/* ==========================================================================
   HEADER.CSS — Sagra San Giuseppe
   Sticky header with transparent-to-solid scroll transition,
   organic navigation styling, hamburger menu, and floral accents.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Site header — base
   -------------------------------------------------------------------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  padding: var(--space-md) 0;
  transition: background-color var(--transition-base),
              padding var(--transition-base),
              box-shadow var(--transition-base);
}

/* Transparent state (on hero) */
.site-header--transparent {
  background-color: transparent;
}

/* Scrolled state — solid teal background */
.site-header--scrolled {
  background-color: rgba(26, 107, 90, 0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: var(--space-sm) 0;
  box-shadow: var(--shadow-sm);
}

/* --------------------------------------------------------------------------
   2. Header inner layout
   -------------------------------------------------------------------------- */
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* --------------------------------------------------------------------------
   3. Logo
   -------------------------------------------------------------------------- */
.site-header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  z-index: calc(var(--z-header) + 2);
}

/* Flower icon next to logo text */
.site-header__logo-icon {
  width: 36px;
  height: 36px;
  color: var(--color-primary);
  transition: transform var(--transition-spring);
}

.site-header__logo:hover .site-header__logo-icon {
  transform: rotate(15deg) scale(1.1);
}

/* Transparent header — white icon */
.site-header--transparent .site-header__logo-icon {
  color: var(--color-white);
}

.site-header--scrolled .site-header__logo-icon {
  color: var(--color-accent);
}

/* Logo text */
.site-header__logo-text {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  color: var(--color-soil);
  line-height: 1.2;
}

.site-header--transparent .site-header__logo-text {
  color: var(--color-white);
}

.site-header--scrolled .site-header__logo-text {
  color: var(--color-cream);
}

.site-header__logo-sub {
  display: block;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: var(--weight-normal);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  opacity: 0.7;
}

/* --------------------------------------------------------------------------
   4. Navigation
   -------------------------------------------------------------------------- */
.site-header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

/* Individual nav link */
.site-header__nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 0.875rem;
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-bark);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: color var(--transition-fast),
              background-color var(--transition-fast);
}

.site-header__nav-link:hover {
  color: var(--color-primary);
  background-color: var(--color-primary-pale);
}

/* Scrolled header — cream text on teal */
.site-header--scrolled .site-header__nav-link {
  color: rgba(251, 245, 230, 0.9);
}

.site-header--scrolled .site-header__nav-link:hover {
  color: var(--color-cream);
  background-color: rgba(255, 255, 255, 0.12);
}

/* Transparent header — white text */
.site-header--transparent .site-header__nav-link {
  color: rgba(255, 255, 255, 0.9);
}

.site-header--transparent .site-header__nav-link:hover {
  color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.12);
}

/* Clean underline on hover */
.site-header__nav-link::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 0.875rem;
  right: 0.875rem;
  height: 2px;
  background-color: var(--color-accent);
  border-radius: var(--radius-pill);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition-base);
}

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

.site-header--transparent .site-header__nav-link::after {
  background-color: var(--color-white);
}

.site-header--scrolled .site-header__nav-link::after {
  background-color: var(--color-accent);
}

.site-header--scrolled .site-header__nav-link.is-active {
  color: var(--color-cream);
}

/* Active page state */
.site-header__nav-link.is-active {
  color: var(--color-primary);
  font-weight: var(--weight-semibold);
}

.site-header--transparent .site-header__nav-link.is-active {
  color: var(--color-white);
}

/* --------------------------------------------------------------------------
   5. Header CTA button
   -------------------------------------------------------------------------- */
.site-header__cta {
  margin-left: var(--space-sm);
}

.site-header--transparent .site-header__cta.btn--primary {
  background-color: rgba(255, 255, 255, 0.95);
  border-color: var(--color-white);
  color: var(--color-primary-dark);
}

.site-header--transparent .site-header__cta.btn--primary:hover {
  background-color: var(--color-white);
  border-color: var(--color-white);
  color: var(--color-primary);
}

/* Scrolled header — CTA cream on teal background */
.site-header--scrolled .site-header__cta.btn--primary {
  background-color: var(--color-cream);
  border-color: var(--color-cream);
  color: var(--color-primary-dark);
}

.site-header--scrolled .site-header__cta.btn--primary:hover {
  background-color: var(--color-white);
  border-color: var(--color-white);
  color: var(--color-primary-dark);
}

/* --------------------------------------------------------------------------
   6. Hamburger button (mobile)
   -------------------------------------------------------------------------- */
.site-header__hamburger {
  display: none; /* Shown on mobile via responsive.css */
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
  z-index: calc(var(--z-header) + 2);
}

.site-header__hamburger-line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-bark);
  border-radius: var(--radius-pill);
  transition: transform var(--transition-base),
              opacity var(--transition-fast);
}

.site-header__hamburger-line + .site-header__hamburger-line {
  margin-top: 6px;
}

/* Transparent header — white lines */
.site-header--transparent .site-header__hamburger-line {
  background-color: var(--color-white);
}

.site-header--scrolled .site-header__hamburger-line {
  background-color: var(--color-cream);
}

/* Hamburger open state — X shape */
.site-header__hamburger.is-open .site-header__hamburger-line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.site-header__hamburger.is-open .site-header__hamburger-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.site-header__hamburger.is-open .site-header__hamburger-line:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* --------------------------------------------------------------------------
   7. Mobile navigation overlay
   -------------------------------------------------------------------------- */
.site-header__mobile-nav {
  display: none; /* Shown on mobile via responsive.css */
  position: fixed;
  inset: 0;
  background-color: var(--color-primary);
  z-index: calc(var(--z-header) + 1);
  padding: calc(80px + var(--space-xl)) var(--container-padding) var(--space-xl);
  flex-direction: column;
  justify-content: center;
  align-items: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base),
              visibility var(--transition-base);
}

.site-header__mobile-nav.is-open {
  opacity: 1;
  visibility: visible;
}

.site-header__mobile-nav-list {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}

.site-header__mobile-nav-link {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
  color: var(--color-cream);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.site-header__mobile-nav-link:hover,
.site-header__mobile-nav-link.is-active {
  color: var(--color-accent-light);
}

.site-header__mobile-cta {
  margin-top: var(--space-xl);
}