/* =============================================
   Matcha Collective — Header & Navigation
   ============================================= */

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

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
  height: 100%;
}

/* Logo */
.site-header__logo {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--color-primary-dark);
  text-decoration: none;
  flex-shrink: 0;
}

.site-header__logo img {
  height: 36px;
  width: auto;
}

/* Desktop Navigation */
.site-nav {
  display: none;
  align-items: center;
  gap: 2rem;
}

.site-nav__link {
  font-size: 0.85rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text);
  text-decoration: none;
  position: relative;
  transition: color var(--transition-base);
}

.site-nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.site-nav__link:hover,
.site-nav__link.is-active {
  color: var(--color-primary);
}

.site-nav__link:hover::after,
.site-nav__link.is-active::after {
  transform: scaleX(1);
}

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

/* Cart Button */
.cart-toggle {
  position: relative;
  background: none;
  border: none;
  padding: 0.25rem;
  cursor: pointer;
  color: var(--color-text);
  transition: color var(--transition-fast);
}

.cart-toggle:hover {
  color: var(--color-primary);
}

.cart-toggle svg {
  width: 24px;
  height: 24px;
  stroke-width: 1.5;
}

.cart-toggle__count {
  position: absolute;
  top: -4px;
  right: -6px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-accent-pink);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.cart-toggle__count:empty,
.cart-toggle__count[data-count="0"] {
  display: none;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  background: none;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
  width: 36px;
  height: 36px;
}

.mobile-menu-toggle__line {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-base);
}

/* Hamburger → X animation */
.mobile-menu-toggle.is-active .mobile-menu-toggle__line:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.is-active .mobile-menu-toggle__line:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.is-active .mobile-menu-toggle__line:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Navigation Drawer */
.mobile-nav {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-bg);
  z-index: 99;
  padding: var(--space-xl) var(--space-lg);
  transform: translateX(-100%);
  transition: transform var(--transition-slow);
  overflow-y: auto;
}

.mobile-nav.is-open {
  transform: translateX(0);
}

.mobile-nav__link {
  display: block;
  padding: var(--space-md) 0;
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--color-text);
  text-decoration: none;
  border-bottom: 1px solid var(--color-border);
  transition: color var(--transition-fast);
}

.mobile-nav__link:hover {
  color: var(--color-primary);
}

/* Desktop breakpoint */
@media (min-width: 769px) {
  .site-nav {
    display: flex;
  }

  .mobile-menu-toggle {
    display: none;
  }

  .mobile-nav {
    display: none;
  }
}