify-content: space-between;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header__menu-toggle span,
  .site-header__nav {
    transition: none;
  }
}