/* ── Site Header ─────────────────────────────────────────── */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  height: var(--header-h);
  background: var(--color-paper);
  border-bottom: 1px solid var(--border);
  transition: background var(--t-base) var(--ease),
              border-color var(--t-base) var(--ease),
              box-shadow var(--t-base) var(--ease);
}

.site-header.is-transparent {
  background: transparent;
  border-bottom-color: transparent;
}

.site-header.is-scrolled {
  background: var(--color-paper);
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-sm);
}

.site-header__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  height: 100%;
  padding-inline: var(--gutter);
  max-width: var(--max-w);
  margin-inline: auto;
}

/* Logo */

.site-header__logo {
  grid-column: 1;
  display: flex;
  align-items: center;
}

.site-header__logo img {
  height: 1.375rem;
  width: auto;
}

/* Desktop nav — centered */

.site-header__nav {
  grid-column: 2;
  display: none;
}

/* Utilities — right side */

.site-header__utils {
  grid-column: 3;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--sp-1);
}

.header-icon {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  color: var(--color-ink);
  border-radius: var(--radius-sm);
  transition: opacity var(--t-fast) var(--ease);
}

.header-icon:hover { opacity: 0.6; }

.header-icon svg {
  width: 1.125rem;
  height: 1.125rem;
}

/* Cart badge */

.header-icon__badge {
  position: absolute;
  top: 0.25rem;
  right: 0.25rem;
  width: 0.9rem;
  height: 0.9rem;
  background: var(--color-ink);
  color: var(--color-paper);
  font-size: 0.5rem;
  font-weight: var(--fw-semi);
  letter-spacing: 0;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  opacity: 0;
  transform: scale(0.6);
  transition: opacity var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}

.header-icon__badge.is-visible {
  opacity: 1;
  transform: scale(1);
}

/* Mobile menu trigger */

.header-menu-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  width: 2.25rem;
  height: 2.25rem;
  color: var(--color-ink);
}

.header-menu-btn span {
  display: block;
  width: 1.25rem;
  height: 1px;
  background: currentColor;
  transition: transform var(--t-base) var(--ease), opacity var(--t-fast) var(--ease);
  transform-origin: center;
}

.header-menu-btn.is-open span:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}
.header-menu-btn.is-open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.header-menu-btn.is-open span:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

/* Desktop nav layout */

@media (min-width: 1024px) {
  .site-header {
    height: var(--header-h-lg);
  }

  .site-header__logo img {
    height: 1.5rem;
  }

  .site-header__nav {
    display: flex;
    align-items: center;
    gap: var(--sp-4);
  }

  .nav-link {
    font-size: var(--text-xs);
    font-weight: var(--fw-medium);
    letter-spacing: var(--ls-widest);
    text-transform: uppercase;
    color: var(--color-ink);
    padding-block: 0.5rem;
    border-bottom: 1px solid transparent;
    transition: border-color var(--t-fast) var(--ease);
  }

  .nav-link:hover,
  .nav-link.is-active {
    opacity: 1;
    border-bottom-color: var(--color-ink);
  }

  .header-menu-btn { display: none; }
}

/* Transparent header on hero pages */
@media (min-width: 1024px) {
  .site-header.is-transparent .nav-link { color: var(--color-paper); }
  .site-header.is-transparent .header-icon { color: var(--color-paper); }
  .site-header.is-transparent .header-icon__badge { background: var(--color-paper); color: var(--color-ink); }
  .site-header.is-transparent .header-menu-btn span { background: var(--color-paper); }
  .site-header.is-transparent .site-header__logo img {
    filter: invert(1) brightness(2);
  }
}

/* Marquee offset — see marquee.css for .site-marquee styles */
body.has-marquee .site-header {
  top: 2.25rem;
}

/* ── Mega menu ────────────────────────────────────────────── */

.mega-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-paper);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
  z-index: var(--z-above);
}

.mega-menu.is-open {
  display: block;
}

.mega-menu__inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-6);
  padding: var(--sp-6) var(--gutter);
  max-width: var(--max-w);
  margin-inline: auto;
}

.mega-menu__col-title {
  font-size: var(--text-xs);
  font-weight: var(--fw-semi);
  letter-spacing: var(--ls-widest);
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--sp-2);
}

.mega-menu__link {
  display: block;
  font-size: var(--text-sm);
  letter-spacing: var(--ls-wide);
  color: var(--color-ink);
  padding-block: 0.375rem;
  border-bottom: 1px solid transparent;
  transition: border-color var(--t-fast), opacity var(--t-fast);
}

.mega-menu__link:hover {
  opacity: 1;
  border-bottom-color: var(--color-ink);
}

.mega-menu__featured {
  position: relative;
  min-height: 10rem;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.mega-menu__featured-label {
  position: absolute;
  bottom: var(--sp-2);
  left: var(--sp-2);
  font-size: var(--text-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-widest);
  text-transform: uppercase;
  color: var(--color-paper);
}

/* ── Search bar ───────────────────────────────────────────── */

.header-search {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-paper);
  border-bottom: 1px solid var(--border);
  padding: var(--sp-3) var(--gutter);
  box-shadow: var(--shadow);
}

.header-search.is-open { display: block; }

.header-search__input {
  width: 100%;
  max-width: var(--content-w);
  margin-inline: auto;
  display: block;
  padding: 0.75rem 1rem;
  font-size: var(--text-md);
  border: none;
  border-bottom: 1px solid var(--border);
  background: transparent;
  outline: none;
  letter-spacing: var(--ls-wide);
}

.header-search__input::placeholder {
  color: var(--text-muted);
}