/* ==========================================================================
   HEADER & NAVIGATION
   Casale Isidoro
   ========================================================================== */

/* --------------------------------------------------------------------------
   Header Container
   -------------------------------------------------------------------------- */

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: var(--z-sticky);
  background-color: var(--bg-card);
  transition:
    background-color var(--transition-base),
    box-shadow var(--transition-base),
    height var(--transition-base);
}

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

/* --- Transparent variant (over hero) --- */
.header--transparent {
  background-color: transparent;
}

/* --- Scrolled State (must come after transparent to win) --- */
.header--scrolled {
  background-color: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-md);
  height: calc(var(--header-height) - 10px);
}

.header--transparent:not(.header--scrolled) .nav__link,
.header--transparent:not(.header--scrolled) .header__logo-text {
  color: #FFFFFF;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
}

/* Logo inversion on transparent header (white logo over hero) */
.header--transparent:not(.header--scrolled) .header__logo-img {
  filter: brightness(0) invert(1);
}

/* --------------------------------------------------------------------------
   Logo
   -------------------------------------------------------------------------- */

.header__logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  z-index: calc(var(--z-sticky) + 5);
  text-decoration: none;
  flex-shrink: 0;
}

.header__logo-img {
  height: 46px;
  width: auto;
  transition: height var(--transition-base);
}

.header--scrolled .header__logo-img {
  height: 38px;
}

.header__logo-text {
  font-family: var(--font-heading);
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  font-weight: var(--fw-regular);
  color: var(--text-primary);
  letter-spacing: 0.02em;
  transition: color var(--transition-base);
  line-height: 1.1;
}

.header__logo-subtitle {
  display: block;
  font-family: var(--font-body);
  font-size: 0.6rem;
  font-weight: var(--fw-regular);
  text-transform: uppercase;
  letter-spacing: 0.25em;
  color: var(--text-muted);
  margin-top: 2px;
}

/* --------------------------------------------------------------------------
   Desktop Navigation
   -------------------------------------------------------------------------- */

.nav {
  display: none;
  align-items: center;
  gap: 0;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: 0;
  list-style: none;
}

.nav__item {
  position: relative;
}

.nav__link {
  display: block;
  padding: 0.5rem 0.8rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: var(--fw-light);
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: color var(--transition-base);
  position: relative;
  text-decoration: none;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 1.1rem;
  right: 1.1rem;
  height: 1px;
  background-color: var(--accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-base);
}

.nav__link:hover,
.nav__link--active {
  color: var(--accent);
}

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

/* --- Dropdown --- */
.nav__item--has-dropdown {
  position: relative;
}

span.nav__link {
  cursor: default;
}

.nav__item--has-dropdown > .nav__link::before {
  display: none;
}

.nav__dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  padding: 0.75rem 0;
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition:
    opacity var(--transition-base),
    visibility var(--transition-base),
    transform var(--transition-base);
  z-index: var(--z-dropdown);
}

.nav__item--has-dropdown:hover .nav__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav__dropdown-link {
  display: block;
  padding: 0.6rem 1.5rem;
  font-size: 0.85rem;
  font-weight: var(--fw-regular);
  color: var(--text-secondary);
  transition: color var(--transition-fast), background-color var(--transition-fast);
  text-decoration: none;
  text-transform: none;
  letter-spacing: 0.02em;
}

.nav__dropdown-link:hover {
  color: var(--accent);
  background-color: var(--bg-secondary);
}

/* --------------------------------------------------------------------------
   Header Actions (Theme Toggle, Language, CTA)
   -------------------------------------------------------------------------- */

.header__actions {
  display: none;
  align-items: center;
  gap: 0.75rem;
}

/* --- Theme Toggle --- */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  cursor: pointer;
  transition:
    color var(--transition-base),
    border-color var(--transition-base),
    background-color var(--transition-base);
}

.theme-toggle:hover {
  color: var(--accent);
  border-color: var(--accent);
  background-color: var(--bg-secondary);
}

.theme-toggle__icon {
  width: 18px;
  height: 18px;
  transition: transform var(--transition-base);
}

.theme-toggle:hover .theme-toggle__icon {
  transform: rotate(15deg);
}

.theme-toggle__icon--sun {
  display: none;
}

.theme-toggle__icon--moon {
  display: block;
}

[data-theme="dark"] .theme-toggle__icon--sun {
  display: block;
}

[data-theme="dark"] .theme-toggle__icon--moon {
  display: none;
}

.header--transparent:not(.header--scrolled) .theme-toggle {
  border-color: rgba(255, 255, 255, 0.4);
  color: #FFFFFF;
}

.header--transparent:not(.header--scrolled) .theme-toggle:hover {
  border-color: #FFFFFF;
  background-color: rgba(255, 255, 255, 0.1);
}

/* --- Language Selector --- */
.lang-selector {
  position: relative;
}

.lang-selector__btn {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.4rem 0.6rem;
  font-size: 0.8rem;
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition:
    color var(--transition-base),
    border-color var(--transition-base);
}

.lang-selector__btn:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.header--transparent:not(.header--scrolled) .lang-selector__btn {
  border-color: rgba(255, 255, 255, 0.4);
  color: #FFFFFF;
}

.lang-selector__dropdown {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  min-width: 100px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  transition:
    opacity var(--transition-fast),
    visibility var(--transition-fast),
    transform var(--transition-fast);
  z-index: var(--z-dropdown);
  overflow: hidden;
}

.lang-selector:hover .lang-selector__dropdown,
.lang-selector__dropdown.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-selector__option {
  display: block;
  width: 100%;
  padding: 0.5rem 1rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  text-align: left;
  background: none;
  border: none;
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.lang-selector__option:hover,
.lang-selector__option--active {
  background-color: var(--bg-secondary);
  color: var(--accent);
}

/* --- Header CTA Button --- */
.header__cta {
  display: none;
}

/* --------------------------------------------------------------------------
   Mobile Navigation Toggle
   -------------------------------------------------------------------------- */

.nav__toggle {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
  z-index: calc(var(--z-overlay) + 5);
  color: var(--text-primary);
  transition: color var(--transition-base);
}

.nav__toggle-icon--menu,
.nav__toggle-icon--close {
  width: 26px;
  height: 26px;
}

/* Hide close icon by default */
.nav__toggle-icon--close,
.nav__toggle .nav__toggle-icon--close,
svg.nav__toggle-icon--close {
  display: none !important;
}

/* Transparent header: white icon */
.header--transparent:not(.header--scrolled) .nav__toggle {
  color: #FFFFFF;
}

/* Open state: show X, hide menu */
.nav__toggle--open .nav__toggle-icon--menu,
.nav__toggle--open svg.nav__toggle-icon--menu {
  display: none !important;
}

.nav__toggle--open .nav__toggle-icon--close,
.nav__toggle--open svg.nav__toggle-icon--close {
  display: block !important;
}

/* When mobile menu is open, always dark icon */
.nav__toggle--open {
  color: var(--text-primary);
}

/* --------------------------------------------------------------------------
   Mobile Full-Screen Overlay
   -------------------------------------------------------------------------- */

.nav__mobile {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  height: 100dvh;
  background-color: var(--bg-primary);
  z-index: var(--z-overlay);
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  padding: calc(var(--header-height) + var(--space-md)) var(--container-padding) var(--space-lg);
  overflow-y: auto;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition:
    opacity var(--transition-slow),
    visibility var(--transition-slow),
    transform var(--transition-slow);
}

.nav__mobile.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav__mobile-list {
  list-style: none;
  width: 100%;
}

.nav__mobile-item {
  border-bottom: 1px solid var(--border-light);
  opacity: 0;
  transform: translateX(-20px);
  transition:
    opacity 0.4s ease,
    transform 0.4s ease;
}

.nav__mobile.is-open .nav__mobile-item {
  opacity: 1;
  transform: translateX(0);
}

.nav__mobile.is-open .nav__mobile-item:nth-child(1) { transition-delay: 0.05s; }
.nav__mobile.is-open .nav__mobile-item:nth-child(2) { transition-delay: 0.1s; }
.nav__mobile.is-open .nav__mobile-item:nth-child(3) { transition-delay: 0.15s; }
.nav__mobile.is-open .nav__mobile-item:nth-child(4) { transition-delay: 0.2s; }
.nav__mobile.is-open .nav__mobile-item:nth-child(5) { transition-delay: 0.25s; }
.nav__mobile.is-open .nav__mobile-item:nth-child(6) { transition-delay: 0.3s; }
.nav__mobile.is-open .nav__mobile-item:nth-child(7) { transition-delay: 0.35s; }

.nav__mobile-link {
  font-family: var(--font-heading);
  font-size: clamp(1.2rem, 3.5vw, 1.5rem);
  font-weight: var(--fw-regular);
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9em 0;
  position: relative;
  transition: color var(--transition-base);
}

.nav__mobile-link:hover,
.nav__mobile-link--active {
  color: var(--accent);
}

/* Arrow indicator for items with sub-menus */
.nav__mobile-item:has(.nav__mobile-sublist) > .nav__mobile-link::after {
  content: '';
  display: block;
  width: 8px;
  height: 8px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg);
  transition: transform var(--transition-base);
  flex-shrink: 0;
  margin-left: var(--space-sm);
}

.nav__mobile-item.is-expanded > .nav__mobile-link::after {
  transform: rotate(-135deg);
}

/* Mobile sub-links — collapsed by default */
.nav__mobile-sublist {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base);
  padding-left: var(--space-md);
}

.nav__mobile-item.is-expanded .nav__mobile-sublist {
  max-height: 500px;
}

.nav__mobile-sublink {
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: var(--fw-light);
  color: var(--text-secondary);
  text-decoration: none;
  display: block;
  padding: 0.5em 0;
  transition: color var(--transition-base);
}

.nav__mobile-sublink:hover {
  color: var(--accent);
}

/* Mobile menu footer actions */

.nav__mobile-cta {
  margin-top: var(--space-lg);
  width: 100%;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.4s ease 0.4s, transform 0.4s ease 0.4s;
}

.nav__mobile.is-open .nav__mobile-cta {
  opacity: 1;
  transform: translateY(0);
}

.nav__mobile-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-top: var(--space-lg);
  opacity: 0;
  transition: opacity 0.4s ease 0.45s;
}

.nav__mobile.is-open .nav__mobile-actions {
  opacity: 1;
}

/* Reduced motion: disable staggered entrance */
@media (prefers-reduced-motion: reduce) {
  .nav__mobile-item,
  .nav__mobile-cta,
  .nav__mobile-actions {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

.nav__mobile-cta .btn {
  width: 100%;
  text-align: center;
}

/* --------------------------------------------------------------------------
   Dark Mode
   -------------------------------------------------------------------------- */

[data-theme="dark"] .header--scrolled {
  background-color: rgba(15, 15, 15, 0.95);
  border-bottom: 1px solid var(--border);
}

[data-theme="dark"] .header:not(.header--transparent) {
  border-bottom: 1px solid var(--border);
}

/* In dark mode, logo should be light (inverted) on solid header */
[data-theme="dark"] .header:not(.header--transparent) .header__logo-img,
[data-theme="dark"] .header--scrolled .header__logo-img {
  filter: brightness(0) invert(1);
}

/* In dark mode, nav links use white for active/hover instead of gold ocra */
[data-theme="dark"] .nav__link:hover,
[data-theme="dark"] .nav__link--active {
  color: #FFFFFF;
}

[data-theme="dark"] .nav__link::after {
  background-color: #FFFFFF;
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */

@media (min-width: 1024px) {
  .header__inner {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
  }

  .nav {
    display: flex;
    justify-self: center;
  }

  .header__actions {
    display: flex;
    justify-self: end;
  }

  .nav__toggle {
    display: none;
  }

  .nav__mobile {
    display: none;
  }

  .header__cta {
    display: inline-flex;
  }
}