/* ==========================================================================
   Header / Navigation Bar
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border-light);
  height: var(--header-height);
  display: flex;
  align-items: center;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

/* ── Logo ── */
.site-header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: var(--color-primary-dark);
}

.site-header__logo img {
  height: 40px;
  width: auto;
}

/* ── Navigation ── */
.site-header__nav {
  display: none;
}

.site-header__nav-list {
  display: flex;
  gap: var(--space-lg);
}

.site-header__nav-link {
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text);
  padding: var(--space-xs) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.site-header__nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-base);
}

.site-header__nav-link:hover,
.site-header__nav-link--active {
  color: var(--color-primary);
}

.site-header__nav-link:hover::after,
.site-header__nav-link--active::after {
  width: 100%;
}

/* ── Actions (Cart) ── */
.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.site-header__cart {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.site-header__cart:hover {
  background-color: var(--color-bg-alt);
}

.site-header__cart-icon {
  width: 22px;
  height: 22px;
}

.site-header__cart-count {
  position: absolute;
  top: 2px;
  right: 2px;
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ── Mobile menu toggle (CSS-only) ── */
.site-header__menu-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-xs);
  cursor: pointer;
}

.site-header__menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  transition: var(--transition-fast);
}

.site-header__menu-checkbox {
  display: none;
}

.site-header__menu-checkbox:checked ~ .site-header__nav {
  display: flex;
  position: absolute;
  top: var(--header-height);
  left: 0;
  right: 0;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border-light);
  padding: var(--space-lg);
  box-shadow: var(--shadow-md);
}

.site-header__menu-checkbox:checked ~ .site-header__nav .site-header__nav-list {
  flex-direction: column;
  gap: var(--space-md);
}

/* ── Desktop ── */
@media (min-width: 768px) {
  .site-header__nav {
    display: flex;
  }

  .site-header__menu-toggle {
    display: none;
  }
}